Distributed drive system of vehicle and drive assembly

Abstract

A distributed drive system (10), comprising a first drive system (100) and a second drive system (200). The first drive system (100) comprises a first drive motor (110) and a first transmission assembly (120). The first drive motor (110), by means of the first transmission assembly (120), drives a first wheel (11) of a vehicle to rotate. The second drive system (200) comprises a second drive motor (210) and a second transmission assembly (220). The second drive motor (210), by means of the second transmission assembly (220), drives a second wheel (12) of the vehicle to rotate. The first wheel (11) and the second wheel (12) are located on the same drive axle. The first transmission assembly (120) comprises a first oil churning member (121). The first oil churning member (121) can, by means of rotation, allow engine oil to be splashed on the first drive motor (110). The second transmission assembly (220) comprises a second oil churning member (221). The second oil stirring member (221) can, by means of rotation, allow engine oil to be splashed on the second drive motor (210). Further provided is a drive assembly applying the distributed drive system. The drive assembly has a more compact structure, and the occupied space is reduced.

Description

Vehicle distributed drive system and drive assembly Technical Field

[0001] The present invention relates to the field of vehicle drive systems, and in particular to a distributed drive system and a drive assembly for a vehicle. Background Art

[0002] A distributed drive system is one that uses independent motors to drive different wheels. The torque output by each motor in this system is not coupled, allowing for independent control of the torque output based on the driving force required by each wheel. Differential steering can also be achieved by controlling the speeds of the wheels. Related distributed drive systems use different in-wheel motors to drive different wheels, but these systems are not compact and require a large amount of space.

[0003] Summary of the Invention

[0004] The present invention provides a distributed drive system and a drive assembly for a vehicle, which are used to solve the technical problem of how to make the structure of the distributed drive system more compact, thereby reducing the occupied space of the distributed drive system.

[0005] An embodiment of the present invention provides a distributed drive system for a vehicle, which includes: a first drive system, wherein the first drive system includes a first drive motor and a first transmission assembly, and the first drive motor drives the first wheel of the vehicle to rotate via the first transmission assembly; a second drive system, wherein the second drive system includes a second drive motor and a second transmission assembly, and the second drive motor drives the second wheel of the vehicle to rotate via the second transmission assembly; wherein the first wheel and the second wheel are on the same drive shaft, the first transmission assembly includes a first oil stirring element, and the first oil stirring element can splash engine oil to the first drive motor by rotation, and the second transmission assembly includes a second oil stirring element, and the second oil stirring element can splash engine oil to the second drive motor by rotation.

[0006] Furthermore, the output shaft of the first drive motor and the output shaft of the second drive motor are coaxial, the first output shaft and the second output shaft are coaxial, the first oil stirring member is located below the first drive motor, and the second oil stirring member is located below the second drive motor.

[0007] Furthermore, the first transmission assembly includes: a first gear and a first output shaft, the first gear is fixed to the first output shaft, the first output shaft is connected to the first drive motor through the first gear, the first output shaft is connected to the first wheel, and the first gear is located below the first drive motor to form the first oil stirring member; the second transmission assembly includes: a second gear and a second output shaft, the second gear is fixed to the second output shaft, the second output shaft is connected to the second drive motor through the second gear, the second output shaft is connected to the second wheel, and the second gear is located below the second drive motor to form the second oil stirring member.

[0008] Furthermore, the first transmission assembly also includes: a first intermediate shaft and a third gear, wherein the first intermediate shaft is located between the first drive motor and the first output shaft in the vertical direction, the first intermediate shaft is connected to the first drive motor, and the third gear is fixed to the first intermediate shaft and meshed with the first gear; the second transmission assembly also includes: a second intermediate shaft and a fourth gear, wherein the second intermediate shaft is located between the second drive motor and the second output shaft in the vertical direction, the second intermediate shaft is connected to the second drive motor, and the fourth gear is fixed to the second intermediate shaft and meshed with the second gear; wherein, in the horizontal direction, the third gear is located on one side of the first gear, and the fourth gear is located on one side of the second gear, and the horizontal direction is perpendicular to the vertical direction.

[0009] Furthermore, the first transmission assembly includes a first planetary gear train, which is connected to the first drive motor and the first wheel, and is located below the first drive motor. The outer ring gear of the first planetary gear train forms the first oil stirring element; the second transmission assembly includes a second planetary gear train, which is connected to the second drive motor and the second wheel, and is located below the second drive motor. The outer ring gear of the second planetary gear train forms the second oil stirring element.

[0010] Furthermore, the output shaft of the first drive motor and the output shaft of the second drive motor are parallel and spaced apart, and the axis of the output shaft of the first drive motor and the axis of the output shaft of the second drive motor are located in the same horizontal plane, and the horizontal plane is a plane perpendicular to the vertical direction; in the horizontal direction, the first oil stirring member is located on one side of the first drive motor, and the second oil stirring member is located on one side of the second drive motor, and the horizontal direction is perpendicular to the vertical direction.

[0011] Furthermore, the first transmission assembly also includes a first transmission gear train, the first oil stirring member is connected to the first transmission gear train, and is spaced apart from the transmission gear in the first transmission gear train; the second transmission assembly also includes a second transmission gear train, the second oil stirring member is connected to the second transmission gear train, and is spaced apart from the transmission gear in the second transmission gear train.

[0012] Furthermore, the distributed drive system also includes a connecting shaft, which connects the first drive system and the second drive system; the connecting shaft has a connecting structure that can switch between a first state and a second state, and when the connecting structure is in the first state, torque cannot be transmitted between the first drive system and the second drive system through the connecting shaft, and when the connecting structure is in the second state, torque can be transmitted between the first drive system and the second drive system through the connecting shaft.

[0013] Furthermore, the connecting shaft connects the output shaft of the first drive motor and the output shaft of the second drive motor, or the connecting shaft connects the first transmission assembly and the second transmission assembly.

[0014] An embodiment of the present invention also provides a vehicle drive assembly, which includes a range extender component for charging the vehicle's power battery; a hub motor for driving the wheels of the vehicle's front drive axle; and the distributed drive system as described above for driving the wheels of the vehicle's rear drive axle.

[0015] An embodiment of the present invention provides a distributed drive system for a vehicle, comprising a first drive system having a first drive motor and a first transmission assembly, and a second drive system having a second drive motor and a second transmission assembly. The first drive motor drives a first wheel to rotate via the first transmission assembly, and the second drive motor drives a second wheel to rotate via the second transmission assembly, wherein the first wheel and the second wheel are located on the same drive axle. The first transmission assembly includes a first oil stirring element that can cause oil to splash toward the first drive motor upon rotation, and the second transmission assembly includes a second oil stirring element that can cause oil to splash toward the second drive motor upon rotation. It can be understood that by having the first drive motor and the first transmission assembly share a cavity and oil, and the second drive motor and the second transmission assembly share a cavity and oil, the stator of the first drive motor can be cooled by oil splashing from the first oil stirring element of the first transmission assembly, and the stator of the second drive motor can be cooled by oil splashing from the second oil stirring element of the second transmission assembly, without the need for additional cooling systems for the first and second drive motors. This makes the structure of the distributed drive system more compact and reduces the space occupied by the distributed drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic structural diagram of a distributed drive system for a vehicle provided by an embodiment of the present invention;

[0017] FIG2 is a schematic diagram showing the relative relationship between the first oil stirring member and the third gear in the distributed drive system of a vehicle provided by an embodiment of the present invention;

[0018] FIG3 is a schematic structural diagram of another distributed drive system for a vehicle provided by an embodiment of the present invention;

[0019] FIG4 is a schematic diagram of the assembly of a first planetary gear train, a first drive motor, and a second wheel in a distributed drive system for a vehicle provided by an embodiment of the present invention;

[0020] FIG5 is a schematic structural diagram of another distributed drive system for a vehicle provided by an embodiment of the present invention;

[0021] FIG6 is a schematic structural diagram of another distributed drive system for a vehicle provided by an embodiment of the present invention;

[0022] FIG7 is a schematic structural diagram of another distributed drive system for a vehicle provided by an embodiment of the present invention;

[0023] FIG8 is a schematic structural diagram of a vehicle drive assembly provided by an embodiment of the present invention.

[0024] Description of Reference Numerals

[0025] 1. Drive assembly; 10. Distributed drive system; 11. First wheel; 12. Second wheel; 100. First drive system; 110. First drive motor; 120. First transmission assembly; 121. First oil stirring member; 122. First gear; 123. First output shaft; 124. First intermediate shaft; 125. Third gear; 126. First planetary gear train; 1261. Sun gear; 1262. Planetary gear; 1263. Planetary carrier; 1264. Outer ring gear; 127. First transmission gear train; 200. Second drive system; 210. Second drive motor; 220. Second transmission assembly; 221. Second oil stirring member; 222. Second gear; 223. Second output shaft; 224. Second intermediate shaft; 225. Fourth gear; 226. Second planetary gear train; 227. Second transmission gear train; 300. Connecting shaft; 310. Connecting structure. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in the present invention will not be described separately.

[0028] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to directions during normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not be the left-right directions during normal use.

[0029] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising that element. The term "connected," unless otherwise specified, includes both direct and indirect connections.

[0030] In the following specific embodiments, the distributed drive system can be applied to any type of vehicle. For example, the distributed drive system can be applied to both sedans and trucks. The distributed drive system can be applied to a portion of a vehicle's drive axle. For example, the distributed drive system can be applied to the front drive axle of a vehicle. The distributed drive system can also be applied to the rear drive axle of a vehicle. For ease of explanation, the distributed drive system will be applied to the rear drive axle of a sedan as an example to illustrate the structure of the distributed drive system.

[0031] In some embodiments, as shown in FIG1 , a distributed drive system 10 includes: a first drive system 100 and a second drive system 200. The first drive system 100 includes a first drive motor 110 and a first transmission assembly 120. The first drive motor 110 drives the first wheel 11 of the vehicle to rotate via the first transmission assembly 120. The second drive system 200 includes a second drive motor 210 and a second transmission assembly 220. The second drive motor 210 drives the second wheel 12 of the vehicle to rotate via the second transmission assembly 220. The first wheel 11 and the second wheel 12 are located on the same drive axle. For example, the drive axle is a rear axle, with the first wheel 11 located on the left side of the rear axle and the second wheel 12 located on the right side of the rear drive axle. It can be understood that the first drive motor 110 and the second drive motor 210 independently control the left and right wheels of the rear drive axle via the first transmission assembly 120 and the second transmission assembly 220, respectively, to achieve distributed drive of the rear drive axle.

[0032] At the same time, the first transmission assembly 120 includes a first oil stirring member 121. The first oil stirring member 121 can splash the engine oil to the first drive motor 110 by rotating. That is, in the process of transmitting the torque of the first drive motor 110 to the first wheel 11 through the first transmission assembly 120, the first oil stirring member 121 can also be driven to rotate. Specifically, the first transmission assembly 120 and the first drive motor 110 are accommodated in the same housing. The first oil stirring member 121 can stir the engine oil contained in the bottom of the housing by rotating, so that the engine oil splashes and splashes to the first drive motor 110, and then the stator of the first drive motor 110 is cooled by the splashing engine oil. The second transmission assembly 220 includes a second oil stirring member 221, which can cause the oil to splash to the second drive motor 210 by rotating. That is, in the process of transmitting the torque of the second drive motor 210 to the second wheel 12 through the second transmission assembly 220, the second oil stirring member 221 can also be driven to rotate. Specifically, the second transmission assembly 220 and the second drive motor 210 are accommodated in the same housing. The second oil stirring member 221 can stir the oil contained in the bottom of the housing by rotating, so that the oil splashes, and the oil can splash to the second drive motor 220, and then the stator of the second drive motor 210 is cooled by the splashing oil. It can be understood that by making the first drive motor 110 and the first transmission assembly 120 share a cavity and a common oil, and the second drive motor 210 and the second transmission assembly 220 share a cavity and a common oil, the stator of the first drive motor 110 can be cooled by utilizing the oil throwing of the first oil stirring member 121 of the first transmission assembly 120, and the stator of the second drive motor 210 can be cooled by utilizing the oil throwing of the second oil stirring member 221 of the second transmission assembly 220, without the need to additionally set up a cooling system for the first drive motor 110 and the second drive motor 120, thereby making the structure of the distributed drive system 10 more compact and reducing the occupied space of the distributed drive system 10. It should be noted that the first oil stirring member 121 is located at any position where the engine oil can be splashed onto the first drive motor 110 by oil throwing. Exemplarily, the first oil stirring member 121 can be located directly below the first drive motor 110, or it can be located on the side of the first drive motor 110 and the first drive motor 110 is located in the tangential direction of the first oil stirring member 121; exemplarily, the second oil stirring member 221 can be located directly below the second drive motor 210, or it can be located on the side of the second drive motor 210 and the second drive motor 210 is located in the tangential direction of the second oil stirring member 221.

[0033] Optionally, as shown in Figure 1, in the width direction of the vehicle, the first wheel 11 and the first drive motor 110 are located on the same side, and the second wheel 12 and the second drive motor 210 are located on the same side, so that the first oil stirring member 121 of the first transmission assembly 120 can be located close to the first drive motor 110 while the first transmission assembly 120 is connected to the first wheel 11 close to the first drive motor 110; and the second oil stirring member 221 of the second transmission assembly 220 can be located close to the second drive motor 210 while the second transmission assembly 220 is connected to the second wheel 12 close to the second drive motor 210, so that the structure of the distributed drive system 10 is more compact.

[0034] An embodiment of the present invention provides a distributed drive system for a vehicle, comprising a first drive system having a first drive motor and a first transmission assembly, and a second drive system having a second drive motor and a second transmission assembly. The first drive motor drives a first wheel to rotate via the first transmission assembly, and the second drive motor drives a second wheel to rotate via the second transmission assembly, wherein the first wheel and the second wheel are located on the same drive axle. The first transmission assembly includes a first oil stirring element that can cause oil to splash toward the first drive motor upon rotation, and the second transmission assembly includes a second oil stirring element that can cause oil to splash toward the second drive motor upon rotation. It can be understood that by having the first drive motor and the first transmission assembly share a cavity and oil, and the second drive motor and the second transmission assembly share a cavity and oil, the stator of the first drive motor can be cooled by oil splashing from the first oil stirring element of the first transmission assembly, and the stator of the second drive motor can be cooled by oil splashing from the second oil stirring element of the second transmission assembly, without the need for additional cooling systems for the first and second drive motors. This makes the structure of the distributed drive system more compact and reduces the space occupied by the distributed drive system.

[0035] In some embodiments, as shown in Figure 1, the output shaft of the first drive motor 110 and the output shaft of the second drive motor 210 are coaxial and collinear, the first oil stirring member 121 is located below the first drive motor 110, and the second oil stirring member 221 is located below the second drive motor 210, so that when the two drive motors are arranged coaxially and collinearly, the oil stirring member can splash the oil to the bottom of the first drive motor 110 and the second drive motor 210 through the oil throwing. It should be noted that after the oil splashes onto the motor stator, the oil will drip downward under the action of gravity, resulting in a small amount of oil flowing through the bottom of the motor stator. By arranging the oil stirring member below the motor, the oil is directly splashed to the bottom of the motor, thereby improving the cooling capacity of the bottom of the motor stator.

[0036] In some embodiments, as shown in FIG1 , the first transmission assembly 120 includes: a first gear 122 and a first output shaft 123, the first gear 122 is fixed to the first output shaft 123, the first output shaft 123 is connected to the first drive motor 110 through the first gear 122, and the first output shaft 123 is connected to the first wheel 11, that is, the first drive motor 110 is engaged with the first gear 122 through the transmission structure to transmit the torque to the first output shaft 123, and the first output shaft 123 can drive the first wheel 11 to rotate. At the same time, the first gear 122 is located on one side of the second drive motor 210 to form a first stirring shaft. Component 121 can be understood as follows: in the horizontal direction, the first gear 122 is spaced apart from the second drive motor 210, and part of the first gear 122 is located in the engine oil contained in the bottom of the housing, so that the first gear 122 can transmit the torque of the first drive motor 110 to the first output shaft 123, and at the same time, the first gear 122 can splash the engine oil to the first drive motor 110 by throwing the oil, that is, the oil is thrown by rotating the first gear 122 that can transmit the torque, so that the first gear 122 has the functions of transmitting the torque and splashing the engine oil to the first drive motor 110, so that there is no need to set up other additional components. The second gear 222 is located on one side of the second drive motor 210 to form a second oil stirring member 221, which can be used to stir the second wheel 12. It can be understood that in the horizontal direction, the second gear 222 is spaced apart from the second drive motor 210, and a portion of the second gear 222 is located in the engine oil contained in the bottom of the housing, so that the second gear 222 can transmit the torque of the second drive motor 210 to the second output shaft 223 while the second gear 222 can splash the engine oil onto the second drive motor 210 by throwing the oil. That is, the second gear 222, which can transmit torque, rotates to throw the oil, so that the second gear 222 has the functions of both transmitting torque and splashing the engine oil onto the second drive motor 210, thereby eliminating the need for an additional oil stirring structure.In summary, while first gear 122 and second gear 222 transmit torque, they also splash oil onto first drive motor 110 and second drive motor 210 through oil slinging. This eliminates the need for additional oil stirring elements, allowing first gear 122 and second gear 222 to function as first oil stirring element 121 and second oil stirring element 221, respectively, cooling first drive motor 110 and second drive motor 210, further improving the structural compactness of distributed drive system 10.

[0037] In some embodiments, as shown in FIG1 , the first transmission assembly 120 further includes: a first intermediate shaft 124 and a third gear 125. The first intermediate shaft 124 is located between the first drive motor 110 and the first output shaft 123. The first intermediate shaft 124 is connected to the first drive motor 110. The third gear 125 is fixed to the first intermediate shaft 124 and meshes with the first gear 122. That is, the first drive motor 110 can transmit power to the first intermediate shaft 124, and the first intermediate shaft 124 can transmit power from the first intermediate shaft 124 to the first output shaft 123 through the meshing of the third gear 125 and the first gear 122. That is, the third gear 125 is provided on the first output shaft 123 and the first output shaft 123. The first intermediate shaft 124 between the first drive motor 110 and the engagement between the third gear 125 and the first gear 122 transmit the power of the first output motor 110 to the first output shaft 123. At the same time, as shown in Figure 2, in the horizontal direction, the third gear 125 is located on one side of the first gear 122, that is, the third gear 125 is not located directly above the first gear 122, so that the third gear 125 can not only transmit power to the first output shaft 123, but also reduce the blocking effect of the third gear 125 on the oil thrown out by the first gear 123, so that the oil thrown out by the first gear 123 can be splashed to the first drive motor 110 more smoothly.

[0038] The second transmission assembly 220 further includes: a second intermediate shaft 224 and a fourth gear 225. The second intermediate shaft 224 is located between the second drive motor 210 and the second output shaft 223. The second intermediate shaft 224 is connected to the second drive motor 210. The fourth gear 225 is fixed to the second intermediate shaft 224 and meshes with the second gear 222. That is, the second drive motor 210 can transmit power to the second intermediate shaft 224, and the second intermediate shaft 224 can transmit power from the second intermediate shaft 224 to the second output shaft 223 through the meshing of the fourth gear 225 and the second gear 222. That is, the power is transmitted from the second intermediate shaft 224 to the second output shaft 223 through the meshing of the fourth gear 225 and the second gear 222. The second intermediate shaft 224 between the fourth gear 225 and the second gear 222 is engaged with each other to transmit the power of the second drive motor 210 to the second output shaft 223. At the same time, as shown in Figure 2, in the horizontal direction, the fourth gear 225 is located on one side of the second gear 222, that is, the fourth gear 225 is not located directly above the second gear 222, so that the fourth gear 225 can not only transmit power to the second output shaft 223, but also reduce the blocking effect of the fourth gear 225 on the oil thrown out by the second gear 223, so that the oil thrown out by the second gear 223 can be splashed to the second drive motor 210 more smoothly.

[0039] In some embodiments, as shown in FIG3 , the first transmission assembly 120 includes a first planetary gear train 126, which is connected to the first drive motor 110 and the first wheel 11. In the horizontal direction, the first planetary gear train 126 is located on one side of the first drive motor 110, and the outer gear ring of the first planetary gear train 126 forms a first oil stirring member 121, that is, the first planetary gear train 126 can transmit the torque of the first drive motor 110 to the first wheel 11, and can also throw oil through the rotation of the outer gear ring of the first planetary gear train 126, so that the engine oil splashes to the first drive motor 110. The second transmission assembly 220 includes a second planetary gear train 226, which is connected to the second drive motor 210 and the second wheel 12. In the horizontal direction, the second planetary gear train 226 is located on one side of the second drive motor 210, and the outer ring gear of the second planetary gear train 226 forms a second oil stirring member 221. That is, the second planetary gear train 226 can transmit the torque of the second drive motor 210 to the second wheel 12, and can also swing oil through the rotation of the outer ring gear of the second planetary gear train 226, thereby splashing the oil to the second drive motor 210. Moreover, torque transmission through the planetary gear train can make the structure of the transmission assembly more compact while reducing speed and increasing torque, further reducing the size of the distributed drive system 10.

[0040] Among them, the motion relationship between the various parts of the first planetary gear system 126 and the second planetary gear 226 can reduce speed and increase torque and can make the outer ring gear rotate. The specific structure of the first planetary gear 126 and the motion relationship of the various parts are used as an example for exemplary explanation. The motion relationship of the various parts of the second planetary gear 226 is the same as that of the first planetary gear 126. As shown in Figure 4, the first planetary gear system 126 includes: a sun gear 1261, planetary gears 1262, a planetary carrier 1263 and an outer ring gear 1264. The sun gear 1261 is connected to the first drive motor 110, the rotation of the planetary gear 1262 is restricted and can revolve around the sun gear, the outer ring gear 1264 can rotate driven by the revolution of the planetary gear 1262, and the planetary carrier 1263 is connected to the first wheel 11.

[0041] In some embodiments, as shown in Figure 5, the output shaft of the first drive motor 110 and the output shaft of the second drive motor 210 are parallel and spaced apart, and the axis of the output shaft of the first drive motor 110 and the output shaft of the second drive motor 210 are located in the same horizontal plane, which is a plane perpendicular to the vertical direction, that is, the first drive motor 110 and the second drive motor 210 are spaced apart in the horizontal direction, and the output shafts of the first drive motor 110 and the second drive motor 210 are parallel. At the same time, in the horizontal direction, the first oil stirring member 121 is located on one side of the first drive motor 110, and the second oil stirring member 221 is located on one side of the second drive motor 210. It can be understood that the first transmission assembly 120 and the second transmission assembly 220 are arranged at intervals in the horizontal direction, and the first oil stirring member 121 is located on one side of the first drive motor 110 in the horizontal direction, and the second oil stirring member 221 is located on one side of the second drive motor 210 in the horizontal direction. In this way, while the first oil stirring member 121 can splash the oil to the first drive motor 110 by throwing the oil, and the second oil stirring member 221 can splash the oil to the second drive motor 210 by throwing the oil, the height dimension of the distributed drive system 10 can also be reduced, so that the distributed drive system 10 can be applied to a skateboard-type vehicle chassis.

[0042] In some embodiments, as shown in FIG6 , the first transmission assembly 120 further includes a first transmission gear train 127 , which connects the first drive motor 110 and the first wheel 11 , and a first oil stirring member 121 is connected to the first transmission gear train 127 , and the first oil stirring member 121 is spaced apart from the gears in the first transmission gear train 127 . It can be understood that the first drive motor 110 transmits power to the second wheel 12 through the first transmission gear train 127 , and the first oil stirring member 121 is an oil stirring structure independent of the transmission gears in the first transmission gear train 127 . The first oil stirring member 121 is only used to splash the engine oil to the first drive motor 110 by throwing the oil. The first oil stirring member 121 does not need to participate in the power transmission of the first transmission gear train 127 , so that the setting of the first oil stirring member 121 The position is more free; the second transmission assembly 220 also includes a second transmission gear train 227, the second transmission gear train 227 connects the second drive motor 210 and the second wheel 21, the second oil stirring member 221 is connected to the second transmission gear train 227, and the second oil stirring member 221 is spaced apart from the gears in the second transmission gear train 227. It can be understood that the second drive motor 210 transmits power to the second wheel 21 through the second transmission gear train 227, and the second oil stirring member 221 is an oil stirring structure independent of the transmission gear in the second transmission gear train 227. The second oil stirring member 221 is only used to splash the engine oil to the second drive motor 210 by throwing the oil. The second oil stirring member 221 does not need to participate in the power transmission of the second transmission gear train 227, so that the setting position of the second oil stirring member 221 is more free.

[0043] In some embodiments, as shown in FIG7 , the distributed drive system 10 further includes a connecting shaft 300, which connects the first drive system 100 and the second drive system 200. The connecting shaft 300 has a connecting structure 310 that can switch between a first state and a second state. When the connecting structure is in the first state, the first drive system 100 and the second drive system 200 cannot transmit torque through the connecting shaft 300; when the connecting structure 310 is in the second state, the first drive system 100 and the second drive system 200 can transmit torque to each other through the connecting shaft 300. It can be understood that by connecting the first drive system 100 and the second drive system 200, during normal driving of the vehicle, the connecting structure 310 is in the first state, and the first drive system 100 and the second drive system 200 cannot transmit torque to each other through the connecting shaft 300, that is, the torque of the first drive system 100 and the second drive system 200 is in a decoupled state, thereby realizing distributed drive of the vehicle; during normal driving of the vehicle, the connecting shaft 300 is connected to the first drive system 100 and the second drive system 200. When one of the first and second wheels of the vehicle is in a slipping state, making it impossible for the vehicle to move, the state of the connecting structure 310 is switched to the second state. At this time, the first drive system 100 and the second drive system 200 can transmit torque to each other through the connecting shaft 300, that is, the torque of the first drive system 100 and the second drive system 200 are coupled, so that the torque output by the first drive motor 110 and the second drive motor 210 can be transmitted to the first wheel 11 and the second wheel 12 after coupling, thereby improving the vehicle's escape ability; when one of the first and second drive motors 110 and 210 of the vehicle fails and cannot operate, the state of the connecting structure 310 is switched to the second state. At this time, the drive motor that can operate normally can transmit torque to the failed drive system through the connecting shaft 300, thereby driving the first and second wheels 11 and 12 to rotate at the same time. At the same time, the vehicle alarm notifies the driver of the drive motor failure and limits the vehicle speed, that is, achieving limp home. In which, the connecting shaft 300 can be connected to different parts of the first drive system 100 and the second drive system 200 so that the first drive system 100 and the second drive system 200 can transmit torque to each other. Optionally, as shown in Figure 6, the connecting shaft 300 is connected to the first output shaft 123 and the second output shaft 223. Optionally, the connecting shaft 300 is connected to the output shaft of the first drive motor 110 and the output shaft of the second drive motor 210.

[0044] It should be noted that the connection structure 310 can be any structure that can realize the power rotation and interruption between the first drive system 100 and the second drive system 200. Exemplarily, the connection structure 310 is a clutch. When the clutch is in a disengaged state, the connection structure 310 is in a first state, and the first drive system 100 and the second drive system 200 cannot transmit torque through the connecting shaft 300. When the clutch is in an engaged state, the connection structure 310 is in a second state, and the first drive system 100 and the second drive system 200 can transmit torque to each other through the connecting shaft 300. Exemplarily, the connection structure 310 is a coupling sleeve. When the coupling sleeve is in a disengaged state, the coupling sleeve is idle. When the connection structure 310 is in a first state, the first drive system 100 and the second drive system 200 cannot transmit torque through the connecting shaft 300. When the coupling sleeve is in an engaged state, the coupling sleeve can drive the connecting shaft 300 to rotate. When the connection structure 310 is in a second state, the first drive system 100 and the second drive system 200 can transmit torque to each other through the connecting shaft 300.

[0045] An embodiment of the present invention further provides a vehicle drive assembly, which is applied to an extended-range hybrid vehicle, and one of the drive axles of the vehicle is a distributed drive system.

[0046] In some embodiments, as shown in FIG8 , the drive assembly 1 includes: a range-extending component 20, a hub motor 21, and a distributed drive system 10. The range-extending component 20 is a component that can generate electricity by driving a generator through the operation of the engine, and is used to charge the vehicle's power battery. The hub motor 21 is used to obtain electrical energy from the power battery and drive the wheels of the vehicle's front drive axle. The distributed drive system 10 is a structure as shown in any one of FIG1 to FIG7 , and is used to drive the wheels of the vehicle's rear drive axle. It can be understood that the vehicle axle drive is driven by the hub motor 21, providing a space for the range-extending component 20 provided in the front cabin of the vehicle. At the same time, the provision of the range-extending component 20 can also provide electrical energy for the vehicle, extending the vehicle's cruising range.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A distributed drive system for a vehicle, characterized in that: The distributed drive system comprises: A first driving system, wherein the first driving system comprises a first driving motor and a first transmission assembly, wherein the first driving motor drives a first wheel of the vehicle to rotate through the first transmission assembly; A second drive system, the second drive system comprising a second drive motor and a second transmission assembly, the second drive motor drives a second wheel of the vehicle to rotate through the second transmission assembly; Wherein, the first wheel and the second wheel are on the same drive shaft, the first transmission assembly includes a first oil stirring member, and the first oil stirring member can splash the engine oil to the first drive motor by rotating, and the second transmission assembly includes a second oil stirring member, and the second oil stirring member can splash the engine oil to the second drive motor by rotating.

2. The distributed drive system according to claim 1, characterized in that: The output shaft of the first drive motor and the output shaft of the second drive motor are coaxial, the first output shaft and the second output shaft are coaxial, the first oil stirring member is located below the first drive motor, and the second oil stirring member is located below the second drive motor.

3. The distributed drive system according to claim 2, characterized in that: The first transmission assembly includes: a first gear and a first output shaft, the first gear is fixed to the first output shaft, the first output shaft is connected to the first drive motor through the first gear, the first output shaft is connected to the first wheel, and the first gear is located below the first drive motor to form the first oil stirring member; The second transmission assembly includes: a second gear and a second output shaft, the second gear is fixed to the second output shaft, the second output shaft is connected to the second drive motor through the second gear, the second output shaft is connected to the second wheel, and the second gear is located below the second drive motor to form the second oil stirring member.

4. The distributed drive system according to claim 3, characterized in that: The first transmission assembly further includes: a first intermediate shaft and a third gear, wherein the first intermediate shaft is located between the first drive motor and the first output shaft in the vertical direction, the first intermediate shaft is connected to the first drive motor, and the third gear is fixed to the first intermediate shaft and meshes with the first gear; The second transmission assembly further includes: a second intermediate shaft and a fourth gear, wherein the second intermediate shaft is located between the second drive motor and the second output shaft in the vertical direction, the second intermediate shaft is connected to the second drive motor, and the fourth gear is fixed to the second intermediate shaft and meshes with the second gear; Wherein, in the horizontal direction, the third gear is located on one side of the first gear, the fourth gear is located on one side of the second gear, and the horizontal direction is perpendicular to the vertical direction.

5. The distributed drive system according to claim 2, characterized in that: The first transmission assembly includes a first planetary gear train, the first planetary gear train is connected to the first drive motor and to the first wheel, the first planetary gear train is located below the first drive motor, and the outer gear ring of the first planetary gear train forms the first oil stirring member; The second transmission assembly includes a second planetary gear train, which is connected to the second drive motor and to the second wheel. The second planetary gear train is located below the second drive motor, and the outer gear ring of the second planetary gear train forms the second oil stirring member.

6. The distributed drive system according to claim 1, characterized in that: The output shaft of the first drive motor and the output shaft of the second drive motor are parallel and spaced apart, and the axis of the output shaft of the first drive motor and the axis of the output shaft of the second drive motor are located in the same horizontal plane, and the horizontal plane is a plane perpendicular to the vertical direction; In the horizontal direction, the first oil stirring member is located on one side of the first driving motor, and the second oil stirring member is located on one side of the second driving motor, and the horizontal direction is perpendicular to the vertical direction.

7. The distributed drive system according to claim 2 or 6, characterized in that: The first transmission assembly further comprises a first transmission gear train, the first oil stirring member is connected to the first transmission gear train and is spaced apart from a transmission gear in the first transmission gear train; The second transmission assembly further includes a second transmission gear train, and the second oil stirring member is connected to the second transmission gear train and is spaced apart from a transmission gear in the second transmission gear train.

8. The distributed drive system according to claim 7, characterized in that: The distributed drive system further comprises a connecting shaft, wherein the connecting shaft connects the first drive system and the second drive system; The connecting shaft has a connecting structure that can be switched between a first state and a second state. When the connection structure is in a first state, torque cannot be transmitted between the first drive system and the second drive system through the connecting shaft. When the connection structure is in a second state, torque can be transmitted between the first drive system and the second drive system through the connecting shaft.

9. The distributed drive system according to claim 8, characterized in that: The connecting shaft connects an output shaft of the first driving motor and an output shaft of the second driving motor.

10. The distributed drive system according to claim 8, characterized in that: The connecting shaft connects the first transmission assembly and the second transmission assembly.

11. The distributed drive system according to claim 1, characterized in that: The first drive motor and the first transmission assembly share a cavity and oil, and the first oil stirring member of the first transmission assembly rotates in a transmission state to stir the oil, and throws the oil to the stator of the first drive motor for cooling; The second drive motor and the second transmission assembly share a cavity and oil. The second oil stirring member of the second transmission assembly rotates in a transmission state to stir the oil, and throws it to the stator of the second drive motor for cooling.

12. The distributed drive system according to claim 11, characterized in that: The first driving motor is located in the tangential direction of the rotation of the first oil stirring member; The second driving motor is located in the tangential direction of the rotation of the second oil stirring member.

13. The distributed drive system according to claim 1, 11 or 12, characterized in that: The first oil stirring member is one of the gears in the first transmission assembly; The second oil stirring member is one of the gears in the second transmission assembly.

14. A vehicle drive assembly, characterized in that: The drive assembly comprises: A range-extending component for charging a power battery of the vehicle; A wheel hub motor for driving the wheels of the front axle of the vehicle; A distributed drive system as claimed in any one of claims 1 to 13, used to drive the wheels of the rear axle of the vehicle.

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