Drive assembly, four-wheel drive system and vehicle

Abstract

The utility model provides a kind of drive assembly, four-wheel drive system and vehicle, it is related to vehicle technical field.Drive assembly includes at least one drive component;Drive component includes first motor, first planetary reducer, first reducer and first gear shift device, first planetary reducer includes first sun gear, first planet carrier and multiple first planetary gears, multiple first planetary gears are installed to first planet carrier, and with first sun gear meshing, first sun gear is drivingly connected with first motor, first gear shift device has first reduction mode and first direct drive mode, first gear shift device is configured to drive connection first planet carrier and first reducer in first reduction mode, drive connection first sun gear and first reducer in first direct drive mode.This drive assembly can improve the climbing ability of vehicle when vehicle climbs, and can reduce space occupation, improve the space utilization of vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a drive assembly, a four-wheel drive system, and a vehicle. Background Technology

[0002] In related technologies, the drive assembly includes multiple transmission gears with parallel drive shafts. These gears mesh sequentially in pairs, achieving multi-stage speed reduction from the input to the output of the gears to increase torque before transmitting power to the wheels. However, using multiple parallel drive shafts to achieve speed reduction and torque increase is ineffective and results in a bulky assembly that occupies excessive vehicle space. Furthermore, the drive assembly has relatively low torque, requiring the motor to maintain peak speed for extended periods during climbing maneuvers, which can easily damage the motor and cause hazards. Utility Model Content

[0003] In view of the above problems, the present invention provides a drive assembly that can improve the vehicle's climbing ability when climbing, and can reduce space occupation and improve the space utilization of the vehicle.

[0004] In a first aspect, according to the drive assembly of the present application embodiment, the drive assembly includes at least one drive component; the drive component includes a first motor, a first planetary reducer, a first reducer and a first shifting device, the first planetary reducer includes a first sun gear, a first planet carrier and a plurality of first planet gears, the plurality of first planet gears are mounted on the first planet carrier and mesh with the first sun gear, the first sun gear is drivenly connected to the first motor, the first shifting device has a first deceleration mode and a first direct drive mode, the first shifting device is configured to drively connect the first planet carrier and the first reducer in the first deceleration mode, and drively connect the first sun gear and the first reducer in the first direct drive mode.

[0005] According to the drive assembly of the present application embodiment, the connection state between the first planetary reducer and the first reducer can be changed by the first shifting device; when the vehicle is in off-road condition, the first shifting device can switch to the first deceleration mode to increase the torque output of the drive assembly, thereby improving the vehicle's climbing ability; when the vehicle is not in off-road condition, the first shifting device can switch to the first direct drive mode, at which time the power is directly output from the first motor through the first reducer, the first planetary reducer does not reduce torque, there is no gear wear, power loss is reduced, and vehicle quietness is improved.

[0006] In some embodiments, the first shifting device includes a first transmission frame, a first coupling member, and a first transmission gear. The first transmission frame is connected to a first reducer, the first coupling member is slidably disposed on the first transmission frame, and the first transmission gear is connected to a first sun gear. The first coupling member has a first position and a second position. When the first coupling member is in the first position, the first shifting device is in the first deceleration mode, and the first coupling member is drivingly connected to the first planetary carrier and the first transmission carrier. When the first coupling member is in the second position, the first shifting device is in the first direct drive mode, and the first coupling member is drivingly connected to the first transmission gear and the first transmission carrier.

[0007] In the above embodiments, the first coupling member selectively connects the first planetary carrier and the first sun gear to meet the vehicle's climbing and off-road requirements and its normal driving requirements.

[0008] In some embodiments, the first planetary reducer further includes a first central shaft, and the first transmission gear and the first sun gear are both disposed on the first central shaft and are connected by transmission through the first central shaft.

[0009] In the above embodiments, power can be output from the first motor and transmitted along the first sun gear, the first central shaft and the first transmission gear. In the first direct drive mode, power can be directly output, reducing power loss and improving the working efficiency of the drive assembly.

[0010] In some embodiments, the first reducer includes a first input shaft, a first transmission shaft, a first output shaft, a first gear transmission assembly, and a second gear transmission assembly. The first input shaft, the first transmission shaft, and the first output shaft are arranged in parallel. The first input shaft is connected to the first transmission shaft through the first gear transmission assembly, and the first output shaft is connected to the first transmission shaft through the second gear transmission assembly. The first input shaft is connected to the first shifting device for transmission, and the first output shaft is used for transmission connection with the first half shaft.

[0011] In the above embodiments, the drive assembly achieves deceleration and torque increase.

[0012] In some embodiments, along the axial direction of the first input shaft, the first shifting device is connected between the first planetary reducer and the first reducer, and the second gear transmission assembly is located on the side of the first gear transmission assembly opposite to the first planetary reducer.

[0013] In the above embodiments, the length of the first half-shaft can be extended, thereby improving the vehicle's grounding performance.

[0014] In some embodiments, the first gear transmission assembly includes a second transmission gear and a third transmission gear, the second transmission gear meshing with the third transmission gear, and the rotational speed of the second transmission gear being greater than the rotational speed of the third transmission gear.

[0015] In the above embodiments, the first-stage reduction of the first reducer can be achieved, thereby realizing the effect of speed reduction and torque increase.

[0016] In some embodiments, the second gear transmission assembly includes a fourth transmission gear and a fifth transmission gear, the fourth transmission gear and the fifth transmission gear meshing, and the rotational speed of the fourth transmission gear is greater than the rotational speed of the fifth transmission gear.

[0017] In the above embodiments, a two-stage reduction of the first reducer can be achieved, thereby realizing the effect of speed reduction and torque increase.

[0018] In some embodiments, the first motor, the first planetary reducer, the first shifting device, and the first reducer are arranged sequentially along the axial direction of the first motor; the drive assembly includes two drive components, which are arranged along the axial direction of the first motor, and the first reducers of the two drive components are arranged adjacent to each other.

[0019] In the above embodiments, the two drive components can be arranged symmetrically, which can drive the two wheels evenly and improve driving performance.

[0020] In some embodiments, the first planetary reducer further includes a first housing, in which a first sun gear, a first planet carrier, and a plurality of first planet gears are disposed. The first reducer also includes a second housing, which is integrally formed with the first housing and the second housing.

[0021] In the above embodiments, the integration of the drive assembly can be improved, space occupation can be reduced, and space utilization can be improved.

[0022] In a second aspect, the four-wheel drive system according to the embodiments of this application includes the drive assembly of the foregoing embodiments.

[0023] In a third aspect, the vehicle according to the embodiments of this application includes the four-wheel drive system of the foregoing embodiments.

[0024] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the drive assembly in some embodiments of this application.

[0027] The reference numerals in the detailed embodiments are as follows: Drive assembly 100, first drive component 10, first motor 11; First planetary reducer 12, first sun gear 121, first planet carrier 122, first planet gear 123, first central shaft 124, first housing 125; First reducer 13, first input shaft 131, first transmission shaft 132, first output shaft 133, second transmission gear 134, third transmission gear 135, fourth transmission gear 136, fifth transmission gear 137, second housing 138; First shifting device 14, first transmission frame 141, first coupling member 142, first transmission gear 143; Second drive assembly 20, first wheel 30, second wheel 40, axial direction AA. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] In related technologies, the drive assembly includes multiple transmission gears with parallel drive shafts. These gears mesh sequentially in pairs, achieving multi-stage speed reduction from the input to the output of the gears to increase torque before transmitting power to the wheels. However, using multiple parallel drive shafts to achieve speed reduction and torque increase is ineffective and results in a bulky assembly that occupies excessive vehicle space. Furthermore, the drive assembly has relatively low torque, requiring the motor to maintain peak speed for extended periods during climbing maneuvers, which can easily damage the motor and cause hazards.

[0030] Therefore, this utility model provides a drive assembly 100 that can improve the vehicle's climbing ability when climbing, and can reduce space occupation and improve the space utilization of the vehicle.

[0031] Reference Figure 1 According to the embodiments of this application, the drive assembly 100 includes at least one drive component.

[0032] The drive assembly includes a first motor 11, a first planetary reducer 12, a first reducer 13, and a first shifting device 14.

[0033] The first motor 11 can serve as the power source for the drive assembly 100.

[0034] The first planetary reducer 12 includes a first sun gear 121, a first planet carrier 122, multiple first planet gears 123, and an internal gear ring. The multiple first planet gears 123 are mounted on the first planet carrier 122 and mesh with the first sun gear 121. The internal gear ring meshes with the multiple first planet gears 123. The first sun gear 121 is connected to the first motor 11 for transmission. The power of the first motor 11 is directly output to the sun gear and then transmitted to the multiple first planet gears 123, finally outputting to realize the reduction function of the first planetary reducer 12.

[0035] The first reducer 13 can reduce speed using planetary reduction or parallel shaft reduction, etc.

[0036] The first shifting device 14 has a first deceleration mode and a first direct drive mode. The first shifting device 14 is configured to drive the first planetary carrier 122 and the first reducer 13 in the first deceleration mode, and drive the first sun gear 121 and the first reducer 13 in the first direct drive mode. In this way, the torque of the drive assembly 100 is increased during off-road climbing, thereby improving the vehicle's climbing ability. In non-off-road conditions, the torque is reduced and the speed is increased, which is highly applicable and can reduce space occupation.

[0037] The working principle of drive assembly 100 is as follows: When the first shifting device 14 is in the first deceleration mode, the first shifting device 14 is connected to the first planetary carrier 122 and the first reducer 13. Power is output from the first motor 11 and sequentially output to the first half-shaft via the first sun gear 121, the first planetary gear 123, the first planetary carrier 122 and the first reducer 13. Through the combined deceleration of the first planetary reducer 12 and the first reducer 13, the deceleration and torque increase effect of the drive assembly 100 can be improved, which helps the vehicle to climb or get out of trouble off-road.

[0038] When the first shifting device 14 is in the first direct drive mode, the first shifting device 14 is connected to the first sun gear 121 and the first reducer 13. Power is output from the first motor 11 and then sequentially through the first sun gear 121 and the first planetary reducer 12 to the first half shaft. At this time, the power only passes through the first reducer 13, and the power output torque of the drive assembly 100 is low and the speed is high, which meets the normal driving needs of the vehicle.

[0039] In summary, according to the drive assembly 100 of this application embodiment, the connection state between the first planetary reducer 12 and the first reducer 13 can be changed by the first shifting device 14. When the vehicle is in off-road condition, the first shifting device 14 can switch to the first deceleration mode to increase the torque output of the drive assembly 100, thereby improving the vehicle's climbing ability. When the vehicle is not in off-road condition, the first shifting device 14 can switch to the first direct drive mode. At this time, the power is directly output from the first motor 11 through the first reducer 13, and the first planetary reducer 12 does not reduce speed and increase torque. There is no gear wear, reducing power loss and improving vehicle quietness.

[0040] Reference Figure 1 In some embodiments of this application, the first shifting device 14 includes a first coupling member 142, which is slidably disposed on the input shaft of the first reducer 13 and can selectively connect the first sun gear 121 and the first planetary carrier 122. Specifically, in the first deceleration mode, the first coupling member 142 is selectively connected to the first planetary carrier 122 to meet the vehicle's climbing and off-road requirements; in the first direct drive mode, the first coupling member 142 is selectively connected to the first sun gear 121 to meet the vehicle's normal driving requirements.

[0041] More specifically, the first shifting device 14 also includes a first transmission frame 141.

[0042] The first transmission frame 141 is connected to the first reducer 13, which can be understood as the first transmission frame 141 being connected to the input end of the first reducer 13. The first transmission frame 141 can provide a mounting position for the first coupling member 142, allowing the first coupling member 142 to switch stably.

[0043] The first coupling member 142 has a first position and a second position, and is slidably disposed on the first transmission frame 141 to switch between the first position and the second position.

[0044] When the first coupling member 142 is in the first position, the first shifting device 14 is in the first deceleration mode, and the first coupling member 142 is connected to the first planetary carrier 122 and the first transmission carrier 141. When the first coupling member 142 is in the second position, the first shifting device 14 is in the first direct drive mode, and the first coupling member 142 is connected to the first sun gear 121 and the first transmission carrier 141. In other words, by sliding the first coupling member 142 between the first position and the second position, the first shifting device 14 switches between the first deceleration mode and the first direct drive mode to meet the vehicle's climbing and normal driving needs.

[0045] Furthermore, the first shifting device 14 also includes a first transmission gear 143.

[0046] Please refer to Figure 1The first planetary carrier 122 has two opposing sides, one facing the first motor 11 and the other facing the first transmission carrier 141. The first sun gear 121 is located on the side of the first planetary carrier 122 facing the first motor 11 for easy transmission connection with the first motor 11. The first coupling member 142 and the first transmission carrier 141 are both located on the other side of the first planetary carrier 122, which facilitates the transmission connection between the first transmission carrier 141 and the first planetary carrier 122 through the first coupling member 142, but makes it difficult to transmit the transmission connection with the first sun gear 121. Based on this, a first transmission wheel can be provided. The first transmission wheel is located on the side of the first planetary carrier 122 facing the first transmission carrier 141, and the first transmission gear 143 is transmittedly connected to the first sun gear 121. In this way, the first coupling member 142, the first transmission carrier 141, and the first transmission gear 143 are all located on the other side of the first planetary carrier 122, which facilitates the first shifting device 14 to switch between the first deceleration mode and the first direct drive mode, improving convenience.

[0047] Reference Figure 1 In some embodiments of this application, the first planetary reducer 12 further includes a first central shaft 124, and the first transmission gear 143 and the first sun gear 121 are both disposed on the first central shaft 124 and are connected by transmission through the first central shaft 124. With this configuration, power can be output from the first motor 11 and transmitted along the first sun gear 121, the first central shaft 124 and the first transmission gear 143. In the first direct drive mode, it can ensure direct power output, reduce power loss and improve the working efficiency of the drive assembly 100.

[0048] Reference Figure 1 In some embodiments of this application, the first reducer 13 includes a first input shaft 131, a first transmission shaft 132, a first output shaft 133, a first gear transmission assembly, and a second gear transmission assembly.

[0049] The first input shaft 131, the first transmission shaft 132, and the first output shaft 133 are arranged in parallel. It can be understood that the axis of the first input shaft 131, the axis of the first transmission shaft 132, and the axis of the first output shaft 133 are parallel to each other.

[0050] The first input shaft 131 is connected to the first transmission shaft 132 through a first gear transmission assembly, and the first output shaft 133 is connected to the first transmission shaft 132 through a second gear transmission assembly; the first input shaft 131 is connected to the first shifting device 14 for transmission, and the first output shaft 133 is used to be connected to the first half shaft for transmission, so as to realize the deceleration and torque increase of the drive assembly 100.

[0051] It is understandable that power is input from the first input shaft 131 and transmitted sequentially along the first gear transmission assembly, the first transmission shaft 132, the second gear transmission assembly and the first output shaft 133. Under the action of the first gear transmission assembly and the second gear transmission assembly, the drive assembly 100 is decelerated and torque is increased.

[0052] Reference Figure 1 In some embodiments of this application, along the axial direction of the first input shaft 131, the first shifting device 14 is connected between the first planetary reducer 12 and the first reducer 13, and the second gear transmission assembly is located on the side of the first gear transmission assembly away from the first planetary reducer 12. This arrangement can extend the length of the first half shaft, thereby improving the grounding performance of the vehicle.

[0053] It is important to understand that a universal joint connects the first half-shaft and the first output shaft 133, enabling omnidirectional rotation of the first half-shaft. When the first half-shaft is extended, the swing angle of the universal joint decreases when the first wheel 30 moves up and down the same distance. This means the angle between the vertical contact point of the first wheel 30 and the ground decreases, improving the vehicle's ground contact. Conversely, when the first half-shaft is not extended, the swing angle of the universal joint increases when the first wheel 30 moves up and down the same distance, resulting in poorer ground contact.

[0054] Based on this, refer to Figure 1 The first wheel 30 is located on the side of the first input shaft 131 close to the first planetary reducer 12. In this way, the second gear transmission assembly can be set on the side of the first gear transmission assembly away from the first planetary reducer 12, thereby increasing the space between the first wheel 30 and the second gear transmission assembly. Correspondingly, the size of the first half-shaft set between the first wheel 30 and the first output shaft 133 can be made longer to improve the grounding of the vehicle.

[0055] Reference Figure 1 In some embodiments of this application, the first gear transmission assembly includes a second transmission gear 134 and a third transmission gear 135. The second transmission gear 134 meshes with the third transmission gear 135, and the rotational speed of the second transmission gear 134 is greater than that of the third transmission gear 135. In this way, the first reducer 13 can achieve a single-stage reduction, thereby achieving the effect of speed reduction and torque increase.

[0056] Reference Figure 1 In some embodiments of this application, the second gear transmission assembly includes a fourth transmission gear 136 and a fifth transmission gear 137. The fourth transmission gear 136 meshes with the fifth transmission gear 137, and the rotational speed of the fourth transmission gear 136 is greater than that of the fifth transmission gear 137. In this way, the first reducer 13 can achieve two-stage reduction, thereby achieving the effect of speed reduction and torque increase.

[0057] Reference Figure 1 In some embodiments of this application, the first motor 11, the first planetary reducer 12, the first shifting device 14, and the first reducer 13 are arranged sequentially along the axial direction of the first motor 11; the drive assembly 100 includes two drive components, which are arranged along the axial direction of the first motor 11, and the first reducers 13 of the two drive components are arranged adjacent to each other. In this way, the two drive components can be arranged symmetrically, which can drive the two wheels evenly and improve driving performance.

[0058] It is understood that the drive assembly 100 includes a first drive component 10 and a second drive component 20. The first drive component 10 includes a first motor 11, a first planetary reducer 12, a first shifting device 14, and a first reducer 13. The second drive component 20 includes a second motor, a second planetary reducer, a second shifting device, and a second reducer. Thus, the drive assembly 100 can be a distributed electric drive assembly 100, with the first drive component 10 driving the first wheel 30 and the second drive component 20 driving the second wheel 40.

[0059] Along the axial direction of the first motor 11, the first planetary reducer 12, the first shifting device 14, the first reducer 13, the second reducer, the second shifting device, the second planetary reducer, and the second motor are arranged sequentially. In this way, the first reducer 13 and the second reducer are arranged adjacent to each other, while the first motor 11 and the second motor are arranged back to back, so that the first drive assembly 10 and the second drive assembly 20 can be arranged symmetrically. The drive assembly 100 can drive the two wheels evenly, thereby improving driving performance.

[0060] The working principle and implementation method of the second driving component 20 are the same as those of the first driving component 10, and can be referred to the foregoing embodiments. This application will not repeat them here.

[0061] Reference Figure 1 In some embodiments of this application, the first planetary reducer 12 further includes a first housing 125, in which the first sun gear 121, the first planet carrier 122 and a plurality of first planet gears 123 are disposed. The first reducer 13 further includes a second housing 138, in which the first housing 125 and the second housing 138 are integrally formed. In this way, the integration of the drive assembly 100 can be improved, the space occupation can be reduced and the space utilization rate can be improved.

[0062] The first reducer 13 includes a first input shaft 131, a first transmission shaft 132, a first output shaft 133, a first gear transmission assembly, and a second gear transmission assembly, all of which are housed within the second housing 138. Furthermore, the first housing 125 and the second housing 138 are integrally formed, and the first planetary reducer 12 and the first reducer 13 are a single integrated structure, allowing for simultaneous assembly during installation and improving assembly convenience.

[0063] It should be explained that the axial direction of the first motor 11 and the axial direction of the first input shaft 131 mentioned above can be understood as being in the same direction, i.e., attached Figure 1 Axial axis AA in.

[0064] According to the embodiments of this application, the four-wheel drive system includes the drive assembly 100 of the aforementioned embodiments. By applying the drive assembly 100 of the aforementioned embodiments, the four-wheel drive system can reduce its volume, reduce its space occupation, and improve its space utilization. It can also increase the torque of the four-wheel drive system, giving it a more advantageous climbing ability.

[0065] According to the embodiments of this application, the vehicle includes the four-wheel drive system of the aforementioned embodiments; by applying the four-wheel drive system of the aforementioned embodiments, the vehicle's climbing ability can be improved, assisting the vehicle in off-road climbing and off-road extrication.

[0066] In this application, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0068] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0069] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0070] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0071] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A drive assembly, characterized in that, Includes at least one driving component; The driving component includes: First motor (11); The first planetary reducer (12) includes a first sun gear (121), a first planet carrier (122) and a plurality of first planet gears (123). The plurality of first planet gears (123) are mounted on the first planet carrier (122) and mesh with the first sun gear (121). The first sun gear (121) is connected to the first motor (11) for transmission. The first reducer (13) and the first shifting device (14) have a first reduction mode and a first direct drive mode. The first shifting device (14) is configured to drive the first planetary carrier (122) and the first reducer (13) in the first reduction mode, and drive the first sun gear (121) and the first reducer (13) in the first direct drive mode.

2. The drive assembly according to claim 1, characterized in that, The first gear shifting device (14) includes a first transmission frame (141), a first coupling member (142) and a first transmission gear (143). The first transmission frame (141) is connected to the first reducer (13) in a transmission connection. The first coupling member (142) is slidably disposed on the first transmission frame (141). The first transmission gear (143) is connected to the first sun gear (121) in a transmission connection. The first coupling member (142) has a first position and a second position. When the first coupling member (142) is in the first position, the first shifting device (14) is in a first deceleration mode, and the first coupling member (142) is drivingly connected to the first planetary carrier (122) and the first transmission carrier (141). When the first coupling member (142) is in the second position, the first shifting device (14) is in a first direct drive mode, and the first coupling member (142) is drivingly connected to the first transmission gear (143) and the first transmission carrier (141).

3. The drive assembly according to claim 2, characterized in that, The first planetary reducer (12) also includes a first central shaft (124), the first transmission gear (143) and the first sun gear (121) are both disposed on the first central shaft (124) and are connected by transmission through the first central shaft (124).

4. The drive assembly according to any one of claims 1-3, characterized in that, The first reducer (13) includes a first input shaft (131), a first transmission shaft (132), a first output shaft (133), a first gear transmission assembly, and a second gear transmission assembly. The first input shaft (131), the first transmission shaft (132), and the first output shaft (133) are arranged in parallel. The first input shaft (131) is connected to the first transmission shaft (132) through the first gear transmission assembly, and the first output shaft (133) is connected to the first transmission shaft (132) through the second gear transmission assembly. The first input shaft (131) is connected to the first shifting device (14) for transmission, and the first output shaft (133) is used to be connected to the first half shaft for transmission.

5. The drive assembly according to claim 4, characterized in that, Along the axial direction of the first input shaft (131), the first shifting device (14) is connected between the first planetary reducer (12) and the first reducer (13), and the second gear transmission assembly is located on the side of the first gear transmission assembly away from the first planetary reducer (12).

6. The drive assembly according to claim 4, characterized in that, The first gear transmission assembly includes a second transmission gear (134) and a third transmission gear (135), wherein the second transmission gear (134) meshes with the third transmission gear (135), and the rotational speed of the second transmission gear (134) is greater than the rotational speed of the third transmission gear (135). And / or, the second gear transmission assembly includes a fourth transmission gear (136) and a fifth transmission gear (137), the fourth transmission gear (136) meshing with the fifth transmission gear (137), and the rotational speed of the fourth transmission gear (136) being greater than the rotational speed of the fifth transmission gear (137).

7. The drive assembly according to any one of claims 1-3, characterized in that, The first motor (11), the first planetary reducer (12), the first shifting device (14) and the first reducer (13) are arranged sequentially along the axial direction of the first motor (11); The drive assembly includes two drive components arranged along the axial direction of the first motor (11), and the first reducers (13) of the two drive components are arranged adjacent to each other.

8. The drive assembly according to any one of claims 1-3, characterized in that, The first planetary reducer (12) further includes a first housing (125), the first sun gear (121), the first planet carrier (122) and a plurality of first planet gears (123) are all disposed in the first housing (125), and the first reducer (13) further includes a second housing (138), the first housing (125) and the second housing (138) are integrally formed.

9. A four-wheel drive system, characterized in that, Includes the drive assembly according to any one of claims 1-8.

10. A vehicle, characterized in that, Includes the four-wheel drive system according to claim 9.

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