Driving device and vehicle

Abstract

The application provides a driving device and a vehicle, and relates to the technical field of vehicle driving devices. The driving device comprises an input shaft, a first clutch, a second clutch, a separator, a first half shaft, a second half shaft, a housing, a first planetary gear set and a second planetary gear set. The first half shaft and the second half shaft are connected with left and right wheels respectively. When the vehicle turns left at medium-high speed, the first clutch can be switched to a sliding friction state, the left wheel is decelerated, the driving torque output to the left wheel is reduced, and the left wheel can be prevented from slipping. When the vehicle turns right at medium-high speed, the second clutch can be switched to a sliding friction state, the right wheel is decelerated, the driving torque output to the right wheel is reduced, and the right wheel can be prevented from slipping. Therefore, the driving device in the embodiment of the application can reasonably distribute the driving torque output to the first half shaft and the second half shaft, the wheel can be prevented from slipping when the vehicle turns at medium-high speed, and the vehicle body can be prevented from losing stability.

Description

Technical Field

[0001] This application relates to the field of vehicle drive system technology, and particularly to a drive system and a vehicle using the drive system. Background Technology

[0002] Currently, the drive axle of a car is the core component connecting the power source and the drive wheels. Located at the end of the transmission system, the drive axle transmits power to the drive wheels to drive the vehicle.

[0003] In related technologies, the drive axle can transmit driving torque to the left and right wheels to drive the vehicle normally, and the differential of the electric drive axle has the characteristic of "differential speed but no torque difference", always distributing the driving torque evenly to the left and right wheels.

[0004] However, when a vehicle is turning at medium to high speeds, centrifugal force causes the vehicle's center of gravity to shift outwards, increasing the vertical load on the outer wheels and decreasing the vertical load on the inner wheels. If the driving torque of the inner wheels exceeds the adhesion limit allowed by its vertical load, the inner wheels will slip, causing the vehicle to become unstable and reducing the driving experience. Utility Model Content

[0005] This application provides a drive device and a vehicle to solve the technical problem that the wheels are prone to slippage when the vehicle is turning at high speed, which leads to vehicle instability.

[0006] In a first aspect, this application provides a drive device, comprising an input shaft, a first clutch, a second clutch, a separator, a first half-shaft, a second half-shaft, a housing, a first planetary gear set, and a second planetary gear set. The first and second planetary gear sets are mounted within the housing. The first planetary gear set is a single-planetary gear set, comprising a first ring gear, a first planet carrier, and a first sun gear. The first ring gear is driveably connected to the input shaft, and the first planet carrier is driveably connected to the first half-shaft and to the first ring gear via the first clutch. The second planetary gear set is a double-planetary gear set, with the first sun gear connected to the second planet gear via the first clutch. The second planetary gear set is connected to the second half-shaft via a transmission. The second planetary gear set is connected to the first ring gear via a second clutch. The second planetary gear set is connected to or disconnected from the housing via a separator. The second planetary gear set is used to drive the second half-shaft to rotate in the same direction as the first half-shaft. The first clutch and the second clutch both have an engaged state, a slipping state, and a disengaged state. When the first clutch switches from the engaged or disengaged state to the slipping state, the driving torque transmitted from the input shaft to the first half-shaft decreases. When the second clutch switches from the engaged or disengaged state to the slipping state, the driving torque transmitted from the input shaft to the second half-shaft decreases.

[0007] Thus, when the vehicle turns left at medium to high speed, the first clutch can be switched from the disengaged or engaged state to the slipping state. At this time, the first clutch reduces the transmission efficiency between the first planetary carrier and the first ring gear, thereby reducing the driving torque transmitted to the first half-shaft and reducing the speed of the first half-shaft. This prevents the driving torque of the left wheel from exceeding the adhesion limit allowed by its vertical load, prevents the left wheel from slipping, and keeps the vehicle stable when turning left at medium to high speed.

[0008] When the vehicle turns right at medium to high speed, the second clutch can be switched from the disengaged or engaged state to the slipping state. At this time, the transmission efficiency between the output element and the first ring gear is reduced by the second clutch, which will cause the power transmitted from the first planetary gear set to the second planetary gear set to be blocked, thereby reducing the driving torque transmitted to the second half-shaft and reducing the speed of the second half-shaft. This can prevent the driving torque of the right wheel from exceeding the adhesion limit allowed by its vertical load, prevent the right wheel from slipping, and keep the vehicle stable when turning right at medium to high speed.

[0009] Therefore, the drive unit can reasonably distribute the drive torque to both half-shafts according to the actual scenario, so that the vehicle can prevent wheel slippage when turning at medium and high speeds, thereby maintaining vehicle stability and realizing torque vector control function, increasing the flexibility of power output.

[0010] In addition, when a vehicle is driving on a rainy or snowy road, if the traction of the wheels on both sides is different, the drive unit can also prevent the vehicle from becoming unstable by reasonably distributing the drive torque to the half-shafts on both sides. The principle is the same as described above, so it will not be repeated here.

[0011] As an optional implementation, the drive unit has a first gear and a second gear; when the first clutch and the second clutch are disengaged and the second planetary gear set is connected to the housing through the separator, the drive unit is in the first gear; when both the first clutch and the second clutch are engaged and the second planetary gear set is disconnected from the housing through the separator, the drive unit is in the second gear.

[0012] Thus, when the drive unit is in the first gear, the drive torque and speed of the left wheel can be reduced by switching the first clutch from the disengaged state to the slipping state, thereby preventing the left wheel from slipping. Similarly, the drive torque and speed of the right wheel can be reduced by switching the second clutch from the disengaged state to the slipping state, thereby preventing the right wheel from slipping.

[0013] Furthermore, when the drive unit is in the second gear, the drive torque and speed of the left wheel can be reduced by switching the first clutch from the engaged state to the slipping state to prevent the left wheel from slipping. Similarly, the drive torque and speed of the right wheel can be reduced by switching the second clutch from the engaged state to the slipping state to prevent the right wheel from slipping. Of course, when switching the engagement state of the first clutch and the second clutch, the fixing element needs to be disconnected from the housing through the separator to ensure that the vehicle can drive normally.

[0014] As an optional implementation, the second planetary gear set includes a second ring gear, a second planetary carrier, and a second sun gear. The second sun gear is driven to the first sun gear, the second planetary carrier is driven to the second half-shaft, and the second planetary carrier is driven to the first ring gear via a second clutch. The second ring gear is connected to or disconnected from the housing via a separator.

[0015] Thus, when both the first and second clutches are disengaged, and the second ring gear is connected to the housing via the separator, according to the characteristics of a single planetary gear set, the first ring gear receives power and transmits it to the first sun gear and the first planetary carrier through the planetary gears. The power output direction of the first planetary carrier is the same as the input direction of the first ring gear, while the power output direction of the first sun gear is opposite to the input direction of the first ring gear. That is, the first planetary carrier drives the first half-shaft to rotate in the forward direction, and the first sun gear drives the second sun gear to rotate in the reverse direction. Furthermore, according to the characteristics of a double planetary gear set, when the second ring gear is fixed, the second sun gear receives power and outputs it through the second planetary carrier, the power output direction of the second planetary carrier is opposite to the input direction of the second sun gear. Therefore, the second planetary carrier can drive the second half-shaft to rotate in the forward direction, ensuring that both the first and second half-shafts can rotate in the forward direction, thus guaranteeing normal vehicle operation.

[0016] Furthermore, when both the first clutch and the second clutch are engaged, and the second ring gear is disconnected from the housing via the separator, the first planetary carrier is connected to the first ring gear via the first clutch, making the first planetary carrier and the first ring gear a single unit. The second planetary carrier is connected to the first ring gear via the second clutch. Since the second sun gear is connected to the first sun gear, the first planetary gear set and the second planetary gear set can form a single unit. Thus, the first planetary gear set can drive the first half-shaft to rotate in the forward direction, and the second planetary gear set can drive the second half-shaft to rotate in the forward direction, thereby enabling the vehicle to drive normally.

[0017] As an optional implementation, the first clutch is driven to the input shaft, and the second clutch is driven to the input shaft.

[0018] In this way, both the first and second clutches are engaged, allowing the first and second planetary gear sets to form a single unit. The input shaft can be directly connected to the second planetary carrier via the second clutch, enabling the input shaft to directly transmit power to the second planetary gear set, thereby improving torque capacity and transmission efficiency.

[0019] As an optional implementation, the drive device also includes a power source and a transmission structure, wherein the power source is connected to the transmission structure and the transmission structure is connected to the input shaft.

[0020] In this way, the power source can be an engine or an electric motor, the output end of the power source can be connected to the transmission structure, and the input shaft can be rigidly connected to the output end of the transmission structure through splines, gear meshing or couplings to ensure lossless power transmission.

[0021] As an alternative implementation, the axial direction of the output shaft of the power source is perpendicular to the axial direction of the input shaft, and the output shaft of the power source has a first helical gear, the transmission structure has a second helical gear, and the second helical gear meshes with the first helical gear.

[0022] Thus, when the power source is longitudinally positioned within the vehicle body, the output shaft of the power source meshes with the second helical gear of the transmission structure through the first helical gear, enabling the power to be transmitted laterally to the transmission structure. This allows the power source and transmission structure to be arranged along the vehicle's driving direction, thereby reducing the overall width of the drive unit and meeting the space requirements of some vehicle models.

[0023] As an alternative implementation, the axial direction of the output shaft of the power source is parallel to the axial direction of the input shaft, and the output shaft of the power source has a first spur gear, the transmission structure has a second spur gear, and the second spur gear meshes with the first spur gear.

[0024] In this way, when the output shaft of the power source meshes with the second spur gear of the transmission structure through the first spur gear, the power can be transmitted laterally to the transmission structure. The transmission structure can then transmit the power to the laterally positioned input shaft, forming a "straight-line" power flow path. This reduces power loss during angle conversion and improves power transmission efficiency.

[0025] As an optional implementation, the first planetary set and the second planetary set are arranged along their axial direction.

[0026] In this way, the first and second planetary gear sets can improve the overall space utilization of the vehicle.

[0027] As an optional implementation, the drive unit also has a disconnect mode, in which the second clutch is disengaged and the second planetary gear set is disconnected from the housing via a separator.

[0028] Thus, when the drive unit is in disconnect mode, the power output to the second half-shaft can be cut off. Disconnect mode enables controllable power flow cut-off and efficient energy management.

[0029] Secondly, this application also provides a vehicle, including a body and the aforementioned drive unit, the drive unit being mounted on the body.

[0030] The vehicle provided in this application, by adopting the aforementioned drive device, enables the vehicle to have functions such as gear shifting, torque vector control, and differential, thereby significantly improving the vehicle's performance. Attached Figure Description

[0031] Figure 1 A simplified schematic diagram of the power transmission route of the drive device provided in the first embodiment of this application; Figure 2 A simplified schematic diagram of the power transmission route of the drive device provided in the second embodiment of this application.

[0032] Explanation of reference numerals in the attached figures: 10. Drive unit; 1. Input shaft; 2. First clutch; 3. Second clutch; 4. Separator; 5. First half-shaft; 6. Second half-shaft; 7. Housing; 8. First planetary gear set; 81. First ring gear; 82. First planetary carrier; 83. First sun gear; 9. Second planetary gear set; 91. Second ring gear; 92. Second planetary carrier; 93. Second sun gear; 20. Power source; 201. First helical gear; 202. First spur gear; 30. Transmission structure; 301. Second helical gear; 302. Second spur gear. Detailed Implementation

[0033] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0034] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] Currently, the drive axle of a car is the core component connecting the power source and the drive wheels. Located at the end of the transmission system, the drive axle transmits power to the drive wheels to drive the vehicle.

[0036] In related technologies, the drive axle can transmit drive torque to the left and right wheels to drive the vehicle normally. Furthermore, the differential of an electric drive axle has the characteristic of "differential speed, no torque difference," always distributing drive torque evenly to the left and right wheels. However, when the vehicle is turning at medium to high speeds, centrifugal force causes the vehicle's center of gravity to shift outwards, increasing the vertical load on the outer wheels and decreasing the vertical load on the inner wheels. If the drive torque of the inner wheel exceeds its vertical load-allowed adhesion limit, the inner wheel will slip, causing the vehicle to become unstable and reducing the driving experience.

[0037] Based on this, this application provides a drive device 10 and a vehicle, wherein the first half-shaft 5 and the second half-shaft 6 are respectively connected to the left wheel and the right wheel. When the vehicle is turning left at medium to high speed, the first clutch 2 can be switched to a slipping state to decelerate the left wheel and reduce the driving torque output to the left wheel, thereby preventing the left wheel from slipping. Similarly, when the vehicle is turning right at medium to high speed, the second clutch 3 can be switched to a slipping state to decelerate the right wheel and reduce the torque output to the right wheel, thereby preventing the right wheel from slipping. Therefore, the drive device 10 in this application embodiment can reasonably distribute the driving torque output to the first half-shaft 5 and the second half-shaft 6, and can prevent wheel slippage and avoid vehicle instability when the vehicle is turning at medium to high speed.

[0038] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.

[0039] Please see Figure 1 and Figure 2As shown, this embodiment provides a drive device 10, including an input shaft 1, a first clutch 2, a second clutch 3, a separator 4, a first half-shaft 5, a second half-shaft 6, a housing 7, a first planetary gear set 8, and a second planetary gear set 9. The first planetary gear set 8 and the second planetary gear set 9 are installed in the housing 7. The first planetary gear set 8 is a single planetary gear set, including a first ring gear 81, a first planet carrier 82, and a first sun gear 83. The first ring gear 81 is driven by the input shaft 1, and the first planet carrier 82 is driven by the first half-shaft 5 and is also driven by the first ring gear 81 through the first clutch 2. The second planetary gear set 9 is a double planetary gear set, and the first sun gear 81 is driven by the first half-shaft 5. 3 is driven by the second planetary gear set 9 and the second half-shaft 6. The second planetary gear set 9 is driven by the second clutch 3 and the first gear ring 81. The second planetary gear set 9 is connected or disconnected from the housing 7 through the separator 4. The second planetary gear set 9 is used to drive the second half-shaft 6 to rotate in the same direction as the first half-shaft 5. The first clutch 2 and the second clutch 3 both have an engaged state, a slipping state and an disengaged state. When the first clutch 2 switches from the engaged state or the disengaged state to the slipping state, the driving torque transmitted from the input shaft to the first half-shaft 5 decreases. When the second clutch 3 switches from the engaged state or the disengaged state to the slipping state, the driving torque transmitted from the input shaft to the second half-shaft 6 decreases.

[0040] It should be noted that the input shaft 1 is the component of the drive unit 10 that receives external power, the first planetary gear set 8 and the second planetary gear set 9 are the components of the drive unit 10 that distribute power, the first clutch 2, the second clutch 3 and the separator 4 are the components that change the transmission connection relationship between the first planetary gear set 8 and the second planetary gear set 9, the first half-shaft 5 and the second half-shaft 6 are the half-shafts of the drive unit 10 that output power outward, the first half-shaft 5 and the second half-shaft 6 can be connected to the left and right wheels respectively, and the first half-shaft 5 and the second half-shaft 6 can drive the left and right wheels to rotate in the same direction to drive the vehicle forward or backward.

[0041] Thus, the input shaft 1 can transmit external power to the first ring gear 81, causing the first ring gear 81 to drive the first planetary carrier 82 and the first sun gear 83 to rotate. The first planetary carrier 82 can then distribute part of the power from the input shaft 1 to the first half-shaft 5, causing the first half-shaft 5 to drive the left wheel to rotate. The first sun gear 83 can distribute another part of the power from the input shaft 1 to the second planetary gear set 9, causing the second planetary gear set 9 to drive the second half-shaft 6 to rotate. The second half-shaft 6 can then drive the right wheel to rotate. In this embodiment, the first planetary gear set 8 is a single planetary gear set, and the second planetary gear set 9 is a double planetary gear set. The second planetary gear set 9 can drive the second half-shaft 6 and the first half-shaft 5 to rotate in the same direction, facilitating the vehicle's forward or backward movement.

[0042] It should be noted that the second planetary gear set 9 includes an input element, an output element, and a fixed element. The input element is connected to the first sun gear 83, the output element is connected to the second half-shaft 6, and the fixed element is connected to or disconnected from the housing 7 through the separator 4. The input element is the element that receives power from the second planetary gear set 9, and the output element is the element that outputs power from the second planetary gear set 9. The output element is also connected to the first gear ring 81 through the second clutch 3. The first sun gear 83 transmits power to the input element, and the input element transmits power to the second half-shaft 6 through the output element.

[0043] Furthermore, when the clutch is engaged, the clutch friction plates are tightly fitted to the pressure plate, and power is transmitted without slippage through mechanical friction. When the clutch is in a slipping state, the clutch friction plates and the pressure plate slide relative to each other, and power transmission is accompanied by slippage, resulting in reduced transmission efficiency. When the clutch is disengaged, the clutch friction plates and the pressure plate are completely separated, and power transmission is interrupted. Moreover, the slipping state is an intermediate transition stage for the clutch to switch from the engaged state to the disengaged state.

[0044] When the vehicle turns left at medium to high speed, the first clutch 2 can be switched from the disengaged or engaged state to the slipping state. At this time, the transmission efficiency between the first planetary carrier 82 and the first gear ring 81 is reduced, which in turn reduces the driving torque transmitted to the first half-shaft 5 and also reduces the speed of the first half-shaft 5. This prevents the driving torque of the left wheel from exceeding the adhesion limit allowed by its vertical load, prevents the left wheel from slipping, and keeps the vehicle stable when turning left at medium to high speed.

[0045] When the vehicle turns right at medium to high speed, the second clutch 3 can be switched from the disengaged or engaged state to the slipping state. At this time, the second clutch 3 reduces the transmission efficiency between the output element and the first gear ring 81, which will cause the power transmitted from the first planetary gear set 8 to the second planetary gear set 9 to be blocked, thereby reducing the driving torque transmitted to the second half-shaft 6 and reducing the speed of the second half-shaft 6. This can prevent the driving torque of the right wheel from exceeding the adhesion limit allowed by its vertical load, prevent the right wheel from slipping, and keep the vehicle stable when turning right at medium to high speed.

[0046] Therefore, the drive unit 10 can reasonably distribute the drive torque to both half shafts according to the actual scenario, so that the vehicle can prevent wheel slippage when turning at medium and high speeds, thereby maintaining vehicle stability and realizing torque vector control function, increasing the flexibility of power output.

[0047] In addition, when the vehicle is driving on rainy or snowy roads, if the adhesion of the wheels on both sides is different, the drive unit 10 can also prevent the vehicle body from becoming unstable by reasonably distributing the drive torque to the half shafts on both sides. The principle is the same as described above, so it will not be repeated here.

[0048] In some embodiments, the drive unit 10 has a first gear and a second gear. When the first clutch 2 and the second clutch 3 are in the disengaged state and the second planetary gear 9 is connected to the housing 7 through the separator 4, the drive unit 10 is in the first gear. When the first clutch 2 and the second clutch 3 are both in the engaged state and the second planetary gear 9 is disconnected from the housing 7 through the separator 4, the drive unit 10 is in the second gear.

[0049] More specifically, when the first clutch 2 and the second clutch 3 are disengaged, and the fixing element of the second planetary gear 9 is connected to the housing 7 via the separator 4, the first planetary carrier 82 is disconnected from the first ring gear 81, and the output element is also disconnected from the first ring gear 81. After the input shaft 1 transmits power to the first ring gear 81, the first ring gear 81 can distribute power to the first planetary carrier 82 and the first sun gear 83. The first planetary carrier 82 can drive the first half-shaft 5 to rotate, and the first sun gear 83 transmits power to the input element. The input element transmits power to the output element, and the output element can drive the second half-shaft 6 to rotate in the same direction as the first half-shaft 5, thereby driving the vehicle at low speed. At this time, the drive unit 10 is in the first gear.

[0050] When the first clutch 2 and the second clutch 3 are engaged, and the fixing element is disconnected from the housing 7 via the separator 4, the first planetary carrier 82 is connected to the first ring gear 81 via the first clutch 2, making the first planetary carrier 82 and the first ring gear 81 a whole. The output element is connected to the first ring gear 81 via the second clutch 3. Since the input element is connected to the first sun gear 83, the first planetary gear set 8 and the second planetary gear set 9 can form a whole, driving the first half-shaft 5 and the second half-shaft 6 to rotate synchronously, thereby driving the vehicle to drive normally. At this time, the drive unit 10 is in the second gear, so the gear can be switched through the first clutch 2 and the second clutch 3, allowing the drive unit 10 to adapt to more scenarios.

[0051] In addition, when the drive unit 10 is in the first gear, the drive torque and speed of the left wheel can be reduced by switching the first clutch 2 from the disengaged state to the slipping state to prevent the left wheel from slipping. The drive torque and speed of the right wheel can also be reduced by switching the second clutch 3 from the disengaged state to the slipping state to prevent the right wheel from slipping.

[0052] Furthermore, when the drive unit 10 is in the second gear, the drive torque and speed of the left wheel can be reduced by switching the first clutch 2 from the engaged state to the slipping state to prevent the left wheel from slipping. The drive torque and speed of the right wheel can also be reduced by switching the second clutch 3 from the engaged state to the slipping state to prevent the right wheel from slipping.

[0053] When performing drive torque vector control in first and second gear, the states of the separator, first clutch, and second clutch are shown in the table below:

[0054] like Figure 1 As shown, in some embodiments, the second planetary gear 9 includes a second ring gear 91, a second planetary carrier 92, and a second sun gear 93. The second sun gear 93 is driven to the first sun gear 83, the second planetary carrier 92 is driven to the second half-shaft 6, and the second planetary carrier 92 is driven to the first ring gear 81 through the second clutch 3. The second ring gear 91 is connected to or disconnected from the housing 7 through the separator 4.

[0055] Thus, the second sun gear 93 is the input element of the second planetary gear set 9, the second planetary carrier 92 is the output element of the second planetary gear set 9, and the second ring gear 91 is the fixing element of the second planetary gear set 9. Taking the input shaft 1 driving the first ring gear 81 to rotate in the positive direction as an example, when the drive device 10 is in the first gear position, that is, when both the first clutch 2 and the second clutch 3 are in the disengaged state, and the second ring gear 91 is connected to the housing 7 through the separator 4, according to the characteristics of a single planetary gear set, the first ring gear 81 receives power and transmits it to the first sun gear 83 and the first planetary carrier 82 through the planetary gears. The direction of the power output by the first planetary carrier 82 is opposite to that of the first ring gear 81. The input direction of the first ring gear 81 is the same, while the output direction of the first sun gear 83 is opposite to the input direction of the first ring gear 81. That is, the first planetary carrier 82 drives the first half-shaft 5 to rotate in the forward direction, and the first sun gear 83 drives the second sun gear 93 to rotate in the reverse direction. According to the characteristics of the double planetary gear set, when the second ring gear 91 is fixed and the second sun gear 93 receives power and outputs it from the second planetary carrier 92, the output direction of the second planetary carrier 92 is opposite to the input direction of the second sun gear 93. Thus, the second planetary carrier 92 can drive the second half-shaft 6 to rotate in the forward direction, so that both the first half-shaft 5 and the second half-shaft 6 can rotate in the forward direction, ensuring that the vehicle can drive normally.

[0056] Furthermore, when the drive unit 10 is in the second gear, that is, when both the first clutch 2 and the second clutch 3 are engaged, and the second ring gear 91 is disconnected from the housing 7 via the separator 4, the first planetary carrier 82 is connected to the first ring gear 81 via the first clutch 2, making the first planetary carrier 82 and the first ring gear 81 a whole. The second planetary carrier 92 is connected to the first ring gear 81 via the second clutch 3. Since the second sun gear 93 is connected to the first sun gear 83, the first planetary gear set 8 and the second planetary gear set 9 can form a whole. Thus, the first planetary gear set 8 can drive the first half-shaft 5 to rotate in the forward direction, and the second planetary gear set 9 can drive the second half-shaft 6 to rotate in the forward direction, thereby driving the vehicle to drive normally.

[0057] Similarly, when the input shaft 1 drives the first gear ring 81 to rotate in the opposite direction, the drive device 10 is in the first gear or the second gear, which can drive the first half shaft 5 and the second half shaft 6 to rotate in the opposite direction, so that the vehicle can drive normally.

[0058] like Figure 1 As shown, in some embodiments, the first clutch 2 is drive-connected to the input shaft 1, and the second clutch 3 is drive-connected to the input shaft 1.

[0059] Optionally, when the drive unit 10 is in the second gear, both the first clutch 2 and the second clutch 3 are engaged, so that the first planetary gear set 8 and the second planetary gear set 9 can form a whole, and the input shaft 1 can be directly connected to the second planetary carrier 92 through the second clutch 3, so that the input shaft 1 can directly transmit power to the second planetary gear set 9, thereby improving torque carrying capacity and transmission efficiency.

[0060] like Figure 1 As shown, in some embodiments, the drive device 10 further includes a power source 20 and a transmission structure 30, wherein the power source 20 is connected to the transmission structure 30 in a transmission manner, and the transmission structure 30 is connected to the input shaft 1 in a transmission manner.

[0061] Optionally, the power source 20 can be an engine or an electric motor. The output end of the power source 20 can be connected to the transmission structure 30, while the input shaft 1 can be rigidly connected to the output end of the transmission structure 30 through splines, gear meshing, or couplings to ensure lossless power transmission. For example, in an electric drive axle, the motor output shaft is directly coaxially connected to the input shaft 1 to achieve zero-delay power coupling, enabling the power source 20 to efficiently transmit power to the input shaft 1.

[0062] like Figure 1 As shown, in some embodiments, the output shaft of the power source 20 has a first helical gear 201, and the transmission structure 30 has a second helical gear 301, which meshes with the first helical gear 201.

[0063] In this embodiment, the power source 20 is longitudinally arranged inside the vehicle body, that is, the output shaft of the power source 20 (engine / motor) is parallel to the vehicle's driving direction. The output shaft of the power source 20 meshes with the second helical gear 301 of the transmission structure 30 through the first helical gear 201, so as to transmit power laterally to the transmission structure 30. This allows the power source 20 and the transmission structure 30 to be arranged along the vehicle's driving direction, thereby reducing the overall width of the drive device 10 and meeting the space requirements of some vehicle models.

[0064] like Figure 2 As shown, in some embodiments, the axial direction of the output shaft of the power source 20 is parallel to the axial direction of the input shaft 1, and the output shaft of the power source 20 has a first spur gear 202, and the transmission structure 30 has a second spur gear 302, which meshes with the first spur gear 202.

[0065] In this embodiment, the power source 20 is arranged laterally inside the vehicle body, that is, the output shaft of the power source 20 is perpendicular to the vehicle's driving direction. The output shaft of the power source 20 meshes with the second spur gear 302 of the transmission structure 30 through the first spur gear 202, so as to realize the lateral transmission of power to the transmission structure 30. The transmission structure 30 can transmit power to the laterally arranged input shaft 1, forming a "straight-line" power flow path, which can reduce the loss of power in angle conversion and improve the power transmission efficiency.

[0066] like Figure 1 and Figure 2 As shown, in some embodiments, the first planetary row 8 and the second planetary row 9 are arranged along their axial direction.

[0067] Optionally, the axis of the first planetary gear set 8 is aligned with the axis of the second planetary gear set 9 (in the same direction), and the axis of the first planetary gear set 8 is perpendicular to the vehicle's driving direction, so that the rotation axis of the first planetary gear set 8 and the rotation axis of the second planetary gear set 9 are both arranged along the vehicle's transverse (left-right direction) and perpendicular to the vehicle's driving direction (longitudinal).

[0068] In this embodiment, in a transverse front-wheel drive vehicle, the power source 20 is longitudinally arranged inside the vehicle body and transmits power laterally to the transmission structure 30 through the meshing of the first helical gear 201 and the second helical gear 301. The transmission structure 30 then transmits the power to the first planetary gear set 8 and the second planetary gear set 9, which can form an L-shaped power flow path of "longitudinal power source - transverse planetary gear set", reducing the length of the longitudinal drive shaft and improving the overall space utilization of the vehicle.

[0069] In some embodiments, the drive unit 10 also has a disconnect mode, in which the second clutch 3 is disengaged and the second planetary gear 9 is disconnected from the housing 7 via the separator 4.

[0070] It should be noted that in the second planetary gear set 9, the power transmission must meet the three-element constraint relationship of "input-fixed-output". When the second clutch 3 is disengaged and the fixed element of the second planetary gear set 9 is disconnected from the housing 7, the power of the second planetary gear set 9 cannot form an effective transmission path.

[0071] Specifically, the input element of the second planetary gear 9 drives the planetary gears to rotate, but the planetary gears are in a "free-spinning" state due to the lack of fixed constraints, and cannot transmit power to the output element. Since the output element cannot obtain effective driving torque, the second half-shaft 6 connected to the output element naturally loses power, realizing mechanical disconnection. The disconnection mode can realize the controllable cutting off of power flow and efficient energy management.

[0072] This embodiment also provides a vehicle, including a body and the aforementioned drive unit 10, with the drive unit 10 mounted on the body. The vehicle should also include wheels, with the first half-shaft 5 and the second half-shaft 6 each connected to a wheel. The drive unit 10 drives the wheels to rotate, thereby propelling the vehicle forward or backward.

[0073] It should be noted that the vehicle provided in this embodiment should also include other modules or components that enable the vehicle to operate normally. Here, these other modules or components will not be described one by one.

[0074] The vehicle provided in this embodiment, by adopting the aforementioned drive device 10, enables the vehicle to have functions such as gear shifting, torque vector control, and differential, thereby significantly improving the vehicle's performance.

[0075] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A driving device, characterized in that, It includes an input shaft, a first clutch, a second clutch, a separator, a first half-shaft, a second half-shaft, a housing, a first planetary gear set, and a second planetary gear set; The first planetary gear set and the second planetary gear set are installed in the housing. The first planetary gear set is a single planetary gear set. The first planetary gear set includes a first ring gear, a first planet carrier, and a first sun gear. The first ring gear is driven to the input shaft. The first planet carrier is driven to the first half-shaft and is driven to the first ring gear through the first clutch. The second planetary gear set is a double planetary gear set. The first sun gear is connected to the second half-shaft via the second planetary gear set. The second planetary gear set is connected to the first ring gear via the second clutch. The second planetary gear set is connected to or disconnected from the housing via the separator. The second planetary gear set is used to drive the second half-shaft to rotate in the same direction as the first half-shaft. Both the first clutch and the second clutch have an engaged state, a slipping state, and a disengaged state. When the first clutch switches from the engaged state or the disengaged state to the slipping state, the driving torque transmitted from the input shaft to the first half-shaft decreases. When the second clutch switches from the engaged state or the disengaged state to the slipping state, the driving torque transmitted from the input shaft to the second half-shaft decreases.

2. The driving device according to claim 1, characterized in that, The drive device has a first gear and a second gear; When the first clutch and the second clutch are in the disengaged state, and the second planetary gear set is connected to the housing through the separator, the drive unit is in the first gear. When both the first clutch and the second clutch are engaged, and the second planetary gear set is disconnected from the housing via the separator, the drive unit is in the second gear position.

3. The driving device according to claim 1, characterized in that, The second planetary gear set includes a second ring gear, a second planetary carrier, and a second sun gear. The second sun gear is driven to the first sun gear, the second planetary carrier is driven to the second half-shaft, and the second planetary carrier is driven to the first ring gear through the second clutch. The second ring gear is connected to or disconnected from the housing through the separator.

4. The driving device according to claim 2, characterized in that, The first clutch is connected to the input shaft in a driving connection, and the second clutch is also connected to the input shaft in a driving connection.

5. The driving device according to claim 1, characterized in that, The drive device also includes a power source and a transmission structure, wherein the power source is connected to the transmission structure and the transmission structure is connected to the input shaft.

6. The driving device according to claim 5, characterized in that, The output shaft of the power source is perpendicular to the axial direction of the input shaft, and the output shaft of the power source has a first helical gear, the transmission structure has a second helical gear, and the second helical gear meshes with the first helical gear.

7. The driving device according to claim 5, characterized in that, The output shaft of the power source is parallel to the axial direction of the input shaft, and the output shaft of the power source has a first spur gear, the transmission structure has a second spur gear, and the second spur gear meshes with the first spur gear.

8. The driving device according to claim 1, characterized in that, The first planetary set and the second planetary set are arranged along their axial direction.

9. The driving device according to claim 1, characterized in that, The drive unit also has a disconnect mode, in which the second clutch is in the disconnected state and the second planetary gear set is disconnected from the housing through the separator.

10. A vehicle, characterized in that, It includes a vehicle body and a drive unit as described in any one of claims 1 to 9, wherein the drive unit is mounted on the vehicle body.

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