Differential mechanism and vehicle

Abstract

The utility model discloses a differential mechanism and a vehicle. The differential mechanism comprises a shell, an input gear ring and a first half shaft. The first driven piece is arranged on the input gear ring and can synchronously rotate along with the input gear ring; the second driven piece is connected with the first half shaft and can synchronously rotate along with the first half shaft; the driving part is arranged on the shell, can synchronously rotate along with the shell and can axially move relative to the shell, the axial movement of the driving part relative to the shell has a first preset position, a second preset position and a third preset position, and the driving part is configured as follows: when the driving part reaches the first preset position, the driving part is combined with the first driven part and the second driven part; when reaching the second preset position, the driving part is combined with the first driven part and separated from the second driven part, and when reaching the third preset position, the driving part is separated from the first driven part and the second driven part; the driving device can drive the driving part to axially move relative to the shell, and three modes of differential speed, driving disconnection and slip limiting can be achieved through one driving device.

Description

Technical Field

[0001] The present application relates to the field of transmission technology, and in particular to a differential and a vehicle. Background Art

[0002] When the rear axle of the vehicle works as an auxiliary drive, the traditional differential will generate large losses under non-power demand conditions because the transmission components are dragged by the wheels and the transmission components are connected to the motor through the differential input ring gear. Therefore, the auxiliary drive motor and the transmission components are connected under power demand conditions through the first drive device, so that the first half-shaft connected to the first wheel and the second half-shaft connected to the second wheel can rotate differentially, and are disconnected under non-power demand conditions, which can effectively reduce passive losses and thereby increase the vehicle's cruising range. However, under certain road conditions, such as when the adhesion coefficient of the left first wheel differs greatly, power output cannot be achieved, resulting in the risk of the vehicle losing power under special working conditions. In order to ensure power output, it is necessary to add a second drive device to perform a limited slip function on the basis of being able to realize the function of a traditional differential, so that the differential housing, the first half-shaft and the second half-shaft rotate synchronously to limit the relative rotation of the transmission device in the differential housing, the first half-shaft engaged with the transmission device, and the second half-shaft. The current differential needs to control the first drive device and the second drive device accordingly to perform different functions, which has a relatively high control difficulty, requires a large space occupancy, and has a high production cost. Utility Model Content

[0003] In order to solve the above problems, the present application provides a differential and a vehicle.

[0004] According to one aspect of an embodiment of the present application, a differential is disclosed, the differential comprising a housing, an input ring gear, and a first half-shaft; a first driven member, arranged on the input ring gear, capable of rotating synchronously with the input ring gear; a second driven member, connected to the first half-shaft, capable of rotating synchronously with the first half-shaft; an active member, arranged on the housing, capable of rotating synchronously with the housing, and capable of axially moving relative to the housing, the active member having a first preset position, a second preset position, and a third preset position for axial movement relative to the housing, the active member being configured as follows: when the active member reaches the first preset position, the active member is combined with both the first driven member and the second driven member, when the active member reaches the second preset position, the active member is combined with the first driven member and separated from the second driven member, and when the active member reaches the third preset position, the active member is separated from both the first driven member and the second driven member; a driving device, capable of driving the active member to move axially relative to the housing.

[0005] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0006] The active member in the present application can rotate synchronously with the housing and can move axially relative to the housing. The first driven member rotates synchronously with the input gear ring, and the second driven member rotates synchronously with the first semi-axle. The active member is driven by the driving device to move axially along the housing. When the active member reaches the first preset position, the active member combines with the first driven member and the second driven member, and the housing, the input gear ring and the first semi-axle rotate synchronously to achieve a limited slip function. When the active member reaches the second preset position, the active member combines with the first driven member and is separated from the second driven member. The housing and the input gear ring rotate synchronously, and the housing, the first semi-axle and the second semi-axle rotate relatively to achieve a differential effect. When the active member reaches the third preset position, the active member is separated from the first driven member and the second driven member, and the housing is disconnected from the input gear ring to avoid power loss caused by the reverse separation of the drive unit corresponding to the input gear ring, thereby reducing power consumption under non-power requirements. The differential disclosed in the present application drives the active member to move axially along the housing through a driving device, realizing three functional modes of differential, drive disconnection and limited slip, so that the differential function is integrated, space occupancy is reduced, and production costs are reduced.

[0007] In an exemplary embodiment, the differential further includes a reset device, the reset device cooperates with the active member, and the reset device is configured to provide a reset force to the active member, and the direction of the reset force is opposite to the direction in which the driving device drives the active member to move. The reset device and the driving device respectively provide opposite reset forces for the active member, which can play a rigidity positioning effect on the driving of the driving device. When the driving device is required to drive the active member to switch back and forth between the first preset position, the second preset position and the third preset position, the driving force of the driving device can be offset, the phenomenon of the driving device driving the active member over-position can be reduced, and the driving accuracy can be improved.

[0008] In an exemplary embodiment, the driving device and the reset device are arranged on opposite sides of the active member, and the reset device includes a first reset group and a second reset group; the first reset group includes a plurality of first elastic members arranged at intervals around the input gear ring, the first elastic member is compressed and connected between the active member and the input gear ring, and one end of the first elastic member is slidably connected to one of the active member and the input gear ring; the second reset group includes a plurality of second elastic members arranged at intervals around the input gear ring, the first end of the second elastic member is connected to one of the active member and the input gear ring, and the second end of the second elastic member is arranged at intervals from the other of the active member and the input gear ring and faces the other. Under the mutual cooperation of the first reset group and the second reset group, the driving device enables the active member to be sequentially subjected to the two sections of stiffness exhibited by the reset device when moving and switching the working mode, thereby reducing the control difficulty and improving the movement accuracy of the active member.

[0009] In an exemplary embodiment, a stop block is provided on the input ring gear, the first end of the second elastic member is connected to the input ring gear, the second end of the second elastic member is compressed against the stop block, and the active member is opposite to the second end of the second elastic member; and / or the stiffness of the first elastic member is smaller than the stiffness of the second elastic member; and / or a pressing block is provided on the active member, and the pressing block faces the second elastic member; and / or the reset device includes a first annular plate and a second annular plate, the first annular plate is arranged on the input ring gear, the second annular plate bearing is connected to the active member, and a plurality of the first elastic members are connected between the first annular plate and the second annular plate at intervals. The second elastic member is compressed and arranged between the stop block and the active member, so that the second elastic member maintains a certain pre-tightening force, so that when the driving device drives the active member to move to contact the second reset group, it can offset the driving force of the driving device and hinder the active member from continuing to move, thereby avoiding the driving device from pushing the active member over position, further improving the displacement control accuracy of the active member, and the stop block can limit the compression length of the second elastic member, which not only reduces the vibration of the second elastic member, but also facilitates the meshing position of the corresponding active member with the first driven member and the second driven member respectively, reducing the accuracy requirements of product settings.

[0010] In an exemplary embodiment, the first reset group and the second reset group are arranged in inner and outer circles; and / or the first elastic member and the second elastic member are arranged alternately along the circumferential direction. A plurality of second elastic members are arranged in an annular shape around the inner or outer circumference of a plurality of first elastic members at intervals. When the active member moves and switches the working mode, it can be sequentially subjected to the two-stage stiffness exhibited by the reset device, thereby reducing the control difficulty and improving the moving accuracy of the active member.

[0011] In an exemplary embodiment, the first preset position, the second preset position and the third preset position are sequentially distributed in a direction away from the input gear ring; and / or the active member and the first driven member are coupled via tooth surfaces; and / or the active member and the second driven member are coupled via tooth surfaces. The driving device can drive the active member to sequentially pass through the first preset position, the second preset position and the third preset position and return sequentially, so that the differential can select one of the three modes of drive disconnection, differential, and limited slip, so that the differential function is integrated, the space occupation is reduced, and the production cost is reduced. In addition, the active member, the first driven member and the second driven member are coupled via tooth surfaces, so as to increase the contact area and reduce slip.

[0012] In an exemplary embodiment, the driving device includes an electromagnetic coil and a push ring, the push ring is against the active member, and the electromagnetic coil is configured to control the push ring to move back and forth along the axial direction of the housing, thereby pushing the active member to select one of the first preset position, the second preset position, or the third preset position. By energizing or de-energizing the electromagnetic coil, and changing the magnitude of the energization of the electromagnetic coil, the push ring moves axially under the electromagnetic action, thereby driving the active member to move axially along the input gear ring, thereby realizing the three functional modes of differential, drive disconnection, and limited slip, so that the differential function is integrated, the space occupation is reduced, and the production cost is reduced.

[0013] In an exemplary embodiment, the differential further includes a second half shaft and a transmission device, the first half shaft is rotationally connected to the input gear ring, the second half shaft is rotationally connected to the housing, the transmission device includes a planetary gear set, a first gear and a second gear, the planetary gear set is synchronously connected to the housing, the first gear is arranged at one end of the first half shaft, the second gear is arranged at one end of the second half shaft, the first gear and the second gear are respectively meshed and transmitted to the planetary gear set, and the second driven member is arranged on the first gear. The driving member, the housing and the planetary gear set rotate synchronously, and the driving member is driven to move axially along the housing through a driving device, realizing the three functional modes of differential, drive disconnection and limited slip, so that the differential function is integrated, the space occupation is reduced, and the production cost is reduced.

[0014] In an exemplary embodiment, the housing is clearance-matched with the second half-shaft; and / or the input gear ring is clearance-matched with the first half-shaft. Specifically, the housing supports the second half-shaft and can have a relative speed with the second half-shaft, and the input gear ring supports the first half-shaft and can have a relative speed with the first half-shaft, thereby improving stability.

[0015] According to one aspect of an embodiment of the present application, a vehicle is disclosed, the vehicle comprising the above-mentioned differential.

[0016] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0017] The vehicle disclosed in the present application includes the above-mentioned differential, wherein the driving member is driven by a driving device to move axially along the shell, and when the driving member reaches the first preset position, the first half-shaft and the second half-shaft are fixedly connected to achieve a limited slip effect to ensure the power output of the wheels, and when the driving member reaches the second preset position, the first half-shaft and the second half-shaft are disconnected, and the first half-shaft and the second half-shaft are driven by the transmission device inside the shell to enable the first half-shaft and the second half-shaft to have a relative rotation speed to achieve differential rotation of the wheels, and when the driving member reaches the third preset position, the shell is disconnected from the input ring gear, and the first half-shaft connected to the first wheel and the second half-shaft connected to the second wheel continue to rotate to avoid power loss caused by the back-off of the drive unit corresponding to the input ring gear. The differential on the vehicle of the present application can realize the three functional modes of differential, drive disconnection, and limited slip through a driving device, so that the differential function is integrated, space occupancy is reduced, and production costs are reduced.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, are used to explain the principles of the present application.

[0020] Figure 1 A structural cross-sectional view of a differential provided in one embodiment of the present application;

[0021] Figure 2 for Figure 1 A partial enlarged view of area A in the middle;

[0022] Figure 3 A structural diagram of a reset device provided in another embodiment of the present application;

[0023] Figure 4 A layout diagram of a differential and a vehicle provided in accordance with an embodiment of the present application.

[0024] The following are the descriptions of the reference numerals:

[0025] 110-housing, 120-input ring gear, 130-first half shaft, 140-first driven member, 150-second driven member, 160-active member, 170-driving device, 180-resetting device, 211-first elastic member, 212-second elastic member, 213-stopper, 214-pressing block, 215-first annular plate, 216-second annular plate, 217-third annular plate, 221-electromagnetic coil, 222-push ring, 231-first gear, 232-second gear, 233-planetary gear set, 410-differential, 420-vehicle. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this application will be more comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0027] In the description of the utility model, all the connection relationships mentioned do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the utility model can be combined interchangeably without conflicting with each other.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number, and "above", "below", "within" etc. are understood to include the number.

[0031] Reference Figure 1The differential disclosed in the present application includes a housing 110, an input ring gear 120, a first half shaft 130, a second half shaft, a transmission device, a first driven member 140, a second driven member 150, a driving member 160 and a driving device 170. The first driven member 140 is arranged on the input ring gear 120 and can rotate synchronously with the input ring gear 120; the second driven member 150 is connected to the first half shaft 130 and can rotate synchronously with the first half shaft 130; the transmission device of this embodiment includes a planetary gear set 233, the planetary gear set 233 rotates synchronously with the housing 110, one end of the first half shaft 130 and one end of the second half shaft are both transmission-connected to the planetary gear set 233; the driving member 160 is arranged on the housing 110 and can rotate synchronously with the housing 110 rotates synchronously and can move axially relative to the shell 110. The axial movement of the active member 160 relative to the shell 110 has a first preset position, a second preset position and a third preset position. The active member 160 is configured as follows: when the active member 160 reaches the first preset position, the active member 160 is combined with the first follower 140 and the second follower 150; when the active member 160 reaches the second preset position, the active member 160 is combined with the first follower 140 and separated from the second follower 150; when the active member 160 reaches the third preset position, the active member 160 is separated from the first follower 140 and the second follower 150; the driving device 170 can drive the active member 160 to move axially relative to the shell 110.

[0032] Specifically, the input gear ring 120 is driven by an external driving force to rotate, and the first wheel and the second wheel of the two opposite vehicles 420 are synchronously connected to the first half shaft 130 and the second half shaft respectively, and the first half shaft 130 and the second half shaft are both drivingly connected to the planetary gear set 233. The first driven member 140 is arranged on the input gear ring 120, and the second driven member 150 is arranged on the first half shaft 130. The driving member 160 can rotate synchronously with the housing 110 and can move axially relative to the housing 110. The first driven member 140 rotates synchronously with the input gear ring 120, and the second driven member 150 rotates synchronously with the first half shaft. 130 rotates synchronously, and the driving member 160 is driven by the driving device 170 to move along the axial direction of the housing 110. When the driving member 160 reaches the first preset position, the driving member 160 combines with the first driven member 140 and the second driven member 150, so that the housing 110, the input ring gear 120 and the first half shaft 130 rotate synchronously, and the planetary gear set 233 inside the housing 110 transmits power to the second half shaft. The second half shaft is dragged by the planetary gear set 233 and rotates synchronously with the first half shaft 130. When one of the first wheel and the second wheel slips, the driving member 160 is simultaneously combined with the first driven member 140 and the second driven member 150. The first driven member 140 and the second driven member 150 are combined to limit the relative rotation of the first half shaft 130 and the second half shaft, so that the power can be output to the wheel on the other side with greater rolling resistance, thereby realizing the limited slip function and ensuring the power output and escape ability; when the active member 160 reaches the second preset position, the active member 160 is combined with the first driven member 140, the housing 110 and the input ring gear 120 rotate synchronously, and the active member 160 is separated from the second driven member 150, so that the synchronous rotation of the housing 110 and the first half shaft 130 is released. When there is a speed difference between the first half shaft 130 and the second half shaft, the planetary gear set 233 The housing 110 revolves and rotates on its own axis, and the housing 110, the first half-shaft 130 and the second half-shaft can rotate relative to each other to achieve a differential effect; when the active member 160 reaches the third preset position, the active member 160 is separated from the first driven member 140 and the second driven member 150, the housing 110 is disconnected from the input ring gear 120, and the first half-shaft 130 and the second half-shaft rotate under the inertia of the vehicle 420, so that the housing 110 also rotates synchronously, while the input ring gear 120 stops, thereby avoiding power loss caused by reverse drag of the drive unit corresponding to the input ring gear 120, and reducing power consumption under non-power requirements.

[0033] The differential disclosed in the present application drives the active member 160 to move axially along the housing 110 through a driving device 170, thereby realizing three modes: differential, drive disconnection and limited slip, so that the differential function is integrated, the space occupied is reduced, and the production cost is reduced.

[0034] Furthermore, the differential includes a second half-shaft and a transmission device, the first half-shaft 130 is rotatably connected to the input ring gear 120, the second half-shaft is rotatably connected to the housing 110, the transmission device includes a planetary gear set 233, a first gear 231 and a second gear 232, the planetary gear set 233 is synchronously connected to the housing 110, the first gear 231 is arranged at one end of the first half-shaft 130, the second gear 232 is arranged at one end of the second half-shaft, the first gear 231 and the second gear 232 are respectively meshed and transmitted to the planetary gear set 233, and the second driven member 150 is arranged on the first gear 231.

[0035] Specifically, the first half shaft 130 is rotationally connected to the input ring gear 120, and the second half shaft is rotationally connected to the housing 110, thereby improving the structural stability. The planetary gear set 233 rotates synchronously with the housing 110, and the first gear 231 and the second gear 232 are respectively meshed and transmitted to the planetary gear set 233. The active member 160, the housing 110 and the planetary gear set 233 rotate synchronously, and the active member 160 is driven by a driving device 170 to move axially along the housing 110, thereby realizing three functional modes: differential, drive disconnection and limited slip, so that the differential function is integrated, the space occupancy is reduced, and the production cost is reduced.

[0036] In some embodiments, the planetary gear set 233 may include a planetary gear shaft, two planetary gears rotatably connected to the planetary gear shaft, the planetary gear shaft rotates synchronously with the housing 110, the first gear 231 and the second gear 232 are both meshed with the two planetary gears, and when in the differential mode, the active member 160 enters the second preset position, the input ring gear 120 is combined with the housing 110, and the output is output by the planetary gear shaft, and the planetary gears revolve and rotate at the same time, thereby driving the first gear 231 and the second gear 232 to rotate and rotate differentially; when in the drive disconnection mode, the active member 160 enters the third preset position, the housing 110 and the input ring gear 1 20 is disconnected, the wheels are in a rotating state, and the first half-shaft 130 and the second half-shaft are rotated and output under the inertia of the vehicle 420, driving the planetary gear set 233 to rotate, and then driving the housing 110 to rotate; when in the limited slip mode, the active member 160 is combined with the first driven member 140 and the second driven member 150 at the same time, and the input ring gear 120, the housing 110, the first gear 231, the first half-shaft 130, the planetary gear shaft and the planetary gear all rotate synchronously, and the planetary gear set 233 transmits power to the second half-shaft, thereby dragging the second half-shaft to rotate, so that the first half-shaft 130 and the second half-shaft rotate synchronously, and a limited slip effect is achieved.

[0037] In fact, the input ring gear 120 is used for transmission connection with an external drive unit and can be driven by the drive unit to rotate. Optionally, the drive unit can be a motor, and the input ring gear 120 and the motor can be connected by gears and other structures. In addition, the transmission device in the differential can also be replaced by a planetary gear carrier or other transmission structures, as long as the transmission device can drive the first half shaft 130 and the second half shaft to rotate through the differential housing 110 rotation input.

[0038] Further, see Figure 2 The differential also includes a reset device 180, which cooperates with the active member 160. The reset device 180 is configured to provide a reset force to the active member 160, and the direction of the reset force is opposite to the direction in which the driving device 170 drives the active member 160 to move.

[0039] Specifically, the reset device 180 and the driving device 170 respectively provide opposite forces for the active member 160, so as to keep the active member 160 always against the driving device 170. At the same time, the reset force provided by the reset device 180 for the active member 160 can have a rigidity positioning effect on the driving of the driving device 170. When the driving device 170 is required to drive the active member 160 to switch back and forth between the first preset position, the second preset position and the third preset position, the driving force of the driving device 170 can be offset, thereby reducing the phenomenon that the driving device 170 drives the active member 160 to over-position, thereby improving the driving accuracy of the driving device 170. It should be noted that the reset device 180 can provide a pulling force or a pushing force for the active member 160 to move closer to or away from the input ring gear 120. When the reset device 180 exerts a pulling reset force on the active member 160, the reset device 180 and the driving device 170 are located on the same side relative to the active member 160. When the reset device 180 exerts a pushing reset force on the active member 160, the reset device 180 and the driving device 170 are located on opposite sides of the active member 160.

[0040] In this embodiment, in order to further improve the driving accuracy of the driving device 170 on the active member 160, the driving device 170 and the reset device 180 are arranged on opposite sides of the active member 160, and the reset device 180 includes a first reset group and a second reset group; the first reset group includes a plurality of first elastic members 211 arranged at intervals around the input ring gear 120, the first elastic members 211 are compressed and connected between the active member 160 and the input ring gear 120, and one end of the first elastic member 211 is slidably connected to one of the active member 160 and the input ring gear 120; the second reset group includes a plurality of second elastic members 212 arranged at intervals around the input ring gear 120, the first end of the second elastic member 212 is connected to one of the active member 160 and the input ring gear 120, and the second end of the second elastic member 212 is arranged at intervals from the other of the active member 160 and the input ring gear 120 and faces the other.

[0041] Specifically, the reset device 180 provides a thrust for the active member 160 to move away from the input gear ring 120, wherein the reset device 180 includes a first reset group and a second reset group, and a plurality of first elastic members 211 in the first reset group are arranged at intervals around the rotation axis of the input gear ring 120, and the first elastic member 211 is connected between the active member 160 and the input gear ring 120 in a compressed state, and can uniformly and continuously provide a reset force for the active member 160, so as to ensure that the active member 160 can be reset to a preset position away from the input gear ring 120 when the driving device 170 cancels the driving or reduces the driving force. , and any end of the first elastic member 211 is slidably connected to one of the active member 160 and the input ring gear 120, so that when the active member 160 is separated from the first driven member 140 on the input ring gear 120, the first elastic member 211 can always be connected between the active member 160 and the input ring gear 120, and when the active member 160 and the input ring gear 120 rotate relative to each other, the first elastic member 211 can slide relative to one of the active member 160 and the input ring gear 120 to prevent the first elastic member 211 from affecting the relative rotation between the active member 160 and the input ring gear 120. In the present embodiment, the input gear ring 120 and the active member 160 are both annular structures, and a plurality of first elastic members 211 are arranged in annular spacing around the annular structure of the input gear ring 120. The end of the first elastic member 211 facing away from the input gear ring 120 is slidably connected to the active member 160, and the sliding direction of the first elastic member 211 is annular and matches the annular structure of the active member 160. When the active member 160 and the input gear ring 120 rotate relative to each other, the ends of the plurality of first elastic members 211 connected to the active member 160 can slide in annular direction around the center line of the active member 160, and the plurality of second elastic members 212 are also arranged in annular spacing around the annular structure of the input gear ring 120. The distribution positions of the plurality of first elastic members 211 and the plurality of second elastic members 212 can evenly distribute the force on the active member 160, reduce the shaking between the active member 160 and the input gear ring 120, and further improve the movement accuracy of the active member 160. In fact, the first elastic member 211 can be slidably connected to the active member 160 through a slide rail or a slider, or through an annular bearing.

[0042] Furthermore, a plurality of second elastic members 212 in the second reset group are arranged at intervals around the rotation axis of the input gear ring 120. In this embodiment, a first end of the second elastic member 212 is connected to the input gear ring 120, and a second end is arranged at intervals with the active member 160 and faces the active member 160. Both the first reset group and the second reset group are located between the active member 160 and the input gear ring 120, and the first elastic member 211 is connected to the active member 160 and the input gear ring 120, and the second elastic member 212 is connected to one of the active member 160 and the input gear ring 120. When the active member 160 approaches the input gear ring 120 under the drive of the driving device 170, the differential enters a working mode, and the active member 160 is firstly subjected to the multiple first elastic members 211. The first reset group as a whole exhibits a first stiffness against the drive device 170. When the active member 160 is further close to the input ring gear 120 and the differential is switched to another working mode, the active member 160 can contact the uniform pressure of multiple second elastic members 212. The combination of the second reset group and the first reset group exhibits a second stiffness against the drive device 170, so that the active member 160 subjected to a relatively small thrust by the drive device 170 can stop moving under the resistance of the second reset group, and the drive device 170 needs to increase the thrust on the active member 160 to overcome the second stiffness and switch to another mode of the differential. The first reset group and the second reset group can improve the control accuracy of the displacement of the active member 160. With the cooperation of the first reset group and the second reset group, the active member 160 can be subjected to two stiffnesses exhibited by the reset device 180 in sequence when moving and switching the working mode of the differential, thereby reducing the control difficulty and improving the movement accuracy of the active member 160. In addition, the first elastic member 211 and the second elastic member 212 can be selected from a spring, an elastic rubber block, an elastic nylon block and other materials with resilience. In this embodiment, the first elastic member 211 and the second elastic member 212 are both springs.

[0043] In some other embodiments, the first end of the second elastic member 212 is connected to the active member 160, the second end of the second elastic member 212 is spaced apart from the input ring gear 120, and the second end faces the input ring gear 120, the active member 160 is synchronously connected to the second elastic member 212, and can drive multiple second elastic members 212 to move, when the driving device 170 drives the active member 160 to approach the input ring gear 120 and enter a preset position, the active member 160 is first pressed by multiple first elastic members 211, after the active member 160 further approaches the input ring gear 120 and reaches another preset position, the second end of the second elastic member 212 is pressed against the input ring gear 120, the active member 160 can be pressed by the second elastic member 212 under the premise of continuing to be pressed by the first elastic member 211, thereby improving the position control accuracy of the active member 160.

[0044] Furthermore, in this embodiment, a stopper 213 is provided on the input gear ring 120 , the first end of the second elastic member 212 is connected to the input gear ring 120 , the second end of the second elastic member 212 is compressed against the stopper 213 , and the active member 160 is opposite to the second end of the second elastic member 212 . Specifically, the second elastic member 212 is compressed and arranged between the stopper 213 and the input gear ring 120, so that the second elastic member 212 maintains a certain preload force, so that when the driving device 170 drives the active member 160 to move to contact the second reset group, it can offset the driving force of the driving device 170, and the preloaded second elastic member 212 can hinder the active member 160 from continuing to move, avoiding the situation where the driving device 170 pushes the active member 160 over the position, further improving the displacement control accuracy of the active member 160, and the stopper 213 can limit the compression length of the second elastic member 212, fix the second end of the second elastic member 212, not only reduce the vibration of the second elastic member 212, reduce the vibration of the differential as a whole, but also facilitate the meshing position of the corresponding active member 160 with the first follower 140 and the second follower 150, reducing the accuracy requirements of the product setting. In addition, in some embodiments, the second end of the second elastic member 212 can also be not connected to other parts, so that the second end of the second elastic member 212 is suspended in a free state.

[0045] In some embodiments, the rigidity of the first elastic member 211 is less than the rigidity of the second elastic member 212. Specifically, the second elastic member 212 has a higher rigidity, which can offset more driving force of the driving device 170, so that when the driving device 170 drives the active member 160 to move to the corresponding first preset position, the second preset position and the third preset position, significantly different driving forces are required, respectively, and the active member 160 can be driven to accurately enter the corresponding preset position, further improving the displacement control accuracy of the active member 160. In addition, the rigidity of the first elastic member 211 and the second elastic member 212 can also be the same, or the rigidity of the first elastic member 211 is higher than that of the second elastic member 212.

[0046] In this embodiment, a pressing block 214 is provided on the active member 160, and the pressing block 214 faces the second elastic member 212. Specifically, the pressing block 214 is extended from the active member 160, and the active member 160 needs to move a certain distance close to the driving ring gear, and can be pressed against the second elastic member 212 through the pressing block 214. The pressing block 214 is extended toward the second elastic member 212, which reduces the travel distance of the active member 160, further improves the space utilization rate, and reduces the space occupied inside the differential. In this embodiment, the second elastic member 212 is farther away from the active member 160 than the first elastic member 211, wherein the second end of the second elastic member 212 facing away from the input ring gear 120 is spaced from the active member 160, and specifically, the second end of the second elastic member 212 is spaced from the pressing block 214, so that the active member 160 can press against the second elastic member 212 after compressing the first elastic member 211 to a certain distance.

[0047] Furthermore, in this embodiment, the reset device 180 includes a first annular plate 215 and a second annular plate 216, the first annular plate 215 is arranged on the input ring gear 120, the second annular plate 216 is bearing-connected to the active member 160, and a plurality of first elastic members 211 are connected between the first annular plate 215 and the second annular plate 216 at intervals.

[0048] Specifically, the first annular plate 215 can rotate synchronously with the input ring gear 120, and a plurality of first elastic members 211 are connected between the first annular plate 215 and the second annular plate 216. The second annular plate 216 is connected to the driving member 160 by a bearing, so that after the driving member 160 is disconnected from the first driven member 140, that is, the driving member 160 is located in the third preset position, the housing 110 disconnects the driving effect of the input ring gear 120, and the first annular plate 215, the second annular plate 216 and the plurality of first elastic members 211 can still rotate relative to the driving member 160 at the same time, so that the housing 110, the first half shaft 130 and the second half shaft can still rotate smoothly, reducing friction and further reducing losses. In fact, the rotation axis of the first annular plate 215, the axis of the second annular plate 216 and the axis of the input ring gear 120 coincide with each other, and the first annular plate 215 is rotatably connected to the driving member 160 through an annular bearing.

[0049] Combination Figure 1 and Figure 2In this embodiment, the first reset group and the second reset group are arranged in inner and outer circles. Specifically, the plurality of first elastic members 211 are arranged in a ring shape around the axis of the input gear ring 120 at intervals, and the plurality of second elastic members 212 are arranged in a ring shape around the inner circumference or outer circumference of the plurality of first elastic members 211 at intervals. When the active member 160 moves and switches the working mode, it can be sequentially subjected to the two-stage stiffness exhibited by the reset device 180, which reduces the control difficulty, improves the movement accuracy of the active member 160, and facilitates the installation layout of the first elastic member 211 and the second elastic member 212.

[0050] In a specific embodiment, Figure 1 and Figure 2 As shown, the input gear ring 120 is rotatably connected to the first semi-shaft 130, the rotation axis of the input gear ring 120 and the center line of the first semi-shaft 130 coincide with each other, and the spacing between the second elastic member 212 and the first semi-shaft 130 is greater than the spacing between the first elastic member 211 and the first semi-shaft 130, that is, a plurality of second elastic members 212 are spaced around the outer circumference of a plurality of first elastic members 211 and arranged in an annular manner, which facilitates the installation layout of the first elastic members 211 and the second elastic members 212. In fact, the number and position of the first elastic members 211 and the second elastic members 212 can be set one-to-one, or staggered, or randomly and non-correspondingly in terms of number and position.

[0051] And, if Figure 2 As shown, the reset device 180 also includes a third annular plate 217, the axis of the third annular plate 217 coincides with the axis of the input gear ring 120, the third annular plate 217 is located at the outer periphery of the second annular plate 216, the first end of the second elastic member 212 is connected to the first annular plate 215, the second end of the second elastic member 212 is connected to the third annular plate 217, and the third annular plate 217 is against the stopper 213, so that the second elastic member 212 is pre-tightened in advance, so that the active member 160 can achieve stiffness positioning under the pre-tightening force of the second elastic member 212, and there is no need to accurately design the length of the second elastic member 212 in advance, which reduces the installation accuracy. The multiple first elastic members 211 and the multiple second elastic members 212 are arranged in an annular shape with inner and outer circles, which facilitates the installation layout of the first elastic member 211 and the second elastic member 212, and can also facilitate the stopper 213 to act on the second elastic member 212, reducing the design difficulty. In addition, the multiple first elastic members 211 can also be surrounded by the outer periphery of the multiple second elastic members 212.

[0052] Reference Figure 3 The first elastic member 211 and the second elastic member 212 are alternately arranged along the circumferential direction.

[0053] Specifically, the first elastic members 211 and the second elastic members 212 are alternately arranged one by one and arranged circumferentially around the axis of the input gear ring 120 , thereby reducing space occupancy and achieving more uniform force.

[0054] In a specific embodiment, the reset device 180 includes a first annular plate 215 and a second annular plate 216, the first annular plate 215 is arranged on the input ring gear 120, the second annular plate 216 is bearing-connected to the active member 160, the first elastic member 211 is compression-connected between the first annular plate 215 and the second annular plate 216, one end of the second elastic member 212 is connected to the first annular plate 215, and the other end is spaced apart from the second annular plate 216, and the second elastic member 212 is shorter than the first elastic member 211 and is in a free state.

[0055] Further, in this embodiment, the first preset position, the second preset position and the third preset position are sequentially distributed in a direction away from the input ring gear 120 .

[0056] Specifically, the drive device 170 can drive the active member 160 to pass through the first preset position, the second preset position and the third preset position in sequence and return in sequence, so that the differential can choose to enter the three modes of drive disconnection, differential, and limited slip, so that the differential function is integrated, the space occupancy is reduced, and the production cost is reduced.

[0057] In addition, the second preset position is located between the first preset position and the third preset position, the reset device 180 connects the active member 160 and the input ring gear 120, and the drive device 170 is located on the side of the active member 160 away from the input ring gear 120, so that the drive device 170 is disconnected or is under a small driving force. The active member 160 enters the third preset position or the second preset position under the drive of the reset device 180, and the differential can be controlled to enter the drive disconnection mode or the corresponding differential mode to reduce energy consumption. Only when the vehicle 420 enters a specific road surface and needs limited slip, the driving force of the drive device 170 needs to be increased, and the second stiffness of the reset device 180 can be overcome, so that the active member 160, the first driven member 140 and the second driven member 150 are combined. In addition, the limited slip mode needs to be established under the support of the differential mode, and the corresponding first driven member 140 and the active member 160 The depth of combination needs to be greater than the depth of combination of the second driven member 150 and the active member 160 to ensure torque transmission.

[0058] In some other embodiments, the relative positions among the first preset position, the second preset position and the third preset position may also be changed by adjusting the position and the engagement depth of the first follower 140 and the second follower 150, as well as adjusting the structure of the input ring gear 120. For example, the first preset position, the third preset position and the second preset position are sequentially distributed in a direction away from the input ring gear 120, or the second preset position, the third preset position and the first preset position are sequentially distributed in a direction away from the input ring gear 120. This embodiment does not limit the specific positions of the first preset position, the second preset position and the third preset position.

[0059] Furthermore, the active member 160 and the first driven member 140 are connected by tooth surfaces. Specifically, the end surfaces of the active member 160 and the first driven member 140 facing each other are provided with tooth surfaces, and the active member 160 moving axially along the housing 110 can mesh with the first driven member 140, thereby increasing the contact area and reducing slippage.

[0060] Furthermore, the active member 160 and the second driven member 150 are connected by tooth surfaces. Specifically, the end surfaces of the active member 160 and the second driven member 150 facing each other are provided with tooth surfaces, and the active member 160 moving axially along the housing 110 can mesh with the second driven member 150, thereby increasing the contact area and reducing slippage.

[0061] Combination Figure 2 In some specific embodiments, the active member 160 is provided with a first tooth surface and a second tooth surface on the end surface facing the input ring gear 120, the first driven member 140 is arranged on the input ring gear 120, the first driven member 140 is provided with a third tooth surface, the second driven member 150 is arranged on the first gear 231, the first gear 231 is located between the input ring gear 120 and the active member 160, the first gear 231 rotates synchronously with the first half shaft 130, the second driven member 150 is provided with a fourth tooth surface, when the active member 160 reaches the second preset position, the first tooth surface and the third tooth surface are meshed with each other, when the active member 160 reaches the first preset position, the first tooth surface and the third tooth surface are always in a meshing state, and the second tooth surface and the fourth tooth surface are meshed with each other. Moreover, the first tooth surface, the second tooth surface, the third tooth surface and the fourth tooth surface are all in the shape of annular tooth surfaces, which increases the meshing area and ensures torque transmission, wherein the second tooth surface is arranged around the outer ring of the first tooth surface to facilitate layout, so that the second tooth surface can mesh with the first gear 231, and the meshing depth between the first tooth surface and the third tooth surface is greater than the meshing depth between the second tooth surface and the fourth tooth surface. The first tooth surface is closer to the input ring gear 120 than the second tooth surface, so that the limited slip mode of the differential can be based on the support of the differential mode.

[0062] In addition, the housing may be a cast aluminum housing 110 , the active component 160 is sleeved on the outer periphery of the housing 110 , and the active component 160 and the housing 110 may be connected via a spline.

[0063] In this embodiment, the driving device 170 includes an electromagnetic coil 221 and a push ring 222. The push ring 222 is against the active member 160. The electromagnetic coil 221 is configured to control the push ring 222 to move back and forth along the axial direction of the housing 110, thereby pushing the active member 160 to select one of the first preset position, the second preset position, or the third preset position. Specifically, by energizing or de-energizing the electromagnetic coil 221, and changing the magnitude of the energization of the electromagnetic coil 221, the push ring 222 is axially moved under the electromagnetic action, thereby driving the active member 160 to move along the axial direction of the input gear ring 120, so that the three functional modes of differential, drive disconnection, and limited slip can be realized, so that the differential function is integrated, the space occupation is reduced, and the production cost is reduced. In fact, the axis of the push ring 222 coincides with the axis of the housing 110, and the push ring 222 is connected to the active member 160 through a bearing to reduce sliding friction. In addition, the push ring 222 can also be against the active member 160, which has a simple structure. In addition, the driving device 170 can be a driving structure such as a motor or a cylinder.

[0064] In this embodiment, the driving device 170 includes an electromagnetic coil 221 and a push ring 222. The electromagnetic coil 221 is configured to control the push ring 222 to move back and forth along the axial direction of the housing 110, thereby pushing the active member 160 to select a first preset position, a second preset position or a third preset position. The first preset position, the second preset position and the third preset position are sequentially distributed in a direction away from the input ring gear 120. The differential includes a reset device 180, a second half shaft and a transmission device. The reset device 180 cooperates with the active member 160. The reset device 180 is configured to provide a reset force to the active member 160. The direction of the reset force is the same as that of the driving member 160. The driving device 170 drives the active member 160 to move in the opposite direction. The first half shaft 130 is rotationally connected to the input ring gear 120, and the second half shaft is rotationally connected to the housing 110. The transmission device includes planetary gears, planetary gear shafts, first gears 231 and second gears 232. The planetary gear shafts are synchronously connected to the housing 110, and the planetary gears rotate synchronously with the planetary gear shafts. The first gear 231 is arranged at one end of the first half shaft 130, and the second gear 232 is arranged at one end of the second half shaft. The first gear 231 and the second gear 232 are respectively meshed and transmitted to the planetary gears, and the second driven member 150 is arranged on the first gear 231.

[0065] In the drive disconnection mode, the electromagnetic coil 221 is powered off, the push ring 222 cancels the thrust on the active member 160, and the reset device 180 resets the active member 160 to the third preset position, and the housing 110 is disconnected from the input gear ring 120, so that the transmission between the housing 110 and the input gear ring 120 is canceled. At this time, the wheel is in a rotating state, and the first half shaft 130 and the second half shaft rotate and output under the inertia of the vehicle 420, thereby driving the housing 110 to rotate, avoiding the external drive unit from driving the input gear ring 120 and reversely dragging the housing 110 to cause power loss; in the differential mode, the electromagnetic coil 221 is energized to maintain a small current, and the push ring 222 offsets the first stiffness of the reset device 180, so that the active member 160 enters the second preset position and combines with the first slave position. The input ring gear 120 is combined with the housing 110 and drives the housing 110 to rotate, and is output by the planetary gear shaft. At the same time, the planetary gear revolves and rotates, thereby driving the first gear 231 and the second gear 232 to rotate and rotate differentially; in the limited slip mode, the current passed through the electromagnetic coil 221 increases, so that it overcomes the second stiffness of the reset device 180, and then the active member 160 is combined with the first driven member 140 and the second driven member 150 at the same time, and the input ring gear 120, the housing 110, the first gear 231, the first half shaft 130, the planetary gear shaft and the planetary gear all rotate synchronously, and the power is transmitted to the second half shaft through the meshing of the planetary gear and the second gear 232, thereby dragging the second half shaft to rotate, so as to realize the synchronous rotation of the first half shaft 130 and the second half shaft.

[0066] Furthermore, the housing 110 is clearance-matched with the second half-shaft, and the input ring gear 120 is clearance-matched with the first half-shaft 130. Specifically, the housing 110 supports the second half-shaft and can have a relative speed with the second half-shaft, and the input ring gear 120 supports the first half-shaft 130 and can have a relative speed with the first half-shaft 130, thereby improving stability. In addition, bearings can also be matched between the housing 110 and the second half-shaft, and between the input ring gear 120 and the first half-shaft 130.

[0067] Reference Figure 4 The present application also discloses a vehicle 420 , which includes the above-mentioned differential 410 .

[0068] Specifically, the vehicle 420 further includes a first wheel and a second wheel, the first wheel is synchronously connected to the first half-shaft 130, and the second wheel is synchronously connected to the second half-shaft, and the driving device 170 drives the active member 160 to move axially along the housing 110. When the active member 160 reaches the first preset position, the first half-shaft 130 and the second half-shaft are fixedly connected to achieve a limited slip effect, thereby ensuring the power output of the first wheel and the second wheel. When the active member 160 reaches the second preset position, the first half-shaft 130 and the second half-shaft are disconnected, and the first half-shaft 130 is driven by the transmission device inside the housing 110 to move axially along the housing 110. And the second half-shaft can have a relative rotation speed to realize differential rotation of the first wheel and the second wheel. When the active member 160 reaches the third preset position, the housing 110 is disconnected from the input ring gear 120, and the first half-shaft 130 connected to the first wheel and the second half-shaft connected to the second wheel continue to rotate to avoid power loss caused by the back-off of the drive unit corresponding to the input ring gear 120. The differential 410 on the vehicle 420 of the present application can realize the three functional modes of differential, drive disconnection, and limited slip through a drive device 170, so that the functions of the differential 410 are integrated, space occupancy is reduced, and production costs are reduced.

[0069] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A differential, characterized in that: include: Housing, input ring gear, first half shaft; A first driven member, disposed on the input gear ring, capable of rotating synchronously with the input gear ring; a second driven member connected to the first half shaft and capable of rotating synchronously with the first half shaft; The active member is arranged on the housing, can rotate synchronously with the housing, and can move axially relative to the housing. The active member has a first preset position, a second preset position, and a third preset position relative to the axial movement of the housing. The active member is configured as follows: When the active member reaches the first preset position, the active member is combined with the first driven member and the second driven member. When the active member reaches the second preset position, the active member is combined with the first driven member and separated from the second driven member. When the active member reaches the third preset position, the active member is separated from the first driven member and the second driven member; The driving device can drive the active member to move axially relative to the housing.

2. The differential according to claim 1, characterized in that: The differential further comprises a reset device, which cooperates with the active member and is configured to provide a reset force to the active member, wherein the direction of the reset force is opposite to the direction in which the driving device drives the active member to move.

3. The differential according to claim 2, characterized in that: The driving device and the resetting device are arranged on opposite sides of the active member, and the resetting device includes a first resetting group and a second resetting group; The first reset group includes a plurality of first elastic members spaced around the input gear ring, the first elastic member is compressed and connected between the active member and the input gear ring, and one end of the first elastic member is slidably connected to one of the active member and the input gear ring; The second reset group includes a plurality of second elastic members spaced apart around the input gear ring, wherein a first end of the second elastic member is connected to one of the active member and the input gear ring, and a second end of the second elastic member is spaced apart from and faces the other of the active member and the input gear ring.

4. The differential according to claim 3, characterized in that: The input gear ring is provided with a stopper, the first end of the second elastic member is connected to the input gear ring, the second end of the second elastic member is compressed against the stopper, and the active member is opposite to the second end of the second elastic member; and / or The stiffness of the first elastic member is smaller than the stiffness of the second elastic member; and / or A pressing block is disposed on the active member, and the pressing block faces the second elastic member; and / or The reset device comprises a first annular plate and a second annular plate, wherein the first annular plate is arranged on the input gear ring, the second annular plate is bearing-connected to the active member, and a plurality of the first elastic members are connected between the first annular plate and the second annular plate at intervals.

5. The differential according to claim 3 or 4, characterized in that: The first reset group and the second reset group are arranged in inner and outer circles; and / or The first elastic members and the second elastic members are alternately arranged along the circumferential direction.

6. The differential according to claim 1 or 2, characterized in that: The first preset position, the second preset position and the third preset position are sequentially distributed in a direction away from the input gear ring; and / or The active member and the first driven member are connected via tooth surfaces; and / or The active member and the second driven member are connected via tooth surfaces.

7. The differential according to claim 1 or 2, characterized in that: The driving device includes an electromagnetic coil and a push ring, the push ring is against the active member, and the electromagnetic coil is configured to control the push ring to move back and forth along the axial direction of the shell, thereby pushing the active member to selectively reach the first preset position, the second preset position or the third preset position.

8. The differential according to claim 1 or 2, characterized in that: The differential also includes a second half-shaft and a transmission device, the first half-shaft is rotatably connected to the input ring gear, the second half-shaft is rotatably connected to the housing, the transmission device includes a planetary gear set, a first gear and a second gear, the planetary gear set is synchronously connected to the housing, the first gear is arranged at one end of the first half-shaft, the second gear is arranged at one end of the second half-shaft, the first gear and the second gear are respectively meshed and transmitted to the planetary gear set, and the second driven member is arranged on the first gear.

9. The differential according to claim 8, characterized in that: The housing is clearance-matched with the second half-shaft; and / or The input ring gear is clearance-fitted with the first half-shaft.

10. A vehicle, characterized in that: The vehicle comprises a differential as claimed in any one of claims 1 to 9.

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