Differential mechanism, power assembly and vehicle

Abstract

The invention discloses a differential mechanism, a power assembly and a vehicle. The differential mechanism comprises a differential assembly and a locking assembly. The differential assembly comprises a shell, a planet unit is arranged in the shell and comprises a planet carrier and a planet wheel, the planet wheel is rotationally connected to the planet carrier, the locking assembly comprises an electromagnetic unit and a locking unit, and under the condition that the electromagnetic unit is powered on, the locking unit is rotationally connected to the planet carrier in the radial direction of the planet unit. The electromagnetic unit can drive the locking unit to move in the direction close to the center of the planet unit and is meshed with the planet wheel so as to limit the planet wheel from rotating around the planet carrier. And under the condition that the electromagnetic unit is powered off, the locking unit is separated from the planet wheel, and the planet wheel can rotate around the planet carrier.

Description

Technical Field

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

[0002] During vehicle driving, the differential is used to adjust the rotation speed of the left and right wheels so that the two sides of the vehicle can rotate at different speeds. In the case of wheel slippage, the differential function needs to be turned off so that the left and right wheels rotate at the same speed. However, the current device for turning off the differential function takes up a lot of space, which is not conducive to integration inside the vehicle. Summary of the invention

[0003] The present application provides a differential, a powertrain and a vehicle.

[0004] In a first aspect, the differential provided by the present application includes a differential assembly and a locking assembly. The differential assembly includes a housing, a planetary unit is arranged in the housing, the planetary unit includes a planetary carrier and a planetary wheel, the planetary wheel is rotatably connected to the planetary carrier, and the locking assembly includes an electromagnetic unit and a locking unit. When the electromagnetic unit is powered on, in the radial direction of the planetary unit, the electromagnetic unit can drive the locking unit to move toward the center of the planetary unit and mesh with the planetary wheel to limit the planetary wheel from rotating around the planetary carrier; when the electromagnetic unit is powered off, the locking unit is separated from the planetary wheel, and the planetary wheel can rotate around the planetary carrier.

[0005] In some embodiments, the planetary carrier includes a sliding tooth portion and a wheel shaft portion, the wheel shaft portion includes a first end and a second end opposite to each other, the sliding tooth portion is connected to the first end, and the planetary wheel is rotatably connected to the second end; the sliding tooth portion is provided with a through hole, and at least a portion of the locking unit can extend into the through hole.

[0006] In some embodiments, the through hole is non-circular.

[0007] In some embodiments, the locking unit includes a locking member and an elastic member, one end of the elastic member abuts against the wheel shaft portion, and the other end of the elastic member abuts against the locking unit. When the electromagnetic unit is energized, the elastic member is compressed, and when the electromagnetic unit is de-energized, the elastic member is reset to push the locking unit to separate from the planetary gear, and at least partially withdraw the locking unit from the through hole.

[0008] In some embodiments, the locking member includes a locking portion and a connecting portion, and the locking portion and the connecting portion are connected. The locking portion is engaged with the planetary gear to limit the planetary gear from rotating around the planetary carrier; and the connecting portion can move in and out of the through hole.

[0009] In some embodiments, the locking assembly also includes a moving unit, which is arranged between the electromagnetic unit and the locking unit. The shell is provided with a mounting hole, and the moving unit can move in the mounting hole. The moving unit is connected to the planetary unit. When the electromagnetic unit is energized, the electromagnetic unit drives the moving unit to move in a first direction close to the locking unit in the axial direction of the planetary unit, so as to push the locking unit to move in a second direction close to the center of the planetary unit in the radial direction of the planetary unit.

[0010] In some embodiments, the moving unit is provided with a first guiding bevel, and the locking unit is provided with a second guiding bevel, and the first guiding bevel and the second guiding bevel are connected and can slide relative to each other to push the locking unit to move in the radial direction of the planetary unit.

[0011] In some embodiments, the locking assembly further includes a rotating unit, and the rotating unit is connected to the moving unit. When the electromagnetic unit is powered off, the housing rotates around the axis of the planetary unit and drives the rotating unit, the moving unit and the locking unit to rotate synchronously; when the electromagnetic unit is powered on, the electromagnetic unit absorbs the rotating unit to limit the rotation of the rotating unit, and the rotating unit pushes the moving unit to move in a first direction close to the locking unit.

[0012] In some embodiments, the rotating unit is provided with a sliding track, the mobile unit is at least partially accommodated in the sliding track and can slide in the track, the sliding track includes a first position and a second position, the second position is closer to the planetary unit in the axial direction of the planetary unit than the first position. When the electromagnetic unit is powered off, the mobile unit is located at the first position and rotates synchronously with the rotating unit; when the electromagnetic unit is powered on, the rotating unit stops rotating, and the rotating unit pushes the mobile unit to move from the first position to the second position.

[0013] In some embodiments, the movable unit includes a first movable member and a second movable member, one end of the first movable member is connected to the sliding track, the other end of the first movable member is connected to one end of the second movable member, the other end of the second movable member is connected to the locking unit, and the radial dimension of the first movable member is smaller than the radial dimension of the second movable member.

[0014] In a second aspect, the present application provides a powertrain. The powertrain includes a reducer. The reducer includes the differential described in any one of the above embodiments.

[0015] In a third aspect, the present application provides a vehicle, the vehicle comprising the powertrain described in any one of the above-mentioned embodiments.

[0016] In the differential, powertrain and vehicle of the present application, when the electromagnetic unit is energized, the electromagnetic unit drives the locking unit to move radially of the planetary unit and mesh with the planetary gear, so that the planetary gear cannot rotate relative to the planetary carrier. In the case of vehicle slippage and the synchronous rotation of the half-shaft gears is required, the two half-shaft gears can rotate at the same speed. Furthermore, the radial movement of the locking unit does not occupy the axial space of the planetary unit, making the differential structure more compact. In addition, the planetary gear is located inside the housing, and the space for the radial movement of the locking unit is the space inside the housing itself for accommodating the planetary gears, that is, the locking unit does not increase the volume of the differential, which is conducive to the compact structure of the differential and the control of the size of the differential.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 is a three-dimensional schematic diagram of a differential in some embodiments of the present application;

[0020] Figure 2 yes Figure 1 The cross-sectional schematic diagram of the differential shown is when the electromagnetic unit is de-energized;

[0021] Figure 3 yes Figure 1 The cross-sectional schematic diagram of the differential shown is when the electromagnetic unit is energized;

[0022] Figure 4 yes Figure 1 A three-dimensional schematic diagram of a partial structure of a differential shown;

[0023] Figure 5 yes Figure 1 A three-dimensional schematic diagram of a partial structure of a differential shown;

[0024] Figure 6 yes Figure 1 A three-dimensional schematic diagram of a partial structure of a differential shown;

[0025] Figure 7 It is a three-dimensional schematic diagram of a vehicle according to some embodiments of the present application.

[0026] Description of main component numbers:

[0027] Vehicle 10000; reducer 1000; differential 100; differential assembly 10; housing 11; mounting hole 111; planetary unit 13; planet carrier 131; sliding tooth portion 1311; through hole 13111; axle portion 1313; first end 13131; second end 13132; planetary gear 133; first planetary gear 1331; second planetary gear 1332; side gear 15; first side gear 151; second side gear 152; large gear 17; locking assembly 30; electromagnetic unit 31; locking unit 33; locking member 331; locking portion 3311; connecting portion 3312; second guide slope 3313; elastic member 333; moving unit 35; first moving member 351; second moving member 352; first guide slope 3521; rotating unit 37; sliding track 371; first position 3711; second position 3712. DETAILED DESCRIPTION

[0028] In the description of the present application, some of the disclosed contents have been shown in the accompanying drawings accordingly, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The contents described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, many different contents or examples are disclosed to realize different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present application, it should be understood that the terms used to indicate orientation or positional relationships (such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc.) are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and facilitating the understanding of the corresponding embodiments, 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. Therefore, the terms used to indicate orientation or positional relationships cannot be understood as limitations on the present application.

[0032] In the description of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this application, 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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] See also Figures 1 to 4 The differential 100 provided in the present application includes a differential assembly 10 and a locking assembly 30. The differential assembly 10 includes a housing 11, a planetary unit 13 is arranged in the housing 11, the planetary unit 13 includes a planetary carrier 131 and a planetary wheel 133, the planetary wheel 133 is rotatably connected to the planetary carrier 131, and the locking assembly 30 includes an electromagnetic unit 31 and a locking unit 33. When the electromagnetic unit 31 is powered on, in the radial direction of the planetary unit 13, the electromagnetic unit 31 can drive the locking unit 33 to move toward the center of the planetary unit 13 and mesh with the planetary wheel 133 to limit the planetary wheel 133 from rotating around the planetary carrier 131; when the electromagnetic unit 31 is powered off, the locking unit 33 is separated from the planetary wheel 133, and the planetary wheel 133 can rotate around the planetary carrier 131.

[0035] Specifically, the differential assembly 10 is used to achieve synchronous rotation of the wheels on both sides of the vehicle 10000 when the vehicle 10000 is traveling in a straight line, and allows the wheels on both sides to rotate at different speeds when turning, thereby ensuring the driving stability and controllability of the vehicle 10000. The differential assembly 10 mainly includes a housing 11, a planet carrier 131, planetary gears 133, axle gears 15, and a large gear 17.

[0036] During normal straight-line driving, the power is first transmitted from the drive shaft to the large gear 17. The large gear 17 is fixedly connected to the housing 11. When the drive shaft rotates, the force directly drives the housing 11 as a whole to rotate around the axis X of the planetary unit 13 through the large gear 17. A planet carrier 131 is fixedly installed in the housing 11, and the planetary gear 133 is rotatably connected to the planet carrier 131. The planetary gear 133 can rotate freely around its planet carrier 131, and the rotation axis is the axis of the planetary gear 133 itself. For example, the first planetary gear 1331 in the figure can rotate around its own axis V1 (i.e., the rotation of the planetary gear 133), and the second planetary gear 1332 can rotate around its own axis V2 (i.e., the rotation of the planetary gear 133). The planetary gear 133 may be one or more. In the present application, the planetary gear 133 includes four planetary gears 133, which are connected to two side gears 15 (the first side gear 151 and the second side gear 152) through gear meshing. The meshing area of ​​the four planetary gears 133 and the side gears 15 is larger, which can improve the stability of the connection between the planetary gears 133 and the side gears 15. The four planetary gears 133 are evenly arranged in the circumferential direction of the planet carrier 131, which is conducive to a more uniform distribution of the force between the planetary gears 133 and the planet carrier 131 during the rotation of the differential assembly 10, thereby improving the stability of the rotation of the differential assembly 10. Furthermore, the four planetary gears 133 are symmetrically arranged in the circumferential direction of the planet carrier 131.

[0037] The first half-axle gear 151 and the second half-axle gear 152 are respectively connected to the wheels on both sides of the vehicle 10000. For example, the first half-axle gear 151 corresponds to the left rear wheel of the vehicle 10000, and the second half-axle gear 152 corresponds to the right rear wheel of the vehicle 10000. When the wheels on both sides of the vehicle 10000 are driving on a flat road, the resistances on the wheels on both sides are basically the same, so the planetary gear 133 will not rotate around its own axis, but will evenly transmit power to the first half-axle gear 151 and the second half-axle gear 152 through the planetary carrier 131, thereby driving the wheels on both sides to achieve synchronous rotation. In this state, the planetary carrier 131 only plays the role of transmitting power without changing the rotation speed of the half-axle gears 15 on both sides.

[0038] When the vehicle 10000 turns, since the inner wheel has a shorter driving track and the outer wheel has a longer driving track, the rotation speeds of the wheels on both sides need to be different. At this time, the power is still transmitted to the large gear 17 through the drive shaft to drive the housing 11 to rotate. However, since the resistances to the wheels on both sides are different when the vehicle 10000 turns, the planetary gear 133 inside the housing 11 rotates around the planetary carrier 131 around its own axis, and the rotation of the planetary gear 133 enables the first half-axle gear 151 and the second half-axle gear 152 to rotate at different speeds, thereby realizing the differential function. That is, through the rotation of the planetary gear 133 in the planetary unit 13 around its own axis, the differential 100 can adjust the half-axle gear 15 according to the turning requirements of the vehicle 10000, thereby ensuring the normal driving and stability of the vehicle 10000 and significantly reducing the wear between the wheels and the ground.

[0039] However, when one wheel of the vehicle 10000 slips, there will be a speed difference between the wheel and the wheel on the other side of the vehicle 10000, so there will be a speed difference between the first half-axle gear 151 and the second half-axle gear 152. Since the wheel on the other side will be subject to ground resistance, the power of the vehicle 10000 is all transferred to the slipping wheel when passing through the differential 100, and is not transferred to the wheel on the other side that needs power. Therefore, the differential function of the differential 100 needs to be turned off, that is, the first half-axle gear 151 and the second half-axle gear 152 need to rotate synchronously, so as to drive the wheels on both sides to rotate at the same speed. At this time, the power of the vehicle 10000 is all transferred to the wheel on the other side that needs power, thereby helping the vehicle 10000 to get out of trouble.

[0040] Based on this, the locking unit 33 of the present application is used to limit the rotation of the planetary gear 133 around the planetary carrier 131, so that the first side shaft gear 151 and the second side shaft gear 152 can rotate synchronously.

[0041] Specifically, the locking assembly 30 includes an electromagnetic unit 31 and a locking unit 33. The electromagnetic unit 31 is located outside the housing 11 and is fixedly connected to the housing 11 of the reducer 1000. Further, the electromagnetic unit 31 of the present application is a coil. The electromagnetic unit 31 achieves locking and unlocking of the locking unit 33 by controlling the power-on or power-off state. The electromagnetic unit 31 can be one or more. In the present application, the electromagnetic unit 31 is one and is located on the side where the first half-shaft gear 151 is located. In other embodiments of the present application, the electromagnetic unit 31 can be more than one.

[0042] The locking assembly 30 is used to engage and disengage with the planetary gear 133. One locking assembly 30 can at least limit the rotation of one planetary gear 133 around its own axis. In the present application, one locking assembly 30 can limit the rotation of two planetary gears 133 around their own axis. The locking assembly 30 can be one or more. In the present application, there are four locking assemblies 30. The four locking assemblies 30 are arranged at intervals with the four planetary gears 133, so that the area of ​​engagement between the locking assembly 30 and the planetary gear 133 is larger and the locking effect is better. The locking assembly 30 can limit the locking of its two adjacent planetary gears 133.

[0043] When the electromagnetic unit 31 is powered, the electromagnetic unit 31 drives the locking unit 33 to move along the radial direction of the planetary unit 13 toward the center (i.e., the first direction A in the figure) until it meshes with the planetary gear 133. At this time, the planetary gear 133 cannot rotate relative to the planetary carrier 131 due to the restriction of the locking unit 33, so that the differential 100 loses the differential function. All the planetary gears 133 inside the differential 100 are connected as a whole by the locking unit 33, and the side gears 15 cannot rotate relative to the planetary gears 133. The rotation of the housing 11 drives the planetary carrier 131 to rotate, and the planetary gears 133 revolve together with the differential 100 on the planetary carrier 131. The revolution means that the planetary gears 133 and the planetary carrier 131 are as a whole, and there is no relative movement between each other, and they rotate around the axis X of the planetary unit 13, so that the two side gears 15 rotate at the same speed, so that the power can be evenly distributed to the wheels on both sides connected to the two side gears 15. When the wheel on one side of the vehicle 10000 slips, the power is no longer concentrated on the slipping wheel, but is distributed to the wheel on the other side with grip through a rigid connection, so that the vehicle 10000 can get out of trouble and resume normal driving. When the electromagnetic unit 31 is powered off, the locking unit 33 is separated from the planetary gear 133, and the separation direction is the second direction B in the figure. The planetary gear 133 can rotate freely around its own axis and realize the differential function of the differential 100 through the two half-shaft gears 15 meshing therewith.

[0044] When the electromagnetic unit 31 of the differential 100 of the present application is powered on, the electromagnetic unit 31 drives the locking unit 33 to move radially of the planetary unit 13 and mesh with the planetary gear 133, so that the planetary gear 133 cannot rotate relative to the planetary carrier 131. When the vehicle 10000 slips and the half-shaft gears 15 need to rotate synchronously, the two half-shaft gears 15 can rotate at the same speed. Furthermore, the radial movement of the locking unit 33 does not occupy the axial space of the planetary unit 13, making the structure of the differential 100 more compact. In addition, the planetary gear 133 is located inside the housing 11, and the space for the radial movement of the locking unit 33 is the space inside the housing 11 itself for accommodating the planetary gears, that is, the locking unit 33 does not increase the volume of the differential 100, which is conducive to the compact structure of the differential 100 and the control of the size of the differential 100.

[0045] See also Figures 2 to 5 In some embodiments, the planet carrier 131 includes a sliding tooth portion 1311 and a wheel shaft portion 1313, the wheel shaft portion 1313 includes a first end 13131 and a second end 13132 opposite to each other, the sliding tooth portion 1311 is connected to the first end 13131, and the planetary gear 133 is rotatably connected to the second end 13132. The sliding tooth portion 1311 is provided with a through hole 13111, and at least a portion of the locking unit 33 can extend into the through hole 13111.

[0046] Specifically, the wheel shaft portion 1313 includes a plurality of sliding teeth 1311 disposed at the center of the planet carrier 131 and used to connect the plurality of wheel shaft portions 1313. The wheel shaft portion 1313 includes a first end 13131 and a second end 13132 opposite to each other, and the first end 13131 is used to connect with the sliding teeth 1311. In some embodiments, the sliding teeth 1311 and the wheel shaft portion 1313 are an integral structure, that is, the sliding teeth 1311 and the wheel shaft portion 1313 are an integral structure, thereby improving the bonding strength between the sliding teeth 1311 and the wheel shaft portion 1313, preventing the sliding teeth 1311 and the wheel shaft portion 1313 from separating during the operation of the planet carrier 131, thereby ensuring the stability and reliability of the operation of the planet carrier 131. In other embodiments, the sliding teeth 1311 and the wheel shaft portion 1313 are split structures, that is, the sliding teeth 1311 and the wheel shaft portion 1313 are two different structures. In one example, the first end 13131 of the hub portion 1313 and the hub portion 1313 may be connected together in a detachable manner, including but not limited to a snap connection or a threaded connection, etc. In another example, the first end 13131 of the hub portion 1313 and the hub portion 1313 may be connected together in a non-detachable manner, including but not limited to bonding or welding, etc.

[0047] The second end 13132 is used to connect the planetary gear 133. When the locking unit 33 is not engaged with the planetary gear 133, the second end 13132 serves as the rotation axis of the planetary gear 133, and the planetary gear 133 can rotate around the second end 13132 to achieve independent adjustment of the rotation speed of the half-shaft gears 15 on both sides. Further, the axle portion 1313 of the present application includes four, and the four planetary gears 133 are respectively connected to the second ends 13132 of the four axle portions 1313. When the vehicle 10000 turns, the four planetary gears 133 can rotate around the second ends 13132 of the axle portions 1313 to which they are connected, to achieve adjustment of the rotation speed of the half-shaft gears 15. When the vehicle 10000 is traveling in a straight line, the axle portion 1313 can transmit the power from the housing 11 to the planetary gear 133, and drive the half-shaft gears 15 to rotate virtually.

[0048] The sliding tooth portion 1311 is provided with a through hole 13111, and at least a portion of the locking unit 33 can extend into the through hole 13111. The through hole 13111 can be one or more, and in the present application, there are four through holes 13111. Exemplarily, the number of through holes 13111 corresponds to the locking unit 33. Among them, the opening shape of the through hole 13111 can be but not limited to a circle, an ellipse, a triangle, a quadrilateral or other polygons. Preferably, the opening shape of the through hole 13111 is the same as the cross-sectional shape of at least a portion of the locking unit 33, and the cross-sectional area of ​​the through hole 13111 is slightly smaller than the cross-sectional area of ​​at least a portion of the locking unit 33, so that the through hole 13111 plays a role in fixing and limiting at least a portion of the locking unit 33. That is, when at least part of the locking unit 33 extends into the through hole 13111, the inner wall of the through hole 13111 and at least part of the locking unit 33 form an engagement, and the inner wall of the through hole 13111 provides positioning and guidance for the locking unit 33, so that the locking unit 33 can move stably in the radial direction.

[0049] See also Figures 4 to 5 In some embodiments, the through hole 13111 is non-circular.

[0050] Specifically, the through hole 13111 is non-circular, and the non-circular shape can limit at least part of the locking unit 33 during movement, prevent the locking unit 33 from rotating in the through hole 13111, and ensure the stability of the engagement between the locking unit 33 and the planetary gear 133. Non-circular shapes include but are not limited to elliptical, polygonal or irregular shapes. Further, the through hole 13111 of the present application is a four-pointed star shape. When at least part of the locking unit 33 extends into the through hole 13111, the inner wall of the non-circular through hole 13111 can limit the moving direction and range of the locking unit 33, preventing it from deflecting in directions other than radial directions. Compared with the circular through hole 13111, the non-circular through hole 13111 enhances the positioning and constraint of the locking unit 33, ensuring that the locking unit 33 moves in the radial direction under the drive of the electromagnetic unit 31 without unnecessary rotation or lateral deviation.

[0051] See also Figures 2 to 4 In some embodiments, the locking unit 33 includes a locking piece 331 and an elastic piece 333, one end of the elastic piece 333 abuts against the wheel shaft portion 1313, and the other end of the elastic piece 333 abuts against the locking unit 33. When the electromagnetic unit 31 is energized, the elastic piece 333 is compressed, and when the electromagnetic unit 31 is de-energized, the elastic piece 333 is reset to push the locking unit 33 to separate from the planetary gear 133, and at least partially withdraw the locking unit 33 from the through hole 13111.

[0052] Specifically, when the electromagnetic unit 31 is powered on, the locking member 331 is used to mesh with the planetary gear 133 to limit the rotation of the planetary gear 133, so as to limit the rotation of the planetary gear 133 around the planetary carrier 131. The locking member 331 may be made of plastic or metal. When the locking member 331 is made of plastic, the locking member 331 has good insulation performance, low cost, and light weight. When the locking member 331 is made of metal, the locking member 331 has high strength, good wear resistance, and long service life.

[0053] The elastic member 333 is used to push the locking unit 33 to separate from the planetary gear. The elastic member 333 can be an element with elastic deformation ability such as a coil spring or a leaf spring, which is not limited in this application. The elastic member 333 can be one or more. The elastic members 333 of this application are 4, which matches the number of the locking units 33. The elastic member 333 is sleeved on the locking member 331, which is conducive to the elastic member 333 not being easily displaced during the compression and reset process. One end of the elastic member 333 abuts the wheel shaft portion 1313, and the other end abuts the locking member 331, and the driving and resetting functions are completed by the transmission of elastic force. When the electromagnetic unit 31 is energized, the locking member 331 moves in the direction close to the wheel shaft portion 1313, and the elastic member 333 is compressed by the action force of the wheel shaft portion 1313 and the locking member 331, and the locking member 331 is locked with the planetary gear 133. When the electromagnetic unit 31 is powered off, the elastic member 333 is reset, and the elastic member 333 recovers from the compressed state to the natural state. The elastic member 333 stretches to push the locking member 331 to move away from the wheel shaft portion 1313 until the planetary gear 133 is separated, thereby ensuring that when the electromagnetic unit 31 is powered off, the planetary gear 133 can rotate around its own axis, that is, the planetary gear 133 restores the differential function.

[0054] See also Figure 2 , Figure 3 and Figure 5 In some embodiments, the locking member 331 includes a locking portion 3311 and a connecting portion 3312. The locking portion 3311 can be engaged with the planetary gear 133 to limit the planetary gear 133 from rotating around the planetary carrier 131; the connecting portion 3312 can move in and out of the through hole 13111.

[0055] Specifically, in some embodiments, the locking portion 3311 and the connecting portion 3312 are an integral structure, that is, the locking portion 3311 and the connecting portion 3312 are an integral structure, thereby improving the bonding strength between the locking portion 3311 and the connecting portion 3312, preventing the locking portion 3311 and the connecting portion 3312 from separating during the operation of the locking member 331, thereby ensuring the stability and reliability of the operation of the locking member 331. In other embodiments, the locking portion 3311 and the connecting portion 3312 are split structures, that is, the locking portion 3311 and the connecting portion 3312 are two different structures. In one example, the locking portion 3311 and the connecting portion 3312 can be combined together in a detachable connection manner, and the detachable connection manner includes but is not limited to a snap connection or a threaded connection. In another example, the locking portion 3311 and the connecting portion 3312 can be combined together in a non-detachable connection manner, and the non-detachable connection manner includes but is not limited to bonding or welding.

[0056] When the electromagnetic unit 31 is powered on, on the projection of the axis X of the planetary unit 13, the locking portion 3311 drives the connecting portion 3312 to move radially along the through hole 13111 until the locking portion 3311 is engaged with the planetary gear 133, and at least part of the projection of the locking portion 3311 coincides with the projection of the planetary gear 133. That is, when the electromagnetic unit 31 is powered on, the locking portion 3311 can be engaged with the planetary gear 133. The locking portion 3311 can be in the shape of a tooth, a ratchet, or other shapes that are engaged with the planetary gear 133, so as to ensure that the locking portion 3311 can limit the rotation of the planetary gear 133 around its own axis in the engaged state, and the moving path of the connecting portion 3312 in the through hole 13111 is guided and limited by the inner wall of the through hole 13111, so as to avoid displacement or rotation outside the radial direction, thereby ensuring the precise engagement of the locking portion 3311 with the planetary gear 133.

[0057] See also Figure 2 and Figure 3 In some embodiments, the locking assembly 30 also includes a moving unit 35, which is disposed between the electromagnetic unit 31 and the locking unit 33. The housing 11 is provided with a mounting hole 111, and the moving unit 35 can move in the mounting hole 111. The moving unit 35 is connected to the planetary unit 13. When the electromagnetic unit 31 is energized, in the axial direction of the planetary unit 13, the electromagnetic unit 31 drives the moving unit 35 to move in a first direction A close to the locking unit 33, so as to push the locking unit 33 to move in a second direction B close to the center of the planetary unit 13 in the radial direction of the planetary unit 13.

[0058] Specifically, the moving unit 35 is disposed between the electromagnetic unit 31 and the locking unit 33, and is used to push the locking unit 33 to move in the second direction B when the electromagnetic unit 31 is powered on. The second direction B is a moving direction close to the center of the planetary unit 13 in the radial direction of the planetary unit 13. The moving unit 35 can move in the axial direction in the mounting hole 111, and the inner wall of the mounting hole 111 provides a guiding function for the moving unit 35, ensuring that the moving path of the moving unit 35 is accurate and stable. The moving unit 35 is connected to the planetary unit 13, and drives the locking unit 33 to complete radial movement through its axial movement.

[0059] When the electromagnetic unit 31 is energized, the moving unit 35 moves toward the first direction A close to the locking unit 33. The force of the moving unit 35 is transmitted to the locking unit 33 through the connecting portion 3312, so that the locking unit 33 moves in the second direction B close to the center of the planetary unit 13 in the radial direction of the planetary unit 13 until the locking unit 33 is fully engaged with the meshing portion of the planetary gear 133, thereby limiting the rotation of the planetary unit 13 around its own axis and ensuring that the differential 100 is in a locked state.

[0060] When the electromagnetic unit 31 is powered off, the moving unit 35 moves in a direction opposite to the first direction A away from the locking unit 33 under the action of the elastic member 333, thereby driving the locking unit 33 to move in a direction opposite to the second direction B away from the center of the planetary unit 13 in the radial direction of the planetary unit 13, until the locking unit 33 completely exits the through hole 13111 and separates from the planetary gear 133. At this time, the planetary unit 13 resumes the free rotation state, and the differential function of the differential 100 is reactivated.

[0061] See also Figure 2 and Figure 3 In some embodiments, the moving unit 35 is provided with a first guide slope 3521, and the planetary unit 13 is provided with a second guide slope 3313. The first guide slope 3521 and the second guide slope 3313 are connected and can slide relative to each other to push the locking unit 33 to move in the radial direction of the planetary unit 13.

[0062] Specifically, the shapes of the first guiding inclined surface 3521 and the second guiding inclined surface 3313 match each other. For example, the first guiding inclined surface 3521 and the second guiding inclined surface 3313 can be straight inclined surfaces, arc-shaped inclined surfaces or other shapes that can slide relative to each other, ensuring stable contact and uniform force during the sliding process. The angle between the first guiding inclined surface 3521 and the second guiding inclined surface 3313 and the axis X is not limited, and the angle is 45° in this application.

[0063] When the electromagnetic unit 31 is powered on, the moving unit 35 moves along the axial direction of the planetary unit 13 under the action of the electromagnetic force, and the first guide bevel 3521 slides relative to the second guide bevel 3313, thereby converting the axial force into a radial force. The radial force is transmitted to the locking unit 33 through the second guide bevel 3313, pushing the locking unit 33 to move in the direction (first direction A) close to the center of the planetary unit 13 until the locking unit 33 is engaged with the planetary gear 133. When the electromagnetic unit 31 is powered off, the elastic member 333 provides a reset force, pushing the locking unit 33 to move in the second direction B away from the center of the planetary unit 13, and the relative sliding between the first guide bevel 3521 and the second guide bevel 3313 converts the radial force into an axial force, which is transmitted to the moving unit 35, so that the moving unit 35 moves in the direction away from the locking unit 33.

[0064] See also Figure 2 , Figure 3 and Figure 5In some embodiments, the locking assembly 30 further includes a rotating unit 37. The rotating unit 37 is disposed between the electromagnetic unit 31 and the moving unit 35. When the electromagnetic unit 31 is powered off, the housing 11 rotates around the axis X direction of the planetary unit 13, and drives the rotating unit 37, the moving unit 35 and the locking unit 33 to rotate synchronously; when the electromagnetic unit 31 is powered on, the electromagnetic unit 31 absorbs the rotating unit 37 to limit the rotation of the rotating unit 37, and the rotating unit 37 pushes the moving unit 35 to move in the first direction A close to the locking unit 33.

[0065] Specifically, the rotating unit 37 is sleeved on the outside of the housing 11. The electromagnetic unit 31 and the rotating unit 37 are fixed by a pressure plate and a retaining spring. When the housing 11 rotates, the housing 11 can drive the rotating unit 37 to rotate synchronously. In the axis X direction of the planetary unit 13, the rotating unit 37 is located between the electromagnetic unit 31 and the moving unit 35. When the electromagnetic unit 31 is powered on, the rotating unit 37 is attracted by the magnetic force generated by the electromagnetic unit 31 and stops rotating, while the housing 11 continues to rotate around the axis X of the planetary unit 13 driven by the large gear 17, so that a relative motion is generated between the rotating unit 37 and the housing 11. Further, the moving unit 35 is accommodated in the mounting hole 111 of the housing 11, so the moving unit 35 rotates around the axis X of the planetary unit 13 following the housing 11, and a relative motion is generated between the rotating unit 37 and the moving unit 35. The rotating unit 37 converts the axial force of the electromagnetic unit 31 into the radial force of the moving unit 35, thereby pushing the moving unit 35 to move in the first direction A close to the locking unit 33. The moving unit 35 further pushes the locking unit 33 to move radially toward the center of the planetary unit 13 , the locking member 331 engages with the planetary gear 133 , and the elastic member 333 is compressed.

[0066] When the electromagnetic unit 31 is powered off, the electromagnetic unit 31 does not generate magnetic force, the rotating unit 37 is restored to a state where it can rotate around the axis X of the planetary unit 13, the housing 11 drives the rotating unit 37 and the mobile unit 35 to rotate synchronously along the axis of the planetary unit 13, a relative motion is generated between the rotating unit 37 and the mobile unit 35, and the rotating unit 37 does not generate a force on the mobile unit 35. The elastic member 333 provides a reset force to push the locking unit 33 to move in the second direction B away from the center of the planetary unit 13, thereby pushing the mobile unit 35 to restore to its original position, and the differential 100 restores the differential function.

[0067] See also Figure 2 , Figure 3 and Figure 5In some embodiments, the rotating unit 37 is provided with a sliding track 371, and the mobile unit 35 is at least partially accommodated in the sliding track 371 and can slide in the track. The sliding track 371 of the present application includes four, corresponding to the number of the locking units 33, and the sliding track 371 is symmetrically distributed on the rotating unit 37. The sliding track 371 includes a first position 3711 and a second position 3712, and the second position 3712 is closer to the planetary unit 13 in the axis X direction of the planetary unit 13 than the first position 3711. When the electromagnetic unit 31 is powered off, the mobile unit 35 is located at the first position 3711 and rotates synchronously with the rotating unit 37; when the electromagnetic unit 31 is powered on, the rotating unit 37 stops rotating, and the rotating unit 37 pushes the mobile unit 35 from the first position 3711 to the second position 3712.

[0068] Specifically, the sliding track 371 is used to limit and guide the movement path of the mobile unit 35 in the direction of the axis X of the planetary unit 13. One end of the mobile unit 35 abuts against the sliding track 371 and can slide in the sliding track 371. Exemplarily, the sliding track 371 of the present application is a V-shaped groove provided on the rotating unit 37, and the groove has two intersecting side walls. The sliding track 371 has a first position 3711 and a second position 3712, and the first position 3711 is the intersection of the two side walls. When one end of the mobile unit 35 abuts against the first position 3711, a larger part of the mobile unit 35 is accommodated in the groove, so the mobile unit 35 is farther away from the planetary unit 13 in the axis direction of the planetary unit 13. That is, the first position 3711 is the initial position of the mobile unit 35 farther away from the planetary unit 13 in the axis direction of the planetary unit 13. The second is an end of the two side walls away from the intersection. When one end of the mobile unit 35 abuts the second position 3712, a smaller portion of the mobile unit 35 is accommodated in the groove. Therefore, the mobile unit 35 is closer to the planetary unit 13 in the axial direction of the planetary unit 13. That is, the second position 3712 is the final position of the mobile unit 35 closer to the planetary unit 13 in the axial direction of the planetary unit 13. The sliding track 371 can constrain the movement direction of the mobile unit 35 to ensure that the mobile unit 35 can slide from the first position 3711 to the second position 3712, or slide from the second position 3712 to the first position 3711.

[0069] When the electromagnetic unit 31 is powered, the rotating unit 37 stops rotating under the magnetic force of the electromagnetic unit 31, and the side wall of the sliding track 371 generates an abutting force on the moving unit 35. The rotating unit 37 pushes the moving unit 35 from the first position 3711 to the second position 3712 through the sliding track 371. When the moving unit 35 is at the second position 3712, the force further pushes the locking unit 33 to move radially to a position meshing with the planetary gear 133 to lock the planetary gear 133.

[0070] When the electromagnetic unit 31 is powered off, the rotating unit 37 loses its magnetic attraction and can be driven by the housing 11 to rotate synchronously around the axis X direction of the planetary unit 13. The mobile unit 35 is now located at the first position 3711 and rotates synchronously with the rotating unit 37. The mobile unit 35 is elastically pushed back from the second position 3712 to the first position 3711, so that the locking unit 33 is separated from the planetary unit 13, thereby restoring the normal function of the differential 100. In the process of the mobile unit 35 switching from the first position 3711 to the second position 3712 and from the second position 3712 back to the first position 3711, the sliding track 371 can limit the movement path of the mobile unit 35 and limit the redundant displacement, thereby avoiding interference or movement deviation between the internal components of the differential 100, and ensuring the switching of the locking assembly 30 at different positions.

[0071] See also Figure 2 and Figure 3 In some embodiments, the moving unit 35 includes a first moving member 351 and a second moving member 352, one end of the first moving member 351 is connected to the sliding rail 371, the other end of the first moving member 351 is connected to one end of the second moving member 352, the other end of the second moving member 352 is connected to the locking unit 33, and the radial dimension of the first moving member 351 is smaller than the radial dimension of the second moving member 352.

[0072] Specifically, the first moving member 351 is used to be connected with the sliding track 371, and the second moving member 352 is used to be connected with the planetary gear 133. The first moving member 351 and the second moving member 352 are connected, and can move in the mounting hole 111. In the present application, the first moving member 351 and the second moving member 352 are relatively static, and relative motion does not occur, which is conducive to the transmission of the force. In certain embodiments, the first moving member 351 and the second moving member 352 are an integral structure, that is, the first moving member 351 and the second moving member 352 are an integral structure, which can promote the bonding strength between the first moving member 351 and the second moving member 352, prevent the first moving member 351 and the second moving member 352 from separating during the working process of the locking member 331, thereby ensuring the stability and reliability of the locking member 331. In other embodiments, the first moving member 351 and the second moving member 352 are split structures, that is, the first moving member 351 and the second moving member 352 are two different structures. In one example, the first movable member 351 and the second movable member 352 can be connected together in a detachable connection, including but not limited to a snap connection or a threaded connection, etc. In another example, the first movable member 351 and the second movable member 352 can be connected together in a non-detachable connection, including but not limited to bonding or welding, etc.

[0073] The radial dimension of the first moving member 351 is smaller than that of the second moving member 352, that is, the radial projection value of the width or thickness of the first moving member 351 is smaller than the radial projection value of the width or thickness of the second moving member 352. The first moving member 351 is small in size and can better adapt to the limit of the sliding track 371, reduce friction and ensure smooth sliding; while the second moving member 352 is large in size and can receive and transmit the driving force of the first moving member 351, thereby driving the locking unit 33 to move.

[0074] See also Figure 2 , Figure 3 and Figure 7 The present application provides a powertrain. The powertrain includes a reducer 1000. The reducer 1000 includes the differential 100 of any one of the above embodiments.

[0075] Specifically, when the electromagnetic unit 31 of the differential 100 of the powertrain is energized, the electromagnetic unit 31 drives the locking unit 33 to move radially of the planetary unit 13 and mesh with the planetary gear 133, so that the planetary gear 133 cannot rotate relative to the planetary carrier 131. When the vehicle 10000 slips and the half-shaft gears 15 need to rotate synchronously, the two half-shaft gears 15 can rotate at the same speed. Furthermore, the radial movement of the locking unit 33 does not occupy the axial space of the planetary unit 13, making the structure of the differential 100 more compact. In addition, the planetary gear 133 is located inside the housing 11, and the space for the radial movement of the locking unit 33 is the space inside the housing 11 itself for accommodating the planetary gears, that is, the locking unit 33 does not increase the volume of the differential 100, which is conducive to the compact structure of the differential 100 and the control of the size of the differential 100.

[0076] See also Figure 2 , Figure 3 and Figure 7 The present application provides a vehicle 10000, and the vehicle 10000 includes a powertrain according to any one of the above-mentioned embodiments.

[0077] Specifically, when the electromagnetic unit 31 of the differential 100 of the vehicle 10000 is powered on, the electromagnetic unit 31 drives the locking unit 33 to move radially of the planetary unit 13 and mesh with the planetary gear 133, so that the planetary gear 133 cannot rotate relative to the planetary carrier 131. When the vehicle 10000 slips and the half-shaft gears 15 need to rotate synchronously, the two half-shaft gears 15 can rotate at the same speed. Furthermore, the radial movement of the locking unit 33 does not occupy the axial space of the planetary unit 13, making the structure of the differential 100 more compact. In addition, the planetary gear 133 is located inside the housing 11, and the space for the radial movement of the locking unit 33 is the space inside the housing 11 itself for accommodating the planetary gears, that is, the locking unit 33 does not increase the volume of the differential 100, which is conducive to the compact structure of the differential 100 and the control of the size of the differential 100.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments of the present application without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A differential (100), characterized in that: include: A differential assembly (10) comprises a housing (11), wherein a planetary unit (13) is arranged in the housing (11), wherein the planetary unit (13) comprises a planetary carrier (131) and a planetary wheel (133), wherein the planetary wheel (133) is rotatably connected to the planetary carrier (131); and The locking assembly (30) comprises an electromagnetic unit (31) and a locking unit (33). When the electromagnetic unit (31) is powered on, the electromagnetic unit (31) can drive the locking unit (33) to move in a direction close to the center of the planetary unit (13) in the radial direction of the planetary unit (13) and mesh with the planetary wheel (133) to limit the planetary wheel (133) from rotating around the planetary carrier (131). When the electromagnetic unit (31) is powered off, the locking unit (33) is separated from the planetary wheel (133), and the planetary wheel (133) can rotate around the planetary carrier (131).

2. The differential (100) according to claim 1, characterized in that: The planet carrier (131) includes a sliding tooth portion (1311) and a wheel shaft portion (1313); the wheel shaft portion (1313) includes a first end (13131) and a second end (13132) that are opposite to each other; the sliding tooth portion (1311) is connected to the first end (13131); the planet wheel (133) is rotatably connected to the second end (13132); the sliding tooth portion (1311) is provided with a through hole (13111); at least a portion of the locking unit (33) can extend into the through hole (13111).

3. The differential (100) according to claim 2, characterized in that: The through hole (13111) is non-circular.

4. The differential (100) according to claim 2, characterized in that: The locking unit (33) comprises a locking member (331) and an elastic member (333), one end of the elastic member (333) abuts against the wheel shaft portion (1313), and the other end of the elastic member (333) abuts against the locking unit (33); when the electromagnetic unit (31) is powered on, the elastic member (333) is compressed; when the electromagnetic unit (31) is powered off, the elastic member (333) is reset to push the locking unit (33) to separate from the planetary gear (133), and at least part of the locking unit (33) exits the through hole (13111).

5. The differential (100) according to claim 4, characterized in that: The locking member (331) includes a locking portion (3311) and a connecting portion (3312), wherein the locking portion (3311) and the connecting portion (3312) are connected, and the locking portion (3311) is engaged with the planetary gear (133) to limit the planetary gear (133) from rotating around the planetary carrier (131); and the connecting portion (3312) is capable of moving in and out of the through hole (13111).

6. The differential (100) according to claim 1, characterized in that: The locking assembly (30) further comprises a moving unit (35), wherein the moving unit (35) is arranged between the electromagnetic unit (31) and the locking unit (33); the housing (11) is provided with a mounting hole (111), and the moving unit (35) is movable in the mounting hole (111); the moving unit (35) is connected to the planetary unit (13); when the electromagnetic unit (31) is energized, the electromagnetic unit (31) drives the moving unit (35) to move in a first direction close to the locking unit (33) in the axial direction of the planetary unit (13), so as to push the locking unit (33) to move in a second direction close to the center of the planetary unit (13) in the radial direction of the planetary unit (13).

7. The differential (100) according to claim 6, characterized in that: The moving unit (35) is provided with a first guiding inclined surface (3521), and the locking unit (33) is provided with a second guiding inclined surface (3313); the first guiding inclined surface (3521) and the second guiding inclined surfaces are connected and can slide relative to each other to push the locking unit (33) to move in the radial direction of the planetary unit (13).

8. The differential (100) according to claim 6, characterized in that: The locking assembly (30) further comprises a rotating unit (37), wherein the rotating unit (37) is arranged between the electromagnetic unit (31) and the moving unit (35). When the electromagnetic unit (31) is powered off, the housing (11) rotates around the axis of the planetary unit (13), and drives the rotating unit (37), the moving unit (35) and the locking unit (33) to rotate synchronously; When the electromagnetic unit (31) is powered on, the electromagnetic unit (31) absorbs the rotating unit (37) to limit the rotation of the rotating unit (37), and the rotating unit (37) pushes the moving unit (35) to move in a first direction close to the locking unit (33).

9. The differential (100) according to claim 8, characterized in that: The rotating unit (37) is provided with a sliding track (371), and the movable unit (35) is at least partially accommodated in the sliding track (371) and is capable of sliding in the track. The sliding track (371) includes a first position (3711) and a second position (3712), and the second position (3712) is closer to the planetary unit (13) in the axial direction of the planetary unit (13) than the first position (3711). When the electromagnetic unit (31) is powered off, the movable unit (35) is located at the first position (3711) and rotates synchronously with the rotating unit (37); when the electromagnetic unit (31) is powered on, the rotating unit (37) stops rotating, and the rotating unit (37) pushes the movable unit (35) to move from the first position (3711) to the second position (3712).

10. The differential (100) according to claim 9, characterized in that: The moving unit (35) comprises a first moving member (351) and a second moving member (352), one end of the first moving member (351) is connected to the sliding track (371), the other end of the first moving member (351) is connected to one end of the second moving member (352), the other end of the second moving member (352) is connected to the locking unit (33), and the radial dimension of the first moving member (351) is smaller than the radial dimension of the second moving member (352).

11. A power assembly (1000), characterized in that: include: A speed reducer comprising a differential (100) according to any one of claims 1 to 10.

12. A vehicle (10000), characterized in that: It includes: The powertrain according to claim 11.

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