Power driving system and vehicle

Abstract

The invention discloses a power driving system and a vehicle, and relates to the field of vehicles, a first power driving device comprises a first motor, a first differential mechanism and a first combination device, the first motor is in transmission connection with the first differential mechanism, and the first differential mechanism is in transmission connection with a first output shaft; the first differential mechanism is selectively connected with the second output shaft through a first combination device; the second power driving device comprises a second motor, a second differential mechanism and a second combination device, the second motor is in transmission connection with the second differential mechanism, the second differential mechanism is in transmission connection with the fourth output shaft, and the second differential mechanism is selectively connected with the third output shaft through the second combination device; in the first direction, the first combining device is located at one end of the first differential in the first direction, and the second combining device is located at the other end of the second differential in the first direction. The power driving system is flexible in transmission, capable of achieving multiple driving modes, simple in structure and low in production cost.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more particularly to a power drive system and a vehicle. Background Technology

[0002] Electric drive replacing traditional internal combustion engine drive has become an unstoppable trend. Compared with traditional internal combustion engine drive, electric drive is more flexible and faster in control, the power system responds more quickly, and electric drive has relatively lower requirements for transmission. Therefore, it can easily achieve many drive functions that are difficult for traditional internal combustion engines to achieve.

[0003] However, existing drive systems are inflexible in transmission, cannot achieve multiple drive modes, and have complex structures and high production costs. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a power drive system that is flexible in transmission, capable of realizing multiple driving modes, and has a relatively simple structure and low production cost.

[0005] The power drive system according to the present invention includes: a first drive assembly, the first drive assembly including: a first output shaft, a first power drive device and a second output shaft arranged sequentially along a first direction, the first power drive device including: a first motor, a first differential and a first coupling device, the first motor being drivenly connected to the first differential, the first differential being drivenly connected to the first output shaft, and the first differential being selectively connected to the second output shaft through the first coupling device;

[0006] The second drive assembly includes a third output shaft, a second power drive device, and a fourth output shaft arranged sequentially along the first direction. The second power drive device includes a second motor, a second differential, and a second coupling device. The second motor is drivenly connected to the second differential, the second differential is drivenly connected to the fourth output shaft, and the second differential is selectively connected to the third output shaft through the second coupling device.

[0007] The first drive assembly and the second drive assembly are arranged spaced apart along the second direction. Along the first direction, the first engagement device is located at one end of the first differential in the first direction, and the second engagement device is located at the other end of the second differential in the first direction. The first direction is perpendicular to the second direction.

[0008] The power drive system proposed in this application comprises a first motor driven by a first differential, a first differential driven by a first output shaft, a first differential selectively connected to a second output shaft via a first coupling device, a second motor driven by a second differential, a second differential driven by a fourth output shaft, and a second differential selectively connected to a third output shaft via a second coupling device. The first motor can simultaneously drive both the first and second output shafts to achieve a centralized drive mode, and the second motor can simultaneously drive both the third and fourth output shafts to achieve a centralized drive mode. Furthermore, along a first direction, the first coupling device is located at one end of the first differential in the first direction, and the second coupling device is located at the other end of the second differential in the first direction. The first motor can drive the first output shaft to output drive force, and the second motor can drive the fourth output shaft to output drive force to achieve a distributed drive mode. This enables both centralized and distributed drive modes, providing flexible transmission and requiring only two drive motors. The structure is relatively simple, production costs are low, and it facilitates a wider range of applications.

[0009] In some examples of the present invention, the first differential includes: a first housing, a first half-shaft and a first differential gear, the first motor is drivenly connected to the first housing, the first differential gear is drivenly connected to the first housing, the first output shaft and the first half-shaft, and the first half-shaft is selectively connected to the second output shaft through the first coupling device.

[0010] In some examples of the present invention, when the first half-shaft is disconnected from the second output shaft, the first half-shaft is connected to the first housing via the first coupling device.

[0011] In some examples of the present invention, the first coupling device includes: a first coupling member, a second coupling member, and a third coupling member, wherein the first coupling member is disposed on the first half-shaft, the second coupling member is fixedly disposed on the second output shaft, and the third coupling member is fixedly disposed on the first housing, and the first coupling member is selectively coupled with the second coupling member or the third coupling member.

[0012] In some examples of the present invention, the second differential includes: a second housing, a second half-shaft and a second differential gear, the second motor is drivenly connected to the second housing, the second differential gear is drivenly connected to the second housing, the fourth output shaft and the second half-shaft, and the second half-shaft is selectively connected to the third output shaft through the second coupling device.

[0013] In some examples of the present invention, when the second half-shaft is disconnected from the third output shaft, the second half-shaft is connected to the second housing via the second coupling device.

[0014] In some examples of the present invention, the second coupling device includes a fourth coupling member, a fifth coupling member, and a sixth coupling member, wherein the fourth coupling member is disposed on the second half-shaft, the fifth coupling member is fixed to the third output shaft, and the sixth coupling member is fixed to the second housing, and the fourth coupling member is selectively coupled to the fifth coupling member or the sixth coupling member.

[0015] In some examples of the present invention, the first power drive device and the second power drive device are arranged opposite or offset along the second direction.

[0016] In some examples of the present invention, the power drive system further includes: a first clutch, wherein the first motor and the first differential are selectively connected via the first clutch; and / or, the power drive system further includes: a second clutch, wherein the second motor and the second differential are selectively connected via the second clutch.

[0017] The present invention further proposes a vehicle.

[0018] The vehicle according to the present invention includes: a first wheel, a second wheel, a third wheel, a fourth wheel, and the aforementioned power drive system; the first wheel is drivenly connected to a first output shaft, the second wheel is drivenly connected to a second output shaft, the third wheel is drivenly connected to a third output shaft, and the fourth wheel is drivenly connected to a fourth output shaft; wherein the first wheel and the fourth wheel are two wheels in a diagonal direction of the vehicle, and the second wheel and the third wheel are two wheels in a diagonal direction of the vehicle.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the power drive system according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the resultant force of the power drive system according to an embodiment of the present invention, with the center pointing forward;

[0023] Figure 3This is a schematic diagram showing that the resultant force of the power drive system according to an embodiment of the present invention is equivalent to torque.

[0024] Figure label:

[0025] Power drive system 100;

[0026] First wheel 11; First output shaft 111;

[0027] Second wheel 12; Second output shaft 121;

[0028] Third wheel 13; Third output shaft 131;

[0029] Fourth wheel 14; Fourth output shaft 141;

[0030] First power drive device 15; Second power drive device 16;

[0031] First motor 20;

[0032] First differential 30; first housing 31; first half-shaft 32; first bevel gear 33; second bevel gear 34; first mating gear 36; second mating gear 37;

[0033] Second motor 40;

[0034] Second differential 50; second housing 51; second half shaft 52; third bevel gear 53; fourth bevel gear 54; third mating gear 56; fourth mating gear 57;

[0035] First gear 61; Second gear 62; Third gear 63; Fourth gear 64;

[0036] Second clutch 70;

[0037] First connecting device 80; first connecting member 81; second connecting member 82; third connecting member 83;

[0038] Second connecting device 90; fourth connecting member 91; fifth connecting member 92; sixth connecting member 93. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] The following is for reference. Figure 1 A power drive system 100 according to an embodiment of the present invention is described.

[0041] like Figure 1 As shown, the power drive system 100 of this embodiment includes: a first drive assembly and a second drive assembly. The first drive assembly includes: a first output shaft 111, a first power drive device 15, and a second output shaft 121 arranged sequentially along a first direction. The second drive assembly includes a third output shaft 131, a second power drive device 16, and a fourth output shaft 141 arranged sequentially along the first direction. The first direction can be... Figure 1 Y direction shown.

[0042] The first power drive device 15 includes: a first motor 20, a first differential 30, and a first coupling device 80. The first motor 20 is drivenly connected to the first differential 30, the first differential 30 is drivenly connected to the first output shaft 111, and the first differential 30 is selectively connected to the second output shaft 121 through the first coupling device 80. Specifically, the selective connection between the first differential 30 and the second output shaft 121 through the first coupling device 80 can be understood as the first differential 30 and the second output shaft 121 being able to be drivenly connected or disconnected. When the first differential 30 is disconnected from the second output shaft 121, the first differential 30 is only drivenly connected to the first output shaft 111.

[0043] The second power drive device 16 includes: a second motor 40, a second differential 50, and a second coupling device 90. The second motor 40 is drivenly connected to the second differential 50, the second differential 50 is drivenly connected to the fourth output shaft 141, and the second differential 50 is selectively connected to the third output shaft 131 through the second coupling device 90. Specifically, the selective connection between the second differential 50 and the third output shaft 131 through the second coupling device 90 can be understood as the second differential 50 and the third output shaft 131 being able to be drivenly connected or disconnected. When the second differential 50 is disconnected from the third output shaft 131, the second differential 50 is only drivenly connected to the fourth output shaft 141.

[0044] The first drive assembly and the second drive assembly are arranged spaced apart along a second direction, wherein the second direction can be... Figure 1 The X-direction shown is perpendicular to the second direction. Along the first direction, the first engagement device 80 is located at one end of the first differential 30 in the first direction, specifically near the end close to the second output shaft 121; the second engagement device 90 is located at the other end of the second differential 50 in the first direction, specifically near the end close to the third output shaft 131. Figure 1 In other words, the first engagement device 80 is located at the right end of the first differential 30, and the second engagement device 90 is located at the left end of the second differential 50, or the first engagement device 80 is located at the left end of the first differential 30, and the second engagement device 90 is located at the right end of the second differential 50.

[0045] The power drive system 100 proposed in this application has a centralized drive mode and a distributed drive mode. Specifically, an example of the centralized drive mode can be: the first differential 30 is simultaneously connected to the first output shaft 111 and the second output shaft 121, in which case the first motor 20 can simultaneously drive the first output shaft 111 and the second output shaft 121 to output driving force, this drive method is the centralized drive mode; or the second differential 50 is simultaneously connected to the third output shaft 131 and the fourth output shaft 141, in which case the second motor 40 can simultaneously drive the third output shaft 131 and the fourth output shaft 141. Output shaft 131 and fourth output shaft 141 output driving force, this driving method is a centralized driving mode; or when the first differential 30 is simultaneously connected to the first output shaft 111 and the second output shaft 121, and the second differential 50 is simultaneously connected to the third output shaft 131 and the fourth output shaft 141, at this time, the first motor 20 can simultaneously drive the first output shaft 111 and the second output shaft 121 to output driving force, and the second motor 40 can simultaneously drive the third output shaft 131 and the fourth output shaft 141 to output driving force, this driving method is a centralized driving mode.

[0046] Since the first engagement device 80 is located at one end of the first differential 30 in the first direction and the second engagement device 90 is located at the other end of the second differential 50 in the first direction, when the first differential 30 is only connected to the first output shaft 111 and the second differential 50 is only connected to the fourth output shaft 141, the first motor 20 can drive the first output shaft 111 to output driving force and the second motor 40 can drive the fourth output shaft 141 to output driving force. This driving method is a distributed driving mode.

[0047] The power drive system 100 proposed in this application comprises a first motor 20 driven by a first differential 30, which is driven by a first output shaft 111. The first differential 30 is selectively connected to a second output shaft 121 via a first coupling device 80. A second motor 40 is driven by a second differential 50, which is driven by a fourth output shaft 141. The second differential 50 is selectively connected to a third output shaft 131 via a second coupling device 90. The first motor 20 can simultaneously drive the first output shaft 111 and the second output shaft 121 to output driving force to achieve a centralized drive mode. The second motor 40 can simultaneously drive the third output shaft 131 and the fourth output shaft 141 to output driving force to achieve a centralized drive mode. Furthermore, along the first direction, the first coupling device 80 is located at one end of the first differential 30 in the first direction, and the second coupling device 90 is located at the other end of the second differential 50 in the first direction. The first motor 20 can drive the first output shaft 111 to output driving force, and the second motor 40 can drive the fourth output shaft 141 to output driving force to achieve a distributed drive mode. This enables both centralized and distributed drive modes, providing flexible transmission. Moreover, it only requires two drive motors, resulting in a simpler structure, lower production costs, and a wider range of applications.

[0048] As some embodiments of this application, the first engagement device 80 may be configured as a clutch or a synchronizer, and the second engagement device 90 may be configured as a clutch or a synchronizer.

[0049] In some embodiments of the present invention, such as Figure 1 As shown, the first differential 30 includes a first housing 31, a first half-shaft 32, and a first differential gear. The first motor 20 is connected to the first housing 31 via a transmission connection. In some embodiments of this application, the output shaft of the first motor 20 and the first housing 31 can be connected via a gear transmission.

[0050] The first differential gear is connected to the first housing 31, the first output shaft 111, and the first half-shaft 32. In some embodiments of this application, the first differential gear is fixedly connected to the first output shaft 111. In some embodiments of this application, the first differential gear is fixedly connected to the first half-shaft 32. The first half-shaft 32 is selectively connected to the second output shaft 121 via a first coupling device 80.

[0051] As some embodiments of this application, such as Figure 1As shown, the first differential gear includes a first bevel gear 33 and a second bevel gear 34. The first bevel gear 33 is driven by the first output shaft 111. In some embodiments of this application, the first bevel gear 33 is fixedly connected to the first output shaft 111. The second bevel gear 34 is driven by the first half-shaft 32. In some embodiments of this application, the second bevel gear 34 is fixedly connected to the first half-shaft 32. The first half-shaft 32 can be selectively driven by the second output shaft 121.

[0052] By connecting the first motor 20 to the first housing 31, and connecting the first differential gear to the first housing 31, the first output shaft 111, and the first half-shaft 32, and selectively connecting the first half-shaft 32 to the second output shaft 121 via the first coupling device 80, the first motor 20 can drive the first housing 31 to rotate. The rotation of the first housing 31 drives the first differential gear to rotate, which in turn drives the first output shaft 111 to output driving force. Thus, the first motor 20 can drive the first output shaft 111 to output driving force. Furthermore, the rotation of the first differential gear can drive the first half-shaft 32 to rotate. When the first half-shaft 32 is connected to the second output shaft 121 via the first coupling device 80, the first half-shaft 32 can drive the second output shaft 121. Therefore, by controlling whether the first half-shaft 32 is engaged with the second output shaft 121, the first motor 20 can selectively drive the second output shaft 121 to output driving force.

[0053] As some embodiments of this application, such as Figure 1 As shown, the first bevel gear 33 and the second bevel gear 34 can be spaced apart and face each other along the first direction. Both the first bevel gear 33 and the second bevel gear 34 can be disposed in the first housing 31. The first bevel gear 33 and the second bevel gear 34 are both connected to the first housing 31 in a transmission manner. Furthermore, the first bevel gear 33 and the second bevel gear 34 rotate coaxially with the first housing 31.

[0054] As some embodiments of this application, such as Figure 1 As shown, the first differential 30 also includes a first mating gear 36 and a second mating gear 37. Both the first mating gear 36 and the second mating gear 37 are connected to the first housing 31. The first mating gear 36 meshes with the first bevel gear 33 and the second bevel gear 34, and the second mating gear 37 meshes with the first bevel gear 33 and the second bevel gear 34, so that the first bevel gear 33 and the second bevel gear 34 rotate coaxially with the first housing 31.

[0055] In some embodiments of the present invention, when the first half-shaft 32 is disconnected from the second output shaft 121, the first half-shaft 32 is connected to the first housing 31 via the first coupling device 80. That is, the first half-shaft 32 can be drivenly connected to the second output shaft 121 via the first coupling device 80 to drively connect the first differential 30 to the second output shaft 121, or the first half-shaft 32 can be drivenly connected to the first housing 31 via the first coupling device 80 to self-lock the first differential 30.

[0056] It is understood that the first half-shaft 32 is connected to the first housing 31 through the first coupling device 80, which can make the first half-shaft 32 and the first housing 31 rotate synchronously, so that the first differential 30 self-locks. This allows the first motor 20 to output all its power to the first output shaft 111 when the first half-shaft 32 is disconnected from the second output shaft 121, so that the power drive system 100 proposed in this application has good power performance.

[0057] In some embodiments of the present invention, such as Figure 1 As shown, the first coupling device 80 includes a first coupling member 81, a second coupling member 82 and a third coupling member 83. The first coupling member 81 is disposed on the first half shaft 32, the second coupling member 82 is fixedly disposed on the second output shaft 121, and the third coupling member 83 is fixedly disposed on the first housing 31. The first coupling member 81 can selectively couple with the second coupling member 82 or the third coupling member 83.

[0058] As some embodiments of this application, the third connector 83 can be integrally formed with the first housing 31, that is, the third connector 83 and the first housing 31 can be constructed as an integrally formed part. The integrally formed part has good structural strength. By making the third connector 83 and the first housing 31 integrally formed, the connection reliability between the third connector 83 and the first housing 31 can be improved, and the probability of breakage at the connection between the third connector 83 and the first housing 31 can be reduced.

[0059] The first coupling member 81 can move relative to the first half-shaft 32. Specifically, the first coupling member 81 can move relative to the first half-shaft 32 along the extension direction of the first half-shaft 32. Furthermore, the first coupling member 81 can move toward the second coupling member 82 to engage with the second coupling member 82, so that the first differential 30 is connected to the second output shaft 121 for transmission. Moreover, the first coupling member 81 can move toward the third coupling member 83 to engage with the third coupling member 83, so that the first differential 30 is self-locking.

[0060] As some embodiments of this application, the first coupling member 81 can be controlled to move toward the second coupling member 82 or toward the third coupling member 83 by an actuator.

[0061] This configuration allows the first coupling 81 to engage with the second coupling 82 by controlling its movement, enabling the first motor 20 to drive the second output shaft 121 to output driving force. Furthermore, by controlling the first coupling 81 to move, it can engage with the third coupling 83, causing the first half-shaft 32 to rotate synchronously with the first housing 31, thus enabling the first differential 30 to self-lock. This configuration makes the structure of the power drive system 100 more reasonable and helps to reduce the design and structural complexity of the actuator.

[0062] In some embodiments of the present invention, such as Figure 1 As shown, the power drive system 100 also includes a first gear 61 and a second gear 62, and the first motor 20 has an output shaft.

[0063] As some embodiments of this application, the output shaft of the first motor 20 is connected to the first gear 61 in a transmission connection. For example, the output shaft of the first motor 20 is directly connected to the first gear 61.

[0064] As some embodiments of this application, the output shaft of the first motor 20 is selectively connected to the first gear 61. For example, the power drive system 100 further includes a first drive shaft and a first clutch, wherein the output shaft of the first motor 20 is selectively connected to the first drive shaft via the first clutch, and the first drive shaft is connected to the first gear 61. The selective connection of the first motor 20 to the first differential 30 via the first clutch can reduce drag losses when the first motor 20 is not involved in driving.

[0065] The second gear 62 engages with the first gear 61 in a transmission manner, and the second gear 62 is fixed to the first housing 31. As some embodiments of this application, the second gear 62 is fixed to the first housing 31 by bolts or is integrally formed with the first housing 31.

[0066] The power output from the first motor 20 can be reliably and smoothly transmitted to the first housing 31 through the first gear 61 and the second gear 62, thereby stably driving the first output shaft 111 to output driving force. Furthermore, when the first differential 30 is connected to the second output shaft 121 through the first coupling device 80, the second output shaft 121 can be stably driven to output driving force, thereby making the power transmission of the power drive system 100 stable and reliable.

[0067] In some embodiments of the present invention, as shown in the figure, the number of teeth of the first gear 61 is less than the number of teeth of the second gear 62. That is, the first gear 61 and the second gear 62 can be constructed as a reduction gear set. By making the number of teeth of the first gear 61 less than the number of teeth of the second gear 62, the effect of speed reduction and torque increase can be achieved to improve power performance.

[0068] In some embodiments of the present invention, such as Figure 1 As shown, the second differential 50 includes a second housing 51, a second half-shaft 52, and a second differential gear. The second motor 40 is connected to the second housing 51 via a transmission connection. In some embodiments of this application, the output shaft of the second motor 40 and the second housing 51 can be connected via a gear transmission.

[0069] The second differential gear is connected to the second housing 51, the fourth output shaft 141, and the second half-shaft 52. In some embodiments of this application, the second differential gear is fixedly connected to the fourth output shaft 141. In some embodiments of this application, the second differential gear is fixedly connected to the second half-shaft 52. The second half-shaft 52 is selectively connected to the third output shaft 131 via a second coupling device 90.

[0070] As some embodiments of this application, such as Figure 1 As shown, the second differential gear includes a third bevel gear 53 and a fourth bevel gear 54. The fourth bevel gear 54 is driven by the fourth output shaft 141. As some embodiments of this application, the fourth bevel gear 54 is fixedly connected to the fourth output shaft 141. The third bevel gear 53 is driven by the second half-shaft 52. As some embodiments of this application, the third bevel gear 53 is fixedly connected to the second half-shaft 52, and the second half-shaft 52 can be selectively driven by the third output shaft 131.

[0071] By connecting the second motor 40 to the second housing 51, and connecting the second differential gear to the second housing 51, the fourth output shaft 141, and the second half-shaft 52, and selectively connecting the second half-shaft 52 to the third output shaft 131 via the second coupling device 90, the second motor 40 can drive the second housing 51 to rotate. The rotation of the second housing 51 can drive the second differential gear to rotate, and the rotation of the second differential gear can drive the fourth output shaft 141 to output driving force. Thus, the second motor 40 can drive the fourth output shaft 141 to output driving force. Furthermore, the rotation of the second differential gear can drive the second half-shaft 52 to rotate. When the second half-shaft 52 is connected to the third output shaft 131 via the second coupling device 90, the second half-shaft 52 can drive the third output shaft 131. Therefore, by controlling whether the second half-shaft 52 is engaged with the third output shaft 131, the second motor 40 can selectively drive the third output shaft 131 to output driving force.

[0072] As some embodiments of this application, such as Figure 1 As shown, the third bevel gear 53 and the fourth bevel gear 54 can be spaced apart and face each other along the first direction. Both the third bevel gear 53 and the fourth bevel gear 54 can be disposed in the second housing 51. The third bevel gear 53 and the fourth bevel gear 54 are both connected to the second housing 51 in a transmission manner. Furthermore, the third bevel gear 53 and the fourth bevel gear 54 rotate coaxially with the second housing 51.

[0073] As some embodiments of this application, such as Figure 1 As shown, the second differential 50 also includes a third mating gear 56 and a fourth mating gear 57. Both the third mating gear 56 and the fourth mating gear 57 are connected to the second housing 51. Furthermore, the third mating gear 56 meshes with the third bevel gear 53 and the fourth bevel gear 54, and the fourth mating gear 57 meshes with the third bevel gear 53 and the fourth bevel gear 54, so that the third bevel gear 53 and the fourth bevel gear 54 rotate coaxially with the second housing 51.

[0074] In some embodiments of the present invention, when the second half-shaft 52 is disconnected from the third output shaft 131, the second half-shaft 52 is connected to the second housing 51 via the second coupling device 90. That is, the second half-shaft 52 can be drivenly connected to the third output shaft 131 via the second coupling device 90 to drively connect the second differential 50 to the third output shaft 131, or the second half-shaft 52 can be drivenly connected to the second housing 51 via the second coupling device 90 to self-lock the second differential 50.

[0075] It is understood that the second half-shaft 52 is connected to the second housing 51 through the second coupling device 90, which can make the second half-shaft 52 and the second housing 51 rotate synchronously, so that the second differential 50 self-locks. This allows the second motor 40 to output all its power to the fourth output shaft 141 when the second half-shaft 52 is disconnected from the third output shaft 131, so that the power drive system 100 proposed in this application has good power performance.

[0076] In some embodiments of the present invention, such as Figure 1 As shown, the second coupling device 90 includes a fourth coupling member 91, a fifth coupling member 92 and a sixth coupling member 93. The fourth coupling member 91 is disposed on the second half shaft 52, the fifth coupling member 92 is fixedly disposed on the third output shaft 131, and the sixth coupling member 93 is fixedly disposed on the second housing 51. The fourth coupling member 91 can selectively couple with the fifth coupling member 92 or the sixth coupling member 93.

[0077] As some embodiments of this application, the sixth connector 93 can be integrally formed with the second housing 51, that is, the sixth connector 93 and the second housing 51 can be constructed as an integrally formed part. The integrally formed part has good structural strength. By making the sixth connector 93 and the second housing 51 integrally formed, the connection reliability between the sixth connector 93 and the second housing 51 can be improved, and the probability of breakage at the connection between the sixth connector 93 and the second housing 51 can be reduced.

[0078] The fourth coupling member 91 can move relative to the second half-shaft 52. Specifically, the fourth coupling member 91 can move relative to the second half-shaft 52 along the extension direction of the second half-shaft 52. Furthermore, the fourth coupling member 91 can move toward the fifth coupling member 92 to engage with the fifth coupling member 92, so that the second differential 50 is connected to the third output shaft 131. Moreover, the fourth coupling member 91 can move toward the sixth coupling member 93 to engage with the sixth coupling member 93, so that the second differential 50 is self-locking.

[0079] As some embodiments of this application, the fourth coupling 91 can be controlled to move toward the fifth coupling 92 or toward the sixth coupling 93 by an actuator.

[0080] This configuration allows the fourth coupling 91 to engage with the fifth coupling 92 by controlling its movement, enabling the second motor 40 to drive the third output shaft 131 to output driving force. Furthermore, by controlling the fourth coupling 91 to move, it can engage with the sixth coupling 93, causing the second half-shaft 52 to rotate synchronously with the second housing 51, thus enabling the second differential 50 to self-lock. This configuration makes the structure of the power drive system 100 more reasonable, which helps to reduce the design complexity and structural complexity of the actuator.

[0081] In some embodiments of the present invention, such as Figure 1 As shown, the power drive system 100 also includes a third gear 63 and a fourth gear 64, and the second motor 40 has an output shaft.

[0082] As some embodiments of this application, the output shaft of the second motor 40 is connected to the third gear 63 in a transmission connection. For example, the output shaft of the second motor 40 is directly connected to the third gear 63.

[0083] As some embodiments of this application, the output shaft of the second motor 40 is selectively connected to the third gear 63. For example, the power drive system 100 further includes a second drive shaft and a second clutch 70, wherein the output shaft of the second motor 40 is selectively connected to the second drive shaft via the second clutch 70, and the second drive shaft is connected to the third gear 63. The second motor 40 is selectively connected to the second differential 50 via the second clutch 70, which can reduce drag losses when the second motor 40 is not involved in driving.

[0084] The fourth gear 64 meshes with the third gear 63, and the fourth gear 64 is fixed to the second housing 51. As some embodiments of this application, the fourth gear 64 is fixed to the second housing 51 by bolts or integrally formed with the second housing 51.

[0085] The power output from the second motor 40 can be reliably and smoothly transmitted to the second housing 51 through the third gear 63 and the fourth gear 64, thereby stably driving the fourth output shaft 141 to output driving force. Furthermore, when the second differential 50 is connected to the third output shaft 131 through the second coupling device 90, the third output shaft 131 can be stably driven to output driving force, thereby making the power transmission of the power drive system 100 stable and reliable.

[0086] In some embodiments of the present invention, such as Figure 1 As shown, the number of teeth of the third gear 63 is less than the number of teeth of the fourth gear 64. That is to say, the third gear 63 and the fourth gear 64 can be constructed as a reduction gear set. By making the number of teeth of the third gear 63 less than the number of teeth of the fourth gear 64, the effect of speed reduction and torque increase can be achieved to improve power performance.

[0087] In some embodiments of the present invention, such as Figure 1 As shown, along the second direction, the first power drive device 15 and the second power drive device 16 are arranged opposite each other or staggered.

[0088] Along the second direction, the first power drive unit 15 and the second power drive unit 16 are arranged opposite each other or staggered. Furthermore, one of the first power drive unit 15 and the second power drive unit 16 can be arranged on the front axle, and the other of the first power drive unit 15 and the second power drive unit 16 can be arranged on the rear axle.

[0089] Specifically, a plane is defined that is perpendicular to the second direction, i.e., the normal of the plane is parallel to the second direction. When the first power drive device 15 and the second power drive device 16 are arranged facing each other, the orthographic projections of the first power drive device 15 and the second power drive device 16 on the plane completely coincide. When the first power drive device 15 and the second power drive device 16 are arranged in a staggered manner, the orthographic projections of the first power drive device 15 and the second power drive device 16 on the plane do not completely coincide or do not coincide.

[0090] Since the first power drive device 15 and the second power drive device 16 can be arranged facing each other or staggered along the second direction, the first power drive device 15 and the second power drive device 16 can have multiple arrangement methods, which helps to reduce the difficulty of arranging the first power drive device 15 and the second power drive device 16. Furthermore, the arrangement method of the first power drive device 15 and the second power drive device 16 can be selected according to actual needs, so as to improve the applicability of the power drive system 100.

[0091] In some embodiments of the present invention, the power drive system 100 further includes: a first clutch, wherein the first motor 20 and the first differential 30 are selectively connected via the first clutch;

[0092] And / or, the power drive system 100 further includes: a second clutch 70, through which the second motor 40 and the second differential 50 are selectively connected.

[0093] By selectively connecting the first motor 20 to the first differential 30 via the first clutch, drag losses when the first motor 20 is not involved in driving can be reduced. By selectively connecting the second motor 40 to the second differential 50 via the second clutch 70, drag losses when the second motor 40 is not involved in driving can be reduced.

[0094] Vehicles according to embodiments of the present invention, such as Figure 1 As shown, the system includes a first wheel 11, a second wheel 12, a third wheel 13, a fourth wheel 14, and the power drive system 100 of the above embodiment. The first wheel 11 is driven to the first output shaft 111, the second wheel 12 is driven to the second output shaft 121, the third wheel 13 is driven to the third output shaft 131, and the fourth wheel 14 is driven to the fourth output shaft 141. The first wheel 11 and the fourth wheel 14 are two wheels in the diagonal direction of the vehicle, and the second wheel 12 and the third wheel 13 are two wheels in the diagonal direction of the vehicle.

[0095] As some embodiments of this application, along a first direction (which can be understood as the width direction of the vehicle), the first wheel 11 and the second wheel 12 can be arranged facing each other and spaced apart, and the third wheel 13 and the fourth wheel 14 can be arranged facing each other and spaced apart. Furthermore, along a second direction (which can be understood as the length direction of the vehicle), the first wheel 11 can be located directly in front of the third wheel 13 (the first wheel 11 and the third wheel 13 are facing each other), and the second wheel 12 can be located directly in front of the fourth wheel 14 (the second wheel 12 and the fourth wheel 14 are facing each other). That is, the first wheel 11 and the fourth wheel 14 are two wheels diagonally opposite to each other in the vehicle's direction, and the second wheel 12 and the third wheel 13 are two wheels diagonally opposite to each other in the vehicle's direction.

[0096] As some embodiments of this application, along the first direction, the first wheel 11 and the second wheel 12 can be arranged facing each other and spaced apart, and the third wheel 13 and the fourth wheel 14 can be arranged facing each other and spaced apart. Furthermore, along the second direction, the first wheel 11 can be located directly behind the third wheel 13 (the first wheel 11 and the third wheel 13 are facing each other), and the second wheel 12 can be located directly behind the fourth wheel 14 (the second wheel 12 and the fourth wheel 14 are facing each other). That is, the first wheel 11 and the fourth wheel 14 are two wheels diagonally opposite to each other in the vehicle, and the second wheel 12 and the third wheel 13 are two wheels diagonally opposite to each other in the vehicle.

[0097] One of the first power drive unit 15 and the second power drive unit 16 can be arranged on the front axle, and the other of the first power drive unit 15 and the second power drive unit 16 can be arranged on the rear axle.

[0098] This article describes an example where the first wheel 11 is located directly in front of the third wheel 13 (the first wheel 11 and the third wheel 13 are directly opposite each other), the second wheel 12 is located directly in front of the fourth wheel 14 (the second wheel 12 and the fourth wheel 14 are directly opposite each other), the first power drive unit 15 is arranged on the front axle, and the second power unit is arranged on the rear axle.

[0099] The power drive system 100 proposed in this application can have multiple operating modes, including but not limited to front-wheel drive mode, rear-wheel drive mode, four-wheel drive mode, and distributed drive mode. The specific operating states of the power drive system 100 under various operating modes are described in detail below.

[0100] In front-wheel drive mode, the first differential 30 is drive-connected to the second output shaft 121, and the first motor 20 drives the first differential 30 to drive the first output shaft 111 and the second output shaft 121. Furthermore, in embodiments where the second motor 40 is selectively connected to the second differential 50 via a second clutch 70, the second motor 40 is disconnected from the second differential 50 in front-wheel drive mode.

[0101] In rear-wheel drive mode, the second differential 50 is drive-connected to the third output shaft 131, and the second motor 40 drives the second differential 50 to drive the third output shaft 131 and the fourth output shaft 141. Furthermore, in embodiments where the first motor 20 and the first differential 30 are selectively connected via a first clutch, in rear-wheel drive mode, the first motor 20 is disconnected from the first differential 30.

[0102] In four-wheel drive mode, the first differential 30 is driven by the second output shaft 121, the first motor 20 drives the first differential 30 to drive the first output shaft 111 and the second output shaft 121, the second differential 50 is driven by the third output shaft 131, and the second motor 40 drives the second differential 50 to drive the third output shaft 131 and the fourth output shaft 141.

[0103] In the distributed drive mode, the first differential 30 and the second output shaft 121 are not connected in drive, and the second differential 50 and the third output shaft 131 are not connected in drive. This allows the first motor 20 to drive the first wheel 11 (left front wheel) and the second motor 40 to drive the fourth wheel 14 (right rear wheel), enabling a U-turn function in this mode. Furthermore, in this mode, both the first differential 30 and the second differential 50 can self-lock to ensure good power performance when the vehicle is in distributed drive mode.

[0104] It should be noted that the descriptions of the various working modes described above are merely illustrative and do not imply that the power drive system 100 proposed in this application is limited to the above working modes, nor do they imply that the power drive system 100 proposed in this application is limited by the above working modes.

[0105] like Figure 2 As shown, according to the principle of mechanics, the first differential 30 is connected to the first output shaft 111 for transmission, and the second differential 50 is connected to the fourth output shaft 141 for transmission, and applies the same driving force to the first wheel 11 and the fourth wheel 14. The resultant force of the vehicle is equivalent to the driving force from the center forward, and the vehicle maintains a straight forward state.

[0106] like Figure 3 As shown, according to the principle of mechanics, the first differential 30 is only connected to the first output shaft 111 and the second differential 50 is only connected to the fourth output shaft 141. It applies a positive driving force to the first wheel 11 and a reverse driving force to the fourth wheel 14. The two wheels are controlled at the same speed according to the speed ring. The resultant force of the vehicle is equivalent to torque. The vehicle's driving state is a stationary rotation and turning around.

[0107] As the electrification of the automotive industry matures, electric drive replacing traditional internal combustion engine drive has become an unstoppable trend. Compared to traditional internal combustion engine drive, electric drive is more flexible and faster in control, the power system responds more quickly, and electric drive has relatively lower requirements for transmission. Therefore, it can easily achieve many drive functions that are difficult for traditional internal combustion engines to achieve.

[0108] Common electric drive modes include centralized drive and distributed drive. Distributed drive is more flexible than centralized drive, such as enabling U-turns on the spot. Currently, mass-produced vehicles on the market that have distributed drive mode or both of these drive modes are basically high-end models. However, in order to implement distributed drive mode or have both distributed and centralized drive modes, it is usually necessary to equip each wheel with a drive motor, which seriously increases the production cost of the vehicle and makes it difficult to extend this function to mid-to-low-end models. Therefore, there is an urgent need to develop a lower-cost power drive system to achieve the aforementioned functions.

[0109] This application reduces the number of drive motors by two. Although it adds a first differential 30, a first engagement device 80, a second differential 50, and a second engagement device 90, the cost of the differentials and engagement devices is far lower than the cost of the drive motors. Furthermore, the higher the power density and output torque of the drive motor, the higher its cost. Therefore, overall, the power drive system of this application significantly reduces the cost. In addition, since the first engagement device 80 is located at one end of the first differential 30 in the first direction and the second engagement device 90 is located at the other end of the second differential 50 in the first direction, the structural design and layout can be made more reasonable. Through reasonable structural design and layout, both centralized drive mode and distributed drive mode can be realized, making it possible to install this function in low- and mid-range models.

[0110] As some embodiments of this application, the vehicle may default to front-wheel drive mode when starting. As some embodiments of this application, the vehicle may default to distributed drive mode when starting.

[0111] As some embodiments of this application, if the current mode is front-wheel drive and you want to switch to four-wheel drive mode, the fourth coupling member 91 and the fifth coupling member 92 can be engaged to switch from front-wheel drive to four-wheel drive mode.

[0112] As some embodiments of this application, if the current mode is front-drive mode, to switch to distributed drive mode, the fourth coupling 91 and the sixth coupling 93 are engaged to make the second differential 50 self-lock, the first motor 20 de-torques, the first coupling 81 and the second coupling 82 are quickly disengaged and engaged with the third coupling 83 to make the first differential 30 self-lock, and after the first coupling 81 and the third coupling 83 are engaged, the first motor 20 quickly restores torque.

[0113] As some embodiments of this application, if the current mode is four-wheel drive mode, to switch to distributed drive mode, the first motor 20 de-torques, the first coupling 81 and the second coupling 82 quickly disengage and engage with the third coupling 83 to make the first differential 30 self-lock. After the first coupling 81 and the third coupling 83 engage, the first motor 20 quickly restores torque. In addition, the second motor 40 de-torques, the fourth coupling 91 and the fifth coupling 92 quickly disengage and engage with the sixth coupling 93 to make the second differential 50 self-lock. After the fourth coupling 91 and the sixth coupling 93 engage, the second motor 40 quickly restores torque.

[0114] As some embodiments of this application, with the help of certain algorithms, the power drive system 100 proposed in this application can also realize vehicle instability control. For example, in four-wheel drive mode, when the first wheel 11 and the second wheel 12 are oversteering and unstable, additional torque can be applied to one side wheel to adjust and control the vehicle attitude.

[0115] The vehicle proposed in this application, by applying the aforementioned power drive system 100, can achieve a distributed drive mode at low cost, or simultaneously possess both distributed and centralized drive modes, which is beneficial for its installation in low- and mid-range models.

[0116] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0117] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0118] In the description of this invention, "a plurality of" means two or more.

[0119] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0120] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0122] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A power drive system, characterized in that, include: A first drive assembly, comprising: a first output shaft, a first power drive device, and a second output shaft arranged sequentially along a first direction; the first power drive device comprising: a first motor, a first differential, and a first coupling device; the first motor being drivenly connected to the first differential; the first differential being drivenly connected to the first output shaft; and the first differential being selectively connected to the second output shaft via the first coupling device. The second drive assembly includes a third output shaft, a second power drive device, and a fourth output shaft arranged sequentially along the first direction. The second power drive device includes a second motor, a second differential, and a second coupling device. The second motor is drivenly connected to the second differential, the second differential is drivenly connected to the fourth output shaft, and the second differential is selectively connected to the third output shaft through the second coupling device. The first drive assembly and the second drive assembly are arranged spaced apart along the second direction. Along the first direction, the first engagement device is located at one end of the first differential in the first direction, and the second engagement device is located at the other end of the second differential in the first direction. The first direction is perpendicular to the second direction.

2. The power drive system according to claim 1, characterized in that, The first differential includes: a first housing, a first half-shaft, and a first differential gear. The first motor is drivenly connected to the first housing. The first differential gear is drivenly connected to the first housing, the first output shaft, and the first half-shaft. The first half-shaft is selectively connected to the second output shaft through the first coupling device.

3. The power drive system according to claim 2, characterized in that, When the first half-shaft is disconnected from the second output shaft, the first half-shaft is connected to the first housing through the first connecting device.

4. The power drive system according to claim 2, characterized in that, The first coupling device includes a first coupling member, a second coupling member, and a third coupling member. The first coupling member is disposed on the first half-shaft, the second coupling member is fixedly disposed on the second output shaft, and the third coupling member is fixedly disposed on the first housing. The first coupling member can selectively engage with the second coupling member or the third coupling member.

5. The power drive system according to claim 1, characterized in that, The second differential includes: a second housing, a second half-shaft, and a second differential gear. The second motor is drivenly connected to the second housing. The second differential gear is drivenly connected to the second housing, the fourth output shaft, and the second half-shaft. The second half-shaft is selectively connected to the third output shaft through the second coupling device.

6. The power drive system according to claim 5, characterized in that, When the second half-shaft is disconnected from the third output shaft, the second half-shaft is connected to the second housing through the second coupling device.

7. The power drive system according to claim 5, characterized in that, The second coupling device includes a fourth coupling member, a fifth coupling member, and a sixth coupling member. The fourth coupling member is disposed on the second half-shaft, the fifth coupling member is fixed to the third output shaft, and the sixth coupling member is fixed to the second housing. The fourth coupling member can selectively engage with the fifth coupling member or the sixth coupling member.

8. The power drive system according to any one of claims 1-7, characterized in that, Along the second direction, the first power drive device and the second power drive device are arranged facing each other or staggered.

9. The power drive system according to any one of claims 1-7, characterized in that, The power drive system further includes: a first clutch, wherein the first motor and the first differential are selectively connected via the first clutch; And / or, the power drive system further includes: a second clutch, wherein the second motor and the second differential are selectively connected via the second clutch.

10. A vehicle, characterized in that, include: The first wheel, the second wheel, the third wheel, the fourth wheel, and the power drive system according to any one of claims 1-9; The first wheel is driven to the first output shaft, the second wheel is driven to the second output shaft, the third wheel is driven to the third output shaft, and the fourth wheel is driven to the fourth output shaft; Wherein, the first wheel and the fourth wheel are two wheels in the diagonal direction of the vehicle, and the second wheel and the third wheel are two wheels in the diagonal direction of the vehicle.

Images