CN113879353A - Compact primary suspension bogie for track-bound engineering machinery - Google Patents

Abstract

The bogie comprises a framework, wherein the framework mainly comprises two side beams and a cross beam, wheel-set axle box positioning devices are arranged at two ends of the framework, each wheel-set axle box positioning device comprises a wheel set, axle boxes are symmetrically arranged on axles on the inner sides of wheels of the wheel set, the rear ends of the axle box assemblies are elastically connected with the side beams through the compact primary suspension, and the front ends of the axle box assemblies are connected with the side beams through primary positioning; the middle upper part of the side beam is provided with a secondary suspension device, the middle upper part of the cross beam is provided with a compact central pin traction device, the outer sides of the two side beams are provided with a foundation brake device, and driving devices are arranged between the two side beams and on the two sides of the cross beam. The invention solves the technical problems that the traditional bogie is difficult to pass through a curve with a smaller radius and a limit, the wheel track abrasion is large, and the whole life cycle cost is high, and simultaneously, the whole mass and the unsprung mass of the bogie are reduced through the light weight design, the dynamic performance of the bogie is effectively improved, and the production and manufacturing cost is reduced.

Description

Compact primary suspension bogie for track-bound engineering machinery

Technical Field

The invention belongs to the technical field of bogies, and particularly relates to a compact primary suspension bogie device for track engineering machinery.

Background

With the rapid development of railway industry in China, the research and application technology of rail-mounted machinery for building matching service for railway facilities is gradually improved. On the premise of meeting railway operation requirements, the rail engineering vehicle also needs to meet increasingly severe requirements in the aspects of complex line conditions (small curves and small limits), low full-life cycle cost (wheel rail abrasion and energy consumption), better application performance and the like. The bogie has the following functions as a running part of the railway engineering vehicle: 1. bearing the load of each part above the frame; 2. the traction force is ensured to be generated by the adhesion between the wheel rails; 3. the running stability and stability of the vehicle are improved; 4. ensuring that the vehicle stops within a specified distance; 5. the curve passing of the vehicle is ensured. The quality of the structure performance of the bogie directly influences the traction braking performance, the running quality, the running safety and the like of the railway engineering vehicle.

The traditional bogie for the rail engineering vehicle adopts an axle box external suspension mode (namely, framework side beams and an axle box positioning device are arranged on the outer side of wheels), the wheel set interval is wider, the layout of the framework auxiliary mechanisms such as an external axle box and a gear box cannot be further compressed and compacted, further, the overall structure of the bogie is large in occupied space, large in turning radius, heavy in mass and high in mass center, the minimum curve passing radius of the bogie is at least 100 meters, in addition, in order to ensure the structural strength of a welding framework, the bogie framework needs to be welded by a thicker steel plate, the axial span of two side beams is at least 1800 millimeters, the existing index parameters ensure that the traditional framework with the external axle box has larger mass and large size, the minimum curve radius cannot be further reduced, the design requirement of a novel railway line cannot be met, and the fatigue strength of a welding seam of the bogie inevitably decreases gradually along with the passage of time, even leading to cracks on the key welding seams of the framework, and being not beneficial to driving safety. Meanwhile, the bogie occupies a large space, so that the vehicle cannot pass through smaller vehicle limits (such as special small limits in the cloud and precious region and southeast Asia country in China).

In addition, the traditional swing-arm type primary suspension device for the railway vehicle has two common arrangement modes, wherein the mode 1 is that a steel spring group is arranged between the top of an axle box and a framework, a vertical shock absorber is arranged at the tail of the axle box (called a spring top-mounted mode for short), the mode 2 is that the steel spring group is arranged between the tail of the axle box and the framework, and the vertical shock absorber is arranged behind the steel spring (called a spring tail-mounted mode for short).

The two arrangement modes of the primary suspension device have the following defects:

the primary suspension device with the top spring has limited vertical space, so that the primary steel spring is difficult to design into large static deflection, and the dynamic performance of the vehicle is influenced.

The spring tail-mounted primary suspension device has the advantages that the suspension point of the spring is reduced to be below the central line of the axle, the design problem of the spring top-mounted primary suspension is solved, the tail-mounted steel spring occupies the longitudinal space of the bogie, so that the length of the bogie frame is prolonged, the weight is increased, and meanwhile, due to the increase of the longitudinal overall size of the bogie, the arrangement space of other equipment under the vehicle is insufficient, and the overall spatial arrangement of the vehicle is influenced.

In view of the foregoing, there is a need for improvement.

Disclosure of Invention

The technical problems solved by the invention are as follows: the invention provides a compact primary suspension bogie for a rail engineering machine, which solves the technical problems that the conventional bogie for an engineering vehicle is difficult to pass through a curve and a limit with a smaller radius, the abrasion of a wheel rail is large, and the cost of the whole life cycle is high.

The technical scheme adopted by the invention is as follows: the bogie comprises a framework, wherein the framework is mainly an H-shaped integral welding structure consisting of two side beams and a cross beam with box-shaped beam structures at the cross sections, wheel-set axle box positioning devices are arranged at two ends of the framework and comprise wheel sets, axle boxes are symmetrically arranged on axles on the inner sides of wheels of the wheel sets, the rear ends of the axle box assemblies arranged on the outer sides of the axles are elastically connected with the corresponding ends of the side beams of the framework through compact primary suspension, and the front ends of the axle box assemblies arranged on the inner sides of the axles are connected with the side beams of the framework through primary positioning; the middle upper parts of the side beams are provided with secondary suspension devices, the middle upper parts of the cross beams are provided with compact center pin traction devices, the outer sides of the two side beams are provided with foundation brake devices, and driving devices are arranged between the two side beams and on two sides of the cross beam.

As a further limitation of the technical scheme, the compact primary suspension comprises a spiral steel spring, a primary vertical shock absorber and a rubber pad, the rubber pad is arranged on a spring seat formed by an axle box, the spiral steel spring is arranged between the rubber pad and a side beam, the linear surface of the end part of the side beam is provided with the primary spring seat for mounting the spiral steel spring, the primary vertical shock absorber penetrates through the inner space of the spiral steel spring, the lower end of the primary vertical shock absorber is connected with the axle box through a fastener, the upper end of the primary vertical shock absorber is connected with a vertical shock absorber seat, and the vertical shock absorber seat is connected with the side beam through a fastener.

As a further limitation of the technical scheme, a side beam rectangular window I which penetrates through vertical plates on two sides of the side beam and is convenient for mounting a vertical shock absorber is arranged at the end part of the side beam, a side beam rectangular window II and a side beam rectangular window III which penetrate through an upper cover plate and a lower cover plate of the side beam and a spring seat, and the side beam rectangular window I is covered by a blocking plate.

As a further limitation of the above technical solution, the secondary suspension device includes 4 secondary rubber piles and 2 transverse dampers, a secondary rubber pile base is disposed on the upper surface of the middle of the side beam, a transverse damper base is disposed on the upper surface of the cross beam, the secondary rubber piles are mounted on the secondary rubber pile base through bolts, and the transverse dampers are mounted on the transverse damper base.

As a further limitation of the technical scheme, the compact center pin traction device comprises a center pin, a nylon bush, a center pin sleeve, a supporting plate and a traction baffle plate, wherein a cross beam rectangular window for installing the compact center pin traction device is arranged in the middle of a cross beam, a traction baffle seat is arranged on the transverse inner side wall of the cross beam rectangular window, a transverse stop is arranged on the longitudinal inner side wall of the cross beam rectangular window, the center pin is connected to a center pin seat plate of a vehicle body underframe in a welding mode, the nylon bush is installed on the center pin through small clearance fit between a cylindrical inner hole of the nylon bush and the outer surface of the cylindrical traction pin of the center pin, the center pin sleeve is installed on the nylon bush through small clearance fit between the cylindrical inner hole of the center pin and the cylindrical outer surface of the nylon bush, the supporting plate is installed on a plane at the bottom of the center pin through a fastener, and plays a limiting role for the nylon bush and the center pin sleeve, the other function of the supporting plate is that when the whole vehicle is lifted, the supporting plate rises along with the whole vehicle and then contacts with a cross beam of the framework to support the framework, the function of binderless lifting between the vehicle body and the bogie is realized, the traction baffle plate is arranged on the traction baffle plate seat through a fastener, and the gap between the traction baffle plate and the central pin sleeve is adjusted by adding an adjusting pad behind the traction baffle plate, so that the functions of gapless traction and braking are realized.

As a further limitation of the above technical solution, the foundation brake device includes two unit brakes i and two unit brakes ii, the foundation brake device is arranged outside the two side beams in an outside arrangement manner, and the outside surfaces of the two side beams are both provided with unit brake mounting seats; the two unit brakes I have parking brake functions, the two unit brakes II do not have parking brake functions, and the unit brakes I adopt vertical parking cylinders.

As the further limitation of the technical scheme, the driving device comprises a secondary gear box arranged on a first-end axle gear box seat of the bogie, a first-stage gear box arranged on a second-end axle gear box seat of the bogie and a transmission shaft between the two gear boxes, wherein the first-stage gear box and the second-stage gear box are connected with the framework through a pull arm assembly, and a pull arm seat is arranged on a beam of the framework.

Compared with the prior art, the invention has the advantages that:

1. according to the invention, an axle box inner side suspension mode is adopted, the bearing point, namely the axle box device, is positioned at the inner side of the wheel, the transverse span of a primary suspension point is only 1034mm, the axle bending moment caused by load and the axle bending moment caused by the wheel rail transverse force can be mutually offset, the axle bending moment is effectively reduced, and therefore, the wheel rail abrasion is reduced;

2. the invention reduces the rigidity of the wheel pair pan angle and the torsional rigidity of the bogie by reducing the fixed wheelbase and the smaller span of the side beam, thereby improving the curve passing capacity of the bogie;

3. the axle box composition and the frame side beam are internally arranged, so that the axle length and the beam length are reduced, the axle box width and the fixed wheelbase are reduced through a compact design, and the length of the side beam is further reduced, so that the overall mass of the bogie is greatly reduced compared with that of a conventional engineering truck, and the weight of the bogie is reduced by 20-30%;

4. due to the reduction of the mass of the wheel set, compared with the traditional engineering truck bogie, the unsprung mass of the bogie is greatly reduced, and the bogie has good small curve passing performance and dynamic performance;

5. the invention provides an innovative idea of coupling arrangement of a primary vertical shock absorber and a suspension spring, wherein the primary vertical shock absorber is arranged in the internal space of a spiral steel spring, so that the overall length of a bogie and a framework is reduced, the space is saved for the installation of equipment under a vehicle, and the primary suspension device reduces the length of a side beam of the framework and the length of an axle box body, so that the overall quality of the bogie is reduced, and the lightweight design is realized compared with the traditional primary suspension device;

6. the invention adopts a central pin bush traction mode, provides a traction function by the direct contact of the central pin bush and the framework traction baffle plate in the longitudinal direction of the vehicle, realizes a transverse elastic stop function by the transverse elastic contact between the central pin bush and the framework, saves traction beams, traction pull rods, transverse stops and other parts in the traditional bogie, and reduces the manufacturing cost of the bogie;

7. compared with the traditional engineering truck bogie, the bogie has the advantages that the vehicle application cost is saved through the performance performances of reducing weight, reducing wheel rail abrasion and the like, and the bogie has higher economy;

8. according to the invention, through the modular design of internal parts, the serialized design of parameters (such as secondary suspension rigidity, basic braking multiplying power, gear box transmission ratio and the like) influencing vehicle functions is realized on the premise of keeping the interface and the external dimension unchanged, so that the bogie can adapt to the application requirements of various engineering vehicles, and the applicability of the bogie is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the bogie of the present invention;

FIG. 2 is a schematic perspective view of a truck frame according to the present invention;

FIG. 3 is a schematic perspective view of a positioning device for a wheel-axle box in a bogie according to the present invention;

FIG. 4 is a schematic view of a compact primary suspension mounted on a frame for a three-dimensional explosive structure of the bogie of the present invention;

FIG. 5 is a schematic cross-sectional view of a compact primary suspension in the truck of the present invention;

FIG. 6 is a schematic perspective view of a rectangular window partially formed in the frame of the truck of the present invention;

FIG. 7 is a schematic bottom perspective view of a rectangular window partially defining a frame of the truck of the present invention;

FIG. 8 is a schematic perspective view of a secondary suspension system of the bogie of the present invention;

FIG. 9 is a schematic perspective view of a compact kingpin retractor of the present invention;

FIG. 10 is a schematic perspective view of a foundation brake assembly of the truck of the present invention;

fig. 11 is a schematic perspective view of a driving device in the bogie of the present invention.

The serial numbers and corresponding names in the drawings:

1. a frame; 2. wheel set axle box positioning device; 3. a secondary suspension device; 4. a compact kingpin traction device; 5. a foundation brake device; 6. a drive device;

1-1, side beam; 1-1-1, a side beam rectangular window I; 1-1-2, a side beam rectangular window II; 1-1-3, side beam rectangular window III;

1-2. a cross beam; 1-2-1. a beam rectangular window;

1-3, a transverse shock absorber seat; 1-4. a secondary rubber stacking base; 1-5, a series of spring seats; 1-6, a pull arm seat; 1-7, transverse stopping; 1-8. unit brake mounting seat; 1-9, drawing baffle seat; 1-10, a rotating arm node seat;

2-1, wheel pair; 2-2, compact primary suspension; 2-2-1. a spiral steel spring; 2-2-2. a series of vertical shock absorbers; 2-2-3, a vertical shock absorber seat; 2-2-4, a rubber pad; 2-2-5. a blocking plate;

2-3. axle box; 2-4, positioning;

3-1. secondary rubber pile rubber; 3-2. transverse vibration absorber;

4-1, a center pin; 4-2. nylon bush; 4-3, a central pin sleeve; 4-4. a supporting plate; 4-5 traction baffle

5-1, a unit brake I; 5-2 unit brake II;

6-1, a first-stage gear box; 6-2 pull arms; 6-3. a transmission shaft; 6-4. two-stage gear box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements" does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Referring to fig. 1-11, embodiments of the present invention are described in detail.

A compact primary suspension bogie for track engineering machinery is shown in figures 1 and 2 and comprises a framework 1, wherein the framework 1 is used as a bearing main body and is an H-shaped integral welding structure formed by splicing and welding two side beams 1-1 and cross beams 1-2 with box-shaped beam structures, and the side beams 1-1 adopt a fish belly structure with a concave middle part to improve the inner space of a vehicle.

As shown in fig. 3, wheel-set axle-box positioning devices 2 are disposed at two ends of the frame 1, the wheel-set axle-box positioning devices 2 include wheel sets 2-1, the wheel sets 2-1 are composed of axles and wheels symmetrically disposed at two ends of the axles, axle-box assemblies 2-3 are symmetrically disposed on the axles inside the wheels of the wheel sets 2-1, rear ends of the axle-box assemblies 2-3 disposed outside the axles are elastically connected with corresponding ends of the side beams 1-1 of the frame 1 through compact primary suspensions 2-2, front ends of the axle-box assemblies 2-3 disposed inside the axles are connected with the side beams 1-1 of the frame 1 through primary positioners 2-4, and rocker arm node bases 1-10 for mounting the primary positioners 2-4 are disposed below the side beams 1-1.

In the structure, because the axle bearing seats of the wheel sets 2-1 are arranged on the inner sides of the wheels, the length of the axle is greatly shortened, and the quality of the axle is reduced. The wheels are symmetrically arranged at two ends of the axle, so that the distance between the inner sides of the wheel pairs is 1353 mm.

In order to facilitate installation, the bearings of the axle box assemblies 2-3 are products with large inner diameters and are arranged on the axle bearing seat in an interference manner. In order to save the installation space, the axle box assembly 2-3 adopts a compact design, the inner ring of the bearing is pressed tightly by a wheel hub and an inner side dust guard, and the outer ring is pressed tightly by the outer flange of the axle box body and the inner side axle box cover. The shaft box body is of a rotating arm type integral casting structure, the front end of the shaft box body is a rotating arm and a node mounting hole, the middle part of the shaft box body is a bearing box, the rear part of the shaft box body is a spring seat, the middle part of the spring seat is provided with a vertical shock absorber seat, and two sides of the spring seat are provided with drain holes.

As shown in fig. 4 and 5, two sets of compact primary suspensions 2-2 are arranged on each set of wheel-to-axle box positioning device 2. The compact primary suspension 2-2 comprises a spiral steel spring 2-2-1, a primary vertical shock absorber 2-2-2 and a rubber pad 2-2-4, the rubber pad 2-2-4 is arranged on a spring seat of the axle box assembly 2-3, the spiral steel spring 2-2-1 is arranged between the rubber pad 2-2-4 and the side beam 1-1, a primary spring seat 1-5 for mounting the spiral steel spring 2-2-1 is arranged below the end part of the side beam 1-1, the primary vertical shock absorber 2-2-2 penetrates through the inner space of the spiral steel spring 2-2-1, the lower end of the primary vertical shock absorber 2-2-2 is connected with the axle box assembly 2-3 through a fastening piece, and the upper end of the primary vertical shock absorber 2-2-2-2 is connected with the vertical shock absorber seat 2-2-3, and the vertical shock absorber seat 2-2-3 is connected with the side beam 1-1 through a fastener. The compact primary suspension 2-2 provides large static deflection and good damping as a primary support.

In order to save installation space, the spiral steel spring 2-2-1 is arranged at the rear end of the axle box assembly 2-3, and the installation plane is lower than the axle center, so that the height of the side beam 1-1 of the framework 1 is greatly reduced on the premise of ensuring larger suspension deflection, and space is reserved for the indoor clearance of a vehicle body. A series of vertical shock absorbers 2-2-2 are arranged inside the spiral steel springs 2-2-1, so that the longitudinal length of the bogie is reduced, an installation space is made for installing equipment under the bogie, and the quality of the bogie is reduced.

As shown in figures 6 and 7, a side beam rectangular window I1-1-1 penetrating through vertical plates on two sides of the side beam 1-1, a side beam rectangular window II 1-1-2 penetrating through an upper cover plate and a lower cover plate of the side beam and a series of spring seats and facilitating installation of a series of vertical shock absorbers 2-2-2 are arranged at the end part of the side beam 1-1, and the side beam rectangular window I1-1-1 is covered through a blocking plate 2-2-5. By adding the measuring rectangular windows at the top and the side of the side beam 1-1, the problem of installation space of a series of vertical shock absorbers 2-2-2 is solved. After the framework and the axle box spring are formed in a falling mode, when a system of vertical shock absorbers 2-2-2 need to be installed, after the bogie is assembled, the system of vertical shock absorbers 2-2-2 are placed into the inner space of the spiral steel spring 2-2-1 from the side beam rectangular window I1-1-1, and then placed into the vertical shock absorber seat 2-2-3 through the side beam rectangular window II 1-1-2. The lower end of the first series of vertical shock absorbers 2-2-2 is connected with the axle box assembly 2-3 through a fastening piece, and the upper end of the first series of vertical shock absorbers 2-2-2 is connected with the side beam 1-1 through a vertical shock absorber seat 2-2-3.

A series of positioning 2-4 of the axle box adopts a rotating arm type positioning, a rotating arm positioning node is a metal rubber vulcanization structure, serial rigidity parameters can be realized on the premise that an external interface is not changed, the requirements of the dynamic performance of the bogie when the bogie runs at different speed grades are met through the installation of different positioning rigidity nodes, and the serial requirements of the bogie within a certain speed grade range are realized.

As shown in fig. 8, a secondary suspension device 3 is arranged at the upper middle part of the side beam 1-1, as shown in fig. 8, the secondary suspension device 3 comprises 4 symmetrically arranged secondary rubber pile rubber 3-1 and 2 transverse dampers 3-2, a secondary rubber pile base 1-4 is arranged on the upper middle surface of the side beam 1-1, a transverse damper base 1-3 is arranged on the upper surface of the cross beam 1-2, the secondary rubber pile rubber 3-1 is mounted on the secondary rubber pile base 1-4 through bolts, and the transverse dampers 3-2 are mounted on the transverse damper base 1-3. The secondary rubber pile rubber 3-1 is used for bearing the upper load of the vehicle and is matched with the transverse shock absorber 3-2 and the compact center pin traction device 4 to improve the running quality and curve passing capacity of the vehicle.

Static and dynamic loads on the upper part of the car body, as well as lateral loads of the car body and the bogie, are transmitted through rubber side bearings. The vibration absorption and sound insulation device is characterized by simple structure, light weight, good vibration absorption and sound insulation, and capability of generating restoring moment and restoring force so as to restore the original position between the bogie and the vehicle body and well improve the stability of the transverse running of the rail engineering vehicle. Since the rubber layer has a small damping characteristic, a lateral damper 3-2 is provided at the cross member 1-2 in order to suppress lateral vibration and hunting when the vehicle runs on a straight line.

The upper part of the middle of the cross beam 1-2 is provided with a compact center pin traction device 4, as shown in fig. 9, the compact center pin traction device 4 comprises a center pin 4-1, a nylon bush 4-2, a center pin sleeve 4-3, a supporting plate 4-4 and a traction baffle 4-5. The compact center pin traction device 4 can connect the frame and the bogie together, effectively transmit traction force and braking force to the upper part of the vehicle body and bear various external steering forces between the vehicle body and the bogie. The middle of the beam 1-2 is provided with a beam rectangular window 1-2-1 for installing a compact center pin traction device 4 and used for accommodating the traction device and installing a traction baffle and the like, the transverse inner side wall of the beam rectangular window 1-2-1 is provided with a traction baffle seat 1-9, and the longitudinal inner side wall of the beam rectangular window 1-2-1 is provided with a transverse stop 1-7. The center pin 4-1 is connected to a center pin seat plate of a vehicle body underframe in a welding mode, the nylon bush 4-2 is installed on the center pin 4-1 through a small clearance fit between a cylindrical inner hole of the nylon bush and the outer surface of a cylindrical traction pin of the center pin 4-1, the center pin sleeve 4-3 is installed on the nylon bush 4-2 through a small clearance fit between a cylindrical inner hole of the center pin and the cylindrical outer surface of the nylon bush 4-2, the support plate 4-4 is installed on a plane at the bottom of the center pin 4-1 through a fastener to limit the nylon bush 4-2 and the center pin sleeve 4-3, the other function of the support plate 4-4 is that when the whole vehicle is lifted, the support plate 4-4 rises along with the whole vehicle and then contacts with a cross beam 1-2 of a framework to support the framework 1, the function of no-binding lifting (hoisting) between the vehicle body and the bogie is realized. The traction baffle 4-5 is arranged on the traction baffle seat 1-9 through a fastener, and the gap between the traction baffle 4-5 and the central pin sleeve 4-3 is adjusted by adding an adjusting pad behind the traction baffle 4-5, so that the gapless traction and braking functions are realized.

Unlike the conventional tapered kingpin traction device, the compact kingpin traction device 4 is mainly characterized in that: the central pin 4-1 and the nylon bush 4-2, the nylon bush 4-2 and the central pin bush 4-3 are matched by adopting small-gap cylindrical surfaces, the periphery of the central pin bush 4-3 is made of rubber materials and is directly matched with a traction seat plate of the framework 1 to realize a traction function, when a vehicle passes through a curve, the rubber outside the central pin bush 4-3 is contacted with the transverse backstop 1-7 of the framework 1 and is deformed, a nonlinear rigidity characteristic is provided, the transverse displacement between the whole vehicle and a bogie is limited, and an elastic transverse backstop effect is achieved. The assembling method has the advantages that the assembling method is simplified on the premise of meeting the application function of the vehicle, the central pin bush does not need to be pressed, complex structures such as a traction beam, a traction pull rod, a transverse stop and an installation fastener of the transverse stop adopted by the traditional bogie structure are eliminated, the manufacturing cost and the material cost are reduced, the overall size of the traction device is reduced, the clearance fit traction device is easier to disassemble, and the rapid disassembly of the vehicle body and the bogie is realized.

The basic brake device 5 is arranged on the outer sides of the two side beams 1-1, as shown in fig. 10, the basic brake device 5 comprises two unit brakes I5-1 and two unit brakes II 5-2, and the basic brake device 5 is arranged on the outer sides of the two side beams 1-1 in an outer arrangement mode to provide braking force for a vehicle. The four unit brakes are symmetrically arranged on the outer side of the bogie and are obliquely and symmetrically arranged, and unit brake mounting seats 1-8 are arranged on the outer side surfaces of the two side beams 1-1. The two unit brakes I5-1 have a parking brake function, and the two unit brakes II 5-2 do not have the parking brake function. In order to reduce the transverse size of the bogie, the unit brake I5-1 adopts a vertical parking cylinder.

The driving device 6 is arranged between the two side beams and on two sides of the cross beam 1-2, as shown in fig. 11, the driving device 6 comprises a secondary gear box 6-4 arranged on a first-end axle gear box seat of the bogie, a first-end gear box 6-1 arranged on a second-end axle gear box seat of the bogie and a transmission shaft 6-3 arranged between the two gear boxes, the first-end gear box 6-1 and the second-end gear box 6-4 are connected with the framework 1 through a pull arm assembly 6-2, and a pull arm seat 1-6 is arranged on the cross beam 1-2 of the framework 1. The lower cover plate of the cross beam is in a concave design and is used for driving a shaft through a bogie. The torque output by the whole vehicle gearbox is output to the secondary gearbox 6-4 and the axle of the first-position end of the bogie through the vehicle-end transmission shaft, and then is transmitted to the primary gearbox 6-1 and the axle of the second-position end of the bogie through the transmission shaft, and the driving wheel pair rotates to enable the whole vehicle to advance.

The secondary rubber pile, the unit brake and the driving device can realize various suspension parameters, braking multiplying power and transmission ratio by replacing internal parts or adjusting rubber formula on the premise of keeping the installation interface and the overall dimension unchanged, and the bogie can meet the application requirements of various engineering vehicles by matching and applying different parameters, thereby greatly improving the application range of the bogie.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. A bogie that is used for track engineering machinery and has compact primary suspension, including framework (1), framework (1) mainly is the H type integral welding structure that two side beams (1-1) and crossbeam (1-2) that the section is box girder construction constitute, its characterized in that: wheel set axle box positioning devices (2) are arranged at two ends of the framework (1), each wheel set axle box positioning device (2) comprises a wheel set (2-1), axle box assemblies (2-3) are symmetrically arranged on an axle at the inner side of wheels of the wheel sets (2-1), the rear ends, arranged at the outer sides of the axles, of the axle box assemblies (2-3) are elastically connected with corresponding ends of side beams (1-1) of the framework (1) through compact primary suspensions (2-2), and the front ends, arranged at the inner sides of the axles, of the axle box assemblies (2-3) are connected with the side beams (1-1) of the framework (1) in a positioning mode through primary positioning (2-4); the device is characterized in that a secondary suspension device (3) is arranged at the upper middle part of each side beam (1-1), a compact center pin traction device (4) is arranged at the upper middle part of each cross beam (1-2), a foundation brake device (5) is arranged at the outer side of each side beam (1-1), and driving devices (6) are arranged between each side beam and at the two sides of each cross beam (1-2).

2. The bogie for a rail working machine having a compact primary suspension according to claim 1, wherein: the compact primary suspension (2-2) comprises a spiral steel spring (2-2-1), a primary vertical shock absorber (2-2-2) and a rubber pad (2-2-4), the rubber pad (2-2-4) is arranged on a spring seat of the axle box assembly (2-3), the spiral steel spring (2-2-1) is arranged between the rubber pad (2-2-4) and a side beam (1-1), a primary spring seat (1-5) for mounting the spiral steel spring (2-2-1) is arranged below the end part of the side beam (1-1), the primary vertical shock absorber (2-2-2) penetrates through the inner space of the spiral steel spring (2-2-1), the lower end of the primary vertical shock absorber (2-2-2) is connected with the axle box assembly (2-3) through a fastener, the upper end of the first series of vertical shock absorbers (2-2-2) is connected with a vertical shock absorber seat (2-2-3), and the vertical shock absorber seat (2-2-3) is connected with the side beam (1-1) through a fastening piece.

3. The bogie for a rail working machine having a compact primary suspension according to claim 2, wherein: the end part of the side beam (1-1) is provided with a side beam rectangular window I (1-1-1) which penetrates through vertical plates at two sides of the side beam (1-1) and is convenient for a series of vertical shock absorbers (2-2-2) to be installed, a side beam rectangular window II (1-1-2) and a side beam rectangular window III (1-1-3) which penetrate through an upper cover plate and a lower cover plate of the side beam and a series of spring seats, and the side beam rectangular window I (1-1-1) is covered by a blocking plate (2-2-5).

4. The bogie for a rail working machine having a compact primary suspension according to claim 1, wherein: the secondary suspension device (3) comprises 4 secondary rubber stack rubbers (3-1) and 2 transverse shock absorbers (3-2), a secondary rubber stack seat (1-4) is arranged on the upper surface of the middle of the side beam (1-1), the transverse shock absorber seat (1-3) is arranged on the upper surface of the cross beam (1-2), the secondary rubber stack rubbers (3-1) are installed on the secondary rubber stack seat (1-4) through bolts, and the transverse shock absorbers (3-2) are installed on the transverse shock absorber seats (1-3).

5. The bogie for a rail working machine having a compact primary suspension according to claim 1, wherein: the compact center pin traction device (4) comprises a center pin (4-1), a nylon bush (4-2), a center pin sleeve (4-3), a supporting plate (4-4) and a traction baffle (4-5), a beam rectangular window (1-2-1) for mounting the compact center pin traction device (4) is arranged in the middle of a beam (1-2), a traction baffle seat (1-9) is arranged on the transverse inner side wall of the beam rectangular window (1-2-1), a transverse stop (1-7) is arranged on the longitudinal inner side wall of the beam rectangular window (1-2-1), the center pin (4-1) is connected to a vehicle body chassis center pin seat plate in a welding mode, and the nylon bush (4-2) is mounted in a center matched manner through a small clearance between the cylindrical inner hole of the nylon bush and the outer surface of the cylindrical traction pin of the center pin (4-1) The central pin sleeve (4-3) is arranged on the nylon bush (4-2) through a small clearance fit between a cylindrical inner hole of the central pin sleeve (4-1) and the cylindrical outer surface of the nylon bush (4-2), the supporting plate (4-4) is arranged on the plane at the bottom of the central pin (4-1) through a fastener, the nylon bush (4-2) and the central pin sleeve (4-3) are limited, the other function of the supporting plate (4-4) is that when the whole vehicle is lifted, the supporting plate (4-4) ascends along with the whole vehicle and then contacts with a cross beam (1-2) of the framework to support the framework (1) to realize the function of no binding and repeated action between the vehicle body and a bogie, the traction baffle plate (4-5) is arranged on the traction baffle seat (1-9) through the fastener, the gap between the traction baffle (4-5) and the central pin sleeve (4-3) is adjusted by adding an adjusting pad behind the traction baffle (4-5), so that the gapless traction and braking functions are realized.

6. The bogie for a rail working machine having a compact primary suspension according to claim 1, wherein: the basic brake device (5) comprises two unit brakes I (5-1) and two unit brakes II (5-2), the basic brake device (5) is arranged on the outer sides of the two side beams (1-1) in an outer side arrangement mode, and unit brake mounting seats (1-8) are arranged on the outer side surfaces of the two side beams (1-1); the two unit brakes I (5-1) have a parking brake function, the two unit brakes II (5-2) do not have the parking brake function, and the unit brakes I (5-1) adopt vertical parking cylinders.

7. The bogie for a rail working machine having a compact primary suspension according to claim 1, wherein: the driving device (6) comprises a secondary gear box (6-4) arranged on a bogie one-position end axle gear box seat, a primary gear box (6-1) arranged on a bogie two-position end axle gear box seat and a transmission shaft (6-3) arranged between the two gear boxes, wherein the primary gear box (6-1) and the secondary gear box (6-4) are connected with the framework (1) through a pull arm component (6-2), and a pull arm seat (1-6) is arranged on a cross beam (1-2) of the framework (1).

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