Wheel drive assembly and vehicle

Abstract

The present invention relates to the technical field of wheel-side drive, and discloses a wheel-side drive assembly and a vehicle. The wheel-side drive assembly includes an integrated motor unit and a transmission unit, wherein the transmission unit is arranged on one side of the motor unit in the vehicle width direction, and the motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the vehicle length direction; the transmission unit includes a transmission housing, a first speed change mechanism and a second speed change mechanism, wherein the first speed change mechanism includes a first input shaft, a first intermediate shaft and a first input gear set, and the second speed change mechanism includes a second input shaft, a second intermediate shaft and a second input gear set, and the first input gear set is arranged between the second input gear set and the motor unit; the first output half shaft of the first speed change mechanism and the second output half shaft of the second speed change mechanism are arranged coaxially with the half shaft center axis A. The wheel-side drive assembly is integrated into one body, has a compact structure, high space utilization, small volume and weight, and low cost.

Description

Technical Field

[0001] 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

[0002] 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.

[0003] 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

[0004] 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.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a wheel-side drive assembly, which includes an integrated motor unit and a transmission unit, and the transmission unit is arranged on one side of the motor unit in the vehicle width direction, wherein 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 the motor center axis of each of the first drive motor and the second drive motor is used to extend along the vehicle width direction; the transmission unit includes a transmission housing, a first speed change mechanism and a second speed change mechanism arranged in the transmission housing, wherein the first speed change mechanism includes a first input shaft connected to the first drive motor for power transmission, a first intermediate shaft, and a first input gear set connected to the first input shaft and the first intermediate shaft, and the second speed change mechanism includes a second input shaft connected to the second drive motor for power transmission, a second intermediate shaft, and a second input gear set connected to the second input shaft and the second intermediate shaft, wherein the first input gear set is arranged between the second input gear set and the motor unit; the first output half shaft of the first speed change mechanism and the second output half shaft of the second speed change mechanism are arranged with the half shaft center axis A.

[0006] In this technical solution, since the motor unit and the transmission unit are integrated together, the motor unit includes a first drive motor and a second drive motor which are integrated together and arranged in the length direction of the vehicle and horizontally placed in the width direction of the vehicle. In this way, the first drive motor and the second drive motor can adopt slender drive motors with small core diameter and long length, so that the two drive motors are arranged in parallel in the length direction of the vehicle. This makes full use of the space in the length direction of the vehicle (X direction) and reduces the space occupied by the wheel-side drive assembly in the height direction of the vehicle (Z direction), thereby providing Z-direction installation space for the subsequent installation of the electronic control unit. At the same time, the transmission unit is arranged on one side of the motor unit in the width direction of the vehicle to make full use of the space in the width direction of the vehicle (Y direction), so that the overall structure of the wheel-side drive assembly is compact and the space utilization rate is high, thereby realizing a high degree of integration of the wheel-side drive assembly. Therefore, the wheel-side drive assembly has a compact structure, high space utilization rate, small volume and weight, and low cost.

[0007] Further, the second intermediate shaft is an intermediate hollow shaft, the first intermediate shaft passes through the intermediate hollow shaft, and the first input driven gear of the first input gear set is located between the second input driven gear of the second input gear set and the motor unit.

[0008] Furthermore, the first transmission mechanism includes a first output gear set, a first output driving gear of the first output gear set is arranged on the shaft section of the first intermediate shaft passing through the intermediate hollow shaft, and a first output driven gear of the first output gear set is arranged on the first output half shaft.

[0009] Furthermore, the second speed change mechanism comprises a second output gear set, the second output driving gear of the second output gear set is arranged on the intermediate hollow shaft, and the second output driven gear of the second output gear set is arranged on the second output half shaft.

[0010] Further, the second input shaft is an input hollow shaft, the second input driving gear of the second input gear set is arranged on the input hollow shaft, and the second output half shaft passes through the input hollow shaft.

[0011] Furthermore, the central axis of the second drive motor is formed with an axial channel, and the second output half shaft passes through the axial channel.

[0012] Further, 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 greater than 90°; 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 less than 90°.

[0013] Furthermore, the motor unit 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 disposed in the motor housing and are spaced apart in the length direction of the vehicle, and the motor assembly center axes of the first drive motor assembly and the second drive motor assembly are respectively used to extend along the width direction of the vehicle to form the first drive motor and the second drive motor sharing the same motor housing; at least a portion of the side wall of one side of the motor housing serves as the inner side wall of the transmission housing.

[0014] Furthermore, a motor cooling water channel is provided 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.

[0015] In addition, 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 and the transmission housing.

[0016] 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.

[0017] Furthermore, one of the motor unit and the flat electric control unit includes a copper bar, and the other of the motor unit and the flat electric control 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.

[0018] 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.

[0019] 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

[0020] Figure 1 It is a schematic diagram of a wheel side drive assembly provided in a specific embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a disassembled flat electric control unit and a motor unit in a structure of a wheel side drive assembly provided by a specific embodiment of the present invention;

[0022] Figure 3 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;

[0023] Figure 4 It is another schematic diagram of the motor cooling water channel of the motor unit in the wheel-side drive assembly provided in the specific embodiment of the present invention.

[0024] Description of Reference Numerals

[0025] 1-first speed change mechanism, 2-second speed change mechanism, 3-motor unit, 4-first drive motor, 5-second drive motor, 6-transmission housing, 7-first input shaft, 8-first intermediate shaft, 9-second input shaft, 10-second intermediate shaft, 11-first input gear set, 12-second input gear set, 13-first output half shaft, 14-second output half shaft, 15-first input driven gear, 16-second input driven gear, 17-motor housing, 18-first output driving gear, 19-first output driven gear, 20-flat electronic control unit, 21-motor cooling water channel, 22-cooling water inlet, 23-cooling water outlet, 24-copper bar, 25-maintenance cover, 26-second output driving gear, 27-second output driven gear, 28-second input driving gear, 29-axial channel, 30-first drive motor assembly, 31-second drive motor assembly. DETAILED DESCRIPTION

[0026] 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.

[0027] refer to Figure 1 and Figure 2The two schematic structures shown in the figure, the wheel side drive assembly provided by the present invention includes a motor unit 3 and a transmission unit integrated together, the transmission unit is arranged on one side of the motor unit in the vehicle width direction, wherein the motor unit includes a first drive motor 4 and a second drive motor 5 that are integrated together and arranged in the vehicle length direction, the first drive motor 4 and the second drive motor 5 are transversely arranged along the vehicle width direction, that is, the motor center axis of each of the first drive motor 4 and the second drive motor 5 is used to extend along the vehicle width direction; the transmission unit includes a transmission housing 6, a first speed change mechanism 1 and a second speed change mechanism 2 arranged in the transmission housing, Among them, the first speed change mechanism 1 includes a first input shaft 7 connected to the first drive motor 4 for power transmission, a first intermediate shaft 8, and a first input gear set 11 connected to the first input shaft 7 and the first intermediate shaft 8; the second speed change mechanism 2 includes a second input shaft 9 connected to the second drive motor 5 for power transmission, a second intermediate shaft 10, and a second input gear set 12 connected to the second input shaft 9 and the second intermediate shaft 10, wherein the first input gear set 11 is arranged between the second input gear set 12 and the motor unit 3; the first output half shaft 13 of the first speed change mechanism 1 and the second output half shaft 14 of the second speed change mechanism 2 are arranged on the same half shaft center axis A.

[0028] Since the motor unit and the transmission unit are integrated together, the motor unit includes a first drive motor and a second drive motor which are integrated together and arranged in the length direction of the vehicle and horizontally arranged along the width direction of the vehicle. In this way, the first drive motor and the second drive motor can adopt slender drive motors with small core diameter and long length, so that the two drive motors are arranged in parallel in the length direction of the vehicle, which makes full use of the space in the length direction of the vehicle (X direction) and reduces the space occupied by the wheel-side drive assembly in the height direction of the vehicle (Z direction), thereby providing Z-direction installation space for the subsequent installation of the electronic control unit. At the same time, the transmission unit is arranged on one side of the motor unit in the width direction of the vehicle to make full use of the space in the width direction of the vehicle (Y direction). At the same time, since the first input gear set is arranged between the second input gear set and the motor unit, the Y-direction dimension of the wheel-side drive assembly can be reduced, so that the overall structure of the wheel-side drive assembly is compact and the space utilization rate is high, thereby realizing a high degree of integration of the wheel-side drive assembly. Therefore, the wheel-side drive assembly has a compact structure, high space utilization rate, small volume and weight, and low cost.

[0029] In addition, Figure 1 In the embodiment, the first transmission mechanism 1 and the second transmission mechanism 2 in the transmission housing 6 are arranged in this way, so that the transmission housing 6 can be Figure 1The portion shown in the dotted box forms a vacant area. If necessary, the shell portion of the transmission housing 6 located in the vacant area can be removed to form an avoidance space in this area of ​​the transmission housing 6. Other accessories of the wheel-side drive assembly can be arranged in the avoidance space, or when the wheel-side drive assembly is actually installed, the avoidance space can accommodate a part of the structure or accessories of the vehicle body.

[0030] In the wheel-side drive assembly, the second intermediate shaft 10 can be a solid shaft. In this case, the power transmission structure between the first output half shaft 13 of the first transmission mechanism 1 and the first intermediate shaft 8 can include other structures such as other gear sets or worm gear sets.

[0031] Optionally, refer to Figure 1 The second intermediate shaft 10 is an intermediate hollow shaft, so that the first intermediate shaft 8 can pass through the intermediate hollow shaft, so that a power transmission structure can be arranged between the shaft section of the first intermediate shaft 8 passing through the intermediate hollow shaft and the first output half shaft 13, and at the same time, the first input driven gear 15 of the first input gear set 11 is located between the second input driven gear 16 of the second input gear set 12 and the motor unit 3. In this way, the structure of the transmission unit can be made more compact.

[0032] In addition, refer to Figure 1 The power transmission structure arranged between the shaft section of the first intermediate shaft 8 passing through the intermediate hollow shaft and the first output half shaft 13 can be a plurality of gear sets, or the power transmission structure arranged between the shaft section of the first intermediate shaft 8 passing through the intermediate hollow shaft and the first output half shaft 13 can be a group of gear sets, that is, the first speed change mechanism 1 includes a first output gear set, the first output driving gear 18 of the first output gear set is arranged on the shaft section of the first intermediate shaft 8 passing through the intermediate hollow shaft, and the first output driven gear 19 of the first output gear set is arranged on the first output half shaft 13. In this way, referring to Figure 1 The first speed change mechanism 1 can realize power transmission output through two sets of gear sets, thereby making the structure of the transmission unit more compact, reducing weight and cost.

[0033] In addition, in the second transmission mechanism 2, the power transmission mechanism between the second intermediate shaft 10 and the second output half shaft 14 may include a plurality of gear sets, or the power transmission mechanism between the second intermediate shaft 10 and the second output half shaft 14 may include a single gear set, that is, Figure 1 The second speed change mechanism 2 includes a second output gear set, a second output driving gear 26 of the second output gear set is arranged on the middle hollow shaft, and a second output driven gear 27 of the second output gear set is arranged on the second output half shaft 14. Figure 1The second transmission mechanism 2 can also realize power transmission output through two sets of gear sets, thereby making the structure of the transmission unit more compact, reducing weight and cost.

[0034] In addition, in the wheel side drive assembly, the second input shaft 9 can be a solid shaft. Figure 1 The second input shaft 9 is an input hollow shaft, the second input driving gear 28 of the second input gear set is arranged on the input hollow shaft, and the second output half shaft 14 passes through the input hollow shaft. Figure 1 In the embodiment, the first speed change mechanism 1 can transmit power to the first output half shaft 13 through a set of first output gear sets, and the second speed change mechanism 2 can transmit power to the second output half shaft 14 through a set of second output gear sets. At the same time, the diameters of the second output driving gear 26 and the second output driven gear 27 as well as the first output driving gear 18 and the first output driven gear 19 are reduced, so as to make the structure of the transmission unit more compact.

[0035] In addition, in one embodiment, another gear set may be provided between the central axis of the second drive motor 5 and the second input shaft 9. Alternatively, in another embodiment, referring to Figure 1 The central shaft of the second drive motor 5 is formed with an axial channel 29, and the second output half shaft 14 passes through the axial channel 29, so that the central shaft and the second input shaft 9 can be directly connected, thereby making the structure of the transmission unit more compact.

[0036] In one embodiment, the second input shaft 9 is an input hollow shaft, the second input driving gear 28 of the second input gear set is arranged on the input hollow shaft, the second output half shaft 14 passes through the input hollow shaft, and at the same time, the central shaft of the second drive motor 5 is formed with an axial channel 29, the second output half shaft 14 passes through the axial channel 29, and the central shaft and the second input shaft 9 are directly connected.

[0037] In addition, refer to Figure 1The first angle between the line connecting the axial center of the first input shaft 7 and the axial center of the first intermediate shaft 8 and the line connecting the axial center of the first output half shaft 13 and the axial center of the first intermediate shaft 8 is greater than 90°, and the first angle can be any value greater than 90°, such as the first angle is 135°-180°, which can further reduce the width of the transmission unit in the vehicle width direction; the second angle between the line connecting the axial center of the second input shaft 9 and the axial center of the second intermediate shaft 10 and the line connecting the axial center of the second output half shaft 14 and the axial center of the second intermediate shaft 10 is less than 90°, and the second angle can be any value less than 90°, such as the second angle is 15°-45°, which can further reduce the width of the transmission unit in the vehicle width direction, make the transmission unit and the motor unit more compact, and further reduce the width dimension of the wheel-side drive assembly.

[0038] 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 As shown, the first drive motor 4 and the second drive motor 5 share the same motor housing, that is, the motor unit includes a motor housing 17, a first drive motor assembly 30 and a second drive motor assembly 31, wherein the first drive motor assembly 30 and the second drive motor assembly 31 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 each of the first drive motor assembly 30 and the second drive motor assembly 31 is 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, thus forming the first drive motor 4 and the second drive motor 5 integrated together, and at least a part of the side wall of one side of the motor housing 17 serves as the inner side wall of the transmission housing 6. In this way, the side wall can be shared between the motor housing 17 and the transmission, thereby further improving the integration of the wheel-side drive assembly.

[0039] In addition, refer to Figure 3 and Figure 4 As 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.

[0040] 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 .

[0041] 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.

[0042] 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 3 In the manner, the motor cooling water channel 21 is wound around the first drive motor 4 (for example, the first drive motor assembly 30) once, then wound around the second drive motor 5 (for example, the second drive motor assembly 31) 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 4 In the manner, 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.

[0043] 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 .

[0044] In addition, refer to Figure 2 The wheel side drive assembly includes a flat electric control unit 20, wherein the flat electric control unit 20 is fixedly connected to the top of the motor unit 3 and the transmission housing 6 in the vehicle height direction. 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.

[0045] 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 formed 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.

[0046] 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.

[0047] In addition, in one embodiment, reference Figure 2 , 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.

[0048] 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.

[0049] 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 13 and the second output half shaft 14 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.

[0050] 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.

[0051] 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. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] 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 a motor unit (3) and a transmission unit which are integrated together, wherein the transmission unit is arranged on one side of the motor unit in the vehicle width direction, wherein: The motor unit (3) comprises a first drive motor (4) and a second drive motor (5) which are integrated together and arranged in the vehicle length direction, wherein the motor center axis of each of the first drive motor (4) and the second drive motor (5) is used to extend in the vehicle width direction; The transmission unit comprises a transmission housing (6), a first speed change mechanism (1) and a second speed change mechanism (2) arranged in the transmission housing, wherein the first speed change mechanism (1) comprises a first input shaft (7) connected to the first drive motor (4) for power transmission, a first intermediate shaft (8) and a first input gear set (11) connected to the first input shaft (7) and the first intermediate shaft (8), and the second speed change mechanism (2) comprises a second input shaft (9) connected to the second drive motor (5) for power transmission, a second intermediate shaft (10) and a second input gear set (12) connected to the second input shaft (9) and the second intermediate shaft (10), wherein the first intermediate shaft (8) and the second intermediate shaft (10) are located between the first input shaft (7) and the second input shaft (9), and the first input gear set (11) is arranged between the second input gear set (12) and the motor unit (3); The first output half shaft (13) of the first speed change mechanism (1) and the second output half shaft (14) of the second speed change mechanism (2) are arranged coextensive with a half shaft central axis A; The second intermediate shaft (10) is an intermediate hollow shaft, the first intermediate shaft (8) passes through the intermediate hollow shaft, and the first input driven gear (15) of the first input gear set (11) is located between the second input driven gear (16) of the second input gear set (12) and the motor unit (3); The second input shaft (9) is an input hollow shaft, the second input driving gear (28) of the second input gear set is arranged on the input hollow shaft, and the second output half shaft (14) passes through the input hollow shaft.

2. The wheel side drive assembly according to claim 1, characterized in that: The first speed change mechanism (1) comprises a first output gear set, wherein a first output driving gear (18) of the first output gear set is arranged on a shaft section of the first intermediate shaft (8) passing through the intermediate hollow shaft, and a first output driven gear (19) of the first output gear set is arranged on the first output half shaft (13).

3. The wheel side drive assembly according to claim 1, characterized in that: The second speed change mechanism (2) comprises a second output gear set, a second output driving gear (26) of the second output gear set is arranged on the intermediate hollow shaft, and a second output driven gear (27) of the second output gear set is arranged on the second output half shaft (14).

4. The wheel side drive assembly according to claim 1, characterized in that: The central axis of the second drive motor (5) is formed with an axial channel (29), and the second output half shaft (14) passes through the axial channel (29).

5. The wheel side drive assembly according to claim 1, characterized in that: 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 (8) and a line connecting the axial center of the first output half shaft (13) and the axial center of the first intermediate shaft (8) is greater than 90°; A second angle between a line connecting the axial center of the second input shaft (9) and the axial center of the second intermediate shaft (10) and a line connecting the axial center of the second output half shaft (14) and the axial center of the second intermediate shaft (10) is less than 90°.

6. The wheel side drive assembly according to claim 1, characterized in that: The motor unit comprises a motor housing (17), a first drive motor assembly (30) and a second drive motor assembly (31), wherein: The first drive motor assembly (30) and the second drive motor assembly (31) 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 (30) and the second drive motor assembly (31) are respectively used to extend in the width direction of the vehicle, so as to form the first drive motor (4) and the second drive motor (5) that share the same motor housing (17); At least a portion of a side wall of one side of the motor housing (17) serves as an inner side wall of the transmission housing (6).

7. The wheel 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 around the first drive motor (4) and the second drive motor (5) and extends to the cooling water outlet (23).

8. The wheel drive assembly according to any one of claims 1 to 7, characterized in that: The wheel side drive assembly comprises 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) and the transmission housing (6).

9. The wheel side drive assembly according to claim 8, 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.

10. The wheel side drive assembly according to claim 8, characterized in that: One of the motor unit (3) and the flat electric control unit (20) comprises a copper busbar (24), and the other of the motor unit (3) and the flat electric control unit (20) comprises a copper busbar connection end, wherein the copper busbar connection end is connected to the copper busbar (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 busbar connection end and the copper busbar (24).

11. The wheel side drive assembly according to claim 8, 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 a motor housing of the motor unit (3), and the connection wires 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.

12. A vehicle, characterized in that: The vehicle is provided with a wheel-side drive assembly according to any one of claims 1 to 11, wherein one of the first output half shaft (13) and the second output half shaft (14) serves as a left output half shaft and the other serves as a right output half shaft.

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