Wheel edge driving assembly connecting structure, dismounting and mounting method and electrically-driven bulldozer

Abstract

The invention discloses a wheel-side driving assembly connecting structure, a dismounting and mounting method and an electrically-driven bulldozer, and the wheel-side driving assembly connecting structure comprises a rack rear axle box which is used as an integral mounting reference of a wheel-side connecting assembly; the two wheel edge connecting assemblies are symmetrically arranged, and each wheel edge connecting assembly comprises a speed reducer, a transition flange plate and a wheel edge motor; the mounting bolt group comprises a first mounting bolt, a second mounting bolt and a third mounting bolt; the wheel-side motor is fixed on the transition flange plate through a third mounting bolt, the transition flange plate is detachably connected with the rack rear axle box through a second mounting bolt, and the speed reducer is detachably connected with the rack rear axle box through a first mounting bolt; through the connection cooperation, the speed reducer can be independently disassembled, or the speed reducer and the wheel-side motor can be assembled and disassembled together. The disassembly and assembly convenience is remarkably improved, and the operation and maintenance difficulty and risk are reduced; the working condition adaptability is high, the modularization degree is improved, and the development cost is reduced.

Description

Technical Field

[0001] This invention relates to a wheel-side drive assembly connection structure, disassembly and assembly method, and an electric drive bulldozer, belonging to the field of electric drive bulldozers. Background Technology

[0002] As an important category of new energy construction machinery, electric-driven bulldozers have entered a critical stage of technological development. In the current mainstream electric-driven bulldozer technology solutions, the installation of the wheel-side drive assembly generally adopts a structure in which the wheel-side drive motor and the wheel-side reducer are first connected, and then the reducer is directly fixed to the frame by matching the mounting stop of the wheel-side reducer with the inner stop of the frame. This completes the assembly of the entire wheel-side drive assembly.

[0003] However, this traditional structure has two major pain points:

[0004] Firstly, maintenance is inconvenient and poses high safety risks. Due to the high-voltage characteristics of the wheel-side drive motor, a large number of high-voltage and low-voltage control harnesses need to be laid externally. In the traditional structure, the motor and reducer, and the reducer and frame are directly bound. Once the wheel-side reducer fails and needs to be repaired, the wheel-side reducer and the wheel-side drive motor must be completely removed. This requires first removing all high-voltage and low-voltage control harnesses from the motor. During the disassembly process, the cab, rollover canopy, rectifier cabinet, and inverter cabinet also need to be removed simultaneously. In some scenarios, even a part of the hydraulic system needs to be disassembled. Not only is maintenance time-consuming and labor-intensive, but the frequent disassembly of the high-voltage harnesses is prone to local fatigue damage, which poses a safety hazard to the subsequent operation of the entire machine.

[0005] Secondly, the machine suffers from poor adaptability to various working conditions and high development costs. In special working conditions such as extremely wetlands, to improve the overall passability of the machine, it is usually necessary to increase the width of the track plates to reduce the ground pressure. However, the traditional installation method is limited by the fixed dimensions of the wheel-side reducer, wheel-side drive motor and frame. If wider track plates are to be adapted, the structural dimensions of the wheel-side reducer or frame must be redesigned, resulting in low uniformity of the overall machine. This directly leads to the risk of increased development costs and extended development cycles, making it difficult to meet the rapid adaptation requirements of diverse working conditions. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a wheel-side drive assembly connection structure, a disassembly and assembly method, and an electric-driven bulldozer.

[0007] To achieve the above objectives, the present invention employs a wheel-side drive assembly connection structure, comprising:

[0008] The rear axle housing serves as the overall mounting reference for the wheel-side connection assembly.

[0009] The wheel-side connection assembly is provided in two symmetrical sets, and each set of the wheel-side connection assembly includes a reducer, a transition flange and a wheel-side motor;

[0010] The mounting bolt set comprises a first mounting bolt, a second mounting bolt and a third mounting bolt;

[0011] The wheel-side motor is fixed to the transition flange plate through the third mounting bolt, the transition flange plate is detachably connected to the rear axle box of the frame through the second mounting bolt, and the speed reducer is detachably connected to the rear axle box of the frame through the first mounting bolt.

[0012] As an improvement, the wheel-side motor is further positioned through cooperation of a motor outer edge surface of the wheel-side motor and an inner stop opening of the transition flange plate, so that the wheel-side motor and the transition flange plate are fixed.

[0013] As an improvement, the speed reducer is positioned through cooperation of an inner stop opening of a mounting flange of the speed reducer and an outer edge surface of the flange plate of the transition flange plate.

[0014] As an improvement, the wheel-side motor is indirectly associated with the rear axle box of the frame through the transition flange plate, so that the wheel-side motor and the rear axle box of the frame are completely decoupled.

[0015] As an improvement, the transition flange plate and the rear axle box of the frame are cooperated through double-layer stop openings, and the second mounting bolt is arranged through corresponding hole positions of the transition flange plate and the rear axle box of the frame.

[0016] As an improvement, the transition flange plate is uniformly provided with motor mounting holes for mounting the wheel-side motor and flange plate mounting holes for mounting the second mounting bolt and connecting the rear axle box of the frame.

[0017] As an improvement, when the wheel-side connecting assembly is assembled, the second mounting bolt is arranged through corresponding hole positions of the transition flange plate and the speed reducer, so as to connect the speed reducer and the transition flange plate; when the speed reducer is separately disassembled, the second mounting bolt is arranged in corresponding hole positions of the transition flange plate and the rear axle box of the frame, so as to fix the transition flange plate and the rear axle box of the frame.

[0018] As an improvement, in a conventional mounting state, the speed reducer is connected to the rear axle box of the frame through the uniformly distributed speed reducer mounting holes on the outer side and the first mounting bolt; the speed reducer is further provided with a speed reducer top screw hole.

[0019] In addition, the second aspect of the present application also provides a disassembly and assembly method of the wheel-side driving assembly connecting structure, comprising the following steps:

[0020] (1) Overall assembly: first, the wheel rim motor is fixed to the transition flange plate through the cooperation of the motor outer edge surface and the inner stop of the transition flange plate, and then the third mounting bolt is used to fix the motor mounting hole; then the reducer is positioned through the cooperation of the installation flange inner stop and the flange plate outer edge surface of the transition flange plate, and temporarily fixed by the second mounting bolt, forming a pre-assembled assembly of wheel rim motor-transition flange plate-reducer; then the pre-assembled assembly is matched with the rear axle box of the frame through the double-layer stop of the transition flange plate, and is preliminarily fixed by the first mounting bolt through the reducer mounting hole; finally, the second mounting bolt temporarily fixed is removed, and the transition flange plate is turned into the corresponding hole position of the rear axle box of the frame, and the assembly of the wheel rim motor and the rear axle box of the frame is completed;

[0021] (2) Separate disassembly of the reducer: only the first mounting bolt is unscrewed, the jack screw is screwed into the reducer jack screw hole, and the transition flange plate is pushed to separate the stop cooperation of the reducer and the transition flange plate, so that the reducer can be taken out along the axial direction, and at this time the wheel rim motor and the transition flange plate are still fixed with the rear axle box of the frame through the second mounting bolt;

[0022] (3) Overall disassembly of the assembly: first, unscrew the second mounting bolt, rethread the corresponding hole positions of the transition flange plate and the reducer, and restore the wheel rim motor-transition flange plate-reducer assembly; then unscrew the first mounting bolt, screw the jack screw into the reserved mounting hole on the transition flange plate, and push the rear axle box of the frame to separate the double-layer stop of the transition flange plate and the rear axle box of the frame, and take out the wheel rim motor-transition flange plate-reducer assembly along the axial direction.

[0023] Finally, the third aspect of the present application also provides an electrically driven bulldozer, wherein the wheel rim driving assembly connecting structure is installed on the electrically driven bulldozer.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1. The disassembly and assembly convenience is significantly improved, and the operation and maintenance difficulty and risk are reduced. The present application relies on the double detachable connection design of the wheel rim motor-transition flange plate-frame rear axle box and the reducer-frame rear axle box (the wheel rim motor is fixed to the transition flange plate by the third mounting bolt, and the transition flange plate and the reducer are connected to the frame rear axle box by the second and first mounting bolts), which specifically solves the pain point of the disassembly and assembly inconvenience of the wheel rim driving assembly of the new energy bulldozer: on the one hand, the reducer can be separately disassembled / installed (without the need to remove the wheel rim motor and the wire harness, avoiding the safety risk of high-voltage wire harness operation in traditional disassembly and assembly); on the other hand, through the function switching of the second mounting bolt (connecting the transition flange plate and the reducer or the transition flange plate and the frame), the wheel rim motor-transition flange plate-reducer assembly can be disassembled / installed as a whole, which is suitable for the whole machine overhaul scene, reduces the assembly steps of scattered parts, avoids the loss or collision of parts, and greatly optimizes the operation and maintenance flexibility.

[0026] 2. Strong working condition adaptability, improved modular degree and reduced development cost. The application uses a transition flange as the connection core of the wheel hub motor, the speed reducer and the rear axle box of the frame, when the overall machine needs to improve the passing performance (such as adapting to the super wet ground working condition), without structural modification of the core components such as the wheel hub motor, the speed reducer and the rear axle box of the frame, only by replacing the transition flange with different thickness specifications, the adaptability of the track plate width can be easily increased; avoid the repeated research and development of the motor installation interface and the speed reducer transmission parameters in the traditional scheme, reduce the development cycle, research and development and manufacturing cost, and the two groups of wheel edge connection components arranged symmetrically can be universal and interchangeable, further reducing the types of spare parts inventory, reducing the overall machine production cost and market response cycle. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a structural section view of the present application;

[0029] Figure 2 is a structural isometric view of the present application;

[0030] In the figure: 1, left speed reducer, 2, left transition flange, 3, left wheel hub motor, 4, rear axle box of frame, 5, right wheel hub motor, 6, right transition flange, 7, right speed reducer, 8, first mounting bolt, 9, second mounting bolt, 10, third mounting bolt, 11, motor outer edge surface, 12, flange outer edge surface, 13, motor mounting hole, 14, reserved mounting hole, 15, speed reducer top screw hole, 16, speed reducer mounting hole, 17, flange mounting hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the technical scheme of the present application will be described in detail through specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed description of the technical scheme of the present application, and not limitation of the technical scheme of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0032] In the description of the present application, it should be noted that unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] As shown in Figure 1 、 Figure 2 A wheel drive assembly connection structure, comprising a frame rear axle box 4, a wheel side connection assembly and a mounting bolt set;

[0034] The frame rear axle box 4 serves as the overall mounting reference of the wheel side connection assembly, and its structural strength is adapted to the impact load requirement during bulldozer operation;

[0035] The wheel side connection assembly is symmetrically provided with two groups, namely left and right wheel side connection assemblies, and the two groups are completely identical in structure. The left wheel side connection assembly comprises a left speed reducer 1, a left transition flange plate 2 and a left wheel side motor 3. The right wheel side connection assembly comprises a right speed reducer 7, a right transition flange plate 6 and a right wheel side motor 5 (for the convenience of description, the right wheel side connection assembly is taken as an example for description hereinafter).

[0036] The mounting bolt set comprises a first mounting bolt 8, a second mounting bolt 9 and a third mounting bolt 10. The three types of bolts are matched with the force requirement of the corresponding components, and are used to realize the detachable connection and function switching between the components, so as to avoid assembly errors caused by mixed use of multiple specifications of bolts.

[0037] The right wheel side motor 5 is fixed to the right transition flange plate 6 through the third mounting bolt 10. The right transition flange plate 6 is detachably connected with the frame rear axle box 4 through the second mounting bolt 9. The right speed reducer 7 is detachably connected with the frame rear axle box 4 through the first mounting bolt 8. Through the above-mentioned cooperative connection of multiple components, the right speed reducer 7 can be individually disassembled without the need to remove the right wheel side motor 5 and the wire harness, thereby reducing the maintenance difficulty. In addition, the right speed reducer 7 and the right wheel side motor 5 can be jointly installed and disassembled, which is adapted to the overall replacement requirement of the components during the overhaul of the whole machine, and greatly improves the disassembly flexibility and the maintenance efficiency of the whole machine.

[0038] In some embodiments, as shown in Figure 2 When the right wheel side motor 5 is fixed to the right transition flange plate 6 through the third mounting bolt 10, it is also positioned through the cooperation of the motor outer rim surface 11 of the right wheel side motor 5 and the inner stop opening of the right transition flange plate 6. Through the double limiting structure of bolt fixation and stop opening positioning, not only the coaxiality of the right wheel side motor 5 and the right transition flange plate 6 is ensured to avoid vibration caused by eccentricity during motor operation, but also the stress of the bolt is dispersed to prolong the service life of the bolt and improve the connection stability.

[0039] In some embodiments, as shown in Figure 2 The right speed reducer 7 is positioned by the flange inner stop of its own mounting flange cooperating with the flange outer edge surface 12 of the right transition flange plate 6. The stop cooperation design can accurately position the mounting position of the right speed reducer 7, ensure the accurate butt joint of the inner spline sleeve of the speed reducer and the output shaft of the right wheel rim motor 5, avoid transmission abnormal sound, and provide a guide reference for subsequent disassembly, reducing the damage of parts during disassembly and assembly.

[0040] In some embodiments, as shown in Figure 2 The right wheel rim motor 5 is not directly connected with the rear axle box 4 of the frame, but indirectly connected with the rear axle box 4 of the frame through the right transition flange plate 6, forming complete decoupling of the right wheel rim motor 5 and the rear axle box 4 of the frame. The decoupling design can avoid the problem of disassembling the motor wire harness when repairing the right speed reducer 7. The traditional structure needs to disassemble the high / low voltage wire harness, which has safety risks. At the same time, it reduces the resonance of the motor caused by the transmission of frame vibration, protects the internal elements of the motor, and prolongs the service life of the motor.

[0041] In some embodiments, as shown in Figure 2 The right transition flange plate 6 and the rear axle box 4 of the frame are cooperated by double-layer stop. The right transition flange plate 6 is provided with an outer stop and an inner stop, the rear axle box 4 of the frame is provided with an adapted inner stop and an outer stop, and the second mounting bolt 9 is fixed through the corresponding hole positions of the two. Compared with single-layer stop, double-layer stop greatly increases the contact area, can more evenly transmit load, avoids deformation of the right transition flange plate 6 due to uneven stress, and improves the impact resistance of the assembly, adapts to the vibration and bumping working conditions in the harsh working environment of the bulldozer.

[0042] In some embodiments, as shown in Figure 2 The right transition flange plate 6 is uniformly distributed with motor mounting holes 13 for mounting the right wheel rim motor 5, and flange plate mounting holes 17 for mounting on the rear axle box 4 of the frame. The uniform hole design makes the bolt force uniform, avoids local stress concentration leading to flange cracking, and at the same time, the standardized hole layout facilitates batch processing and production, reduces manufacturing cost, and provides universality for subsequent component replacement.

[0043] In some embodiments, as shown in Figure 2As shown, the second mounting bolt 9 has a function switching characteristic: in the overall assembly stage of the right wheel side connecting assembly, the second mounting bolt 9 is arranged in the corresponding reserved mounting hole 14 of the right transition flange plate 6 and the right speed reducer 7, so that the two are pre-fixed, and the assembly is hoisted and installed as a whole; when the right speed reducer 7 is separately disassembled, the second mounting bolt 9 is arranged in the corresponding hole position of the right transition flange plate 6 and the rear axle box 4 of the rack, so that the right transition flange plate 6 and the right wheel side motor 5 are fixed, without the need for additional fixing bolts, which simplifies the structure design and reduces the number of components and assembly complexity.

[0044] In some embodiments, in the conventional mounting state, the right speed reducer 7 is connected to the rear axle box 4 of the rack through the uniformly distributed speed reducer mounting holes 16 and the first mounting bolt 8, and the uniformly distributed bolt layout improves the fixing stability of the speed reducer; the speed reducer top screw hole 15 is also provided on the right speed reducer 7, which is used for pushing and separating the parting stop when it is separately disassembled, so as to avoid damage to the part when it is hard disassembled; the hole position design not only ensures the realization of the function of the speed reducer, but also considers the convenience of disassembly and assembly.

[0045] In addition, the second aspect of the present application also provides a disassembly and assembly method of the wheel side drive assembly connecting structure, taking the right wheel side connecting assembly as an example, which comprises the following steps:

[0046] (1) Overall assembly: first, the right wheel side motor 5 is positioned through the cooperation of the motor outer edge surface 11 and the inner stop of the right transition flange plate 6 (to ensure coaxiality), then the third mounting bolt 10 is arranged in the corresponding motor mounting hole 13 of the right wheel side motor 5 and the right transition flange plate 6 to fix the two, so as to avoid loosening of the right wheel side motor 5; then the right speed reducer 7 is positioned through the cooperation of the mounting flange inner stop and the flange plate outer edge surface 12 of the right transition flange plate 6, and the second mounting bolt 9 is arranged in the corresponding reserved mounting hole 14 of the right speed reducer 7 and the right transition flange plate 6 to temporarily fix the right speed reducer 7 and the right transition flange plate 6, forming a pre-assembly assembly of the right wheel side motor 5-right transition flange plate 6-right speed reducer 7, which is convenient for overall handling and installation and reduces the on-site assembly steps; then the pre-assembly assembly is matched with the rack rear axle box 4 through the double-layer stop of the right transition flange plate 6, which can improve the assembly accuracy, and the first mounting bolt 8 is arranged in the speed reducer mounting hole 16 to preliminarily fix the right speed reducer 7 and the rack rear axle box 4; finally, the temporarily fixed second mounting bolt 9 is removed and arranged in the corresponding hole position of the right transition flange plate 6 and the rack rear axle box to be fixed, and the assembly of the right wheel side motor 5 and the rack rear axle box 4 is decoupled, which prepares for the subsequent separate disassembly of the speed reducer;

[0047] (2) Reducer separate disassembly: only twist off the first mounting bolt 8, release the fixation of the right reducer 7 and the rear axle housing 4 of the frame, twist in the jack screw through the reducer top screw hole 15 of the right reducer 7, push the right transition flange plate 6 to separate the right reducer 7 and the right transition flange plate 6 from the stop opening cooperation, avoid hard disassembly damage to the stop opening, and then take out the right reducer 7 along the axial direction; At this time, the right wheel edge motor 5 and the right transition flange plate 6 are still fixed with the rear axle housing 4 of the frame through the second mounting bolt 9, without the need to remove the motor and the wire harness, greatly shortening the maintenance time and reducing the safety risk;

[0048] (3) Component integral disassembly: first twist off the second mounting bolt 9, release the fixation of the right transition flange plate 6 and the rear axle housing 4 of the frame, rethread the reserved mounting hole 14 of the right transition flange plate 6 and the right reducer 7, and restore the right wheel edge motor 5-right transition flange plate 6-right reducer 7 integral assembly; Then twist off the first mounting bolt 8, twist in the jack screw through the reserved mounting hole 14 on the right transition flange plate 6, push the rear axle housing 4 to separate the double-layer stop opening of the right transition flange plate 6 and the rear axle housing 4 of the frame, and take out the integral assembly along the axial direction; This process does not need to disassemble each component, adapts to the quick disassembly and assembly demand of the whole machine overhaul, and improves the maintenance efficiency.

[0049] Finally, the application also provides an electrically-driven bulldozer, wherein the wheel edge drive assembly connecting structure is installed on the electrically-driven bulldozer.

[0050] Among them, the left wheel edge connecting assembly includes a left reducer 1, a left transition flange plate 2 and a left wheel edge motor 3, and the connection mode and disassembly logic are completely consistent with those of the right wheel edge connecting assembly; Through the symmetrically-installed two groups of wheel edge connecting assemblies, the balance of the left and right wheel edge driving forces of the bulldozer is ensured, the unified structure design reduces the types of machine components, improves the unified type degree, and reduces the research and manufacturing costs.

[0051] In addition, those skilled in the art can understand that, although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments also means that it is within the protection scope of the application and forms different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

Claims

1. A wheel-side drive assembly connection structure, characterized in that, Comprising: Rear axle housing (4) as the overall installation reference of wheel-side connecting assembly; Wheel-side connecting assembly, symmetrically provided with two groups, each group of wheel-side connecting assembly comprising a reducer, a transition flange and a wheel-side motor; Mounting bolt set, comprising a first mounting bolt (8), a second mounting bolt (9) and a third mounting bolt (10); The wheel-side motor is fixed to the transition flange through the third mounting bolt (10), the transition flange is detachably connected with the rear axle housing (4) through the second mounting bolt (9), and the reducer is detachably connected with the rear axle housing (4) through the first mounting bolt (8); through the above connection and cooperation, the reducer can be separately disassembled, or the reducer and the wheel-side motor can be jointly installed and disassembled.

2. The wheel drive assembly connection structure according to claim 1, characterized by The wheel-side motor is further positioned by cooperation of the motor outer edge surface (11) of the wheel-side motor and the inner stop opening of the transition flange, so as to realize the fixation of the wheel-side motor and the transition flange.

3. The wheel drive assembly connection structure of claim 1, wherein The reducer is positioned by cooperation of the installation flange inner stop opening of the reducer and the flange outer edge surface (12) of the transition flange.

4. The wheel drive assembly connection structure of claim 1, wherein The wheel-side motor indirectly realizes the association with the rear axle housing through the transition flange, so as to form the complete decoupling of the wheel-side motor and the rear axle housing (4).

5. The wheel drive assembly connection structure of claim 1, wherein The transition flange and the rear axle housing (4) are connected through double-layer stop opening cooperation, and the corresponding hole positions of the transition flange and the rear axle housing (4) are fixed through the second mounting bolt (9).

6. The wheel drive assembly connection structure of claim 1, wherein The transition flange is uniformly provided with motor mounting holes (13) for mounting the wheel-side motor, and flange mounting holes (17) for connecting the second mounting bolt (9) and the rear axle housing (4).

7. The wheel drive assembly connection structure of claim 1, wherein During assembly of the wheel-side connecting assembly, the second mounting bolt (9) passes through the corresponding hole positions of the transition flange and the reducer, and is used for connecting the reducer and the transition flange; during separate disassembly of the reducer, the second mounting bolt (9) is installed in the corresponding hole positions on the transition flange and the rear axle housing (4), so as to realize the fixation of the transition flange and the rear axle housing (4).

8. The wheel drive assembly connection structure of claim 1, wherein In the conventional installation state, the reducer is connected with the rear axle housing (4) through the outer uniformly distributed reducer mounting holes (16) and the first mounting bolt (8); the reducer is further provided with a reducer top screw hole (15).

9. A method of disassembling the connection structure of the wheel drive assembly according to any one of claims 1 to 8, characterized by, Comprising the following steps: (1) Overall assembly: first, the wheel-side motor is positioned by cooperation of the motor outer edge surface (11) and the inner stop opening of the transition flange, and then the third mounting bolt (10) is used to pass through the motor mounting hole (13) for fixation; then, the reducer is positioned by cooperation of the installation flange inner stop opening and the flange outer edge surface (12) of the transition flange, and the second mounting bolt (9) is used for temporary fixation, so as to form a pre-assembly assembly of the wheel-side motor-transition flange-reducer; subsequently, the pre-assembly assembly is cooperated with the rear axle housing through the double-layer stop opening of the transition flange, and the first mounting bolt (8) is used to pass through the reducer mounting hole (16) for preliminary fixation; finally, the temporarily fixed second mounting bolt (9) is removed and is transferred into the corresponding hole positions of the transition flange and the rear axle housing (4), so as to complete the assembly of the decoupling of the wheel-side motor and the rear axle housing (4); (2) Separate disassembly of the speed reducer: only the first mounting bolt (8) is unscrewed, a jacking screw is screwed into the speed reducer jacking screw hole (15) of the speed reducer, the transition flange is pushed to separate the speed reducer and the transition flange, and the speed reducer can be taken out in the axial direction. At this time, the wheel hub motor and the transition flange are still fixed to the rear axle housing (4) through the second mounting bolt (9); (3) Integral disassembly of the assembly: the second mounting bolt (9) is unscrewed, the corresponding hole positions of the transition flange and the speed reducer are re-threaded and fixed, and the wheel hub motor-transition flange-speed reducer integral assembly is restored. Then the first mounting bolt (8) is unscrewed, a jacking screw is screwed into the reserved mounting hole (14) on the transition flange, the rear axle housing (4) is pushed to separate the double-layered stop of the transition flange and the rear axle housing (4), and the wheel hub motor-transition flange-speed reducer integral assembly is taken out in the axial direction.

10. An electrically driven bulldozer characterized by The electrically driven bulldozer is provided with the wheel hub driving assembly connecting structure according to any one of claims 1-8.

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