Wheel edge driving assembly and vehicle

Abstract

The invention relates to the technical field of wheel edge driving, and discloses a wheel edge driving assembly and a vehicle. The wheel edge driving assembly comprises a motor unit, a first transmission and a second transmission which are integrated together, and the central axis of a first driving motor assembly and the central axis of a second driving motor assembly in the motor unit are used for extending in the width direction of the vehicle. The first driving motor and the second driving motor share the same motor shell; a first output shaft of the first driving motor is in power transmission connection with a first input shaft of the first transmission; a second output shaft of the second driving motor is in power transmission connection with a second input shaft of the second transmission; a first output half shaft of the first transmission and a second output half shaft of the second transmission are arranged on the same half shaft central axis A. The half shaft central axis A is located in the cross section of a rotor of the first driving motor. The wheel edge driving assembly is integrated, the structure is compact, the size and the weight are small, and the cost is low.

Description

[0001] This application is a divisional application of the Chinese patent application submitted to the China Patent Office on November 30, 2020, with application number 202011378556.6 and invention name "Wheel-side drive assembly and vehicle". Technical Field

[0002] The invention relates to the technical field of wheel-side drive, and in particular to a wheel-side drive assembly and a vehicle. Background Art

[0003] With the development of vehicle technology, electric vehicles are becoming more and more popular. For example, the four-wheel independent drive system of electric vehicles uses four motors to independently drive the four wheels of the vehicle. The torque and speed of the four wheels can be accurately controlled independently of each other, which brings a series of advantages, such as achieving smaller radius turns, assisting ESP functions, assisting steering functions, assisting braking functions, etc.

[0004] Generally, a wheel-side drive solution is often used in a four-wheel independent drive system. In the existing wheel-side drive solution, the left and right drive assemblies are often self-contained, occupying a large space and having a high cost. Summary of the invention

[0005] The object of the present invention is to provide a wheel-side drive assembly which is integrated into one body, has a compact structure, high space utilization, small volume and weight, and low cost.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a wheel-side drive assembly, which includes an integrated motor unit, a first transmission and a second transmission, wherein the first transmission and the second transmission are respectively arranged on both sides of the motor unit in the vehicle width direction; the motor unit also includes a motor housing, a first drive motor assembly and a second drive motor assembly, wherein the first drive motor assembly and the second drive motor assembly are arranged in the motor housing and spaced apart in the vehicle length direction, and the motor assembly center axis of each of the first drive motor assembly and the second drive motor assembly is used to extend along the vehicle width direction to form a first drive motor and a second drive motor sharing the same motor housing; the first output shaft of the first drive motor is connected to the first input shaft of the first transmission for power transmission, and the second output shaft of the second drive motor is connected to the second input shaft of the second transmission for power transmission; a part of the side wall of one side of the motor housing serves as the inner side wall of the first transmission, and at least a part of the side wall of the other side of the motor housing serves as the inner side wall of the second transmission; wherein the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged with the half shaft center axis A, and the half shaft center axis A is located in the cross section of the rotor of the first drive motor.

[0007] In this technical solution, since the motor unit, the first transmission and the second transmission are integrated together, the first transmission and the second transmission are respectively arranged on both sides of the motor unit in the vehicle width direction. At the same time, the motor unit includes a first drive motor and a second drive motor which are integrated together and arranged in the vehicle length direction and whose respective motor center axes are used to extend along the vehicle width direction. In this way, the height of the motor unit in the vehicle height direction can be reduced. At the same time, the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged with the half shaft center axis A, and the half shaft center axis A is located in the cross-section of the rotor of the first drive motor. In this way, the power transmission structure in the first transmission can be compact and the length of the first transmission in the vehicle length direction can be reduced. At the same time, the first output half shaft and the second output half shaft are arranged close to the first drive motor to meet the vehicle layout requirements and avoid interference with the subframe or the body. Therefore, the wheel-side drive assembly is integrated into one, with compact structure, high space utilization, small volume and weight, and low cost.

[0008] Furthermore, the center axis A of the half shaft coincides with the motor center axis B of the first drive motor.

[0009] Furthermore, the first transmission includes a first intermediate shaft spaced apart from and arranged in parallel with the first input shaft in the vehicle length direction, and a first input gear provided on the first input shaft is meshed with a first intermediate gear provided on the first intermediate shaft.

[0010] Furthermore, the distance between the first input shaft and the first drive motor and the second drive motor is reduced so that the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor that is away from the second drive motor; the first input shaft is provided with a second input gear having a smaller diameter than the first input gear and replacing the first input gear, and the second input gear is meshed with the first intermediate gear.

[0011] In addition, optionally, the distance between the first drive motor and the second drive motor remains unchanged, and the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor that is away from the second drive motor.

[0012] In addition, a support member is provided in the first transmission, and both ends of the first input shaft are respectively supported on the support member and the inner side wall of the first transmission, and both ends of the first output half shaft are respectively supported on the support member and the outer side wall of the first transmission.

[0013] In addition, in the first transmission, the power transmission path from the first input shaft to the first output half shaft is a U-shaped transmission path; the U-shaped transmission path makes the length of the first transmission in the vehicle length direction smaller than the length of the second transmission in the vehicle length direction.

[0014] In addition, the first transmission includes a first intermediate shaft spaced apart from and arranged in parallel with the first input shaft in the length direction of the vehicle, and the first input shaft and the first output half shaft are located on the same side of the first intermediate shaft; the second transmission includes a second intermediate shaft spaced apart from the second input shaft in the length direction of the vehicle, and the second input shaft and the second output half shaft are located on both sides of the second intermediate shaft; wherein a first angle between a line connecting the axial center of the first input shaft and the axial center of the first intermediate shaft and a line connecting the axial center of the first output half shaft and the axial center of the first intermediate shaft is less than 90°; and a second angle between a line connecting the axial center of the second input shaft and the axial center of the second intermediate shaft and a line connecting the axial center of the second output half shaft and the axial center of the second intermediate shaft is greater than 90°.

[0015] In addition, a motor cooling water channel is arranged in the motor housing of the motor unit, and the motor cooling water channel includes a cooling water inlet and a cooling water outlet, wherein the motor cooling water channel starts from the cooling water inlet and is alternately wound on the first drive motor and the second drive motor and extends to the cooling water outlet.

[0016] Furthermore, the wheel-side drive assembly includes a flat electronic control unit, wherein in the height direction of the vehicle, the flat electronic control unit is fixedly connected to the top of the motor unit, the first transmission and the second transmission.

[0017] Furthermore, a motor cooling water channel is provided in the motor housing of the motor unit, and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit, wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected.

[0018] Furthermore, one of the motor unit and the flat electric control unit includes a copper bar, and the other of the flat electric control unit and the motor unit includes a copper bar connection end, and the copper bar connection end is connected to the copper bar, wherein the electric control housing of the flat electric control unit includes an openable maintenance cover located at the connection between the copper bar connection end and the copper bar.

[0019] Furthermore, the wheel-side drive assembly includes a rotating transformer and a temperature sensor, wherein the rotating transformer and the temperature sensor extend into the motor housing of the motor unit, and the connection lines between the rotating transformer and the temperature sensor and the flat electronic control unit are respectively blocked by the electronic control housing of the flat electronic control unit and the motor housing and do not leak out.

[0020] Finally, the present invention provides a vehicle, which is provided with any of the above-mentioned wheel-side drive assemblies, wherein one of the first output half shaft and the second output half shaft serves as a left output half shaft and the other serves as a right output half shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0022] Figure 2 is another schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0024] Figure 4 yes Figure 3 A schematic diagram of the disassembled structure of the flat electronic control unit and the motor unit of the wheel side drive assembly;

[0025] Figure 5 yes Figure 3 The exploded state diagram of the wheel side drive assembly;

[0026] Figure 6 It is a schematic diagram of a motor cooling water channel of a motor unit in a wheel side drive assembly provided in a specific embodiment of the present invention;

[0027] Figure 7 It is another schematic diagram of a motor cooling water channel of a motor unit in a wheel side drive assembly provided in a specific embodiment of the present invention;

[0028] Figure 8 It is another three-dimensional structural schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0029] Fig. 9 yes Figure 8 The exploded state diagram of the wheel side drive assembly;

[0030] Fig.10 yes Fig. 9 Schematic diagram of the disassembled structure of the flat electronic control unit and the motor unit of the wheel-side drive assembly.

[0031] Description of Reference Numerals

[0032] 1-first transmission, 2-second transmission, 3-motor unit, 4-first drive motor, 5-second drive motor, 6-first output shaft, 7-first input shaft, 8-second input shaft, 9-first output half shaft, 10-second output half shaft, 11-first intermediate shaft, 12-first input gear, 13-first intermediate gear, 14-second input gear, 15-support, 16-second intermediate shaft, 17-motor housing, 18-first drive motor assembly, 19-second drive motor assembly, 20-flat electronic control unit, 21-motor cooling water channel, 22-cooling water inlet, 23-cooling water outlet, 24-copper busbar, 25-maintenance cover. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0034] refer to Figure 1 and Figure 2 As shown in the two schematic structures, the wheel-side drive assembly provided by the present invention includes a motor unit 3, a first transmission 1 and a second transmission 2 which are integrated together, wherein the first transmission 1 and the second transmission 2 are respectively arranged on both sides of the motor unit 3 in the vehicle width direction; the motor unit 3 includes a first drive motor 4 and a second drive motor 5 which are integrated together and arranged in the vehicle length direction and transversely placed along the vehicle width direction, that is, the motor center axis of the first drive motor 4 and the second drive motor 5 are respectively used to extend along the vehicle width direction, the first output shaft 6 of the first drive motor 4 is connected to the first input shaft 7 of the first transmission 1 for power transmission, and the second output shaft of the second drive motor 5 is connected to the second input shaft 8 of the second transmission 2 for power transmission; wherein the first output half shaft 9 of the first transmission 1 and the second output half shaft 10 of the second transmission 2 are arranged with the half shaft center axis A, and the half shaft center axis A is located in the cross section of the rotor of the first drive motor 4.

[0035] Since the motor unit, the first transmission and the second transmission are integrated together, the first transmission and the second transmission are respectively arranged on both sides of the motor unit in the vehicle width direction. At the same time, the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the vehicle length direction and horizontally arranged along the vehicle width direction. In this way, the height of the motor unit in the vehicle height direction can be reduced. At the same time, the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged with the half shaft center axis A, and the half shaft center axis A is located in the cross-section of the rotor of the first drive motor. In this way, the power transmission structure in the first transmission can be compact and the length of the first transmission in the vehicle length direction can be reduced. At the same time, the first output half shaft and the second output half shaft are arranged close to the first drive motor to meet the vehicle layout requirements and avoid interference with the subframe or the body. Therefore, the wheel-side drive assembly is integrated into one, with compact structure, high space utilization, small volume and weight, and low cost.

[0036] In addition, the housings of the first drive motor 4 and the second drive motor 5 can be integrated, for example, welded together, or, as shown in FIG. Figure 1-Figure 5 As shown, the first drive motor 4 and the second drive motor 5 share the same motor housing, that is, the motor unit 3 includes a motor housing 17, a first drive motor assembly 18 and a second drive motor assembly 19, wherein the first drive motor assembly 18 and the second drive motor assembly 19 are arranged in the motor housing 17 and are arranged at intervals in the vehicle length direction and are transversely arranged along the vehicle width direction, that is, the motor assembly center axis of the first drive motor assembly 18 and the second drive motor assembly 19 are respectively used to extend along the vehicle width direction to form the first drive motor 4 and the second drive motor 5 that share the same motor housing 17, wherein the first drive motor assembly 18 forms the first drive motor 4, and the second drive motor assembly 19 forms the second drive motor 5, thus forming the first drive motor 4 and the second drive motor 5 integrated together, a part of the side wall of one side of the motor housing 17 is used as the inner side wall of the first transmission 1, and at least a part of the side wall of the other side of the motor housing 17 is used as the inner side wall of the second transmission 2. In this way, the motor housing 17 and the transmission can share the side wall, thereby further improving the integration of the wheel side drive assembly.

[0037] In addition, in the wheel-side drive assembly, the half-shaft center axis A can be located at any position within the cross section of the rotor of the first drive motor 4. For example, in one embodiment, the half-shaft center axis A can be located at the edge of the cross section of the rotor of the first drive motor 4. Alternatively, in another embodiment, refer to Figure 1, the half shaft center axis A coincides with the motor center axis B of the first drive motor 4. At this time, the first input shaft 7 and the first drive motor 4 are set to be in the first position. In this way, the power transmission structure in the first transmission can be made more compact, and the length of the first transmission in the vehicle length direction can be further reduced.

[0038] In addition, the first transmission 1 may have a power transmission mechanism, such as a plurality of gear sets or a worm gear set. Figure 1 The first transmission 1 includes a first intermediate shaft 11 which is spaced apart from and arranged in parallel with the first input shaft 7 in the length direction of the vehicle. The first input gear 12 provided on the first input shaft 7 is meshed with the first intermediate gear 13 provided on the first intermediate shaft 11. In this way, the rotation output by the first drive motor 4 drives the first intermediate shaft 11 to rotate through the meshing first input gear 12 and the first intermediate gear 13, and the first intermediate shaft 11 transmits the rotational force to the subsequent power transmission mechanism.

[0039] Further, refer to Figure 2 In other embodiments, the distance between the first input shaft 7 and the first drive motor 4 and the second drive motor 5 is reduced, that is, the first input shaft 7 and the first drive motor 4 are set at the second position closer to the second drive motor 5 than the first position, that is, the distance between the first drive motor 4 and the second drive motor 5 is shortened so that the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor 4 that is away from the second drive motor 5; at the same time, in the second position, the first input shaft 7 is provided with a second input gear 14 having a smaller diameter than the first input gear 12 and replacing the first input gear, and the second input gear 14 is meshed with the first intermediate gear 13. In this way, the diameter of the second input gear 14 can be further reduced, so that the structural size of the first transmission 1 is more compact.

[0040] In addition, in an alternative embodiment, reference Figure 2 , the distance between the first drive motor 4 and the second drive motor 5 remains unchanged, and the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor 4 that faces away from the second drive motor 5. In this way, the positions of the first output half-shaft 9 of the first transmission 1 and the second output half-shaft 10 of the second transmission 2 in the vehicle length direction can be adjusted accordingly according to the actual layout requirements of the wheel-side drive assembly on the vehicle model, so as to meet the layout of different vehicle models, meet the layout requirements of the entire vehicle, and avoid interference with the subframe or the vehicle body.

[0041] In addition, refer to Figure 1 and Figure 2A support member 15 is provided in the first transmission 1, and both ends of the first input shaft 7 are respectively supported on the support member 15 and the inner side wall of the first transmission 1, and both ends of the first output half shaft 9 are respectively supported on the support member 15 and the outer side wall of the first transmission. In this way, since the structure of the first transmission 1 is more compact, the first output half shaft 9 and the first input shaft 7 can be isolated and supported by the support member 15, thereby shortening the length of the first output half shaft 9 and the first input shaft 7 in the vehicle width direction, reducing the width of the first transmission in the vehicle width direction, and making the first transmission more compact.

[0042] In addition, refer to Figure 1 and 2 In the first transmission, the power transmission path from the first input shaft 7 to the first output half shaft 9 is a U-shaped transmission path; the U-shaped transmission path makes the length of the first transmission in the vehicle length direction smaller than the length of the second transmission in the vehicle length direction. In this way, the length of the first transmission in the vehicle length direction can be effectively reduced, making the first transmission more compact. At the same time, the U-shaped transmission path can make the power transmission mechanism in the first transmission more simplified and compact.

[0043] In addition, refer to Figure 1 and Figure 2 The first transmission 1 includes a first intermediate shaft 11 which is spaced apart from and arranged in parallel with the first input shaft 7 in the vehicle length direction, and the first input shaft 7 and the first output half shaft 9 are located on the same side of the first intermediate shaft 11, so that, for example, the power transmission path from the first input shaft 7 to the first output half shaft 9 can be a U-shaped transmission path. At the same time, the second transmission 2 includes a second intermediate shaft 16 which is spaced apart from the second input shaft 8 in the vehicle length direction, and the second input shaft 8 and the second output half shaft 10 are located on both sides of the second intermediate shaft 16; wherein, a first angle between a line connecting the axial center of the first input shaft 7 and the axial center of the first intermediate shaft 11 and a line connecting the axial center of the first output half shaft 9 and the axial center of the first intermediate shaft 11 is less than 90°, so that the width of the first transmission in the vehicle width direction can be further reduced; a second angle between a line connecting the axial center of the second input shaft 8 and the axial center of the second intermediate shaft 16 and a line connecting the axial center of the second output half shaft 10 and the axial center of the second intermediate shaft 16 is greater than 90°, and further 180°, so that the width of the second transmission in the vehicle width direction can be further reduced.

[0044] In addition, refer to Figure 6 and Figure 7As shown, a motor cooling water channel 21 is provided in the motor housing of the motor unit 3, and the motor cooling water channel 21 includes a cooling water inlet 22 and a cooling water outlet 23, wherein the motor cooling water channel 21 is alternately wound around the first drive motor 4 and the second drive motor 5 from the cooling water inlet and extends to the cooling water outlet 23. In this way, after the cooling water enters the motor cooling water channel 21 from the cooling water inlet 22, it will alternately flow through the first drive motor 4 and the second drive motor 5 in sequence, thereby ensuring that the first drive motor 4 and the second drive motor 5 can be cooled to the same extent, and improving the balance of heat dissipation.

[0045] In addition, the same motor housing shared by the first drive motor 4 and the second drive motor 5 is easier to be provided with such a motor cooling water channel 21 .

[0046] Of course, optionally, the cooling water channels on the respective shells of the first drive motor 4 and the second drive motor 5 can also be connected alternately in sequence, so that the formed motor cooling water channel 21 starts from the cooling water inlet and alternately winds on the first drive motor 4 and the second drive motor 5 to extend to the cooling water outlet 23.

[0047] The motor cooling water channel 21 starts from the cooling water inlet and is alternately wound around the first drive motor 4 and the second drive motor 5 and extends to the cooling water outlet 23. There are many ways to do this, for example, Figure 6 In the manner, the motor cooling water channel 21 is wound around the first drive motor 4 (for example, the first drive motor assembly 18) once, then wound around the second drive motor 5 (for example, the second drive motor assembly 19) in the middle of the two drive motors, and then wound around the first drive motor 4 in the middle of the two drive motors, and the winding is alternated in sequence. Figure 7 In the method, the motor cooling water channel 21 is wound around the first drive motor 4 to the upper part in the middle of the two drive motors, then axially bends and returns to be wound around the first drive motor 4 to the lower part in the middle of the two drive motors, and then is wound around the second drive motor 5 to the upper part in the middle of the two drive motors, then axially bends and returns to be wound around the second drive motor 5 to the lower part in the middle of the two drive motors, and then is wound around the first drive motor 4, and the windings are alternately performed in sequence.

[0048] Further, the cooling water inlet 22 and the cooling water outlet 23 of the motor cooling water channel 21 are formed at a middle position between the first drive motor 4 and the second drive motor 5 .

[0049] In addition, refer to Figure 3 , Figure 4 and Figure 5The wheel side drive assembly includes a flat electric control unit 20, wherein in the vehicle height direction, the flat electric control unit 20 is fixedly connected to the top of the motor unit 3, the first transmission 1 and the second transmission 2. Thus, by adopting the flat electric control unit 20, the height of the wheel side drive assembly in the vehicle height direction can be reduced, and at the same time, the electric control unit, the motor unit and the transmission of the wheel side drive assembly can be more integrated.

[0050] In addition, a motor cooling water channel is provided in the motor housing of the motor unit 3, and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit 20, wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected. For example, the electric control cooling water channel can be provided with a total water inlet, so that the cooling water enters the electric control cooling water channel from the total water inlet to cool the flat electric control unit 20. Since the flat shape of the flat electric control unit 20 can increase the heat dissipation area, and at the same time, the heat dissipation of the flat electric control unit 20 is small, the temperature of the cooling water will basically not rise, so it can continue to flow into the motor cooling water channel to cool the two drive motors alternately in sequence. The cooling water can be directly discharged from the cooling water outlet 23 of the motor unit 3.

[0051] Alternatively, optionally, when the flat electronic control unit 20 includes a total water outlet, the cooling water discharged from the cooling water outlet 23 can be discharged from the total water outlet of the flat electronic control unit 20, so that the flat electronic control unit 20 can be conveniently assembled on the motor unit 3 without avoiding the cooling water outlet 23.

[0052] In addition, in one embodiment, reference Figure 4 and Figure 5 An embodiment shown and Figure 8-Figure 10 In another embodiment shown, one of the motor unit 3 and the flat electric control unit 20 includes a copper bar 24, and the other of the motor unit 3 and the flat electric control unit 20 includes a copper bar connection end, and the copper bar connection end is connected to the copper bar 24, wherein the electric control housing of the flat electric control unit 20 includes an openable maintenance cover 25 located at the connection between the copper bar connection end and the copper bar 24. In this way, through the connection between the copper bar connection end and the copper bar 24, the three-phase electrical connection between the motor unit 3 and the flat electric control unit 20 can be conveniently achieved, making the wheel-side drive assembly more integrated. Furthermore, after the motor unit 3 and the flat electric control unit 20 are connected, the housing of the motor unit 3 and the housing of the flat electric control unit 20 will shield the copper bar connection end and the copper bar 24 from leaking out, which can help meet the protection requirements.

[0053] In addition, in one embodiment, the wheel-side drive assembly includes a rotating transformer and a temperature sensor, wherein the rotating transformer and the temperature sensor extend into the motor housing of the motor unit 3, and the connection lines between the rotating transformer and the temperature sensor and the flat electric control unit 20 are respectively blocked by the electric control housing and the motor housing of the flat electric control unit 20 and do not leak out. That is, after the flat electric control unit 20 and the motor unit 20 are connected, the connection lines between the rotating transformer and the temperature sensor and the flat electric control unit 20 are respectively blocked, which can help meet the protection requirements.

[0054] Finally, the present invention provides a vehicle, which is provided with any of the above-mentioned wheel-side drive assemblies, wherein one of the first output half shaft 9 and the second output half shaft 10 is used as a left output half shaft and the other is used as a right output half shaft. The left output half shaft and the right output half shaft are respectively connected to the left wheel and the right wheel of the vehicle for power transmission. In this way, the overall quality of the vehicle is effectively improved.

[0055] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0057] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A wheel drive assembly, characterized in that: The invention comprises an integrated motor unit (3), a first transmission (1) and a second transmission (2), wherein: The first transmission (1) and the second transmission (2) are respectively arranged on both sides of the motor unit (3) in the vehicle width direction; The motor unit (3) comprises a motor housing (17), a first drive motor assembly (18) and a second drive motor assembly (19), wherein: The first drive motor assembly (18) and the second drive motor assembly (19) are disposed in the motor housing (17) and are spaced apart in the length direction of the vehicle, and the motor assembly center axes of the first drive motor assembly (18) and the second drive motor assembly (19) are respectively used to extend in the width direction of the vehicle to form a first drive motor (4) and a second drive motor (5) that share the same motor housing (17); The first output shaft (6) of the first drive motor (4) is connected to the first input shaft (7) of the first transmission (1) for power transmission, and the second output shaft of the second drive motor (5) is connected to the second input shaft (8) of the second transmission (2) for power transmission; a portion of a side wall of one side of the motor housing (17) serves as an inner side wall of the first transmission (1), and at least a portion of a side wall of the other side of the motor housing (17) serves as an inner side wall of the second transmission (2); The first output half shaft (9) of the first transmission (1) and the second output half shaft (10) of the second transmission (2) are arranged with the half shaft center axis A, and the half shaft center axis A is located within the cross section of the rotor of the first drive motor (4).

2. The wheel side drive assembly according to claim 1, characterized in that: The center axis A of the half shaft coincides with the center axis B of the motor of the first drive motor (4).

3. The wheel side drive assembly according to claim 2, characterized in that: The first transmission (1) comprises a first intermediate shaft (11) which is spaced apart from and arranged in parallel with the first input shaft (7) in the vehicle length direction, and a first input gear (12) arranged on the first input shaft (7) is meshed with a first intermediate gear (13) arranged on the first intermediate shaft (11).

4. The wheel side drive assembly according to claim 3, characterized in that: The distance between the first input shaft (7) and the first drive motor (4) and the second drive motor (5) is reduced so that the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor (4) facing away from the second drive motor (5); The first input shaft (7) is provided with a second input gear (14) having a smaller diameter than the first input gear (12) and replacing the first input gear, and the second input gear (14) is meshed with the first intermediate gear (13).

5. The wheel side drive assembly according to claim 1, characterized in that: The distance between the first drive motor (4) and the second drive motor (5) remains unchanged, and the half-shaft center axis A is located on the side of the motor center axis B of the first drive motor (4) facing away from the second drive motor (5).

6. The wheel side drive assembly according to claim 1, characterized in that: A support member (15) is provided in the first transmission (1), two ends of the first input shaft (7) are respectively supported on the support member (15) and the inner side wall of the first transmission, and two ends of the first output half shaft (9) are respectively supported on the support member (15) and the outer side wall of the first transmission.

7. The wheel drive assembly according to claim 1, characterized in that: In the first transmission, the power transmission path from the first input shaft (7) to the first output half shaft (9) is a U-shaped transmission path; The U-shaped transmission path makes the length of the first transmission in the vehicle length direction smaller than the length of the second transmission in the vehicle length direction.

8. The wheel side drive assembly according to claim 1, characterized in that: The first transmission (1) comprises a first intermediate shaft (11) which is spaced apart from and arranged in parallel with the first input shaft (7) in the vehicle length direction, and the first input shaft (7) and the first output half shaft (9) are located on the same side of the first intermediate shaft (11); The second transmission (2) comprises a second intermediate shaft (16) arranged at an interval from the second input shaft (8) in the vehicle length direction, and the second input shaft (8) and the second output half shaft (10) are located on both sides of the second intermediate shaft (16); wherein a first angle between a line connecting the axial center of the first input shaft (7) and the axial center of the first intermediate shaft (11) and a line connecting the axial center of the first output half shaft (9) and the axial center of the first intermediate shaft (11) is less than 90°; A second angle between a line connecting the axial center of the second input shaft (8) and the axial center of the second intermediate shaft (16) and a line connecting the axial center of the second output half shaft (10) and the axial center of the second intermediate shaft (16) is greater than 90°.

9. The wheel side drive assembly according to claim 1, characterized in that: A motor cooling water channel (21) is provided in the motor housing of the motor unit (3), and the motor cooling water channel (21) comprises a cooling water inlet (22) and a cooling water outlet (23), wherein the motor cooling water channel (21) starts from the cooling water inlet and is alternately wound on the first drive motor (4) and the second drive motor (5) and extends to the cooling water outlet (23).

10. The wheel drive assembly according to any one of claims 1 to 9, characterized in that: The wheel-side drive assembly comprises a flat electronic control unit (20), wherein in the vehicle height direction, the flat electronic control unit (20) is fixedly connected to the top of the motor unit (3), the first transmission (1) and the second transmission (2).

11. The wheel side drive assembly according to claim 10, characterized in that: A motor cooling water channel is provided in the motor housing of the motor unit (3), and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit (20), wherein the motor cooling water channel and the electric control cooling water channel are sealed and connected.

12. The wheel drive assembly according to claim 10, characterized in that: One of the motor unit (3) and the flat electric control unit (20) comprises a copper bar (24), and the other of the motor unit (3) and the flat electric control unit (20) comprises a copper bar connection end, wherein the copper bar connection end is connected to the copper bar (24), wherein the electric control housing of the flat electric control unit (20) comprises an openable maintenance cover (25) located at the connection between the copper bar connection end and the copper bar (24).

13. The wheel drive assembly according to claim 10, characterized in that: The wheel-side drive assembly comprises a rotary transformer and a temperature sensor, wherein the rotary transformer and the temperature sensor extend into the motor housing of the motor unit (3), and the connection lines between the rotary transformer and the temperature sensor and the flat electric control unit (20) are shielded by the electric control housing of the flat electric control unit (20) and the motor housing and do not leak out.

14. A vehicle, characterized in that: The vehicle is provided with a wheel-side drive assembly as described in any one of claims 1 to 13, wherein one of the first output half shaft (9) and the second output half shaft (10) serves as a left output half shaft and the other serves as a right output half shaft.

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