Vehicle driving system and vehicle

Abstract

The vehicle driving system and the vehicle are used for solving the technical problems that a four-wheel independent driving system is low in working condition efficiency, large in left and right torque consistency control difficulty and high in cost. The vehicle driving system comprises a driving motor, a first speed reducing mechanism and a second speed reducing mechanism which have the same speed reducing ratio and can transmit torque output by the driving motor to a left half shaft and a right half shaft respectively, and a first clutch and a second clutch which are connected between the driving motor and the first speed reducing mechanism and between the driving motor and the second speed reducing mechanism respectively. The first speed reducing mechanism is arranged on the left half shaft and the right half shaft and at least has a complete separation state and a semi-clutch state, at most one of the first clutch and the second clutch is in the semi-clutch state, and the third speed reducing mechanism has a speed reducing ratio different from that of the first speed reducing mechanism and can transmit torque output by the driving motor to the left half shaft and the right half shaft. The differential mechanism is connected to the output end of the third speed reducing mechanism, and the third speed reducing mechanism transmits torque to the left half shaft and the right half shaft through the differential mechanism.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle driving technology, and in particular, to a vehicle driving system and a vehicle. Background Art

[0002] In the related technology, the torque and speed of the four wheels of a four-wheel independent drive vehicle can be accurately controlled independently of each other, which brings a series of advantages, such as achieving smaller radius turning, assisting ESP function, assisting steering function, assisting braking function, etc., thereby improving the vehicle's handling performance. At the same time, the four motors can achieve higher power and stronger escape performance.

[0003] However, compared with the four-wheel drive system driven by two motors, the four-wheel drive system driven by four motors independently has lower operating efficiency; secondly, for the independent drive system, since there is no differential, it brings challenges to the torque consistency control of the left and right wheels of the vehicle, and the cost is also relatively high. Summary of the invention

[0004] The purpose of the present disclosure is to provide a vehicle drive system and a vehicle to solve the technical problems of low working efficiency, difficulty in left and right torque consistency control and high cost of a four-wheel independent drive system.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a vehicle drive system, comprising: a drive motor, a first reduction mechanism, capable of transmitting the torque output by the drive motor to the left half shaft, a first clutch, connected between the drive motor and the first reduction mechanism, and having at least a fully separated state and a semi-clutched state, so as to adjust the torque transmitted by the drive motor to the left half shaft through the first reduction mechanism, a second reduction mechanism, having the same reduction ratio as the first reduction mechanism, the second reduction mechanism being capable of transmitting the torque output by the drive motor to the right half shaft, a second clutch, connected between the drive motor and the second reduction mechanism, and having at least a fully separated state and a semi-clutched state, so as to adjust the torque transmitted by the drive motor to the right half shaft through the second reduction mechanism, at most one of the first clutch and the second clutch being in the semi-clutched state, a third reduction mechanism, having a different reduction ratio from the first reduction mechanism, capable of transmitting the torque output by the drive motor to the left half shaft and the right half shaft, and a differential, connected to the output end of the third reduction mechanism, the third reduction mechanism transmitting torque to the left half shaft and the right half shaft through the differential.

[0006] Optionally, the first reduction mechanism includes: a first input gear connected to the first clutch so that the drive motor inputs torque through the first input gear, and a first output gear meshing with the first input gear, the first output gear being coaxial with the left half shaft and fixedly connected to output torque to the left half shaft.

[0007] Optionally, the second reduction mechanism includes: a second input gear connected to the second clutch so that the drive motor inputs torque through the second input gear, and a second output gear meshing with the second input gear, the second output gear being coaxial with the right half shaft and fixedly connected to output torque to the right half shaft.

[0008] Optionally, the third reduction mechanism includes: a third input gear connected to the output end of the drive motor so that the drive motor inputs torque through the third input gear, and a third output gear meshing with the third input gear, and the third output gear is fixedly connected to the housing of the differential to output torque to the left half shaft and the right half shaft through the differential.

[0009] Optionally, the vehicle drive system also includes a fourth reduction mechanism connected to the output end of the drive motor, the first clutch is connected between the fourth reduction mechanism and the first reduction mechanism, the second clutch is connected between the fourth reduction mechanism and the second reduction mechanism, and the third reduction mechanism is connected between the fourth reduction mechanism and the differential.

[0010] Optionally, the fourth reduction mechanism includes: a fourth input gear, which is coaxial and fixedly connected to the output shaft of the drive motor, and a fourth output gear, which is meshed with the fourth input gear, and the fourth output gear is coaxial and fixedly connected to the input shaft of the third reduction mechanism, the first clutch is connected between the fourth output gear and the input end of the first reduction mechanism, and the second clutch is connected between the fourth output gear and the input end of the second reduction mechanism.

[0011] Optionally, the first clutch also has a fully engaged state, and the second clutch also has a fully engaged state.

[0012] On the basis of the above technical solution, the present disclosure also provides a vehicle, comprising the vehicle drive system in the above technical solution.

[0013] Optionally, the vehicle includes two sets of the vehicle drive systems, and the two sets of the vehicle drive systems are respectively used to drive the two front wheels and the two rear wheels of the vehicle.

[0014] Through the above technical solution, in the vehicle drive system provided by the present disclosure, when the first clutch and the second clutch are both in a completely disengaged state, the drive motor distributes equal torque to the left half-shaft and the right half-shaft through the third reduction mechanism and the differential, thereby realizing a working mode in which a single drive motor drives the left and right wheels in a centralized manner. At this time, if the vehicle is traveling straight, the rotation speeds of the left and right wheels are consistent, and the differential function of the differential is not activated. If the vehicle turns, the rotation speeds of the left and right wheels are different, and the rotation speed difference between the left and right wheels causes the differential function of the differential to be activated, thereby ensuring reliable steering. When one of the first clutch and the second clutch is in a semi-disengaged state, the third reduction mechanism and the differential are used to reduce the speed of the left and right wheels, thereby reducing the speed of the left and right wheels, thereby reducing the speed of the right and left ... left and right wheels, thereby reducing the speed of the right and right wheels, thereby reducing the speed of the left and right wheels, thereby reducing the speed of the right and right wheels, thereby reducing the speed of the left and right wheels, thereby reducing the speed of the right and right wheels, thereby reducing the speed of the left and right wheels, thereby reducing the speed of the right and right wheels, thereby reducing the speed of the left When one of the first and second clutches is in a clutch state and the other is in a completely separated state, the drive motor drives the corresponding reduction mechanism and the half shaft to rotate through the clutch in the semi-clutch state. Since the reduction ratio of the third reduction mechanism is different from the reduction ratio of the first and second reduction mechanisms, there is a torque difference and a speed difference between the left and right half shafts. By controlling the degree of semi-clutching of the clutch, the torque difference distributed by the drive motor to the left and right half shafts can be controlled, thereby realizing a working mode in which a single drive motor independently drives the left and right wheels, that is, realizing an active adjustment function for the speed and torque of the left and right half shafts, and improving the vehicle's turning performance and body stability control ability. The vehicle drive system provided by the present disclosure can realize a working mode in which a single drive motor drives the left and right wheels in a centralized manner, improve working efficiency, and reduce costs, and can also realize a working mode in which a single drive motor independently drives the left and right wheels, and realize an active differential function, and the power is not interrupted during the switching process between the two working modes, thereby realizing a senseless switching and improving the driving experience. In addition, since the first clutch and the second clutch only need to transmit the torque and power required for the differential, the first clutch and the second clutch are relatively small in size, which can further reduce the cost. The vehicle provided by the present disclosure has the same technical effect as the vehicle drive system in the above technical solution, and in order to avoid unnecessary repetition, it will not be described here.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of a vehicle drive system in a specific implementation manner of the present disclosure.

[0018] Figure 2 It is a structural schematic diagram of a vehicle drive system in another specific implementation manner of the present disclosure.

[0019] Description of Reference Numerals

[0020] 100-drive motor, 10-left half shaft, 101-left wheel, 20-right half shaft, 201-right wheel,

[0021] 1- first speed reduction mechanism, 11- first input gear, 12- first output gear,

[0022] 2-second speed reduction mechanism, 21-second input gear, 22-second output gear,

[0023] 3- third speed reduction mechanism, 31- third input gear, 32- third output gear,

[0024] 4- First clutch,

[0025] 5- Second clutch,

[0026] 6- Differential,

[0027] 7-fourth reduction gear mechanism, 71-fourth input gear, 72-fourth output gear. DETAILED DESCRIPTION

[0028] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0029] In the present disclosure, unless otherwise stated, directional words such as "inside" and "outside" generally refer to the inside and outside relative to the contour of the corresponding component itself. The terms "first" and "second" used in the present disclosure are to distinguish one element from another element and do not have order and importance. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] According to a specific embodiment of the present disclosure, a vehicle drive system is provided, including: a drive motor 100, a first reduction mechanism 1, capable of transmitting the torque output by the drive motor 100 to the left half shaft 10, a first clutch 4, connected between the drive motor 100 and the first reduction mechanism 1, and having at least a fully separated state and a semi-clutch state to adjust the torque transmitted by the drive motor 100 to the left half shaft 10 through the first reduction mechanism 1, a second reduction mechanism 2, having the same reduction ratio as the first reduction mechanism 1, the second reduction mechanism 2 being capable of transmitting the torque output by the drive motor 100 to the right half shaft 20, and a second clutch 5, connected between the drive motor 100 and the second reduction mechanism 2, and having at least a completely separated state and a semi-clutch state to adjust the torque transmitted by the drive motor 100 to the right half-shaft 20 through the second reduction mechanism 2, at most one of the first clutch 4 and the second clutch 5 is in the semi-clutch state, the third reduction mechanism 3, having a different reduction ratio from the first reduction mechanism 1, and capable of transmitting the torque output by the drive motor 100 to the left half-shaft 10 and the right half-shaft 20, and the differential 6, connected to the output end of the third reduction mechanism 3, the third reduction mechanism 3 transmits torque to the left half-shaft 10 and the right half-shaft 20 through the differential 6.

[0031] Through the above technical solution, in the vehicle drive system provided by the present disclosure, when the first clutch 4 and the second clutch 5 are both in a completely disengaged state, the drive motor 100 distributes equal torque to the left half-shaft 10 and the right half-shaft 20 through the third reduction mechanism 3 and the differential 6, thereby realizing a working mode in which a single drive motor 100 drives the left and right wheels in a centralized manner. At this time, if the vehicle is moving straight, the rotation speeds of the left wheel 101 and the right wheel 201 are consistent, and the differential function of the differential 6 is not activated. If the vehicle turns, the rotation speeds of the left wheel 101 and the right wheel 201 are different, and the rotation speed difference between the left wheel 101 and the right wheel 201 causes the differential function of the differential 6 to be activated, thereby ensuring reliable steering. When the first clutch 4 and the second clutch 5 When one of them is in a semi-clutch state and the other is in a completely separated state, the drive motor 100 drives the corresponding reduction mechanism and half-shaft to rotate through the clutch in the semi-clutch state. Since the reduction ratio of the third reduction mechanism 3 is different from the reduction ratios of the first reduction mechanism 1 and the second reduction mechanism 2, there is a torque difference and a speed difference between the left half-shaft 10 and the right half-shaft 20. By controlling the degree of semi-clutching of the clutch, the torque difference allocated by the drive motor 100 to the left half-shaft 10 and the right half-shaft 20 can be controlled, thereby realizing a working mode in which a single drive motor 100 independently drives the left and right wheels, that is, realizing the active adjustment function of the speed and torque of the left half-shaft 10 and the right half-shaft 20, thereby improving the vehicle's turning performance and body stability control ability. The vehicle drive system provided by the present disclosure can realize a working mode in which a single drive motor 100 drives the left and right wheels in a centralized manner, improves working efficiency, and reduces costs by adjusting the engagement state of the first clutch 4 and the second clutch 5, and can also realize a working mode in which a single drive motor 100 drives the left and right wheels independently, and realizes an active differential function, and the power is not interrupted during the switching process between the two working modes, thereby realizing a senseless switching and improving the driving experience. In addition, since the first clutch 4 and the second clutch 5 only need to transmit the torque and power required for the differential, the first clutch 4 and the second clutch 5 are relatively small in size, which can further reduce costs.

[0032] Figure 1 A specific implementation manner in which the reduction ratio of the third reduction mechanism 3 is smaller than that of the first reduction mechanism 1 and the second reduction mechanism 2 is shown. Taking the case where the first reduction mechanism 1 is in a semi-clutch state and the second reduction mechanism 2 is in a completely separated state as an example, the drive motor 100 drives the left half-shaft 10 to rotate through the first reduction mechanism 1, and the drive motor 100 drives the right half-shaft 20 to rotate through the third reduction mechanism 3. Since the reduction ratio of the third reduction mechanism 3 is smaller, the torque and speed allocated to the left half-shaft 10 are smaller than the torque and speed allocated to the right half-shaft 20.

[0033] Figure 2A specific implementation manner in which the reduction ratio of the third reduction mechanism 3 is greater than the reduction ratio of the first reduction mechanism 1 and the second reduction mechanism 2 is shown. Taking the case where the first reduction mechanism 1 is in a semi-clutch state and the second reduction mechanism 2 is in a completely separated state as an example, the drive motor 100 drives the left half-shaft 10 to rotate through the first reduction mechanism 1, and the drive motor 100 drives the right half-shaft 20 to rotate through the third reduction mechanism 3. Since the reduction ratio of the third reduction mechanism 3 is relatively large, the torque and speed allocated to the left half-shaft 10 are greater than the torque and speed allocated to the right half-shaft 20.

[0034] refer to Figure 1 and Figure 2 As shown, the first reduction mechanism 1 can be a first-stage reduction mechanism, and the first reduction mechanism 1 can include a first input gear 11 and a first output gear 12 that are meshed with each other, wherein the first input gear 11 can be connected to the first clutch 4 so that the drive motor 100 inputs torque through the first input gear 11, and the first output gear 12 can be coaxially and fixedly connected to the left half shaft 10 to output torque to the left half shaft 10.

[0035] refer to Figure 1 and Figure 2 As shown, the second reduction mechanism 2 can be a first-stage reduction mechanism, and the second reduction mechanism 2 includes a second input gear 21 and a second output gear 22 that are meshed with each other, wherein the second input gear 21 can be connected to the second clutch 5 so that the drive motor 100 inputs torque through the second input gear 21, and the second output gear 22 can be coaxially and fixedly connected to the right half shaft 20 to output torque to the right half shaft 20.

[0036] refer to Figure 1 and Figure 2 As shown, the third reduction mechanism 3 can be a first-stage reduction mechanism, and the third reduction mechanism 3 includes a third input gear 31 and a third output gear 32 that are meshed with each other, wherein the third input gear 31 can be connected to the output end of the drive motor 100 so that the drive motor 100 inputs torque through the third input gear 31, and the third output gear 32 can be fixedly connected to the housing of the differential 6 to output torque to the left half shaft 10 and the right half shaft 20 through the differential 6.

[0037] In addition, reference Figure 1 and Figure 2 As shown, the vehicle drive system may further include a fourth reduction mechanism 7 connected to the output end of the drive motor 100, the first clutch 4 may be connected between the fourth reduction mechanism 7 and the first reduction mechanism 1, the second clutch 5 may be connected between the fourth reduction mechanism 7 and the second reduction mechanism 2, and the third reduction mechanism 3 may be connected between the fourth reduction mechanism 7 and the differential 6.

[0038] refer to Figure 1 and Figure 2 As shown, the fourth reduction mechanism 7 can be a first-stage reduction mechanism, and the fourth reduction mechanism 7 can include a fourth input gear 71 and a fourth output gear 72 that are meshed with each other, wherein the fourth input gear 71 can be coaxially and fixedly connected to the output shaft of the drive motor 100 to receive the torque from the drive motor 100, and the fourth output gear 72 can be coaxially and fixedly connected to the input shaft of the third reduction mechanism 3, specifically, the fourth output gear 72 can be coaxially and fixedly connected to the third input gear 31 to directly drive the third input gear 31 to rotate, the first clutch 4 can be connected between the fourth output gear 72 and the input end of the first reduction mechanism 1, specifically, the first clutch 4 can be connected between the fourth output gear 72 and the first input gear 11 to adjust the torque output by the fourth output gear 72 to the first reduction mechanism 1, and the second clutch 5 can be connected between the fourth output gear 72 and the input end of the second reduction mechanism 2, specifically, the second clutch 5 can be connected between the fourth output gear 72 and the second input gear 21 to adjust the torque output by the fourth output gear 72 to the second reduction mechanism 2.

[0039] In addition, the first clutch 4 may also have a fully engaged state, and the second clutch 5 may also have a fully engaged state.

[0040] For example, if the wheels on one side slip, one of the first clutch 4 and the second clutch 5 is in a semi-clutch state or a fully disengaged state, and the other of the first clutch 4 and the second clutch 5 is in a fully engaged state, then the torque output by the drive motor 100 can be fully transmitted to the wheels on the other side, thereby improving the vehicle's ability to escape from trouble.

[0041] On the basis of the above technical solution, the present disclosure also provides a vehicle, comprising the vehicle drive system in the above technical solution.

[0042] Through the above technical solution, the vehicle provided by the present invention has the same technical effect as the vehicle drive system in the above technical solution. In order to avoid unnecessary repetition, it will not be described here.

[0043] In a specific embodiment of the present disclosure, the vehicle may include two vehicle drive systems, which can be used to drive the two front wheels and the two rear wheels of the vehicle respectively, so that both centralized driving of the four wheels and independent driving of the four wheels can be achieved through two drive motors 100.

[0044] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0046] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle drive system, characterized in that: include: Drive motor, The first reduction mechanism is capable of transmitting the torque output by the driving motor to the left half shaft, a first clutch connected between the drive motor and the first reduction mechanism and having at least a fully disengaged state and a semi-clutched state to adjust the torque transmitted from the drive motor to the left half shaft through the first reduction mechanism; a second reduction mechanism having the same reduction ratio as the first reduction mechanism, and capable of transmitting the torque output by the drive motor to the right half shaft; a second clutch connected between the drive motor and the second reduction mechanism and having at least a fully disengaged state and a semi-clutched state to adjust the torque transmitted from the drive motor to the right half shaft through the second reduction mechanism, wherein at most one of the first clutch and the second clutch is in the semi-clutched state; a third reduction mechanism having a reduction ratio different from that of the first reduction mechanism, capable of transmitting the torque output by the drive motor to the left half shaft and the right half shaft, and A differential is connected to an output end of the third reduction mechanism, and the third reduction mechanism transmits torque to the left half shaft and the right half shaft through the differential.

2. The vehicle drive system according to claim 1, characterized in that: The first reduction mechanism comprises: a first input gear connected to the first clutch so that the drive motor inputs torque through the first input gear, and The first output gear is meshed with the first input gear, and the first output gear is coaxial with and fixedly connected to the left half shaft to output torque to the left half shaft.

3. The vehicle drive system according to claim 1, characterized in that: The second reduction mechanism comprises: a second input gear connected to the second clutch so that the drive motor inputs torque through the second input gear, and The second output gear is meshed with the second input gear, and the second output gear is coaxial with and fixedly connected to the right half shaft to output torque to the right half shaft.

4. The vehicle drive system according to claim 1, characterized in that: The third reduction mechanism comprises: a third input gear connected to the output end of the drive motor so that the drive motor inputs torque through the third input gear, and The third output gear is meshed with the third input gear, and the third output gear is fixedly connected to the housing of the differential to output torque to the left half shaft and the right half shaft through the differential.

5. The vehicle drive system according to claim 1, characterized in that: The vehicle drive system further includes a fourth reduction mechanism connected to the output end of the drive motor, The first clutch is connected between the fourth reduction mechanism and the first reduction mechanism. The second clutch is connected between the fourth reduction mechanism and the second reduction mechanism. The third reduction mechanism is connected between the fourth reduction mechanism and the differential.

6. The vehicle drive system according to claim 5, characterized in that: The fourth reduction mechanism comprises: a fourth input gear coaxially and fixedly connected to the output shaft of the drive motor, and A fourth output gear is meshed with the fourth input gear, the fourth output gear is coaxial with and fixedly connected to the input shaft of the third reduction mechanism, the first clutch is connected between the fourth output gear and the input end of the first reduction mechanism, and the second clutch is connected between the fourth output gear and the input end of the second reduction mechanism.

7. The vehicle drive system according to claim 1, characterized in that: The first clutch also has a fully engaged state and the second clutch also has a fully engaged state.

8. A vehicle, characterized in that: A vehicle drive system comprising the vehicle drive system according to any one of claims 1 to 7.

9. The vehicle according to claim 8, characterized in that The vehicle comprises two sets of the vehicle driving systems, and the two sets of the vehicle driving systems are respectively used to drive the two front wheels and the two rear wheels of the vehicle.

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