CN218549721U

CN218549721U - Embedded hub motor suitable for 150 t-level and above dumper

Info

Publication number: CN218549721U
Application number: CN202121900390.XU
Authority: CN
Inventors: 赵国文
Original assignee: Inner Mongolia Xinghui Guochuang Heavy Industry Co ltd
Current assignee: Inner Mongolia Xinghui Guochuang Heavy Industry Co ltd
Priority date: 2021-08-14
Filing date: 2021-08-14
Publication date: 2023-02-28
Anticipated expiration: 2031-08-14

Abstract

The utility model relates to an off-highway tipper technical field, it is specific that one kind is applicable to 150t level and above tipper's embedded in-wheel motor. The utility model provides a simple structure, compactness, rationally distributed large-scale electronic round of mining dump truck directly drives external rotor wheel hub driving motor to solve among the prior art actuating system structure complicacy, the fault point is many, technical problem such as weight is big, realize that dump truck actuating system's fortune dimension is simple, fault rate is extremely low, carrying capacity purpose such as big. The hub motor adopts the outer rotor with a special structural design to directly transmit power to the large electric wheel, removes a reduction transmission part of a reduction gearbox, and has the advantages of compact structure, low failure rate and simple maintenance. And because the inner surface of the outer rotor adopts a permanent magnet mechanism and the stator shaft adopts a water cooling structure, the heat dissipation effect is good, the power density is high and the efficiency is high.

Description

Embedded hub motor suitable for 150 t-level and above self-dumping cars

Technical Field

The utility model relates to an off-highway tipper technical field, it is specific that an embedded in-wheel motor who is applicable to 150t level and above tipper, 150t level in the subject name is proposed according to a possible situation in the embodiment, and it does not constitute the restriction to inventive technical scheme and technical field.

Background

The off-road (mining) electric wheel dumper (hereinafter, dumper or vehicle for short) is a heavy vehicle used for completing rock earth stripping and ore transportation tasks in open mines, and has the working characteristics of short transportation distance, load bearing capacity, high appearance and strong power, and the loading quality is developed to 360 tons at present through continuous function improvement, new technology updating, new materials and new processes since 1963, so that a plurality of series of products are formed, and the off-road (mining) electric wheel dumper becomes an ideal transportation tool for open mines and large hydraulic construction projects with annual mining quantity of more than ten thousand tons. The conventional dumper and the electric dumper improved on the basis have the advantages that the frame structure, the steering mechanism, the suspension system and the like are designed according to the conventional power device, the structure is complex, the occupied space is large, the design of the whole dumper is not facilitated, and the structure is simplified.

The suspension system is a general term for a force transmission mechanism for elastic connection between a vehicle frame and an axle, i.e. a vehicle running gear (including but not limited to wheel related parts such as a wheel hub, a wheel rim, a tire, etc.), and is one of the most important assemblies of an electric wheel vehicle. Rim structures in vehicle traveling devices are common, such as chinese patent documents: CN212949991U discloses an engineering tire specially used for an electric wheel dumper and a rim structure matched and suitable for the tire: the rim comprises a rim body, a seat ring, a retainer ring, a lock ring, an air nozzle and the like; the rim body is used for assembling and supporting an engineering tire; the seat ring is a tire axial supporting component detachably connected with the rim body; the retainer ring is a wheel flange detachably connected with the wheel rim body and has the function of locking the ring; the locking ring is an elastic ring which is used for locking the retainer ring and/or the seat ring and is located in a locking ring groove. The electric wheel dumper is a mining dumper directly driven by a hub motor, and the traditional mechanisms such as a clutch, a transmission shaft, a main speed reducer, a differential mechanism and the like are replaced by electric transmission, so that the structure of the dumper is greatly simplified. The electric drive dumper can be divided into an electric axle dumper and an electric wheel dumper according to the arrangement position of a motor of the electric drive dumper. The electric axle self-dumping truck is characterized in that an electric motor is arranged in a drive axle housing, 2 electric motors drive wheels at two sides through a reduction gear half shaft and a wheel side reducer respectively, and the structure of a drive axle is similar to that of a mechanical transmission self-dumping truck; the electric wheel dumper is characterized in that a motor is directly arranged in a wheel hub and is combined with a transmission system, a brake and a wheel edge reducer into a whole, and a hub motor is designed by integrating a power system, a transmission system and a brake system of a vehicle. The electric transmission is a transmission mode that an engine directly drives a generator, the electricity generated by the generator is directly supplied to a motor, and electric energy is transmitted to a driving motor combined with a driving wheel hub reducer through a cable to drive wheels to rotate. In the early development of electric wheel technology, a direct-current motor driving system is generally adopted, and the system has the characteristics of low rotating speed and high torque and has higher transmission efficiency. However, with the development of technology, compared with an ac motor, the dc motor has a large volume and weight, a large noise, a serious electromagnetic interference, and a soft mechanical characteristic. The alternating current motor has the advantages of small volume, light weight, simple structure, low cost, small maintenance workload and the like, which cannot be realized by the direct current motor. Electric drive systems are driven from dc to ac motors, driving being a necessary trend. The alternating current motor with high efficiency, energy conservation and high protection level is the best choice for the characteristics of small transportation distance of the strip mine, large line gradient, low driving speed, much dust in the transportation environment and the like. With the continuous progress of the technology, the direct current motor and the alternating current motor are both in interest and harm avoidance, and when the direct current motor is applied to the field of the dump truck, the volume of the direct current motor is reduced as much as possible, so that the motor can be more closely combined with wheels, the structure of each part of the truck body is simplified, and the working efficiency is improved.

The permanent magnet synchronous motor provides excitation by the permanent magnet, so that the structure of the motor is simpler, the processing and assembling cost is reduced, a collecting ring and an electric brush which are easy to cause problems are omitted, and the running reliability of the motor is improved; and because excitation current is not needed, excitation loss is avoided, and the efficiency and the power density of the motor are improved. The permanent magnet synchronous motor is composed of a stator, a rotor, an end cover and the like. The stator is basically the same as a common induction motor, and a lamination structure is adopted to reduce iron loss during the operation of the motor. The rotor can be made into solid or laminated by lamination. The armature winding can adopt a concentrated whole-pitch winding, and can also adopt a distributed short-pitch winding and an unconventional winding.

Reference documents:

1. structural feature analysis of permanent magnet synchronous motors, chen Lehong chapter, power station system engineering.2011, 27 (04);

2. a permanent magnet synchronous motor (https:// baike. Baidu. Com/item/permanent magnet synchronous motor/8717409 question mark fr = aladdin);

3. chinese patent document No. CN202110750035.7 (for reference for distinction of prior art);

4. chinese patent documents: CN212949991U is a special engineering tire for the electric wheel dumper;

5. chinese patent documents: the large electric wheel of the CN109546799A mining dump truck directly drives the driving motor of the outer rotor wheel edge.

Disclosure of Invention

The utility model discloses an aim at: the large-scale electric wheel direct-drive outer rotor hub driving motor for the mining dump truck is simple and compact in structure and reasonable in layout, solves the technical problems that a driving system in the prior art is complex in structure, multiple in fault points, large in weight and the like, and achieves the purposes that the driving system for the dump truck is simple in operation and maintenance, extremely low in fault rate, large in carrying capacity and the like.

Specifically, the following description is provided: 150t level in the subject name of this application can refer to the load mass of tipper, also can be whole car dead weight, can also be the sum of load and whole car dead weight under the full load condition.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides an embedded in-wheel motor that is applicable to 150t level and above tipper, hereinafter be referred to as "in-wheel motor", its characterized in that:

the hub motor is a permanent magnet synchronous alternating current motor and adopts an outer rotor structure design;

the hub motor comprises a stator, a rotor, an armature winding and a permanent magnet;

the armature winding is arranged on a stator, and the stator forms a wheel shaft of the vehicle wheel;

the rim of the wheel forms a rotor of the hub motor, and the permanent magnet is arranged on the inner wall of the rim;

both sides of the hub motor are respectively provided with an end part, and one end of the end part, which is contacted with the stator, is provided with a bearing so as to realize movable connection with the stator;

the stator is arranged in the rim and coaxial with the rim, and one end of the stator, facing the inner side of the vehicle suspension system, is provided with a connecting disc which is connected with the vehicle suspension system through a connecting part.

The rim comprises a rim body, a seat ring, a retainer ring, a lock ring and an air nozzle; the rim body is used for assembling and supporting an engineering tire; the seat ring is a tire axial supporting part detachably connected with the rim body; the retainer ring is a wheel flange detachably connected with the wheel rim body and has the function of locking the ring; the locking ring is an elastic ring which is used for locking the retainer ring and/or the seat ring and is located in a locking ring groove.

The end parts of the two sides of the hub motor are respectively a front end cover and a rear end cover, the front end cover is the end part facing the outer side of the vehicle and far away from the direction of the suspension system, and the rear end cover is the end part facing the inner side of the vehicle and close to the direction of the suspension system; the rear end cover is provided with a brake disc; a brake caliper is arranged on a connecting disc on the inner side of the axle; the brake caliper is assembled and connected with the brake disc.

The bearing comprises a first bearing and a second bearing, wherein the first bearing is close to the front end cover, and the second bearing is close to the rear end cover.

The stator comprises a shaft main body section and a shaft assembling end, wherein the shaft main body section is positioned at the central axis of the rotor and is used for assembling an armature winding, an iron core, a power cable, a control cable, a cooling water pipe and a brake oil pipe; the shaft fitting end is located at the end of the shaft main body section on the side facing the suspension system, and the shaft fitting end is disc-shaped, and the edge of the shaft fitting end further extends inwards in the axial direction to form a connecting disc.

The diameter of the shaft fitting end in the radial direction is larger than the cross-sectional diameter of the shaft main body section.

The width of the hub is 1000-1500mm, the diameter is 1500-2000mm, and the width and the diameter are based on the outermost contour of the hub.

The specification size of the hub motor is smaller than or equal to that of the hub.

The width of the hub motor is 1000-1500mm, and the diameter is 1500-2000mm.

The perpendicular distance from the lowest position of the rotor, i.e. the hub (where the perpendicular distance to the central axis of the in-wheel motor is smallest) to the central axis of the in-wheel motor is less than 1500mm.

Preferably, the width of the hub motor is 1037-1210mm, and the diameter of the hub motor is 1638-1710mm.

The utility model has the advantages that:

1. the hub motor of the dumper adopts the outer rotor with a special structural design to directly transmit power to the large electric wheel, removes a reduction transmission part of a reduction gearbox, and achieves compact structure, low failure rate and simple maintenance. Because the inner surface of the outer rotor adopts a permanent magnet mechanism and the stator shaft adopts a water cooling structure, the heat dissipation effect is good, the power density is high and the efficiency is high;

2. each wheel can be independently controlled, so that a Traction Control System (TCS), an anti-lock brake system (ABS) and a dynamic control system (VDC) with better performance and lower cost can be conveniently realized, the electronization and initiative of an automobile chassis system can be easily realized, and the driving performance and the running performance of a vehicle can be greatly improved;

3. the dump truck adopts a frame design and a suspension system with special structures and shapes by matching with the motor, so that the structure of the truck body is simplified and optimized to the maximum extent, and the whole truck has compact structure, smaller size, reasonable layout, extremely low failure rate, and extremely little maintenance or even no maintenance under the condition of unchanged or even increased load;

4. the dumper adopts a lightweight design, and on one hand, a motor, a suspension system and a frame which are specially designed are adopted, so that a plurality of conventional devices are saved and simplified for the dumper, and the whole dumper is simplified and lightened; on the other hand, the carriage body adopts the design of splicing the steel plate and the aluminum alloy inserting strip, and further reduces the weight of the whole vehicle.

Drawings

The attached drawings are as follows:

fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention, in which:

ha is the width of the wheel hub, hb is the radius of the wheel hub, hc is that the vertical distance from the lowest position of the wheel hub to the central axis of the wheel hub motor is small, and the middle horizontal dot-and-dash line in the figure is the central axis of the wheel hub motor.

Wherein,

1 suspension system 2 connecting part 3 brake disc 4 connecting disc 5 rear end cover 6 rim body 7 second bearing 8 first bearing 9 race 10 retainer ring 11 retainer ring 12 air cock 13 front end cover 14 armature winding 15 permanent magnet 16 stator (wheel axle) 17 rotor (wheel rim) 18 axle main body section 19 axle assembly end.

Detailed Description

[ example 1 ] A method for producing a polycarbonate

As shown in fig. 1 and 2, the embedded hub motor suitable for a dumper with 150t class and above in this embodiment is hereinafter referred to as "hub motor", and is characterized in that: the hub motor is a permanent magnet synchronous alternating current motor and adopts an outer rotor structure design; the hub motor comprises a stator, a rotor, an armature winding and a permanent magnet; the armature winding is arranged on a stator, and the stator forms a wheel shaft of the vehicle wheel; the rim of the wheel forms a rotor of the hub motor, and the permanent magnet is arranged on the inner wall of the rim; both sides of the hub motor are respectively provided with an end part, and one end of the end part, which is contacted with the stator, is provided with a bearing so as to realize movable connection with the stator; the stator is arranged in the rim and is coaxial with the rim, and one end, facing the inner side of the vehicle suspension system, of the stator is provided with a connecting disc which is connected with the vehicle suspension system through a connecting part. It should be noted that: the hub motor in this embodiment is an outer rotor motor, and is different from a conventional motor in that a rim and a hub of a wheel are matched with an end cover to form a motor casing, that is, the whole motor is completely assembled inside the rim, a wheel shaft is used as a stator, the stator is inside and fixed (does not rotate), the rim of the wheel is used as a rotor (and is also used as a casing of the motor), and a special engineering tire is directly assembled outside the rim used as the rotor to form a complete wheel. The design has the advantages that the motors are completely assembled inside the wheels, the motors do not occupy axial space any longer, further integration of the driving system and the traveling device can be realized through further optimization design of the tire flat ratio and matching with a special suspension system, the width of the wheels is the maximum width of the motors, and therefore unnecessary structures and assembly relations among the transmission system, the suspension system and the driving system in the conventional technology can be greatly reduced, and the chassis of the whole vehicle is further simplified. In addition, the independent control of a single wheel can be realized through a matched power control system, and a more flexible walking mode is realized, so that the dump truck or other machines and vehicles provided with the motor are more convenient to use.

The rim comprises a rim body, a seat ring, a retainer ring, a lock ring and an air nozzle; the rim body is used for assembling and supporting an engineering tire; the seat ring is a tire axial supporting part detachably connected with the rim body; the retainer ring is a wheel flange detachably connected with the wheel rim body and has the function of locking the ring; the locking ring is an elastic ring which is used for locking the retainer ring and/or the seat ring and is located in a locking ring groove. Regarding the specific structure of the rim, further reference may be made to any solution in the prior art, which is not described in detail.

[ example 2 ]

On the basis of the above embodiments, the present embodiment provides a specification and size range of a specific hub motor, which is as follows.

The diameter of the shaft fitting end in the radial direction is larger than the cross-sectional diameter of the shaft main body section. In this embodiment, the axle mounting end is configured to fit the connection component of the suspension system, i.e., the wheel (including the rim and the motor, etc.) can be mounted and connected to the suspension system with the simplest connection structure while ensuring the distribution and balance of forces. And the main shaft body section is used for bearing the wheel and assembling the hub motor, so that the upper shaft body section is required to adopt a more suitable specification and size under the condition of ensuring the strength, and a motor accommodating cavity formed between the wheel shaft and the wheel rim is wider, so that motor related parts can be assembled in the motor accommodating cavity more freely and flexibly. Based on the above consideration, the diameter of the shaft assembling end is larger than that of the shaft main body section, so that the assembly between the wheel shaft and the suspension system is more stable; in addition, the axial height of the shaft-fitting end (i.e., the width of the coupling disc in the view of fig. 1) should be reduced as much as possible to make the motor-accommodating chamber larger. Preferably, the axial height of the shaft fitting end is between 1 and 300mm, more preferably between 80 and 240 mm.

The width of the hub motor is 1000-1500mm, and the diameter of the hub motor is 1500-2000mm.

The perpendicular distance from the lowest part of the rotor, namely the hub (the perpendicular distance from the lowest part of the rotor to the central axis of the in-wheel motor is the smallest) to the central axis of the in-wheel motor is less than 1500mm.

Other basic constructions of electric machines include, but are not limited to, the following: CN209913632U is a high-power water-cooled switched reluctance motor for a pure electric off-highway rigid dumper, CN103124127A is a shafting-free outer rotor permanent magnet synchronous motor with a stator water-cooling structure, and CN205811826U is an outer rotor permanent magnet synchronous motor and the like are already described, and are not repeated in the part of common knowledge.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides an embedded in-wheel motor suitable for 150t level and above tipper which characterized in that:

2. The embedded hub motor applicable to dumper trucks with 150t class and above according to claim 1, characterized in that:

the rim comprises a rim body, a seat ring, a retainer ring, a lock ring and an air nozzle;

the rim body is used for assembling and supporting an engineering tire;

the seat ring is a tire axial supporting component detachably connected with the rim body;

the retainer ring is a wheel flange detachably connected with the wheel rim body and has the function of locking the ring;

the locking ring is an elastic ring which is used for locking the retainer ring and/or the seat ring and is located in a locking ring groove.

3. The embedded hub motor suitable for a dumper with 150t grade and above as claimed in claim 1, wherein:

4. The embedded hub motor applicable to dumper trucks with 150t class and above according to claim 3, characterized in that:

5. The embedded hub motor applicable to dumper trucks with 150t class and above according to claim 1, characterized in that:

the stator comprises a shaft main body section and a shaft assembling end, wherein the shaft main body section is positioned at the central axis of the rotor and is used for assembling an armature winding; the shaft fitting end is located at the end of the shaft main body section on the side facing the suspension system, and the shaft fitting end is disc-shaped, and the edge of the shaft fitting end further extends inwards in the axial direction to form a connecting disc.

6. The embedded hub motor applicable to dumper trucks with 150t class and above according to claim 5, characterized in that:

7. The embedded hub motor suitable for a dumper with 150t class and above according to any one of claims 1-6, characterized in that:

8. The embedded hub motor applicable to dumper trucks with 150t class and above according to claim 7, characterized in that:

the width of the hub motor is 1037-1210mm, and the diameter of the hub motor is 1638-1710mm.