AU2018233039B2 - A mining dump truck - Google Patents

A mining dump truck Download PDF

Info

Publication number
AU2018233039B2
AU2018233039B2 AU2018233039A AU2018233039A AU2018233039B2 AU 2018233039 B2 AU2018233039 B2 AU 2018233039B2 AU 2018233039 A AU2018233039 A AU 2018233039A AU 2018233039 A AU2018233039 A AU 2018233039A AU 2018233039 B2 AU2018233039 B2 AU 2018233039B2
Authority
AU
Australia
Prior art keywords
dump truck
assembly
frame
mining dump
cab
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
AU2018233039A
Other versions
AU2018233039A1 (en
Inventor
Guogang He
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mcc (xiang Tan) Mining Equipment LLC
Original Assignee
Mcc Xiang Tan Mining Equipment LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201520579172.9U external-priority patent/CN204936731U/en
Priority claimed from CN201520578724.4U external-priority patent/CN204937218U/en
Priority claimed from CN201520578299.9U external-priority patent/CN204937276U/en
Priority claimed from CN201520578318.8U external-priority patent/CN204936851U/en
Priority claimed from CN201520579171.4U external-priority patent/CN204937277U/en
Priority claimed from CN201510470439.5A external-priority patent/CN104999873A/en
Priority claimed from CN201520579058.6U external-priority patent/CN204936826U/en
Priority claimed from CN201520578298.4U external-priority patent/CN204937007U/en
Priority claimed from CN201520578864.1U external-priority patent/CN204936834U/en
Priority claimed from CN201520579078.3U external-priority patent/CN204936905U/en
Priority claimed from CN201520579060.3U external-priority patent/CN204936941U/en
Priority claimed from CN201520578297.XU external-priority patent/CN204942160U/en
Priority claimed from CN201520578668.4U external-priority patent/CN204941114U/en
Priority claimed from CN201520578775.7U external-priority patent/CN204936970U/en
Priority claimed from CN201520577224.9U external-priority patent/CN205185729U/en
Priority claimed from CN201520583056.4U external-priority patent/CN204937009U/en
Priority claimed from CN201520583612.8U external-priority patent/CN204936702U/en
Priority claimed from CN201520582888.4U external-priority patent/CN204937008U/en
Priority claimed from CN201520583266.3U external-priority patent/CN204937010U/en
Priority claimed from CN201520582559.XU external-priority patent/CN204941326U/en
Priority claimed from CN201520582889.9U external-priority patent/CN204936840U/en
Priority claimed from CN201520582560.2U external-priority patent/CN204936908U/en
Priority claimed from CN201520583339.9U external-priority patent/CN204936909U/en
Priority claimed from CN201520582932.1U external-priority patent/CN204936730U/en
Priority claimed from CN201520582970.7U external-priority patent/CN204937138U/en
Priority claimed from CN201520583321.9U external-priority patent/CN204936843U/en
Priority claimed from CN201520583574.6U external-priority patent/CN204942115U/en
Priority claimed from CN201520583200.4U external-priority patent/CN204932674U/en
Priority claimed from CN201520583298.3U external-priority patent/CN204943003U/en
Priority claimed from CN201520583558.7U external-priority patent/CN204937024U/en
Priority claimed from CN201520583635.9U external-priority patent/CN204947765U/en
Priority claimed from CN201520586581.1U external-priority patent/CN204936811U/en
Priority claimed from CN201520586528.1U external-priority patent/CN204936732U/en
Priority claimed from CN201520586567.1U external-priority patent/CN204936706U/en
Priority claimed from CN201520586457.5U external-priority patent/CN204937219U/en
Priority claimed from CN201520586200.XU external-priority patent/CN204941745U/en
Priority claimed from CN201520586853.8U external-priority patent/CN204936694U/en
Priority claimed from CN201520586134.6U external-priority patent/CN204936742U/en
Priority claimed from CN201520587696.2U external-priority patent/CN204936799U/en
Priority claimed from CN201520587366.3U external-priority patent/CN204937220U/en
Priority claimed from CN201520586612.3U external-priority patent/CN204947746U/en
Priority claimed from CN201520586540.2U external-priority patent/CN204937232U/en
Priority claimed from CN201520586276.2U external-priority patent/CN205185941U/en
Priority claimed from CN201510476037.6A external-priority patent/CN105015329B/en
Priority claimed from CN201520586621.2U external-priority patent/CN204941664U/en
Priority claimed from CN201520586135.0U external-priority patent/CN204936904U/en
Priority claimed from CN201520586196.7U external-priority patent/CN204936910U/en
Application filed by Mcc Xiang Tan Mining Equipment LLC filed Critical Mcc Xiang Tan Mining Equipment LLC
Priority to AU2018233039A priority Critical patent/AU2018233039B2/en
Publication of AU2018233039A1 publication Critical patent/AU2018233039A1/en
Application granted granted Critical
Publication of AU2018233039B2 publication Critical patent/AU2018233039B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

This invention provides a mining dump truck which comprises a frame assembly, a travel assembly, a cab assembly, a compartment assembly and a power-train, wherein the travel assembly, the cab assembly and the compartment assembly are integrally arranged on the frame assembly, and the power-train provides power to the travel assembly. One 10 objective of this invention is to provide a mining dump truck with improvements on various aspects such as driving comfort, vehicle security, stability and rigidity, production process simplification and the like. In particular, major improvements are made to address the problem that the parts of the dump truck can be easily damaged or dropped due to high loads during the working process. In conclusion, the mining dump 15 truck provided in this invention is obviously superior to the prior art. Figure 1 -- T--223 Figure 2 113 11231 112 112 123 1124 Figure3

Description

A MINING DUMP TRUCK
The present application is a Divisional of Australian Patent Application No. 2016210703 titled “MINING DUMP TRUCK” which was filed on 4 August 2016. The content of this application is incorporated by reference in its entirety.
TECHNICAL FIELD [0001] The present invention belongs to the field of mining equipment, and relates to an off-road vehicle, and more specifically, to a mining dump truck.
BACKGROUND [0002] As off-road (mining) vehicles have experienced several decades of development both in China and abroad, the basic technologies have been very mature and many domestic and foreign enterprises have developed mature products. With rapid development of economy in China's neighboring countries and African countries since the year 2000, demands for dump trucks have been steadily and quickly increased. Meanwhile, China has gradually improved the standards, laws and regulations for dump trucks to make a profile of a system of standards gradually clear. The structure and content of China’s related laws, regulations and standards gradually accord with those of international standards, which shows strict requirements on security, environmental protection, man-machine engineering and other aspects. The competition and development of off-road (mining) dump trucks have entered a new era accordingly. At present, loading masses of dump trucks produced in China range from 108 tons to 363 tons. As the loading mass is huge, the rear axle bears great carrying capacity. In addition to varied and complicated driving situations such as road conditions of surface mines, dump trucks have high requirements on rigidity and damping characteristics and therefore shall be configured with suspension connecting members with high performance. In summary, it has become a focus in this filed to develop a dump truck with high stability, security and comfort levels.
2018233039 21 Sep 2018
SUMMARY [0003] A mining dump truck is provided, which comprises a frame assembly, a travel assembly, a cab assembly, a compartment assembly and a power-train, wherein the travel assembly, the cab assembly and the compartment assembly are respectively arranged on the frame assembly, and the power-train provides power for the travel assembly.
[0004] Preferably, the cab assembly and the compartment assembly are sequentially arranged to the frame assembly from the front to the rear of the truck, and the travel assembly, and hydraulic-electronic control system and a drive assembly are respectively arranged on the frame assembly via respective functional components.
[0005] More preferably, the automotive assembly comprises a main frame, wherein the main frame integrates lateral ridges arranged in pairs and a plurality of transverse beams sequentially arranged between the pairs of lateral ridges into a whole; a bumper is arranged on the forefront end of the main frame along the traveling direction and integrates the main frame as a whole.
[0006] More preferably, there are 4 above-mentioned transverse beams, namely, first to fourth transverse beams. As a preferred embodiment, the first transverse beam acts as a connecting and supporting part between the cab assembly and the frame assembly; the second transverse beam acts as a connecting and supporting part between the travel assembly and the frame assembly; the third and fourth transverse beams act as connecting and supporting parts between the compartment assembly and the frame assembly.
[0007] In order to reduce the weight of the whole truck, the automotive assembly is of a hollow structure. As a preferred embodiment, the hollow structure is surrounded by a plurality of plates welded together. The first transverse beam is respectively connected with the platform assembly, the cab and the control center of the cab assembly. In addition, each end of the first transverse beam is connected to one end of an oil cylinder (connected to the other end of the oil cylinder) of the first suspension cylinder component pair (the front suspension cylinders) of the suspension structure of the travel assembly. The second transverse beam is connected with the steering mechanism of the travel assembly; specifically, the second transverse beam is sleeved by the steering
2018233039 21 Sep 2018 mechanism of the travel assembly through a pin shaft. The third transverse beam is connected with the truck hopper of the compartment assembly and with one end of the lifting support. The fourth transverse beam is connected with the other end of the lifting support of the lifting mechanism of the compartment assembly and with first pull rods of the second suspension cylinder component pair (the rear suspension cylinders).
[0008] As a preferred embodiment, the bumper is of box-shaped structure comprising a first erected plate (front), a second erected plate (rear), two side plates provided at both sides of the first erected plate and a cover plate connected to upper ends of the first erected plate (front), the second erected plate (rear) and said two side plates. A ribbed plate is connected between the above-mentioned first (front) and second (rear) erected plates and the cover plate to further enhance the strength of the box-shaped bumper so as to avoid deformation of the bumper due to collision. One or more ribbed plates can be provided, e.g. four ribbed plates are provided in this embodiment, wherein the middle two of the ribbed plates adjacent to a central axis of the bumper (along the travelling direction of the vehicle) are solid. A relatively closed space can be formed by two solid ribbed plates in combination with the first and second erected plates and following parts of the frame so as to avoid communication of the interior of the bumper with the ambient atmosphere and thus rust in the interior of the bumper, so that the operational stability of the bumper is further guaranteed. Accordingly, base d on the above structure, two distal ribbed plates have a through-hole at the middle portion for enhancing the strength and reducing the weight of the bumper to reduce the cost of the bumper. In addition, the above-mentioned cover plate is provided with a wiring hole for a battery casing at its middle portion, for extending lines for the battery casing in a vertical direction to rationalize the circuit layout. The cover plate has a width at its middle portion less than at its both sides, and both sides of the cover plate, both sides of the front erected plate and said two side plates are connected to form two bumper platforms. Said side plate is provided with at least one groove recessing towards the middle so as to form at least one running board. One or more such running board can be provided. With such structure, both sides of the box-shaped bumper are integrally formed with a temporary staying platform for an operator to step on or off the dump truck, and because
2018233039 21 Sep 2018 the running board is directly provided on the side plate of the platform, the bumper platform, running board and bumper are integrated with each other for better integrity, without need in welding the bumper platform and the running board separately in comparison with the prior art. Therefore, the procedures for manufacturing the dump truck are reduced and the production efficiency is increased. In view of these, a vertical ladder mounting base or an inclined ladder mounting base is located above the bumper platform for facilitating stepping onto the vehicle body thereby, wherein one end of the vertical ladder and/or inclined ladder is mounted on the bumper platform and the other on the vehicle body. Further, it is also possible to mount a rope ladder mounting base beneath the bumper platform for stepping onto the bumper platform thereby. As a preferable variation for this embodiment, the above-mentioned first erected plate, second erected plate, two side plates and cover plate can be made by steel plates respectively, by welding which the bumper can be formed integrally, so that not only the requirement of bumper strength is met, but also the welding process is simple and reliable. The invention is not limited to steel structures, and other high strength structures such as copper structure can be adopted. The mounting process is also not limited to welding, and other connecting means like screw connection can be adopted, only if the required strength and simple and reliable process can be obtained thereby. It can be achieved in the finite element calculation that a rectangular body suffers less stress than a cylinder body with an equivalent cross section when both are applied with the same torque. In view of this, the box-shaped bumper in the mining dump truck according to this embodiment has an increased torsional rigidity, extended service life, reduced procedures and increased work efficiency, in comparison with a circular-pipe shaped bumper in prior art. It shall be appreciated that said directional wording is based on the figures of the description, without limiting the protection scope of this invention thereto. [0009] As a preferred embodiment, along the traveling direction of the truck, the travel assembly comprise steering mechanisms, braking devices, a front axle, a rear axle and a suspension cylinder mechanisms, wherein the front axle, the rear axle, the suspension cylinder mechanisms, the braking devices and the steering mechanism are respectively connected with the frame assembly; the steering mechanism is arranged within the front
2018233039 21 Sep 2018 axle; the braking devices are respectively arranged at the front and rear axles; the suspension cylinder mechanisms are respectively arranged at the front and rear axles;
and a pair of electrical wheels is arranged at the rear axle. Thus, the core transmission structure of the whole dump truck is completed, and the whole truck is driven by the power provided by the power-train to the electrical wheel pairs.
[0010] Another objective of the present invention is to make significant improvements specific to the rear axle connecting member in the frame assembly and the travel assembly by creatively designing a rear axle connecting member, which improves a force bearing status of the frame assembly and enhances the strength thereof. The rear axle connecting member comprises connection lug supports provided in a pair and connection beams which connect the two connection lug supports and which may be made of plates or pipes adopting an integral structure or a structure formed by several pieces. The specific structure of the connection beam can be selected according to the actual needs. In addition, the connection beam may fixedly connect the pair of connection lug supports by welding or bolt connection. Said welding manner is easy to realize, thereby ensuring solid structures.
[0011] Preferably, enforcement plates are welded around the pair of connection lug supports respectively, which may improve the force bearing status of the frame assembly and enhance the strength thereof.
[0012] As a preferred example in the present embodiment, the connection beam is a plate; the pair of connection lug supports respectively penetrate and are welded with the lateral ridges of the main frame. Preferably, the connection beam integrally and fixedly connected with the connection lug supports through welding. The enforcement plate preferably comprises circular lugs welded respectively in pairs. An inner circumference of an enforcement plate is welded on the outer circumference of the corresponding connection lug support, and an outer circumference thereof is welded on the inner side of the lateral ridges. Another enforcement plate and the connection lug supports are arranged in the same manner. A first core improvement of the connecting member lies in that the pairs of connection beams are integrally connected with the pair of connection lug supports so as to offset component forces in left and right directions borne by the
2018233039 21 Sep 2018 pair of connection lug supports, which improves the force bearing status of the frame assembly and enhances the strength thereof. Another core improvement lies in that the pair of connection lug supports penetrate from the inner side of the lateral ridge of the main frame to the outer side thereof and are fixed by welding. Compared with the prior art in which the pair of connection lug supports are only welded on the inner side of the frame assembly, the structure of the pair of connection lug supports is more solid.
[0013] Preferably, the travel assembly comprise steering mechanisms, braking devices, a front axle, a rear axle and a suspension cylinder mechanisms, wherein the front axle, the rear axle, the suspension cylinder mechanisms, the braking devices and the steering mechanism are respectively connected with the frame assembly; the steering mechanism is arranged within the front axle; the braking devices are respectively arranged at the front and rear axles; the suspension cylinder mechanisms are respectively arranged at the front and rear axles and a pair of electrical wheels is arranged at the rear axle.
[0014] The front axle comprises a pair of front wheels, a front wheel shaft and a pair of front brakes, wherein the pair of front wheels and the pair of front brakes are respectively fitted over the two ends of the front wheel shaft, which can specifically refer to the prior art, and will not be repeated herein. It is worth mentioning that for facilitating machining, effectively reducing the machining accuracy requirement, saving time and improving the structural strength, the present invention optimizes a structure of the front wheel shaft; and in addition, the front wheel shaft in the front axle is optimized to cooperate with the improvement of the front suspension cylinder component, so as to simplify the structure and improve the structural strength. The implementation particularly comprises the following steps. A front suspension cylinder connecting block is additionally arranged within the front wheel shaft, and connected with the front suspension cylinder, a steering arm of the steering mechanism and a rotating shaft in the front wheel shaft respectively. The difference with the prior art lies in that the connecting block is provided with a connecting through hole allowing a piston rod of the front suspension cylinder to penetrate through, the connecting through hole cooperates with the piston rod in a nested manner, and the piston rod is fixed via a fixing component at the opening edge of the connecting through hole. Through the above
2018233039 21 Sep 2018 arrangement, a machining process for integrally arranging a piston rod structure on the connecting block is effectively simplified, and the machining accuracy requirement on the front wheel shaft is greatly reduced. Moreover, assembling and connecting of the front wheel shaft and the front suspension cylinder are facilitated, and difficulty in assembling caused by a machining error of the piston rod is eliminated. Further, due to the front wheel shaft with such a structure, the connecting strength of the front wheel shaft is enhanced; unstable piston rod connection in the prior art is avoided; that is, if the front wheel shaft with such a structure is adopted, once the connection between the piston rod and the front wheel shaft fails, all that is needed is to replace a fixing and connecting component thereof or the piston rod , without disassembling the whole front wheel shaft, so that the service life of the front wheel shaft can be obviously prolonged by using the above-described design. As a preferred embodiment, the connecting block is of a block-shaped structure. The connecting block in the present embodiment is cuboid-shaped; the upper surface of the cuboid is provided with the connecting through hole; and meanwhile, two adjacent side walls perpendicular to the upper surface are provided with fixing and connecting holes for being connected to the steering arm. The distance from the center of the connecting through hole to the wheel surface is predetermined. On one hand, the predetermined distance should meet the condition that the connecting through hole is sufficiently close to the wheel so as to enhance the compactness of the structure; and on the other hand, the predetermined distance should be free from influence of the front suspension cylinder and the wheel hub. The fixing and connecting holes are fixing and connecting threaded holes, and cooperate with fastening bolts to connect the steering arm and the front wheel shaft. By applying the cuboid connecting block in the present embodiment, not only can the steering arm be reliably connected to two adjacent planes to effectively improve the connecting stability and reliability, but also a corresponding steering arm junction surface is further simplified, the machining difficulty for the steering arm junction surface is reduced, and the machining efficiency is improved. In the present embodiment, the fixing and connecting holies not only limited to a threaded hole, and a fastener is not limited to a fastening bolt; instead, they may be other fixing and connecting holes and fasteners
2018233039 21 Sep 2018 which can cooperate with each other and are capable of fixedly connecting the steering arm and the front wheel shaft. It should be noted that the cuboid connecting block in the present invention is just taken as an example; of course, the connecting block may be of other cuboid structures, such as a cube, so long as it can form a connecting plane for connecting the steering arm. Thus, the specific structures of the connecting block do not limit the claimed technical schemes of the present application. In a specific embodiment, a fixing assembly comprises a plurality of bolts and a plurality of fixing through holes formed at the opening edges of the connecting through holes. Accordingly, a snap ring clamped outside the connecting through hole is arranged along the circumference of the piston rod, and provided with threaded holes allowing the bolts to be screwed in. So, the bolt is inserted into the corresponding fixing through hole from the lower portion of the front wheel shaft upwards, and then screwed in the corresponding threaded hole in the piston rod, so as to fixedly connect the front wheel shaft and the piston rod. In the present embodiment, preferably, the fixing through hole adopts a circular opening; of course, the fixing through holes are not limited thereto herein, and may be square holes, polygonal holes and the like, so long as they can allow the corresponding bolts to be inserted to connect the front wheel shaft the piston rod. Therefore, the specific structures of the fixing through holes do not limit the claimed technical schemes of the present application. In order to more effectively fix the piston rod and improve the connecting stability, the fixing through holes fixing through holes are uniformly distributed in the opening edge of connecting through hole. In the above embodiment, the design of the front wheel shaft may be further optimized. The surface where the connecting through hole is formed, of the connecting block is provided with lightening holes, so as to reduce the overall weight of the front wheel shaft while satisfying the structural strength requirement on the front wheel shaft. Specifically, the lightening holes are formed close to the end connected to a front wheel rotating shaft. In the present embodiment, there are three lightening holes which are arranged in parallel. The lightening holes are designed according to the actual strength requirement on the front wheel shaft, so as to enable the front wheel shaft to meet a light weight requirement while meeting the strength requirement. The design of the front wheel shaft in the present invention can be further
2018233039 21 Sep 2018 optimized. The front wheel shaft further comprises a brake caliper bracket integrally arranged with the connecting block and the front wheel rotating shaft. Through such an arrangement, complicated operations for connecting the brake caliper bracket with the front wheel rotating shaft can be eliminated, and the number of bolts for connecting can be substantially reduced. Meanwhile, the strict machining accuracy requirement on a mounting and connecting part when machining the brake caliper bracket can be avoided, and working performances, such as stability and the reliability, of the brake caliper bracket are improved. It should be noted that above orientation terms “left” and “right” refer to extending directions towards two ends of an axis of the front wheel rotating shaft of the front wheel shaft. The orientation term “upper” means one side, when connected with the front suspension cylinder, of the front wheel shaft, namely, the upward direction shown in Figure. It should be understood that the orientation terms are set base d on the drawings of the description, and should not affect the protection scope of the present patent.
[0015] The suspension cylinder mechanism is divided into a front suspension cylinder component and a rear suspension cylinder which are respectively arranged at the front and rear axles. The front suspension cylinder component is configured to support the front axle, specifically the front wheels and the front shafts, from the frame assembly. The function of the front suspension cylinder component is to absorb vibrations when the truck is running on an uneven road surface.
[0016] Preferably, a synchronous steering connecting rod of the steering mechanism in the dump truck of this invention is located directly below the main frame.
[0017] It is worth mentioning that the mining dump truck according to the present invention is improved with respect to a steering connection rod assembly in its steering mechanism. Referring to Figs, and, Fig. shows a schematic section view of the structure along A-A in Fig. The steering connection rod assembly comprises a track rod, two track rod heads and two track rod mounting members, wherein the two track rod heads are mounted on both ends of the track rod by said two track rod mounting members respectively. One end of the track rod mounting member in this embodiment is welded to the track rod, and the other is connected to the track rod head by screws, wherein the
2018233039 21 Sep 2018 track rod mounting member includes a connection rod and a locking nut, and in this case one end of the connection rod is fixed to the track rod by welding and the other is connected to the track rod head by screws with the locking nut screwed on the connection rod to lock the connection rod with the track rod head. Specifically, the track rod is a hollow steel tube and the track rod head is of a casting molded U-shaped structure, wherein the track rod head is provided at its bottom portion with internal threads adapted with external threads on the connection rod so as to effect screw connection with the track rod mounting member. The connection rod is cylindrical with an external threaded portion, onto and with which the locking nut is placed and connected. Furthermore, Preferably, a handle portion is provided on the connection rod, which handle portion is embodied as projection with a hexagonal cross section extending in a circumferential direction of the connection rod and perpendicularly to an axial planar surface of the connection rod. During the adjustment or mounting of the toe-in, this portion is rotated with a wrench to rotate the track rod or the track rod head. Alternatively, this portion is prevented from rotating when it is fixed by a wrench. It can be appreciated the projection on the track rod mounting member is not limited to the above-mentioned structure, if the required bearing strength, processing and assembly technique are achieved. In the track rod mounting member, an end face of the locking nut is abutted against an end face of the track rod to lock the screw connection between the connection rod and track rod. In this embodiment, two side plates of the connection rod are provided at corresponding locations with mounting holes which can be selected as pin holes or bearing holes, etc. in view of various mounting elements, and a steering arm of the steering mechanism is located between said two side plates and rotatable connected to said two side plates by means of the mounting holes, and mounting elements like pin shaft and/or joint bearing is hinged to the track rod head. Preferably, the bottom potion of the track rod head is formed on its interior wall with an extended portion extending towards an opening direction along a U-shaped structure, through which extended portion a threaded hole on the bottom portion which is in screw engagement with the connection rod is passed. That is, the connection rod is inserted through the extended portion, and the extended portion has cross section with an area
2018233039 21 Sep 2018 decreasing towards the opening direction along the U-shaped structure. The extended portion is in transitional connection with the interior wall of said two side plates by smooth curved surfaces so as to enhance the strength and impact resistance of the track rod head. Preferably, in the opening direction of the U-shaped track rod head, the side plate of the track rod head in section is formed in sequence by a first straight portion, a second straight portion, a third straight portion and major arcs, wherein the first and third straight portions are parallel to each other and both at one end connected to the second straight portion and at the other end to the major arc by a smooth curve, with the mounting hole being concentric with the major arc. With such structure, the total weight of the steering tie rod assembly can be controlled within a smaller range, simultaneously while the length of the threaded hole and connection reliability between the connection rod and the track rod head are increased. Now in combination with Fig., the above-mentioned steering tie rod assembly is assembled as follows: firstly, one end of the connection rod is welded to the track rod, secondly, the track rod head is screwed on another end of the connection rod, and then the locking nut is screwed on the connection rod until its end face abuts against the outer wall of the bottom portion of the track rod head. In contrast to the direct screw connection between the track rod head and the track rod in prior art, the track rod in this invention can be in screw connection with two track rod head by the connection rod and then the connection rod and the track rod head are locked by the locking nut, so that the track rod and track rod head can be connected easily, resulting in advantages of reliable connection and easy manufacturing and assembly regarding its structure. Further, one of the said two track rod heads is connected to the connection rod by left-handed screw connection, and the other is connected to a corresponding connection rod by right-handed screw connection. In other words, said two track rod head have opposite thread directions, so that following advantageous effects can be obtained thereby: one hand, the track rod can be screwed with two track rod head simultaneously when the track rod is rotated during assembly, so that the assembly efficiency is enhanced; on the other hand, the length of the steering tie rod assembly can be adjusted rapidly by rotating the track rod for the purpose of adjustment of toe-in.
2018233039 21 Sep 2018 [0018] Preferably, the suspension cylinder mechanism is divided into a front suspension cylinder component and a rear suspension cylinder which are respectively arranged at the front and rear axles. The front suspension cylinder component is configured to support the front axle, specifically the front wheels and the front shafts, from the frame assembly. The function of the front suspension cylinder component is to absorb vibrations when the truck is running on an uneven road surface.
[0019] Different from the prior art, the present invention adopts an independent suspension structure for a heavy-duty dump truck for the first time to greatly improve the comfort and stability. This invention mainly aims to provide a front suspension cylinder component for a mining dump truck. The front suspension cylinder component enables a suspension cylinder to be free from lateral forces, avoids the change of a distance between a front shaft and a rear shaft due to tire bouncing, reduces tire wear and prolongs the service life of the tire.
[0020] In the present embodiment, the front suspension cylinder component comprises a suspension cylinder, a first transverse arm (the upper transverse arm) and the second transverse arm (the lower transverse arm). A top end of the suspension cylinder and the automotive frame assembly of the mining dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; an external end of the upper transverse arm and an upper end of a front wheel shaft of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; an external end of the lower transverse arm and a lower end of the front wheel shaft of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; and an internal end of the upper transverse arm and that of the lower transverse arm are connected with the automotive frame assembly respectively.
[0021] Compared with a candle suspension frame in the prior art, the suspension cylinder and the front wheel shaft are connected movably instead of being fixedly connected, so in a traveling process of the truck, lateral forces in action forces from the ground to tires and additional loads generated by steering and braking are all borne by the upper and lower transverse arms. Therefore, when the truck is in all driving conditions, the suspension cylinder only needs to bear an axial load; that is, the
2018233039 21 Sep 2018 suspension cylinder is of a two-force bar structure, thereby greatly improving the stress condition of the suspension cylinder, prolonging the service life of the suspension cylinder, and reducing routine cylinder maintenance work.
[0022] Compared with a single longitudinal arm suspension frame in the prior art, the transverse arms swing not around the pin shafts arranged at the left and right sides, but upwards and downwards around the pin shafts arranged at the front and rear sides. In addition, changes of a distance between the front wheels caused in a swinging process of the transverse arms are avoided by motion synthesis at the external ends of the upper and lower transverse arms. Therefore, the suspension frame avoids the changes of a distance between a front shaft and a rear shaft caused by tire bouncing and the changes of a distance between a left wheel and a right wheel, thereby reducing tire wear and prolonging the tire service life.
[0023] As a preferred embodiment, an external end of an upper transverse arm is hinged with an upper end of a front wheel shaft via a ball pin. Through such a structure, the external end of the upper transverse arm is ball-hinged with the upper end of the front wheel shaft, so that the external end of the upper transverse arm is capable of moving flexibly in all directions relative to the upper end of the front wheel shaft ; functions that the external end of the upper transverse arm can rotate leftwards or rightwards and swing upwards and rightwards relative to the front wheel shaft are realized; the support flexibility of the upper transverse arm to the front wheel shaft is improved; and the suspension cylinder is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
[0024] lit is conceivable that the upper transverse arm and the upper end of the front wheel shaft may be connected in another manner. For example, they may be connected by a joint bearing.
[0025] In another specific embodiment, an external end of the lower transverse arm and a lower end of the front wheel shaft are connected by a first joint bearing. Since the joint bearing is composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, the external end of the lower transverse arm and the lower end of the front wheel shaft can rotate leftwards or rightwards via the first joint
2018233039 21 Sep 2018 bearing. As the rotating surface is spherical, the external end of the lower transverse arm and the lower end of the front wheel shaft can swing upwards and downwards within a certain angle. Thus, flexible support of the lower transverse arm to the lower end of the front wheel shaft is realized. Of course, the external end of the lower transverse arm and the lower end of the front wheel shaftmay be hinged via a ball pinto rotate leftwards or rightwards and swing upwards and downwards to the greatest extent.
[0026] In another specific embodiment, a bottom end of the suspension cylinder and an external end of the above upper transverse arm are connected by a second joint bearing. A function, same as that of the above first joint bearing, of the second joint bearing is that the bottom end of the suspension cylinder and the external end of the above upper transverse arm are capable of rotating leftwards or rightwards and swinging upwards and downwards, so that the suspension cylinder can rotate flexibly relative to the upper transverse arm. Therefore, the suspension cylinder is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
[0027] Likewise, the bottom end of the suspension cylinder can be hinged with the external end of the upper transverse arm via other hinge members, such as a ball pin, so as to realize the same function.
[0028] In addition, a top end of the suspension cylinder and an automotive frame assembly are connected by a third joint bearing. Same as the above joint bearing s, via the third joint bearing, the top end of the suspension cylinder and the automotive frame are capable of rotating horizontally and swinging upwards and downwards. Similarly, the top end of the suspension cylinder and the automotive frame may be hinged via a ball pin.
[0029] In another specific embodiment, the upper and lower transverse beams are not equal in length. The lengths thereof are acquired by optimizing the minimum wheelbase change and the minimum tire tilting angle change as an objective function in a tire bouncing process. In such a way, the lengths of the upper and lower transverse beams are reasonably optimized, so that changes of wheel base and tire dip angels are greatly reduced in the tire bouncing process and the tire wear is reduced. Therefore, compared
2018233039 21 Sep 2018 with a suspension frame with two equal-length transverse beams, good driving stability of the truck can be ensured by adopting the two unequal-length transverse beams.
[0030] In another specific embodiment, the inner ends of the upper and lower transverse beams are hinged with pin shafts of the automotive frame respectively via copper bushes. In this structure, the pin shafts of the automotive frame are arranged within the copper bushes at the two ends of the upper and lower transverse beams, so that the upper and lower transverse beams can be connected with the automotive frame. In addition, due to less hardness, when in use, the copper bushes will be worn firstly, so in a repair process, all that is needed is to replace the copper bushes. On this basis, a thrust washer may be sandwiched between the copper bush and the automotive frame to avoid direct contact of the transverse beams with the automotive frame, so as to reduce the wear of the automotive frame and the transverse beams.
[0031] Different from the prior art, the present invention adopts an independent suspension structure for a heavy-duty dump truck for the first time to greatly improve the comfort and stability. This invention mainly aims to provide a front suspension cylinder component for a mining dump truck. The front suspension cylinder component enables a suspension cylinder to be free from lateral forces, avoids the change of a distance between a front shaft and a rear shaft due to tire bouncing, reduces tire wear and prolongs the service life of the tire.
[0032] lit should be noted that the orientation term “external end” in this application refers to the left ends of the upper and lower transverse arms and in Figure. The term “internal end” indicates the right ends of the upper and lower transverse arms in Figure. The terms “front” and “rear” refer to a truck traveling direction and the opposite direction thereof, and “left” and “right” refer to the “left” and “right” directions sensed in a cab. It should be understood that these terms are set base d on a driver’s habits and the drawings of the description.
[0033] Iln the present embodiment, the front suspension cylinder component comprises a suspension cylinder, a first transverse arm (the upper transverse arm) and the second transverse arm (the lower transverse arm). A top end of the suspension cylinder and the automotive frame assembly of the mining dump truck are capable of rotating leftwards
2018233039 21 Sep 2018 or rightwards and swinging upwards and downwards; an external end of the upper transverse arm and an upper end of a front wheel shaft of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; an external end of the lower transverse arm and a lower end of the front wheel shaft of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; and an internal end of the upper transverse arm and that of the lower transverse arm are connected with the automotive frame assembly respectively.
[0034] Compared with a candle suspension frame in the prior art, the suspension cylinder and the front wheel shaft are connected movably instead of being fixedly connected, so in a traveling process of the truck, lateral forces in action forces from the ground to tires and additional loads generated by steering and braking are all borne by the upper and lower transverse arms. Therefore, when the truck is in all driving conditions, the suspension cylinder only needs to bear an axial load; that is, the suspension cylinder is of a two-force bar structure, thereby greatly improving the stress condition of the suspension cylinder, prolonging the service life of the suspension cylinder, and reducing routine cylinder maintenance work.
[0035] Compared with a single longitudinal arm suspension frame in the prior art, the transverse arms swing not around the pin shafts arranged at the left and right sides, but upwards and downwards around the pin shafts arranged at the front and rear sides. In addition, changes of a distance between the front wheels caused in a swinging process of the transverse arms are avoided by motion synthesis at the external ends of the upper and lower transverse arms. Therefore, the suspension frame avoids the changes of a distance between a front shaft and a rear shaft caused by tire bouncing and the changes of a distance between a left wheel and a right wheel, thereby reducing tire wear and prolonging the tire service life.
[0036] As a preferred embodiment, an external end of an upper transverse arm is hinged with an upper end of a front wheel shaft via a ball pin. Through such a structure, the external end of the upper transverse arm is ball-hinged with the upper end of the front wheel shaft, so that the external end of the upper transverse arm is capable of moving flexibly in all directions relative to the upper end of the front wheel shaft ;
2018233039 21 Sep 2018 functions that the external end of the upper transverse arm can rotate leftwards or rightwards and swing upwards and rightwards relative to the front wheel shaft are realized; the support flexibility of the upper transverse arm to the front wheel shaft is improved; and the suspension cylinder is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
[0037] It is conceivable that the upper transverse arm and the upper end of the front wheel shaft may be connected in another manner. For example, they may be connected by a joint bearing.
[0038] In another specific embodiment, an external end of the lower transverse arm and a lower end of the front wheel shaft are connected by a first joint bearing. Since the joint bearing is composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, the external end of the lower transverse arm and the lower end of the front wheel shaft can rotate leftwards or rightwards via the first joint bearing. As the rotating surface is spherical, the external end of the lower transverse arm and the lower end of the front wheel shaft can swing upwards and downwards within a certain angle. Thus, flexible support of the lower transverse arm to the lower end of the front wheel shaft is realized. Of course, the external end of the lower transverse arm and the lower end of the front wheel shaft may be hinged via a ball pin to rotate leftwards or rightwards and swing upwards and downwards to the greatest extent.
[0039] In another specific embodiment, a bottom end of the suspension cylinder and an external end of the above upper transverse arm are connected by a second joint bearing. A function, same as that of the above first joint bearing, of the second joint bearing s that the bottom end of the suspension cylinder and the external end of the above upper transverse arm are capable of rotating leftwards or rightwards and swinging upwards and downwards, so that the suspension cylinder can rotate flexibly relative to the upper transverse arm. Therefore, the suspension cylinder is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
[0040] Likewise, the bottom end of the suspension cylinder can be hinged with the external end of the upper transverse arm via other hinge members, such as a ball pin, so
2018233039 21 Sep 2018 as to realize the same function.
[0041] In addition, a top end of the suspension cylinder and an automotive frame assembly are connected by a third joint bearing. Same as the above joint bearing s, via the third joint bearing, the top end of the suspension cylinder and the automotive frame are capable of rotating horizontally and swinging upwards and downwards. Similarly, the top end of the suspension cylinder and the automotive frame may be hinged via a ball pin.
[0042] In another specific embodiment, the upper and lower transverse beams are not equal in length. The lengths thereof are acquired by optimizing the minimum wheelbase change and the minimum tire tilting angle change as an objective function in a tire bouncing process. In such a way, the lengths of the upper and lower transverse beams are reasonably optimized, so that changes of wheel base and tire dip angels are greatly reduced in the tire bouncing process and the tire wear is reduced. Therefore, compared with a suspension frame with two equal-length transverse beams, good driving stability of the truck can be ensured by adopting the two unequal-length transverse beams.
[0043] In another specific embodiment, the inner ends of the upper and lower transverse beams are hinged with pin shafts of the automotive frame respectively via copper bushes. In this structure, the pin shafts of the automotive frame are arranged within the copper bushes at the two ends of the upper and lower transverse beams, so that the upper and lower transverse beams can be connected with the automotive frame. In addition, due to less hardness, when in use, the copper bushes will be worn firstly, so in a repair process, all that is needed is to replace the copper bushes. On this basis, a thrust washer may be sandwiched between the copper bush and the automotive frame to avoid direct contact of the transverse beams with the automotive frame, so as to reduce the wear of the automotive frame and the transverse beams.
[0044] The rear axle comprises a rear wheel component, a component and a rear axle casing member (namely, a rear axle casing pull road assembly), wherein the rear wheels in the rear wheel component include two tires mounted simultaneously to the electrical wheel pairs through the rear rims, or specifically, the rear wheels in the rear wheel component include two tires mounted simultaneously to the hubs through wedge blocks.
2018233039 21 Sep 2018
The rear wheel casing component is connected with the electrical wheel pairs as a core connecting and supporting part. Thus, the whole rear axle is formed.
[0045] It is worth mentioning that a rear axle casing member originally provided in the present invention is additionally arranged between the electrical wheel pairs in the rear axle. The electrical wheel pairs are connected with the main frame through the rear axle casing member. The rear axle casing is connected to the tail end of the main frame via the first and the second connecting members. And accordingly, both lateral ridges of the main frame are provided with a pair of connection lugs through which the rear axle casing is respectively connected with the two lateral ridges and between which a transverse beam is arranged and integrally welded with the connection lugs. In addition, a rear axle housing is arranged outside the rear axle housing. One end of the first connecting portion is ball-hinged with an upper portion of the rear axle housing, and the other end thereof with the main frame. The second connecting portion comprises two pull rods; one end of the pull rod is ball-hinged with the rear axle housing, and the other end thereof with the connection lug of the automotive frame. As a preferred embodiment, a part of the electrical wheel is built in the rear axle casing.
[0046] Another objective of this invention is to provide a travel drive device of the dump truck, namely, a pair of electrical wheels, which are driven in an AC-DC-AC manner. The prior art can be referred to for the specific working principle of the electrical wheels. However, the difference lies in that a rotation torque of the motor is input from the sun gear after multiple stages of speed reduction and torque rising by the reducer, with an outer ring gear being locked, and is output from the planet gear carrier, which is capable of transmitting a larger torque to the integrally formed hub, and thereby driving the wheel to rotate.
[0047] To achieve the above mentioned objective, the electrical wheel comprises: a motor, which is arranged at one axial end of a main shaft and is fixed relative to the frame assembly; a rotating shaft, which non-rotatably cooperates with an output shaft of the motor via a coupling, penetrates through an inner circumference of the main shaft, and protrudes from the other axial end of the main shaft; a reducer, which is arranged at the other end side of the main shaft, is sandwiched between the rotating shaft and the
2018233039 21 Sep 2018 wheel, and transmits power from the rotating shaft to the wheel; and a hub, which is connected with the reducer, is integrally formed and is mounted at an outer circumference of the main shaft. The rotational torque of the motor is input from the sun gear after multiple stages of speed reduction and torque rising by the reducer, with an outer ring gear being locked, and is output from the planet gear carrier, which is capable of transmitting a larger torque to the integrally formed hub, and thereby driving the wheel to rotate.
[0048] Preferably, the hub is rotatably mounted on the outer circumference of the main shaft through a bearing.
[0049] Preferably, the reducer comprises a first planet gear mechanism and a second planet gear mechanism.
[0050] Preferably, the first planet gear mechanism and the second planet gear mechanism are positioned sequentially along a radial direction of the main shaft away from the main shaft.
[0051] Preferably, the first planet gear mechanism is meshed with the rotating shaft.
[0052] Preferably, in order to enhance the load bearing strength of the whole reducer, optimize the load uniformity thereof and facilitate the disassembly and maintenance thereof, the first planet gear mechanism and the second planet gear mechanism are positioned sequentially along an axial direction of the main shaft and away from the motor.
[0053] Preferably, the first planet gear mechanism comprises a first sun gear, a first planet gear meshed with the first sun gear, a first planet carrier which rotatably supports the first planet gear through a bearing, and a first ring gear meshed with the first planet gear.
[0054] Preferably, the second planet gear mechanism comprises a second sun gear, a second planet gear meshed with the second sun gear, a second planet gear pin shaft meshed with the second planet gear through a bearing, and a second planet gear carrier fixed with the second planet gear, the second planet gear being sandwiched between the second sun gear and the first ring gear.
[0055] Preferably, in order to facilitate a stable connection between the main shaft and
2018233039 21 Sep 2018 the motor, the drive device further comprises a bridge base sandwiched between the motor and the main shaft and connected thereto.
[0056] Further, to avoid uneven stress, four bridge base, there are four bridge bases which are uniformly distributed along the circumferential direction of the output shaft of the motor.
[0057] Further, the bridge base is integrally arranged with the main shaft.
[0058] Preferably, in order to brake the wheel, the drive device further comprises a brake mounted between the main shaft and the hub.
[0059] Preferably, one end of the brake is fixed at the main shaft as a stationary end of the brake, the other end thereof is integrally connected with the hub through a bolt and rotates along with the hub.
[0060] Further, the brake is a wet brake.
[0061] Preferably, the brake comprises a brake fixed base, a piston and a friction plate sandwiched between the brake fixed base and the piston, wherein the brake fixed base is integrally fixed with the hub via a bolt, and the piston and the main shaft are displaceable fixed along the axial direction of the main shaft.
[0062] Preferably, the friction plate comprises at least one movable friction plate and at least one fixed friction plate, which are alternately arranged, wherein both radial sides of the movable friction plate and the fixed friction plate are provided with friction particles with high friction coefficients respectively, and the movable friction plate and the fixed friction plate are rotatably arranged with spacing there between.
[0063] Preferably, the movable friction plate is integrally fixed with the brake fixed base; the fixed friction plate is integrally fixed with the piston.
[0064] Preferably, in order to better cool the reducer with lubrication oil so as to reduce the heat produced during a transmission process, the drive device further comprises a cooling member which provides lubricating oil for the main shaft and the reducer.
[0065] Preferably, the drive device further comprises a sensor which is arranged within the reducer and configured to monitor a temperature of the reducer.
[0066] Further, the cooling member comprises: a fuel sucking pipe mounted at the main shaft and configured to eject the lubrication oil into the reducer, and a fuel return
2018233039 21 Sep 2018 pipe configured to recycle the lubrication oil; a first cavity and a second cavity which communicate with each other and are surrounded by the first ring gear, a fixed gear wheel and the second planet gear carrier; and a third cavity surrounded by the main shaft, the hub and the brake, wherein the fuel sucking pipe keeps communication with the first cavity, the fuel return pipe keeps communication with the third cavity, and the second and third cavities keeps communication with the first cavity respectively. In this way, it is convenient to eject the lubrication oil into the reducer to lubricate and cool a plurality of pairs of meshed gears in the reducer.
[0067] Further, in order to implement automatic circulation in the cooling circuit, the truck further comprises a hydraulic pump which provides pressure to the lubrication oil, wherein lubrication oil pressurized by the hydraulic pump keeps communication with the oil inlet pipe.
[0068] Preferably, the sensor is connected with a control system configured to control a cooling circuit of the whole truck.
[0069] Preferably, in order to increase a carrying capacity of the truck, the truck further comprises a rim connected between the wheel and the hub, wherein the rim is fitted over the hub and is integrally fixed with the hub.
[0070] Preferably, the rim comprises: an outer rim and an inner rim which are configured to fixedly cooperate with the wheel, and a rim intermediate ring sandwiched between the outer rim and the inner rim, wherein, in the axial direction of the main shaft and away from the motor, the inner rim, the rim intermediate ring and the outer rim are connected sequentially in a pressing manner.
[0071] Preferably, the rim further comprises a wedge integrally fixed with the main shaft, wherein the wedge is sandwiched between the rim and the hub with its thickness being gradually decreased along the axial direction of the main shaft, and extends towards the motor.
[0072] The present invention provides a rear-axle suspension system of a large mining dump truck, the system comprising: a rear axle housing, the frame assembly and the suspension connecting member. The rear axle housing is connected to the frame assembly of the dump truck via the suspension connecting member (the difference with
2018233039 21 Sep 2018 the prior art lies in that the suspension connecting member is integrated with the rear suspension cylinder component), and comprises a lateral automotive frame, a transverse beam at an upper rear portion of the automotive frame and a transverse beam at a lower rear portion thereof and the like. The suspension connecting member comprises an upper suspension portion and a lower suspension portion. The lower suspension portion comprises two lower pull rods; one end of the lower pull rod is ball-hinged to a lower front portion of the rear axle housing, and the other end thereof to the transverse beam at a lower rear portion of the frame assembly. The upper suspension portion comprises two upper pull rods and two rear suspension cylinders; each end of the upper pull rod is ball-hinged to an upper portion of the rear axle housing, and the other end thereof to the frame assembly. One end of each rear suspension cylinder is ball-hinged to the rear portion of the rear axle housing, and the other end thereof to the transverse beam at an upper rear portion of the automotive frame. The rear suspension cylinder provides elasticity for the rear axle to relieve vibration of the truck.
[0073] The terms front and rear used in this embodiment are described with a travel direction of the truck as a reference. The lower front portion of the rear axle housing is the front and lower position of the rear axle housing. In case the pull-down road is connected at the lower front portion of the rear axle housing, then after the assembly of the rear axle housing and the transverse beam at the lower rear portion are mounted, the front portion of the lower pull rod is at a high position while the rear portion thereof at a low position. Most part of the rear axle housing is located above a position where the rear axle housing is connected with the pull-down road, which helps to raise a roll center of the dump truck. A higher roll center helps to reduce rotary vibration and tremble caused when a truck axle is rotated around a longitudinal axis. With such a layout, a driving force or a braking force of the rear wheel can be transmitted to the frame assembly via the upper suspension portion on one hand, and can be transmitted to the frame assembly via two lower pull rods connected with the transverse beam at the lower rear portion on the other hand. Points of action for two forces are provided between the transverse beam at the lower rear portion and the lower pull rod, which optimizes the stress of the transverse beam at the lower rear portion
2018233039 21 Sep 2018 either from the aspect of a force direction and or from the aspect of a force magnitude, and avoids damages caused to the transverse beam at the lower rear portion when a large driving force or braking force of the dump truck is applied to a point of action in the transverse beam at the lower rear portion. Moreover, the lower pull rod is simple in structure, is not only capable of transmitting force stably but also is capable of reducing the space occupied by the suspension connecting member.
[0074] Specifically, the rear axle housing is provided with two first mounting bases configured to mount the lower pull rod, the first mounting base comprising two oppositely arranged ear plates which are connected with a rear axle housing body respectively. A revolving shaft is inserted between the two ear plates, and is mounted with a joint bearing whose inner ring is connected with the revolving shaft and whose outer ring with the lower pull rod. The lower pull rod and the rear axle housing are ball-hinged via the joint bearing. Via relative rotation between the inner ring and outer ring of the joint bearing, the lower pull rod rotates relative to the rear axle housing. As the lower pull rod bears heavier weight of the rear axle, the first mounting base provides the lower pull rod with a stable mounting foundation and an appropriate rotational range via the two ear plates and a horizontal revolving shaft. In this way, the lower pull rod is fixedly connected to the rear axle housing. In addition, the connecting ends of the lower pull rods and the transverse beam at the lower rear portion are provided with two opposite ear plates. The rear axle housing further comprises a joint bearing and a revolving shaft horizontally inserted into the two ear plates. The inner ring of the joint bearing is connected with the revolving shaft and the outer ring thereof is configured to connect with the transverse beam at the lower rear portion. In this way, one end of the lower pull rod which connects the inner ring of the joint bearing and the other end thereof which connects the inner ring of the joint bearing have different structures. The former is a round hole provided in the lower pull rod body to cooperate with the joint bearing; and the latter are two ear plates arranged in the lower pull rod body to cooperate with the revolving shaft. One end, which is provided with the ear plate, of the pull-down road has a relatively larger dimension so as to further improve the overall strength of the lower pull rod.
2018233039 21 Sep 2018 [0075] In case an upper pull rod is connected with the upper portion of the rear axle housing, then the driving force or braking force of the rear wheel may be transmitted to the frame assembly via the two upper pull rods. The driving force or braking force of the rear wheel is acted to the frame assembly via four force bearing points, two connecting points of the lower pull rod and the transverse beam at the lower rear portion as well as two connecting points of the upper pull rod and the automotive frame, which further optimizes an overall force bearing status of the automotive frame and improves the connecting reliability of the rear axle. Of course, the upper suspension portion of other forms, such as a tripod structure form, may also be adopted; one apical comer of the tripod is ball-hinged with the rear axle housing 1 and other two apical corners thereof are connected with the automotive frame via a revolution joint; the tripod may also be of other forms provided it is enabled to keep the structure stable.
[0076] Specifically, the rear axle housing is provided with two second mounting bases configured to mount the upper pull rod, and the connecting ends of the upper pull rod and the rear axle housing are provided with two oppositely arranged ear plates between which a revolving shaft is inserted; the revolving shaft is mounted with an inner ring of a joint bearing and the second mounting base is connected with an outer ring of the joint bearing. The upper pull rod is ball-hinged with the rear axle housing via a joint bearing and gains appropriate rotational range via the above mentioned structures such as the revolving shaft, the joint bearing and the ear plate etc.; namely, two revolving shaft mounted at two second mounting bases deviate from the axis of the rear axle housing by predetermined angles respectively along the clockwise and anti-clockwise directions, so that the two upper pull rods are open along a traveling direction under a natural status, or the two upper pull rods are open from the back to the front; the two revolving shafts mounted at two first mounting bases are axially arranged along the rear axle housing so that two lower pull rods are parallel with each other along a traveling direction under a natural status. The connecting ends of the upper pull rod and the automotive frame are arranged with two opposite ear plates, and further comprise a revolving shaft vertically inserted between two ear plates and a joint bearing which connects the revolving shaft. An inner ring of the joint bearing is connected with the revolving shaft and an outer ring
2018233039 21 Sep 2018 thereof is connected with the automotive frame. In addition, both ends of the upper pull rod are provided with two opposite ear plates; one ear plate is configured to connect the rear axle housing and the other one to connect the automotive frame; and the ear plate connecting the rear axle housing is vertically arranged and cooperates with a horizontal revolving shaft; and the ear plate connecting the automotive frame is horizontally arranged and cooperates with a vertical revolving shaft. In this way, both ends of the upper pull rods are provided with ear plates and have relatively larger dimensions, thereby having higher strength and improving the connecting stability; and as the revolving shafts which cooperates with two pairs of ear plates are vertically and horizontally arranged respectively, the arrangements are different, thus the arrangement directions of two pairs of ear plates are also different, which helps to take advantage of the rotational freedom of the joint bearing, improve an anti-torsion capacity of the pull rod and better balance side tipping differences at both sides of a truck.
[0077] In this way, the upper pull rod and the lower pull rod are not arranged in parallel with each other; four of them are enabled to form a stable structure with the rear axle housing and the frame assembly. The upper pull rod also acts as a transverse rod in an existing suspension system in a truck; that is, it can restrict a truck from tipping-over caused by an over tipping when the truck turns.
[0078] Two rear suspension cylinders are ball-hinged with the rear portion of the rear axle housing. In this way, the rear suspension cylinders are connected with the rear axle housing via two acting positions and they, together with the upper pull rods and the lower pull rods, disperse the weight on rear axle springs to the rear axle housing. The weight is transmitted to the rear axle via six force bearing points so that the frame assembly and the rear axle housing have better force bearing performance. Further, the upper pull rods and the lower pull rods may be provided with lightening holes so that they can stably transmit forces while have smaller weights.
[0079] The rear axle housing further comprises a cylindrical casing body (namely, a steel cylinder) which is made of wound steel plates welded together, two rear suspension cylinder supports, two lower pull rod supports and two end rings which are arranged to be coaxial with the steel cylinder and are fixedly connected with two end portions of the
2018233039 21 Sep 2018 steel cylinder, and a upper pull rod support arranged on the steel cylinder. The steel cylinder is provided with a manhole A, a cable hole S and an air passage hole O. Specifically, the rear axle housing is provided with two air passage holes O and a manhole A. Two air passage holes O and a manhole are symmetrically arranged relative to the center line of the steel cylinder 1. In this way, an influence of a processing hole on the rigidity of the steel cylinder may be reduced, such that the strength of the steel cylinder along its circumferential direction is basically the same so as to avoid premature breaking due to excessively low local strength, thereby extending the service life of the steel cylinder. In addition, there are also two cable holes S in the rear axle housing. As the apertures of the cable hole S and the air passage hole O are smaller compared with that of the manhole A, the position of the cable hole S is arranged to close to that of the air passage hole O in this embodiment, so that the strength of the steel cylinder along its circumferential direction is basically the same so as to avoid premature breaking due to excessively low local strength, thereby extending the service life of the steel cylinder. Of course, on the basis of meeting with the requirements on operation as well as processing and assembling technology requirements, the quantities and arrangement positions of the manhole A, the cable hole S and the air passage hole O in the rear axle housing may be adjusted according to the structure features of the mining dump truck. Two rear suspension cylinder supports of the rear axle housing are symmetrically and fixedly connected with two end rings relative to the steel cylinder. Specifically, each rear suspension cylinder support comprises two vertical slabs arranged in a parallel manner and welded to the outer circumference wall of the end ring. And each vertical slab has an arcuate welding surface which fits with the outer circumference wall of the end ring; pin holes are arranged at corresponding positions of two vertical slabs; the rear suspension cylinder support is hinged between two vertical slabs via a pin shaft which fits with the pin hole; likewise, two lower pull rod supports are fixedly connected with two end rings respectively and symmetrically relative to the steel cylinder. It can be seen by continuing referring to Figure that two rear suspension cylinder supports and two lower pull rod supports are symmetrically arranged relative to the center line of the steel cylinder in this embodiment, thereby further optimizing the
2018233039 21 Sep 2018 force bearing capacity of the rear axle housing to extend its service life. In addition, to further improve the strength of the rear suspension cylinder, a reinforcing rib is additionally provided between the two vertical slabs in this embodiment. In detail, the reinforcing rib is a curved plate, which is bent and shaped by a steel plate along a length direction of the vertical slab. Likewise, two lower pull rod supports are respectively arranged on two end rings symmetrically relative to the steel cylinder. Specifically, each lower pull rod support comprises two vertical slabs arranged in a parallel manner and welded to the outer circumference wall of the end ring. And each vertical slab has an arcuate welding surface which fits with the outer circumference wall of the end ring. Pin holes are arranged at corresponding positions of the two vertical slabs. The lower pull rod support is hinged between the two vertical slabs via a pin shaft which fits with the pin hole. In order to further improve the strength of the lower pull rod, a reinforcing rib plate is additionally provided between the two vertical slabs in this embodiment. In detail, the reinforcing rib plate is a curved plate which is bent and shaped by a steel plate along a length direction of the vertical slab. The end ring in this embodiment is forged into a forged ring. Compared with the cylindrical steel cylinder or an end ring rolled and welded or manufactured with other mechanical processing technologies, the strength and anti-impact performance of the forged ring are superior than the prior art, thereby optimizing the overall force bearing capacity of the real axle housing. Further, in order to improve the strength and anti-impact performance of the real axle housing, an inner wall of the end ring is provided with a plurality of reinforcing ribs. The plurality of reinforcing ribs is sequentially welded along the center line of the end ring, and each reinforcing rib is a circular reinforcing rib. It shall be noted that the reinforcing rib is integrated with the end ring and it is manufactured by lathing after forging. It can be understood that adoption of a circular reinforcing rib makes the stress on the end ring uniform, thereby further optimizing its mechanical properties. Of course, on the basis of meeting with the requirements on enhancing the strength of the end ring and on its anti-impact function, processing and assembling technologies, the reinforcing rib of the end ring may be of other structures familiar to those skilled in the art. It shall be noted that the two end rings are both welded to the steel cylinder in this embodiment. The
2018233039 21 Sep 2018 connection has high reliability, and meanwhile ensures that the overall weight of the rear axle housing is relatively lighter, so that the dead-weight of the mining dump truck is relatively lighter, and a lighter dead-weight of the mining dump truck necessarily enables a larger carrying capacity. Of course, on the basis of meeting with the requirements on reliable connection between the end ring and the steel cylinder and on assembling technologies, the end ring and the steel cylinder may also be fixedly connected via a thread connection, a rivet connection or an adhesive connection. The upper pull rod support comprises two vertical slabs alternately arranged and welded on the outer circumference wall of the steel cylinder. Pin holes are provided at corresponding positions in the two vertical slabs. The upper pull rod is hinged between the two vertical slabs via a pin shaft which fits with the pin hole. In order to further enhance the strength of the upper pull rod support, a reinforcing rib is additionally arranged in this embodiment. The reinforcing rib is welded with the two vertical slabs and the rear axle housing. Specifically, along a direction pointed by the upper pull rod towards the rear axle housing, the cross-sectional area of the vertical slab is increased progressively. A profile of the vertical slab comprises a top arcuate line segment, a bottom arcuate line segment and two sections of far right straight line segments which connect with the top and bottom arcuate line segments. Such an arrangement, on the basis of satisfying a strength of connecting the upper pull rod support and the upper pull rod, is capable of reducing a weight of the upper pull rod support. As the sum of the dead-weight of the mining dump truck and its carrying capacity is a constant value, a lighter upper pull rod support will necessarily reduce the dead-weight of the mining dump truck and then increase its carrying capacity. Further, an area of the welding surface of the vertical slab shall be increased as much as possible so as to increase the connecting strength and reliability there between. In addition, the profile of the vertical slab may also comprise a top arcuate line segment, a bottom arcuate line segment and two sections of far right smooth curve segments which connect the top and bottom arcuate line segments. Similarly, such an arrangement, on the basis of satisfying a strength of connecting the vertical slab support and the upper pull rod, is capable of reducing a weight of the upper pull rod support on one hand; as the sum of the
2018233039 21 Sep 2018 dead-weight of the mining dump truck and its carrying capacity is a constant value, a lighter upper pull rod support will necessarily reduce the dead-weight of the mining dump truck and then increase its carrying capacity; on the other hand, an area of the welding surface of the vertical slab shall be increased as much as possible so as to increase the connecting strength and reliability there between, thereby reducing stress concentration on the vertical slab by connecting the top arcuate segment and the bottom arcuate segment via smooth curve segments and then improving its anti-impact properties. It shall be noted that the rear suspension cylinder, the lower pull rod support and the upper pull rod support are all welded and assembled by plates in this embodiment; and therefore, they have simple structures, low manufacturing cost and relatively high strength and anti-impact performance. In addition, the welding connection is of high reliability and meanwhile ensures that the overall weight of the rear axle housing is relatively lighter so that the dead-weight of the mining dump truck is relatively lighter; and a relatively lighter dead-weight of the mining dump truck necessarily enables a larger carrying capacity. Of course, on the basis of meeting with the requirements on reliable connection between the end ring and the steel cylinder and on assembling technologies, the end ring and the steel cylinder may also be fixedly connected via a thread connection, a rivet connection or an adhesion connection.
[0080] In conclusion, compared with the steel cylinder which is rolled and welded with a steel plate adopting the prior art, the rear axle housing in this embodiment adopts an assembled combination of the steel cylinder and an end ring, thereby greatly improving the strength and anti-impact properties of the rear axle housing. In addition, two rear suspension cylinder supports and two lower pull rod supports are symmetrically and fixedly connected with the end ring respectively. Structures bearing smaller external impact loads, such as the manhole A, the air passage hole O, the cable hole S and the like, are arranged on the steel cylinder. The rear axle housing is compact in structure, dispersed in stress and has good mechanical properties.
[0081] It is worth mentioning that improvements are made to the above-mentioned upper pull rod support in this invention. The upper pull rod support comprises two pairs of vertical slabs welded on a peripheral wall of the rear axle hosing. The two vertical
2018233039 21 Sep 2018 slabs are respectively arranged corresponding to the two upper pull rods of the mining dump truck and hinged via a pin shaft. A bottom surface of each vertical slab is welded with the outer circumference wall of the rear axle housing. Specifically, the bottom surface is an arcuate surface which fits with the outer circumference wall of the rear axle housing. Specifically, the two pairs of vertical slabs include a first vertical slab, a second vertical slab, a third vertical slab and a fourth vertical slab, wherein the first vertical slab and the second vertical slab are arranged in parallel and their bottom surfaces are welded on the outer circumference wall of the rear axle housing; likewise, the third vertical slab and the fourth vertical slab 4 are arranged in parallel and their bottom surfaces are welded on the outer circumference all on the rear axle housing. During assembly, relative positions of the two pairs of vertical slabs are adjusted according to specific positions of the two upper pull rods of the mining dump truck, and then they are sequentially welded via the arcuate welding surfaces. Then, pin holes S are processed at corresponding positions of each pair of vertical slabs. At last, a upper pull rod is inserted between two vertical slabs and hinged with the two vertical slabs via a pin shaft which fits with the pin hole S. Obviously, the upper pull rod support in this embodiment adopts a structural design that a plurality of vertical slabs is welded with the rear axle housing, which disperses stress and has high strength. In addition, all welding surfaces of the vertical slabs and the outer circumference wall are arcuate surfaces. Thus, the welding positioning is simple and accurate, and an assembly efficiency is high. Further, along the direction pointed by the upper pull rod towards the rear axle housing, the cross-sectional area of the vertical slab increases progressively. Specifically, the profile of the vertical slab comprises a top arcuate line segment, a bottom arcuate line segment and two sections of far right straight line segments which connect the top and bottom arcuate line segments. Such an arrangement, on the basis of satisfying the strength for connecting the vertical slab support and the upper pull rod, is capable of reducing a weight of the upper pull rod support on one hand; as the sum of the dead-weight of the mining dump truck and its carrying capacity is a constant value, a lighter upper pull rod support will necessarily reduce the dead-weight of the mining dump truck and then increase its carrying capacity; on the other hand, an area of the
2018233039 21 Sep 2018 welding surface of the vertical slab shall be increased as much as possible so as to increase their connecting strength and reliability.
[0082] In another specific embodiment, the profile of the vertical slab comprises a top arcuate line segment, a bottom arcuate line segment and two sections of far right smooth curve segments which connect the top and bottom arcuate line segments. Such an arrangement, on the basis of satisfying the strength of connecting the vertical slab support and the upper pull rod, is capable of reducing a weight of the upper pull rod support on one hand; as the sum of the dead-weight of the mining dump truck and its carrying capacity is a constant value, a lighter upper pull rod support will necessarily reduce the dead-weight of the mining dump truck and then increase its carrying capacity; on the other hand, an area of the welding surface of the vertical slab shall be increased as much as possible so as to increase their connecting strength and reliability. In addition, the top and bottom arcuate segments are connected via a smooth curve segment in this solution, which is capable of reducing stress concentration on the vertical slab and then improving its anti-impact properties. It shall be noted that all vertical slabs are axially symmetrical relative to a diameter of the pin hole S, which have symmetrical structures, uniform stress and good mechanical properties. It can be understood that on the basis of meeting with the requirements on carrying capacity and on processing and assembling technologies, the vertical slabs may also be of other shapes which are different from that in this solution. Further, the vertical slab is connected with a forged ring which is concentric with the pin hole S. A diameter of the forged ring is less than that of the pin hole S; namely, the pin shaft is connected with the vertical slab via a forged ring. Under general conditions, the forged ring is made of steel with high-strength and high wear resistance. The rigidity and thickness of the forged ring are greater than those of the vertical slab. The pin shaft cooperates with the vertical slab via the forged ring, which is capable of improving the supporting strength. The pin shaft cooperates with the forged ring, which is capable of reducing an abrasion loss of the vertical slab on one hand and, on the other hand, lowering the requirements on wear resistance and relevant performance parameters of the vertical slab, and then controlling costs of manufacturing the upper pull rod supports. Of course, on the basis of meeting
2018233039 21 Sep 2018 with the requirements on strengths and wear resistances, the pin hole S may cooperate with the pin shaft. It can be seen by continuing referring to Figure that the upper pull rod support further comprises a reinforcing rib plate which is welded together with the outer circumference wall of the rear axle housing and four vertical slabs. In order to better understand the structure of the reinforcing rib plate, please also refer to the Figures. Specifically, the bottom surface of the reinforcing rib plate is welded on the outer circumference wall of the rear axle housing, and is welded with four vertical slabs via side plate surfaces. In a preferred embodiment, the reinforcing rib plate is bent or rolled to form an arcuate segment which fits with the side planes and top surface of the vertical slab, and is welded therewith. During assembly, relative positions of the two pairs of vertical slabs are adjusted according to specific positions of the two upper pull rods of the mining dump truck. And then the two pairs of vertical slabs are sequentially welded via the arcuate welding surfaces. And the reinforcing rib plate is welded at corresponding positions on the rear axle housing and the vertical slab. Then, pin holes S are processed at corresponding positions of each pair of vertical slabs. At last, an upper pull rod is inserted between two vertical slabs and hinged with the two vertical slabs via a pin shaft which fits with the pin hole S. It can be understood that after the upper pull rod support is additionally provided with the reinforcing rib plate, it may further improve the strength of the upper pull rod support and then further enhance the reliability of the connection between the rear axle housing and the upper pull rod. It shall be noted that, along a direction pointed by the upper pull rod towards the rear axle housing, the cross-sectional area of the reinforcing rib plate increases progressively. Specifically, a profile of the reinforcing rib plate under an unfolded status comprises a top straight line segment, a bottom straight line segment and two sections of smooth curve segments. The above mentioned structural design has various advantages and it is capable of reducing a weight of the upper pull rod support on one hand; as the sum of the dead-weight of the mining dump truck and its carrying capacity is a constant value, a lighter upper pull rod support will necessarily reduce the dead-weight of the mining dump truck and then increase its carrying capacity; on the other hand, an area of the welding surface of the vertical slab shall be increased as much as possible so as to
2018233039 21 Sep 2018 increase the connecting strength there between. In addition, the top and bottom arcuate segments are connected via a smooth curve segment in this solution, which is capable of reducing stress concentration on the vertical slab and then improving its anti-impact properties. It shall be noted that the whole upper pull rod support is welded and assembled with plates. Compared with connecting methods such as bolt connections and rivet connections, a welded connection is capable of reducing the weight of the upper pull rod support and meanwhile controlling the manufacturing cost. As for the mining dump truck, as the sum of the its dead-weight and carrying capacity is a constant value, the welded connecting method adopted in this solution can reducing the weight of the upper pull rod support, and it will necessarily reduce the dead-weight of the whole mining dump truck and then achieve an objective of increasing the carrying capacity.
[0083] Preferably, the cab assembly comprises a platform assembly, a cab, a control center and a multi-stage ladder. The cab in this embodiment is subject to complying with the existing security and stability standards. For its working principles and basic structures, please refer to the prior art. The mining dump truck in this embodiment and improvements on the prior art are described below in detail; therefore other details are not discussed herein. The cab and the control center are mounted on the platform assembly. The ladder comprises a flexible stair to allow a driver to get in and out of the cab, and a maintenance stair to allow a maintenance person to maintain the mining dump truck.
[0084] The cab assembly comprises a platform assembly, a cab and control center as well as a multi-stage ladder. The cab assembly in this embodiment is subject to current safety and stability standards, with reference to operational principles and basic structures in prior art. Following detailed description is made with respect to the improvement of the mining dump truck according to the present invention over the prior art, otherwise no more details. The cab and the control center are all provided on the platform assembly, and the ladder comprises a flexible ladder for a driver to step on and off the cab and a service ladder for a service staff to check and repair the mining dump truck.
[0085] The cab comprises a cab frame, a skin cover provided thereon and a cab bottom
2018233039 21 Sep 2018 plate. In addition, a cab operation console and a control station are provided, wherein the operation console is located between the cab and the seat, and the control station is located above the driver’s head.
[0086] The cab frame comprises a top frame, a bottom frame and front beams on both sides in front of the cab as well as rear beams on both sides behind the cab, wherein the front beams and rear beams are connected to the top frame and the bottom frame, respectively. An operation table frame can be arranged in front of the cab frame, i.e. operation devices like steering wheel and central control system in the cab can be mounted on the operation table frame. The top frame comprises a horizontal frame and an inclined frame connected thereto, wherein the horizontal frame comprises two top longitudinal beams and two top transverse beams, and the bottom frame particularly comprises four bottom longitudinal beams and two bottom transverse beams. The top and bottom frames form an enclosed frame respectively. A basic profile of the cab frame is enclosed by the front beams on both sides in front of the cab and the rear beams on both side behind the cab as well as the top and bottom frames, wherein a space between two front beams corresponds to the front end face of the cab, and thus the front windshield is located between two front beams, and a space between two rear beams corresponds to the rear end face of the cab. The cab frame is provided at its both sides with a front support beam and a rear support beam located between the top and bottom frames, wherein the front support beam is adjacent to the front beam and the rear support beam is adjacent to the rear beam, so that the strength and vertical loading capability of the cab frame are enhanced. The cab door is located between the front support beam and the rear support beam, and an inclined front support beam is provided between the front support beam and the front beam, while an inclined rear support beam is provided between the rear support beam and the rear beam. The positions of the inclined front support beam and the inclined rear support beam keep consistent so as to guarantee loading balance. The inclined front support beam and the inclined rear support beam are located beneath the cab frame, so that enough space in front of the cab can be remained for placing the front windshield so as to secure wide visual field. The inclined support beams are provided for enhancing vertical and horizontal loading capability and bending
2018233039 21 Sep 2018 resistance of the support beams, i.e. the inclined support beams and the front beam (or rear beam) as well as the bottom frame, resulting in a triangular support structure. Obviously, the provision of the support beam and inclined support beam, particularly the provision of the inclined support beam, enhances the strength of the cab frame in this embodiment and thus substantially the stability thereof, so as to prevent deformation and improve driving safety when the mining dump truck is subject to roll over, turn over or falling objects. Furthermore, such configuration is not interfered with the arrangement of the door. The operation table frame is located between the front beam and the front support beam and adjacent to downside of the cab, so that devices mounted thereto can be operated easily by the driver. In this case, one end of the inclined front support beam can be located at the connection between the front beam and the bottom frame, the other end is located between the connection between the operation table frame and the front support beam. Such configuration of the support beams can improve the strength of respective connections and stability of the frame. As a preferable solution, the cross section area of the operation table frame or the front beam can be less than that of other beams of the cab frame. In other words, a profile section with a smaller cross section can be used for the operation table frame and the front beam, while a profile section with a larger cross section can be used for the support beam, the inclined support beam, the rear beam and the bottom and top frames. The operation table frame and the front beam correspond to the operation area and major visible area of the cab which belong to non-safety protection area in which a profile section with a smaller cross section can be adopted for providing a wider visual area, and otherwise a profile section with a larger cross section can be adopted for guarantee the strength of the cab frame. Further, a slope is provided in the front of the cab, so that the front beam can include the front inclined beam a and the front vertical beam b connected there to Preferably, a second front transverse beam can be provided, both ends of which are connected to the connection between the front inclined beam a and front vertical beam b on both sides to enhance the stability of the front frame. In fact, base d on the visual need in front of the cab and the position of the non-safety protection area (based on the arrangement of the operation table and required safety class lower than in other portions), the top ends of the front
2018233039 21 Sep 2018 beams on both sides can be connected to the top longitudinal beam of the top frame by means of two short longitudinal beam, and a first front transverse beam is provided between the top ends of the front beams on both sides, so that a portion of the cab frame corresponding to the operation table frame can be designed with a lower strength. In this case, the operation table frame can be provided at a position at which the front inclined beam a is connected to the front vertical beam b, so as to effect reasonable spatial arrangement and reliable connection of respective beams. It can be appreciated that the inclined front support beam in this embodiment is inclined upward from front to rear side. In fact, the inclined front support beam can be inclined downward from front to rear side. For example, the inclined front support beam is connected at its one end to the connection between the operation table frame and the front beam, and at the other end to the connection between the front support beam and the bottom frame. As mentioned above, the non-safety protection area is located in front of the cab, while the inclined front support beam is inclined downward from front to rear side to facilitate the structural stability of the front end face, and so the inclined front support beam is inclined upward from front to rear side to facilitate the structural stability behind the front support beam so as to achieve the required safety class. It can be conceived that although inclined support beams which can be inclined in two directions are provided simultaneously, an inclined support beam which is only inclined in one direction can achieve certain required customary stability and controlled cost. In addition, the inclined rear support beam at one end is located at the connection between the rear support beam and the bottom frame, in a similar principle to that for the above-mentioned inclined front support beam, by means of which the strength of the connection can be enhanced. Accordingly, the inclined rear support beam at the other end is located on the lower end of the rear beam. In addition, a horizontal frame can be provided on the top inclined support beam, two ends of which are connected to two upper diagonal comers of the horizontal frame. The top inclined support beam and the inclined front support beam as well as the inclined rear support beam have the same configuration effect, i.e. to effect stable supporting and guarantee frame strength. In addition, the top inclined support beam provided on the top frame can effectively avoid damage due to turn-over and
2018233039 21 Sep 2018 falling objects. The top frame comprises a horizontal frame and an inclined frame connected thereto which is located behind the cab frame. The longitudinal frame in the shown top frame comprises a top longitudinal frame and a top inclined longitudinal beam. The cab rear end has an inclined slope, so that the space between the cab and the compartment is enlarged. The interference of the cab with the compartment roof can be avoided by designing the cab rear end with a slope, so as to prevent damage to the cab due to loaded cargo. The cab frame can be provided at both sides with enforcement beams, which at its one end is connected to the rear support frame and at its other end is located at the connection between the inclined frame and the rear beam. Preferably, the enforcement beam is arranged horizontally, and because the inclined frame forms a top inclined longitudinal beam, the rear support beam, the enforcement beam and the inclined beam of the inclined frame form a substantially triangular structure to resist effectively the vertical force, perpendicular force and bending for providing stability of the rear upper end of the cab, while its rear lower end is supported stably by the inclined rear support beam, the rear support beam and the rear beam, so that high stability behind the whole cab can be obtained.
[0087] The cab bottom plate comprises an upper bottom plate and a lower bottom plate which are arranged in sequence from top to toe, i.e. the upper bottom plate is more adjacent to the driver. A foam layer is produced by means of a foaming process between the lower bottom plate and the upper bottom plate, and separation plates can be provided between the lower bottom plate and the upper bottom plate, between two of which separation plates wiring grooves for receiving wires or cables and in particular the wires or cables for the cab bottom plate are formed. The lower bottom plate is welded to the cab basic frame and the cab cover skin, while the upper bottom plate is welded to the cab cover skin and the front and rear cab frames, with the separation plates welded to the lower bottom plate and the upper bottom plate. After be welded, the lower bottom plate, the upper bottom plate, the cab cover skin and the separation plates form a closed foaming space. In this case, foaming agents can be introduced into this space for foaming and producing the required foam layer. The welding fixation is reliable and stable for ensuring that the foaming agents would not enter into the wiring grooves
2018233039 21 Sep 2018 between two separation plates. In this case, openings can be provided at the locations of the lower bottom plate corresponding to the wiring grooves, which openings correspond to the central control system in the cab. After the openings are provided at these locations, wires or cables within the wiring grooves can be directly connected to the central control system there-above for facilitating wire connection. The wiring grooves function on one hand to protect wires or cables from being damaged from outside, and on the other hand can effect orderly arrangement of wires or cables so as to avoid tangle, misconnection, etc. due to disorder. In addition, the interior of the cab looks more tidy and beautiful when the wires or cables are hiding within the wiring grooves. A few support posts can be provided between the lower bottom plate and the upper bottom plate for connecting said two bottom plates with each other to ensure the stability of the cab bottom plate as a whole and also to avoid generating noises caused by the deformation of the upper bottom plate when an operator moves in the cab. A set of support posts are provided directly adjacent to the outside of the separation plates, i.e. three support posts are provided at the outside of two separation plates respectively. The foam layer is a plastic layer with a micro-porous structure possessing a great capability of absorbing heat and sound so as to achieve a great effect of heat solation and noise reduction. The foam layer connects firmly the upper bottom plate with the lower bottom plate, so that the whole bottom plate has a more stable structure and increased strength. The foam layer has a better damping performance to enhance the comfort sense for a walking driver.
[0088] The cab operation console is used for arranging in collection the related control devices in the dump truck so as to avoid misoperation of similar control devices and improve operational simplicity, convenience, accuracy and comfort. The cab operation console is provided at its front end with an inclined surface which is in connection with the top planar surface of the cab operation console, wherein a vertical plane in which the connection edge there between is located separates the cab operation console into an inclined operational area and a main operational area. That is, the vertical area of the cab operation console in which the inclined surface is located is the inclined operational area, whereas the vertical area of the cab operation console in which the connected top
2018233039 21 Sep 2018 planar surface is located is the main operational area. The inclined operational area and the main operational area are provided for receiving related groups of control devices respectively. The main operational area can avoid the operator’s frequent operation actions such as turning-around and bending over caused by distributing arrangement of the operation devices, so as to reduce the operational difficulty and enhance operational efficiency. The cab operation console can be in form of a rectangular platform having a longitudinal direction along the front to rear direction of the mining dump truck between the driver seat and the passenger seat, comprising the inclined operational area located on the front end of the top surface of the rectangular platform (the vertical area of the cab operation console in which the inclined surface is located, i.e. formed by cutting of one upper edge of the rectangular platform), the main operational area (i.e. the vertical area of the cab operation console in which the top surface connected to the inclined operational area), an auxiliary operation area connected to the rear end of the main operational area and storage area connected to the rear end of the auxiliary operation area. The rectangular platform is a convenient structure which can be produced easily with lower cost. The main operational area is provided at its top planar surface with a mounting opening for a steering lever, a mounting opening for a load braking button and a mounting opening for lifting operation lever at a side adjacent to the driver seat side, for mounting the steering lever, the load braking button and lifting operation lever respectively, when the mining dump truck carries out the lifting operation. In this way, three control devices which are strongly associated with frequent operations of lifting and dumping are collectively mounted in the main operational area of the cab operation console so as to carry out the lifting and dumping operations more precisely and efficiently. At the handle of the lifting operation lever is provided a self-lock control button, depending on pressing of which or not, it can be determined whether pulling the lifting operation lever functions or not. A mounting opening for an emergency stop button, a power interface and a mounting opening for window rising button are provided on the inclined surface of the inclined operational area for mounting the emergency stop button, the power and the window rising button. The positions for the mounting opening for an emergency stop button, the power interface and the mounting opening for window
2018233039 21 Sep 2018 rising button are configured so as to enhance their operational simplicity and convenience more effectively. Particularly, as shown the mounting opening for an emergency stop button, the power interface and the mounting opening for window rising button as shown are arranged in sequence from a lower inclined end to an upper inclined end of the inclined surface. In addition, the inclined surface of the inclined operational area has an included angle in the range off to ° with respect to the horizontal surface so as to effect the function of the inclined operational area. In addition, the main operational area at one side is provided in sequence with the auxiliary operation area and the storage area as shown. In this case, the cab operation console has in sequence the inclined operational area, the main operational area, the auxiliary operation area and the storage area, wherein the planar surface of the auxiliary operation area is provided with a mounting opening for a mirror heating button and a small storage box for operator to place articles conveniently so as to expand the function of the cab operation console and provide mounting positions for non-frequently used buttons, so that disturbance to important frequently used control devices is effectively avoided. The storage area is of a box-shaped structure and at its top planar surface provided with a box cover, by means of which the box can be opened and closed, so that various articles e.g. service tools can be placed in order, resulting in full use of the space at the rear end of the cab.
[0089] The cab control station is used for placing devices in the mining dump truck cab, comprising a control box which at its top portion is attached to the top portion of the cab front end, i.e. above the driver on the front side. The control box has a bottom plate parallel to the top plate of the cab and is converged from a side adjacent to the front cab windshield to a side adjacent to the driver. That is, said bottom plate has a smaller transverse size at the side adjacent to the drive and a larger transverse size at the side adjacent to the front cab windshield. In this way, it is possible to avoid that the driver’s operational visual field is shielded by both sides of the cab control station and thus the driver’s operation in the cab is disturbed. Further, the cab control station can have an increased longitudinal size so as to facilitate the driver’s operation with respect to operation devices on said cab control station in a simple and convenient way, so that the potential danger to the safety caused by the driver’s operation when leaning forward.
2018233039 21 Sep 2018
In this embodiment Preferably, the control box has a trapezoidal bottom plate, wherein the short side of the trapezoidal bottom plate is adjacent to the driver, and the long sides adjacent to the front cab windshield. The trapezoidal bottom plate is converged from the side adjacent to the front cab windshield to the side adjacent to the driver, so that reasonable and effective use of the interior space of the cab can be effected. A side plate connected to the short side of the trapezoidal bottom plate is the first control plate which can be removable connected to adjacent side plates and bottom plate. In particular, the first control plate can be removable fixed to the edges of the side plate and bottom plate by screws. When corresponding device components are mounted on the first control plate, the first control plate can be firstly detached for such mounting. The first control plate can also be detached for conducting service work with respect to the devices and related components in said control box. Two side plates of the bottom plate function as the second control plate and the third control plate respectively, wherein each of the second control plate and the third control plate is provided with an operation opening, which at its outer edge is removable connected to a cover plate for closing and opening said openings. The bottom plate, side plates and cover plate are all provided with connection recesses for receiving related devices, so that related device components can be fixed in an effective and reliable way. For example, a loudspeaker can be mounted on the bottom plate, other components like radio can be mounted on the first control plate, and switch buttons and the like for some components are mounted on the cover plate of the second and third control plates. The bottom plate is welded to the cab side walls at an edged adjacent to the front cab wind shield, and the upper edge of the side plates are welded to the cab roof plate. In this way, the bottom plate, the side plates and the cab side walls enclose and form the control box so as to obtain reasonable arrangement of the space in the cab and enhance its compactness and practicability.
[0090] As a preferable embodiment, the flexible ladder comprises a rigid paddle and side plates connected to both sides of the paddle. The side plates are rigid and hinged to both sides of the paddle, with a central axis of the two hinged members extending in a front to rear direction of the flexible ladder. With such structure, the flexible ladder has a great stiffness in the vertical direction and a great comfort for stepping on due to the
2018233039 21 Sep 2018 rigid side plates and the paddle. In addition, because the paddle is hinged to the side plates, i.e. a deformable parallelogram is formed between the paddle and side plates. The flexible ladder can be deformed freely in a lateral direction during movement of the vehicle, ensuring that the flexible ladder could not be damaged because of absorption of impact energy when the vehicle moves fast, i.e. it has very little lateral stiffness, a great impact resistance and a long service life. The above-mentioned paddle is provided at its end portion with a first mounting sleeve, and the side plate connected correspondingly to the paddle is provided at its end portion with a second mounting sleeve, wherein the first and second mounting sleeves, form a shaft sleeve when jointing together, in which axle sleeve is mounted a pin shaft. The paddle and side plate is hinged by means of the pin shaft, so that a link pair is formed with a simple structure and lower cost, and it is easy to operate the mounting and detachment process. Further, the above-mentioned pin shaft is provided at both ends with an elastic retaining washer. Said elastic retaining washer can prevent the movement of the pin shaft in the front and back direction during the use of the flexibility ladder, so as to further ensure the reliability of the hinge connection of the paddle to the side plate.
[0091] As a preferable embodiment, the service ladder comprises an upper ladder, a lower ladder, a connecting member and a retaining member for enhancing effectively the safety, comfort and stability of the service ladder during the service procedure, so that a service man can climb to a higher frame by means of the service ladder for service works, when the components of the mining dump truck is under service. The connecting member connects the upper ladder with the lower ladder so as to enable the lower ladder to be retracted into overlap with the upper ladder. In this way, the mining dump truck can be allowed during operation to retract the lower ladder into the upper ladder to lift away from the ground, so that damage to the lower ladder due to impact by the obstacles on the ground can be avoided effectively, ensuring the lower ladder has a reliable operation life. The lower ladder is deployed with respect to the upper ladder under the action of the connecting member, when the mining dump truck is under service, so that the service man can climb, from the lower ladder to the upper ladder, up to the top for overhauling related components. Further, the connection of the connecting member with
2018233039 21 Sep 2018 the upper ladder and lower ladder can be further configured for effecting the retracting movement of the lower ladder into the overlapping position with the upper ladder. The connecting member is fixed to a transverse steel tube at the lower end of the upper ladder and is hinged to the lower ladder, so that the lower ladder can be retracted by rotation with respect to the upper ladder. That is, when the mining dump truck is under service and the lower ladder is retracted, the lower ladder can be rotated about the link pair, and the lower end is lifted and rotated about to fold into a position parallel to the upper ladder, so as to bring the lower ladder into overlap with the upper ladder in a simple and convenient way. In order to retract the lower ladder in a simple and convenient way and make the retracted service ladder compact and occupy a small space, the lower ladder has a width dimension less than the width of the upper ladder between its two interior sides, so that the retracted lower ladder is overlapped within the central portion of the upper ladder. The connecting member comprises a base and two opposite lugs projected from the base. In this case, the base is provided with a fixation hole for passing through and attachment of the steel tube of the upper ladder, while each lug is provided with a lug link hole and said two lug link holes are opposite to each other. In the meantime, the lower ladder is provided with a lower ladder link hole. When the lower ladder is connected with the connecting member, a rotation shaft is passed through two lug link holes and the lower ladder link hole, so that the lower ladder and the upper ladder are rotatable connected. Further, a distance of the center of the lug link hole to the base portion of the lug is larger than a distance of the lower ladder link hole to the connection end edge of the lower ladder. When the lower ladder is deployed to the position parallel to the upper ladder, the lower ladder abuts against the retaining member fixed to the connection between the upper ladder and the lower ladder, so as to avoid occurrence of a shaking and unstable lower ladder when it is affected by a force generated by climbing up of the service man. With such retaining member of this structure, a simple structure and simple and convenient manufacturing can be achieved and the deployed position of the lower ladder can be defined fully effectively. The retaining block is formed integrally with the connecting member. The surface of the retaining block comprises a section of inclined surface and a section of planar surface.
2018233039 21 Sep 2018
When the retaining block is formed integrally with the connecting member, the retaining block is extended from the base of the connecting member along a deploying direction of the lower ladder, with a lower end edge of its inclined surface flush with the surface of the surface of the base that is in connection with the lug. That is, a lower end edge of the inclined surface is flush with the base portion of the lug, while its higher end edge is joined with the edge of the planar surface. As to the above-mentioned planar surface, the lower ladder abuts against it to effectively define its position in the deployed state of the lower ladder, whereas the above-mentioned inclined surface can provide the lower ladder with a rotation space, so as to avoid blockade to the connection end of the lower ladder during the retracting and deploying process of the lower ladder. The service ladder further comprises a hand rest, and the upper ladder, the lower ladder and the hand rest are all formed by welding steel tubes. Due to the larger stiffness of a steel tube, deformation resistance can be enhanced effectively so as to guarantee the safety during stepping on of the service man and prolong effectively the service life of the service ladder. The upper ladder and the hand rest are welded integrally so as to define precisely the position of the hand rest and the upper ladder, reduce the mounting work load of the service ladder and enhance the mounting efficiency. In order to reliably fix the position of the lower ladder during retracting movement, the service ladder further comprises a clamp connection assembly. Preferably, the clamp connection assembly comprises two pairs of clamp connection holes and clamp pins inserted into each pair of clamp connection holes, wherein one clamp connection hole of each pair of clamp connection holes is provided on the upper ladder, the other is provided on the lower ladder. When the upper ladder is overlapped with the lower ladder, the openings of the clamp connection holes in each pair are opposite to each other. Then the clamp pin is inserted through two clamp connection holes to connect the lower ladder with the upper ladder, so that the retraction position of the lower ladder is defined effectively and stably.
[0092] More preferably, the platform assembly comprises a platform, a control cabinet, a resistance box, an air filter, a handrail and a fire extinguishing device, wherein the control cabinet, the resistance box, the air filter, the handrail and the fire extinguishing device are all mounted on the platform. The whole platform is welded by ordinary 45
2018233039 21 Sep 2018 seamless steel tubes, which ensures the strength and rigidity of the platform. The platform, together with the main frame, adopts an installation and positioning device having a split bearing pedestal to ensure the reliability and security of the platform and facilitate the installation and positioning of the platform. Lifting lugs are arranged surrounding the platform so as to facilitate the installation and disassembly of the platform.
[0093] The cab assembly comprises a platform assembly, a cab and control center as well as a multi-stage ladder. The cab assembly in this embodiment is subject to current safety and stability standards, with reference to operational principles and basic structures in prior art. Following detailed description is made with respect to the improvement of the mining dump truck according to the present invention over the prior art, otherwise no more details. The cab and the control center are all provided on the platform assembly, and the ladder comprises a flexible ladder for a driver to step on and off the cab and a service ladder for a service staff to check and repair the mining dump truck.
[0094] The cab comprises a cab frame, a skin cover provided thereon and a cab bottom plate. In addition, a cab operation console and a control station are provided, wherein the operation console is located between the cab and the seat, and the control station is located above the driver’s head.
[0095] The cab frame comprises a top frame, a bottom frame and front beams on both sides in front of the cab as well as rear beams on both sides behind the cab, wherein the front beams and rear beams are connected to the top frame and the bottom frame, respectively. An operation table frame can be arranged in front of the cab frame, i.e. operation devices like steering wheel and central control system in the cab can be mounted on the operation table frame. The top frame comprises a horizontal frame and an inclined frame connected thereto, wherein the horizontal frame comprises two top longitudinal beams and two top transverse beams, and the bottom frame particularly comprises four bottom longitudinal beams and two bottom transverse beams. The top and bottom frames form an enclosed frame respectively. A basic profile of the cab frame is enclosed by the front beams on both sides in front of the cab and the rear beams on
2018233039 21 Sep 2018 both side behind the cab as well as the top and bottom frames, wherein a space between two front beams corresponds to the front end face of the cab, and thus the front windshield is located between two front beams, and a space between two rear beams corresponds to the rear end face of the cab. The cab frame is provided at its both sides with a front support beam and a rear support beam located between the top and bottom frames, wherein the front support beam is adjacent to the front beam and the rear support beam is adjacent to the rear beam, so that the strength and vertical loading capability of the cab frame are enhanced. The cab door is located between the front support beam and the rear support beam, and an inclined front support beam is provided between the front support beam and the front beam, while an inclined rear support beam is provided between the rear support beam and the rear beam. The positions of the inclined front support beam and the inclined rear support beam keep consistent so as to guarantee loading balance. The inclined front support beam and the inclined rear support beam are located beneath the cab frame, so that enough space in front of the cab can be remained for placing the front windshield so as to secure wide visual field. The inclined support beams are provided for enhancing vertical and horizontal loading capability and bending resistance of the support beams, i.e. the inclined support beams and the front beam (or rear beam) as well as the bottom frame, resulting in a triangular support structure. Obviously, the provision of the support beam and inclined support beam, particularly the provision of the inclined support beam, enhances the strength of the cab frame in this embodiment and thus substantially the stability thereof, so as to prevent deformation and improve driving safety when the mining dump truck is subject to roll over, turn over or falling objects. Furthermore, such configuration is not interfered with the arrangement of the door. The operation table frame is located between the front beam and the front support beam and adjacent to downside of the cab, so that devices mounted thereto can be operated easily by the driver. In this case, one end of the inclined front support beam can be located at the connection between the front beam and the bottom frame, the other end is located between the connection between the operation table frame and the front support beam. Such configuration of the support beams can improve the strength of respective connections and stability of the frame. As a preferable solution, the cross
2018233039 21 Sep 2018 section area of the operation table frame or the front beam can be less than that of other beams of the cab frame. In other words, a profile section with a smaller cross section can be used for the operation table frame and the front beam, while a profile section with a larger cross section can be used for the support beam, the inclined support beam, the rear beam and the bottom and top frames. The operation table frame and the front beam correspond to the operation area and major visible area of the cab which belong to non-safety protection area in which a profile section with a smaller cross section can be adopted for providing a wider visual area, and otherwise a profile section with a larger cross section can be adopted for guarantee the strength of the cab frame. Further, a slope is provided in the front of the cab, so that the front beam can include the front inclined beam a and the front vertical beam b connected thereto preferably. A second front transverse beam can be provided, both ends of which are connected to the connection between the front inclined beam a and front vertical beam b on both sides to enhance the stability of the front frame. In fact, base d on the visual need in front of the cab and the position of the non-safety protection area (based on the arrangement of the operation table and required safety class lower than in other portions), the top ends of the front beams on both sides can be connected to the top longitudinal beam of the top frame by means of two short longitudinal beam, and a first front transverse beam is provided between the top ends of the front beams on both sides, so that a portion of the cab frame corresponding to the operation table frame can be designed with a lower strength. In this case, the operation table frame can be provided at a position at which the front inclined beam a is connected to the front vertical beam b, so as to effect reasonable spatial arrangement and reliable connection of respective beams. It can be appreciated that the inclined front support beam in this embodiment is inclined upward from front to rear side. In fact, the inclined front support beam can be inclined downward from front to rear side. For example, the inclined front support beam is connected at its one end to the connection between the operation table frame and the front beam, and at the other end to the connection between the front support beam and the bottom frame. As mentioned above, the non-safety protection area is located in front of the cab, while the inclined front support beam is inclined downward from front to rear side to facilitate the
2018233039 21 Sep 2018 structural stability of the front end face, and so the inclined front support beam is inclined upward from front to rear side to facilitate the structural stability behind the front support beam so as to achieve the required safety class. It can be conceived that although inclined support beams which can be inclined in two directions are provided simultaneously, an inclined support beam which is only inclined in one direction can achieve certain required customary stability and controlled cost. In addition, the inclined rear support beam at one end is located at the connection between the rear support beam and the bottom frame, in a similar principle to that for the above-mentioned inclined front support beam, by means of which the strength of the connection can be enhanced. Accordingly, the inclined rear support beam at the other end is located on the lower end of the rear beam. In addition, a horizontal frame can be provided on the top inclined support beam, two ends of which are connected to two upper diagonal comers of the horizontal frame. The top inclined support beam and the inclined front support beam as well as the inclined rear support beam have the same configuration effect, i.e. to effect stable supporting and guarantee frame strength. In addition, the top inclined support beam provided on the top frame can effectively avoid damage due to turn-over and falling objects. The top frame comprises a horizontal frame and an inclined frame connected thereto which is located behind the cab frame. The longitudinal frame in the shown top frame comprises a top longitudinal frame and a top inclined longitudinal beam. The cab rear end has an inclined slope, so that the space between the cab and the compartment is enlarged. The interference of the cab with the compartment roof can be avoided by designing the cab rear end with a slope, so as to prevent damage to the cab due to loaded cargo. The cab frame can be provided at both sides with enforcement beams, which at its one end is connected to the rear support frame and at its other end is located at the connection between the inclined frame and the rear beam. Preferably, the enforcement beam is arranged horizontally, and because the inclined frame forms a top inclined longitudinal beam, the rear support beam, the enforcement beam and the inclined beam of the inclined frame form a substantially triangular structure to resist effectively the vertical force, perpendicular force and bending for providing stability of the rear upper end of the cab, while its rear lower end is supported stably by the inclined
2018233039 21 Sep 2018 rear support beam, the rear support beam and the rear beam, so that high stability behind the whole cab can be obtained.
[0096] The cab bottom plate comprises an upper bottom plate and a lower bottom plate which are arranged in sequence from top to toe, i.e. the upper bottom plate is more adjacent to the driver. A foam layer is produced by means of a foaming process between the lower bottom plate and the upper bottom plate, and separation plates can be provided between the lower bottom plate and the upper bottom plate, between two of which separation plates wiring grooves for receiving wires or cables and in particular the wires or cables for the cab bottom plate are formed. The lower bottom plate is welded to the cab basic frame and the cab cover skin, while the upper bottom plate is welded to the cab cover skin and the front and rear cab frames, with the separation plates welded to the lower bottom plate and the upper bottom plate. After be welded, the lower bottom plate, the upper bottom plate, the cab cover skin and the separation plates form a closed foaming space. In this case, foaming agents can be introduced into this space for foaming and producing the required foam layer. The welding fixation is reliable and stable for ensuring that the foaming agents would not enter into the wiring grooves between two separation plates. In this case, openings can be provided at the locations of the lower bottom plate corresponding to the wiring grooves, which openings correspond to the central control system in the cab. After the openings are provided at these locations, wires or cables within the wiring grooves can be directly connected to the central control system there-above for facilitating wire connection. The wiring grooves function on one hand to protect wires or cables from being damaged from outside, and on the other hand can effect orderly arrangement of wires or cables so as to avoid tangle, misconnection, etc. due to disorder. In addition, the interior of the cab looks more tidy and beautiful when the wires or cables are hiding within the wiring grooves. A few support posts can be provided between the lower bottom plate and the upper bottom plate for connecting said two bottom plates with each other to ensure the stability of the cab bottom plate as a whole and also to avoid generating noises caused by the deformation of the upper bottom plate when an operator moves in the cab. A set of support posts are provided directly adjacent to the outside of the separation plates, i.e.
2018233039 21 Sep 2018 three support posts are provided at the outside of two separation plates respectively. The foam layer is a plastic layer with a micro-porous structure possessing a great capability of absorbing heat and sound so as to achieve a great effect of heat isolation and noise reduction. The foam layer connects firmly the upper bottom plate with the lower bottom plate, so that the whole bottom plate has a more stable structure and increased strength. The foam layer has a better damping performance to enhance the comfort sense for a walking driver.
[0097] The cab operation console is used for arranging in collection the related control devices in the dump truck so as to avoid misoperation of similar control devices and improve operational simplicity, convenience, accuracy and comfort. The cab operation console is provided at its front end with an inclined surface which is in connection with the top planar surface of the cab operation console, wherein a vertical plane in which the connection edge there between is located separates the cab operation console into an inclined operational area and a main operational area. That is, the vertical area of the cab operation console in which the inclined surface is located is the inclined operational area, whereas the vertical area of the cab operation console in which the connected top planar surface is located is the main operational area. The inclined operational area and the main operational area are provided for receiving related groups of control devices respectively. The main operational area can avoid the operator’s frequent operation actions such as turning-around and bending over caused by distributing arrangement of the operation devices, so as to reduce the operational difficulty and enhance operational efficiency. The cab operation console can be in form of a rectangular platform having a longitudinal direction along the front to rear direction of the mining dump truck between the driver seat and the passenger seat, comprising the inclined operational area located on the front end of the top surface of the rectangular platform (the vertical area of the cab operation console in which the inclined surface is located, i.e. formed by cutting of one upper edge of the rectangular platform), the main operational area (i.e. the vertical area of the cab operation console in which the top surface connected to the inclined operational area), an auxiliary operation area connected to the rear end of the main operational area and storage area connected to the rear end of the auxiliary operation
2018233039 21 Sep 2018 area. The rectangular platform is a convenient structure which can be produced easily with lower cost. The main operational area is provided at its top planar surface with a mounting opening for a steering lever, a mounting opening for a load braking button and a mounting opening for lifting operation lever at a side adjacent to the driver seat side, for mounting the steering lever, the load braking button and lifting operation lever respectively, when the mining dump truck carries out the lifting operation. In this way, three control devices which are strongly associated with frequent perations of lifting and dumping are collectively mounted in the main operational area of the cab operation console so as to carry out the lifting and dumping operations more precisely and efficiently. At the handle of the lifting operation lever is provided a self-lock control button, depending on pressing of which or not, it can be determined whether pulling the lifting operation lever functions or not. A mounting opening for an emergency stop button, a power interface and a mounting opening for window rising button are provided on the inclined surface of the inclined operational area for mounting the emergency stop button, the power and the window rising button. The positions for the mounting opening for an emergency stop button, the power interface and the mounting opening for window rising button are configured so as to enhance their operational simplicity and convenience more effectively. Particularly, as shown the mounting opening for an emergency stop button, the power interface and the mounting opening for window rising button as shown are arranged in sequence from a lower inclined end to an upper inclined end of the inclined surface. In addition, the inclined surface of the inclined operational area has an included angle in the range of3 to with respect to the horizontal surface so as to effect the function of the inclined operational area. In addition, the main operational area at one side is provided in sequence with the auxiliary operation area and the storage area as shown. In this case, the cab operation console has in sequence the inclined operational area, the main operational area, the auxiliary operation area and the storage area, wherein the planar surface of the auxiliary operation area is provided with a mounting opening for a mirror heating button and a small storage box for operator to place articles conveniently so as to expand the function of the cab operation console and provide mounting positions for non-frequently used buttons, so that disturbance to
2018233039 21 Sep 2018 important frequently used control devices is effectively avoided. The storage area is of a box-shaped structure and at its top planar surface provided with a box cover, by means of which the box can be opened and closed, so that various articles e.g. service tools can be placed in order, resulting in full use of the space at the rear end of the cab.
[0098] The cab control station is used for placing devices in the mining dump truck cab, comprising a control box which at its top portion is attached to the top portion of the cab front end, i.e. above the driver on the front side. The control box has a bottom plate parallel to the top plate of the cab and is converged from a side adjacent to the front cab windshield to a side adjacent to the driver. That is, said bottom plate has a smaller transverse size at the side adjacent to the drive and a larger transverse size at the side adjacent to the front cab windshield. In this way, it is possible to avoid that the driver’s operational visual field is shielded by both sides of the cab control station and thus the driver’s operation in the cab is disturbed. Further, the cab control station can have an increased longitudinal size so as to facilitate the driver’s operation with respect to operation devices on said cab control station in a simple and convenient way, so that the potential danger to the safety caused by the driver’s operation when leaning forward. In this embodiment Preferably, the control box has a trapezoidal bottom plate, wherein the short side of the trapezoidal bottom plate is adjacent to the driver, and the long sides adjacent to the front cab windshield. The trapezoidal bottom plate is converged from the side adjacent to the front cab windshield to the side adjacent to the driver, so that reasonable and effective use of the interior space of the cab can be effected. A side plate connected to the short side of the trapezoidal bottom plate is the first control plate which can be removable connected to adjacent side plates and bottom plate. In particular, the first control plate can be removable fixed to the edges of the side plate and bottom plate by screws. When corresponding device components are mounted on the first control plate, the first control plate can be firstly detached for such mounting. The first control plate can also be detached for conducting service work with respect to the devices and related components in said control box. Two side plates of the bottom plate function as the second control plate and the third control plate respectively, wherein each of the second control plate and the third control plate is provided with an operation opening,
2018233039 21 Sep 2018 which at its outer edge is removable connected to a cover plate for closing and opening said openings. The bottom plate, side plates and cover plate are all provided with connection recesses for receiving related devices, so that related device components can be fixed in an effective and reliable way. For example, a loudspeaker can be mounted on the bottom plate, other components like radio can be mounted on the first control plate, and switch buttons and the like for some components are mounted on the cover plate of the second and third control plates, the bottom plate is welded to the cab side walls at an edged adjacent to the front cab windshield, and the upper edge of the side plates are welded to the cab roof plate. In this way, the bottom plate, the side plates and the cab side walls enclose and form the control box so as to obtain reasonable arrangement of the space in the cab and enhance its compactness and practicability.
[0099] As a preferable embodiment, the flexible ladder comprises a rigid paddle and side plates connected to both sides of the paddle. The side plates are rigid and hinged to both sides of the paddle, with a central axis of the two hinged members extending in a front to rear direction of the flexible ladder. With such structure, the flexible ladder has a great stiffness in the vertical direction and a great comfort for stepping on due to the rigid side plates and the paddle. In addition, because the paddle is hinged to the side plates, i.e. a deformable parallelogram is formed between the paddle and side plates. The flexible ladder can be deformed freely in a lateral direction during movement of the vehicle, ensuring that the flexible ladder could not be damaged because of absorption of impact energy when the vehicle moves fast, i.e. it has very little lateral stiffness, a great impact resistance and a long service life. The above-mentioned paddle is provided at its end portion with a first mounting sleeve, and the side plate connected correspondingly to the paddle is provided at its end portion with a second mounting sleeve, wherein the first and second mounting sleeves, form a shaft sleeve when jointing together, in which axle sleeve is mounted a pin shaft. The paddle and side plate is hinged by means of the pin shaft, so that a link pair is formed with a simple structure and lower cost, and it is easy to operate the mounting and detachment process. Further, the above-mentioned pin shaft is provided at both ends with an elastic retaining washer. Said elastic retaining washer can prevent the movement of the pin shaft in the front and back direction during the use
2018233039 21 Sep 2018 of the flexibility ladder, so as to further ensure the reliability of the hinge connection of the paddle to the side plate.
[00100] As a preferable embodiment, the service ladder comprises an upper ladder, a lower ladder, a connecting member and a retaining member for enhancing effectively the safety, comfort and stability of the service ladder during the service procedure, so that a service man can climb to a higher frame by means of the service ladder for service works, when the components of the mining dump truck is under service. The connecting member connects the upper ladder with the lower ladder so as to enable the lower ladder to be retracted into overlap with the upper ladder. In this way, the mining dump truck can be allowed during operation to retract the lower ladder into the upper ladder to lift away from the ground, so that damage to the lower ladder due to impact by the obstacles on the ground can be avoided effectively, ensuring the lower ladder has a reliable operation life. The lower ladder is deployed with respect to the upper ladder under the action of the connecting member, when the mining dump truck is under service, so that the service man can climb, from the lower ladder to the upper ladder, up to the top for overhauling related components. Further, the connection of the connecting member with the upper ladder and lower ladder can be further configured for effecting the retracting movement of the lower ladder into the overlapping position with the upper ladder. The connecting member is fixed to a transverse steel tube at the lower end of the upper ladder and is hinged to the lower ladder, so that the lower ladder can be retracted by rotation with respect to the upper ladder. That is, when the mining dump truck is under service and the lower ladder is retracted, the lower ladder can be rotated about the link pair, and the lower end is lifted and rotated about to fold into a position parallel to the upper ladder, so as to bring the lower ladder into overlap with the upper ladder in a simple and convenient way. In order to retract the lower ladder in a simple and convenient way and make the retracted service ladder compact and occupy a small space, the lower ladder has a width dimension less than the width of the upper ladder between its two interior sides, so that the retracted lower ladder is overlapped within the central portion of the upper ladder. The connecting member comprises a base and two opposite lugs projected from the base. In this case, the base is provided with a fixation
2018233039 21 Sep 2018 hole for passing through and attachment of the steel tube of the upper ladder, while each lug is provided with a lug link hole and said two lug link holes are opposite to each other. In the meantime, the lower ladder is provided with a lower ladder link hole. When the lower ladder is connected with the connecting member, a rotation shaft is passed through two lug link holes and the lower ladder link hole, so that the lower ladder and the upper ladder are rotatable connected. Further, a distance of the center of the lug link hole to the base portion of the lug is larger than a distance of the lower ladder link hole to the connection end edge of the lower ladder. When the lower ladder is deployed to the position parallel to the upper ladder, the lower ladder abuts against the retaining member fixed to the connection between the upper ladder and the lower ladder, so as to avoid occurrence of a shaking and unstable lower ladder when it is affected by a force generated by climbing up of the service man. With such retaining member of this structure, a simple structure and simple and convenient manufacturing can be achieved and the deployed position of the lower ladder can be defined fully effectively. The retaining block is formed integrally with the connecting member. The surface of the retaining block comprises a section of inclined surface and a section of planar surface. When the retaining block is formed integrally with the connecting member, the retaining block is extended from the base of the connecting member along a deploying direction of the lower ladder, with a lower end edge of its inclined surface flush with the surface of the surface of the base that is in connection with the lug. That is, a lower end edge of the inclined surface is flush with the base portion of the lug, while its higher end edge is joined with the edge of the planar surface. As to the above-mentioned planar surface, the lower ladder abuts against it to effectively define its position in the deployed state of the lower ladder, whereas the above-mentioned inclined surface can provide the lower ladder with a rotation space, so as to avoid blockade to the connection end of the lower ladder during the retracting and deploying process of the lower ladder. The service ladder further comprises a hand rest, and the upper ladder, the lower ladder and the hand rest are all formed by welding steel tubes. Due to the larger stiffness of a steel tube, deformation resistance can be enhanced effectively so as to guarantee the safety during stepping on of the service man and prolong effectively the service life of the service
2018233039 21 Sep 2018 ladder. The upper ladder and the hand rest are welded integrally so as to define precisely the position of the hand rest and the upper ladder, reduce the mounting work load of the service ladder and enhance the mounting efficiency. In order to reliably fix the position of the lower ladder during retracting movement, the service ladder further comprises a clamp connection assembly. Preferably, the clamp connection assembly comprises two pairs of clamp connection holes and clamp pins inserted into each pair of clamp connection holes, wherein one clamp connection hole of each pair of clamp connection holes is provided on the upper ladder, the other is provided on the lower ladder. When the upper ladder is overlapped with the lower ladder, the openings of the clamp connection holes in each pair are opposite to each other. Then the clamp pin is inserted through two clamp connection holes to connect the lower ladder with the upper ladder, so that the retraction position of the lower ladder is defined effectively and stably.
[00101] Being different with the prior art, a high-voltage isolation switch is additionally arranged between the control cabinet and the motor, as a preferred embodiment. Preferably, the high-voltage isolation switch is connected with the control cabinet and the motor respectively, and is arranged within the control cabinet so that the e-circuit of the mining dump truck can be repaired by exchanging the said switch accordingly, no need to replace the cable.
[00102] Preferably, the high-voltage isolation switch is kV, more preferably, the Elec-connection between the control cabinet and the high-voltage isolation switch is AC inverter.
[00103] The compartment assembly comprises a truck hopper, a lifting mechanism and a weighting mechanism, wherein the lifting mechanism is located in front of the truck hopper and is configured to lift or lower the truck hopper, and the weighting mechanism is located at a bottom of the truck hopper and is configured to weight the truck hopper or a load of the dump truck.
[00104] The hopper comprises a bottom plate, a front plate and a first side plate located on the left side in a forward direction, and a second side plate on the right side which are welded in sequence. The horizontal end portions of the bottom plate are folded inwards from the hopper interior side by the roll bending process to form circular-arc shaped
2018233039 21 Sep 2018 connection portions S projecting outward. The first side plate and the second side plate are straight plates, and the first side plate and the second side plate are welded to the bottom plate by means of two circular-arc shaped connection portions S respectively. The circular-arc shaped connection portions S are formed by bending the bottom plate, and a lower edge of the front plate is bended towards the compartment interior inside to form circular-arc shaped connection portions S projecting outward from the compartment, and is welded to the bottom plate by means of the circular-arc shaped connection portions S. The bottom plate has a thickness greater than the thickness of the first side plate, the second side plate or the front plate.
[00105] As a preferable embodiment, in order to enhance the hardness and load capacity of the hopper and prevent dusts from being adhered to corners of the panel of the hopper, the hopper further comprises an enforcement plate, and the front plate is directly welded to the left and right side plates via its straight portion, i.e. a sharp corner structure is formed. In order to enhance the connection strength there between, an enforcement plate is provided at the connection of interior plates of the hopper, the enforcement plate is welded at its one end to the front plate and at the other end to the left and right side plates. The enforcement plate is a circular arc shaped enforcement plate projecting outward from the compartment. No air flowing occurs inside the closed environment after welding, so that the load capacity of the dump truck is increased, while it is possible to overcome the problem of reduction in load capacities of auxiliary components in prior art due to rust after long-term service.
[00106] As a preferable variation of this embodiment, the auxiliary enforcement components of the hopper comprises a near-ground enforcement beam, which includes a transverse beam and a longitudinal beam. The transverse beam and the longitudinal beam are provided on the near-ground surface of the hopper in a perpendicular crossing way. In order to increase the stiffness of the hopper, the longitudinal beam is preferably extended to the top of the front plate of the hopper. Vertical ribbed plates are welded onto the first side plate and the second side plate at their upper side walls respectively, wherein the vertical ribbed plate has the same length as that of the upper edge of the side wall. The compartment bottom plate is welded to other plates by circular-arc shaped
2018233039 21 Sep 2018 connection portion S, so that stress concentration areas for respective weld seam are avoided and it is possible to remove the problem of overlap of weld seams with stress concentration areas. In addition, less stress concentration occurs in the circular-arc shaped connection portions, so that the stiffness and impact resistance of the hopper are substantially enhanced. In addition, because the mining dump truck has a predetermined sum of the deadweight and carrying load, the weight of the hopper can be reduced and thus the load capacity of the whole vehicle can be enhanced, after a large amount of the vertical ribbed plate s at the weld seams are omitted in this solution.
[00107] The compartment side plate is provided with an auxiliary enforcement member, including a vertical ribbed plate and an anti-drop tube, wherein the vertical ribbed plate is located on the outer wall of the side plate in the vertical direction, and the anti-drop tube is located on the top of the side plate and is in a fixed connection between the vertical ribbed plate and the side plate.
[00108] The compartment side plate comprises a side plate body and a vertical ribbed plate provided outside the side plate body, wherein the vertical ribbed plate is of folded structure and fixed to the outside of the side plate body. The side plate further comprises an anti-drop tube which at its lower end is fixed to the vertical ribbed plate and at its interior is fixed to the side plate body. An enforcement component is further fixed between the lower outside of the anti-drop tube and the upper end of the vertical ribbed plate. The enforcement component is a horizontal support plate, and it is possible to provide a plurality of such support plates which are separated from each other vertically along the side plate body. Alternatively, the enforcement component can also be one mono block enforcement plate extending in the horizontal direction.
[00109] The side plate is further provided at its outside with a horizontal ribbed plate, and the vertical ribbed plate at its front end is embedded with a horizontal ribbed plate, wherein the front end of the anti-drop tube abuts against the horizontal ribbed plate. Such structure can reduce the occurrence of cracking or penetrating through when the side plate is hit, so as to enhance the operational stability of the side plate. In addition, the fixed connection of the vertical ribbed plate, the side plate body and the anti-drop tube enables the side plate to have a larger strength. When an object falls down to the
2018233039 21 Sep 2018 edge of the side plate, the curved profile of the anti-drop tube functions to guide and damp to some extent, so that the object can easily slide off to both sides of the anti-drop tube and impact to the top surface of the side plate is reduced and the fatigue performance of the top surface of the compartment side plate is enhanced. The front end of the vertical ribbed plate embedded with the horizontal ribbed plate can further enhance the hopper strength as whole. Even if the anti-drop tube is damaged by falling objects during long-term operation, due to that the anti-drop tube is not embedded at its front end into the horizontal ribbed plate, it is possible to remove easily the anti-drop tube, replace and mount a new anti-drop tube by simple operations, without any need for removing the vertical ribbed plate embedded in the horizontal ribbed plate during the whole replacement process.
[00110] The hopper further comprises a hopper shed which is located above the cab in the front of the truck body. A pantograph is provided on the upper surface of the hopper shed, and projections or grooves directly beneath the pantograph are located on the lower surface of the hopper shed for enhancing the mechanical strength of the shed, so that the hopper shed has a higher stiffness and impact resistance.
[00111] As a preferable variation of this embodiment, the shed’s near-ground surface of the hopper shed comprises a plurality of projections b and/or grooves s for enhancing the stiffness of the shed. The shed is made of high strength steel plates. Each of the projections b and/or grooves s has the same length as the shed in the vehicle traveling direction. Said plurality of projections b of the shed are separated into several groups of projections b, which groups are arranged at a distance from each other in sequence along a direction perpendicular to the vehicle traveling direction and each of which comprises only one or three projections b with a length extending in a direction parallel to the vehicle traveling direction. That is, it is extended from the front end of the shed to its rear end.
[00112] Four edges of the shed are welded with enforcement plates respectively, which enforcement plate has a plate surface perpendicular to the plate surface of the shed and is fixed to the projections b or/and grooves s. On the shed, several projections b and grooves s are formed by pressing or bending in a staggered arrangement. That is, one
2018233039 21 Sep 2018 groove s is located between two adjacent projections b. Since a lot of enforcement ribs which are welded to the base plate in prior art are omitted from this hopper shed, the welding process is omitted, manufacturing cost is reduced, and the problem of reduction in load capacity of the shed due to seam cracking under fatigue is ended. In the meantime, because the mining dump truck has a predetermined sum of the of the deadweight and carrying load, the weight of the hopper can be reduced and thus the load capacity of the whole vehicle can be enhanced, after a large amount of the enforcement ribs welded to the hopper are omitted.
[00113] The pantograph comprises cables and hydro pipes (hereunder collectively referred as pantograph lines), wherein the cables are provided for transferring the electric energy from the power net to the drive assembly of the vehicle, and the hydro pipes are provided for controlling the telescopic movement of the pantograph. When the mining dump truck is unloading, the hopper will be turned up about the swivel hinge point of the frame w respect to the frame, and the hopper falls down to its original position after unloading. The cables and hydro pipes are extended from the pantograph to the swivel hinge point between the hopper and the frame and further to the control cabinet of the dump truck’s drive assembly along the frame. The pantograph lines comprise following laying path: it is extended from the pantograph and then rearward from the bottom surface of the hopper shed and downward along the compartment front plate, rearward along the compartment bottom plate to the swivel hinge point, wherein the pantograph lines pass through the hopper shed to the bottom surface so as to reduce the laying path for the pantograph lines. The pantograph lines are extended again from the swivel hinge point along the top surface of the frame in a forward direction to the front portion of the vehicle in which the cab is located, i.e. the location in which the control cabinet is located, and is plugged into control cabinet from the platform in an ordinary way. In order to further reduce the laying path for the pantograph lines, the pantograph lines can be extended rearward from the bottom surface of the hopper shed and downward from the central line of the compartment front plate and then rearward along the central line of the compartment bottom plate to the swivel hinge point.
[00114] In this embodiment, a lifting bearing comprises a connection transverse beam
2018233039 21 Sep 2018 and two bearing head which are respectively welded to both ends of the connection transverse beam, wherein the connection transverse beam is a steel tube and is welded to the frame of the mining dump truck, and each of the bearing head is hinged to a corresponding lifting hydro-cylinder via joint bearing s. One axial end of the bearing head is in a press fit with a mounting opening in the inner ring of the joint bearing and fixed thereto. A piston rod of the lifting hydro-cylinder is in fixed connection with the outer ring of the joint bearing. Each bearing head and the connection transverse beam are prepositioned and connected via matching positioning hole and positioning shaft and then welded to each other.
[00115] The positioning hole in this embodiment is provided on the connection transverse beam, and the positioning shaft is formed in the bearing head accordingly. The bottom surface of the positioning hole in the connection transverse beam is abutted against the axial end face of the positioning shaft of the bearing head. The bearing head and connection transverse beam have welding surfaces as circular welding surface concentric to the positioning hole and positioning shaft which are welded in a circumferential direction after they have been positioned by such matching positioning hole and positioning shaft, so that the connection transverse beam and bearing head are connected by butt welding. The bearing head comprises weight reducing openings on its welding surface, and the bearing head has vents thereon which are in connection with the weight reducing openings.
[00116] In this embodiment, each bearing head is hinged to a lifting hydro-cylinder via joint bearing correspondingly. The bearing head is in press fit with the inner ring of the joint bearing and the lifting hydro-cylinder is in fixed connection with its outer ring. The bearing head comprises a fixing portion and a welding portion in the longitudinal direction of the transverse beam. The fixing portion is a cylindrical shaft that matches with the mounting opening of the joint bearing inner ring, which shaft has a transition portion to the welding surface in form of smooth curved surface. In this embodiment, it is possible to effect the butt welding of the welding surfaces in a rapid and precise way by means of clever improvement on the structures of the bearing head and connection transverse beam and also the assembling process with prepositioning and welding, so as
2018233039 21 Sep 2018 to reduce the welding period and enhance welding efficiency and assembly precision. The positioning shaft and positioning hole are in insertion fit, so that a restraining force can be applied to the bearing head and connection transverse beam in the radial direction of the positioning hole so as to enhance the reliability of the connection there between. The positioning hole, positioning shaft and welding surfaces are concentric, so that when the lifting hydro-cylinder drives in a telescopic way the hopper to turn relatively to the frame, the connection transverse beam and bearing head are loaded uniformly, so that the connection strength between the connection transverse beam and bearing head is increased and the service life of the lifting bearing is extended.
[00117] The lifting hydro-assembly comprises a lifting hydro-cylinder and a balance valve located between a cavity with rod and a cavity without rod of the lifting hydro-cylinder. The lifting hydro-cylinder is provided for lifting the hopper of the dump truck, and comprises a cavity with rod and a cavity without rod and functions to adjust the telescopic movement of the piton rod by means of alternatively feeding and discharging oils in cycle between said two cavities, so that the hopper hinged to the cylinder body is controlled to rise and fall. The balance valve is mounted on the lifting hydro-cylinder with a feeing port and a discharging port in butt connection with the oil port of the cavity with rod, whereas the control oil port of the balance valve is in butt connection with the oil port of the cavity without rod. The oil port of the cavity with rod and the oil port of the cavity without rod are located on a ring lug of the piston rod of the lifting hydro-cylinder, in which the balance valve is inserted, and the control oil port of the balance valve has a predetermined open/close pressure that is adjustable. When the hopper is subject to a reverse loading so as to cause the pressure in the cavity without rod to reduce suddenly, the balance valve functions to adjust the pressures in the cavity with rod and in the cavity without rod so as to avoid abnormal movement due to the reverse loading on the cylinder body. The balance valve is directly mounted on the lifting hydro-cylinder and is in rigid connection with the lifting hydro-cylinder, wherein the feeding port and discharging port of the balance valve are associated with the oil port of the cavity with rod and the control port of the balance valve is associated with the oil port of the cavity without rod.
2018233039 21 Sep 2018 [00118] As a preferable variation of this embodiment, the lifting hydro-assembly comprises two lifting hydro-cylinders, wherein the first lifting hydro-cylinder and the second lifting hydro-cylinder are inserted with a balance valve. When the first lifting hydro-cylinder and the second lifting hydro-cylinder are loaded differently, both cylinders move asynchronously, resulting in asynchronous movement of the connection portion between the first lifting hydro-cylinder and the second lifting hydro-cylinder of the hopper. In this case, the inductive load for the different open/close pressure can be adapted by adjusting two balance valves, so that the output power of said two lifting hydro-cylinders can be adjusted and thus the movement of said two lifting hydro-cylinders can be synchronized to keep the hopper in load balance. In the present lifting hydro-assembly, the balance valve is directly mounted on the lifting hydro-cylinder and no oil pipe is connected between the balance valve and the cavity with rod. While a high pressure is established in the cavity with rod, said high pressure cannot be transferred to any oil pipe because oil pipes are not involved in the whole operation procedure of the balance valve, so that the operational reliability of the balance valve is ensured, with the balance valve remaining in an effective working condition.
[00119] In addition, a liquid and gas control assembly comprises a motor gas exhaust component, a dry oil lubrication station control component, a ground control electrical component operated by a ground operator outside a truck, and an electrical central diagnosis box.
[00120] Preferably, the hydro-pneumatic control assembly comprises an engine exhaust mechanism, a dry-oil lubrication station control assembly, electrical elements which can be operated by ground operators outside the vehicle and a driver-operated and electric integrated diagnose box. Particularly, the engine exhaust mechanism comprises a plurality of exhaust pipes and many mufflers connected respectively to outlet ends of said plurality of exhaust pipes, wherein at least one of the mufflers is located at one side of an upper ring beam of the vehicle adjacent to the headstock and others are located another side of the upper ring beam of the vehicle adjacent to the tailstock. The exhaust pipes are arranged parallel to the upper ring beam, the outlet ends of the exhaust pipes
2018233039 21 Sep 2018 are connected to the mufflers by means of bellows, and the exhaust pipes and mufflers are fixed beneath the platform of the vehicle by connection mechanism. The dry-oil lubrication station control assembly is provided for checking the working state of the dry-oil lubrication station of the mining dump truck and is mounted on a cylinder body of the dry-oil lubrication station, comprising a monitoring part, a conducting part and a fixing part. The monitoring part comprises a lubrication control component for switching on/ofT a lubrication pump in the dry-oil lubrication station, the conducting part is provided for putting the monitoring part and the dry-oil lubrication station into connection, and the fixing part can mount the dry-oil lubrication station control assembly on the dry-oil lubrication station. The dry-oil lubrication station control assembly comprises a box and a mounting support for connecting the box and the dry-oil lubrication station, wherein the monitoring part is located on the top of the box and the conducting part is located on the side wall of the box. The monitoring part further comprises an oil level monitoring component for detecting the lubrication oil volume in the dry-oil lubrication station, which comprises a low level indication lamp and a high level indication lamp both of which are connected to oil level sensors in the dry-oil lubrication station to receive a low level signal and a high level signal respectively. The ground control electric elements are integrated in the control box which is fixed to the bumper in the front of the headstock, wherein the control box has a lid that can opened laterally for operation. The control elements in the control box include a battery main break switch, a stair lamp switch and/or a service lamp switch and/or an engine emergency stop button. The diagnose box on the dump truck is located on a cab instrument console with communication ports for many electrical control devices of the mining dump truck integrated therein, which electrical control devices can transmit signals with an exterior processor via said communication ports integrated in the same collection diagnose box so as to monitor or detect the working conditions of the electrical control devices, wherein the electrical control devices can be vehicle control unit and/or engine ECU and/or drive unity and/or display. The collection diagnose box comprises a box lid, a box body and a box lock, wherein the box body is formed with opening. The electrical control devices comprise data communication lines leading to
2018233039 21 Sep 2018 the cab instrument console, one end of which lines includes a communication port and which is introduced to the cab instrument console from its backside.
[00121] As shown, the exhaust assembly in this embodiment comprises two exhaust pipes, i.e. the first exhaust pipe and the second exhaust pipe, and also two corresponding mufflers, i.e. the first muffler and the second muffler. The first muffler is connected to the outlet end of the first exhaust pipe and both are located on the rear side of the upper ring beam of the vehicle, whereas the second muffler is connected to the outlet end of the second exhaust pipe and both are located on the front side of the upper ring beam of the vehicle. An embracing hoop is fixed on the exhaust pipe and a ferrule is fixed on the muffler, wherein the embracing hoop and ferrule are hanged on the lower side of the vehicle platform via hangers.
[00122] As a preferable variation of this embodiment, two exhaust pipes and two mufflers are provided respectively. However, the number of the exhaust assembly in this application is not limited thereto.
[00123] In the engine exhaust assembly of this embodiment, at least one muffler is located on one side of the upper ring beam of the vehicle adjacent to the headstock, and other mufflers are located on another side of the upper ring beam of the vehicle adjacent to the tailstock. Because the engine is located in front of the upper ring beam of the vehicle, the exhaust pipe which is connected to the muffler in the front of the upper ring beam does not have to pass by under the upper ring beam, rather can be directly connected to the muffler in the front of the upper ring beam, so that the lay-out of the engine exhaust pipes are simplified accordingly and it facilitates the mounting and arrangement of the exhaust pipes with less time and effort. In addition, many mufflers are distributed at the front and rear sides of the upper ring beams, so as to avoid congested space at the rear side of the upper ring beam and to simplify the spatial arrangement at the rear side of the upper ring beam.
[00124] As a preferable variation of this embodiment, the dry-oil lubrication station control assembly is provided with a monitoring part, a conducting part and a fixing part, wherein the monitoring part comprises a lubrication control component for switching on/off a lubrication pump in the dry-oil lubrication station, and the conducting part is
2018233039 21 Sep 2018 provided for putting the monitoring part and the dry-oil lubrication station into connection so as to monitor related actuators in the dry-oil lubrication station. The dry-oil lubrication station control assembly further comprises a box and a mounting supper as the fixing part fixed to the bottom of the box and the cylinder of the dry-oil lubrication station, which mounting support is provided with a mounting groove and legs, by mean of which mounting groove the box of the dry-oil lubrication station control assembly can be mounted and fixed to the bottom surface thereof. In the meantime, the dry-oil lubrication station control assembly is supported by the legs and fixed to the cylinder surface of the dry-oil lubrication station. The monitoring part is provided on the top of the box and the conducting part is located on the side wall of the box, wherein the monitoring part and conducting part are integrated with the box, and conductors and relays and terminal blocks which are connected to related monitoring part and conducting part via conductors can be located within the box. The top of the box is formed as a removable cover plate for facilitating wire connection and investigation within the box. The cover plate is fixed to the body of the box by screws. The oil level monitoring component comprises a low level indication lamp and a high level indication lamp both of which are connected to oil level sensors in the dry-oil lubrication station for receiving a low level signal and a high level signal. As shown, the conducting part is provided with five ports, each of which is connected to the corresponding monitoring part and actuators in the dry-oil lubrication station via conductors, wherein a first exterior interface is connected to the oil level sensor via external conductors and to the low level indication lamp and high level indication lamp via internal conductors, a second interface is connected to the lubrication pump via external conductors and to the relay located in the dry-oil lubrication station control assembly via internal conductors, which relay is connected outwardly to the cab controller via a third interface and the controller is further connected to a fourth interface via conductors so as to be connected with the lubrication control member, and a fifth interface is connected to a solenoid valve which controls the feed and discharge of the lubrication oil of the lubrication pump via external conductors so as to be connected to the relay and thus to the cab controller via the third interface for outputting control
2018233039 21 Sep 2018 signals. The controller is also connected to the fourth interface via conductors so as to be connected to the lubrication control member. The dry-oil lubrication station control assembly is provided for checking the working condition of the dry-oil lubrication station in the mining dump truck. With the above-mentioned design, the lubrication control member and conductors can be integrated into the cylinder of the dry-oil lubrication station to facilitate intuitive watching of the working condition of the lubrication pump during service operation, enhance service efficiency effectively and ensure reliable and stable operation performance of the dry-oil lubrication station.
[00125] In this embodiment, the control box can be mounted on a battery casing adjacent to the battery main break switch at a left position in the traveling direction, and the control box as well as the power box are mounted on the bumper. In order to facilitate taking power from the battery casing by the battery main break switch and reduce the wire length between the battery casing and the battery main break switch, the battery main break switch may comprise a primary main break switch and a secondary main break switch, wherein the primary main break switch is a power main switch and the secondary main break switch is only used for feeding power to the engine. The control box further comprises a stair lamp switch and/or a service lamp switch and/or an engine emergency stop button therein. A threading hole is provided on the box between the operation panel and the mounting panel for connecting wires to targeted elements like stair lamp, service lamp, engine ECU, etc... Seal strips can be provided on the butted edges of the box lid and body of the control box; which seal strips shall achieve Ingress Protection IP. With such electric elements integrated with the control box, on one hand, the box can protect the operation panel from each side thereof so as to prevent mud from splashing onto the operation panel, and on the other hand, the lid can protect the operation panel from its front side so as to prevent mud from splashing onto the operation panel from this front side. Therefore, the ground control electric elements on the operation panel can be protected from being splashed by mud so as to reduce the failure rate and prolong the service life of the ground control electric elements.
[00126] As a preferable variation of this embodiment, the collection diagnose box of the dump truck is located on the cab instrument console for facilitating driver’s operations,
2018233039 21 Sep 2018 wherein the instrument console is provided for mounting display, various instruments and fan opening, etc., and the collection diagnose boxes embedded within the cab instrument console. That is, the collection diagnose box has a body recessed with respect to the surface of the cab instrument console, whereas the collection diagnose box also has an opening lying in the same plane as the surface of the cab instrument console. The electrical control device is further connected to a data communication line, one end of which data communication line is connected to the electrical control device and the other end of which comprises a communication port. The data communication line is extended from the electrical control device to the cab instrument console and the communication port is fixed in the collection diagnose box, for enabling the electrical control device to transfer signals to external processors like lap-top via the communication port.
[00127] The collection diagnose box has a plurality of communication ports of the above-mentioned electrical control device mounted therein, which communication ports function to realize data transmission between the electrical control device and the external processors such as lap-top, so that the working condition of the electrical control device can be controlled and detected. The collection diagnose box further can comprise a box body, a box lid and a box lock, wherein the box body is formed with an open opening. Particularly, the electrical control device can be vehicle control unit and/or engine ECU and/or drive assembly and/or display, so that it is possible to control the power component, electric devices, displays and engine selectively or in a uniform synchronous way. Correspondingly, communication ports can be vehicle control unit communication portend/or display communication portend/or drive assembly communication portend/or engine ECU communication port. The collection diagnose box is provided with a plurality of communication ports for electrical control devices of the mining dump truck, wherein the electrical control devices can transfer signals to an external processor via the communication ports mounted in the same collection diagnose box so as to monitor or detect working conditions of the electrical control devices. A plurality of communication ports for various electrical control devices are fixed in the collection diagnose box as mounting structure, instead of being distributed at different
2018233039 21 Sep 2018 locations on the dump truck, so that it is possible on one hand to facilitate collective management and adaption of respective communication port and on the other hand to optimize the overall layout of the data communication lines within the dump truck so as to avoid complicated wiring and tangle of multiple wires.
[00128] In addition, improvements are made to the parts of the whole mining dump truck provided in this invention. The details are given below:
[00129] The dump truck auxiliary component comprises a hydro cooling assembly, a hydro-pump drive assembly, a hydro oil tank, a lamp assembly, an exhaust assembly, a flat cable management assembly and a fire extinguishing assembly.
[00130] The lamp assembly comprises a taillight box, the exhaust assembly comprises a cooling air channel and an intake manifold, and the flat cable management assembly comprises a wiring harness fixing assembly, a power cable fixing assembly and a fixing arrangement for generator's damping strips and ring. The hydro-pump drive assembly comprises a working hydro-pump and a transmission shaft for connecting to the engine shaft of the dump truck and transferring the power from the engine shaft to the working hydro-pump. It further comprises a transfer box, the input port of which transfer box is connected to the transmission shaft and output port of which is connected to an input shaft of the working hydro-pump. The transfer box is a horizontal gear box with four output ports. The working hydro-pump comprises a lifting pump, a steering pump and a circulation pump, wherein the circulation pump and the steering pump are connected in series with the same output port to form a steering circulation duplex pump. The lifting pump is a duplex gear pump. The hydro-oil tank comprises a tank body, a cover plate, a separator and an extension plate, wherein the tank body is in form of box with a length and width larger than its height, and a removable cover plate is provided on the top of the box-shaped structure. The separator is located in the box-shaped structure, and the lifting assembly oil tank is located in front of the box-shaped structure with its both ends extending to the rear side of the box-shaped structure. The steering assembly is located at the rear side of the box-shaped structure with its central portion extending to the front side of the box-shaped structure. The extension plate is also provided in the tank body at a distance from the front wall of the box-shaped structure. An oil suction hole is
2018233039 21 Sep 2018 provided on the bottom plate of the tank body, and the oil suction hole of the lifting assembly is provided on one side of the extension plate. The lifting assembly oil tanks provided with an oil returning pipe of the lifting assembly, an oil returning opening of which is provided on the other side of the extension plate. The taillight box of the mining dump truck comprises a chamber receiving a reversing indication lamp and a viewing window, on which is provided a wiper and a nozzle, and a working break lamp, two reverse lamps, two steering break lamps and two IR lamps are included in the taillight box. The cooling air channel of the mining dump truck at both ends has an intake end and blowing end. The cooling air channel is a cooling air channel of glass fiber reinforced plastics and is in fixed connection with a blowing opening of the fan of the mining dump truck via a square mounting frame. The cooling air channel further comprises a circular connection tube connected to its blowing end, which circular connection tube at one end is in sealing connection with the blowing end. The flowing-through area of the cooling air channel is decreased gradually from its intake end to its blowing end. This engine intake manifold is an intake manifold of glass fiber reinforced plastics. The automatic fire extinguishing assembly comprises a medium storage assembly and an ejection device, wherein the medium storage assembly comprises a group of dry powder tanks, nitrogen bottles and starters. The ejection device comprises a main pipe and branch pipes, each of the branch pipes is in connection with the main pipe and is provided with a nozzle at its end and located at respective protection location of the dump truck. The outlets of the dry powder tanks are in connection with the main pipe, and the starter can introduce nitrogen gas from the nitrogen gas bottles into the dry powder tanks when being started. The dry powder tanks and nitrogen gas bottles are arranged on a mounting support, and a five port joint is provided at the outlet of the dry powder tank for connecting with four main pipes. The electrical starter is provided on the nitrogen gas bottle for controlling an alarm device and medium storage assembly.
[00131] The hydro cooling assembly comprises an oil tank, into which the hydro oil of the dump truck control assembly is returned. That is, hydro oil from oil return paths of respective actuator of the dump truck is returned to the oil tank, and stored in the oil tank
2018233039 21 Sep 2018 and fed in circulation to respective actuator. The hydro cooling assembly further comprises a cooling device and an oil pump, wherein a feeding path and a discharging path is connected between the cooling device and oil tank. As used herein, the feeding path is meant to indicate an oil path feeding oil from the oil tank to the cooling device, and the discharging path is meant to indicate an oil path returning oil from the cooling device to the oil tank. Correspondingly, the gear oil pump is provided in the feeding path for pumping the hydro oil in the oil tank to the cooling device. The oil tank of the hydro cooling assembly comprises a steering oil tank and a lifting oil tank, and the feeding path of the cooling device comprises a first oil path and a second oil path. The oil pump comprises a first oil pump and a second oil pump, wherein the first oil pump and the second oil pump, are provided in the first and second oil paths, respectively. The first oil path is located between the steering oil tank and the cooling device, while the second oil path is located between the lifting oil tank and the cooling device. Further, the cooling device comprises a second oil pump and a second cooling device, wherein the second oil pump is connected to the first oil path and the second cooling device is connected to the second oil path, both of which cooling devices are connected to respective discharging path. The hydro cooling assembly further comprises a filter provided in the first oil path. The hydro cooling assembly in this embodiment is an external circulation assembly. In this case, when the specific hydro cooling assembly is provided as external cooling device independently from the control assembly, the contact area of the hydro oil with external environment is increased so as to obtain better cooling effect to overcome the problem of cooling inefficiency in the prior dump truck and high oil temperature. The hydro cooling assembly takes oil directly from the oil tank independently from the control assembly, variation in oil volume of the discharging path of which does not affect the hydro cooling assembly, so that the cooling assembly possess stable and reliable cooling performance.
[00132] The hydro-pump drive assembly in this embodiment comprises a working hydro-pump and a transmission shaft for connecting with an engine shaft of the dump truck and transferring the power of the engine shaft to the working hydro-pump to provide power for increasing the hydro oil pressure. It further comprises a transfer box
2018233039 21 Sep 2018 in form of horizontal gear box for distributing the engine power, wherein the transfer box has an input port connected with the transmission shaft, and an output port connected with an input shaft of the working hydro-pump. The working hydro-pump comprises a lifting pump, a steering pump and a circulation pump, wherein the circulation pump and the steering pump are connected in series with the same output port of the transfer box. The circulation pump is provided for feeing oil to an oil cooling circulation assembly, and the steering pump is provided for feeing oil to steering assembly of the dump truck, both pumps being connected in series with the same output port and forming in combination a steering circulation duplex pump. The lifting pump is a duplex gear pump. The transfer box has four output ports, and two lifting pumps and two steering circulation duplex pumps are provided. Two output ports of the transfer box is in connection with two lifting pump, and other two output ports of the transfer box are in connection with two steering circulation duplex pumps. Serial connection of the transfer box and the transmission shaft enables respective working hydro-pump to distribute around the transfer box collectively, and the hydro-pump drive assembly has a compact overall structure. Respective working hydro-pumps are driven by different output ports of the transfer box, each of which can have a different speed ratio and at which power is obtained independently from the transmission shaft, so that a wider selection range of transmission capacity can be obtained by adjusting speed ratios. All the working hydro-pumps are not connected in series any more, and the number of the working hydro-pumps will not be limited by the stiffness of the through shaft and overall axial size any more, and therefore a larger number of working hydro-pumps can be provided to achieve the required flow, so that the contour size and output of one single hydro-pump is reduced, the service life of the hydro-pump is extended and the matching difficulty is reduced.
[00133] As a preferable embodiment, the hydro oil tank comprises a tank body, a cover plate, a separator and extension plates, wherein the tank body is in form of box with a length and a width equal to or larger than four times of its height. A removable cover plate is located on the top end of the box-shaped structure, which cover plate comprises at least two partial cover plates, each of which is removable connected to the box-shaped
2018233039 21 Sep 2018 structure independently. The hydro oil tank further comprises an oil suction hole, a plurality of oil suction holes for a lifting assembly and a plurality of oil suction holes for a steering assembly, wherein the oil suction holes, are distributed symmetrically. A vertical separator is provided in the box-shaped structure for separating the interior of the box-shaped structure into a lifting assembly oil tank and a steering assembly oil tank which are not in communication, so as to ensure said two oil tanks would not interfere with each other during operation. Further, the oil suction holes for the steering assembly oil tank are provided at the rear side of the box-shaped structure, wherein the steering assembly oil tank is further provided with a steering assembly oil return pipe, an oil output of which is provided in the front side of the box-shaped structure. Extension plates extending in the front to rear direction are provided on both ends within the lifting assembly oil tank, at a distance from the front wall of the box-shaped structure. The oil suction holes for the lifting assembly oil tank are provided on one side of the extension plates, and the lifting assembly oil tank is further provided with a lifting assembly oil return pipe, an oil output of which is located on the other side of the extension plates. With such structure, the oil level during the lifting procedure of engineering machinery is varied less over the prior art due to the larger cross section of the oil tank than its height, so that in the same situation, it is possible to prevent the oil level from being dropped below the suction oil filter in the oil tank to avoid empty suction of the oil pump. Such flat box-shaped structure has a smaller height, i.e. a relatively small depth of received hydro oil. Because the pressure is in direct proportion to the hydro oil depth, the hydro oil applies a less pressure to the internal wall of the oil tank at the lower end, so as to reduce the required strength for the hydro oil tank accordingly, and to reduce the manufacturing cost of the hydro oil tank. Because the cover plate is removable mounted on the top end of the box-shaped structure, an operator can conduct operation like maintenance after removal of the cover plate, so that the cover plate has a larger area and reasonable location in comparison with the prior art structure with small flanges mounted on the bottom side edge so as to enable the operator to have a larger operational space and for facilitating the service work.
[00134] The taillight box in this embodiment form a sealed chamber, together with the
2018233039 21 Sep 2018 rear vehicle body of the dump truck, for receiving the reverse indication lamp of the dump truck, comprising a work break lamp, two reverse lamps, two direction indication lamps and two IR lamps, wherein the reverse lamps, direction indication lamps and IR lamps are arranged symmetrically with respect to the travelling direction of the dump truck, while the work break lamp is elongate and provided in the horizontal direction within the taillight box. The taillight box further comprises a viewing window which is made of transparent materials for enable the reverse indication lamp to be watched properly through the viewing window. For facilitating the watching, the viewing window typically faces to the rear side in the travelling direction of the dump truck. On an outer surface of the viewing window of the taillight box is provided a wiper, and a wiper motor and a nozzle are provided within the taillight box, with a corresponding water tank and spraying motor therein. The viewing window forms a chamber of the taillight box, together with a first lateral shell and a second lateral shell, wherein an operation port is removable provided on the first lateral shell and is covered by a service cover, and a loudspeaker mounting opening and a wiring opening for guiding the wires off the taillight box are provided on the second lateral shell. A rear view camera is provided in the chamber formed between the taillight box and the rear vehicle body of the dump truck, so that it is protected within the taillight box. In this embodiment, the reverse indication lamp is housed in the taillight box, so that the reverse indication lamp is isolated by the taillight box from the outside on one hand so as to avoid being splashed with mud from the rear wheels and being covered or blurred for enhancing operational safety during reversing operation, and on the other hand, the viewing window is provided to ensure that the reverse indication lamp can be properly watched so as to precisely indicate reversing, direction changing and breaking states. In addition, the lateral plates are provided with operational openings for facilitating service work and manipulation of internal devices.
[00135] The cooling air channel of the mining dump truck in this embodiment at both end has an intake end and a blowing end, wherein the is in connection with the blowing opening of the fan of the mining dump truck, and the blowing end is adjacent to the electrical control assembly for guiding the cooling air from the fan to the electrical
2018233039 21 Sep 2018 control assembly to cool it down. The cooling air channel is a cooling air channel of glass fiber reinforced plastics with a rectangular channel cross section. A square mounting frame is located on the outer wall at the intake end of the cooling air channel, both ends of which frame are in fixed sealing connection with the air channel intake end and the fan blowing end. The cooling air channel further comprises a circular connection pipe connected to its blowing end, one end of which pipes in sealing connection with the blowing end and the other end is in connection with the electrical control assembly. The cooling air channel has a cross section sectioned along a plane perpendicular to its axis or air flowing direction and reduced gradually from its intake end to the blowing end, so that the blowing speed at the blowing end is substantially increased to accelerate the heat exchange and cooling process. Because the glass fiber reinforced plastics have a density equal to one fourth to one fifth of the density of steel, the glass fiber reinforced plastic cooling air channel has a mass substantially less than the prior art steel cooling air channel, so that the truck weight is reduced. In addition, the glass fiber reinforced plastic cooling air channel is impacted less when the mining dump truck bumps in a bad road condition, and the cracking of the weld seams can be avoided by omitting the welding of the glass fiber reinforced plastic cooling air channel. The glass fiber reinforced plastic cooling air channel has a higher corrosion resistance so as to prevent rust failure during long term operation.
[00136] The dump truck engine intake pipe in this embodiment is formed by integral injection molding from glass fiber reinforced plastics, comprising a pipe body and a curved pipe, wherein the pipe body has two ends, i.e. the first end and the second end, to the first end of which one end of the curved pipe is connected. The pipe body is straight,
i.e. it has a straight axis, and the curved pipe is an elbow, i.e. it has an arc-shaped, preferably minor arc shaped, axis. The curved pipe is butt joined to the first end of the pipe body at its one end that is the curved pipe has the same inner diameter as the pipe body, and the axis of the curved pipe is located in the same plane as the axis of the pipe body. A conical pipe at its one end with a smaller diameter is connected to a first air duct, and a second air duct is connected to the other end of the curved pipe, wherein the first and second air ducts, are straight tubes. The first air duct has one end as blowing
2018233039 21 Sep 2018 end which is not in connection with the conical pipe, and the second air duct has one end as intake end which is not in connection with the curved pipe. With such intake pipe of above-mentioned structure, gas must be turned when passing through the curved pipe so as to prevent effectively dust from being entered in the intake pipe and to avoid abrasive damage to engine cylinders. The intake pipe of glass fiber reinforced plastics has a higher corrosion resistance to prevent rust failure during long term operation and thus to prevent rust crumbs from entering in the engine valve train via the intake pipe to cause server abrasion to the cylinders. The glass fiber reinforced plastics has smaller density and mass than steel, so that the intake pipe of glass fiber reinforced plastics has a smaller mass than the prior art steel intake pipe, resulting in corresponding weight reduction of the vehicle.
[00137] The wiring harness fixing assembly is provided for confining relative movement between the end portions of the wiring harness and the joint so as to protect the wiring harness from breaking wire cores at the wire abutment position in the joint, and comprises a clamping portion and a fixing portion fixed to each other. The clamping portion can clamp the harness so as to fix one side of harness adjacent to the joint to the wiring harness fixing assembly. The fixing portion can fix to a rear axle box that is attached to the joint. The clamping portion is provided with many fixing holes for threading and fixing the harness, which fixing holes are arranged in sequence in the arranging direction of the harness. The clamping portion comprises an upper fixing element and a lower fixing element fixed to each other, wherein the upper fixing element and lower fixing element divide equally the fixing hole along the axis thereof. That is, the fixing hole is formed by joining one half of fixing hole in the upper fixing element and another half of fixing hole in the lower fixing element. The fixing portion is a support fixed to the clamping portion, which has an end portion attached to the surface of the rear axle box. The support is a U-shaped support with a bottom end welded to the surface of the rectangular clamping portion, so as to prevent effectively the interference of the U-shaped support to the harness. Two lateral supports are welded to the rear axle box at their ends, which lateral supports are fixed to a right-angled triangular support frame, one leg of which support frame is fixed to a corresponding lateral support, and
2018233039 21 Sep 2018 the other leg of which is welded to the rear axle box. The wiring harness fixing assembly is provided for confining the relative movement between the end portion of the wiring harness and the joint and comprises a clamping portion and a fixing portion fixed to each other, wherein the clamping portion clamps one side of the harness adjacent to the joint, and the fixing portion is fixed to the rear axle box that fixes the joint. With such configuration, the relative movement between the end portion of the wiring harness and the joint caused by vibration can be eliminated, so that wire cores at wire abutment portion in the joint are effectively protected so as to extend the service life of the wiring harness.
[00138] As a preferable variation of this embodiment, the power cable fixing assembly is provided for fixing power cables of the electrical mining dump truck, comprising a fixing body which is provided with a plurality of retaining holes, in this case retaining holes located in sequence along the longitudinal direction of the fixing body, so that the power cable fixing assembly is formed with a structure of single layer of retaining holes. The power cable fixing assembly comprises a upper fixing portion and a lower fixing portion which separate respective retaining hole in a direction parallel to the axis of the retaining hole, wherein the upper and lower fixing portions, are butt joined to form the fixing body, with the retaining holes provided separately on the upper and lower fixing portions, simultaneously, so that the power cable is clamped in the retaining holes when the upper and lower fixing portions, are butt joined, which upper and lower fixing portions divide equally respective retaining hole. The upper and lower fixing portions, are provided with connection holes which are joined and communicated, so that a fastener can be inserted through the upper and lower fixing portions, to connect the upper and lower fixing portions, reliably and stably. The upper and lower fixing portions, can be connected by means of retaining groove and pin, wherein the retaining groove is provided on the end face of the lower fixing portion that is joined with the upper fixing portion, while the retaining pin is protruded from the mating end surface of the upper fixing portion. Each retaining hole has an opening expanded outward in form of trumpet, and a rubber washer is mounted at the edge of the opening of the retaining hole for reducing abrasion. The power cable fixing assembly is snap connected on guide
2018233039 21 Sep 2018 rails by C-shaped rail nut, which guide rails are welded to the vehicle frame to ensure firm connection. With the above-mentioned structure, power cables can be threaded through the retaining holes and fixed into the retaining holes of the power cable fixing assembly, so that each power cable can be attached to the power cable fixing assembly in a simple, convenient and well defined way to improve the distribution state of the power cables on the vehicle frame, allowing service work on each power cable. In the meantime, each retaining hole is located in sequence along the longitudinal direction of the fixing body. That is, the power cable fixing assembly is only provided with a single layer of retaining holes so as to reduce the size of the power cable fixing assembly to allow it to be mounted in a narrow space and enhance effectively the applicability of the power cable fixing assembly by making full use of a larger longitudinal size and also solve the problem of mounting power cables within a lower space with difficulty.
[00139] The electrical generator in this embodiment comprises a fixing structure for damping strips and a damping ring, comprising an end plate, damping strips and a damping ring, wherein many damping strips are mounted on the end plate in parallel. It further comprises a support block which at its one end is fixed to the end plate and at the other end support the damping rings as to weld the damping ring to an end of respective damping strip. Many damping strips are mounted in parallel on the end plate, with one end of each damping strip connected to the damping ring, wherein the damping ring is conducted with the damping strips respectively and is firstly supported by the support block and then welded to the damping strips. The damping ring comprises a mounting opening, with which the other end of the support block as mounting end is engaged, e.g. by means of interference fit or transition fit. When the mounting hole is engaged in transition fit with the mounting end, the damping ring and the support block can be tied by binding band to ensure that the damping ring is supported reliably by the support block. At least two support blocks can be provided, each of which is mounted in parallel on the end plate and below the damping strips to support jointly the damping ring. With such fixing structure, the damping ring is supported by the support block and then be welded to the damping strips. In case of rotation of the damping ring and strips, the support block functions to support the damping ring and strips when the load outside the
2018233039 21 Sep 2018 generator is vibrated, so as to prevent weld seams of the damping ring and strips from being broken and ensure the welding reliability and conduction of currents produced in respective damping strip with the damping ring, so that damping action is applied to the vibration to relief the impact on the generator’s windings and to enhance the generator operation reliability.
[00140] As a specific embodiment, the dump truck comprises an automatic fire extinguishing assembly, comprising a medium storage assembly and an ejection device, wherein the medium storage assembly includes a group of dry powder tank, nitrogen gas bottle and starter. The ejection device comprises a main pipe and branch pipes, each of which branch pipes is in connection with the main pipe and is provided at its end with a nozzle and located at respective protection location of the dump truck respectively. The outlet of the dry powder tank is in connection with the main pipe, and nitrogen gas can be entered from the nitrogen gas bottle into the dry powder tank when the nitrogen gas bottle is actuated by the starter. The dry powder tank and nitrogen gas bottle are mounted on a mounting support which has respective adjacent base s for matching with the dry powder tank or nitrogen gas bottle. After mounting, the dry powder tank and nitrogen gas bottle are provided on a platform via said mounting support, resulting in space saving on the platform. The starter is provided on the nitrogen gas bottle for actuating the nitrogen gas bottle at any time in a convenient way. The nitrogen gas bottle is further nested with a fixing frame, a mounting end of which is connected with the dry powder tank.
[00141] In case of fire on the dump truck, the starter of the automatic fire extinguishing assembly can be actuated manually or automatically, which starter in turn can actuate the nitrogen gas bottles as to introduce the high pressure nitrogen gas in the nitrogen gas bottle into the dry powder tank, wherein the outlet of the dry powder tank is in communication with the main pipe, and in this case, the dry powder in the dry powder tank is entered in the main pipe under the action of the nitrogen gas and reached in respective protection location in the dump truck via respective branch pipes, so that the dry powder is ejected via nozzles to the protection location to extinguish the fire in the dump truck. The outlet of the dry powder tank is provided with a five pass joint, by
2018233039 21 Sep 2018 means of which the outlet is in communication with four main pipes and which includes five connection ports. The outlet of the dry powder tank is in communication with one of the connection ports of the five pass joint, the other four of which are in connection with four main pipes respectively. Each main pipe controls a plurality of protection locations via branch pipes. The automatic fire extinguishing assembly adopts a collection storage method with a group of larger dry powder tank and nitrogen gas bottle, so that the dry powder is fed to respective protection location from one dry powder tank, and therefore it is possible to occupy less space and save cost over the prior art. When the fire extinguishing assembly is actuated, the starter actuates the nitrogen gas bottle to introduce the high pressure nitrogen into the dry powder tank, so that the dry powder in the dry powder tank can be delivered to respective protection locations via the ejection device and ejected towards such protection location via nozzles simultaneously, with a better fire extinguishing effect.
[00142] The objective of this invention is to provide a mining dump truck with improvements on various aspects, such as driving comfort, vehicle security, stability and rigidity, production process simplification and the like. In particular, major improvements are made to address the problem that the parts of the dump truck can be easily damaged or dropped due to high loads during the working process. In conclusion, the mining dump truck provided in this invention is obviously superior to the prior art.
BRIEF DESCRIPTION OF THE DRAWING [00143] In order to clearly illustrate the technical solutions of embodiments in this invention or the prior art, the drawings used in description on the embodiments and prior art are briefly introduced. Obviously, the drawings described below are only some of the embodiments of this invention. For those skilled in the art, other drawings may also be obtained there from without offering creative labor.
[00144] Figure 1 is a schematic diagram for a structure of the mining dump truck; [00145] Figure 2 is a back view of the mining dump truck;
[00146] Figure 3 is a schematic diagram for a main-frame of the mining dump truck; [00147] Figure 4 is a schematic diagram for a bumper of the mining dump truck;
2018233039 21 Sep 2018 [00148] Figure 5 is a schematic diagram for another bumper of the mining dump truck;
[00149] Figure 6 is a schematic diagram for a front suspension cylinder connecting block of the mining dump truck;
[00150] Figure 7 is a schematic diagram for a rear axle housing of the mining dump truck;
[00151] Figure 8 is a schematic diagram for a steel cylinder of a rear axle housing of the mining dump truck;
[00152] Figure 9 is a schematic diagram for another steel cylinder of a rear axle housing of the mining dump truck;
[00153] Figure 10 is a schematic diagram for a upper pull rod supporters of a rear axle housing of the mining dump truck;
[00154] Figure 11 is a schematic diagram for another upper pull rod supporters of a rear axle housing of the mining dump truck;
[00155] Figure 12 is a schematic diagram for a rear axle housing body of the mining dump truck;
[00156] Figure 13 is a schematic diagram for another rear axle housing of the mining dump truck;
[00157] Figure 14 is a schematic diagram for a bumper bottom plate of a rear axle housing of the mining dump truck;
[00158] Figure 15 is a schematic diagram for a lock catch of a access cover of a rear axle housing of the mining dump truck;
[00159] Figure 16 is a schematic diagram for another lock catch of a access cover of a rear axle housing of the mining dump truck;
[00160] Figure 17 is a schematic diagram for an electrical wheel of the mining dump truck;
[00161] Figure 18 is a schematic diagram for another electrical wheel of the mining dump truck;
[00162] Figure 19 is a schematic diagram for another electrical wheel of the mining dump truck;
[00163] Figure 20 is a schematic diagram for a front suspension cylinder component of
2018233039 21 Sep 2018 the mining dump truck;
[00164] Figure 21 is a schematic diagram for a ball pin of a front suspension cylinder component of the mining dump truck;
[00165] Figure 22 is a schematic diagram for another ball pin of a front suspension cylinder component of the mining dump truck;
[00166] Figure 23 is a schematic diagram for another front suspension cylinder component of the mining dump truck;
[00167] Figure 24 is a schematic diagram for a steering connection rod assembly of the mining dump truck;
[00168] Figure 25 is a schematic diagram for a track rod mounting members of a steering connection rod assembly of the mining dump truck;
[00169] Figure 26 is a schematic diagram for a mounting components of the mining dump truck;
[00170] Figure 27 is a schematic diagram for another mounting components of the mining dump truck;
[00171] Figure 28 is a schematic diagram for a fix piece of a mounting components of the mining dump truck;
[00172] Figure 29 is a schematic diagram for an electrical cabinet of the mining dump truck;
[00173] Figure 30 is a schematic diagram for a platform supporting device of the mining dump truck;
[00174] Figure 31 is a schematic diagram for another platform supporting device of the mining dump truck;
[00175] Figure 32 is a schematic diagram for another platform supporting device of the mining dump truck;
[00176] Figure 33 is a schematic diagram for a cab frame of the mining dump truck;
[00177] Figure 34 is a schematic diagram for a cab bottom plate of the mining dump truck;
[00178] Figure 35 is a schematic diagram for another cab bottom plate of the mining dump truck;
2018233039 21 Sep 2018 [00179] Figure 36 is a schematic diagram for a control station of the mining dump truck;
[00180] Figure 37 is a schematic diagram for a control box of the mining dump truck;
[00181] Figure truck;
[00182] Figure dump truck;
[00183] Figure dump truck;
is is is schematic schematic schematic diagram diagram diagram for for for a flexible ladder another flexible another flexible of the ladder ladder mining dump of the mining of the mining [00184] Figure 41 is a schematic diagram for a service ladder the mining dump truck;
[00185] Figure 42 is a schematic diagram for another service ladder of the mining dump truck;
[00186] Figure 43 is a schematic diagram for another service ladder of the mining dump truck;
[00187] Figure 44 is a schematic diagram for a hopper of the mining dump truck;
[00188] Figure 45 is a schematic diagram for another hopper of the mining dump truck;
[00189] Figure 46 is a schematic diagram for another hopper of the mining dump truck;
[00190] Figure 47 is a schematic diagram for another hopper of the mining dump truck; [00191] Figure 48 is a schematic diagram for a hopper of the mining dump truck;
[00192] Figure 49 is a schematic diagram for a lifting hydro-assembly of the mining dump truck;
[00193] Figure 50 is a schematic diagram for a lifting bearing of the mining dump truck;
[00194] Figure 51 is a schematic diagram for an engine exhaust mechanism of the mining dump truck;
[00195] Figure 52 is a schematic diagram for a dry-oil lubrication station control assembly of the mining dump truck;
[00196] Figure 53 is a schematic diagram for another dry-oil lubrication station control assembly of the mining dump truck;
[00197] Figure 54 is a partially enlarged view for a dry-oil lubrication station control assembly of the mining dump truck;
[00198] Figure 55 is a schematic diagram for a control box of the mining dump truck;
2018233039 21 Sep 2018 [00199] Figure 56 is a schematic diagram for a collection diagnose box of the mining dump truck;
[00200] Figure 57 is a schematic diagram for a hydro cooling assembly of the mining dump truck;
[00201] Figure 58 is a schematic diagram for a hydro-pump drive assembly of the mining dump truck;
[00202] Figure 59 is a schematic diagram for a hydro oil tank of the mining dump truck; [00203] Figure 60 is a schematic diagram for another hydro oil tank of the mining dump truck;
[00204] Figure 61 is a schematic diagram for a lamp assembly of the mining dump truck;
[00205] Figure 62 is a schematic diagram for a cooling air channel of the mining dump truck;
[00206] Figure 63 is a schematic diagram for an intake manifold of the mining dump truck;
[00207] Figure 64 is a schematic diagram for a wiring harness fixing assembly of the mining dump truck;
[00208] Figure 65 is a schematic diagram for a power cable fixing assembly of the mining dump truck;
[00209] Figure 66 is a schematic diagram for a fixing arrangement for generator’s damping strips and ring of the mining dump truck;
[00210] Figure 67 is a schematic diagram for a medium storage assembly of the mining dump truck.
[00211] Wherein:
[00212] frame assembly 1; main frame 11; lateral ridges 111; traverse beams 112; side frames 113; bumper 12; first erected plate 1201; second erected plate 1202; side plates 1203,1204; cover plate 1205; ribbed plates 1206; through-hole 1207; wiring hole 1208; bumper plateform 1209; vertical ladder mounting base 1210; inclined ladder mounting base 1211; rope ladder mounting base 1212;
[00213] travel assembly 2; front axle 21; rear axle 22; rear axle housing 221; first
2018233039 21 Sep 2018 mounting bases 2211; lug plates 22111; horizontal rotating shaft 22112; joint bearing 22113,22114; second mounting bases 2212; joint bearing 22115,22116; steel cylinder 2213; overhauling hole 22131; cable holes 22132; ventilation holes 22133; rear suspension cylinder supporters 2214; upper pull rod supporters 2215; first vertical plate 22151; second vertical plate 22152; third vertical plate 22153; fourth vertical plate 22154; pin hole 22155; forged ring 22156; lower pull rod supporters 2216; end-rings 2217; stiffened rib 22171; rear axle housing body 2218; first sewage discharging hole 22181; bumper bottom plate 2219; second sewage discharging hole 22191; sewage discharging pipe 22192; bumper rib plate 22193; access cover 222; lock catch 2221; lock catch base 22111; pin shaft 22212; screw lever 22213; flange 22214; card plank 22215; axial spring collar 22216; Electrical wheel pairs 223; motor 2231; main shaft 2232; output shaft 22321; coupling2233; rotating shaft 2234; first rotating shaft 22341; second rotating shaft 22342; first planet gear mechanism 22351; first sun gear 223511; first planet gears 223512; bearing 223513; first planet carrier 223514; studs 2235141; connecting plate 2235142; raised face 2235143; first ring gear 223515; first class ring gear 2235151; second class ring gear 2235152; fixed gear plate 2235153; bolt 2235154; sleeves 2235155; flange bolts 2235156; second sun gear 223521; second planet gears 223522; cylinder portion 2235221; cylinder-shaped protrusion portion 2235222; bearing 223523; second planet gear carrier 223524; studs 2235241; second planet carrier 223525; bolt 2235251; thrust end cover 2235252; copper thrust washer 2235253; rear axle casing member 224; rear axle casing 2241; first connection member 2242; second connection member 2243; connection rods 22431; rear wheels 225; hub 2251; hub outer ring 22511; hub connector 22512; rim 2252; outer rim 22521; inner rim 22522; rim intermediate ring 22523; wedge 22524; cooling member 226; suction pipe 2261; return pipe 2262; first cavity 2263; second cavity 2264; third cavity 2265; hydraulic pump 2266; sensor 2267; brake 227; fixed base 2271; friction plate 2272; movable friction plate 22721; fixed friction plate 22722; piston 2273; suspension cylinder mechanisms 23; upper pull rods 2314; rear suspension cylinders 2321; lower pull rods 2232; steering connection rod assembly 241; track rod 2411; track rod heads 2412; bottom portion 24121; extended portion 24122; track rod mounting members 2413; connection rod
2018233039 21 Sep 2018
24131; external threaded portion 241311; locking nut 24132;
[00214] platform assembly 31; mounting components 311; positioning shaft 3111; positioning piece 3112; top surface 31121; bottom surface 31122; left-side face 31123; right-side face 31124; fixing piece 3113; positioning slots 31131; arc segment 311311; straight-line segments 311312; platform 3114; main relay 3121; coil 31211; iron core 31212; armature 31213; housing 3122; bracket 31221; portal frame 3131; beam 31311; second pin roll through hole 313111; extending beam 3132; peripheral wall plate 31321; bottom wall plate 31322; first end plate 31323; first pin roll through hole 313231; rib plate 31325; intersecting hole 313251; mounting holes 313261; supporting piece 3133; supporting pin roll 31331; supporting base 31332; bottom beam 3134;
[00215] cab 32;; top frame 3211; horizontal frame 32111; top longitudinal beams 321111; top transverse beams 321112; inclined frame 32112; bottom frame 3212; bottom longitudinal beams 32121; two bottom transverse beams 32122; front beams 3213; rear beams 3214; operation table frame 3215; front support beam 3216; the rear support beam 3217; inclined front support beam 3218; inclined rear support beam 3219; cab bottom plate 322; upper bottom plate3221; lower bottom plate 3222; support posts 3223; wiring grooves 3224; separation plates 3225; openings 3227; control center 33; main operational area 3311; mounting opening 33111 for a steering lever; mounting opening 33112 for a load braking button; mounting opening 33113 for lifting operation lever; inclined operational area 3312; mounting opening 33121 for an emergency stop button; power interface 33122; auxiliary operation area 3313; mounting opening for a mirror heating button 33131; small storage box 33132; storage area 3314; box cover 33141; control box 3321; bottom plate 33211; first control plate 33212; second control plate 33213; the third control plate 33214; cover plate 33215; loudspeaker 33216; radio 33217; switch buttons 33218; ladder 34; flexible ladder 341; rigid paddle 3411; first mounting sleeve 34111; axle sleeve 34112; pin shaft 34113; elastic retaining washer 34121; side plates 3412; second mounting sleeve 34121; service ladde342; upper ladder 3421; lower ladder 3422; connecting member 3423; base 34231; lug 34232; lug link holes 34233; retaining block 3424; inclined surface 34241; planar surface 34242; handrest 3415; clamp connection assembly 3416; clamp connection holes 34161; clamp
2018233039 21 Sep 2018 pins 34162;
Specific Embodiments [00216] Further description is made in combination with specific exemplar embodiments so as to enable clearer description of the technical contents of the present invention. Obviously, the described embodiments are merely a part of the embodiments of the present invention, instead of exhaustive. An ordinary skilled person in the art can obtain, based on the embodiments of the present invention, all other embodiments which shall be obtained without making any creative effort, without departing from the protection scope of this application.
[00217] As used in this embodiment, “front” and “rear” mean a driving direction of a vehicle, with respect to which the position relationship between respective parts or components shall be understood. For example, “Component A is in front of Component B” means Component A is in front of Component B in the driving direction. Directional wordings like “rearward”, “downward” shall be understood in view of the driving state of a loaded dump truck. In addition, directional word “front” as used herein is based on a mining dump truck, i.e. it means the front direction of the mining dump truck body. Furthermore, “longitudinal” and “lateral” are also based on the mining dump truck body,
i.e. the axial direction of the truck body is defined as longitudinal direction, and a direction perpendicular thereto as lateral direction (left and right directions of the mining dump truck). It can be understood that the claimed protection scope of this application shall not be affected by adopting said directional words or wordings.
[00218] It is to be explained that the structure and operational principle and of the mining dump truck are completely identical with the prior art and thus can be effected by the skilled person in the art based thereon, so that detailed description is only made in the embodiments with respect to their improved structures.
[00219] As shown in Figs.l and 2, a mining dump truck is provided, comprising a frame assembly 1, a travel assembly 2, a cab assembly 3, a compartment assembly 4 and a power-train, wherein the travel assembly 2, cab assembly 3 and compartment assembly 4are provided integrally on the frame assembly 1 respectively, and the power-train
2018233039 21 Sep 2018 provides the travel assembly with power.
[00220] Fig.l is a schematic view of the structure of a mining damp truck according to this invention. As shown in Fig.l, the dump truck comprises a cab assembly 3 and a compartment assembly 4 provided on its frame assembly in sequence from the front to the rear side along a travelling direction, on which frame assembly a travel assembly 2, a hydraulic-electronic control system and drive assembly are provided via respective functional components, respectively.
[00221] Fig.2 is a schematic view of the structure of the frame assembly 1 of the mining dump truck according to the present invention. As shown in Fig.2, the frame assembly comprises a main frame, wherein the main frame is formed integrally by lateral ridges in pairs and traverse beams arranged in sequence between the lateral ridges, and is provided integrally with a bumper at its most front end along the travelling direction.
[00222] As a preferable embodiment shown in fig.3, four traverse beams 112 as above mentioned are provided, i.e. the first, second, third and fourth traverse beams, wherein the first traverse beam 1121 is used as connecting and supporting member between the cab assembly and frame assembly, the second traverse beam is used as connecting and supporting member between the travel assembly and frame assembly, and the third and fourth traverse beams 1123, 1124 are used as connecting and supporting member between the compartment assembly and frame assembly. To reduce the vehicle weight, the frame assembly is designed preferably in an embodiment as hollow structure which has a hollow internal structure enclosed by welded plates. The first traverse beam is connected with a plateform assembly, a cab and a control center of the cab assembly, and further is connected at its both ends respectively to one end (or the other) of a hydro-cylinder of a pair of first suspension cylinder. The second traverse beam is connected with a steering mechanism of the travel assembly, particularly by means of pin-sleeve connection. The third traverse beam 1123 is connected with a hopper of the compartment assembly and one end of a lift support of a lifting mechanism. The fourth traverse beam 1124 is connected with the other end of the lift support of the lifting mechanism of the compartment assembly and a first track rod of a second pair of suspension cylinder (bear suspension cylinder) assembly.
2018233039 21 Sep 2018 [00223] Shown as fig. 4 and 5, the bumper is of box-shaped structure comprising a first erected plate (front) 1201, a second erected plate (rear) 1202, two side plates 1203, 1204 provided at both sides of the first erected plate and a cover plate 1205 connected to upper ends of the first erected plate (front), the second erected plate (rear) and said two side plates. A ribbed plate is connected between the above-mentioned first (front) and second (rear) erected plates and the cover plate to further enhance the strength of the box-shaped bumper so as to avoid deformation of the bumper due to collision. One or more ribbed plates 1206 can be provided, e.g. four ribbed plates are provided in this embodiment, wherein the middle two of the ribbed plates 1206 adjacent to a central axis of the bumper (along the travelling direction of the vehicle) are solid. A relatively closed space can be formed by two solid ribbed plates in combination with the first and second erected plates and following parts of the frame so as to avoid communication of the interior of the bumper with the ambient atmosphere and thus rust in the interior of the bumper, so that the operational stability of the bumper is further guaranteed. Accordingly, based on the above structure, two distal ribbed plates have a through-hole 1207 at the middle portion for enhancing the strength and reducing the weight of the bumper to reduce the cost of the bumper. In addition, the above-mentioned cover plate 1205 is provided with a wiring hole 1208 for a battery casing at its middle portion, for extending lines for the battery casing in a vertical direction to rationalize the circuit layout. The cover plate 1205 has a width at its middle portion less than at its both sides, and both sides of the cover plate 1205, both sides of the front erected plate 1 and said two side plates 1203, 1204are connected to form two bumper plateform 1209. Said side plate 1203, 1204 is provided with at least one groove recessing towards the middle so as to form at least one running board. One or more such running board can be provided. With such structure, both sides of the box-shaped bumper are integrally formed with a temporary staying plateform for an operator to step on or off the dump truck, and because the running board is directly provided on the side plate 1203, 1204 of the plateform 1209, the bumper plateform 1209, running board and bumper are integrated with each other for better integrity, without need in welding the bumper plateform 1209 and the running board separately in comparison with the prior art. Therefore, the
2018233039 21 Sep 2018 procedures for manufacturing the dump truck are reduced and the production efficiency is increased. In view of these, a vertical ladder mounting base 1210or an inclined ladder mounting base 1211 is located above the bumper plateform 1209 for facilitating stepping onto the vehicle body thereby, wherein one end of the vertical ladder and/or inclined ladder is mounted on the bumper plateform 1209 and the other on the vehicle body. Further, it is also possible to mount a rope ladder mounting base 1212 beneath the bumper plateform 1209 for stepping onto the bumper plateform 1209 thereby. As a preferable variation for this embodiment, the above-mentioned first erected plate 1201, second erected plate 1202, two side plates 1203, 1204 and cover plate 1205 can be made by steel plates respectively, by welding which the bumper can be formed integrally, so that not only the requirement of bumper strength is met, but also the welding process is simple and reliable. The invention is not limited to steel structures, and other high strength structures such as copper structure can be adopted. The mounting process is also not limited to welding, and other connecting means like screw connection can be adopted, only if the required strength and simple and reliable process can be obtained thereby. It can be achieved in the finite element calculation that a rectangular body suffers less stress than a cylinder body with an equivalent cross section when both are applied with the same torque. In view of this, the box-shaped bumper in the mining dump truck according to this embodiment has an increased torsional rigidity, extended service life, reduced procedures and increased work efficiency, in comparison with a circular-pipe shaped bumper in prior art. It is to be explained that the directional wording “both sides” in this embodiment means the directions extending to the upper left and lower right respectively from the battery casing in Fig.9. It shall be appreciated that said directional wording is based on the figures of the description, without limiting the protection scope of this invention thereto.
[00224] It is worth mentioning that the dump truck according to this invention is differentiated from other dump truck in prior art in the improvement in rear axle connection components in the frame and travel assembly, i.e. by means of a creative design of a connection member (rear axle connection member) to improve the load situation of the frame and enhance the frame strength, wherein said connection member
2018233039 21 Sep 2018 comprises pairs of connection lug supports and connection beams connecting two connection lug supports, and in particular is of plate or tube shape and one-piece or multiple-part configuration. The specific structure of the connection beam can be selected in view of actual need. Furthermore, a pair of connection lug supports can be connected by the connection beam via welding, screwed connection, etc., which welding can be realized easily to obtain a stable structure. Preferably, the pair of lug supports are welded with enforcement plates at all sides so as to improve the load situation of the frame and enhance the frame strength, wherein the specific structure of the enforcement plates is dependent on actual structures of the lug supports and main frame and not limited herewith. As a preferable variation of this embodiment, the connection beam is in form of plate, and the pair of connection lug supports are passed independently through and connected with the side ridges of the main frame respectively. The pair of connection lug supports are connected integrally by the connection beam via welding. The enforcement plate preferably comprises annular welding lug supports which are provided in pairs respectively, the inner ring of which enforcement plate is welded to the circumference of the corresponding connection lug support , and the outer ring of which is welded to the inside of the lateral ridge. Another enforcement plate is arranged in the same way as the connection lug support. The first key improvement to the connection member is to connect the connection lug supports integrally by means of pairs of connection beams so as to balance the force components acting in the horizontal direction and in the left to right direction on the pair of connection lug supports for better load situation on the frame and higher frame strength. Another key improvement is to pass the pair of connection lug supports through the lateral ridge of the main frame from inside to outside and fix there by welding so as to obtain a more stable structure over the structure in prior art which is only welded at the inside of the frame.
[00225] As a preferable embodiment, the travel assembly comprises, along the vehicle travelling direction, a steering mechanism, braking devices, a front axle, a rear axle and suspension cylinder mechanisms, wherein the front axle, rear axle, suspension cylinder mechanisms, braking devices and steering mechanism are connected independently to the frame assembly respectively, and the steering mechanism is located in the front axle,
2018233039 21 Sep 2018 the braking devices are provided independently in the front and rear axles respectively, and the suspension cylinder mechanisms are also provided independently in the front and rear axles respectively. In addition, electrical wheel pairs are provided on the rear axle so as to obtain a complete transmission core part of the dump truck in which the electrical wheel pairs are driven by the power from the power assembly to drive the whole vehicle.
[00226] Any steering mechanism in prior art can be adopted, so no more details here. However, it is to be noted that in contrast to the prior art the steering mechanism in the dump truck according to this invention has a synchronous steering connection rod located directly below the main frame.
[00227] It is worth mentioning that the mining dump truck according to the present invention is improved with respect to a steering connection rod assembly in its steering mechanism. Referring to Figs. 24 and 25. The steering connection rod assembly 241 comprises a track rod 2411, two track rod heads 2412and two track rod mounting members 2413, wherein the two track rod heads 2412 are mounted on both ends of the track rod 2411 by said two track rod 2411 mounting members respectively. As shown in Figs.24and 25, one end of the track rod mounting member 2413in this embodiment is welded to the track rod, and the other is connected to the track rod head by screws, wherein the track rod mounting member includes a connection rod 24131 and a locking nut 24132, and in this case one end of the connection rod is fixed to the track rod by welding and the other is connected to the track rod head by screws with the locking nut screwed on the connection rod to lock the connection rod with the track rod head. Specifically, the track rod 2411 is a hollow steel tube and the track rod head 2412 is of a casting molded U-shaped structure, wherein the track rod head 2412 is provided at its bottom portion 24121 with internal threads adapted with external threads on the connection rod so as to effect screw connection with the track rod mounting member 2413. The connection rod is cylindrical with an external threaded portion 241311, onto and with which the locking nut 24132 is placed and connected. Furthermore, a handle portion is provided on the connection rod, which handle portion is embodied as projection with a hexagonal cross section extending in a circumferential direction of the
2018233039 21 Sep 2018 connection rod and perpendicularly to an axial planar surface of the connection rod. During the adjustment or mounting of the toe-in, this portion is rotated with a wrench to rotate the track rod or the track rod head. Alternatively, this portion is prevented from rotating when it is fixed by a wrench. It can be appreciated the projection on the track rod mounting member is not limited to the above-mentioned structure, if the required bearing strength, processing and assembly technique are achieved. In the track rod mounting member, an end face of the locking nut 24132 is abutted against an end face of the track rod 2411 to lock the screw connection between the connection rod and track rod 2411. In this embodiment, two side plates of the connection rod are provided at corresponding locations with mounting holes which can be selected as pin holes 24122 or bearing holes, etc. in view of various mounting elements, and a steering arm of the steering mechanism is located between said two side plates and rotatably connected to said two side plates by means of the mounting holes, and mounting elements like pin shaft and/or joint bearing is hinged to the track rod head 2412. The bottom potion of the track rod head 2412is formed on its interior wall with an extended portion 24122 extending towards an opening direction along a U-shaped structure, through which extended portion a threaded hole on the bottom portion 24121 which is in screw engagement with the connection rod is passed. That is, the connection rod is inserted through the extended portion 24122, and the extended portion has cross section with an area decreasing towards the opening direction along the U-shaped structure. The extended portion 24122 is in transitional connection with the interior wall of said two side plates by smooth curved surfaces so as to enhance the strength and impact resistance of the track rod head 2412. In the opening direction of the U-shaped track rod head 2412, the side plate of the track rod head in section is formed in sequence by a first straight portion, a second straight portion, a third straight portion and major arcs, wherein the first and third straight portions are parallel to each other and both at one end connected to the second straight portion and at the other end to the major arc by a smooth curve, with the mounting hole being concentric with the major arc. With such structure, the total weight of the steering tie rod assembly can be controlled within a smaller range, simultaneously while the length of the threaded hole and connection
2018233039 21 Sep 2018 reliability between the connection rod and the track rod head 241 are increased. Now in combination with Fig.24, the above-mentioned steering tie rod assembly 241 is assembled as follows: firstly, one end of the connection rod is welded to the track rod 2411, secondly, the track rod head 2412 is screwed on another end of the connection rod, and then the locking nut 24132 is screwed on the connection rod until its end face abuts against the outer wall of the bottom portion 24121 of the track rod head 2412. In contrast to the direct screw connection between the track rod head and the track rod 24111 in prior art, the track track rod 2411 in this invention can be in screw connection with two track rod head 2412 by the connection rod and then the connection rod and the track rod head 2412 are locked by the locking nut 24132, so that the track rod 2411 and track rod head2412can be connected easily, resulting in advantages of reliable connection and easy manufacturing and assembly regarding its structure. Further, one of the said two track rod heads 2412 is connected to the connection rod by left-handed screw connection, and the other is connected to a corresponding connection rod by right-handed screw connection. In other words, said two track rod head 2412 have opposite thread directions, so that following advantageous effects can be obtained thereby: one hand, the track rod 2411 can be screwed with two track rod head 2412 simultaneously when the track rod is rotated during assembly, so that the assembly efficiency is enhanced; on the other hand, the length of the steering tie rod assembly can be adjusted rapidly by rotating the track rod 2411 for the purpose of adjustment of toe-in.
[00228] The front axle 21 comprises a pair of front wheels 211, a front wheel shaft 212 and a pair of front brakes 213, wherein the pair of front wheels 211 and the pair of front brakes 213 are respectively fitted over the two ends of the front wheel shaft 212, which can specifically refer to the prior art, and will not be repeated herein. It is worth mentioning that for facilitating machining, effectively reducing the machining accuracy requirement, saving time and improving the structural strength, the present invention optimizes a structure of the front wheel shaft 212; and in addition, the front wheel shaft 212 in the front axle 21 is optimized to cooperate with the improvement of the front suspension cylinder component, so as to simplify the structure and improve the
2018233039 21 Sep 2018 structural strength. The implementation particularly comprises the following steps. A front suspension cylinder connecting block 2121 is additionally arranged within the front wheel shaft 212, and connected with the front suspension cylinder, a steering arm of the steering mechanism and a rotating shaft 2123 in the front wheel shaft 212 respectively. The difference with the prior art lies in that the connecting block 2121 is provided with a connecting through hole 21211 allowing a piston rod 23116 of the front suspension cylinder to penetrate through, the connecting through hole 21211 cooperates with the piston rod 23116 in a nested manner, and the piston rod 23116 is fixed via a fixing component at the opening edge of the connecting through hole 21211. Through the above arrangement, a machining process for integrally arranging a piston rod 23116 structure on the connecting block 2121 is effectively simplified, and the machining accuracy requirement on the front wheel shaft 212 is greatly reduced. Moreover, assembling and connecting of the front wheel shaft 212 and the front suspension cylinder are facilitated, and difficulty in assembling caused by a machining error of the piston rod 23116 is eliminated. Further, due to the front wheel shaft 212 with such a structure, the connecting strength of the front wheel shaft 212 is enhanced; unstable piston rod 23116 connection in the prior art is avoided; that is, if the front wheel shaft 212 with such a structure is adopted, once the connection between the piston rod 23116 and the front wheel shaft 212 fails, all that is needed is to replace a fixing and connecting component thereof or the piston rod 23116, without disassembling the whole front wheel shaft 212, so that the service life of the front wheel shaft 212 can be obviously prolonged by using the above-described design. As a preferred embodiment, the connecting block is of a block-shaped structure. As shown in Figure 6, the connecting block 2121 in the present embodiment is cuboid-shaped; the upper surface of the cuboid is provided with the connecting through hole 21211; and meanwhile, two adjacent side walls perpendicular to the upper surface are provided with fixing and connecting holes 21212 for being connected to the steering arm. The distance from the center of the connecting through hole 21211 to the wheel surface is predetermined. On one hand, the predetermined distance should meet the condition that the connecting through hole 21211 is sufficiently close to the wheel so as to enhance the compactness
2018233039 21 Sep 2018 of the structure; and on the other hand, the predetermined distance should be free from influence of the front suspension cylinder and the wheel hub. The fixing and connecting holes 21212are fixing and connecting threaded holes, and cooperate with fastening bolts to connect the steering arm and the front wheel shaft 212. By applying the cuboid connecting block 2121 in the present embodiment, not only can the steering arm be reliably connected to two adjacent planes to effectively improve the connecting stability and reliability, but also a corresponding steering arm junction surface is further simplified, the machining difficulty for the steering arm junction surface is reduced, and the machining efficiency is improved. In the present embodiment, the fixing and connecting hole 21212 is not only limited to a threaded hole, and a fastener is not limited to a fastening bolt; instead, they may be other fixing and connecting holes and fasteners which can cooperate with each other and are capable of fixedly connecting the steering arm and the front wheel shaft 212. It should be noted that the cuboid connecting block 2121 in the present invention is just taken as an example; of course, the connecting block may be of other cuboid structures, such as a cube, so long as it can form a connecting plane for connecting the steering arm. Thus, the specific structures of the connecting block do not limit the claimed technical schemes of the present application. In a specific embodiment, a fixing assembly comprises a plurality of bolts and a plurality of fixing through holes 21213 formed at the opening edges of the connecting through holes 21211. Accordingly, a snap ring clamped outside the connecting through hole 21211 is arranged along the circumference of the piston rod 23116, and provided with threaded holes allowing the bolts to be screwed in. So, the bolt is inserted into the corresponding fixing through hole 21213 from the lower portion of the front wheel shaft 212 upwards, and then screwed in the corresponding threaded hole in the piston rod 23116, so as to fixedly connect the front wheel shaft 212 and the piston rod 23116. In the present embodiment, preferably, the fixing through hole 21213adopts a circular opening; of course, the fixing through holes 21213 are not limited thereto herein, and may be square holes, polygonal holes and the like, so long as they can allow the corresponding bolts to be inserted to connect the front wheel shaft 212 the piston rod 23116. Therefore, the specific structures of the fixing through holes 21213 do not limit
2018233039 21 Sep 2018 the claimed technical schemes of the present application. In order to more effectively fix the piston rod 23116 and improve the connecting stability, the fixing through holes fixing through holes 21213 are uniformly distributed in the opening edge of connecting through hole 21211. In the above embodiment, the design of the front wheel shaft 212 may be further optimized. As shown in Figure 6, the surface where the connecting through hole 21211 is formed, of the connecting block 2121 is provided with lightening holes 212111, so as to reduce the overall weight of the front wheel shaft 212 while satisfying the structural strength requirement on the front wheel shaft 212. Specifically, the lightening holes 212111 are formed close to the end connected to a front wheel rotating shaft 2123. In the present embodiment, there are three lightening holes 212111 which are arranged in parallel. The lightening holes 212111 are designed according to the actual strength requirement on the front wheel shaft 212, so as to enable the front wheel shaft 212 to meet a light weight requirement while meeting the strength requirement. The design of the front wheel shaft 212 in the present invention can be further optimized. As shown in Figure 6, the front wheel shaft 212 further comprises a brake caliper bracket 2122 integrally arranged with the connecting block 2121 and the front wheel rotating shaft 2123. Through such an arrangement, complicated operations for connecting the brake caliper bracket 2122 with the front wheel rotating shaft 2123 can be eliminated, and the number of bolts for connecting can be substantially reduced. Meanwhile, the strict machining accuracy requirement on a mounting and connecting part when machining the brake caliper bracket 2122 can be avoided, and working performances, such as stability and the reliability, of the brake caliper bracket 2122 are improved. It should be noted that above orientation terms “left” and “right” refer to extending directions towards two ends of an axis of the front wheel rotating shaft of the front wheel shaft 212. The orientation term “upper” means one side, when connected with the front suspension cylinder, of the front wheel shaft 212, namely, the upward direction shown in Figure 6. It should be understood that the orientation terms are set based on the drawings of the description, and should not affect the protection scope of the present patent.
[00229] The suspension cylinder mechanism is divided into a front suspension cylinder
2018233039 21 Sep 2018 component and a rear suspension cylinder component which are respectively arranged at the front and rear axles 21, 22. The suspension cylinder mechanism is configured to support the front axle 21, specifically the front wheels 211 and the front shafts 212, from the automotive frame assembly. The function of the suspension cylinder mechanism is to absorb vibrations when the truck is running on an uneven road surface.
[00230] Different from the prior art, the present invention adopts an independent suspension structure for a heavy-duty dump truck for the first time to greatly improve the comfort and stability. This invention mainly aims to provide a front suspension cylinder component for a mining dump truck. The front suspension cylinder component enables a suspension cylinder to be free from lateral forces, avoids the change of a distance between a front shaft and a rear shaft due to tire bouncing, reduces tire wear and prolongs the service life of the tire.
[00231] It should be noted that the orientation term “external end” in this application refers to the left ends of the upper and lower transverse arms 2312 and 2313 in Figure 4. The term “internal end” indicates the right ends of the upper and lower transverse arms 2312 and 2313 in Figure 4. The terms “front” and “rear” refer to a truck traveling direction and the opposite direction thereof, and “left” and “right” refer to the “left” and “right” directions sensed in a cab. It should be understood that these terms are set based on a driver’s habits and the drawings of the description.
[00232] In the present embodiment, as shown in Figure 20 to Figure 23, the front suspension cylinder component comprises a suspension cylinder 2311, a first transverse arm (the upper transverse arm) 2312 and the second transverse arm (the lower transverse arm) 2313. A top end of the suspension cylinder and the automotive frame assembly of the mining dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; an external end of the upper transverse arm 2312 and an upper end of a front wheel shaft 212 of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; an external end of the lower transverse arm 2313 and a lower end of the front wheel shaft 212 of the dump truck are capable of rotating leftwards or rightwards and swinging upwards and downwards; and an internal end of the upper transverse arm 2312 and that of the lower transverse arm
2018233039 21 Sep 2018
2313 are connected with the automotive frame assembly respectively.
[00233] Compared with a candle suspension frame in the prior art, the suspension cylinder 2311 and the front wheel shaft 212 are connected movably instead of being fixedly connected, so in a traveling process of the truck, lateral forces in action forces from the ground to tires and additional loads generated by steering and braking are all home by the upper and lower transverse arms 2312 and 2313. Therefore, when the truck is in all driving conditions, the suspension cylinder only needs to bear an axial load; that is, the suspension cylinder is of a two-force bar structure, thereby greatly improving the stress condition of the suspension cylinder, prolonging the service life of the suspension cylinder, and reducing routine cylinder maintenance work.
[00234] Compared with a single longitudinal arm suspension frame in the prior art, the transverse arms swing not around the pin shafts arranged at the left and right sides, but upwards and downwards around the pin shafts arranged at the front and rear sides. In addition, changes of a distance between the front wheels caused in a swinging process of the transverse arms are avoided by motion synthesis at the external ends of the upper and lower transverse arms. Therefore, the suspension frame avoids the changes of a distance between a front shaft and a rear shaft caused by tire bouncing and the changes of a distance between a left wheel and a right wheel, thereby reducing tire wear and prolonging the tire service life.
[00235] As a preferred embodiment, an external end of an upper transverse arm 2312 is hinged with an upper end of a front wheel shaft 212 via a ball pin 23114. Through such a structure, the external end of the upper transverse arm 2312 is ball-hinged with the upper end of the front wheel shaft 212, so that the external end of the upper transverse arm 2312 is capable of moving flexibly in all directions relative to the upper end of the front wheel shaft 212; functions that the external end of the upper transverse arm 2312 can rotate leftwards or rightwards and swing upwards and rightwards relative to the front wheel shaft 212 are realized; the support flexibility of the upper transverse arm 2312 to the front wheel shaft 212 is improved; and the suspension cylinder is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
too
2018233039 21 Sep 2018 [00236] It is conceivable that the upper transverse arm 2312 and the upper end of the front wheel shaft 212 may be connected in another manner. For example, they may be connected by a joint bearing.
[00237] In another specific embodiment, an external end of the lower transverse arm 2313 and a lower end of the front wheel shaft 212 are connected by a first joint bearing 23111. Since the joint bearing is composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, the external end of the lower transverse arm 2313 and the lower end of the front wheel shaft 212 can rotate leftwards or rightwards via the first joint bearing 23111. As the rotating surface is spherical, the external end of the lower transverse arm 2313 and the lower end of the front wheel shaft 212 can swing upwards and downwards within a certain angle. Thus, flexible support of the lower transverse arm 2313 to the lower end of the front wheel shaft 212 is realized. Of course, the external end of the lower transverse arm 2313 and the lower end of the front wheel shaft 212may be hinged via a ball pin 23114 to rotate leftwards or rightwards and swing upwards and downwards to the greatest extent.
[00238] In another specific embodiment, a bottom end of the suspension cylinder 2311 and an external end of the above upper transverse arm are connected by a second joint bearing 23112. A function, same as that of the above first joint bearing 23111, of the second joint bearing 23112 is that the bottom end of the suspension cylinder 2311 and the external end of the above upper transverse arm are capable of rotating leftwards or rightwards and swinging upwards and downwards, so that the suspension cylinder 2311 can rotate flexibly relative to the upper transverse arm 2312. Therefore, the suspension cylinder 2311 is protected from bearing lateral forces in action forces from the ground to tires and additional loads generated by steering and braking.
[00239] Fikewise, the bottom end of the suspension cylinder 2311 can be hinged with the external end of the upper transverse arm 2312 via other hinge members, such as a ball pin 23114, so as to realize the same function.
[00240] In addition, a top end of the suspension cylinder 2311 and an automotive frame assembly are connected by a third joint bearing 23113. Same as the above joint bearings, via the third joint bearing 23113, the top end of the suspension cylinder 2311 and the
101
2018233039 21 Sep 2018 automotive frame are capable of rotating horizontally and swinging upwards and downwards. Similarly, the top end of the suspension cylinder 2311 and the automotive frame may be hinged via a ball pin 23114.
[00241] In another specific embodiment, the upper and lower transverse beams 2312 and 2313 are not equal in length. The lengths thereof are acquired by optimizing the minimum wheelbase change and the minimum tire tilting angle change as an objective function in a tire bouncing process. In such a way, the lengths of the upper and lower transverse beams are reasonably optimized, so that changes of wheel base and tire dip angels are greatly reduced in the tire bouncing process and the tire wear is reduced. Therefore, compared with a suspension frame with two equal-length transverse beams, good driving stability of the truck can be ensured by adopting the two unequal-length transverse beams.
[00242] In another specific embodiment, the inner ends of the upper and lower transverse beams 2312 and 2313 are hinged with pin shafts of the automotive frame respectively via copper bushes 23121. In this structure, the pin shafts of the automotive frame are arranged within the copper bushes at the two ends of the upper and lower transverse beams 2312 and 2313, so that the upper and lower transverse beams 2312 and 2313 can be connected with the automotive frame. In addition, due to less hardness, when in use, the copper bushes will be worn firstly, so in a repair process, all that is needed is to replace the copper bushes. On this basis, a thrust washer may be sandwiched between the copper bush and the automotive frame to avoid direct contact of the transverse beams with the automotive frame, so as to reduce the wear of the automotive frame and the transverse beams.
[00243] As shown in Fig7 to 9, the rear axle suspension system of the large-scale mining dump trucks according to the present invention comprises a rear axle housing 221, a frame and a suspension. Wherein the rear axle housing 221 is connected to the frame of the dump trucks, such as side frames, a traverse beam at the upper rear-end of the frame and a traverse beam at the bottom rear-end of the frame etc, by means of the suspension. The suspension comprises a upper suspension part and a lower suspension part; wherein the lower suspension part comprises two lower pull rods, one end of which
102
2018233039 21 Sep 2018 is hinged by means of swivel to front-lower part of the rear axle housing 221, and the other end of which is hinged by means of swivel to the traverse beam at the bottom rear-end of the frame. The upper suspension part comprises two upper pull rods 2314, one end of which is hinged by means of swivel to the upper part of the rear axle housing 221, and the other end of which is hinged by means of swivel to the frame, and two rear suspension cylinders 232, one end of which is hinged by means of swivel to the rear part of the rear axle housing 221, and the other end of which is hinged by means of swivel to the traverse beam at the upper rear-end of the frame. The rear suspension cylinders offer elasticity for the rear axle to ease the vehicle’s vibration.
[00244] As used in this embodiment, “front” and “rear” all refer to the driving direction of a vehicle. The front-lower part of the rear axle housing 221 means the front and lower position of the rear axle housing 221.The lower pull rods are connected to the front-lower part of the rear axle housing 221 so that the lower pull rods will be in a state of high front and low back when the rear axle housing 221 is completely installed with the traverse beam at the bottom rear-end of the frame, and most parts of the rear axle housing 221 are located above the position at which the rear axle housing 221 and the lower pull rods are connected to each other. So it is more conductive to lift the roll center of the dump trucks, and the higher roll center can help to ease the vibration and shaking when the axle rotates around the vertical axis. Such a design allows the driving force and braking force of rear wheels can be transferred through the upper suspension part to the frame on the one hand, and also can be transferred through the two lower pull rods connected to the traverse beam at the bottom rear-end of the frame to the frame on the other. There are two force application points between the traverse beam at the bottom rear-end of the frame and the lower pull rods, which optimizes the load of the traverse beam at the bottom rear-end of the frame either in the respects of directions or intensity of force, so that it avoids the damage to the traverse beam at the bottom rear-end of the frame caused in the case that the driving force and braking force of the large-scale dump trucks is relatively great and focuses on one stress point. The lower pull rods with simple structure can not only transfer force stably but also reduce the space occupied by the suspension.
103
2018233039 21 Sep 2018 [00245] Specifically, the rear axle housing 221 is provided with two first mounting bases 2211 for installing the lower pull rods. The first mounting base 2211 comprises a pair of opposing lug plates connected with the body of the rear axle housing 221, between which rotating shaft is inserted. A joint bearing 22113 is installed on the rotating shaft, the inner ring of which is connected to the rotating shaft and the outer ring of which is connected to the lower pull rods. The lower pull rods and the rear axle housing 221 are hinged by the joint bearing 22113 by means of swivel. The relative rotation of the inner ring and outer ring of the joint bearing 22113 makes the lower pull rods rotate with respect to the rear axle housing 221. And because the lower pull rods have to load more weight of the rear axle, the first mounting base 2211 provides stably installed base and appropriate rotary scope by a pair of lug plates and the horizontal rotating shaft for the lower pull rods, and the lower pull rods can securely connect to the rear axle housing 221. In addition, the end of the lower pulling rod connected with the traverse beam at the bottom rear-end of the frame is provided with a pair of opposing lug plates, a joint bearing 22114 and a rotating shaft inserted horizontally between the pair of lug plates. The inner ring of the joint bearing 22114 is connected to the rotating shaft and outer ring is used to connecting with the traverse beam at the bottom rear-end of the frame. Accordingly, one end of the lower pull rod which is connected to the outer ring of the joint bearing 22113 has different structures from the other end connected to the inner ring of the joint bearing 22114; wherein the structure of the former is that the body of the lower pull rod is provided with a circular opening matched with the joint bearing, and the structure of the latter is that the body of the lower pull rod is provided with a pair of lug plates matched with the rotating shaft. The end which is provided with lug plates has larger dimension, and it can further improve the whole 22132trength of the lower pull rod.
[00246] An upper pull rod 2314 is connected to the top of the rear axle housing 221. The driving force and the braking force of the rear axle can be transferred to the frame through two upper pull rods 2314. The driving force and the braking force of the rear axle acts on the frame through four stress points comprising the two connection points between the lower pull rods and the traverse beam at the bottom rear-end of the frame
104
2018233039 21 Sep 2018 and the two connection points between the upper pull rods 2314 and the frame. So it further optimizes the stress state of the whole frame and improves the connection reliability of the rear axle. Of course, other structures of the upper suspension part, such as the structure of tripod with one vertex is hinged by means of swivel to the rear axle housing 221 and the other two vertexes are connected to the frame by rotating or other forms, can be adopted, only if the structure can keep stable.
[00247] Specifically, the rear axle housing 221 is provided with two second mounting bases 2212 for installing the upper pull rods 2314. One end of the upper pull rod 2314 which is connected to the rear axle housing 221 has a pair of opposing lug plates between which a horizontal rotating shaft is inserted; wherein the rotating shaft is connected to the inner ring of a joint bearing 22115, and the second mounting base 2212 is connected to the outer ring of the joint bearing 22115. The upper pull rod 2314 is hinged by means of swivel to the rear axle housing 221 by the joint bearing 22115, and appropriate rotary scope is obtained by the structures of the rotating shaft, the joint bearing 22115 and the lug plates for the upper pull rod 2314. Specifically, two rotating shafts installed respectively in the two second mounting bases 2212 separately deviates from the axis of the rear axle housing 221 a predetermined angle in clockwise and counterclockwise directions, so that the two upper pull rods 2314 can be naturally opened along driving direction: that is also open from back to front. The two rotating shafts installed respectively in the two first mounting bases 2211 are parallel to the axis of the rear axle housing 221, so that the two lower pull rods can be parallel to each other along the driving direction in the state of natural. The other end of the upper pull rod 2314 connected to the frame is provided with a pair of opposing lug plates, a rotating shaft vertically inserted between the lug plates and a joint bearing 22116 connected to the rotating shaft, wherein the inner ring of the joint bearing 22116 is connected to the rotating shaft and the outer ring is connected to the frame. So both ends of the upper pull rod 2314 are provided with a pair of opposing lug plates, one pair of which used to connect with the rear axle housing 221 is arranged vertically to match with the horizontal rotating shaft, and the other pair of which used to connect with the frame is arranged horizontally to match with the vertical rotating shaft. Because the
105
2018233039 21 Sep 2018 upper pull rod 2314 with two ends having lug plates has larger dimension, it has better strength and improves the connection reliability. Furthermore, the rotating shafts matched with the two pairs of lug plates are arranged respectively vertically and horizontally, and the two rotating shafts have different arrangement directions, so the two pairs of lug plates also have different arrangement directions, which are conductive to maximize the rotational degrees of freedom of the joint bearing and enhance the performance of anti-torsion to equilibrate the roll differences on both sides of the vehicle.
[00248] Thus, the upper pull rods 2314 pull rods 2314 and the lower pull rods are not parallel to each other, and the four pull rods can be combined to a stable structure with the rear axle housing 221 and the frame. The upper pull rods 2314 pull rods 2314 can also play a role of transverse rods as in the prior vehicle suspension system, which can prevent the vehicle from rollover when driving around a comer with excessive roll.
[00249] Two rear suspension cylinders are hinged by means of swivel to the back of the rear axle housing 221 so that the rear suspension cylinders can be connected to the rear axle housing 221 by two connection points to transfer the weight of rear axle springs dispersedly to the rear axle housing 221 together with the upper pull rods 2314pull rods 2314 and the lower pull rods , and the weight can be transferred to the rear axle through six stress points, which makes the frame and the rear axle housing 221 have better loading states. Furthermore, the upper pull rods 2314pull rods 2314 and the lower pull rods can also be provided with a lightening hole, which makes the upper pull rods 2314 pull rods 2314 and the lower pull rods not only transfer force stably, but also have less weight.
[00250] The rear axle housing 221 further comprises a cannular housing made from a steel plate by rolling and welding (that is a steel cylinder 2213), two rear suspension cylinder supporters 2214, two lower pull rod supporters 2216, two end-rings concentric to the steel cylinder 2213 and fixedly connected to both ends of it, and upper pull rod supporters 2215 arranged on the steel cylinder 2213. The steel cylinder 2213 is provided with an overhauling hole 22131, cable holes 22132 and ventilation holes 22133. Specifically, the rear axle housing is provided with two ventilation holes 22133 and one
106
2018233039 21 Sep 2018 overhauling hole 22131 that are symmetrically arranged relative to the centerline of the steel cylinder 2213, which can minimize impact on the stiffness of the steel cylinder 2213 because of the machined holes and ensure the strength of the steel cylinder 2213 along its circumferential direction keep the broadly same. It can prevent the steel cylinder 2213 from premature broken because of local lower strength to extend its service life. In addition, there are two cable holes 22132 which are arranged at the position near the ventilation holes 22133 in this embodiment because the hole diameter of the cable hole 22132 and the ventilation holes 22133 of the rear axle housing are smaller than that of the overhauling hole 22131, which ensure the strength of the steel cylinder 2213 along its circumferential direction keep the broadly same. It can prevent the steel cylinder 2213 from premature broken because of local lower strength to extend its service life. Of course, the numbers and the arrangement positions of the overhauling hole 22131, the cable hole 22132 and the ventilation hole 22133 can be changed according to its structural features of the mining dump trucks on the basis of meeting the requirements of usage, machining and assembly process. The two rear suspension cylinder supporters 2214 are respectively fixedly connected to the two end-rings 2217 symmetrically relative to the steel cylinder 2213. Specifically, each rear suspension cylinder supporter2214 comprises two vertical plates that are parallel to each other and welded to the periphery wall of the end-rings 2217; wherein an arcual welding surface adapted to the periphery wall of the end-ring 2217 is provided in each vertical plate, and pin holes are provided at the corresponding positions of the two vertical plates. The rear suspension cylinder supporter 4 is hinged to the two vertical plates by a pin shaft adapted to the pin hole. Similarly, the two lower pull rod supporters 2216 are respectively fixedly connected to the two end-rings 2217 symmetrically relative to the steel cylinder 2213.The two rear suspension cylinder supporters 2214 and the two lower pull rod supporters 2216 in this embodiment are arranged symmetrically relative to the centerline of the steel cylinder 2213, which can further optimize the stress state of the rear axle housing to extend its service life. In addition, a stiffened rib is additional provided between the two vertical plates in this embodiment to further enhance the strength of the rear suspension supporter 2214. Specifically, the stiffened rib is a curved
107
2018233039 21 Sep 2018 plate made of steel plate by means of banding molding and extending along the length direction of the vertical plate. Similarly, the two lower pull rod supporters 2216 are respectively arranged on the two end-rings 2217 symmetrically relative to the steel cylinder 2213. Specifically, each lower pull rod supporter 2216comprises two vertical plates that are parallel to each other and welded to the periphery wall of the end-rings 2217; wherein an arcual welding surface adapted to the periphery wall of the end-ring 2217 is provided in each vertical plate, and pin holes are provided at the corresponding positions of the two vertical plates. The lower pull rod supporter 2216 is hinged to the two vertical plates by a pin shaft adapted to the pin hole. A stiffened ribbed plate is additional provided between the two vertical plates in this embodiment to further enhance the strength of the lower pull rod supporter. Specifically, the stiffened ribbed plate is a curved plate made of steel plate by means of banding molding and extending along the length direction of the vertical plate. The end-rings 2217 are forged rings of which the strength and impact resistance are superior to the prior arts comparing to the rolled cannular steel cylinder 2213 or the end-rings made of rolling and welding process or other machining processes, which can optimize the stress of the whole rear axle housing. Furthermore, the inner wall of the end-ring 2217 is provided with multiple stiffened ribs 6 in order to enhance the strength and the impact resistance of the rear axle housing. Specifically, the multiple stiffened ribs each of which is annular are connected to each other by welding at intervals successively along the centerline of the end-ring 2217.lt is worth mentioning that the stiffened ribs integrate with the end-ring 2217, which are made of lathe machining after forging. Understandably, the annular stiffened rib 22171 makes the end-ring 2217 being stressed uniformly, which further optimizes its mechanical properties. Of course, the stiffened ribs 6 of the end-ring 2217 can also be other structures that often used by the skilled person in the art on the basis of meeting the requirements of enhancing the strength and impact resistance of the end-ring 2217, machining and assembly processes. It is worth mentioning that the two end-rings 2217 are welded to the steel cylinder 2213, so it has high connection reliability and make the weight of the whole rear axle housing light, which make the own weight of the mining dump truck light and lead to the light mining dump truck a large loading capacity. Of
108
2018233039 21 Sep 2018 course, the end-ring 2217 can also be fixedly connected to the steel cylinder 2213 by means of threaded connection, rivet connection or adhesive joining on the basis of meeting requirements of connection reliability and assembly processes between the two. Upper pull rod supporters 2215 comprise two vertical plates that are arranged at interval to each other and welded to the periphery wall of the steel cylinder 2213; wherein pin holes are provided at the corresponding positions of the two vertical plates. The upper pull rod is hinged to the two vertical plates by a pin shaft adapted to the pin hole. A stiffened rib 22171 is additional provided on the upper pull rod supporter 2215 in this embodiment to further enhance the strength of the upper pull rod supporter 2215 which is welded to the both vertical plates and the rear axle housing. Specifically, the cross sectional area of the vertical plate in the direction of the upper pull rod pointing to the rear axle housing increases progressively. The external profile of the vertical plate comprises a top circular arc segment, a bottom circular arc segment and a straight segment connecting right-most side of the above two segments. Such a design can decrease weight of the upper pull rod supporter 2215 on the one hand on the basis of meeting the requirements of connection strength between the upper pull rod and the supporter. Because the sum of the own weight and the loading capacity of the mining dump truck is a constant value, the lighter upper pull rod supporter 2215 certainty decreases the own weight of the whole mining dump truck, which leads to increase its loading capacity. On the other hand, such a design can increase the welding area of the vertical plate as much as possible to enhance the connection strength and reliability between the upper pull rod and the supporter. Furthermore, the external profile of the vertical plate can also comprise a top circular arc segment, a bottom circular arc segment and a smooth curve segment connecting right-most sides of the above two segments. Similarly, such a design can decrease weight of the upper pull rod supporter 2215 on the one hand on the basis of meeting the requirements of connection strength between the upper pull rod and the vertical plate supporter. Because the sum of the own weight and the loading capacity of the mining dump truck is a constant value, the lighter upper pull rod supporter 2215 certainty decreases the own weight of the whole mining dump truck, which leads to increase its loading capacity. On the other hand, such a design can
109
2018233039 21 Sep 2018 increase the welding area of the vertical plate as much as possible to enhance the connection strength and reliability between the upper pull rod and the supporter. Moreover, it can decrease the stress concentration of the vertical plate by means of the smooth curve segment connecting the top circular arc segment and the bottom circular arc segment, which enhances its impact resistance. It is worth mentioning that the rear suspension cylinder supporter 2214, the lower pull rod supporter 2216 and the upper pull rod supporter 2215in this embodiment are all made of welded assemble plates with simple structures, low production costs and higher strength and impact resistance. In addition, the welded connection has high connection reliability and also keeps the weight of whole the rear axle housing lighter, which allows the own weight of the mining dump truck lighter. The lighter own weight of the mining dump truck can certainty lead to the larger loading capacity. Of course, the two can also be fixedly connected to each other by means of threaded connection, rivet connection or adhesive joining on the basis of meeting requirements of connection reliability and assembly processes between the two.
[00251] Conclusively, the rear axle housing 221 in this embodiment is made by assembling a steel cylinder 2213 and end-rings 2217, which enhances its strength and impact resistance comparing to the steel cylinder 2213 made of steel plate rolling and welding in the art. Furthermore, the two rear suspension cylinder supporters 2214 and the two lower pull rod supporters 2216of the rear axle housing are all respectively symmetrically fixedly connected to the end-ring 2217, and the structures loaded smaller external impact, such as the overhauling hole 22131, the ventilation holes 22133, and the cable hole 22132 etc are all arranged on the steel cylinder 2213, which makes the rear axle housing have compact structure, distributed force and better mechanical properties.
[00252] It is worth mentioning that an improvement is done to the above upper pull rod supporter in the present invention. Shown in fig. 10 and 11, the upper pull rod supporters comprise two pairs of vertical plates welded to the peripheral wall of the rear axle housing, which are respectively arranged correspondingly to the two upper pull rods of the mining dump truck, and are hinged by pin shafts. Each vertical plate of the two pairs is welded to the periphery wall of the rear axle housing through its bottom surface. The
110
2018233039 21 Sep 2018 bottom surface is in particular a circular arc surface adapted to the periphery wall of the rear axle housing. Specifically, the two pairs of vertical plates in particular comprise a first vertical plate 22151, a second vertical plate 22152, a third vertical plate 22153 and a fourth vertical plate 22154; wherein the first vertical plate 22151 and the second vertical plate 22152are arranged in parallel and both of the bottom surfaces are welded to the periphery wall of the rear axle housing. Similarly, the third vertical plate 22153 and the fourth vertical plate 22154 are arranged in parallel and both of the bottom surfaces are welded to the periphery wall of the rear axle housing. During assembling process, first, adjusting the relative position of the two pairs of vertical plates according to the specific position of the two upper pull rods of the mining dump truck; and then, welding the circular arc welded surface one by one; and then, machining pin holes 22155 at the corresponding position of each pair of vertical plates; finally, inserting the upper pull rod into the two vertical plates and hinging to the two vertical plates by a pin shaft adapted to the pin hole 22155.Absolutely, the upper pull rod supporter in this embodiment has a structure of multiple vertical plate all welded to the rear axle housing with distributed force and high strength. Furthermore, the welded surfaces of all vertical plates welding to the periphery wall of the rear axle housing are circular arc surfaces, which make the positioning of welding simple, accurate and the assembling efficiency high. Further, the cross sectional area of the vertical plate in the direction of the upper pull rod pointing to the rear axle housing increases progressively. The external profile of the vertical plate comprises a top circular arc segment, a bottom circular arc segment and a straight segment connecting right-most sides of the above two segments. Such a design can decrease weight of the upper pull rod supporter on the one hand on the basis of meeting the requirements of connection strength between the upper pull rod and the vertical plate supporter. Because the sum of the own weight and the loading capacity of the mining dump truck is a constant value, the lighter upper pull rod supporter certainty decreases the own weight of the whole mining dump truck, which leads to increase its loading capacity. On the other hand, such a design can increase the welding area of the vertical plate as much as possible to enhance the connection strength and reliability between the two.
Ill
2018233039 21 Sep 2018 [00253] In another preferred embodiment, the external profile of the vertical plate can also comprise a top circular arc segment, a bottom circular arc segment and a smooth curve segment connecting right-most sides of the above two segments. Such a design can decrease weight of the upper pull rod supporter on the one hand on the basis of meeting the requirements of connection strength between the upper pull rod and the vertical plate supporter. Because the sum of the own weight and the loading capacity of the mining dump truck is a constant value, the lighter upper pull rod supporter certainty decreases the own weight of the whole mining dump truck, which leads to increase its loading capacity. On the other hand, such a design can increase the welding area of the vertical plate as much as possible to enhance the connection strength and reliability between the upper pull rod and the supporter. Moreover, it can decrease the stress concentration of the vertical plate by means of smooth curve segment connecting with the top circular segment and the bottom circular segment, which enhances its impact resistance. It is worth mentioning that the vertical plates are all axially symmetric with respect to the diameter of the pin hole 22155 with symmetric structure, uniformly stress and better mechanical proprieties. Understandably, the vertical plates can also be other shapes different from this embodiment on the basis of meeting the requirements of loading capacity, machining and assembling process. Furthermore, as shown in figures, the vertical plate are welded with a forged ring 22156 concentric with the pin hole 22155, of which the diameter is smaller than that of the pin hole 22155. The pin shaft is connected to the vertical plate by the forged ring 22156. Usually, the forged ring 22156 is made from steel with high strength and good wearing resistance, the stiffness and the thickness of which are all greater than that of the vertical plate. The pin shaft 22156 can be matched with the vertical plate by the forged ring 22156, which can enhance its bearing strength. That the pin shaft matching with the forged ring 22156 can decrease wearing of the vertical plate on the one hand, and on the other it can minimizes the requirements respect to wearing resistance and other related performance parameters to control the production cost of the upper pull rod supporter. Of course, the pin hole 22155 can also be matched with the pin shaft directly on the basis of meeting the requirements of strength and wearing resistance. The upper pull rod supporter further comprises a
112
2018233039 21 Sep 2018 stiffened ribbed plate 22157 which are welded to the peripheral wall of the rear axle housing and the four vertical plates. Specifically, the stiffened ribbed plate 22157 is welded to the peripheral wall of the rear axle housing through the bottom surface, and is welded to the four vertical plates through side surface. In a preferred embodiment, the stiffened ribbed plate 22157 is welded to the vertical plate after forming circular segments adapted to the lateral and top surfaces of the vertical plate by bending or rolling-bending. During the assembling process, first, adjusting the relative position of the two pairs of vertical plates according to the specific position of the two upper pull rods of the mining dump truck; and then, welding the circular arc welded surface one by one, and melding the stiffened ribbed plate 22157 to the corresponding position of the rear axle housing and the vertical plate; and then, machining pin holes 22155 at the corresponding position of each pair of vertical plates; finally, inserting the upper pull rod into the two vertical plates and hinging to the two vertical plates by a pin shaft adapted to the pin hole 22155. Understandably, the strength of the upper pull rod supporter can be further enhanced after being additionally provided with the stiffened ribbed plate 22157, which further enhance the connection reliability of the rear axle housing and the upper pull rod. It is worth mentioning that the cross sectional area of the stiffened ribbed plate in the direction of the upper pull rod pointing to the rear axle housing increases progressively. Specifically, the external profile of the stiffened ribbed plate in the expanded state comprises a top straight segment, a bottom straight segment and two smooth segments respectively connecting the sides of the above two segments. Such a design has many advantages: it can decrease weight of the upper pull rod supporter on the one hand. Because the sum of the own weight and the loading capacity of the mining dump truck is a constant value, the lighter upper pull rod supporter certainty decreases the own weight of the whole mining dump truck, which leads to increase its loading capacity. On the other hand, such a design can increase the welding area of the stiffened ribbed plate 22157 and the rear axle housing as much as possible to enhance the connection strength and reliability between the two. Moreover, it can decrease the stress concentration of the vertical plate by means of smooth curve segment connecting with the top circular arc segment and the bottom circular arc segment, which enhances its
113
2018233039 21 Sep 2018 impact resistance. It is worth mentioning that the whole upper pull rod supporter is made of welded assembling plates. The welding connection can decrease the weight of the upper pull rod supporter with controlled production cost comparing to the connection methods of thread connection or riveted joint. Because as for the mining dump truck, the sum of the own weight and the loading capacity of it is a constant value, this technical solution using welding connection can decrease the own weight of the upper pull rod supporter, which can certainly decrease the own weight of the mining dump truck and lead to increase its loading capacity.
[00254] The rear axle is also provided as shown in Fig. 15 and 16.The core improvements to the access cover lock catch are as follows: the access cover lock catch comprises a lock catch base 3, a pin shaft 22212, a screw lever 22213, a flange 22214 and a card plank 22215; wherein the lock catch base 22211 is used to be installed on the outer housing of an object to be overhauled; the pin shaft 22212 can be rotatably installed on the lock catch base 22211; the first end of the screw lever 22213 is connected with the pin shaft 22212, and the second end of the screw lever 22213 is connected with the flange 22214 by its internal screw thread screwing in; the card plank 22215 is used to be installed on the access opening cover of an object to be overhauled, and a card slot is provided in the card plank 22215, the notch size of the card slot is not less than the outer diameter of the screw lever 22213, which allows the screw lever 22213 enter into the inside of the card slot. The inner diameter of the card slot is less than the outer diameter of the flange 22214, which the flange 22214 can limit the card plank 22215 to lock the accessing opening cover. It can be known from the above technical solution that in the access cover lock catch according to this embodiment of the present invention when used, the screw lever 22213 is rotatably entered into the inside of the card slot of the card plank 22215, and then the flange 22214 is revolved toward the card plank 22215until tightly top it. The lock catch can be opened by means of being revolved the flank 7 to make the screw lever 22213 dextral around the pin shaft 22212. Because the screw lever 22213 is connected with the flange 22214 by screw, which has a function of autolock, it cannot be loosen during the operation of the vehicle, the access opening cover can be locked securely. The access cover lock catch in this
114
2018233039 21 Sep 2018 embodiment has advantages of securely locked, easy to operation and simple production. The structure of the access cover lock catch can be applied widely on an object to be overhauled with a rotary access opening cover for opening or closing. In order to further optimize the above technical solution, the screw lever 22213 can be connected detachably to the pin shaft 22212, so that it is simple to change the screw 6 and the flange 22214 when the screw of them occur abrasion. Specifically, the first end of the screw lever 22213 can be connected with the pin shaft 22212 by means of the structure of screw or the structure of inner hole matching with a pin shaft. The access cover lock catch according to this embodiment of the present invention further comprises an axial spring collar 22216. The pin shaft 22212 is axially fixed to the lock catch base 22211 by the axial spring collar 22216. The lock catch base 22211 is provided with two mounting bases having mounting holes. The both ends of the pin shaft 22212 are respectively installed into the two mounting holes. Preferably, the notch of the card slot of the card plank 22215is provided with a chamfered guiding surface structure in order to entering for the screw lever 22213. In the specific embodiment according to this embodiment, the lock catch base 22211 of the access cover lock catch is welded to the corresponding position of the rear axle housing 221, and the card plank 22215 is welded to the corresponding position of the access opening cover 2 of the rear axle housing 221, which the card slot of card plank 22215 is opposed to the screw lever 22213. Conclusively, the invention provides an access cover lock catch comprising: a lock catch base, a pin shaft, an axial spring collar, a screw lever, a flange and a card flank. The lock catch base is welded to the corresponding position of the rear axle housing. The card flank is welded to the corresponding position of the access opening cover. And then the screw lever is installed onto the lock catch base by the pin shaft and the axial spring collar. Finally the flange with internal screw is screwed into the screw lever. Wherein, the flange with internal screw is in a shape of circle, which makes the operation easy.
[00255] Please refer to Figures 12 and 13. Figure 12 is a schematic structural view of a rear axle housing assembled with a bumper member and provided in an embodiment of this utility model. Figure 13 is a schematic structural view of the rear axle housing
115
2018233039 21 Sep 2018 bumper member provided in the embodiment of this utility model.
[00256] The core improvement of the rear axle housing bumper member provided in the embodiments of this utility model lies in that the rear axle housing bumper member comprises:
[00257] a bumper bottom plate 2219 to be mounted at a corresponding position (mainly the bottom) of a rear axle housing body 2218, and a second sewage discharging hole 22191 provided in the bumper bottom plate 2219 at a position corresponding to a first sewage discharging hole 22181 in the rear axle housing body 2218; and [00258] a sewage discharging pipe 22192 for communicating the first sewage discharging hole 22191 with the second sewage discharging hole 22181 to ensure a normal sewage discharging function.
[00259] It can be seen from the above technical solution that after the rear axle housing bumper member provided in the embodiments of this utility model is assembled at a corresponding position of the rear axle housing body 2218, direct collisions between projecting objects on pavements of mines and the rear axle housing body can be effectively avoided or reduced, thereby protecting the rear axle housing body and extending its service life.
[00260] In order to fit a cylindrical structure of the rear axle housing body 2218, the bumper bottom plate 2219is designed as a non-flat structure, such as an arcuate shape fitting with an outer peripheral surface of the rear axle housing body 2218. Preferably, the side edges of the bumper bottom plate 2219,located at both side of its central axis, are bent upwards along a direction parallel with the above-mentioned centralax is, as shown in Figures 11 and 12. The bumper bottom plate 2219is provided in a bent structure, so it is simple in structure, convenient to manufacture and not liable to cracks in case of collisions. It shall be noted that the above-mentioned central axis of the bumper bottom plate 2219means a centerline of the bumper bottom plate, when at its installed state, corresponding to the central axis of the rear axle housing body 2218.The upper and lower (top surface and bottom surface) directions of the bumper bottom plate 2219 are also described relative to the installed state of the bumper bottom plate 2219, which is the same in the content below.
116
2018233039 21 Sep 2018 [00261] Specifically, the side edges of the bumper bottom plate 2219 can be bent repeatedly, each bending trace being parallel to the central axis of the bumper bottom plate 2219 so as to be close to the shape of an arc; and a bottom surface of the bumper bottom plate 2219 may be planar, and may be parallel to a horizontal plane in the installed state of the bumper bottom plate 2219.
[00262] The rear axle housing bumper member provided in an embodiment of this utility model further comprises a bumper rib plate 22193arranged on top of the bumper bottom plate 2219 in order to enhance the strength of the bumper member and extend the service life of the bumper member.
[00263] To further optimize the above technical solution, the top surface of the bumper rib plate 22193 is a circular surface for fitting with the rear axle housing body 2218, as shown in Figure 13. The bottom surface of the bumper rib plate 22193 may be a bending surface corresponding to the bending structure of the bumper bottom plate 2219.
[00264] In a particular embodiment of the present solution, the bumper rib plate 22193 is arranged to be perpendicular to the central axis of the bumper bottom plate 2219 to better support the bending or arcuate structure of the bumper bottom plate 2219.
[00265] Preferably, there is a plurality of bumper rib plates 22193 arranged with intervals along a direction of the central axis of the bumper bottom plate 2219 to enhance the strength of the whole bumper member.
[00266] Further, the plurality of bumper rib plates22193is arranged with equal spacing along the direction of the central axis of the bumper bottom plate 2219, and is uniformly distributed among three sewage discharging pipes 22192.
[00267] The embodiment of this utility model further provides a rear axle comprising a rear axle housing body 2218. The core improvement of the rear axle is that the rear axle comprises the above-mentioned rear axle housing bumper member arranged on the rear axle housing body 2218. The rear axle housing bumper member has a simple structure and obvious anti-collision effects.
[00268] In a particular embodiment of the present programs, the bumper rib plate 22193 is welded to the bumper bottom plate 2219 which is welded to the rear axle housing body 2218, and two ends of the sewage discharging pipe 22192 are welded to the first
117
2018233039 21 Sep 2018 and the second sewage discharging holes respectively. Of course, fixed connection may be achieved by using bolts or other removable manners. In this way, replacement is simple when the bumper member is damaged.
[00269] The embodiment of this utility model further provides a mining dump truck comprising a rear axle. The core improvement of the mining dump truck is that the rear axle is the above-mentioned rear axle, which is simple in structure, can greatly improve the anti-collision capacity of the rear axle housing during driving and extend the service life of the rear axle housing.
[00270] In conclusion, the embodiments of this utility model disclose a rear axle housing bumper member of a mining dump truck, the rear axle housing bumper member comprising a rear axle housing body, a bumper bottom plate, a bumper rib plate and a sewage discharging pipe. First of all, the bumper bottom plate is bent into a desired shape. Next, the bumper rib plate is welded to a corresponding position on the bumper bottom plate. Then, the bumper bottom plate is welded to a corresponding position of the rear axle housing body. At last, two ends of the sewage discharging pipe are respectively connected to the sewage discharging holes in the rear axle housing body and in the bumper bottom plate. The bumper bottom plate is provided in a bent structure, so it is simple in structure, convenient to manufacture and not liable to cracks in case of collisions. It shall be noted that the above-mentioned central axis of the bumper bottom plate 2219 means a centerline of the bumper bottom plate, when at its installed state, corresponding to the central axis of the rear axle housing body 2218. Direct collisions between projecting objects on pavements of mines and the rear axle housing body can be effectively avoided or reduced by the rear axle housing bumper member, thereby protecting the rear axle housing body and extending its service life. Moreover, this utility model also provides a rear axle and a mining dump truck respectively applying the above-mentioned rear axle bumper member. The beneficial effects of the rear axle housing bumper member lie in that it is simple in structure, can greatly improve the anti-collision capacity of the rear axle housing during driving and can extend the service life of the rear axle housing.
[00271] It is worth mentioning that, a rear axle casing is additionally provide between
118
2018233039 21 Sep 2018 the electrical wheel pairs 223 of the rear axle according to the present invention, where in the electrical wheel pairs 223 connect with the main frame through the rear axle casing, and the rear axle casing 2241 connect with back end of the main frame 11 through a first connection member 2242 and a second connection member 2243, wherein two lateral ridges of the main frame 11 are provided with pairs of connection lugs 1111 respectively, the rear axle casing connects with the two lateral ridges 111 respectively through the connection lug pairs, and wherein each pair of connection lugs are welded as a whole with a traverse beam between them. Additionally, a rear axle housing is provided outside the rear axle casing, wherein one ball end of the first connection portion hinges the upper portion of the rear axle housing, and the other ball end hinges the main frame. The second connection portion comprise two connection rods, wherein one ball end of the connection rod hinges the rear axle housing, and the other hinges the connection lug of the vehicle frame. As a preferable embodiment, parts of the electrical wheel pairs are arranged inside the rear axle casing 2241.
[00272] It worth mention that the braking devices and the electrical driving devices of the dump truck are configured as a whole, wherein the electrical driving devices composes of pairs of electrical wheels, and the braking devices are composed of wet brake pairs, as shown in Fig. 17, wherein:
[00273] According to one embodiment of the present invention shown in fig. 17 to 19, the Electrical wheels 223 are arranged at left and right sides of the rear wheels 225, and the left and the right rear wheels 225 are driven separately. Motor 2231 arranged in the electrical wheel 223, and is arranged by insert from the inner side of the rear wheel 225 along the width direction of the vehicle body, wherein motor 2231 is a electromotor, and receives power supply generated by diesel engine arranged on the dump truck to rotate. [00274] As shown in Fig. 17, the electrical wheel 223 for motor vehicles comprise: a motor 2231, which is placed at one axial end of the main shaft 2232 and fixed relative to the vehicle body, a rotating shaft 2234, which combines with output shaft 22321 of the motor 2231 but is not relatively rotatable to each other, and which inserts through internal side of the main shaft 2232 and protrudes from the other axial end of the main shaft 2232, a reducer 2235, which is placed at the other end of the main shaft 2232 and
119
2018233039 21 Sep 2018 clamped between the rotating shaft 2234 and the vehicle wheel 225, and which transfers power from the rotating shaft 2234 to the vehicle wheel, and a hub 2251, which connects with the reducer 2235 and is integrally formed and rotatablely arranged at outer surface of the main shaft 2232 by a bearing.
[00275] In one embodiment of the present invention, the rotating shaft 2234 is integrally formed and comprises a first rotating shaft 22341 and a second rotating shaft 22342, which are of different external diameter and concentrically arranged, for solving the problem of easily broken of the rotating shaft during transmission of higher torque and thus with shorter service life. Further, for higher power output supplying, the first rotating shaft 22341 reaches and links with the coupling 2233, and the second rotating shaft 22342 extends along the axis of the main shaft 2232 away from the coupling 2233, wherein the external diameter of the second rotating shaft 22342 is larger than that of the first rotating shaft 22341. Preferably, the outer surface of the second rotating shaft 22342 is evenly arranged with tooth in order to transmit the torque from the output shaft 22321 of the motor 2231 to the rotating shaft 2234 by the integrally fixed coupling 2233, and further transmit it by the tooth on the outer surface of the second rotating shaft 22342 so as to achieve that the driving rotational motion outside the reducer 2235 is transmitted into the reducer 2235 for driving after slowdown and torque rise.
[00276] In order to guarantee smoothness of transmission between the rotating shafts, reduce or offset the shear stress in the length direction, and improve the deviation compensation ability in the radial directions, axial directions, angle directions and other of the rotating shafts, the coupling 2233 is arranged around the junction of the output shaft 22321 of the motor 2231 and the rotating shaft 2234, wherein the coupling 2233 is sleeved on the end of the output shaft 22321 and fixed on internal side of the main shaft 2232, and extends along the axis of the rotating shaft 2234. Preferably, the coupling 2233 is a gear coupling for facilitating coaxial connection between the output shaft 22321 and the rotating shaft 2234, improving the ability of torque transmission and prolonging its service life.
[00277] The reducer 2235 comprise a first planet gear mechanism 22351 and a second planet gear mechanism 22352, which are disposed along the main shaft 2232 from the
120
2018233039 21 Sep 2018 first planet gear mechanism 22351 to the second planet gear mechanism 22352 in a radial direction away from the main shaft 2232, wherein the first planet gear mechanism
22351 meshes with the rotating shaft 2234. Specifically, the first planet gear mechanism
22351 is arranged around and meshes with the second rotating shaft 22342.
[00278] In order to increase the bearing strength of the whole reducer, improve its load sharing ability, and facilitate disassembling and overhaul, it is structurally preferred that the first planet gear mechanism 22351 and the second planet gear mechanism 22352 are arranged on the main shaft in an axial direction away from the motor 2231 and in order from the first planet gear mechanism 22351 to the second planet gear mechanism 22352. [00279] The first planet gear mechanism 22351 comprises: a first sun gear 223511, first planet gears 223512, which meshes with the first sun gear 223511, a first planet carrier 223514, which supports the first planet gear 223512 rotatablely by a bearing 223513, and a first ring gear 223515, which meshes with the first planet gear 223512.
[00280] The first planet carrier 223514 comprises studs 2235141, a connecting plate 2235142, a raised face 2235143, wherein the connecting plate 2235144 and the raised face 2235143 are fastened together with several studs 2235141, the raised face 2235143 is placed on the side away from that opposite to the fixing side of the connecting plate 2235142, and wherein the outboard end of the main shaft 2232 extends out to be a protrusion. Preferably, the raised end extending from the raised face 2235143 is provided with internal splines, and preferably, the raised end of the raised face 2235143 close to the main shaft 2232 is provided with internal splines.
[00281] The first ring gear 223515 comprises a first class ring gear 2235151, a second class ring gear 2235152, a fixed gear plate 2235153 for supporting the first class ring gear 2235151 and the second class ring gear 2235152, and a bolt 2235154 for fixed connection of the first class ring gear 2235151 and the fixed gear plate 2235153, wherein the first class ring gear 2235151 and the second class ring gear 2235152 are connected coaxially into a whole, one end of the fixed gear plate 2235153 fixed on the internal side of the main shaft 2232 is not rotatable, and the other end is fixed on the first class ring gear 2235151 into a whole with the bolt 2235154. The main shaft 2232 is fixed to the wheel 225 and relatively rotatable, which means that the first ring gear
121
2018233039 21 Sep 2018
223515 is rotatablely fixed relative to the vehicle wheel 225.
[00282] The first ring gear 223515 further comprises sleeves 2235155 and flange bolts 2235156 for secure fixing of the first ring gear 223515 with the main shaft 2232, wherein several flange bolts 2235156 run through the first ring gear 223515 and are fixed on the internal side of the main shaft 2232. Specifically, the sleeves 2235155 lean against the fixed end of the fixed gear plate 2235153, and several flange bolts 2235156 are used to clamp the sleeves 2235155 for tightly connection with the main shaft 2232, the lager end face of the fixed gear plate 2235153 meshes with the first class ring gear 2235151 with a spline gear, and the bolt 2235154 restricts the axial displacement between the fixed gear plate 2235153 and the first class ring gear 2235151, so that the fixed gear plate 2235153 and the first class ring gear 2235151 are securely connected and fastened into a whole.
[00283] Further, in order to securely fasten the first class ring gear 2235151 and the main shaft 2232 into a whole, the fixed gear plate 2235153 comprises a lager end face and a smaller end face whose internal diameters are different, wherein the smaller end face of the fixed gear plate 2235153 is fastened to the side end face of the main shaft 2232 by the flange bolt 2235156, and the bolt 2235154 runs through the lager end face of the fixed gear plate 2235153 and fastens with the first class ring gear 2235151 into a whole, so that the fixed gear plate 2235153 is fastened to the main shaft 2232 by the bolt 2235154 and the flange bolt 2235156. At this point, the main shaft 2232, the fixed gear plate 2235153 and the ring gear 223515 are reliably connected and fastened into a whole.
[00284] Preferably, there are three first planet gears 223512, which evenly surround and mesh with the sun gear 223511. In addition, the first ring gear 223515 can be formed integrally so as to achieve better mechanical properties.
[00285] The second planet gear mechanism 22352 comprises: a second sun gear 223521, second planet gears 223522 meshing with the second sun gear 223521, a second planet gear carrier 223524 meshing with the second planet gear 223522with a bearing 223523, and a second planet carrier 223525 fastened with the second planet gear carrier 223524, wherein the second planet gear 223522 is clamped between the second sun gear
122
2018233039 21 Sep 2018
223521 and the first ring gear 223515, specifically, the second planet gears 223522 are evenly placed inside the second class ring gear 2235152, and meshes it with gear, and the second sun gear 223521 and the second planet gears 223522are placed along the main shaft 2232 in radial direction away from the main shaft 2232in turn; the second planet carrier 223525 is fastened on the side end surface of the second sun gear 223521that is away from the main shaft 2232 in the axial direction of the main shaft 2232 away from the motor 2231, the second planet gear carrier 223524 are fastened to the bearing 223523, the second planet gears 223522 and the second planet carrier 223525 by several studs 2235241 running through it, and the second planet gear carrier 223524 is connected to the hub 2251 by bolt. Preferably, the second sun gear 223521 is rotatablely fastened along extension direction of the rotating shaft 2234. Further, the second planet gears 223522are coaxially and rotatablely fastened to the second sun gear 223521.
[00286] Preferably, there are four second planet gears 223522, which evenly surround the second sun gear 223521, and while their internal surfaces mesh with and revolve around the second sun gear 223521 by bearing 223523, their exterior surfaces processed with tooth also rotate and mesh with the second class ring gear 2235152.
[00287] The second sun gear 223521 has an outline of ladder-shaped cylinder, and comprises a cylinder portion 2235221 and cylinder-shaped protrusion portion 2235222, wherein shaft shoulder of the cylinder-shaped protrusion portion 2235222 positions the second sun gear 223521 and meshes with internal spline of the second planet gear carrier 223524. Preferably, the cylinder portion 2235221 and the cylinder-shaped protrusion portion 2235222 are coaxially arranged to avert shearing stress generating during transmission of the torque.
[00288] To facilitate injection of lubricant, it is preferred that the second planet gear mechanism2252 also comprise a thrust end cover 2235252, which fasten with the second planet carrier 223525 by several bolt. Further, the thrust end cover 2235252 is provided with a cavity inside for storing coolant oil.
[00289] In order to protect from the axial thermal expansion of the rotating shaft 2234, it is preferred that a copper thrust washer2235253is provided between the second sun
123
2018233039 21 Sep 2018 gear 223521 and the thrust end cover 2235252, which can axially move between the second sun gear 223521 and the thrust end cover 2235252.So that the obstacle to rotation of the thrust end cover result from expansion of the rotating shaft along its axis during transmission of high torque can be avoid by the movable copper thrust washer
2235253.
[00290] The reducer configured in this way works as follows.
[00291] The coupling 2233connects the output shaft 22321 of the driving motor with the rotating shaft 2234 by spline, wherein the torque output from output shaft 22321 of the driving motor is transmitted to the first planet gear mechanism 22351 after slowdown and torque rise, and the rotation is transmitted to the first planet gear 223512 by the first sun gear 223511 gear inside meshing with it. Since the first ring gear 223515 and the main shaft 2232 are fasten together, while the first planet gear 223512 revolves around the first sun gear 223511, it also rotates around the first ring gear 223515, so as to drive the first planet carrier 223514 fastened together rotating relative to the main shaft 2232. So that rotation of the first sun gear 223511 is transmitted to the first planet carrier 223514, then transmitted to the second sun gear 223521 through the raised face 2235143of the first planet carrier 223514, and finally the second sun gear 223521 rotates.
[00292] Thus, when the second sun gear 223521 rotates, the second sun gear 223521 drives the second planet gears 223522 rotating in the second planet gear mechanism 2252. While second planet gears 223522 rotate around their own axis, they also revolve around the second class ring gear 2235152, e.g. revolve around the first ring gear 223515, so as to drive the second planet gear carrier 223524rotating.Because the second planet gear carrier 223524is fastened together with the hub 2251, it rotates with the vehicle wheel 225arranged outside the hub 2251.
[00293] So that, after slowdown and torque raise in the first planet gear mechanism 2235land the second planet gear mechanism 22352, the torque is transmitted to the vehicle wheel 225, thus wheels of the dump truck can be drove to move.
[00294] In the electrical driving devices of the present Embodiment, it is preferred that the main shaft 2232consists of motor insert portion and rotating shaft insert portion
124
2018233039 21 Sep 2018
22321, wherein the motor insert portion is hollow and roughly frustum-shaped tapering from the front of the car to the reducer 2235, and the motor 2231 inserts from the side of the output shaft 22321, the rotating shaft insert portion 100a is roughly cylinder-shaped extending from the front of the motor insert portion to the reducer 2235, and positioned in the way of cutting in by the rotating shaft 2234.
[00295] In one embodiment of the present invention, the hub 2251 can be any suitable devices, as long as it can transmit torque from the motor 2231 to the vehicle wheel 225 after slowdown and rise by the reducer 2235. For example, the hub 2251 is a sleeve sheathing the main shaft 2232 and clamped between the reducer 2235 and the motor
2231, one end of which close to the motor 2231 is rotatablely fastened on outer surface of the main shaft 2232 by a bearing, and the other end away from the motor 2231 is provided with a cavity inside for holding the reducer 2235 and fastened with the reducer 2235 into a whole. Further, the hub 2251 is integrally formed for larger torque transmission, optimizing the stress on it and prolonging its service life. Specifically, the hub 2251 includes a hub outer ring 22511 and a hub connector 22512, wherein the hub outer ring 22511 is rotatablely fastened on outer surface of the main shaft 2232, the end that away from the motor 2231 is fixed on the reducer 2235 into a whole with bolts, the hub connector 22512 is clamped between the hub outer ring 22511 and the main shaft 2232 and fastened to the hub outer ring 22511 into a whole with bolts. More specifically, the thrust end cover 2235252 is fastened to the hub outer ring 22511 into a whole with bolts, and while driven by the second planet gear carrier 223524, rotates the hub connector 22512 together relative to the main shaft 2232, so that the rotational motion of the motor 2231 is transformed into rotation of the hub 2251 relative to the main shaft
2232.
[00296] The electrical wheel also includes a cooling member 226 providing lubricant to the main shaft 2232 and the reducer 2235, so that the reducer 2235 can be cooled well by the lubricant and reducing the heat generated during transmission. The cooling member 226 comprises a suction pipe 2261 mounted on the main shaft 2232 for spraying lubricant into the reducer 2235, a return pipe 2262 for recycling the lubricant, a first cavity 2263 and a second cavity 2264which are bounded by the first ring gear
125
2018233039 21 Sep 2018
2235153, the fixed gear plate 2235153and the second planet carrier 223525 and communicated with each other, and a third cavity 2265 bounded by the main shaft 2232, hub 2251 and the brake, wherein the suction pipe 2261 is communicated with the first cavity 2263, the return pipe 2262 is communicated with the third cavity 2265, the second cavity 2264 and the third cavity 2265 are communicated with the first cavity 2263, so that the lubricant can be easily injected into the reducer 2235 lubricating and cooling the meshing gears inside the reducer 2235.
[00297] The cooling member 226 further comprises a hydraulic pump 2266 providing pressure to the lubricant so as to realize automatic cycling of the cooling circuit, wherein the lubricant pressurized by the hydraulic pump 2266 is communicated with the suction pipe 2261.
[00298] The lubricant enters into the first cavity 2263 through the suction pipe 2261 with the spraying effect of the rotating gear, the lubricant is brought in to the second cavity 2264, thus directly and effectively cools off the copper thrust washer 2235253. While the first cavity 2263, the second cavity 2264 and third cavity 2265 communicate with each other, after effectively cooling off the gears, bearings and other components in each cavity, the lubricant passes by several meshing gear groups and recycles into the third cavity 2265 under pressure of the hydraulic pump 2266, and then it is drawn off through the return pipe 2262, so that a cooling circuit is formed.
[00299] The cooling member 226 further comprises a sensor 2267 arranged insider the reducer 2235 monitoring temperature of the reducer 2235, so as to be informed with the temperature inside the reducer 2235 of the electrical wheel in a real-time, wherein the sensor 2267 communicates with the control system controlling the cooling circuit of the whole truck.
[00300] Additionally, the electrical wheel further comprises a brake 227 mounted between the main shaft 2232 and the hub 2251 for braking of the vehicle wheel 225, wherein one end of the brake 227 is fastened on the main shaft 2232 as standing end, the other end is fastened to the hub 2251 with a bolt as a whole and rotating with the hub 2251 .Thus, through braking the rotating part with brake, controlling on rotating speed of the hub 2251 can be realized, so as to restrict the speed of the whole vehicle. Further, for
126
2018233039 21 Sep 2018 effectively and accurately braking, the brake 227 is a wet brake. Specifically, the brake 227 comprises a brake fixed base 2271, a piston 2273 and a friction plate 2272 clamped between the brake fixed base 2271 and the piston 2273, wherein the brake fixed base 2271 is fastened to the hub 2251 into a whole with bolts, and the piston 2273 and the main shaft 2232 are fixed movably relative to each other along axial direction of the main shaft 2232. Preferably, the friction plate 2272 comprises at least one movable friction plate 22721 and at least one fixed friction plate 22722 alternatively placed in turn, wherein the radial sides of the movable friction plate 22721 and the fixed friction plate 22722 are arranged with frictional particles having high friction factor, and the movable friction plate 22721 and the fixed friction plate 22722 are placed with gap between each other and rotatable relative to each other. Further, the movable friction plate 22721 and the brake fixed base 2271 are fastened together, and the fixed friction plate 22722 and the piston 2273 are fastened together, so that the alternatively placed movable friction plate 22721 and fixed friction plate 22722 are fixed with adjustable displacement driven by the piston 2273. In the case of braking, the piston 2273 is driven to move, distance between the movable friction plate 22721 and the fixed friction plate 22722 diminishes, and the friction resistance between them increases, so that the relative rotating resistance between the movable friction plate 22721 and the fixed friction plate 22722 increases, and the revolving resistance of the hub 2251,which fastened to the movable friction plate 22721 as a whole with the hub connector 22512, relative to the main shaft 2232 aggravates. Thus rotating speed of the hub 2251 can be realized.
[00301] In addition, the electrical wheel also comprises a bridge base 80 clamped between the motor 2231 and the main shaft 2232 and connected with them for stable connection thereof. Further, there are four bridge bases 2236evenly placed along the circumferential direction of the output shaft 22321 of the motor 2231 to avoid uneven force. Preferably, the bridge base 2236 and the main shaft 2232 are integrally formed.
[00302] In one embodiment of the present invention, the electrical wheel further comprises a rim 2252 connected between the vehicle wheel 225 and hub 2251 to increase the vehicle load, wherein the rim 2252 sheathes the hub 2251 and fastens to it into a whole. The load and own weight of the whole vehicle are evenly distributed to the
127
2018233039 21 Sep 2018 vehicle wheel 225. Specifically, the rim 2252comprises a outer rim 22521 and an inner rim 22522 which fit and fasten to the vehicle wheel 225, and a rim intermediate ring 22523clamped between the outer rim 22521 and the inner rim 22522, wherein the inner rim 22522, the rim intermediate ring 22523 and the outer rim 22521 are placed along axis of the main shaft 2232 away from the motor 2231 and successively connect and lean against each other. The rim 2252 further comprises a wedge 22524 fastened to the main shaft 2232 into a whole for better binding of the rim 2252 and the hub 2251, wherein the wedge 22524 is clamped between the rim 2252and the hub 2251 and extends along axis of the main shaft 2232 towards the motor 2231 with thickness decreasing. With the wedge 22524 having taper thickness, while fixing the wedge 22524with the main shaft 2232, the wedge 22524 can be squeezed into the clearance between the rim 2252 and the hub 2251 and further fasten the rim 2252 on the hub 2251, thus can guarantee the integrally retaining of the hub and the rim and effectively avoid loosening that easily happen during running.
[00303] The cab assembly 3 comprises a platform assembly 31, a cab 32 and control center as well as a multi-stage ladder. The cab assembly in this embodiment is subject to current safety and stability standards, with reference to operational principles and basic structures in prior art. Following detailed description is made with respect to the improvement of the mining dump truck according to the present invention over the prior art, otherwise no more details. The cab and the control center are all provided on the platform assembly, and the ladder comprises a flexible ladder for a driver to step on and off the cab and a service ladder for a service staff to check and repair the mining dump truck.
[00304] Shown in fig 33, the cab comprises a cab frame, a skin cover provided thereon and a cab bottom plate. In addition, a cab operation console and a control station are provided, wherein the operation console is located between the cab and the seat, and the control station is located above the driver’s head.
[00305] The cab frame comprises a top frame 3211, a bottom frame 3212 and front beams 3213 on both sides in front of the cab as well as rear beams 3214on both sides behind the cab, wherein the front beams 3213 and rear beams 3214 are connected to the
128
2018233039 21 Sep 2018 top frame and the bottom frame, respectively. An operation table frame 3215 can be arranged in front of the cab frame, i.e. operation devices like steering wheel and central control system in the cab can be mounted on the operation table frame 3215. The top frame comprises a horizontal frame 32111 and an inclined frame 32112 connected thereto, wherein the horizontal frame 32111 comprises two top longitudinal beams 321111 and two top transverse beams 321112, and the bottom frame particularly comprises four bottom longitudinal beams 32121 and two bottom transverse beams 32122. The top and bottom frames form an enclosed frame respectively. Abasic profile of the cab frame is enclosed by the front beams 3213 on both sides in front of the cab 3213 and the rear beams 3214 on both side behind the cab as well as the top and bottom frames, wherein a space between two front beams 3213 corresponds to the front end face of the cab, and thus the front windshield is located between two front beams 3213, and a space between two rear beams 3214 corresponds to the rear end face of the cab. The cab frame is provided at its both sides with a front support beam 3216 and a rear support beam 3217 located between the top and bottom frames, wherein the front support beam 3216 is adjacent to the front beam 3213 and the rear support beam 3217 is adjacent to the rear beam 3214, so that the strength and vertical loading capability of the cab frame are enhanced. The cab door is located between the front support beam 3216 and the rear support beam 3217, and an inclined front support beam 3218 is provided between the front support beam 3216 and the front beam 3213, while an inclined rear support beam 3219 is provided between the rear support beam 3217 and the rear beam 3214. The positions of the inclined front support beam 3218and the inclined rear support beam 3219 keep consistent so as to guarantee loading balance. The inclined front support beam 3218 and the inclined rear support beam 3219 are located beneath the cab frame, so that enough space in front of the cab can be remained for placing the front windshield so as to secure wide visual field. The inclined support beams are provided for enhancing vertical and horizontal loading capability and bending resistance of the support beams,
i.e. the inclined support beams and the front beam 3213 (or rear beam 3214) as well as the bottom frame, resulting in an triangular support structure. Obviously, the provision of the support beam and inclined support beam, particularly the provision of the inclined
129
2018233039 21 Sep 2018 support beam, enhances the strength of the cab frame in this embodiment and thus substantially the stability thereof, so as to prevent deformation and improve driving safety when the mining dump truck is subject to roll over, turn over or falling objects. Furthermore, such configuration is not interfered with the arrangement of the door. The operation table frame 3215 is located between the front beam 3213 and the front support beam 3216 and adjacent to downside of the cab, so that devices mounted thereto can be operated easily by the driver. In this case, one end of the inclined front support beam 3218 can be located at the connection between the front beam 3213 and the bottom frame, the other end is located between the connection between the operation table frame 3215 and the front support beam 3216. Such configuration of the support beams can improve the strength of respective connections and stability of the frame. As a preferable solution, the cross section area of the operation table frame 3215 or the front beam 3213 can be less than that of other beams of the cab frame. In other words, a profile section with a smaller cross section can be used for the operation table frame 3215 and the front beam 3213, while a profile section with a larger cross section can be used for the support beam, the inclined support beam, the rear beam 3214 and the bottom and top frames. The operation table frame 3215 and the front beam 3213 correspond to the operation area and major visible area of the cab which belong to non-safety protection area in which a profile section with a smaller cross section can be adopted for providing a wider visual area, and otherwise a profile section with a larger cross section can be adopted for guarantee the strength of the cab frame. Further, a slope is provided in the front of the cab, so that the front beam 3213 can include the front inclined beam and the front vertical beam connected thereto. A second front transverse beam can be provided, both ends of which are connected to the connection between the front inclined beam and front vertical beam on both sides to enhance the stability of the front frame. In fact, based on the visual need in front of the cab and the position of the non-safety protection area (based on the arrangement of the operation table and required safety class lower than in other portions), the top ends of the front beams 3213 on both sides can be connected to the top longitudinal beam 321111 of the top frame by means of two short longitudinal beam 303, and a first front transverse beam is provided between
130
2018233039 21 Sep 2018 the top ends of the front beams 3213 on both sides, so that a portion of the cab frame corresponding to the operation table frame 3215 can be designed with a lower strength. In this case, the operation table frame 3215 can be provided at a position at which the front inclined beam 3213 is connected to the front vertical beam 3213, so as to effect reasonable spatial arrangement and reliable connection of respective beams. It can be appreciated that the inclined front support beam3218 in this embodiment is inclined upward from front to rear side. In fact, the inclined front support beam3218 can be inclined downward from front to rear side. For example, the inclined front support beam3218 is connected at its one end to the connection between the operation table frame3215 and the front beam 3213, and at the other end to the connection between the front support beam3216 and the bottom frame. As mentioned above, the non-safety protection area is located in front of the cab, while the inclined front support beam 3218 is inclined downward from front to rear side to facilitate the structural stability of the front end face, and so the inclined front support beam 3218 is inclined upward from front to rear side to facilitate the structural stability behind the front support beam 3216 so as to achieve the required safety class. It can be conceived that although inclined support beams which can be inclined in two directions are provided simultaneously, an inclined support beam which is only inclined in one direction can achieve certain required customary stability and controlled cost. In addition, the inclined rear support beam 3219 at one end is located at the connection between the rear support beam 3217 and the bottom frame, in a similar principle to that for the above-mentioned inclined front support beam 3218, by means of which the strength of the connection can be enhanced. Accordingly, the inclined rear support beam 3219 at the other end is located on the lower end of the rear beam 3214. In addition, a horizontal frame can be provided on the top inclined support beam, two ends of which are connected to two upper diagonal comers of the horizontal frame. The top inclined support beam and the inclined front support beam3218 as well as the inclined rear support beam 3219 have the same configuration effect, i.e. to effect stable supporting and guarantee frame strength. In addition, the top inclined support beam provided on the top frame can effectively avoid damage due to tum-over and falling objects. The top frame comprises a horizontal frame
131
2018233039 21 Sep 2018 and an inclined frame connected thereto which is located behind the cab frame. The longitudinal frame in the shown top frame comprises a top longitudinal frame 32111 and a top inclined longitudinal beam 32112. The cab rear end has an inclined slope, so that the space between the cab and the compartment is enlarged. The interference of the cab with the compartment roof can be avoided by designing the cab rear end with a slope, so as to prevent damage to the cab due to loaded cargo. The cab frame can be provided at both sides with enforcement beams, which at its one end is connected to the rear support frame 3217 and at its other end is located at the connection between the inclined frame and the rear beam 3214. As shown in Fig.33, the enforcement beam is arranged horizontally, and because the inclined frame forms a top inclined longitudinal beam, the rear support beam 3217, the enforcement beam and the inclined beam of the inclined frame form a substantially triangular structure to resist effectively the vertical force, perpendicular force and bending for providing stability of the rear upper end of the cab, while its rear lower end is supported stably by the inclined rear support beam3219, the rear support beam 3217 and the rear beam 3214, so that high stability behind the whole cab can be obtained.
[00306] Shown in fig. 34 and 35, the cab bottom plate comprises an upper bottom plate 3221 and a lower bottom plate 3222 which are arranged in sequence from top to toe, i.e. the upper bottom plate 3221 is more adjacent to the driver. A foam layer 3226 is produced by means of a foaming process between the lower bottom plate 3222 and the upper bottom plate 3221, and separation plates 3225 can be provided between the lower bottom plate 3222 and the upper bottom plate 3221, between two of which separation plates wiring grooves 3224 for receiving wires or cables and in particular the wires or cables for the cab bottom plate are formed. As shown in Figs.34and 35, the lower bottom plate 3222 is welded to the cab basic frame and the cab cover skin, while the upper bottom plate 3221 is welded to the cab cover skin and the front and rear cab frames, with the separation plates 3225 welded to the lower bottom plate 3222 and the upper bottom plate 3221. After be welded, the lower bottom plate 3222, the upper bottom plate 3221, the cab cover skin and the separation plates 3225 form a closed foaming space. In this case, foaming agents can be introduced into this space for foaming and producing the
132
2018233039 21 Sep 2018 required foam layer. The welding fixation is reliable and stable for ensuring that the foaming agents would not enter into the wiring grooves 3224 between two separation plates 3225. In this case, openings 3227 can be provided at the locations of the lower bottom plate 3222 corresponding to the wiring grooves 3224, which openings correspond to the central control system in the cab. After the openings 3227 are provided at these locations, wires or cables within the wiring grooves 3224 can be directly connected to the central control system there-above for facilitating wire connection. The wiring grooves 3224 function on one hand to protect wires or cables from being damaged from outside, and on the other hand can effect orderly arrangement of wires or cables so as to avoid tangle, misconnection, etc. due to disorder. In addition, the interior of the cab looks more tidy and beautiful when the wires or cables are hid within the wiring grooves 3224. A few support posts 3223can be provided between the lower bottom plate 3222 and the upper bottom plate 3221 for connecting said two bottom plates with each other to ensure the stability of the cab bottom plate as a whole and also to avoid generating noises caused by the deformation of the upper bottom plate 3221 when an operator moves in the cab. A set of support posts 3223are provided directly adjacent to the outside of the separation plates 3225, i.e. three support posts 3223are provided at the outside of two separation plates respectively. The foam layer is a plastic layer with a micro-porous structure possessing a great capability of absorbing heat and sound so as to achieve a great effect of heat isolation and noise reduction. The foam layer connects firmly the upper bottom plate 3221 with the lower bottom plate 3222, so that the whole bottom plate has a more stable structure and increased strength. The foam layer has a better damping performance to enhance the comfort sense for a walking driver.
[00307] Shown in fig. 36, the cab operation console is used for arranging in collection the related control devices in the dump truck so as to avoid misoperation of similar control devices and improve operational simplicity, convenience, accuracy and comfort. The cab operation console is provided at its front end with an inclined surface which is in connection with the top planar surface of the cab operation console, wherein a vertical plane in which the connection edge there between is located separates the cab operation
133
2018233039 21 Sep 2018 console into an inclined operational area 3312 and a main operational area 3311.That is, the vertical area of the cab operation console in which the inclined surface is located is the inclined operational area 3312, whereas the vertical area of the cab operation console in which the connected top planar surface is located is the main operational area 3311. The inclined operational area 3312 and the main operational area 3311 are provided for receiving related groups of control devices respectively. The main operational area can avoid the operator’s frequent operation actions such as turning-around and bending over caused by distributing arrangement of the operation devices, so as to reduce the operational difficulty and enhance operational efficiency. The cab operation console can be in form of a rectangular platform having a longitudinal direction along the front to rear direction of the mining dump truck between the driver seat and the passenger seat, comprising the inclined operational area 3312 located on the front end of the top surface of the rectangular platform (the vertical area of the cab operation console in which the inclined surface is located, i.e. formed by cutting of one upper edge of the rectangular platform), the main operational area 3311 (i.e. the vertical area of the cab operation console in which the top surface connected to the inclined operational area 3312), an auxiliary operation area 3313 connected to the rear end of the main operational area 3311 and storage area 3314 connected to the rear end of the auxiliary operation area 3313. The rectangular platform is a convenient structure which can be produced easily with lower cost. The main operational area 3311 is provided at its top planar surface with a mounting opening 33311 for a steering lever, a mounting opening 33112 for a load braking button and a mounting opening 33113 for lifting operation lever at a side adjacent to the driver seat side, for mounting the steering lever, the load braking button and lifting operation lever respectively, when the mining dump truck carries out the lifting operation. In this way, three control devices which are strongly associated with frequent operations of lifting and dumping are collectively mounted in the main operational area 3311 of the cab operation console so as to carry out the lifting and dumping operations more precisely and efficiently. At the handle of the lifting operation lever is provided a self-lock control button, depending on pressing of which or not, it can be determined whether pulling the lifting operation lever functions or not. A
134
2018233039 21 Sep 2018 mounting opening for an emergency stop button 33121, a power interface 33122 and a mounting opening for window rising button are provided on the inclined surface of the inclined operational area 3312 for mounting the emergency stop button, the power and the window rising button. The positions for the mounting opening 33121 for an emergency stop button, the power interface 33122 and the mounting opening for window rising button are configured so as to enhance their operational simplicity and convenience more effectively. Particularly, as shown, the mounting opening 33121 for an emergency stop button, the power interface 33122 and the mounting opening for window rising button as shown are arranged in sequence from a lower inclined end to an upper inclined end of the inclined surface. In addition, the inclined surface of the inclined operational area3312 has an included angle in the range of 30° to 45° with respect to the horizontal surface so as to effect the function of the inclined operational area 3312. In addition, the main operational area3311 at one side is provided in sequence with the auxiliary operation area 3313 and the storage area 3314 as shown. In this case, the cab operation console has in sequence the inclined operational area, the main operational area, the auxiliary operation area and the storage area, wherein the planar surface of the auxiliary operation area 3313 is provided with a mounting opening 33131 for a mirror heating button and a small storage box 33132 for operator to place articles conveniently so as to expand the function of the cab operation console and provide mounting positions for non-frequently used buttons, so that disturbance to important frequently used control devices is effectively avoided. The storage area 3314 is of a box-shaped structure and at its top planar surface provided with a box cover 33141, by means of which the box can be opened and closed, so that various articles e.g. service tools can be placed in order, resulting in full use of the space at the rear end of the cab.
[00308] Shown in fig. 37, the cab control station is used for placing devices in the mining dump truck cab, comprising a control box 3321 which at its top portion is attached to the top portion of the cab front end, i.e. above the driver on the front side. The control box3321 has a bottom plate 33211 parallel to the top plate of the cab and is converged from a side adjacent to the front cab windshield to a side adjacent to the driver. That is, said bottom plate 33211 has a smaller transverse size at the side adjacent
135
2018233039 21 Sep 2018 to the drive and a larger transverse size at the side adjacent to the front cab windshield. In this way, it is possible to avoid that the driver’s operational visual field is shielded by both sides of the cab control station and thus the driver’s operation in the cab is disturbed. Further, the cab control station can have an increased longitudinal size so as to facilitate the driver’s operation with respect to operation devices on said cab control station in a simple and convenient way, so that the potential danger to the safety caused by the driver’s operation when leaning forward. In this embodiment, the control box 3321 has a trapezoidal bottom plate 33211, wherein the short side 332111 of the trapezoidal bottom plate 33211 is adjacent to the driver, and the long side 332112 is adjacent to the front cab windshield. The trapezoidal bottom plate 33211 is converged from the side adjacent to the front cab windshield to the side adjacent to the driver, so that reasonable and effective use of the interior space of the cab can be effected. A side plate connected to the short side 332111 of the trapezoidal bottom plate 33211 is the first control plate 33212 which can be removably connected to adjacent side plates and bottom plate 33211. In particular, the first control plate 33212 can be removably fixed to the edges of the side plate and bottom plate 33211 by screws. When corresponding device components are mounted on the first control plate 33212, the first control plate 33212 can be firstly detached for such mounting. The first control plate 33212 can also be detached for conducting service work with respect to the devices and related components in said control box3321. Two side plates of the bottom plate function as the second control plate 33213 and the third control plate 33214 respectively, wherein each of the second control plate 33213 and the third control plate 33214 is provided with an operation opening, which at its outer edge is removably connected to a cover plate 33215 for closing and opening said openings. The bottom plate 33211, side plates and cover plate 33215 are all provided with connection recesses for receiving related devices, so that related device components can be fixed in an effective and reliable way. For example, a loudspeaker 33216 can be mounted on the bottom plate 33211, other components like radio 33217 can be mounted on the first control plate 33212, and switch buttons 33218 and the like for some components are mounted on the cover plate 33215 of the second and third control plates 33213, 33214. The bottom plate 33211 is
136
2018233039 21 Sep 2018 welded to the cab side walls at an edged adjacent to the front cab windshield, and the upper edge of the side plates are welded to the cab roof plate. In this way, the bottom plate 33211, the side plates and the cab side walls enclose and form the control box3321 so as to obtain reasonable arrangement of the space in the cab and enhance its compactness and practicability.
[00309] As a preferable embodiment shown in fig. 38 and 39, the flexible ladder comprises a rigid paddle 3411 and side plates 3412 connected to both sides of the paddle
3411. The side plates 3412 are rigid and hinged to both sides of the paddle 3411, with a central axis of the two hinged members extending in a front to rear direction of the flexible ladder. With such structure, the flexible ladder has a great stiffness in the vertical direction and a great comfort for stepping on due to the rigid side plates 3412 and the paddle 3411. In addition, because the paddle 3411 is hinged to the side plates
3412, i.e. a deformable parallelogram is formed between the paddle 3411 and side plates 3412. The flexible ladder can be deformed freely in a lateral direction during movement of the vehicle, ensuring that the flexible ladder could not be damaged because of absorption of impact energy when the vehicle moves fast, i.e. it has very little lateral stiffness, a great impact resistance and a long service life. The above-mentioned paddle
3411 is provided at its end portion with a first mounting sleeve 34111, and the side plate
3412 connected correspondingly to the paddle 3411 is provided at its end portion with a second mounting sleeve 34121, wherein the first and second mounting sleeves 34111, 34121 form a shaft sleeve when jointing together, in which axle sleeve 34112 is mounted a pin shaft 34113. The paddle 3411 and side plate 3412 is hinged by means of the pin shaft 34113, so that a link pair is formed with a simple structure and lower cost, and it is easy to operate the mounting and detachment process. Further, the above-mentioned pin shaft 34113 is provided at both ends with an elastic retaining washer 34114. Said elastic retaining washer 34114 can prevent the movement of the pin shaft 34113 in the front and back direction during the use of the flexibility ladder, so as to further ensure the reliability of the hinge connection of the paddle 3411 to the side plate 3412.
[00310] As a preferable embodiment shown in fig. 40 to 43, the service ladder
137
2018233039 21 Sep 2018 comprises an upper ladder 3421, a lower ladder 3422, a connecting member 3423 and a retaining member for enhancing effectively the safety, comfort and stability of the service ladder during the service procedure, so that a service man can climb to a higher frame by means of the service ladder for service works, when the components of the mining dump truck is under service. The connecting member 3423 connects the upper ladder 3421 with the lower ladder 3422 so as to enable the lower ladder 3422 to be retracted into overlap with the upper ladder 3421. In this way, the mining dump truck can be allowed during operation to retract the lower ladder 3422 into the upper ladder
3421 to lift away from the ground, so that damage to the lower ladder 3422 due to impact by the obstacles on the ground can be avoided effectively, ensuring the lower ladder 3422 has a reliable operation life. The lower ladder 3422 is deployed with respect to the upper ladder 3421 under the action of the connecting member 3423, when the mining dump truck is under service, so that the service man can climb, from the lower ladder 3422 to the upper ladder 3421, up to the top for overhauling related components. Further, the connection of the connecting member 3423 with the upper ladder 3421 and lower ladder 3422 can be further configured for effecting the retracting movement of the lower ladder 3422 into the overlapping position with the upper ladder 3421. The connecting member 3423 is fixed to a transverse steel tube at the lower end of the upper ladder 3421 and is hinged to the lower ladder 3422, so that the lower ladder 3422 can be retracted by rotation with respect to the upper ladder 3421. That is, when the mining dump truck is under service and the lower ladder 3422 is retracted, the lower ladder
3422 can be rotated about the link pair, and the lower end is lifted and rotated about 180° to fold into a position parallel to the upper ladder 3421, so as to bring the lower ladder 3422 into overlap with the upper ladder 3421 in a simple and convenient way. In order to retract the lower ladder 3422 in a simple and convenient way and make the retracted service ladder compact and occupy a small space, the lower ladder 3422 has a width dimension less than the width of the upper ladder 3421 between its two interior sides, so that the retracted lower ladder 3422 is overlapped within the central portion of the upper ladder 3421. The connecting member 3423 comprises a base 34231 and two opposite
138
2018233039 21 Sep 2018 lugs 34232 projected from the base 34231 <> In this case, the base 34231 is provided with a fixation hole for passing through and attachment of the steel tube of the upper ladder 3421, while each lug 34232 is provided with a lug link hole 34233 and said two lug link holes 34233 are opposite to each other. In the meantime, the lower ladder 3422 is provided with a lower ladder link hole. When the lower ladder 3422 is connected with the connecting member 3423, a rotation shaft is passed through two lug link holes 34233 and the lower ladder link hole, so that the lower ladder 3422 and the upper ladder are rotatably connected. Further, a distance of the center of the lug link hole 34233 to the base portion of the lug 34232 is larger than a distance of the lower ladder link hole to the connection end edge of the lower ladder 3422. When the lower ladder 3422 is deployed to the position parallel to the upper ladder 3421, the lower ladder 3422 abuts against the retaining member fixed to the connection between the upper ladder 3421 and the lower ladder 3422, so as to avoid occurrence of a shaking and unstable lower ladder 3422 when it is affected by a force generated by climbing up of the service man. With such retaining member of this structure, a simple structure and simple and convenient manufacturing can be achieved and the deployed position of the lower ladder 3422 can be defined fully effectively. The retaining block 3424 is formed integrally with the connecting member 3423. The surface of the retaining block 3424 comprises a section of inclined surface 3424 land a section of planar surface 34242. When the retaining block 3424 is formed integrally with the connecting member 3423, the retaining block 3424 is extended from the base 34231 of the connecting member 3423 along a deploying direction of the lower ladder 3422, with a lower end edge of its inclined surface 34241 flush with the surface of the surface of the base 34231 that is in connection with the lug 34232. That is, a lower end edge of the inclined surface 34241 is flush with the base portion of the lug 34232, while its higher end edge is joined with the edge of the planar surface 34242. As to the above-mentioned planar surface 34242, the lower ladder 3422 abuts against it to effectively define its position in the deployed state of the lower ladder 3422, whereas the above-mentioned inclined surface 34241 can provide the lower ladder 3422 with a rotation space, so as to avoid blockade to the connection end of the lower ladder 3422 during the retracting and deploying process of the lower ladder 3422.
139
2018233039 21 Sep 2018
The service ladder further comprises a handrest 3415, and the upper ladder 3421, the lower ladder 3422 and the handrest 3415 are all formed by welding steel tubes. Due to the larger stiffness of a steel tube, deformation resistance can be enhanced effectively so as to guarantee the safety during stepping on of the service man and prolong effectively the service life of the service ladder. The upper ladder 3421 and the handrest 3415 are welded integrally so as to define precisely the position of the handrest 3415 and the upper ladder 3421, reduce the mounting work load of the service ladder and enhance the mounting efficiency. In order to reliably fix the position of the lower ladder 3422 during retracting movement, the service ladder further comprises a clamp connection assembly 3416. The clamp connection assembly 3416 comprises two pairs of clamp connection holes 34161 and clamp pins 34162 inserted into each pair of clamp connection holes 34161, wherein one clamp connection hole of each pair of clamp connection holes 34161 is provided on the upper ladder 3421, the other is provided on the lower ladder 3422. When the upper ladder 3421 is overlapped with the lower ladder 3422, the openings of the clamp connection holes in each pair are opposite to each other. Then the clamp pin 34162 is inserted through two clamp connection holes 34161 to connect the lower ladder 3422 with the upper ladder 3421, so that the retraction position of the lower ladder 3422 is defined effectively and stably.
[00311] Shown in fig. 26 to 28, a platform of a platform assembly 311 further includes four mounting components for positioning and connecting the platform and a frame, each mounting component 311 including a positioning shaft 3111, a positioning piece 3112 and a fixing piece 3113, wherein the positioning piece 3112 is fixedly connected to a lower end surface of the platform 3114 by soldering and a notch of a positioning slot 31131 of the positioning piece 3112faces down, the positioning shaft 3111 is fixedly connected to a beam of the frame by soldering with its axis horizontally disposed, the fixing piece 3113 is also provided with a positioning slot 31131 with the notch facing up; the fixing piece 3113 is fixedly connected to the positioning piece 3112 by screws and their positioning slots 31131 form a mounting hole O of the shrunk-on positioning shaft 3111 after splicing.
[00312] The positioning shaft 3111 is soldered on the frame beam, the positioning piece
140
2018233039 21 Sep 2018
3112 specifically being of a plate structure with a plain bottom surface 31122, and the positioning piece 3112 is connected onto the platform 3114 by soldering through its bottom surface 31122, its top surface 31121 being plain and provided with the positioning slot 31131. From the direction of the top surface 31121pointing to the bottom surface 31122, the cross section area of the positioning piece 3112 progressively increases to form a trapezoid-like structure, its left-side face 31123 and the right-side face 31124 being smooth curved surfaces. The positioning piece 3112 has a relatively large soldering surface area with the frame, to enhance their connection reliability and strength, while controlling the volume and weight of the positioning piece 3112 as much as possible. The left and right side faces of this positioning piece 3112 are both smooth curved surfaces, which, in this way, can make the positioning piece 3112 have a relatively small concentrated stress under the action of external loads, thereby increasing its shock resistance performance.
[00313] The shape of the cross section of the fixing piece 3113 includes an arc segment 311311 forming the positioning slot 31131 and two straight-line segments positioned at the two end portions of this arc segment 311311. The two straight-line segments 311312 are both provided with a mounting through hole with its center line perpendicular to the axis of the positioning slot 31131. The two straight-line segments 311312 of the fixing piece 3113 and the top surface 31121 of the positioning piece 3112 are jointed, and their positioning slots S form the mounting hole O of the shrunk-on positioning shaft 3111 after splicing. The two screws respectively pass through the mounting through hole of the two straight-line segments 311312, and are in threaded connection with threaded holes of the positioning piece 3112. The fixing piece 3113 has a unique and smart structure, and can control the volume and weight of the fixing piece 3113 as much as possible on the basis of satisfying the function of the fixing piece 3113 and the positioning piece 3112 positioning and fixing the positioning shaft 3111 after splicing. After the positioning piece 3112 and the fixing piece 3113 are fixedly connected by screws, the mounting holeO formed by splicing their positioning slots S is specifically an elliptic mounting hole with a minor diameter adapted to the shaft diameter of the positioning shaft 3111 and a major diameter greater than the shaft diameter of the
141
2018233039 21 Sep 2018 positioning shaft 3111. The distance between a plurality of positioning shafts on the frame is theoretically equal to that between a plurality of positioning pieces on the platform. However, the practical distance of work pieces tends to be different due to deformation during and after soldering. Since the elliptic mounting hole has a certain adjusting ability in the direction of the major diameter, it is possible to compensate the above generated error.
[00314] A main relay in an electrical cabinet of the platform assembly 31 has relatively long service life and relatively high reliability. In a specific embodiment, the electrical cabinet is provided therein with the main relay 3121 which is fixedly mounted in the electrical cabinet. The axis direction of a coil 31211 of the main relay 3121 has a predetermined angle with a driving direction of a dumper, the predetermined angle greater than 0 degree and smaller than 180 degrees, preferably ranging from 45 degrees to 135 degrees. When the predetermined angle is greater than 45 degrees and smaller than 135 degrees, a component force of an impact force in the axis direction of the coil 31211 is small, with a relatively small acting force causing looseness of the coil 31211. In a preferred embodiment, the axis direction of the coil 31211 of the main rely 3121 is perpendicular to the driving direction of the dumper. When the dumper accelerates or decelerates, the direction causing impact is perpendicular to the axis direction of the coil 31211, and the component force in the axis direction of the coil 31211 is zero. The impact force during the acceleration or deceleration would not cause looseness of the coil 31211, and would not make the coil 31211 lose power or weaken the magnetic field, which ensures good contact and increases the reliability of the coil 31211. In this mounting manner, the axis direction of the coil 31211 is perpendicular to the driving direction of the dumper, e.g. the predetermined angle is 90 degrees. The predetermined angle can be either standard 90 degrees or can be located in a relatively small angle range with 90 degrees as a center. The main relay mounted in this manner within the electrical cabinet has longest service life, is less likely to make the coil 31211 loosen, and has relatively high reliability during use.
[00315] The main relay 3121 is a main supply relay of an engine control unit, for providing power supply for the engine control unit and controlling an ignition system of
142
2018233039 21 Sep 2018 a vehicle. The main relay includes an iron core 31212, thecoil 31211 and an armature 31213, wherein the coil 31211 is wounded on the iron core 31212, the coil 31211 generates the magnetic field when powered on, and attracts the armature, so that a movable contact is contacted with a normally open stationary contact or disconnected from a normally closed stationary contact. The main relay 3121 is positioned in the electrical cabinet of the dumper, the axis direction of the coil 31211 having a predetermined angle with the driving direction of the dumper, the predetermined angle between 0 degree and 180 degrees. When the dumper accelerates or decelerates during traveling, the members of the vehicle will be certainly impacted due to inertia. The direction of the impact is identical with the driving direction, but is not identical with the axis direction of the coil 31211. The coil 31211 is wounded in the axis direction, the force in the axial direction of the coil 31211 causing the looseness of the coil 31211. The acting force causing the looseness of the coil 31211 is only the component force of the impact force in the axis direction of the coil 31211, only part of the component force of the impact force.
[00316] In a specific embodiment, a housing of the main relay 3121 is provided with a bracket 31221 at the lower side, and the main relay 3121 is mounted inside the electrical cabinet through the bracket 31221. The main relay 3121 is mounted inside the electrical cabinet through the bracket 31221 at the lower side of the housing, so the bracket 31221 can ensure the mounting reliability, and that the main relay 3121 itself is not loosened during the dumper traveling. Further, one end of the bracket 31221 is soldered with the housing of the main relay 3121, the other end detachably connected with the mounting plate inside the electrical cabinet. One end of the bracket 31221 is soldered with the housing of the main relay 3121, which soldering can ensure the reliable connection between the bracket 31221 and the housing of the main relay 3121; there can be provided a mounting plate dedicated to mounting the main relay 3121 inside the electrical cabinet. The other end of the bracket 31221 is detachably connected with the mounting plate, which is convenient to replace the main relay 3121.
[00317] Therefore, it is possible to compensate the above generated error. Shown in fig.
to 32, unlike the prior art, the platform assembly of the mining dumper of the present
143
2018233039 21 Sep 2018 invention is additionally provided with a platform supporting device 313 which is mounted at the bottom surface of the platform assembly, for enhancing the supporting rigidity and connection strength of the platform. Specifically, the platform supporting device 313includes a portal frame3131 and an extending beam 3132. The portal frame 3131 is of an arcuate structure with its beam 31311 being the top portion of the arcuate frame, and the two ends of the beam 31311 extending outwards, thereby being capable of being detachably connected with the extending beam 3132. By adopting the manner of detachable connection, it is possible to split the platform supporting device 313 during transshipping the same. The respective transshipping of the portal frame 3131 and extending beam 3132 ensures its respective passing ability and makes transportation convenient. Moreover, both the beam 31311 and extending beam 3132 are provided with the supporting piece 3133 for supporting the platform. The supporting piece 3133 abuts to the platform beam and is fixedly connected therewith, thereby effectively connecting the platform and the platform supporting device 313.
[00318] In this solution, this extending beam 3132 is a hollow beam, which can not only reduce the weight of the platform supporting device 313, but also sufficiently ensure the strength of this extending beam 3132. Further, one side of a peripheral wall plate 31321 of the hollow beam is provided with an operating opening, the bottom side provided with this operating opening, that is the operating opening is provided on the bottom wall plate. With such arrangement, on one hand, it is possible to further reduce the weight of the platform supporting device 313, and on the other hand, when the end plate of the hollow beam is provided with a bolt hole, it is convenient to mount a fastening bolt from the inner side of the hollow beam, with simple and convenient operation. Further, the peripheral wall plate 31321 of the hollow beam is integrally formed by bending a piece of steel plate. That is to say, except for two end plates, each side wall of the hollow beam is formed by bending a piece of steel plate. With such arrangement, the side wall of the hollow beam enclosed by a piece of steel plate is easy for machine shaping, and has a simple structure and relatively high stability and reliability. With the above arrangement, it is possible to provide support for the two sides of the width direction of the platform through this extending beam 3132, strengthen the reliable and stable supporting action
144
2018233039 21 Sep 2018 of the platform supporting device 313 for the platform , effectively avoids the platform being intensively stressed when only connected to the relatively narrow area of the portal frame 3131, greatly enhances the supporting rigidity and connection strength of the platform , and guarantees the reliable and stable operation of each member loaded on the platform . This supporting piece 3133 may further include a supporting pin roll
31331 and a supporting base 32for clamping this supporting pin roll 31331. For this supporting pin roll 31331, its end portion is provided with a limiting step, thereby limiting the supporting base 31332, so as to avoid the axial movement of the supporting base 31332 with respect to the supporting pin roll 31331, and effectively connect the supporting pin roll 31331 and the supporting base 32 in a clamping manner; moreover, the end portion of the supporting pin roll 31331 extends out of the end plate of the extending beam 3132 and the side wall surface of the beam 31311, and abuts to the bottom beam 3134 of the platform , so as to support the platform .The supporting base
31332 is connected with the supporting pin roll 31331 in a clamping manner on the one hand, and is fixedly connected to the platform beam of the platform on the other hand. With such arrangement, the supporting pin roll 31331 abuts to the bottom beam 3134 by the supporting base 31332, thereby realizing the reliable and stable supporting effect of the platform supporting device 313. This supporting base 31332 supports the supporting pin roll 31331 from the bottom, is fixedly connected onto the platform bottom beam 3134, stably and reliably fixes the supporting piece 3133, and is also convenient to detach and mount.
[00319] Further, a first end plate 31121 of the extending beam 3132 is provided with a first pin roll through hole 313231 through which the supporting pin roll 31331runs, the supporting pin roll 31331 fixed with the edge of the first pin roll through hole 313231 by soldering, thereby ensuring the supporting rigidity of the supporting pin roll 31331 and increasing the connection reliability. In order to effectively enhance the supporting rigidity of the supporting pin roll 31331 at this position, it is also possible to provide a rib plate at the inner side of the hollow beam, and arrange an intersecting hole through which the supporting pin roll 31331 passes at the rib plate, thereby effectively defining the position of the other end portion of the supporting pin roll 31331, enhancing the
145
2018233039 21 Sep 2018 stability of the supporting pin roll 31331 at this position, and ensuring the reliable supporting action of the platform. For the second end plate of this extending beam 3132, its edge extends out of the peripheral wall plate 31321 of the extending beam 3132, thereby forming a mounting support plate connecting the end portion of the beam 31311. This mounting support plate protrudes the top portion of the peripheral wall plate 31321 of the extending beam 3132, and is provided thereon with four mounting holes 313261which fasten the extending beam 3132 and the beam 31311 by fitting bolts.
[00320] For the above embodiments, the beam 31311 is also provided with a second pin roll through hole 313111through which the supporting pin roll 31331 runs. The two ends of the supporting pin roll 31331 extend out of a porthole of the second pin roll through hole 313111. Eikely, the supporting pin roll 31331 and the edge of the second pin roll through hole 313111 are fixed by soldering. The supporting pin roll 31331 is perpendicular to the beam 31311, and penetrates this beam 31311 through the second pin roll through hole313111. With such arrangement, it is possible to increase the supporting rigidity of the supporting pin roll 31331, and effectively carry the platform, thereby guaranteeing the enhanced connection strength and supporting rigidity of the platform.
[00321] The compartment assembly comprises a hopper 41, a lifting mechanism 42 and a weighing mechanism 43, wherein the lifting mechanism 42 is located in a front portion of the hopper 41 for lifting the hopper 41, and the weighing mechanism 43 is located beneath the hopper 41 for obtaining the weight of the hopper, in other words for obtaining the load of the dump truck.
[00322] The hopper 41 comprises a bottom plate 4101, a front plate 4102 and a first side plate 4103 located on the left side in a forward direction, and a second side plate 4104 on the right side which are welded in sequence. The horizontal end portions of the bottom plate 4101 are folded inwards from the hopper 41 interior side by the roll bending process to form circular-arc shaped connection portions S projecting outward. The first side plate 4103 and the second side plate 4104 are straight plates, and the first side plate 4103 and the second side plate 4104 are welded to the bottom plate 4101 by means of two circular-arc shaped connection portions S respectively. The circular-arc shaped connection portions S are formed by bending the bottom plate 4101, and a lower
146
2018233039 21 Sep 2018 edge of the front plate 4102 is bended towards the compartment interior inside to form circular-arc shaped connection portions S projecting outward from the compartment, and is welded to the bottom plate 4101 by means of the circular-arc shaped connection portions S. The bottom plate 4101 has a thickness greater than the thickness of the first side plate 4103, the second side plate 4104 or the front plate 4102.
[00323] As a preferable embodiment, in order to enhance the hardness and load capacity of the hopper 41 and prevent dusts from being adhered to corners of the panel of the hopper 41, the hopper 41 further comprises an enforcement plate 4106, and the front plate 4102 is directly welded to the left and right side plates via its straight portion, i.e. a sharp corner structure is formed. In order to enhance the connection strength therebetween, an enforcement plate 4106 is provided at the connection of interior plates of the hopper 41, the enforcement plate 4106 is welded at its one end to the front plate 4102 and at the other end to the left and right side plates. The enforcement plate 4106 is a circular arc shaped enforcement plate projecting outward from the compartment. No air flowing occurs inside the closed environment after welding, so that the load capacity of the dump truck is increased, while it is possible to overcome the problem of reduction in load capacities of auxiliary components in prior art due to rust after long-term service. [00324] As a preferable variation of this embodiment, the auxiliary enforcement components of the hopper 41 comprises a near-ground enforcement beam, which includes a transverse beam 4107 and a longitudinal beam 4108. The transverse beam 4107 and the longitudinal beam 4108 are provided on the near-ground surface of the hopper 41 in a perpendicular crossing way. In order to increase the stiffness of the hopper 41, the longitudinal beam 4108 is preferably extended to the top of the front plate of the hopper 41. Vertical ribbed plates4109 are welded onto the first side plate 4103 and the second side plate 4104 at their upper side walls respectively, wherein the vertical ribbed plate 4109 has the same length as that of the upper edge of the side wall. The compartment bottom plate is welded to other plates by circular-arc shaped connection portion S, so that stress concentration areas for respective weld seam are avoided and it is possible to remove the problem of overlap of weld seams with stress concentration areas. In addition, less stress concentration occurs in the circular-arc shaped connection
147
2018233039 21 Sep 2018 portions, so that the stiffness and impact resistance of the hopper are substantially enhanced. In addition, because the mining dump truck has a predetermined sum of the deadweight and carrying load, the weight of the hopper can be reduced and thus the load capacity of the whole vehicle can be enhanced, after a large amount of the vertical ribbed plate s at the weld seams are omitted in this solution.
[00325] The compartment side plate is provided with an auxiliary enforcement member, including a vertical ribbed plate 4109 and an anti-drop tube 4111, wherein the vertical ribbed plate 4109 is located on the outer wall of the side plate in the vertical direction, and the anti-drop tube 4111 is located on the top of the side plate and is in a fixed connection between the vertical ribbed plate 4109 and the side plate.
[00326] The compartment side plate 4104 comprises aside plate body 4110 and a vertical ribbed plate 4109 provided outside the side plate body 4110, wherein the vertical ribbed plate 4109 is of folded structure and fixed to the outside of the side plate body 4110. The side plate 4104 further comprises an anti-drop tube 4111 which at its lower end is fixed to the vertical ribbed plate 4109 and at its interior is fixed to the side plate body 4110. An enforcement component 4113 is further fixed between the lower outside of the anti-drop tube 4111 and the upper end of the vertical ribbed plate 4109. The enforcement component 4113 is a horizontal support plate, and it is possible to provide a plurality of such support plates which are separated from each other vertically along the side plate body 4110. Alternatively, the enforcement component 4113 can also be one monoblock enforcement plate extending in the horizontal direction.
[00327] The side plate 4104 is further provided at its outside with a horizontal ribbed plate 4112, and the vertical ribbed plate 4109 at its front end is embedded with a horizontal ribbed plate 4112, wherein the front end of the anti-drop tube 4111 abuts against the horizontal ribbed plate 4112. Such structure can reduce the occurrence of cracking or penetrating through when the side plate 4104 is hit, so as to enhance the operational stability of the side plate 4104. In addition, the fixed connection of the vertical ribbed plate 4109, the side plate body 4110 and the anti-drop tube 4111 enables the side plate 4104 to have a larger strength. When an object falls down to the edge of the side plate 4104, the curved profile of the anti-drop tube 4111functions to guide and
148
2018233039 21 Sep 2018 damp to some extent, so that the object can easily slide off to both sides of the anti-drop tube 4111 and impact to the top surface of the side plate 4104 is reduced and the fatigue performance of the top surface of the compartment side plate 4104 is enhanced. The front end of the vertical ribbed plate 4109 embedded with the horizontal ribbed plate 4112 can further enhance the hopper strength as whole. Even if the anti-drop tube 4111 is damaged by falling objects during long-term operation, due to that the anti-drop tube 4111 is not embedded at its front end into the horizontal ribbed plate 4112, it is possible to remove easily the anti-drop tube 4111, replace and mount a new anti-drop tube 4111 by simple operations, without any need for removing the vertical ribbed plate 4109 embedded in the horizontal ribbed plate 4112 during the whole replacement process.
[00328] The hopper 41 further comprises a hopper shed 4105 which is located above the cab in the front of the truck body. A pantograph is provided on the upper surface of the hopper shed 41051, and projections or grooves directly beneath the pantograph are located on the lower surface of the hopper shed 41052 for enhancing the mechanical strength of the shed, so that the hopper shed 4105 has a higher stiffness and impact resistance.
[00329] As a preferable variation of this embodiment, the shed’s near-ground surface of the hopper shed 4105 comprises a plurality of projections b and/or grooves s for enhancing the stiffness of the shed. The shed 4105 is made of high strength steel plates. Each of the projections b and/or grooves s has the same length as the shed 4105 in the vehicle traveling direction. Said plurality of projections b of the shed 4105 are separated into several groups of projections b, which groups are arranged at a distance from each other in sequence along a direction perpendicular to the vehicle traveling direction and each of which comprises only one or three projections b with a length extending in a direction parallel to the vehicle traveling direction. That is, it is extended from the front end of the shed 4105 to its rear end.
[00330] Four edges of the shed 4105 are welded with enforcement plates 41053 respectively, which enforcement plate has a plate surface perpendicular to the plate surface of the shed 4105 and is fixed to the projections b or/and grooves s. On the shed 4105, several projections b and grooves s are formed by pressing or bending in a
149
2018233039 21 Sep 2018 staggered arrangement. That is, one groove s is located between two adjacent projections b. Since a lot of enforcement ribs which are welded to the base plate in prior art are omitted from this hopper shed, the welding process is omitted, manufacturing cost is reduced, and the problem of reduction in load capacity of the shed due to seam cracking under fatigue is ended. In the meantime, because the mining dump truck has a predetermined sum of the of the deadweight and carrying load, the weight of the hopper can be reduced and thus the load capacity of the whole vehicle can be enhanced, after a large amount of the enforcement ribs welded to the hopper are omitted.
[00331] The pantograph comprises cables and hydro pipes (hereunder collectively referred as pantograph lines), wherein the cables are provided for transferring the electric energy from the power net to the drive assembly of the vehicle, and the hydro pipes are provided for controlling the telescopic movement of the pantograph. When the mining dump truck is unloading, the hopper 41 will be turned up about the swivel hinge point of the frame 45 with respect to the frame 45, and the hopper 41 falls down to its original position after unloading. The cables and hydro pipes are extended from the pantograph 44 to the swivel hinge point between the hopper 41 and the frame 45 and further to the control cabinet of the dump truck’s drive assembly along the frame 45. The pantograph lines 441 comprises following laying path: it is extended from the pantograph 44 and then rearward from the bottom surface of the hopper shed 4105 and downward along the compartment front plate 4102, rearward along the compartment bottom plate 4101 to the swivel hinge point, wherein the pantograph lines 441 passes through the hopper shed 4105 to the bottom surface so as to reduce the laying path for the pantograph lines 441. The pantograph lines 441 is extended again from the swivel hinge point along the top surface of the frame 45 in a forward direction to the front portion of the vehicle in which the cab 32 is located, i.e. the location in which the control cabinet is located, and is plugged into control cabinet from the platform in an ordinary way. In order to further reduce the laying path for the pantograph lines 441, the pantograph lines 441 can be extended rearward from the bottom surface of the hopper shed 4105 and downward from the central line of the compartment front plate 4102 and then rearward along the central line of the compartment bottom plate 4101 to the swivel
150
2018233039 21 Sep 2018 hinge point.
[00332] In this embodiment, a lifting bearing comprises a connection transverse beam and two bearing head 4252 which are respectively welded to both ends of the connection transverse beam, wherein the connection transverse beam is a steel tube and is welded to the frame of the mining dump truck, and each of the bearing head 4252 is hinged to a corresponding lifting hydro-cylinder via joint bearings 42522. One axial end of the bearing head 4252 is in a press fit with a mounting opening in the inner ring of the joint bearing 42522 and fixed thereto. A piston rod of the lifting hydro-cylinder is in fixed connection with the outer ring of the joint bearing 42522. Each bearing head 4252 and the connection transverse beam are prepositioned and connected via matching positioning hole and positioning shaftand then welded to each other.
[00333] The positioning hole in this embodiment is provided on the connection transverse beam, and the positioning shaft is formed in the bearing head 4252 accordingly. The bottom surface of the positioning hole in the connection transverse beam is abutted against the axial end face of the positioning shaft of the bearing head 4252. The bearing head 4252 and connection transverse beam have welding surfaces as circular welding surface concentric to the positioning hole and positioning shaft which are welded in a circumferential direction after they have been positioned by such matching positioning hole and positioning shaft, so that the connection transverse beam and bearing head 4252 are connected by butt welding. The bearing head 4252 comprises weight reducing openings on its welding surface, and the bearing head 4252 has vents thereon which are in connection with the weight reducing openings.
[00334] In this embodiment, each bearing head 4252 is hinged to a lifting hydro-cylinder via joint bearing 42522 correspondingly. The bearing head 4252 is in press fit with the inner ring of the joint bearing 42522 and the lifting hydro-cylinder is in fixed connection with its outer ring. The bearing head 4252 comprises a fixing portion and a welding portion in the longitudinal direction of the transverse beam. The fixing portion is a cylindrical shaft that matches with the mounting opening of the joint bearing 42522 inner ring, which shaft has a transition portion to the welding surface in form of smooth curved surface. In this embodiment, it is possible to effect the butt welding of
151
2018233039 21 Sep 2018 the welding surfaces in a rapid and precise way by means of clever improvement on the structures of the bearing head 4252 and connection transverse beam and also the assembling process with prepositioning and welding, so as to reduce the welding period and enhance welding efficiency and assembly precision. The positioning shaft and positioning hole are in insertion fit, so that a restraining force can be applied to the bearing head 4252 and connection transverse beam in the radial direction of the positioning hole so as to enhance the reliability of the connection therebetween. The positioning hole, positioning shaft and welding surfaces are concentric, so that when the lifting hydro-cylinder drives in a telescopic way the hopper to turn relatively to the frame, the connection transverse beam and bearing head 4252 are loaded uniformly, so that the connection strength between the connection transverse beam and bearing head 4252 is increased and the service life of the lifting bearing 425 is extended.
[00335] The lifting hydro-assembly 421 comprises a lifting hydro-cylinder 100 and a balance valve 424 located between a cavity with rod and a cavity without rod of the lifting hydro-cylinder. The lifting hydro-cylinder is provided for lifting the hopper of the dump truck, and comprises a cavity with rod and a cavity without rod and functions to adjust the telescopic movement of the piton rod by means of alternatively feeding and discharging oils in cycle between said two cavities, so that the hopper hinged to the cylinder body 4221 is controlled to rise and fall. The balance valve 424 is mounted on the lifting hydro-cylinder 422 with a feeing port and a discharging port in butt connection with the oil port of the cavity with rod, whereas the control oil port of the balance valve is in butt connection with the oil port of the cavity without rod. The oil port of the cavity with rod and the oil port of the cavity without rod are located on a ring lug 4222 of the piston rod of the lifting hydro-cylinder, in which the balance valve 424 is inserted, and the control oil port of the balance valve 424 has a predetermined open/close pressure that is adjustable. When the hopper is subject to a reverse loading so as to cause the pressure in the cavity without rod to reduce suddenly, the balance valve 424 functions to adjust the pressures in the cavity with rod and in the cavity without rod so as to avoid abnormal movement due to the reverse loading on the cylinder body 4221. The balance valve 424 is directly mounted on the lifting hydro-cylinder and is in rigid
152
2018233039 21 Sep 2018 connection with the lifting hydro-cylinder, wherein the feeding port and discharging port of the balance valve 424 are associated with the oil port of the cavity with rod and the control port of the balance valve 424 is associated with the oil port of the cavity without rod.
[00336] As a preferable variation of this embodiment, the lifting hydro-assembly 421 comprises two lifting hydro-cylinders, wherein the first lifting hydro-cylinder and the second lifting hydro-cylinder are inserted with a balance valve. When the first lifting hydro-cylinder and the second lifting hydro-cylinderare loaded differently, both cylinders move asynchronously, resulting in asynchronous movement of the connection portion between the first lifting hydro-cylinder and the second lifting hydro-cylinder of the hopper 41. In this case, the inductive load for the different open/close pressure can be adapted by adjusting two balance valves 424, so that the output power of said two lifting hydro-cylinders can be adjusted and thus the movement of said two lifting hydro-cylinders can be synchronized to keep the hopper 41 in load balance. In the present lifting hydro-assembly 421, the balance valve 424 is directly mounted on the lifting hydro-cylinder 422 and no oil pipe is connected between the balance valve 424 and the cavity with rod. While a high pressure is established in the cavity with rod, said high pressure cannot be transferred to any oil pipe because oil pipes are not involved in the whole operation procedure of the balance valve 424, so that the operational reliability of the balance valve 424 is ensured, with the balance valve remaining in an effective working condition.
[00337] The hydro-pneumatic control assembly comprises an engine exhaust mechanism, a dry-oil lubrication station control assembly, electrical elements which can be operated by ground operators outside the vehicle and a driver-operated and electric integrated diagnose box. Particularly, the engine exhaust mechanism comprises a plurality of exhaust pipes and many mufflers connected respectively to outlet ends of said plurality of exhaust pipes, wherein at least one of the mufflers is located at one side of an upper ring beam of the vehicle adjacent to the headstock and others are located another side of the upper ring beam of the vehicle adjacent to the tailstock. The exhaust pipes are arranged parallel to the upper ring beam, the outlet ends of the exhaust pipes
153
2018233039 21 Sep 2018 are connected to the mufflers by means of bellows, and the exhaust pipes and mufflers are fixed beneath the platform of the vehicle by connection mechanism. The dry-oil lubrication station control assembly is provided for checking the working state of the dry-oil lubrication station of the mining dump truck and is mounted on a cylinder body of the dry-oil lubrication station, comprising a monitoring part 521, a conducting part 522 and a fixing part 523. The monitoring part comprises a lubrication control component for switching on/off a lubrication pump in the dry-oil lubrication station, the conducting part 522 is provided for putting the monitoring part and the dry-oil lubrication station into connection, and the fixing part 523 can mount the dry-oil lubrication station control assembly on the dry-oil lubrication station. The dry-oil lubrication station control assembly 52 comprises a box and a mounting support for connecting the box and the dry-oil lubrication station, wherein the monitoring part is located on the top of the box and the conducting part 522 is located on the side wall of the box. The monitoring part further comprises an oil level monitoring component for detecting the lubrication oil volume in the dry-oil lubrication station, which comprises a low level indication lamp and a high level indication lamp both of which are connected to oil level sensors in the dry-oil lubrication station to receive a low level signal and a high level signal respectively. The ground control electric elements are integrated in the control box 53 which is fixed to the bumper in the front of the headstock, wherein the control box has a lid that can opened laterally for operation. The control elements in the control box include a battery main break switch 531, a stair lamp switch and/or a service lamp switch and/or an engine emergency stop button. The diagnose box on the dump truck is located on a cab instrument console with communication ports for many electrical control devices of the mining dump truck integrated therein, which electrical control devices can transmit signals with an exterior processor via said communication ports integrated in the same collection diagnose box so as to monitor or detect the working conditions of the electrical control devices, wherein the electrical control devices can be vehicle control unit and/or engine ECU and/or drive unity and/or display. The collection diagnose box comprises a box lid, a box body and a box lock, wherein the box body is formed with opening. The electrical control devices comprise data
154
2018233039 21 Sep 2018 communication lines leading to the cab instrument console, one end of which lines includes a communication port and which is introduced to the cab instrument console from its backside.
[00338] As shown, the exhaust assembly in this embodiment comprises two exhaust pipes, i.e. the first exhaust pipe 511 and the second exhaust pipe 512, and also two corresponding mufflers, i.e. the first muffler 513 and the second muffler 514. The first muffler 513 is connected to the outlet end of the first exhaust pipe 511 and both are located on the rear side of the upper ring beam of the vehicle, whereas the second muffler 514 is connected to the outlet end of the second exhaust pipe 512 and both are located on the front side of the upper ring beam of the vehicle. An embracing hoop 5111 is fixed on the exhaust pipe and a ferrule5131 is fixed on the muffler, wherein the embracing hoop 5111 and ferrule 5131 are hanged on the lower side of the vehicle platform via hangers.
[00339] As a preferable variation of this embodiment, two exhaust pipes and two mufflers are provided respectively. However, the number of the exhaust assembly in this application is not limited thereto.
[00340] In the engine exhaust assembly of this embodiment, at least one muffler is located on one side of the upper ring beam of the vehicle adjacent to the headstock, and other mufflers are located on another side of the upper ring beam of the vehicle adjacent to the tailstock. Because the engine is located in front of the upper ring beam of the vehicle, the exhaust pipe which is connected to the muffler in the front of the upper ring beam does not have to pass by under the upper ring beam, rather can be directly connected to the muffler in the front of the upper ring beam, so that the lay-out of the engine exhaust pipes are simplified accordingly and it facilitates the mounting and arrangement of the exhaust pipes with less time and effort. In addition, many mufflers are distributed at the front and rear sides of the upper ring beams, so as to avoid congested space at the rear side of the upper ring beam and to simplify the spatial arrangement at the rear side of the upper ring beam.
[00341] As a preferable variation of this embodiment, the dry-oil lubrication station control assembly 52 is provided with a monitoring part, a conducting part 522 and a
155
2018233039 21 Sep 2018 fixing part 523, wherein the monitoring part comprises a lubrication control component for switching on/off a lubrication pump 520 in the dry-oil lubrication station, and the conducting part 522 is provided for putting the monitoring part and the dry-oil lubrication station into connection so as to monitor related actuators in the dry-oil lubrication station. The dry-oil lubrication station control assembly 52 further comprises a box and a mounting support 523 as the fixing part 523 fixed to the bottom of the box and the cylinder of the dry-oil lubrication station, which mounting support 523 is provided with a mounting groove 5231 and legs 5232, by mean of which mounting groove the box 524 of the dry-oil lubrication station control assembly 52 can be mounted and fixed to the bottom surface thereof. In the meantime, the dry-oil lubrication station control assembly 52 is supported by the legs 5232 and fixed to the cylinder surface of the dry-oil lubrication station. The monitoring part is provided on the top of the box 524 and the conducting part 522 is located on the side wall of the box, wherein the monitoring part and conducting part 522 are integrated with the box 524, and conductors and relays and terminal blocks which are connected to related monitoring part and conducting part 522 via conductors can be located within the box 524. The top of the box 524 is formed as a removable cover plate 5241 for facilitating wire connection and investigation within the box 524. The cover plate 5241 is fixed to the body of the box 524 by screws. The oil level monitoring component comprises a low level indication lamp 5213 and a high level indication lamp 5214 both of which are connected to oil level sensors 5212 in the dry-oil lubrication station for receiving a low level signal and a high level signal. As shown, the conducting part 522 is provided with five ports 5221, each of which is connected to the corresponding monitoring part and actuators in the dry-oil lubrication station via conductors, wherein a first exterior interface is connected to the oil level sensor 5212 via external conductors and to the low level indication lamp 5213 and high level indication lamp 5214 via internal conductors, a second interface is connected to the lubrication pump 520 via external conductors and to the relay located in the dry-oil lubrication station control assembly via internal conductors, which relay is connected outwardly to the cab controller via a third interface and the controller is further connected to a fourth interface via conductors so as to be
156
2018233039 21 Sep 2018 connected with the lubrication control member, and a fifth interface is connected to a solenoid valve 5201 which controls the feed and discharge of the lubrication oil of the lubrication pump 520 via external conductors so as to be connected to the relay and thus to the cab controller via the third interface for outputting control signals. The controller is also connected to the fourth interface via conductors so as to be connected to the lubrication control member. The dry-oil lubrication station control assembly is provided for checking the working condition of the dry-oil lubrication station in the mining dump truck. With the above-mentioned design, the lubrication control member and conductors can be integrated into the cylinder of the dry-oil lubrication station to facilitate intuitive watching of the working condition of the lubrication pump during service operation, enhance service efficiency effectively and ensure reliable and stable operation performance of the dry-oil lubrication station.
[00342] In this embodiment, the control box can be mounted on a battery casing adjacent to the battery main break switch 531 at a left position in the traveling direction, and the control box as well as the power box are mounted on the bumper. In order to facilitate taking power from the battery casing by the battery main break switch 531 and reduce the wire length between the battery casing and the battery main break switch 531, the battery main break switch 531 may comprise a primary main break switch 5311 and a secondary main break switch 5312, wherein the primary main break switch 5311 is a power main switch and the secondary main break switch 5312 is only used for feeding power to the engine. The control box further comprises a stair lamp switch 5321 and/or a service lamp switch 5322 and/or an engine emergency stop button 5323 therein. A threading hole 5331 is provided on the box between the operation panel 532and the mounting panel 533 for connecting wires to targeted elements like stair lamp, service lamp, engine ECU, etc...Seal strips can be provided on the butted edges of the box lid and body of the control box, which seal strips shall achieve Ingress Protection IP65. With such electric elements integrated with the control box, on one hand, the box can protect the operation panel from each side thereof so as to prevent mud from splashing onto the operation panel, and on the other hand, the lid can protect the operation panel from its front side so as to prevent mud from splashing onto the operation panel from
157
2018233039 21 Sep 2018 this front side. Therefore, the ground control electric elements on the operation panel can be protected from being splashed by mud so as to reduce the failure rate and prolong the service life of the ground control electric elements.
[00343] As a preferable variation of this embodiment, the collection diagnose box of the dump truck is located on the cab instrument console for facilitating driver’s operations, wherein the instrument console is provided for mounting display, various instruments and fan opening, etc., and the collection diagnose box is embedded within the cab instrument console. That is, the collection diagnose box has a body 541 recessed with respect to the surface of the cab instrument console, whereas the collection diagnose box also has an opening lying in the same plane as the surface of the cab instrument console. The electrical control device is further connected to a data communication line, one end of which data communication line is connected to the electrical control device and the other end of which comprises a communication port544. The data communication line is extended from the electrical control device to the cab instrument console and the communication port is fixed in the collection diagnose box, for enabling the electrical control device to transfer signals to external processors like lap-top via the communication port.
[00344] The collection diagnose box has a plurality of communication ports of the above-mentioned electrical control device mounted therein, which communication ports function to realize data transmission between the electrical control device and the external processors such as lap-top, so that the working condition of the electrical control device can be controlled and detected. The collection diagnose box further can comprise a box body 541, a box lid 542 and a box lock, wherein the box body 541 is formed with an open opening. Particularly, the electrical control device can be vehicle control unit and/or engine ECU and/or drive assembly and/or display, so that it is possible to control the power component, electric devices, displays and engine selectively or in a uniform synchronous way. Correspondingly, communication ports 544 can be vehicle control unit communication port 5441 and/or display communication port 5442 and/or drive assembly communication port 5443 and/or engine ECU communication port 5444. The collection diagnose box is provided with a plurality of
158
2018233039 21 Sep 2018 communication ports for electrical control devices of the mining dump truck, wherein the electrical control devices can transfer signals to an external processor via the communication ports mounted in the same collection diagnose box so as to monitor or detect working conditions of the electrical control devices. A plurality of communication ports for various electrical control devices are fixed in the collection diagnose box as mounting structure, instead of being distributed at different locations on the dump truck, so that it is possible on one hand to facilitate collective management and adaption of respective communication port and on the other hand to optimize the overall layout of the data communication lines within the dump truck so as to avoid complicated wiring and tangle of multiple wires.
[00345] The dump truck auxiliary component comprises a hydro cooling assembly, a hydro-pump drive assembly 72, a hydro oil tank 73, a lamp assembly, an exhaust assembly75, a flat cable management assembly and a fire extinguishing assembly 77.
[00346] The lamp assembly comprises a taillight box, the exhaust assembly comprises a cooling air channel 751 and an intake manifold 752, and the flat cable management assembly comprises a wiring harness fixing assembly 761, a power cable fixing assembly 762 and a fixing arrangement for generator's damping strips and ring. The hydro-pump drive assembly comprises a working hydro-pump and a transmission shaft for connecting to the engine shaft of the dump truck and transferring the power from the engine shaft to the working hydro-pump. It further comprises a transfer box, the input port of which transfer box is connected to the transmission shaft and output port of which is connected to an input shaft of the working hydro-pump. The transfer box is a horizontal gear box with four output ports. The working hydro-pump comprises a lifting pump, a steering pump and a circulation pump, wherein the circulation pump and the steering pump are connected in series with the same output port to form a steering circulation duplex pump. The lifting pump is a duplex gear pump. The hydro-oil tank comprises a tank body, a cover plate, a separator and an extension plate, wherein the tank body is in form of box with a length and width larger than its height, and a removable cover plate is provided on the top of the box-shaped structure. The separator is located in the box-shaped structure, and the lifting assembly oil tank 735 is located in
159
2018233039 21 Sep 2018 front of the box-shaped structure with its both ends extending to the rear side of the box-shaped structure. The steering assembly is located at the rear side of the box-shaped structure with its central portion extending to the front side of the box-shaped structure. The extension plate is also provided in the tank body at a distance from the front wall of the box-shaped structure. An oil suction hole is provided on the bottom plate of the tank body, and the oil suction hole of the lifting assembly is provided on one side of the extension plate. The lifting assembly oil tank 735 is provided with an oil returning pipe of the lifting assembly, an oil returning opening of which is provided on the other side of the extension plate. The taillight box of the mining dump truck comprises a chamber receiving a reversing indication lamp and a viewing window, on which is provided a wiper and a nozzle, and a working break lamp, two reverse lamps, two steering break lamps and two IR lamps are included in the taillight box. The cooling air channel of the mining dump truck at both ends has an intake end 7511 and blowing end 7512. The cooling air channel is a cooling air channel of glass fiber reinforced plastics and is in fixed connection with a blowing opening of the fan of the mining dump truck via a square mounting frame. The cooling air channel further comprises a circular connection tube connected to its blowing end, which circular connection tube at one end is in sealing connection with the blowing end. The flowing-through area of the cooling air channel is decreased gradually from its intake end 7511 to its blowing end. This engine intake manifold is an intake manifold of glass fiber reinforced plastics. The automatic fire extinguishing assembly comprises a medium storage assembly 771 and an ejection device, wherein the medium storage assembly 771 comprises a group of dry powder tanks, nitrogen bottles and starters. The ejection device comprises a main pipe and branch pipes, each of the branch pipes is in connection with the main pipe and is provided with a nozzle at its end and located at respective protection location of the dump truck. The outlets of the dry powder tanks are in connection with the main pipe, and the starter can introduce nitrogen gas from the nitrogen gas bottles into the dry powder tanks when being started. The dry powder tanks and nitrogen gas bottles are arranged on a mounting support, and a five port joint is provided at the outlet of the dry powder tank for connecting with four main pipes. The electrical starter is provided on
160
2018233039 21 Sep 2018 the nitrogen gas bottle for controlling an alarm device and medium storage assembly
771.
[00347] The hydro cooling assembly comprises an oil tank 711, into which the hydro oil of the dump truck control assembly is returned. That is, hydro oil from oil return paths of respective actuator of the dump truck is returned to the oil tank 711, and stored in the oil tank 711 and fed in circulation to respective actuator. The hydro cooling assembly further comprises a cooling device and an oil pump, wherein a feeding path 712 and a discharging path 713 is connected between the cooling device and oil tank 711. As used herein, the feeding path 712 is meant to indicate an oil path feeding oil from the oil tank 711 to the cooling device, and the discharging path 713 is meant to indicate an oil path returning oil from the cooling device to the oil tank 711. Correspondingly, the gear oil pump is provided in the feeding path 712 for pumping the hydro oil in the oil tank 711 to the cooling device. The oil tank 711 of the hydro cooling assembly comprises a steering oil tank and a lifting oil tank, and the feeding path 712 of the cooling device comprises a first oil path 7121 and a second oil path 7122. The oil pump comprises a first oil pump
714 and a second oil pump 715, wherein the first oil pump and the second oil pump 714,
715 are provided in the first and second oil paths 7121, 7122, respectively. The first oil path 7121 is located between the steering oil tank and the cooling device, while the second oil path 7122 is located between the lifting oil tank and the cooling device. Further, the cooling device comprises a second oil pump 716 and a second cooling device 717, wherein the second oil pump 716 is connected to the first oil path 7121 and the second cooling device 717 is connected to the second oil path 7122, both of which cooling devices are connected to respective discharging path 713. The hydro cooling assembly further comprises a filter provided in the first oil path 7121. The hydro cooling assembly in this embodiment is an external circulation assembly. In this case, when the specific hydro cooling assembly is provided as external cooling device independently from the control assembly, the contact area of the hydro oil with external environment is increased so as to obtain better cooling effect to overcome the problem of cooling inefficiency in the prior dump truck and high oil temperature. The hydro cooling assembly takes oil directly from the oil tank 711 independently from the control
161
2018233039 21 Sep 2018 assembly, variation in oil volume of the discharging path of which does not affect the hydro cooling assembly, so that the cooling assembly possess stable and reliable cooling performance.
[00348] The hydro-pump drive assembly in this embodiment comprises a working hydro-pump 723 and a transmission shaft 722 for connecting with an engine shaft of the dump truck and transferring the power of the engine shaft to the working hydro-pump 723 to provide power for increasing the hydro oil pressure. It further comprises a transfer box 721 in form of horizontal gear box for distributing the engine power, wherein the transfer box 721 has an input port connected with the transmission shaft 722, and an output port connected with an input shaft of the working hydro-pump 723. The working hydro-pump 723 comprises a lifting pump 7231, a steering pump 7232 and a circulation pump 7233, wherein the circulation pump 7233 and the steering pump 7232 are connected in series with the same output port of the transfer box 721. The circulation pump 7233 is provided for feeing oil to an oil cooling circulation assembly, and the steering pump 7232 is provided for feeing oil to steering assembly of the dump truck, both pumps being connected in series with the same output port and forming in combination a steering circulation duplex pump. The lifting pump 7231 is a duplex gear pump. The transfer box 721 has four output ports 7211, and two lifting pumps 7231 and two steering circulation duplex pumps are provided. Two output ports 7211 of the transfer box 721 is in connection with two lifting pump 7231, and other two output ports 7211 of the transfer box 721 are in connection with two steering circulation duplex pumps. Serial connection of the transfer box and the transmission shaft enables respective working hydro-pump 723 to distribute around the transfer box collectively, and the hydro-pump drive assembly has a compact overall structure. Respective working hydro-pumps 723 are driven by different output ports 7211 of the transfer box, each of which can have a different speed ratio and at which power is obtained independently from the transmission shaft, so that a wider selection range of transmission capacity can be obtained by adjusting speed ratios. All the working hydro-pumps 723 are not connected in series any more, and the number of the working hydro-pumps 723 will not be limited by the stiffness of the through shaft and overall axial size any more, and
162
2018233039 21 Sep 2018 therefore a larger number of working hydro-pumps 723 can be provided to achieve the required flow, so that the contour size and output of one single hydro-pump is reduced, the service life of the hydro-pump is extended and the matching difficulty is reduced. [00349] As a preferable embodiment, the hydro oil tank comprises a tank body 731, a cover plate 732, a separator 733 and extension plates 734, wherein the tank body 731 is in form of box with a length and a width equal to or larger than four times of its height. A removable cover plate 732 is located on the top end of the box-shaped structure, which cover plate comprises at least two partial cover plates 7321, each of which is removably connected to the box-shaped structure independently. The hydro oil tank further comprises an oil suction hole, a plurality of oil suction holes 7351 for a lifting assembly and a plurality of oil suction holes 7361 for a steering assembly, wherein the oil suction holes 7351, 7361 are distributed symmetrically. A vertical separator 733 is provided in the box-shaped structure for separating the interior of the box-shaped structure into a lifting assembly oil tank 735 and a steering assembly oil tank 736 which are not in communication, so as to ensure said two oil tanks would not interfere with each other during operation. Further, the oil suction holes 7361 for the steering assembly oil tank 736 are provided at the rear side of the box-shaped structure, wherein the steering assembly oil tank 736 is further provided with a steering assembly oil return pipe 7362, an oil output of which is provided in the front side of the box-shaped structure. Extension plates 734 extending in the front to rear direction are provided on both ends within the lifting assembly oil tank 735, at a distance from the front wall of the box-shaped structure. The oil suction holes 7351 for the lifting assembly oil tank 735 are provided on one side of the extension plates 734, and the lifting assembly oil tank 735 is further provided with a lifting assembly oil return pipe 7352, an oil output of which is located on the other side of the extension plates 734. With such structure, the oil level during the lifting procedure of engineering machinery is varied less over the prior art due to the larger cross section of the oil tank than its height, so that in the same situation, it is possible to prevent the oil level from being dropped below the suction oil filter in the oil tank to avoid empty suction of the oil pump. Such flat box-shaped structure has a smaller height, i.e. a relatively small depth of received hydro oil. Because
163
2018233039 21 Sep 2018 the pressure is in direct proportion to the hydro oil depth, the hydro oil applies a less pressure to the internal wall of the oil tank at the lower end, so as to reduce the required strength for the hydro oil tank accordingly, and to reduce the manufacturing cost of the hydro oil tank. Because the cover plate 732 is removably mounted on the top end of the box-shaped structure, an operator can conduct operation like maintenance after removal of the cover plate 732, so that the cover plate 732 has a larger area and reasonable location in comparison with the prior art structure with small flanges mounted on the bottom side edge so as to enable the operator to have a larger operational space and for facilitating the service work.
[00350] The taillight box in this embodiment form a sealed chamber, together with the rear vehicle body of the dump truck, for receiving the reverse indication lamp of the dump truck, comprising a work break lamp 744, two reverse lamps 741, two direction indication lamps 742 and two IR lamps 743, wherein the reverse lamps 742, direction indication lamps 742 and IR lamps 743 are arranged symmetrically with respect to the travelling direction of the dump truck, while the work break lamp 744 is elongate and provided in the horizontal direction within the taillight box 74. The taillight box further comprises a viewing window 745 which is made of transparent materials for enable the reverse indication lamp to be watched properly through the viewing window 745. For facilitating the watching, the viewing window 745 typically faces to the rear side in the travelling direction of the dump truck. On an outer surface of the viewing window 745 of the taillight box is provided a wiper, and a wiper motor and a nozzle are provided within the taillight box, with a corresponding water tank and spraying motor therein. The viewing window 745 forms a chamber of the taillight box, together with a first lateral shell 746 and a second lateral shell 747, wherein an operation port 7461 is removably provided on the first lateral shell and is covered by a service cover 7462, and a loudspeaker mounting opening 7471 and a wiring opening 7472 for guiding the wires off the taillight box are provided on the second lateral shell 747. A rear view camera is provided in the chamber formed between the taillight box and the rear vehicle body of the dump truck, so that it is protected within the taillight box. In this embodiment, the reverse indication lamp is housed in the taillight box, so that the reverse indication lamp
164
2018233039 21 Sep 2018 is isolated by the taillight box from the outside on one hand so as to avoid being splashed with mud from the rear wheels and being covered or blurred for enhancing operational safety during reversing operation, and on the other hand, the viewing window is provided to ensure that the reverse indication lamp can be properly watched so as to precisely indicate reversing, direction changing and breaking states. In addition, the lateral plates are provided with operational openings for facilitating service work and manipulation of internal devices.
[00351] The cooling air channel of the mining dump truck in this embodiment at both end has an intake end 7511 and a blowing end 7512, wherein the is in connection with the blowing opening of the fan of the mining dump truck, and the blowing end 7512 is adjacent to the electrical control assembly for guiding the cooling air from the fan to the electrical control assembly to cool it down. The cooling air channel 751 is a cooling air channel of glass fiber reinforced plastics with a rectangular channel cross section and size of 482mmx212mm, wherein the air channel has a height of 1100mm and a wall thickness of 5mm. A square mounting frame 7513 is located on the outer wall at the intake end 7511 of the cooling air channel, both ends of which frame are in fixed sealing connection with the air channel intake end 7511 and the fan blowing end 7512. The cooling air channel 751 further comprises a circular connection pipe 7514 connected to its blowing end 7512, one end of which pipe 7514is in sealing connection with the blowing end 7512 and the other end is in connection with the electrical control assembly. The cooling air channel 751 has a cross section sectioned along a plane perpendicular to its axis or air flowing direction and reduced gradually from its intake end 7511 to the blowing end 7512, so that the blowing speed at the blowing end 7512 is substantially increased to accelerate the heat exchange and cooling process. Because the glass fiber reinforced plastics have a density equal to one fourth to one fifth of the density of steel, the glass fiber reinforced plastic cooling air channel has a mass substantially less than the prior art steel cooling air channel, so that the truck weight is reduced. In addition, the glass fiber reinforced plastic cooling air channel is impacted less when the mining dump truck bumps in a bad road condition, and the cracking of the weld seams can be avoided by omitting the welding of the glass fiber reinforced plastic
165
2018233039 21 Sep 2018 cooling air channel. The glass fiber reinforced plastic cooling air channel has a higher corrosion resistance so as to prevent rust failure during long term operation.
[00352] The dump truck engine intake pipe in this embodiment is formed by integral injection molding from glass fiber reinforced plastics, comprising a pipe body 7521 and a curved pipe 7522, wherein the pipe body 7521 has two ends, i.e. the first end 75211 and the second end 75212, to the first end 75211 of which one end of the curved pipe 7522 is connected. The pipe body 7521 is straight, i.e. it has a straight axis, and the curved pipe 7522 is an elbow, i.e. it has an arc-shaped, preferably minor arc shaped, axis. The curved pipe 7522 is butt joined to the first end 75211 of the pipe body 7521 at its one end that is the curved pipe 7522 has the same inner diameter as the pipe body 7521, and the axis of the curved pipe 7522 is located in the same plane as the axis of the pipe body 7521. A conical pipe at its one end with a smaller diameter is connected to a first air duct 75213, and a second air duct 75214 is connected to the other end of the curved pipe 7522, wherein the first and second air ducts 75213, 75214 are straight tubes. The first air duct 75213 has one end as blowing end 7512 which is not in connection with the conical pipe, and the second air duct 75214 has one end as intake end 7511 which is not in connection with the curved pipe 7522. With such intake pipe of above-mentioned structure, gas must be turned when passing through the curved pipe 7522 so as to prevent effectively dust from being entered in the intake pipe and to avoid abrasive damage to engine cylinders. The intake pipe of glass fiber reinforced plastics has a higher corrosion resistance to prevent rust failure during long term operation and thus to prevent rust crumbs from entering in the engine valve train via the intake pipe to cause server abrasion to the cylinders. The glass fiber reinforced plastics has smaller density and mass than steel, so that the intake pipe of glass fiber reinforced plastics has a smaller mass than the prior art steel intake pipe, resulting in corresponding weight reduction of the vehicle.
[00353] The wiring harness fixing assembly 761 is provided for confining relative movement between the end portions of the wiring harness and the joint so as to protect the wiring harness from breaking wire cores at the wire abutment position in the joint, and comprises a clamping portion 7611 and a fixing portion fixed to each other. The
166
2018233039 21 Sep 2018 clamping portion 7611 can clamp the harness so as to fix one side of harness adjacent to the joint to the wiring harness fixing assembly 761. The fixing portion can fixed to a rear axle box that is attached to the joint. The clamping portion 7611 is provided with many fixing holes 76111 for threading and fixing the harness, which fixing holes 76111 are arranged in sequence in the arranging direction of the harness. The clamping portion 7611 comprises an upper fixing element 76112 and a lower fixing element 76113 fixed to each other, wherein the upper fixing element 76112 and lower fixing element 76113 divide equally the fixing hole 76111 along the axis thereof. That is, the fixing hole 76111 is formed by joining one half of fixing hole 76111 in the upper fixing element 76112 and another half of fixing hole 76111 in the lower fixing element 76113. The fixing portion is a support 76121 fixed to the clamping portion, which has an end portion attached to the surface of the rear axle box. The support is a U-shaped support with a bottom end 761211 welded to the surface of the rectangular clamping portion 7611, so as to prevent effectively the interference of the U-shaped support to the harness. Two lateral supports 761212 are welded to the rear axle box at their ends, which lateral supports are fixed to a right-angled triangular support frame 761213, one leg of which support frame is fixed to a corresponding lateral support 761212, and the other leg of which is welded to the rear axle box. The wiring harness fixing assembly 761 is provided for confining the relative movement between the end portion of the wiring harness and the joint and comprises a clamping portion and a fixing portion fixed to each other, wherein the clamping portion clamps one side of the harness adjacent to the joint, and the fixing portion is fixed to the rear axle box that fixes the joint. With such configuration, the relative movement between the end portion of the wiring harness and the joint caused by vibration can be eliminated, so that wire cores at wire abutment portion in the joint are effectively protected so as to extend the service life of the wiring harness.
[00354] As a preferable variation of this embodiment, the power cable fixing assembly 762 is provided for fixing power cables of the electrical mining dump truck, comprising a fixing body 7621 which is provided with a plurality of retaining holes 76211, in this case retaining holes 76211 located in sequence along the longitudinal direction of the fixing body 7621, so that the power cable fixing assembly 762 is formed with a structure
167
2018233039 21 Sep 2018 of single layer of retaining holes 76211. The power cable fixing assembly 762 comprises a upper fixing portion and a lower fixing portion 76213 which separate respective retaining hole 76211 in a direction parallel to the axis of the retaining hole 76211, wherein the upper and lower fixing portions 76212, 76213 are butt joined to form the fixing body 7621, with the retaining holes 76211 provided separately on the upper and lower fixing portions 76212, 76213 simultaneously, so that the power cable is clamped in the retaining holes 76211 when the upper and lower fixing portions 76212, 76213 are butt joined, which upper and lower fixing portions divide equally respective retaining hole 76211. The upper and lower fixing portions 76212, 76213 are provided with connection holes 76214 which are joined and communicated, so that a fastener can be inserted through the upper and lower fixing portions 76212, 76213 to connect the upper and lower fixing portions 76212, 76213 reliably and stably. The upper and lower fixing portions 76212, 76213 can be connected by means of retaining groove and pin, wherein the retaining groove is provided on the end face of the lower fixing portion 76213 that is joined with the upper fixing portion 7612, while the retaining pin is protruded from the mating end surface of the upper fixing portion 7612. Each retaining hole 76211 has an opening expanded outward in form of trumpet, and a rubber washer is mounted at the edge of the opening of the retaining hole 76211 for reducing abrasion. The power cable fixing assembly 762 is snap connected on guide rails 7622 by C-shaped rail nut, which guide rails 7622 are welded to the vehicle frame to ensure firm connection. With the above-mentioned structure, power cables can be threaded through the retaining holes and fixed into the retaining holes of the power cable fixing assembly 762, so that each power cable can be attached to the power cable fixing assembly 762 in a simple, convenient and well defined way to improve the distribution state of the power cables on the vehicle frame, allowing service work on each power cable. In the mean time, each retaining hole is located in sequence along the longitudinal direction of the fixing body 7621. That is, the power cable fixing assembly 762 is only provided with a single layer of retaining holes so as to reduce the size of the power cable fixing assembly 762 to allow it to be mounted in a narrow space and enhance effectively the applicability of the power cable fixing assembly 762 by making full use of a larger longitudinal size and
168
2018233039 21 Sep 2018 also solve the problem of mounting power cables within a lower space with difficulty. [00355] The electrical generator 62 in this embodiment comprises a fixing structure for damping strips and a damping ring, comprising an end plate 7631, damping strips 7632 and a damping ring 7633, wherein many damping strips 7632 are mounted on the end plate 7631 in parallel. It further comprises a support block 7634 which at its one end is fixed to the end plate 7631 and at the other end support the damping ring 7633 so as to weld the damping ring 7633 to an end of respective damping strip 7632. Many damping strips 7632 are mounted in parallel on the end plate 7631, with one end of each damping strip 7632 connected to the damping ring 7633, wherein the damping ring 7633 is conducted with the damping strips 7632 respectively and is firstly supported by the support block 7634 and then welded to the damping strips 7632. The damping ring comprises a mounting opening, with which the other end of the support block as mounting end 76341 is engaged, e.g. by means of interference fit or transition fit. When the mounting hole is engaged in transition fit with the mounting end 76341, the damping ring 7633 and the support block 7634 can be tied by binding band to ensure that the damping ring 7633 is supported reliably by the support block 7634. At least two support blocks 7634 can be provided, each of which is mounted in parallel on the end plate7631 and below the damping strips 7632 to support jointly the damping ring 7633. With such fixing structure, the damping ring is supported by the support block and then be welded to the damping strips. In case of rotation of the damping ring and strips, the support block functions to support the damping ring and strips when the load outside the generator is vibrated, so as to prevent weld seams of the damping ring and strips from being broken and ensure the welding reliability and conduction of currents produced in respective damping strip with the damping ring, so that damping action is applied to the vibration to relief the impact on the generator’s windings and to enhance the generator operation reliability.
[00356] As a specific embodiment, the dump truck comprises an automatic fire extinguishing assembly, comprising a medium storage assembly 771 and an ejection device, wherein the medium storage assembly 771 includes a group of dry powder tank 7711, nitrogen gas bottle 7712 and starter 7713. The ejection device comprises a main
169
2018233039 21 Sep 2018 pipe and branch pipes, each of which branch pipes is in connection with the main pipe and is provided at its end with a nozzle and located at respective protection location of the dump truck respectively. The outlet of the dry powder tank 7711 is in connection with the main pipe, and nitrogen gas can be entered from the nitrogen gas bottle 7712 into the dry powder tank 7711 when the nitrogen gas bottle 7712 is actuated by the starter 7713. The dry powder tank 7711 and nitrogen gas bottle 7712 are mounted on a mounting support 7714 which has respective adjacent bases for matching with the dry powder tank 7711 or nitrogen gas bottle 7712. After mounting, the dry powder tank 7711 and nitrogen gas bottle 7712 are provided on a platform via said mounting support 7714, resulting in space saving on the platform. The starter 7713 is provided on the nitrogen gas bottle 7712 for actuating the nitrogen gas bottle 7712 at any time in a convenient way. The nitrogen gas bottle 7712 is further nested with a fixing frame 7715, a mounting end of which is connected with the dry powder tank 7711.
[00357] In case of fire on the dump truck, the starter 7713 of the automatic fire extinguishing assembly can be actuated manually or automatically, which starter 7713 in turn can actuate the nitrogen gas bottle 7712 so as to introduce the high pressure nitrogen gas in the nitrogen gas bottle 7712 into the dry powder tank 7711, wherein the outlet of the dry powder tank 7711 is in communication with the main pipe, and in this case, the dry powder in the dry powder tank 7711 is entered in the main pipe 1 under the action of the nitrogen gas and reached in respective protection location in the dump truck via respective branch pipes, so that the dry powder is ejected via nozzles to the protection location to extinguish the fire in the dump truck. The outlet of the dry powder tank 7711 is provided with a five pass joint, by means of which the outlet is in communication with four main pipes and which includes five connection ports. The outlet of the dry powder tank 7711 is in communication with one of the connection ports of the five pass joint, the other four of which are in connection with four main pipes respectively. Each main pipe controls a plurality of protection locations via branch pipes. The automatic fire extinguishing assembly adopts a collection storage method with a group of larger dry powder tank and nitrogen gas bottle, so that the dry powder is fed to respective protection location from one dry powder tank, and therefore it is
170
2018233039 21 Sep 2018 possible to occupy less space and save cost over the prior art. When the fire extinguishing assembly is actuated, the starter actuates the nitrogen gas bottle to introduce the high pressure nitrogen into the dry powder tank, so that the dry powder in the dry powder tank can be delivered to respective protection locations via the ejection device and ejected towards such protection location via nozzles simultaneously, with a better fire extinguishing effect.
[00358] It will be understood that the term “comprise” and any of its derivatives (eg comprises, comprising) as used in this specification is to be taken to be inclusive of features to which it refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.
[00359] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.
[00360] It will be appreciated by those skilled in the art that the invention is not restricted in its use to the particular application described. Neither is the present invention restricted in its preferred embodiment with regard to the particular elements and/or features described or depicted herein. It will be appreciated that various modifications can be made without departing from the principles of the invention. Therefore, the invention should be understood to include all such modifications in its scope.
171
2018233039 21 Sep 2018

Claims (20)

1. A mining dump truck, characterized by comprising: a frame assembly, a travel assembly, a cab assembly, a compartment assembly and a power-train, wherein the travel assembly, the cab assembly and the compartment assembly are arranged on the frame assembly, and the power-train provides power to the travel assembly;
wherein the mining dump truck is further characterized in that, the travel assembly comprises steering mechanisms, braking devices, a front axle, a rear axle and suspension cylinder mechanisms, and a rear axle casing member provided between electrical wheel pairs arranged at the rear axle;
wherein the mining dump truck is characterized in that the rear axle casing member comprises a rear axle housing and a suspension connecting member;
wherein the rear axle housing is connected to the frame assembly of the dump truck through the suspension connecting member; and the suspension connecting member comprises an upper suspension portion and a lower suspension portion; wherein the lower suspension portion comprises lower pull rods; the upper suspension portion comprises upper pull rods and rear suspension cylinders; and wherein the upper pull rod supporters comprise two pairs of vertical plates welded to the peripheral wall of the rear axle housing.
2. The mining truck of claim 1, wherein an external profile of the vertical plates comprises a top circular arc segment, a bottom circular arc segment and a smooth curve segment connecting right-most sides of the top and bottom circular arc segments.
3. The mining dump truck according to claim 1, characterized in that, the cab assembly and the compartment assembly are sequentially arranged on the frame assembly, and the travel assembly, a hydraulic-electronic control system and a drive assembly are respectively arranged on the frame assembly via respective functional components.
4. The mining dump truck according to claim 3, characterized in that, the frame assembly comprises a main frame, wherein the main frame is integrally formed by
172
2018233039 21 Sep 2018 lateral ridges arranged in pairs and a plurality of transverse beams sequentially arranged between the lateral ridges pairs, and a bumper is arranged on top end of the main frame and is integrated with the main frame.
5. The mining dump truck according to claim 4, characterized in that, the transverse beams include a first transverse beam, a second transverse beam, a third transverse beam and a fourth transverse beam.
6. The mining dump truck according to claim 5, characterized in that, the first transverse beam acts as a connecting and supporting part between the cab assembly and the frame assembly; the second transverse beam acts as a connecting and supporting part between the travel assembly and the frame assembly; the third and fourth transverse beams act as connecting and supporting parts between the compartment assembly and the frame assembly.
7. The mining dump truck according to claim 4, characterized in that the bumper is of box-type structure.
8. The mining dump truck according to claim 1, characterized in that, the travel assembly comprises steering mechanisms, braking devices, a front axle, a rear axle and suspension cylinder mechanisms, wherein the front axle, the rear axle, the suspension cylinder mechanisms, the braking devices and the steering mechanism are respectively and independently connected with the frame assembly; the steering mechanism is arranged within the front axle; the braking devices are respectively arranged at the front and rear axles; the suspension cylinder mechanisms are respectively arranged at the front and rear axles; and a pair of electrical wheels are arranged at the rear axle.
9. The mining dump truck according to claim 1, characterized in that, the frame assembly further comprises a rear axle connecting member, wherein the rear axle connecting member comprises a pair of connection lug supports and connection beams, and the connection beams connect the connection lug supports pair.
10. The mining dump truck according to claim 9, characterized in that enforcement plates are welded around the connection lug supports pair.
11. The mining dump truck according to claim 1, characterized in that a synchronous
173
2018233039 21 Sep 2018 steering connecting rod of the steering mechanism of the dump truck is located directly below the main frame.
12. The mining dump truck according to claim 1, characterized in that a suspension cylinder mechanism is divided into a front suspension cylinder component and a rear suspension cylinder component which are respectively arranged at the front and rear axles and are configured to support the front and rear axles respectively from the frame assembly.
13. The mining dump truck according to claim 5, characterized in that, the front suspension cylinder component comprises a suspension cylinder, a first transverse arm and a second transverse arm; a top end of the suspension cylinder and the frame of the mining dump truck are capable of rotating leftwards or rightwards and swinging upwards or downwards; a bottom end of the suspension cylinder and a top end of the first transverse arm are capable of rotating leftwards or rightwards and swinging upwards or downwards.
14. The mining dump truck according to claim 5, characterized in that an external end of the first transverse arm and an upper end of a front wheel shaft of the dump truck are capable of rotating leftwards or rightwards and swinging upwards or downwards; an external end of the second transverse arm and a lower end of the front wheel shaft are capable of rotating leftwards or rightwards and swinging upwards or downwards; an internal end of the first transverse arm and that of the second transverse arm are connected with the frame.
15. The mining dump truck according to claim 5, characterized in that an external end of the first transverse arm and an upper end of the front wheel shaft are hinged by a ball pin.
16. The mining dump truck according to claim 5, characterized in that an external end of the second transverse arm and a lower end of the front wheel shaft are connected by a first joint bearing.
17. The mining dump truck according to claim 5, characterized in that a bottom end of the suspension cylinder and an external end of the first transverse arm are connected by a second joint bearing.
174
2018233039 21 Sep 2018
18. The mining dump truck according to claim 5, characterized in that a top end of the suspension cylinder and the frame assembly are connected by a third joint bearing.
19. The mining dump truck according to claim 5, characterized in that the first and the second transverse beams are not equal in length.
20. The mining dump truck according to claim 15, characterized in that, the ball pin comprises a ball pin body, a ball seat and a gland; wherein one end of the ball pin body is provided with a ball head, the other end thereof is provided with screw threads; and wherein the ball seat is provided with a first arcuate surface which fits with a top portion of the ball head; and wherein the gland is provided with a through hole whose inner side wall is a second arcuate surface which fits with a bottom portion of the ball head, and a connecting structure is arranged at a periphery of the gland to connect with the first transverse arm thereby fixing the ball head in the first transverse arm.
AU2018233039A 2015-08-04 2018-09-21 A mining dump truck Active AU2018233039B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2018233039A AU2018233039B2 (en) 2015-08-04 2018-09-21 A mining dump truck

Applications Claiming Priority (98)

Application Number Priority Date Filing Date Title
CN201520579171.4U CN204937277U (en) 2015-08-04 2015-08-04 A kind of quarry tipper and cab framework thereof
CNCN201510470439.5 2015-08-04
CNCN201520577224.9 2015-08-04
CN201520578724.4U CN204937218U (en) 2015-08-04 2015-08-04 A kind of quarry tipper and top rod crossbeam thereof
CNCN201520579078.3 2015-08-04
CNCN201520579172.9 2015-08-04
CNCN201520578298.4 2015-08-04
CN201520578299.9U CN204937276U (en) 2015-08-04 2015-08-04 Quarry tipper and operator's compartment thereof, and bottom plate of driving cab
CNCN201520578299.9 2015-08-04
CN201520578318.8U CN204936851U (en) 2015-08-04 2015-08-04 A kind of mine electric wheel dump
CN201510470439.5A CN104999873A (en) 2015-08-04 2015-08-04 Large mining dump vehicle and rear axle suspension system thereof
CN201520579058.6U CN204936826U (en) 2015-08-04 2015-08-04 A kind of electric power wheel self-discharging vehicle and hydraulic pump drive system thereof
CNCN201520578775.7 2015-08-04
CN201520578298.4U CN204937007U (en) 2015-08-04 2015-08-04 A kind of quarry tipper and concentrated diagnosis box thereof
CNCN201520578724.4 2015-08-04
CNCN201520579171.4 2015-08-04
CNCN201520579058.6 2015-08-04
CNCN201520578668.4 2015-08-04
CNCN201520578864.1 2015-08-04
CN201520578864.1U CN204936834U (en) 2015-08-04 2015-08-04 A kind of quarry tipper and hydraulic valve electric interlocking thereof
CNCN201520578318.8 2015-08-04
CN201520579078.3U CN204936905U (en) 2015-08-04 2015-08-04 A kind of electric power wheel self-discharging vehicle and lifting hydraulic efficiency gear thereof
CN201520579060.3U CN204936941U (en) 2015-08-04 2015-08-04 A kind of quarry tipper and taillight case thereof
CN201520578297.XU CN204942160U (en) 2015-08-04 2015-08-04 A kind of electric power wheel self-discharging vehicle and hydraulic cooling system thereof
CN201520578668.4U CN204941114U (en) 2015-08-04 2015-08-04 A kind of quarry tipper, back axle and access cover snap close thereof
CN201520578775.7U CN204936970U (en) 2015-08-04 2015-08-04 Quarry tipper and maintenance ladder thereof
CNCN201520579060.3 2015-08-04
CN201520577224.9U CN205185729U (en) 2015-08-04 2015-08-04 Mining dump truck , rear axle and rear -axle housing anticollision piece thereof
CN201520579172.9U CN204936731U (en) 2015-08-04 2015-08-04 A kind of large-scale mine dumping car and back axle suspension system thereof
CNCN201520578297.X 2015-08-04
CN201520583574.6U CN204942115U (en) 2015-08-05 2015-08-05 A kind of engineering machinery and hydraulic oil container thereof
CN201520582888.4U CN204937008U (en) 2015-08-05 2015-08-05 A kind of dumping car and regulator cubicle thereof
CN201520583266.3U CN204937010U (en) 2015-08-05 2015-08-05 Electronic quarry tipper and power cable anchor fitting thereof
CNCN201520583339.9 2015-08-05
CN201520582559.XU CN204941326U (en) 2015-08-05 2015-08-05 A kind of highway car and flexible ladder thereof
CN201520582889.9U CN204936840U (en) 2015-08-05 2015-08-05 Quarry tipper and bridge column thereof
CN201520582560.2U CN204936908U (en) 2015-08-05 2015-08-05 The side plate in a kind of quarry tipper and compartment thereof
CNCN201520583056.4 2015-08-05
CN201520583339.9U CN204936909U (en) 2015-08-05 2015-08-05 Quarry tipper and platform supporting device thereof
CNCN201520583558.7 2015-08-05
CNCN201520583200.4 2015-08-05
CN201520582932.1U CN204936730U (en) 2015-08-05 2015-08-05 A kind of quarry tipper and front suspension thereof
CNCN201520582560.2 2015-08-05
CNCN201520583298.3 2015-08-05
CN201520582970.7U CN204937138U (en) 2015-08-05 2015-08-05 A kind of quarry tipper
CN201520583321.9U CN204936843U (en) 2015-08-05 2015-08-05 Quarry tipper and operator's compartment operation bench thereof
CNCN201520582888.4 2015-08-05
CN201520583056.4U CN204937009U (en) 2015-08-05 2015-08-05 Quarry tipper and wire harness fixing device thereof
CNCN201520583635.9 2015-08-05
CNCN201520583574.6 2015-08-05
CNCN201520583266.3 2015-08-05
CNCN201520582559.X 2015-08-05
CNCN201520582970.7 2015-08-05
CNCN201520583612.8 2015-08-05
CNCN201520582932.1 2015-08-05
CN201520583200.4U CN204932674U (en) 2015-08-05 2015-08-05 A kind of dumper and automatic fire extinguishing system thereof
CN201520583298.3U CN204943003U (en) 2015-08-05 2015-08-05 Quarry tipper and dry oil lubrication station control gear thereof
CN201520583558.7U CN204937024U (en) 2015-08-05 2015-08-05 A kind of quarry tipper and bumper/spoiler thereof
CNCN201520582889.9 2015-08-05
CNCN201520583321.9 2015-08-05
CN201520583635.9U CN204947765U (en) 2015-08-05 2015-08-05 The fixed structure of a kind of generator and amortisseur bar and damping ring
CN201520583612.8U CN204936702U (en) 2015-08-05 2015-08-05 Quarry tipper and front wheel spindle thereof
CN201520586276.2U CN205185941U (en) 2015-08-06 2015-08-06 Mining dump truck and carriage thereof
CNCN201520586276.2 2015-08-06
CNCN201520586135.0 2015-08-06
CNCN201520586196.7 2015-08-06
CN201520586567.1U CN204936706U (en) 2015-08-06 2015-08-06 A kind of quarry tipper and rear-axle casing thereof
CN201520586581.1U CN204936811U (en) 2015-08-06 2015-08-06 A kind of quarry tipper, fuel tank and washboard thereof
CNCN201520587366.3 2015-08-06
CNCN201520586621.2 2015-08-06
CN201520586200.XU CN204941745U (en) 2015-08-06 2015-08-06 Automobile, motor and suction tude thereof
CN201520586853.8U CN204936694U (en) 2015-08-06 2015-08-06 Mining dump truck with electric wheels tire and rim structure thereof
CNCN201520586200.X 2015-08-06
CN201520586134.6U CN204936742U (en) 2015-08-06 2015-08-06 A kind of dumping car and front overhang cylinder thereof
CN201520587696.2U CN204936799U (en) 2015-08-06 2015-08-06 Quarry tipper and cooling air channel thereof
CNCN201520586581.1 2015-08-06
CNCN201520586567.1 2015-08-06
CNCN201520587696.2 2015-08-06
CN201520587366.3U CN204937220U (en) 2015-08-06 2015-08-06 A kind of quarry tipper and tierod assembly thereof
CN201520586612.3U CN204947746U (en) 2015-08-06 2015-08-06 Motor and stator thereof
CNCN201520586612.3 2015-08-06
CNCN201520586528.1 2015-08-06
CN201520586540.2U CN204937232U (en) 2015-08-06 2015-08-06 The erecting device of a kind of quarry tipper and platform and support
CN201520586528.1U CN204936732U (en) 2015-08-06 2015-08-06 A kind of double wishbone suspension and ball end thereof
CNCN201510476037.6 2015-08-06
CNCN201520586134.6 2015-08-06
CN201510476037.6A CN105015329B (en) 2015-08-06 2015-08-06 A kind of quarry tipper, fuel tank and its swash plate
CNCN201520586540.2 2015-08-06
CN201520586621.2U CN204941664U (en) 2015-08-06 2015-08-06 Automobile, motor and vent systems thereof
CN201520586135.0U CN204936904U (en) 2015-08-06 2015-08-06 A kind of quarry tipper and lifting support thereof
CN201520586196.7U CN204936910U (en) 2015-08-06 2015-08-06 A kind of quarry tipper and panel sheeting thereof
CN201520586457.5U CN204937219U (en) 2015-08-06 2015-08-06 A kind of quarry tipper and top rod bearing thereof
CNCN201520586853.8 2015-08-06
CNCN201520586457.5 2015-08-06
CNCN201610597062.4 2016-07-26
CN201610597062 2016-07-26
AU2016210703A AU2016210703A1 (en) 2015-08-04 2016-08-04 Mining dump truck
AU2018233039A AU2018233039B2 (en) 2015-08-04 2018-09-21 A mining dump truck

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU2016210703A Division AU2016210703A1 (en) 2015-08-04 2016-08-04 Mining dump truck

Publications (2)

Publication Number Publication Date
AU2018233039A1 AU2018233039A1 (en) 2018-10-11
AU2018233039B2 true AU2018233039B2 (en) 2019-06-20

Family

ID=58046296

Family Applications (2)

Application Number Title Priority Date Filing Date
AU2016210703A Abandoned AU2016210703A1 (en) 2015-08-04 2016-08-04 Mining dump truck
AU2018233039A Active AU2018233039B2 (en) 2015-08-04 2018-09-21 A mining dump truck

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU2016210703A Abandoned AU2016210703A1 (en) 2015-08-04 2016-08-04 Mining dump truck

Country Status (1)

Country Link
AU (2) AU2016210703A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108529405A (en) * 2018-06-07 2018-09-14 林肯电梯(中国)有限公司 A kind of car door emergency unlocking device using torsionspring
CN110182498B (en) * 2019-06-25 2024-01-05 上海中荷环保有限公司 Frame for vertical box body and transport vehicle
CN114013286B (en) * 2021-11-26 2023-08-15 中车大连机车车辆有限公司 Roof integrated high-voltage system of electric locomotive
CN116160998B (en) * 2022-12-26 2023-06-20 太原重工股份有限公司 Mine dump truck with stone discharging function for off-highway and use method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531781A (en) * 1983-03-14 1985-07-30 Wiseda Ltd. Off-highway dump truck
US5333895A (en) * 1991-12-11 1994-08-02 Terex Corporation Dual rear axle system for large vehicles
CN202156238U (en) * 2011-07-14 2012-03-07 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 Rear-axle welding assembly structure for electric-wheel mine dump truck
CN203780245U (en) * 2014-04-19 2014-08-20 吉林大学 Four link type independent rear suspension for mine truck
CN204263849U (en) * 2014-11-17 2015-04-15 湘电重型装备有限公司 A kind of rear axle housing for electric-wheel dump truck assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531781A (en) * 1983-03-14 1985-07-30 Wiseda Ltd. Off-highway dump truck
US5333895A (en) * 1991-12-11 1994-08-02 Terex Corporation Dual rear axle system for large vehicles
CN202156238U (en) * 2011-07-14 2012-03-07 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 Rear-axle welding assembly structure for electric-wheel mine dump truck
CN203780245U (en) * 2014-04-19 2014-08-20 吉林大学 Four link type independent rear suspension for mine truck
CN204263849U (en) * 2014-11-17 2015-04-15 湘电重型装备有限公司 A kind of rear axle housing for electric-wheel dump truck assembly

Also Published As

Publication number Publication date
AU2018233039A1 (en) 2018-10-11
AU2016210703A1 (en) 2017-02-23

Similar Documents

Publication Publication Date Title
AU2018233039B2 (en) A mining dump truck
US20200298912A1 (en) Vehicle System
CN104786803A (en) High driving range all-electric logistics vehicle structure
AU2016101742A4 (en) A travel drive device of a mining dump truck
CN108128312B (en) Track train
US20230174000A1 (en) Concrete mixer vehicle with chute storage assembly
CN115284862A (en) Locking mechanism and vehicle
CN204659426U (en) The pure electronic logistic car structural arrangement of high continual mileage
CN218300074U (en) Locking mechanism and vehicle
CN104163207A (en) Vehicle body floor assembly for vehicle and vehicle with same
CN218228616U (en) Supporting beam assembly, lateral connecting device and vehicle
CN218039648U (en) Battery frame and vehicle
CN217892496U (en) Lateral connecting mechanism and vehicle
CN217892497U (en) Frame subassembly, vehicle and trade power station
CN218021192U (en) Locking mechanism and vehicle
WO2023050192A1 (en) All-terrain vehicle
CN112795733B (en) Induction heating type normalizing machine
CN112795732B (en) Normalizing machine
EP4253120A1 (en) Off-road vehicle
CN211918653U (en) Rail working vehicle and rail field operation assembly
US20240133149A1 (en) Material Handling Machine
CN206914273U (en) A kind of multi-functional pure electronic cargo vehicle electric component erecting device
GB2322339A (en) Plastics superstructure members for an industrial tractor.
JP2023006070A (en) Support device for vehicle battery pack
CN205740197U (en) A kind of electrocar

Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)