Planetary gear shaft assembly, differential mechanism, transmission, power assembly and vehicle

Abstract

The invention discloses a planetary gear shaft assembly, a differential mechanism, a transmission, a power assembly and a vehicle. The planetary gear shaft assembly comprises a shaft body and a locking device. The planetary gear shaft assembly is used for the differential mechanism. A planetary gear is rotatably arranged on a shaft body in a sleeving mode. The locking device is arranged on the shaft body and used for locking the planetary gear to enable the planetary gear and the shaft body to rotate synchronously or releasing the planetary gear to enable the planetary gear to rotate relative to the shaft body. According to the planetary gear shaft assembly, the differential mechanism can be locked or released by the planetary gear shaft assembly according to different road conditions, so that slipping of driving wheels is avoided, power loss is prevented, and the running safety, stability and controllability of a vehicle can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a planetary gear shaft assembly, a differential, a transmission, a powertrain and a vehicle. Background Art

[0002] In the related art, vehicles are usually equipped with a differential, which can effectively distribute the torque output by the power source to the drive wheels on the left and right sides of the vehicle, so that the vehicle can ensure normal driving when turning or driving on rough roads. However, the existence of the differential means that when one drive wheel of the vehicle slips, the power cannot be effectively transmitted to the other drive wheel, resulting in power loss, affecting the driving safety, stability and handling of the vehicle. 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 provides a planetary gear shaft assembly, which can lock or release the differential according to different road conditions, thereby avoiding drive wheel slip and preventing power loss, and can improve the driving safety, stability and controllability of the vehicle.

[0004] The present invention also provides a differential, which includes the planetary gear shaft assembly mentioned above.

[0005] The present invention also provides a transmission, which includes the above-mentioned differential.

[0006] The present invention also provides a power assembly, which includes the above-mentioned transmission.

[0007] The present invention also provides a vehicle, comprising the above-mentioned power assembly.

[0008] According to an embodiment of the present invention, a planetary gear shaft assembly comprises: a shaft body and a locking device. The planetary gear shaft assembly is used for a differential, and a planetary gear is rotatably sleeved on the shaft body; the locking device is arranged on the shaft body, and is used to lock the planetary gear so that the planetary gear rotates synchronously with the shaft body or release the planetary gear so that the planetary gear can rotate relative to the shaft body.

[0009] According to the planetary gear shaft assembly of the embodiment of the present invention, by using the planetary gear shaft assembly for the differential, and making the planetary gear rotatably sleeved on the shaft body, and at the same time providing a locking device for locking or releasing the planetary gear on the shaft body, the planetary gear shaft assembly can be used to lock or release the differential according to different road conditions. When the vehicle is driving on normal road conditions, the differential is released, and the planetary gear can rotate relative to the shaft body, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to meet the driving requirements of the vehicle under different road conditions. When the vehicle is driving on special road conditions such as one side of the driving wheel slipping or hanging, the differential is locked, and the planetary gear rotates synchronously with the shaft body, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0010] According to some embodiments of the present invention, the locking device is used to change the diameter of the shaft body. When the locking device locks the planetary gear, the diameter of the shaft body is a, and the planetary gear is interference fit with the shaft body. When the locking device releases the planetary gear, the diameter of the shaft body is b, and a>b is satisfied.

[0011] In some embodiments of the present invention, the shaft body has a cavity extending in the axial direction of the shaft body, the cavity is used to contain a pressure medium, and the locking device includes an actuator, and the actuator is connected to the shaft body.

[0012] In some embodiments of the present invention, the cavity is opened at one end along the axial direction of the shaft body to form an open opening, the locking device also includes a seal, the seal is arranged in the cavity, and is used to seal the oil pressure medium in the cavity, the actuator has a linear motion component, the linear motion component is movable along the axial direction of the shaft body, one end of the linear motion component extends into the cavity and stops against the seal.

[0013] In some embodiments of the present invention, a boss is provided on the inner peripheral wall of the cavity, and the sealing member is located on a side of the boss away from the open opening and abuts against the boss.

[0014] In some embodiments of the present invention, the boss is in the form of a ring extending along the circumferential direction of the shaft body; or, the boss is a plurality of bosses arranged at intervals along the circumferential direction of the shaft body.

[0015] In some embodiments of the present invention, the linear motion component is a screw, and the actuator also includes a rotating member and a rotating motor, wherein the rotating member is sleeved outside the screw and cooperates with the screw; the rotating motor is connected to the shaft body, and the rotating motor is used to drive the rotating member to rotate to drive the linear motion component to move.

[0016] In some embodiments of the present invention, the actuator is a linear motor.

[0017] In some embodiments of the present invention, a mounting portion for fixing the shaft body is provided on the outer peripheral wall of the shaft body, and the planetary gear shaft assembly is suitable for being connected to the differential through the mounting portion.

[0018] In some embodiments of the present invention, the mounting portion is an annular protrusion extending along the circumferential direction of the shaft body.

[0019] In some embodiments of the present invention, the mounting portion is adapted to be connected to the differential by fasteners, and the fasteners are a plurality of fasteners spaced apart along the circumferential direction of the shaft body.

[0020] The differential according to the embodiment of the present invention comprises: a housing, the above-mentioned planetary gear shaft assembly and planetary gears. The shaft body is fixedly connected to the housing; and the planetary gear is sleeved on the shaft body.

[0021] According to the differential of the embodiment of the present invention, by making the planetary gear rotatably sleeved on the shaft body, and at the same time providing a locking device for locking or releasing the planetary gear on the shaft body, the planetary gear shaft assembly can lock or release the differential according to different road conditions. When the vehicle is traveling on normal road conditions, the differential is released, and the planetary gear can rotate relative to the shaft body, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving needs of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential is locked, and the planetary gear rotates synchronously with the shaft body, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0022] In some embodiments of the present invention, two planetary gears are sleeved on the shaft body, and the two planetary gears are spaced apart along the axial direction of the shaft body.

[0023] A transmission according to an embodiment of the present invention includes: the above-mentioned differential.

[0024] According to the transmission of the embodiment of the present invention, by making the planetary gear rotatably sleeved on the shaft body, and at the same time providing a locking device for locking or releasing the planetary gear on the shaft body, the planetary gear shaft assembly can lock or release the differential according to different road conditions. When the vehicle is traveling on normal road conditions, the differential is released, and the planetary gear can rotate relative to the shaft body, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving needs of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential is locked, and the planetary gear rotates synchronously with the shaft body, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0025] A powertrain according to an embodiment of the present invention includes: the above-mentioned transmission.

[0026] According to the powertrain of the embodiment of the present invention, by making the planetary gear rotatably sleeved on the shaft body, and at the same time providing a locking device for locking or releasing the planetary gear on the shaft body, the planetary gear shaft assembly can lock or release the differential according to different road conditions. When the vehicle is driving on normal road conditions, the differential is released, and the planetary gear can rotate relative to the shaft body, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving needs of the vehicle under different road conditions. When the vehicle is driving on special road conditions such as one side of the driving wheel slipping or hanging, the differential is locked, and the planetary gear rotates synchronously with the shaft body, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0027] A vehicle according to an embodiment of the present invention includes: the above-mentioned power assembly.

[0028] According to the vehicle of the embodiment of the present invention, by making the planetary gear rotatably sleeved on the shaft body, and at the same time providing a locking device for locking or releasing the planetary gear on the shaft body, the planetary gear shaft assembly can lock or release the differential according to different road conditions. When the vehicle is traveling on normal road conditions, the differential is released, and the planetary gear can rotate relative to the shaft body, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving needs of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential is locked, and the planetary gear rotates synchronously with the shaft body, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 is a cross-sectional view of a differential according to an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a planetary gear shaft assembly according to an embodiment of the present invention;

[0033] Figure 3 is a perspective view of a planetary gear shaft assembly according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 100. Planetary gear shaft assembly;

[0036] 1. shaft body; 11. cavity; 111. open mouth; 112. pressure medium; 12. boss; 13. mounting portion; 14. fastener;

[0037] 2. Locking device; 21. Sealing member; 22. Actuator; 221. Linear motion member;

[0038] 200, Differential;

[0039] 3. Housing; 31. First output shaft opening; 32. Second output shaft opening;

[0040] 4. Planetary gear;

[0041] 5. First axle gear;

[0042] 6. Second half-shaft gear. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Reference below Figure 1-Figure 3 A planetary gear shaft assembly 100 according to an embodiment of the present invention is described.

[0047] like Figure 2 and Figure 3 As shown, the planetary gear shaft assembly 100 according to an embodiment of the present invention includes a shaft body 1 and a locking device 2 .

[0048] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the planetary gear shaft assembly 100 is used for the differential 200, and the planetary gear 4 is rotatably sleeved on the shaft body 1. The differential 200 includes a housing 3, and the shaft body 1 is penetrated through the housing 3 and fixedly connected to the housing 3, so that the planetary gear shaft assembly 100 can rotate synchronously with the housing 3 of the differential 200. The differential 200 also includes a first half-shaft gear 5 and a second half-shaft gear 6, and the first half-shaft gear 5 and the second half-shaft gear 6 are respectively arranged at the axial ends in the housing 3. The differential 200 is suitable for a vehicle, and the first half-shaft gear 5 and the second half-shaft gear 6 are respectively connected to the driving wheels at both ends of the vehicle.

[0049] In addition, there can be multiple planetary gears 4, and the multiple planetary gears 4 are rotatably sleeved on the shaft body 1. In the axial direction of the differential 200, the first side gear 5 and the second side gear 6 are respectively located on both sides of the multiple planetary gears 4, and the first side gear 5 and the second side gear 6 are meshed with the multiple planetary gears 4. When the vehicle is running, the housing 3 of the differential 200 can drive the planetary gear shaft assembly 100 to rotate synchronously, thereby driving the multiple planetary gears 4 to rotate around the rotation axis of the differential 200, and then driving the first side gear 5 and the second side gear 6 to rotate around the rotation axis of the differential 200. In this way, torque transmission can be achieved, thereby driving the drive wheel to rotate to ensure normal driving of the vehicle.

[0050] Furthermore, the locking device 2 is arranged on the shaft body 1, and is used to lock the planetary gear 4 so that the planetary gear 4 rotates synchronously with the shaft body 1 or release the planetary gear 4 so that the planetary gear 4 can rotate relative to the shaft body 1. Thus, the planetary gear shaft assembly 100 can lock the differential 200 or release the differential 200 according to different road conditions.

[0051] When the vehicle is traveling on a normal road, the locking device 2 releases the planetary gear 4, and the planetary gear 4 can rotate relative to the shaft body 1. That is, the planetary gear shaft assembly 100 allows the planetary gear 4 to rotate around the shaft body 1, thereby allowing the first side shaft gear 5 and the second side shaft gear 6 to rotate at the same or different speeds, thereby enabling the driving wheels at both ends of the vehicle to rotate at the same or different angular speeds as required, so as to adapt to the driving requirements of the vehicle under different road conditions (such as turning the vehicle or driving on an uneven road), thereby improving the driving stability and controllability of the vehicle.

[0052] When the vehicle is driving on special road conditions, such as when one side of the driving wheel of the vehicle slips or even leaves the ground, the locking device 2 locks the planetary gear 4, and the planetary gear 4 is forced to rotate synchronously with the shaft body 1. The shaft body 1 is inserted into the housing 3 and is fixedly connected to the housing 3. Driven by the housing 3, the planetary gear 4 and the shaft body 1 only rotate around the rotation axis of the housing 3. At this time, the first side gear 5 and the second side gear 6 rotate at the same speed and in the same direction under the transmission of the planetary gear 4.

[0053] This can limit the speed difference between the two drive wheels in special road conditions such as muddy, slippery or one drive wheel slipping, thereby limiting the drive wheel slipping and avoiding the vehicle losing control due to drive wheel slipping, thereby improving the vehicle's driving safety and stability. It can also optimize power distribution, thereby better solving the problem of uneven power transmission when one drive wheel slips, effectively preventing power loss, and further improving the vehicle's driving stability and controllability.

[0054] According to the planetary gear shaft assembly 100 of the embodiment of the present invention, by using the planetary gear shaft assembly 100 for the differential 200, and making the planetary gear 4 rotatably sleeved on the shaft body 1, and at the same time providing the locking device 2 for locking or releasing the planetary gear 4 on the shaft body 1, the planetary gear shaft assembly 100 can lock or release the differential 200 according to different road conditions. When the vehicle is driving on normal road conditions, the differential 200 is released, and the planetary gear 4 can rotate relative to the shaft body 1, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving requirements of the vehicle under different road conditions. When the vehicle is driving on special road conditions such as one side of the driving wheel slipping or hanging, the differential 200 is locked, and the planetary gear 4 rotates synchronously with the shaft body 1, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and controllability of the vehicle.

[0055] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the locking device 2 is used to change the diameter of the shaft body 1. When the locking device 2 locks the planetary gear 4, the diameter of the shaft body 1 is a, and the planetary gear 4 and the shaft body 1 are interference fit. When the locking device 2 releases the planetary gear 4, the diameter of the shaft body 1 is b, and a>b is satisfied. The locking device 2 can change the diameter of the shaft body 1 according to different road conditions, so that the friction between the shaft body 1 and the planetary gear 4 increases or decreases, so as to lock or release the rotation of the planetary gear 4, thereby achieving the purpose of locking the differential 200 or releasing the differential 200.

[0056] It is understandable that when the vehicle is traveling on a special road condition where one driving wheel is slipping or hanging, the locking device 2 can increase the diameter of the shaft body 1 to a, increase the friction between the shaft body 1 and the planetary gear 4, and the planetary gear 4 is interference fit with the shaft body 1, so that the planetary gear 4 cannot rotate relative to the shaft body 1, and the planetary gear 4 can only rotate synchronously with the shaft body 1. Driven by the housing 3, the planetary gear 4 and the shaft body 1 rotate around the rotation axis of the housing 3, thereby limiting the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and thus improving the driving safety and stability of the vehicle. It can also optimize power distribution, avoid uneven power transmission of the driving wheels on both sides, thereby effectively preventing power loss, and further improving the driving stability and handling of the vehicle.

[0057] Furthermore, when the vehicle is traveling on normal roads, the locking device 2 can reduce the diameter of the shaft body 1 to b, thereby reducing the friction between the shaft body 1 and the planetary gear 4. The planetary gear 4 can rotate relative to the shaft body 1, so that the driving wheels at both ends of the vehicle can rotate at the same or different angular velocities as needed to adapt to the driving needs of the vehicle under different road conditions.

[0058] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the shaft body 1 has a cavity 11 extending in the axial direction of the shaft body 1, and one end of the cavity 11 in the axial direction of the shaft body 1 is open to form an open port 111. The cavity 11 is used to contain a pressure medium 112. The locking device 2 includes a seal 21 and an actuator 22. The seal 21 is disposed in the cavity 11 and is used to seal the pressure medium 112 in the cavity 11. The actuator 22 is connected to the shaft body 1, and the actuator 22 has a linear motion component 221. The linear motion component 221 is movable in the axial direction of the shaft body 1, and one end of the linear motion component 221 extends into the cavity 11 and abuts against the seal 21.

[0059] It can be understood that the open mouth 111 of the cavity 11 facilitates the linear motion component 221 to extend into the cavity 11 and move along the axial direction of the shaft body 1, and the seal 21 can block the open mouth 111 of the cavity 11 to prevent the pressure medium 112 from leaking from the open mouth 111 and causing the performance of the locking device 2 to lock the planetary gear 4 to deteriorate.

[0060] When the locking device 2 locks the planetary gear 4, along the axial direction of the shaft body 1, the linear motion component 221 moves toward the seal 21 under the drive of the actuator 22. At this time, the linear motion component 221 pushes the seal 21 to move toward the bottom wall of the cavity 11, and the pressure medium 112 in the cavity 11 is compressed. The shaft body 1 expands under the pressure of the pressure medium 112, so that the diameter of the shaft body 1 increases to a. At this time, the planetary gear 4 and the shaft body 1 are interference fit, and the friction between the shaft body 1 and the planetary gear 4 increases, so that the planetary gear 4 cannot rotate relative to the shaft body 1. The planetary gear 4 can only rotate synchronously with the shaft body 1 around the rotation axis of the housing 3, thereby limiting the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, thereby improving the driving safety and stability of the vehicle. It can also optimize the power distribution, avoid uneven power transmission of the driving wheels on both sides, thereby effectively preventing power loss, and further improving the driving stability and controllability of the vehicle.

[0061] Furthermore, when the vehicle is traveling on a normal road, along the axial direction of the shaft body 1, the linear motion component 221 moves in a direction away from the seal 21 under the drive of the actuator 22, and the seal 21 moves toward the open port 111 of the cavity 11 under the pressure of the pressure medium 112, and the pressure medium 112 in the cavity 11 returns to a natural state, so that the diameter of the shaft body 1 is reduced and restored to b. The friction between the shaft body 1 and the planetary gear 4 is reduced, and the planetary gear 4 can rotate relative to the shaft body 1, thereby realizing that the driving wheels at both ends of the vehicle rotate at the same or different angular velocities as required to meet the driving needs of the vehicle under different road conditions (such as turning or driving on uneven roads).

[0062] In the present application, the shaft body 1 provided with the cavity 11 containing the pressure medium 112 cooperates with the locking device 2 provided with the seal 21 and the actuator 22 to lock or release the rotation of the planetary gear 4, thereby achieving the purpose of locking the differential 200 or releasing the differential 200. No other complex components need to be added, the structure is simple and the layout is reasonable, which can save the space occupied by the differential 200 and control the cost.

[0063] In some embodiments, the locking device 2 can completely lock or completely release the planetary gear 4. The locking device 2 can also be in a state between completely locking and completely releasing the planetary gear 4, that is, the driving force of the linear motion component 221 can be driven by actively controlling the actuator 22, thereby adjusting the pressure applied to the pressure medium 112 by the linear motion component 221 and the seal 21, so that the diameter of the shaft body 1 is between b and a, and the planetary gear shaft assembly 100 can adjust the degree of locking or releasing the differential 200 according to different road conditions, which can further improve the vehicle's controllability and adaptability to different road conditions.

[0064] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the inner peripheral wall of the cavity 11 is provided with a boss 12, and the sealing member 21 is located on the side of the boss 12 away from the open opening 111 and abuts against the boss 12. The boss 12 plays a positioning and limiting role, which can prevent the sealing member 21 from escaping from the open opening 111, thereby ensuring the sealing effect of the pressure medium 112 in the cavity 11, avoiding leakage of the pressure medium 112, and thereby ensuring the function and effect of the locking device 2 locking the planetary gear 4.

[0065] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the boss 12 is annular and extends along the circumferential direction of the shaft body 1, so that it can match the inner circumferential wall of the cavity 11 and the seal 21, and evenly limit the seal 21 in the circumferential direction, thereby improving the positioning and limiting effects of the boss 12, and can better prevent the seal 21 from escaping from the open mouth 111, thereby improving the sealing effect of the pressure medium 112 in the cavity 11, avoiding leakage of the pressure medium 112, and thus ensuring the function and effect of the locking device 2 to lock the planetary gear 4.

[0066] In another embodiment of the present invention, a plurality of bosses 12 are arranged at intervals along the circumferential direction of the shaft body 1, and the plurality of bosses 12 can be limited at different positions in the circumferential direction of the seal 21, thereby improving the positioning and limiting effects of the boss 12, and can better prevent the seal 21 from escaping from the open opening 111, thereby improving the sealing effect of the pressure medium 112 in the cavity 11, avoiding leakage of the pressure medium 112, and thereby ensuring the function and effect of the locking device 2 to lock the planetary gear 4.

[0067] In some embodiments of the present invention, the linear motion component 221 is a screw, and the actuator 22 further includes a rotating member and a rotating motor, and the rotating member is sleeved outside the screw and cooperates with the screw. The rotating motor is connected to the shaft body 1, and the rotating motor is used to drive the rotating member to rotate to drive the linear motion component 221 to move. The screw and the rotating member are simple to cooperate with each other and the transmission is stable. The rotational motion of the screw driven by the rotating motor can be converted into the linear motion of the rotating member along the length direction of the screw, and the motion conversion effect is relatively reliable. It can also realize the self-locking function. When the rotating member stops moving, the rotating motor does not need to keep the torque all the time, thereby reducing energy consumption.

[0068] The rotating member is sleeved on the screw and can move along the length direction of the screw. Specifically, the screw may be provided with a spiral groove, the inner peripheral wall of the rotating member may be provided with an internal thread corresponding to the spiral groove, and a ball may be provided between the spiral groove of the screw and the internal thread of the rotating member. When the screw rotates, the ball rolls between the spiral groove of the screw and the internal thread of the rotating member, which can reduce friction, make the screw and the rotating member move relatively more smoothly, and convert the rotational motion of the screw into the linear motion of the rotating member along the length direction of the screw.

[0069] In some embodiments of the present invention, the actuator 22 is a linear motor. The linear motor can directly drive the linear motion component 221 to move along the axial direction of the shaft body 1, without the need for an additional device to convert the rotary motion into the linear motion, which can simplify the structure of the locking device 2, reduce the number and complexity of parts, and thus reduce the weight, volume and cost of the planetary gear shaft assembly 100.

[0070] In some embodiments of the present invention, Figure 1-Figure 3 As shown, a mounting portion 13 for fixing the shaft body 1 is provided on the outer peripheral wall of the shaft body 1, and the planetary gear shaft assembly 100 is suitable for being connected to the differential 200 through the mounting portion 13. Specifically, the differential 200 includes a housing 3, and the mounting portion 13 is connected to the housing 3. The mounting portion 13 is provided at one end of the shaft body 1 in the length direction and sleeved on the shaft body 1, thereby ensuring that the shaft body 1 can be inserted into the housing 3, and at the same time, the shaft body 1 is conveniently fixedly connected to the housing 3, thereby ensuring that the shaft body 1 and the housing 3 rotate synchronously, which can reduce the difficulty of assembly, thereby improving the assembly efficiency.

[0071] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the mounting portion 13 is an annular protrusion extending in the circumferential direction of the shaft body 1, so that the mounting portion 13 is suitable for matching and connecting with the tubular shaft body 1, ensuring the connection area between the mounting portion 13 and the shaft body 1 in the circumferential direction of the shaft body 1, thereby enhancing the connection strength between the mounting portion 13 and the shaft body 1. It is also convenient to connect the shaft body 1 and the housing 3 through the mounting portion 13, and can enhance the connection stability between the shaft body 1 and the housing 3 in the circumferential direction of the shaft body 1.

[0072] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the mounting portion 13 is suitable for being connected to the differential 200 through a fastener 14, and the fastener 14 is a plurality of fasteners spaced apart along the circumferential direction of the shaft body 1. Specifically, the differential 200 includes a housing 3, and the mounting portion 13 is connected to the housing 3 through a fastener, which can not only ensure the connection stability between the mounting portion 13 and the housing 3, but also improve the convenience of the connection between the mounting portion 13 and the housing 3, and can also achieve a detachable connection for later maintenance. Multiple fasteners 14 can further enhance the connection stability between the mounting portion 13 and the housing 3, and can also disperse stress, thereby extending the service life of the mounting portion 13 and the housing 3.

[0073] The differential 200 according to the embodiment of the present invention will be described below.

[0074] The differential 200 according to the embodiment of the present invention comprises: a housing 3 , the above-mentioned planetary gear shaft assembly 100 , and planetary gears 4 .

[0075] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the shaft body 1 is fixedly connected to the housing 3 and rotates synchronously, and the planetary gear 4 is sleeved on the shaft body 1 .

[0076] The housing 3 has a first output shaft opening 31 and a second output shaft opening 32 at both axial ends thereof. The differential 200 further includes a first side gear 5 and a second side gear 6, which are disposed in the housing 3. The rotation axes of the housing 3, the first side gear 5 and the second side gear 6 coincide. The differential 200 is suitable for a vehicle. The first output shaft is passed through the first output shaft opening 31 to be meshed and connected with the first side gear 5. The second output shaft is passed through the second output shaft opening 32 to be meshed and connected with the second side gear 6. One end of the first output shaft away from the housing 3 and one end of the second output shaft away from the housing 3 are respectively connected to two driving wheels of the vehicle. In addition, the planetary gear 4 may be multiple, and the multiple planetary gears 4 are rotatably sleeved on the shaft body 1. In the axial direction of the differential 200, the first side gear 5 and the second side gear 6 are respectively located on both sides of the multiple planetary gears 4, and the first side gear 5 and the second side gear 6 are meshed with the multiple planetary gears 4.

[0077] When the vehicle is running, the housing 3 of the differential 200 can drive the planetary gear shaft assembly 100 to rotate synchronously, thereby driving the plurality of planetary gears 4 to rotate around the rotation axis of the differential 200, and then driving the first side shaft gear 5 and the second side shaft gear 6 to rotate around the rotation axis of the differential 200, and then driving the first output shaft and the second output shaft to rotate around the rotation axis of the differential 200. In this way, torque transmission can be achieved, thereby driving the driving wheels to rotate to ensure normal driving of the vehicle.

[0078] Furthermore, the locking device 2 is provided on the shaft body 1, and is used to lock the planetary gear 4 so that the planetary gear 4 rotates synchronously with the shaft body 1 or release the planetary gear 4 so that the planetary gear 4 can rotate relative to the shaft body 1. Thus, the planetary gear shaft assembly 100 can lock the differential 200 or release the differential 200 according to different road conditions.

[0079] When the vehicle is traveling on a normal road, the locking device 2 releases the planetary gear 4, and the planetary gear 4 can rotate relative to the shaft body 1. That is, the planetary gear shaft assembly 100 allows the planetary gear 4 to rotate around the shaft body 1, thereby allowing the first side shaft gear 5 and the second side shaft gear 6 to rotate at the same or different speeds, thereby enabling the driving wheels at both ends of the vehicle to rotate at the same or different angular speeds as required, so as to adapt to the driving requirements of the vehicle under different road conditions (such as turning the vehicle or driving on an uneven road), thereby improving the driving stability and controllability of the vehicle.

[0080] When the vehicle is driving on special road conditions, such as when one side of the driving wheel of the vehicle slips or even leaves the ground, the locking device 2 locks the planetary gear 4, and the planetary gear 4 is forced to rotate synchronously with the shaft body 1. The shaft body 1 is inserted into the housing 3 and is fixedly connected to the housing 3. Driven by the housing 3, the planetary gear 4 and the shaft body 1 only rotate around the rotation axis of the housing 3. At this time, the first side gear 5 and the second side gear 6 rotate at the same speed and in the same direction under the transmission of the planetary gear 4.

[0081] This can limit the speed difference between the two drive wheels in special road conditions such as muddy, slippery or one drive wheel slipping, thereby limiting the drive wheel slipping and avoiding the vehicle losing control due to drive wheel slipping, thereby improving the vehicle's driving safety and stability. It can also optimize power distribution, thereby better solving the problem of uneven power transmission when one drive wheel slips, effectively preventing power loss, and further improving the vehicle's driving stability and controllability.

[0082] According to the differential 200 of the embodiment of the present invention, by making the planetary gear 4 rotatably sleeved on the shaft body 1, and at the same time providing the locking device 2 for locking or releasing the planetary gear 4 on the shaft body 1, the planetary gear shaft assembly 100 can lock or release the differential 200 according to different road conditions. When the vehicle is traveling on normal road conditions, the differential 200 is released, and the planetary gear 4 can rotate relative to the shaft body 1, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving requirements of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential 200 is locked, and the planetary gear 4 rotates synchronously with the shaft body 1, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0083] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, two planetary gears 4 are sleeved on the shaft body 1, and the two planetary gears 4 are spaced apart along the axial direction of the shaft body 1. The two planetary gears 4 can flexibly adjust the speed difference between the first half-shaft gear 5 and the second half-shaft gear 6 by revolving around the rotation axis of the differential 200 and rotating around the axial direction of the shaft body 1, so that the driving wheels at both ends of the vehicle can rotate at the same or different angular speeds as required to meet the driving needs of the vehicle under different road conditions. The two planetary gears 4 can share the load together, making the transmission smoother and more stable, thereby improving the transmission efficiency and transmission stability, and extending the service life of the differential 200.

[0084] A transmission according to an embodiment of the present invention includes: the differential 200 mentioned above.

[0085] According to the transmission of the embodiment of the present invention, by making the planetary gear 4 rotatably sleeved on the shaft body 1, and at the same time providing the locking device 2 for locking or releasing the planetary gear 4 on the shaft body 1, the planetary gear shaft assembly 100 can lock or release the differential 200 according to different road conditions. When the vehicle is traveling on normal road conditions, the differential 200 is released, and the planetary gear 4 can rotate relative to the shaft body 1, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving requirements of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential 200 is locked, and the planetary gear 4 rotates synchronously with the shaft body 1, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0086] A powertrain according to an embodiment of the present invention includes: the above-mentioned transmission.

[0087] The powertrain may specifically be an electric assembly, a fuel assembly or a hybrid assembly.

[0088] According to the powertrain of the embodiment of the present invention, by making the planetary gear 4 rotatably sleeved on the shaft body 1, and at the same time providing the locking device 2 for locking or releasing the planetary gear 4 on the shaft body 1, the planetary gear shaft assembly 100 can lock or release the differential 200 according to different road conditions. When the vehicle is driving on normal road conditions, the differential 200 is released, and the planetary gear 4 can rotate relative to the shaft body 1, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving requirements of the vehicle under different road conditions. When the vehicle is driving on special road conditions such as one side of the driving wheel slipping or hanging, the differential 200 is locked, and the planetary gear 4 rotates synchronously with the shaft body 1, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0089] A vehicle according to an embodiment of the present invention includes: the above-mentioned power assembly.

[0090] According to the vehicle of the embodiment of the present invention, by making the planetary gear 4 rotatably sleeved on the shaft body 1, and at the same time providing the locking device 2 for locking or releasing the planetary gear 4 on the shaft body 1, the planetary gear shaft assembly 100 can lock or release the differential 200 according to different road conditions. When the vehicle is traveling on normal road conditions, the differential 200 is released, and the planetary gear 4 can rotate relative to the shaft body 1, thereby allowing the driving wheels at both ends of the vehicle to rotate at the same or different speeds as required to adapt to the driving requirements of the vehicle under different road conditions. When the vehicle is traveling on special road conditions such as one side of the driving wheel slipping or hanging, the differential 200 is locked, and the planetary gear 4 rotates synchronously with the shaft body 1, which can limit the speed difference between the two driving wheels, thereby avoiding the driving wheel slipping or even the vehicle losing control, and can also optimize power distribution, effectively prevent power loss, and thus improve the driving safety, stability and handling of the vehicle.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A planetary gear shaft assembly, characterized in that: For use with a differential planetary gear shaft assembly and comprising: A shaft body planetary gear shaft assembly, the planetary gear planetary gear shaft assembly is rotatably sleeved on the shaft body planetary gear shaft assembly; A locking device planetary gear shaft assembly, wherein the locking device planetary gear shaft assembly is arranged on the shaft body planetary gear shaft assembly, and is used to lock the planetary gear planetary gear shaft assembly so that the planetary gear planetary gear shaft assembly and the shaft body planetary gear shaft assembly rotate synchronously or release the planetary gear planetary gear shaft assembly so that the planetary gear planetary gear shaft assembly can rotate relative to the shaft body planetary gear shaft assembly.

2. The planetary gear shaft assembly according to claim 1, characterized in that: The locking device planetary gear shaft assembly is used to change the diameter of the shaft body planetary gear shaft assembly. When the locking device planetary gear shaft assembly locks the planetary gear shaft assembly, the diameter of the shaft body planetary gear shaft assembly is a, and the planetary gear shaft assembly is interference fit with the shaft body planetary gear shaft assembly. When the locking device planetary gear shaft assembly releases the planetary gear shaft assembly, the diameter of the shaft body planetary gear shaft assembly is b, and a>b is satisfied.

3. The planetary gear shaft assembly according to claim 2, characterized in that: The shaft body planetary gear shaft assembly has a cavity planetary gear shaft assembly extending in the axial direction of the shaft body planetary gear shaft assembly, the cavity planetary gear shaft assembly is used to hold the pressure medium planetary gear shaft assembly, and the locking device planetary gear shaft assembly includes: An actuator planetary gear shaft assembly is connected to the shaft body planetary gear shaft assembly.

4. The planetary gear shaft assembly according to claim 3, characterized in that: The cavity planetary gear shaft assembly is opened at one end along the axial direction of the shaft body planetary gear shaft assembly to form an open-mouth planetary gear shaft assembly, and the locking device planetary gear shaft assembly further includes: A sealing planetary gear shaft assembly, wherein the sealing planetary gear shaft assembly is arranged in the cavity planetary gear shaft assembly and is used to seal the oil pressure medium planetary gear shaft assembly in the cavity planetary gear shaft assembly, wherein the actuator planetary gear shaft assembly has a linear motion component planetary gear shaft assembly, wherein the linear motion component planetary gear shaft assembly is movable along the axial direction of the shaft body planetary gear shaft assembly, and one end of the linear motion component planetary gear shaft assembly extends into the cavity planetary gear shaft assembly and stops against the sealing planetary gear shaft assembly.

5. The planetary gear shaft assembly according to claim 4, characterized in that: A boss planetary gear shaft assembly is provided on the inner peripheral wall of the cavity planetary gear shaft assembly, and the sealing planetary gear shaft assembly is located on a side of the boss planetary gear shaft assembly away from the open-mouth planetary gear shaft assembly and abuts against the boss planetary gear shaft assembly.

6. The planetary gear shaft assembly according to claim 5, characterized in that: The boss planetary gear shaft assembly is annular and extends in the circumferential direction of the shaft body planetary gear shaft assembly; Alternatively, the boss planetary gear shaft assembly is a plurality of boss planetary gear shaft assemblies spaced apart in the circumferential direction of the shaft body planetary gear shaft assembly.

7. The planetary gear shaft assembly according to claim 4, characterized in that: The linear motion component planetary gear shaft assembly is a screw rod, and the actuator planetary gear shaft assembly also includes: A rotating member, which is sleeved outside the screw rod and cooperates with the screw rod; A rotary motor is used to drive the rotary member to rotate so as to drive the linear motion component planetary gear shaft assembly to move.

8. The planetary gear shaft assembly according to claim 4, characterized in that: The actuator planetary gear shaft assembly is a linear motor.

9. The planetary gear shaft assembly according to claim 4, characterized in that: A mounting portion planetary gear shaft assembly for fixing the shaft body planetary gear shaft assembly is provided on the outer peripheral wall of the shaft body planetary gear shaft assembly, and the planetary gear shaft assembly is suitable for being connected to the differential through the mounting portion planetary gear shaft assembly.

10. The planetary gear shaft assembly according to claim 9, characterized in that: The mounting portion planetary gear shaft assembly is an annular protrusion extending along the circumferential direction of the shaft body planetary gear shaft assembly.

11. The planetary gear shaft assembly according to claim 10, characterized in that: The mounting portion planetary gear shaft assembly is suitable for being connected to a differential through a fastener planetary gear shaft assembly, and the fastener planetary gear shaft assembly is a plurality of planetary gear shaft assemblies spaced apart in a circumferential direction of the shaft body planetary gear shaft assembly.

12. A differential, characterized in that: include: Housing planetary gear shaft assembly; According to any one of claims 1 to 11, the planetary gear shaft assembly, the shaft body planetary gear shaft assembly is fixedly connected to the housing planetary gear shaft assembly; A planetary gear planetary gear shaft assembly, wherein the planetary gear planetary gear shaft assembly is sleeved on the shaft body planetary gear shaft assembly.

13. The differential according to claim 12, characterized in that: Two planetary gear shaft assemblies are sleeved on the shaft body planetary gear shaft assembly, and the two planetary gear shaft assemblies are spaced apart along the axial direction of the shaft body planetary gear shaft assembly.

14. A transmission, characterized in that: Comprising a differential according to claim 12 or 13.

15. A powertrain, characterized in that: Comprising a transmission according to claim 14.

16. A vehicle, characterized in that: Comprising a powertrain according to claim 15.

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