Power transmission system and vehicle

Abstract

The invention discloses a power transmission system and a vehicle. The power transmission system comprises a first wheel, a second wheel, a third wheel and a fourth wheel, the first motor is arranged to be selectively in power connection with the first wheel or the range extender; the second motor is in power connection with the second wheel or is in power connection with the first wheel and the second wheel at the same time when the first motor is in power connection with the range extender; the third motor is in power connection with a third wheel, and the fourth motor is in power connection with a fourth wheel. According to the power transmission system, independent driving of all the wheels can be achieved, the escape capacity of the whole vehicle can be improved, arrangement of an independent electric generator can be reduced, and when the first motor generates electricity, effective driving of all the wheels can still be guaranteed, and the dynamic property of the vehicle in the electricity generation process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a power transmission system and a vehicle having the power transmission system. Background Art

[0002] With the continuous penetration of new energy technologies, more and more car companies have their own new energy routes. In off-road vehicles, the traditional ICE (internal combustion engine) power has high fuel consumption due to the large displacement of the engine, and it is difficult to meet future fuel consumption regulations. All car companies are exploring new energy technology routes for off-road vehicles. In related technologies, independent motors and range extenders are used to achieve power generation. The number of motors is large, the setting cost is high, and the ability of each wheel to get out of trouble is low, which cannot adapt to relatively complex road conditions. There is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a power transmission system, which can not only drive four wheels independently through four motors to improve the ability to get out of trouble, but also use one of the motors as a range-extending motor to reduce the installation cost.

[0004] According to an embodiment of the present invention, a power transmission system includes: a first wheel, a second wheel, a third wheel and a fourth wheel; a first motor and a range extender, wherein the first motor is configured to be selectively connected to the first wheel or the range extender; a second motor, which is connected to the second wheel or is simultaneously connected to the first wheel and the second wheel when the first motor is connected to the range extender; a third motor and a fourth motor, wherein the third motor is connected to the third wheel and the fourth motor is connected to the fourth wheel.

[0005] According to the power transmission system of the embodiment of the present invention, each wheel can be driven independently, which is beneficial to improving the vehicle's ability to escape from difficulties, and can reduce the setting of a separate generator. When the first motor is generating electricity, it can still ensure the effective driving of each wheel and ensure the power of the vehicle during the power generation process.

[0006] The power transmission system according to some embodiments of the present invention further includes a differential, wherein the differential is provided with a differential case, the first wheel is connected to a first axle, the second wheel is connected to a second axle, one side half-axle of the differential is connected to the second axle, and the other side half-axle of the differential is selectively connected to the first axle; wherein the first motor is selectively power-connected to the first axle, and the second motor is power-connected to the differential case.

[0007] The power transmission system according to some embodiments of the present invention further includes a first synchronizer, a second synchronizer, and a third synchronizer. The first synchronizer is configured to selectively power-connect the first motor to the range extender. The second synchronizer is configured to selectively power-connect the first motor to the first wheel shaft and to selectively lock the first wheel shaft to one half shaft of the differential. The third synchronizer is configured to selectively lock the differential housing to one half shaft of the differential.

[0008] In the power transmission system according to some embodiments of the present invention, a first motor gear is connected to the first motor, and a range gear is sleeved on the output shaft of the range extender. The range gear meshes with the first motor gear, and the first synchronizer is configured to selectively couple or disconnect the range gear from the output shaft; and / or, a first motor gear is connected to the first motor, and a first output gear is provided on the first wheel shaft. The first output gear is power-connected to the first motor gear, and the second synchronizer is configured to selectively couple or disconnect the first output gear from the first wheel shaft.

[0009] The power transmission system according to some embodiments of the present invention further includes a first transmission gear and a second transmission gear coaxially arranged. The first transmission gear meshes with the first motor gear, and the second transmission gear meshes with the first output gear.

[0010] The power transmission system according to some embodiments of the present invention further includes a third transmission gear and a fourth transmission gear coaxially arranged. A second motor gear is connected to the second motor, and a differential gear is provided on the differential housing. The third transmission gear meshes with the second motor gear, and the fourth transmission gear meshes with the differential gear.

[0011] In the power transmission system according to some embodiments of the present invention, the axis of the first wheel shaft coincides with the axis of the second wheel shaft, and the first motor and the second motor are respectively located on the front and rear sides of the second wheel shaft.

[0012] In the power transmission system according to some embodiments of the present invention, a third wheel shaft is connected to the third wheel. A third output gear is provided on the third wheel shaft, and a third motor gear is provided on the third motor. The third motor gear is power-connected to the third output gear through a gear set; a fourth wheel shaft is connected to the fourth wheel. A fourth output gear is provided on the fourth wheel shaft, and a fourth motor gear is provided on the fourth motor. The fourth motor gear is power-connected to the fourth output gear through a gear set.

[0013] A power transmission system according to some embodiments of the present invention, wherein the first wheel and the second wheel are both arranged as front wheels, and the third wheel and the fourth wheel are both arranged as rear wheels; and / or, the range extender and the first motor are both located in front of the front wheel axle, and the second motor is located between the front wheel axle and the rear wheel axle; and / or, the third motor and the fourth motor are both located between the front wheel axle and the rear wheel axle.

[0014] The present invention also provides a vehicle.

[0015] A vehicle according to an embodiment of the present invention is provided with the power transmission system described in any of the above embodiments.

[0016] The advantages of the vehicle and the above power transmission system over the prior art are the same and will not be elaborated here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of a power transmission system according to an embodiment of the present invention.

[0020] Reference Numerals:

[0021] Power transmission system 100,

[0022] First wheel 11, second wheel 12, third wheel 13, fourth wheel 14,

[0023] First motor 21, first motor gear 211, second motor 22, second motor gear 221, third motor 23, third motor gear 231, fourth motor 24, fourth motor gear 241, range extender 25, range extender gear 251,

[0024] First wheel axle 31, first output gear 311, first transmission gear 312, second transmission gear 313, second wheel axle 32, third transmission gear 321, fourth transmission gear 322, third wheel axle 33, third output gear 331, fifth transmission gear 332, sixth transmission gear 333, fourth wheel axle 34, fourth output gear 341, seventh transmission gear 342, eighth transmission gear 343,

[0025] First synchronizer 41, second synchronizer 42, third synchronizer 43,

[0026] Differential 5, left half shaft 51, right half shaft 52, locking gear 53, differential gear 54, differential housing 55. Detailed implementation mode

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the transverse direction of the vehicle, that is, the Y direction; the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0031] The following refers to Figure 1 Describe the power transmission system 100 according to the embodiment of the present invention. By setting the power transmission system 100, the four wheels of the vehicle can be independently driven, so that each wheel has an independent escape ability. At the same time, one of the motors can be used as a range extender motor, and there is no need to set up a separate generator to cooperate with the range extender 25, which is beneficial to reducing the number of motors set and lowering the setting cost.

[0032] AsFigure 1 As shown in Figure 1 , a power transmission system 100 according to an embodiment of the present invention includes: a first wheel 11, a second wheel 12, a third wheel 13, a fourth wheel 14, a first motor 21, a range extender 25, a second motor 22, a third motor 23, and a fourth motor 24.

[0033] The first wheel 11, the second wheel 12, the third wheel 13, and the fourth wheel 14 are respectively the four wheels of a vehicle. In other words, the power transmission system 100 in the present invention is applicable to four-wheel vehicle models, that is, one of the first wheel 11, the second wheel 12, the third wheel 13, and the fourth wheel 14 is a left front vehicle wheel, one is a right front vehicle wheel, one is a left rear vehicle wheel, and one is a right rear vehicle wheel. That is to say, in actual design, the first wheel 11, the second wheel 12, the third wheel 13, and the fourth wheel 14 can be flexibly paired with the left front vehicle wheel, the right front vehicle wheel, the left rear vehicle wheel, and the right rear vehicle wheel. That is, the first wheel 11 is not limited to the left front vehicle wheel and can also be other wheels, and the same is true for other wheels. The setting method is flexibly selectable.

[0034] Among them, the first motor 21 is set to be optionally power-connected to the first wheel 11 or the range extender 25. That is to say, the first motor 21 can be used to drive the first wheel 11 for power output, or can be used to be power-connected to the range extender 25 to drive the first motor 21 for power generation through the range extender 25. The range extender 25 can be an engine or other devices that can be used to drive the motor to generate electricity.

[0035] The second motor 22 is power-connected to the second wheel 12 or is power-connected to both the first wheel 11 and the second wheel 12 when the first motor 21 is power-connected to the range extender 25. That is, the second motor 22 can be used to drive the second wheel 12 alone for power output, or can drive both the first wheel 11 and the second wheel 12 simultaneously when the first motor 21 is used in cooperation with the range extender 25 for power generation, so that the first wheel 11 and the second wheel 12 both have power output whether the first motor 21 generates electricity or not. Thus, during the vehicle driving process, it can operate in a power generation plus driving mode or only in a driving mode.

[0036] The third motor 23 is power-connected to the third wheel 13, and the fourth motor 24 is power-connected to the fourth wheel 14. Thus, the third motor 23 can drive the third wheel 13 alone for power output, and the fourth motor 24 can drive the fourth wheel 14 alone for power output, so that both the third wheel 13 and the fourth wheel 14 can be driven alone. Thus, the power transmission system 100 in the present invention is applicable to four-wheel drive vehicles.

[0037] Therefore, the first wheel 11, the second wheel 12, the third wheel 13 and the fourth wheel 14 in the present invention can all be driven by a separate motor, so that each wheel can rotate independently, which is beneficial to improving the overall escape ability of the vehicle, adapting to different types of operating road conditions, and improving the vehicle's power performance; at the same time, the first motor 21 can be used to drive the first wheel 11 for power driving, and can also be used as a generator to cooperate with the range extender 25 for power, realizing the setting of two functions of the same motor, reducing the setting of a separate power generator, and reducing the setting cost. When the first motor 21 is running as a generator, the second motor 22 can also drive the first wheel 11 and the second wheel 12 for power driving at the same time, which can well avoid the problem that the first wheel 11 cannot be effectively driven when the first motor 21 is used for power generation, ensuring the power state of each wheel, and there is no need for the first motor 21 to be used for power generation and driving at the same time, reducing the working difficulty of the first motor 21 and ensuring the reliability of the power transmission system 100.

[0038] According to the power transmission system 100 of the embodiment of the present invention, each wheel can be driven independently, which is beneficial to improving the vehicle's ability to escape from difficulties, and can reduce the setting of a separate generator. When the first motor 21 is generating electricity, it can still ensure the effective driving of each wheel and ensure the power of the vehicle during the power generation process.

[0039] In some embodiments, Figure 1 As shown, the power transmission system 100 also includes a differential 5, which is provided with a differential case 55, the first wheel 11 is connected to the first wheel axle 31, the second wheel 12 is connected to the second wheel axle 32, one side half shaft of the differential 5 is connected to the second wheel axle 32, and the other side half shaft of the differential 5 is selectively connected to the first wheel axle 31.

[0040] It should be noted that the first axle 31 and the second axle 32 may be two axles arranged opposite to each other in the lateral direction of the vehicle, such as one of the first axle 31 and the second axle 32 is a right front axle and the other is a left front axle, or one of the first axle 31 and the second axle 32 is a right rear axle and the other is a left rear axle.

[0041] As in Figure 1 In the illustrated embodiment, the first wheel axle 31 is the right front wheel axle, the second wheel axle 32 is the left front wheel axle, and the left half shaft 51 of the differential 5 is connected to the left front wheel axle, the right half shaft 52 of the differential 5 can be selectively connected to the right front wheel axle, the first motor 21 is selectively connected to the first wheel axle 31 by power, and the second motor 22 is connected to the differential case 55 by power.

[0042] Thus, when the first motor 21 is not generating electricity, it can be power-connected to the first wheel shaft 31. The first wheel shaft 31 is disconnected from the right half shaft 52 of the differential 5, and the second motor 22 is connected to the differential housing 55. At this time, the first motor 21 can drive the first wheel shaft 31 to rotate, and the second motor 22 can drive the second wheel shaft 32 to rotate through the differential 5, so that the first wheel shaft 31 and the second wheel shaft 32 are both in a rotating state, realizing the driving of the first wheel 11 and the second wheel 12. During this process, the range extender 25 does not work, and the power connection between the range extender 25 and the first motor 21 is disconnected.

[0043] When the first motor 21 is generating electricity, the power connection between the first motor 21 and the first wheel shaft 31 is disconnected, and the second motor 22 is power-connected to the differential housing 55. At this time, the differential housing 55 is connected to both the left half shaft 51 and the right half shaft 52 of the differential 5. Moreover, the left half shaft 51 of the differential 5 can be connected to the second wheel shaft 32, and the right half shaft 52 of the differential 5 can be connected to the first wheel shaft 31, so that the second motor 22 can drive both the first wheel shaft 31 and the second wheel shaft 32 through the differential 5 to achieve power drive.

[0044] In some embodiments, as Figure 1 shown, the power transmission system 100 further includes a first synchronizer 41, a second synchronizer 42, and a third synchronizer 43. The first synchronizer 41 is used to selectively power-connect the first motor 21 and the range extender 25. The second synchronizer 42 is used to selectively power-connect the first motor 21 and the first wheel shaft 31 and to selectively lock the first wheel shaft 31 and one side half shaft of the differential 5. That is, the power connection state between the first motor 21 and the range extender 25 can be controlled by the first synchronizer 41. At the same time, the connection states between the first motor 21 and the first wheel shaft 31, and between the first wheel shaft 31 and one side half shaft of the differential 5 can be controlled by the second synchronizer 42.

[0045] The third synchronizer 43 is used to selectively lock the differential housing 55 and one side half shaft of the differential 5. It can be understood that when the differential housing 55 is separated from one side half shaft of the differential 5, the two side half shafts of the differential 5 can rotate relative to each other to achieve the differential function. When the differential housing 55 is connected to one side half shaft of the differential 5, the two side half shafts of the differential 5 are locked relative to each other and rotate as a whole.

[0046] Specifically, when the first motor 21 generates power, the first synchronizer 41 can power-connect the first motor 21 to the range extender 25. At the same time, the second synchronizer 42 disconnects the first motor 21 from the first axle shaft 31. Meanwhile, the second synchronizer 42 connects the first axle shaft 31 to the right half shaft 52 of the differential 5. The third synchronizer 43 separates the differential case 55 from the right half shaft 52 of the differential 5, so that the second motor 22 can drive the first axle shaft 31 and the second axle shaft 32 respectively through the differential 5, realizing the drive of the first wheel 11 and the second wheel 12, and enabling the first motor 21 to be only used for power generation.

[0047] When the first motor 21 drives the first wheel 11, the first synchronizer 41 disconnects the first motor 21 from the range extender 25. The second synchronizer 42 power-connects the first motor 21 to the first axle shaft 31 and separates the first axle shaft 31 from the right half shaft 52 of the differential 5. The third synchronizer 43 locks the differential case 55 to the right half shaft 52 of the differential 5. The second motor 22 is power-connected to the differential case 55, so that the power output by the first motor 21 is used to drive the first wheel 11 to rotate, and the power output by the second motor 22 is used to drive the second wheel 12 to rotate.

[0048] Thus, when the first motor 21 generates power or drives the first wheel 11, the power requirement for the first motor 21 can be ensured to be relatively low, reducing the load on the first motor 21 and facilitating the extension of the service life of the first motor 21.

[0049] In some embodiments, the first motor 21 is connected to a first motor gear 211. An extender gear 251 is sleeved on the output shaft of the range extender 25. The extender gear 251 meshes with the first motor gear 211. The first synchronizer 41 is used to selectively couple or disconnect the extender gear 251 from the output shaft. As Figure 1 shown, a first motor gear 211 is provided outside the motor shaft of the first motor 21. When the first motor 21 outputs power, the motor shaft can drive the first motor gear 211 to rotate. The extender gear 251 is sleeved outside the output shaft of the range extender 25 and is in an idle fit with the output shaft of the range extender 25. At the same time, the first synchronizer 41 is sleeved outside the output shaft of the range extender 25. The first synchronizer 41 can move relative to the output shaft of the range extender 25 to selectively power-connect the output shaft of the range extender 25 to the extender gear 251.

[0050] And / or, the first motor 21 is connected to a first motor gear 211. The first axle shaft 31 is provided with a first output gear 311. The first output gear 311 is power-connected to the first motor gear 211. The second synchronizer 42 is used to selectively couple or disconnect the first output gear 311 from the first axle shaft 31. As Figure 1As shown in the figure, a first motor gear 211 is provided outside the motor shaft of the first motor 21. When the first motor 21 outputs power, the motor shaft can drive the first motor gear 211 to rotate. At the same time, the first output gear 311 is sleeved outside the first wheel shaft 31 and is in an idle fit with the first wheel shaft 31. At the same time, the second synchronizer 42 is sleeved outside the first wheel shaft 31, and the second synchronizer 42 can move relative to the first wheel shaft 31 to selectively power-connect the first wheel shaft 31 and the first output gear 311.

[0051] And, as Figure 1 shown in the figure, a locking gear 53 is sleeved outside the half shaft on the other side of the differential 5. The locking gear 53 and the differential gear 54 of the differential 5 are coaxially distributed. The third synchronizer 43 is sleeved outside the half shaft on the other side of the differential 5, so that the third synchronizer 43 can selectively lock the locking gear 53 and the half shaft on the other side of the differential 5, so that the differential case 55 and the half shaft on the other side of the differential 5 are locked, which is beneficial to realize the differential unlocking and locking of the half shafts on both sides of the differential 5.

[0052] Specifically, as Figure 1 shown in the figure, in the power generation mode, the first synchronizer 41 can be moved to the left so that the first synchronizer 41 power-connects the range extender gear 251 and the output shaft of the range extender 25. At the same time, the second synchronizer 42 is moved to the left so that the second synchronizer 42 disconnects the first output gear 311 from the first wheel shaft 31, and the second synchronizer 42 connects the first wheel shaft 31 and the other wheel shaft of the differential 5. The third synchronizer 43 moves to the left to separate the differential case 55 from the half shaft on the other side of the differential 5, so that the half shafts on both sides of the differential 5 can rotate differentially, and then the first wheel 11 and the second wheel 12 are simultaneously driven by the second motor 22; at this time, the range extender 25 starts to operate, and the power of the range extender 25 can be transmitted to the range extender gear 251 through its output shaft. The range extender gear 251 meshes with the first motor gear 211 to transmit the power to the first motor gear 211, and then drives the first motor 21 to operate and generate electricity to realize the power generation function, and the first output gear 311 idles and does not output power, ensuring sufficient power generation power.

[0053] When the first motor 21 is in the driving wheel mode, the first synchronizer 41 can be moved to the right, so that the first synchronizer 41 disengages the power of the range extender gear 251 from the output shaft of the range extender 25. At the same time, the second synchronizer 42 is moved to the right, so that the second synchronizer 42 connects the first output gear 311 with the first wheel shaft 31 in a power transmission manner, and the second synchronizer 42 disengages the first wheel shaft 31 from the other side wheel shaft of the differential 5. The third synchronizer 43 moves to the right to lock the differential case 55 with the other side half shaft of the differential 5. At this time, the range extender 25 stops operating, the first motor 21 starts to operate and outputs driving force. The first motor gear 211 can drive the first output gear 311 to rotate, and the first output gear 311 drives the first wheel shaft 31 to rotate through the second synchronizer 42. The first motor 21 realizes the driving of the first wheel 11. The second motor 22 drives the second wheel 12 to rotate, and the range extender gear 251 is idling and will not exert reverse force towards the range extender 25, ensuring sufficient power for driving the first wheel 11.

[0054] In some embodiments, the power transmission system 100 further includes a first transmission gear 312 and a second transmission gear 313 arranged coaxially. The first transmission gear 312 meshes with the first motor gear 211, and the second transmission gear 313 meshes with the first output gear 311, so that the first motor gear 211 and the first output gear 311 can transmit power through the first transmission gear 312 and the second transmission gear 313.

[0055] It should be noted that the gear sizes of the first transmission gear 312 and the second transmission gear 313 are different, and as Figure 1 shown, the outer diameter of the first transmission gear 312 is larger than the outer diameter of the second transmission gear 313. Thus, after the first motor gear 211 transmits power through the first transmission gear 312 and the second transmission gear 313, a certain speed ratio output can be achieved, so as to realize the powerful driving of the first wheel 11 and change the power direction from the first motor gear 211 to the first output gear 311.

[0056] In specific settings, the first transmission gear 312 and the second transmission gear 313 are arranged at intervals in the lateral direction of the vehicle, and the first transmission gear 312 and the second transmission gear 313 are arranged longitudinally between the first motor gear 211 and the first output gear 311 in the longitudinal direction of the vehicle, so as to reasonably utilize the space in the longitudinal direction of the vehicle and avoid the transverse installation space of the vehicle from being too compact.

[0057] In some embodiments, the powertrain 100 further includes a third transmission gear 321 and a fourth transmission gear 322. The third transmission gear 321 and the fourth transmission gear 322 are coaxially arranged. The second motor 22 is connected with a second motor gear 221. The differential 5 may be provided with a differential gear 54. The third transmission gear 321 meshes with the second motor gear 221, and the fourth transmission gear 322 meshes with the differential gear 54.

[0058] Specifically, as Figure 1 shown, the second motor gear 221 is arranged on the motor shaft of the second motor 22 and is fixedly connected to the motor shaft, so that the second motor 22 can drive the second motor gear 221 to rotate. At the same time, the third transmission gear 321 and the fourth transmission gear 322 are power-connected between the second motor gear 221 and the differential gear 54, so that the second motor 22 can drive the differential housing 55 to rotate, which is beneficial to driving the second wheel shaft 32 and the first wheel shaft 31 to rotate.

[0059] It should be noted that the gear sizes of the third transmission gear 321 and the fourth transmission gear 322 are different. And as Figure 1 shown, the outer diameter of the third transmission gear 321 is larger than the outer diameter of the fourth transmission gear 322. Thus, after the power is transmitted through the third transmission gear 321 and the fourth transmission gear 322 by the second motor gear 221, a certain speed ratio output can be achieved, so as to realize the powerful drive of the second wheel 12 and realize the change of the power direction from the second motor gear 221 to the differential gear 54.

[0060] When specifically arranged, the third transmission gear 321 and the fourth transmission gear 322 are arranged at intervals in the lateral direction of the vehicle, and the third transmission gear 321 and the fourth transmission gear 322 are arranged in the longitudinal direction of the vehicle between the second motor gear 221 and the differential gear 54, so as to reasonably utilize the space in the longitudinal direction of the vehicle and avoid the lateral installation space of the vehicle from being too compact.

[0061] In some embodiments, the axis of the first wheel shaft 31 coincides with the axis of the second wheel shaft 32, that is, the first wheel shaft 31 and the second wheel shaft 32 are arranged opposite to each other in the lateral direction of the vehicle. In other words, one of the first wheel shaft 31 and the second wheel shaft 32 can be set as the left front wheel shaft and the other can be set as the right front wheel shaft, or one of the first wheel shaft 31 and the second wheel shaft 32 can be set as the left rear wheel shaft and the other can be set as the right rear wheel shaft, that is, for driving the two front wheels or for driving the two rear wheels.

[0062] Moreover, the first motor 21 and the second motor 22 are respectively located on the front and rear sides of the second wheel axle 32. Among them, the second wheel axle 32 extends along the transverse direction of the vehicle. Thus, the first motor 21 can be located on the front side of the second wheel axle 32, and the second motor 22 can be located on the rear side of the second wheel axle 32, or the first motor 21 can be located on the rear side of the second wheel axle 32, and the second motor 22 can be located on the front side of the second wheel axle 32. Specifically, as Figure 1 shown, the first wheel axle 31 is the right front wheel axle, the second wheel axle 32 is the left front wheel axle, and the first motor 21 is located in front of the second wheel axle 32, and the second motor 22 is located behind the second wheel axle 32. Thus, the first motor 21 and the second motor 22 can respectively utilize the space in the front and rear directions of the second wheel axle 32, so that the arrangements of the first motor 21 and the second motor 22 are relatively dispersed and will not be installed too compactly.

[0063] In some embodiments, the third wheel 13 is connected to a third wheel axle 33. The third wheel axle 33 is provided with a third output gear 331, and the third motor 23 is provided with a third motor gear 231. The third motor gear 231 and the third output gear 331 are power-connected through a gear set. Among them, the third motor gear 231 is fixedly sleeved on the motor shaft of the third motor 23, so that the driving force output by the third motor 23 can be output to the third wheel axle 33 through the third motor gear 231, the gear set and the third output gear 331 in sequence, realizing the power output to the third wheel 13.

[0064] Among them, the gear set between the third motor gear 231 and the third output gear 331 may include a fifth transmission gear 332 and a sixth transmission gear 333. The fifth transmission gear 332 and the sixth transmission gear 333 are coaxially arranged, and the third motor gear 231 meshes with the fifth transmission gear 332, and the third output gear 331 meshes with the sixth transmission gear 333. By setting the power transmission of the fifth transmission gear 332 and the sixth transmission gear 333, the speed ratio change from the third motor gear 231 to the third output gear 331 can be realized, the adjustment of the power output of the third motor 23 can be realized, and the gear rotation direction from the third motor gear 231 to the third output gear 331 can be changed.

[0065] In addition, the fourth wheel 14 is connected to a fourth wheel axle 34. The fourth wheel axle 34 is provided with a fourth output gear 341, and the fourth motor 24 is provided with a fourth motor gear 241. The fourth motor gear 241 and the fourth output gear 341 are power-connected through a gear set. Among them, the fourth motor gear 241 is fixedly sleeved on the motor shaft of the fourth motor 24, so that the driving force output by the fourth motor 24 can be output to the fourth wheel axle 34 through the fourth motor gear 241, the gear set and the fourth output gear 341 in sequence, realizing the power output to the fourth wheel 14.

[0066] Among them, the gear set between the fourth motor gear 241 and the fourth output gear 341 may include a seventh transmission gear 342 and an eighth transmission gear 343. The seventh transmission gear 342 and the eighth transmission gear 343 are coaxially arranged, and the fourth motor gear 241 meshes with the seventh transmission gear 342, and the fourth output gear 341 meshes with the eighth transmission gear 343. By setting the power transmission of the seventh transmission gear 342 and the eighth transmission gear 343, the speed ratio change from the fourth motor gear 241 to the fourth output gear 341 can be realized, the adjustment of the power output of the fourth motor 24 can be achieved, and the gear rotation direction from the fourth motor gear 241 to the fourth output gear 341 can be changed.

[0067] And in a further embodiment, both the first wheel 11 and the second wheel 12 are set as front wheels, and both the third wheel 13 and the fourth wheel 14 are set as rear wheels. The first motor 21 and the second motor 22 can be used to drive the two front wheels to rotate, and the third motor 23 and the fourth motor 24 can be used to drive the two rear wheels to rotate.

[0068] Specifically, as Figure 1 shown, the first wheel 11 is a right front wheel, the second wheel 12 is a left front wheel, the third wheel 13 is a right rear wheel, and the fourth wheel 14 is a left rear wheel. Correspondingly, the first wheel axle 31 is a right front wheel axle, the second wheel axle 32 is a left front wheel axle, the third wheel axle 33 is a right rear wheel axle, and the fourth wheel axle 34 is a left rear wheel axle.

[0069] Thus, the first motor 21 can be used to drive the right front wheel to rotate, and can also be used to cooperate with the range extender 25 to generate power. At the same time, the second motor 22 can be used to drive the left front wheel to rotate, and can also drive the left front wheel and the right front wheel to rotate simultaneously. The third motor 23 is used to drive the right rear wheel to rotate, and the fourth motor 24 is used to drive the left rear wheel to rotate. Thus, the four motors can drive the four wheels to rotate respectively, with a simple structure, which is beneficial to improving the vehicle's ability to get out of trouble.

[0070] In some embodiments, both the range extender 25 and the first motor 21 are located in front of the front wheel axle, and the second motor 22 is located between the front wheel axle and the rear wheel axle. That is, in this embodiment, both the first wheel axle 31 and the second wheel axle 32 are front wheel axles, the first wheel axle 31 is a right front wheel axle, and the second wheel axle 32 is a left front wheel axle. At the same time, both the third wheel axle 33 and the fourth wheel axle 34 are rear wheel axles, the third wheel axle 33 is a right rear wheel axle, and the fourth wheel axle 34 is a left rear wheel axle.

[0071] Thus, both the range extender 25 and the first motor 21 are located in the front region of the vehicle, which is conducive to shortening the power transmission path between the first motor 21 and the first wheel axle 31. At the same time, the power transmission components between the range extender 25 and the first motor 21 can be reduced, realizing an effective power generation and driving arrangement. At the same time, the second motor 22 is located in the middle region of the vehicle, enabling the second motor 22 to maintain a short power path with the second wheel axle 32. Moreover, the second motor 22 does not need to be compactly installed with both the range extender 25 and the first motor 21 in the front region of the vehicle, making good use of the middle space of the vehicle and avoiding congestion in the front region of the vehicle.

[0072] In addition, both the third motor 23 and the fourth motor 24 are located between the front wheel axle and the rear wheel axle. In other words, both the third motor 23 and the fourth motor 24 are located in the middle region of the vehicle. In this way, not only is it conducive to reducing the distance between the third motor 23 and the third wheel axle 33, but also the distance between the fourth motor 24 and the fourth wheel axle 34 is reduced, and the middle space of the vehicle can be better utilized. It can be understood that in the longitudinal direction of the vehicle, the longitudinal length of the middle space is greater than the space in the front region and greater than the space in the rear region. As a result, the main components of the power transmission system 100 can make greater use of the middle space of the vehicle, making the compactness of each part of the vehicle relatively balanced and realizing a reasonable arrangement of the positions of each component.

[0073] In addition, it should be noted that a differential lock can be provided between the third wheel axle 33 and the fourth wheel axle 34 to lock the third wheel axle 33 and the fourth wheel axle 34, or a differential lock can be provided between the first wheel axle 31 and the second wheel axle 32 to lock the first wheel axle 31 and the second wheel axle 32. The setting of the differential lock can make the vehicle have better power performance when climbing slopes. In specific design, the differential lock can be selectively provided between the two front wheel axles or the two rear wheel axles according to the overall vehicle requirements.

[0074] The present invention also proposes a vehicle.

[0075] The vehicle according to the embodiment of the present invention is provided with the power transmission system 100 of any of the above embodiments. In some specific embodiments, as Figure 1 shown, the vehicle is provided with a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel. Among them, the first motor 21 and the range extender 25 can be selectively power-connected, and the first motor 21 can be selectively power-connected to the right front wheel. At the same time, the second motor 22 can be selectively power-connected to the left front wheel, so that the first motor 21 and the second motor 22 can be jointly used to drive the two front wheels to rotate. In addition, the second motor 22 can also drive the left front wheel and the right front wheel to rotate simultaneously through the differential 5, so that when the first motor 21 is used to cooperate with the range extender 25 for power generation, the second motor 22 can drive the two front wheels to rotate simultaneously.

[0076] AsFigure 1 As shown, the third motor 23 is power-connected to the right rear wheel through a gear set, and the fourth motor 24 is power-connected to the left rear wheel through a gear set, so as to drive the two rear wheels to rotate simultaneously through the third motor 23 and the fourth motor 24. Thus, independent drive of the four wheels can be achieved.

[0077] Thus, by setting the power transmission system 100, independent drive of each wheel can be achieved, which is beneficial to improving the vehicle's ability to get out of trouble. Moreover, the setting of a separate generator can be reduced, and when the first motor 21 generates electricity, effective drive of each wheel can still be ensured, guaranteeing the power performance of the vehicle during the power generation process.

[0078] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0079] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power transmission system, characterized in that, comprising: a first wheel, a second wheel, a third wheel and a fourth wheel; a first motor and a range extender, the first motor being arranged to be selectively power-connected to the first wheel or the range extender; a second motor, the second motor being power-connected to the second wheel or, when the first motor is power-connected to the range extender, simultaneously power-connected to the first wheel and the second wheel; a third motor and a fourth motor, the third motor being power-connected to the third wheel and the fourth motor being power-connected to the fourth wheel.

2. The power transmission system according to claim 1, characterized in that, it further comprises a differential, the differential having a differential case, the first wheel being connected to a first axle, the second wheel being connected to a second axle, one half axle of the differential being connected to the second axle, and the other half axle of the differential being selectively connected to the first axle; wherein, the first motor is selectively power-connected to the first axle, and the second motor is power-connected to the differential case.

3. The power transmission system according to claim 2, characterized in that, it further comprises a first synchronizer, a second synchronizer and a third synchronizer, the first synchronizer being used to selectively power-connect the first motor to the range extender, the second synchronizer being used to selectively power-connect the first motor to the first axle and to selectively lock the first axle to one half axle of the differential, and the third synchronizer being used to selectively lock the differential case to one half axle of the differential.

4. The power transmission system according to claim 3, characterized in that, the first motor is connected to a first motor gear, the output shaft of the range extender is sleeved with a range gear, the range gear meshes with the first motor gear, and the first synchronizer is used to selectively couple or disconnect the range gear from the output shaft; and / or, the first motor is connected to a first motor gear, the first axle is provided with a first output gear, the first output gear is power-connected to the first motor gear, and the second synchronizer is used to selectively couple or disconnect the first output gear from the first axle.

5. The power transmission system according to claim 4, characterized in that, it further comprises a first transmission gear and a second transmission gear arranged coaxially, the first transmission gear meshing with the first motor gear, and the second transmission gear meshing with the first output gear.

6. The power transmission system according to claim 3, characterized in that, it further comprises a third transmission gear and a fourth transmission gear arranged coaxially, the second motor being connected to a second motor gear, the differential case being provided with a differential gear, the third transmission gear meshing with the second motor gear, and the fourth transmission gear meshing with the differential gear.

7. The power transmission system according to claim 2, characterized in that, the axis of the first axle coincides with the axis of the second axle, and the first motor and the second motor are respectively located on the front and rear sides of the second axle.

8. The power transmission system according to claim 1, wherein, the third wheel is connected to a third axle, the third axle is provided with a third output gear, the third motor is provided with a third motor gear, and the third motor gear is power-connected to the third output gear through a gear set; the fourth wheel is connected to a fourth axle, the fourth axle is provided with a fourth output gear, the fourth motor is provided with a fourth motor gear, and the fourth motor gear is power-connected to the fourth output gear through a gear set.

9. The power transmission system according to any one of claims 1-8, wherein, the first wheel and the second wheel are both set as front wheels, and the third wheel and the fourth wheel are both set as rear wheels; and / or, the range extender and the first motor are both located in front of the front axle, and the second motor is located between the front axle and the rear axle; and / or, the third motor and the fourth motor are both located between the front axle and the rear axle.

10. A vehicle, wherein, it is provided with the power transmission system according to any one of claims 1-9.

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