Speed reducer assembly and automobile

Abstract

The utility model provides a kind of reducer assembly, disconnect mechanism is arranged between the one end of transmission mechanism that transmits motor power and differential housing;Disconnect mechanism includes driving member connected with transmission mechanism, and driven member connected with differential housing;Driving mechanism drives driving member to move relative to driven member between combination position and disconnect position, to make driving member and driven member combine and drive connection, or make driving member and driven member separate.The reducer assembly disconnect mechanism of the utility model combines and cuts off in differential outside, differential works in whole state, there is no mutual movement between internal parts, can improve the strength and NVH problem generated by wear;And can keep the integrity of differential system, reduce size accumulation, more easily realize assembly modularization.Also provide the car with the reducer assembly.

Description

Technical Field

[0001] This utility model belongs to the field of automotive transmission technology, and specifically relates to a reducer assembly and an automobile having the reducer assembly. Background Technology

[0002] In pure electric or hybrid drive systems, when the vehicle's power demand is low, the auxiliary drive electric drive assembly does not operate. In this scenario, the wheels will drive the motor to rotate in the opposite direction, thereby increasing the system's drag torque, resulting in a decrease in transmission efficiency and adversely affecting the vehicle's driving range. To address this issue, existing technologies generally incorporate a disconnection mechanism that separates the transmission between the wheels and the motor. This disconnection mechanism primarily uses synchronizers, electromagnetic clutches, dog clutches, and one-way clutches, achieving power transmission and disconnection through their engagement and disengagement.

[0003] Currently, there are two main schemes for setting the disconnect mechanism: the intermediate shaft method and the differential method. The intermediate shaft method involves placing the disconnect mechanism on the intermediate shaft, allowing power transmission to be engaged and disengaged at the intermediate shaft. The differential method involves placing the disconnect mechanism on the differential, allowing power transmission to be engaged and disengaged at the differential. In the differential method, the existing technology causes the disconnect mechanism to operate inside the differential, resulting in greater wear between differential components and negatively impacting the differential's strength and NVH performance. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the prior art, the disconnecting mechanism located at the differential position cuts off inside the differential, resulting in significant wear between differential parts, which in turn adversely affects the strength and NVH performance of the differential.

[0005] To address the aforementioned technical problems, this utility model discloses a reducer assembly, including a transmission mechanism, a differential, and a disconnection mechanism. The differential includes a differential housing. One end of the transmission mechanism is used for transmission connection with a motor to transmit the motor's power. The disconnection mechanism is disposed between the other end of the transmission mechanism and the differential housing, and includes: a driving member, which is transmissionally connected to the other end of the transmission mechanism; and a driven member, which is transmissionally connected to the differential housing. The reducer assembly also includes a drive mechanism for driving the driving member to move relative to the driven member between an engaged position and a disconnected position. When the driving member is in the engaged position, the driving member and the driven member are engaged and transmissionally connected, so that the power transmitted by the transmission mechanism is transmitted sequentially through the driving member and the driven member to the differential housing. When the driving member is in the disconnected position, the driving member and the driven member are separated, so as to cut off the power transmission between the transmission mechanism and the differential housing.

[0006] The reducer assembly provided by this utility model has a disconnection mechanism located outside the differential housing. The power disconnection or engagement between the transmission mechanism and the differential is achieved by moving the driving component outside the differential housing. Therefore, both engagement and disengagement of the disconnection mechanism occur outside the differential, allowing the differential to operate as a single unit. There is no mutual movement between internal parts, which improves the strength and NVH (noise, vibration, and harshness) issues caused by wear. Furthermore, it preserves the integrity of the differential system, reduces size accumulation, and facilitates modular assembly.

[0007] According to another specific embodiment of the present invention, a speed reducer assembly is disclosed in the embodiment of the present invention, wherein the transmission mechanism includes a planetary gear transmission group, and the planetary gear transmission group includes a planet carrier; wherein the end of the planet carrier constitutes the other end of the transmission mechanism and is connected to the driving member for transmission.

[0008] According to another specific embodiment of the present invention, a reducer assembly is disclosed in this embodiment. The driven component includes a coupling gear ring, which is sleeved on the outer periphery of the differential housing and fixedly connected to the differential housing. The driving component includes a synchronizer, which is sleeved on the outer periphery of the differential housing and disposed on the side of the coupling gear ring near the planetary gear transmission set. A drive mechanism is used to drive the synchronizer to move relative to the coupling gear ring along the axial direction of the differential housing between an engaged position and a disengaged position. When the synchronizer is in the engaged position, it meshes with the coupling gear ring; when the synchronizer is in the disengaged position, it separates from the coupling gear ring.

[0009] Using the above technical solution, the disconnection mechanism is set as a synchronizer and a matching gear ring structure, which is simple in structure and both are set on the outer periphery of the differential housing, resulting in high integration.

[0010] According to another specific embodiment of the present invention, a reducer assembly is disclosed in the embodiment of the present invention, wherein the planetary gear transmission group is arranged along the axial direction of the differential housing; wherein the end of the planetary carrier is disposed on the outer periphery of the differential housing, and the inner wall of the end of the planetary carrier is rotatably connected to the outer wall of the differential housing, and the outer wall of the end of the planetary carrier is movably connected to the inner wall of the synchronizer along the axial direction of the differential housing and is also connected in a circumferential transmission manner along the differential housing.

[0011] By adopting the above technical solution, the planetary gear transmission group is arranged along the axis of the differential, so that the differential and the planetary gear transmission group have a common space in the axial direction. This can effectively shorten the axial arrangement distance of the reducer assembly, which is beneficial to the overall vehicle layout and weight reduction.

[0012] According to another specific embodiment of the present invention, a reducer assembly is disclosed in which the inner wall of the end of the planetary carrier is connected to the outer wall of the differential housing by a needle roller bearing, and the outer wall of the end of the planetary carrier is connected to the inner wall of the synchronizer by a spline.

[0013] By adopting the above technical solution, the transformation from sliding friction to rolling friction is achieved through needle roller bearings, and the outer wall of the end of the planetary carrier and the inner wall of the synchronizer are axially movable and circumferentially connected through splines, resulting in a simple structure.

[0014] According to another specific embodiment of the present invention, a reducer assembly disclosed in this embodiment of the present invention further includes a sun gear shaft, a sun gear, a driven planetary gear, and a driving planetary gear arranged axially along the differential housing and connected in sequence; wherein the end of the planet carrier away from the synchronizer is arranged on the outer periphery of the input end of the sun gear shaft, and a bearing is arranged between the planet carrier and the sun gear shaft, and the end of the planet carrier passes through the driven planetary gear and the driving planetary gear in sequence and is arranged on the outer periphery of the differential housing.

[0015] According to another specific embodiment of the present invention, a speed reducer assembly is disclosed in the embodiment of the present invention, wherein the drive mechanism includes an electromagnetic component and a reset component; the electromagnetic component drives a synchronizer to move relative to the engagement gear ring in a first direction via magnetism; the reset component drives the synchronizer to move relative to the engagement gear ring in a second direction; wherein the first direction and the second direction are opposite.

[0016] According to another specific embodiment of the present invention, a speed reducer assembly is disclosed in the embodiment of the present invention, wherein the electromagnetic component includes an electromagnetic ring, the electromagnetic ring is sleeved on the outer periphery of the synchronizer and located at one end close to the engagement gear ring; and the first direction is the movement direction from the disconnected position to the engagement position.

[0017] By adopting the above technical solution, the disconnection mechanism and the drive mechanism are arranged along the radial direction of the differential housing and outside the end of the planetary carrier, which further reduces the occupation of axial space, is beneficial to the overall vehicle layout, makes the assembly structure more compact, and improves the vehicle's range.

[0018] According to another specific embodiment of the present invention, a reducer assembly disclosed in this embodiment includes a reset component comprising a plurality of springs arranged circumferentially along the synchronizer. One end of each spring is fixedly connected to the end of the synchronizer away from the engagement gear ring, and the other end of each spring is fixedly connected to the other end of the transmission mechanism or the differential housing. When the synchronizer is in the engagement position, each spring is in a stretched state.

[0019] The present invention also discloses an automobile, including the reducer assembly provided by the present invention. Attached Figure Description

[0020] Figure 1 This is a cross-sectional structural diagram of the reducer assembly provided by this utility model;

[0021] Figure 2This is a schematic diagram of the power transmission route of the drive component of the reducer assembly provided by this utility model when it is in the engagement position;

[0022] Figure 3 This is a schematic diagram of the torque transmission path of the drive component of the reducer assembly in the disconnected position provided by this utility model;

[0023] Figure 4 yes Figure 1 A partially enlarged structural diagram of the disconnection mechanism and the drive mechanism.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Transmission mechanism; 11. Planet carrier; 12. Sun gear shaft; 13. Sun gear; 14. Driven planetary gear; 15. Driving planetary gear; 16. Ring gear; 17. Second bearing; 18. Third bearing; 19. Fourth bearing.

[0026] 20. Differential; 21. Differential housing; 22. Planetary shaft; 23. Planetary gear; 24. Half-shaft gear; 25. First bearing.

[0027] 30. Disconnection mechanism; 31. Driving element; 311. Synchronizer; 3111. Gear hub; 3112. Gear sleeve; 32. Driven element; 321. Engaging gear ring.

[0028] 40. Drive mechanism; 41. Electromagnetic component; 42. Reset component; 421. Baffle.

[0029] 50. Outer shell. Detailed Implementation

[0030] In pure electric or hybrid drive systems, a disconnect mechanism is typically included to separate the transmission between the wheels and the motor. This mechanism engages and disengages power transmission. Currently, there are two main disconnect mechanism designs: the intermediate shaft design and the differential design. The intermediate shaft design places the disconnect mechanism on the intermediate shaft, allowing power transmission to engage and disengage at this point. The differential design places the disconnect mechanism on the differential, allowing power transmission to engage and disengage at the differential. However, in the differential design, the disconnect mechanism operates within the differential itself, leading to greater wear between differential components and negatively impacting differential strength and NVH performance.

[0031] To address the aforementioned problems, this utility model discloses a reducer assembly. A disconnection mechanism is disposed between one end of the transmission mechanism that transmits motor power and the differential housing. The disconnection mechanism includes a driving member connected to the transmission mechanism and a driven member connected to the differential housing. A drive mechanism drives the driving member to move relative to the driven member between an engaged position and a disconnected position, so that the driving member and the driven member are engaged and connected, or the driving member and the driven member are separated. In this reducer assembly, the disconnection mechanism is located outside the differential housing, and the power disconnection or engagement between the transmission mechanism and the differential is achieved by moving the driving member outside the differential housing. Therefore, both engagement and disengagement of the disconnection mechanism occur outside the differential, allowing the differential to operate as a whole, with no mutual movement between internal parts. This improves the strength and NVH (noise, vibration, and harshness) issues caused by wear; it also preserves the integrity of the differential system, reduces size accumulation, and facilitates modular assembly.

[0032] To better understand the reducer assembly and its configuration provided in this application, the reducer assembly will be described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] This embodiment provides a speed reducer assembly, which integrates a speed reducer and a differential, such as... Figure 1 As shown, the reducer assembly includes a transmission mechanism 10, a differential 20, a disconnection mechanism 30, and a drive mechanism 40.

[0035] like Figure 1 As shown, the differential 20 includes a differential housing 21, a planetary shaft 22 fixedly connected inside the differential housing 21, at least two planetary gears 23 and two half-shaft gears 24 disposed in the differential housing 21, each planetary gear 23 being disposed on the planetary shaft 22, and each half-shaft gear 24 meshing with each planetary gear 23; the reducer assembly may also be provided with a housing 50, one end of the differential housing 21 being connected to the housing 50 via a first bearing 25.

[0036] One end of the transmission mechanism 10 is used to connect with the motor to transmit the motor's power; the transmission mechanism 10 can specifically be a gear reduction mechanism, a worm gear reduction mechanism, or a planetary gear reduction mechanism, etc. In a specific embodiment, such as... Figure 1 As shown, the transmission mechanism 10 is a planetary gear reducer mechanism, including a planetary gear transmission assembly, which includes a planet carrier 11. Further, in a specific embodiment, as... Figure 1 As shown, the planetary gear transmission assembly also includes a sun gear shaft 12, a sun gear 13, a driven planetary gear 14, and a driving planetary gear 15, which are connected in sequence. The planetary gear transmission assembly also includes a gear ring 16, whose internal teeth mesh with the external teeth of the driving planetary gear 15.

[0037] like Figure 1 As shown, the disconnection mechanism 30 is disposed between the other end of the transmission mechanism 10 and the differential housing 21, and includes a driving member 31 and a driven member 32. The driving member 31 is driven to the other end of the transmission mechanism 10 (i.e. the end away from the motor). When the transmission mechanism 10 includes a planetary gear transmission set, the end of the planet carrier 11 constitutes the other end of the transmission mechanism 10 and is driven to the driving member 31; the driven member 32 is driven to the differential housing 21.

[0038] The drive mechanism 40 is used to drive the driving member 31 to move relative to the driven member 32 between an engaged position and a disengaged position. When the driving member 31 is in the engaged position, it is engaged with and driven by the driven member 32, and their transmission is connected. Figure 2 As shown by the dashed arrow, the power transmitted by the transmission mechanism 10 is sequentially transmitted to the differential housing 21 via the driving member 31 and the driven member 32. After receiving the power from the transmission mechanism 10, the differential housing 21 transmits the power to the half-shafts and wheels via the planetary shaft 22, planetary gears 23, and half-shaft gears 24. When the driving member 31 is in the disengaged position, the driving member 31 is separated from the driven member 32, as shown by the dashed arrow. Figure 3 As shown by the dashed arrow, the power transmission between the transmission mechanism 10 and the differential housing 21 is cut off. The half-shaft rotates with the wheel and transmits torque to the half-shaft gear 24, which in turn causes the planetary gear 23 and the differential housing 21 to rotate. Since the driving member 31 and the driven member 32 are separated, the differential housing 21 is disconnected from the transmission mechanism 10, and the torque of the wheel will not be transmitted to the transmission mechanism 10. Furthermore, since the planetary gear 23 does not rotate on its own, there is no relative movement between the parts. The differential 20 rotates as a whole, and there is no sliding friction caused by relative movement, which can avoid wear, noise and strength problems caused by this.

[0039] Specifically, structures that can be matched and disengaged can be provided on the side of the driving member 31 near the driven member 32 and on the side of the driven member 32 facing the driving member 31, respectively. For example, matching engagement teeth or matching splines can be provided respectively. After the driving member 31 moves to engage with the driven member 32, torque can be transmitted by engaging the engagement teeth or splines. When the driving member 31 moves away from the driven member 32, the driving member 31 and the driven member 32 can be separated without obstruction. More specifically, the driving member 31 can be a synchronizer or a clutch structure. The driving member 31 can be fixedly connected to the other end of the transmission mechanism 10, requiring the other end of the transmission mechanism 10 to move together with the driving member 31. Alternatively, the driving member 31 and the other end of the transmission mechanism 10 can be movably connected via a spline or other means, or they can be connected via a transmission structure. As long as the configuration ensures that the driving member 31 is in the engaged position, and the transmission mechanism 10 can transmit power to the driving member 31 when the driving member 31 is engaged with the driven member 32, the transmission mechanism 10 can transmit power to the driving member 31. The driven member 32 can be fixedly connected to the differential housing 21, connected via a spline or other means, or connected via a transmission structure, as long as the configuration ensures that the driven member 32 can transmit power to the differential housing 21. The drive mechanism 40 is specifically selected and configured according to the structure of the driving member 31, and can include an electromagnetic drive mechanism, a motor drive mechanism, or a hydraulic drive mechanism, as long as it can drive the driving member 31 to move.

[0040] This utility model places the disconnection mechanism 30 between the other end of the transmission mechanism 10 and the differential housing 21, that is, outside the differential housing 21. By moving the driving member 31 outside the differential housing 21, the power between the transmission mechanism 10 and the differential 20 is cut off or engaged. When the disconnection mechanism 30 is in use, there is no mutual movement between the internal parts of the differential 20, which can improve the strength and NVH problems caused by wear; and can preserve the integrity of the differential 20 system, reduce size accumulation, and make assembly easier to achieve modularization.

[0041] In one specific implementation, such as Figure 1 As shown, the transmission mechanism 10 includes a planetary gear transmission set, which includes a planet carrier 11; and the driven member 32 includes a coupling gear ring 321, which is sleeved on the outer periphery of the differential housing 21 and fixedly connected to the differential housing 21, specifically by welding or spline connection, thereby realizing the transmission of power from the coupling gear ring 321 to the differential housing 21; the coupling gear ring 321 has a coupling tooth structure on the side facing the driving member 31; the driving member 31 includes a synchronizer 311, which is sleeved on the outer periphery of the differential housing 21 and located on the side of the coupling gear ring 321 near the planetary gear transmission set, specifically, as shown in the figure. Figure 4 As shown, the synchronizer 311 includes a gear hub 3111 sleeved on the outer periphery of the differential housing 21; it may also include a gear sleeve 3112 disposed on the outer periphery of the gear hub 3111 and pulsatorically connected to the gear hub 3111. The drive mechanism 40 is used to drive the synchronizer 311 to move relative to the engaging gear ring 321 along the axial direction of the differential housing 21 between an engaged position and a disengaged position; wherein when the synchronizer 311 is in the engaged position, the synchronizer 311 engages with the engaging gear ring 321, specifically the gear hub 3111 engages with the engaging gear ring 321; when the synchronizer 311 is in the disengaged position, the synchronizer 311 is separated from the engaging gear ring 321.

[0042] The disconnect mechanism 30 is configured as a matching structure between the synchronizer 311 and the engagement gear ring 321. The structure is simple and both are located on the outer periphery of the differential housing 21, resulting in high integration.

[0043] Existing transmission assemblies mostly use the traditional topology of parallel shafts paired with differentials, resulting in a large size and weight of the transmission assembly, which is not conducive to vehicle layout and weight reduction, and further reduces the vehicle's range.

[0044] To solve the above problems, when the transmission mechanism 10 includes a planetary gear transmission set, in one specific embodiment, such as... Figure 1 As shown, the planetary gear transmission assembly is arranged along the axial direction of the differential housing 21; wherein the end of the planet carrier 11 is located on the outer periphery of the differential housing 21, and the inner wall of the end of the planet carrier 11 is rotatably connected to the outer wall of the differential housing 21, specifically through a bearing or the like, so that the planet carrier 11 and the differential 20 can rotate relative to each other; in one specific embodiment, the inner wall of the end of the planet carrier 11 is connected to the outer wall of the differential housing 21 through a needle roller bearing (not shown in the figure) to realize the transformation of sliding friction to rolling friction. The outer wall of the end of the planetary carrier 11 is movably connected to the inner wall of the synchronizer 311 along the axial direction of the differential housing 21 and is also circumferentially connected to the planetary carrier 11, so that the synchronizer 311 can move axially relative to the planetary carrier 11 and can rotate synchronously with the planetary carrier 11 in the circumferential direction. It should be noted that the synchronizer 311 needs to be circumferentially connected to the planetary carrier 11 at least in the engaged position, or the synchronizer 311 can be circumferentially connected to the planetary carrier 11 in both the engaged and disengaged positions. In one specific embodiment, the outer wall of the end of the planetary carrier 11 is connected to the inner wall of the synchronizer 311 by a spline (not shown in the figure) extending axially.

[0045] By arranging the planetary gear transmission set along the axial direction of the differential 20, the differential 20 and the planetary gear transmission set share a common space in the axial direction, which can effectively shorten the axial arrangement distance and facilitate the overall vehicle layout and weight reduction.

[0046] Furthermore, in one specific implementation, such as Figure 1 As shown, when the planetary gear transmission assembly also includes a sun gear shaft 12, a sun gear 13, a driven planetary gear 14, and a driving planetary gear 15, these structures are arranged axially along the differential housing 21 and connected sequentially for transmission. The end of the planet carrier 11 away from the synchronizer 311 is located on the outer periphery of the input end of the sun gear shaft 12, and a second bearing 17 is provided between the planet carrier 11 and the sun gear shaft 12. The end of the planet carrier 11 passes sequentially through the driven planetary gear 14 and the driving planetary gear 15 and is located on the outer periphery of the differential housing 21. A third bearing 18 can be provided between the end of the differential housing 21 near the planetary gear transmission assembly and the planet carrier 11. In addition, the reducer assembly can also be provided with a housing 50, and the end of the planet carrier 11 away from the synchronizer 311 is connected to the housing 50 through a fourth bearing 19.

[0047] In one specific implementation, such as Figure 1 As shown, the drive mechanism 40 includes an electromagnetic component 41 and a reset component 42; when the electromagnetic component 41 is energized, it drives the synchronizer 311 to move relative to the gear ring 321 in a first direction through magnetic drive; the reset component 42 drives the synchronizer 311 to move relative to the gear ring 321 in a second direction; wherein the first direction and the second direction are opposite.

[0048] Specifically, the first direction can be the direction of movement from the disconnected position to the engaged position, or it can be the direction of movement from the engaged position to the disconnected position. The reset member 42 can also be an electromagnetic member 41, or it can be a member including an elastic structure. When the electromagnetic member 41 is not energized and has no magnetic force, the synchronizer 311 moves through elasticity. The reset member 42 can also be a motor drive member, etc.

[0049] Furthermore, in one specific embodiment, the electromagnetic component 41 includes an electromagnetic ring, which is sleeved on the outer periphery of the synchronizer 311 and located at one end near the engagement gear ring 321; and the first direction is the movement direction from the disconnected position to the engaged position.

[0050] The disconnection mechanism 30 and the drive mechanism 40 are arranged radially along the differential housing 21 and outside the end of the planetary carrier 11, which further reduces the axial space occupied, is beneficial to the overall vehicle layout, makes the assembly structure more compact, and improves the vehicle's range.

[0051] In one specific embodiment, the reset member 42 includes a plurality of springs arranged circumferentially along the synchronizer 311, such as Figure 1 and Figure 4As shown, in the reset component 42, one end of each spring is fixedly connected to the end of the synchronizer 311 away from the engagement gear ring 321, and the other end of each spring is fixedly connected to the other end of the transmission mechanism 10 (the end of the planetary carrier 11 in the figure). The other end of each spring can also be fixedly connected to the differential housing 21 (not shown in the figure); and when the synchronizer 311 is in the engagement position, each spring is in a stretched state.

[0052] Specifically, such as Figure 1 and Figure 4 As shown, the end of the planetary carrier 11 can be configured to match the synchronizer 311, so that the part of the end of the planetary carrier 11 connected to the synchronizer 311 is thinner, while other parts are thicker. In addition, a boss extending in the direction away from the differential housing 21 is provided at the position of other parts near the synchronizer 311, so that the part of the end of the planetary carrier 11 connected to the synchronizer 311 forms a transverse L-shaped cross section. A baffle 421 is fixedly provided at the end of the part connected to the synchronizer 311. The baffle 421 abuts against the side where the boss is provided. One end of each spring is fixedly connected to the end of the synchronizer 311 away from the engagement gear ring 321, and the other end of each spring is fixedly connected to the baffle 421.

[0053] When the electromagnetic component 41 is energized, it generates a magnetic force. This magnetic force drives the synchronizer 311 located on the planetary carrier 11 to move axially along the differential housing 21 to the engagement gear ring 321, where it meshes with the engagement gear ring 321. This enables the transmission of power from the planetary carrier 11 to the differential housing 21. Specifically, as follows... Figure 2 As shown by the dashed arrow, the motor's power is transmitted from the sun gear 13 to the driven planetary gear 14, then to the driving planetary gear 15 and the planet carrier 11, and further through the synchronizer 311 and the engagement ring gear 321 to the differential housing 21. From there, it is transmitted sequentially through the planetary shaft 22, planetary gear 23, and half-shaft gear 24 in the differential 20 to the half-shaft. When the electromagnetic component 41 is disconnected from the power supply, the magnetic force disappears, and the synchronizer 311 disengages from the engagement ring gear 321 under the action of multiple springs in the reset component 42. Specifically, as shown... Figure 3 As shown by the dashed arrow, the half-shaft rotates with the wheel, and the half-shaft transmits torque to the half-shaft gear 24, which in turn causes the planetary gear 23 and the differential housing 21 to rotate. Since the driving member 31 and the driven member 32 are separated, the differential housing 21 is disconnected from the transmission mechanism 10, and the torque of the wheel is no longer transmitted. Furthermore, the differential 20 rotates as a whole, and the speed difference between the differential 20 and the planetary carrier 11 is eliminated through the needle roller bearing between the inner wall of the end of the planetary carrier 11 and the outer wall of the differential housing 21, changing the sliding friction to rolling friction.

[0054] Example 2

[0055] This utility model also provides an automobile, including the reducer assembly provided in Embodiment 1. Specifically, the drive mechanism in the reducer assembly can be connected to a relevant controller in the automobile. When the controller determines that the drive motor is not working, it controls the drive mechanism to drive the active member of the disconnect mechanism to move to the disconnect position. For the electromagnetic drive mechanism, it de-energizes it, causing the active member and driven member to separate, cutting off the power transmission between the transmission mechanism and the differential housing. When the controller determines that the drive motor is working again, it controls the drive mechanism to drive the active member of the disconnect mechanism to move to the engagement position. For the electromagnetic drive mechanism, it energizes it, causing the active member and driven member to connect. The power transmitted by the transmission mechanism is transmitted sequentially through the active member and driven member to the differential housing, and further through the planetary shaft, planetary gears, and half-shaft gears to the half-shafts and wheels.

[0056] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0057] It should be noted that similar reference numerals and letters in this specification are similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0058] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0059] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0060] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0061] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A reducer assembly comprising a transmission mechanism, a differential, and a disconnect mechanism, the differential comprising a differential housing, one end of the transmission mechanism being configured to be drivingly connected to a motor to transmit power from the motor, characterized in that, The disconnection mechanism is disposed between the other end of the transmission mechanism and the differential housing, and includes: A driving element, which is connected to the other end of the transmission mechanism in a driving manner; Driven component, the driven component being drively connected to the differential housing; The reducer assembly further includes a drive mechanism for driving the driving member to move relative to the driven member between an engaged position and a disengaged position; wherein When the active component is in the engaged position, it is engaged with and driven by the driven component, so that the power transmitted by the transmission mechanism is transmitted sequentially through the active component and the driven component to the differential housing. When the drive member is in the disconnected position, it separates from the driven member to cut off the power transmission between the transmission mechanism and the differential housing.

2. The reducer assembly of claim 1, wherein, The transmission mechanism includes a planetary gear transmission assembly, which includes a planet carrier; wherein, the end of the planet carrier constitutes the other end of the transmission mechanism and is connected to the driving element in a transmission connection.

3. The reducer assembly of claim 2, wherein, The driven component includes a gear ring, which is sleeved on the outer periphery of the differential housing and fixedly connected to the differential housing; The driving component includes a synchronizer, which is sleeved on the outer periphery of the differential housing and positioned on the side of the engagement gear ring near the planetary gear transmission assembly. The drive mechanism is used to drive the synchronizer to move relative to the engagement gear ring along the axial direction of the differential housing between the engagement position and the disengagement position. When the synchronizer is in the engagement position, the synchronizer engages with the engagement gear ring; When the synchronizer is in the disconnected position, the synchronizer is separated from the engagement gear ring.

4. The reducer assembly of claim 3, wherein, The planetary gear transmission assembly is arranged axially along the differential housing; in The end of the planetary carrier is located on the outer periphery of the differential housing, and the inner wall of the end of the planetary carrier is rotatably connected to the outer wall of the differential housing. The outer wall of the end of the planetary carrier is movably connected to the inner wall of the synchronizer along the axial direction of the differential housing and is also circumferentially connected to the differential housing.

5. The reducer assembly as described in claim 4, characterized in that, The inner wall of the end of the planetary carrier is connected to the outer wall of the differential housing via a needle roller bearing, and the outer wall of the end of the planetary carrier is connected to the inner wall of the synchronizer via a spline.

6. The reducer assembly as described in claim 4, characterized in that, The planetary gear transmission assembly further includes a sun gear shaft, a sun gear, a driven planetary gear, and a driving planetary gear, which are arranged axially along the differential housing and sequentially connected in a transmission manner; wherein The end of the planetary carrier furthest from the synchronizer is located on the outer periphery of the input end of the sun gear shaft, and a bearing is provided between the planetary carrier and the sun gear shaft. The end of the planetary carrier passes through the driven planetary gear and the driving planetary gear in sequence and is located on the outer periphery of the differential housing.

7. The reducer assembly as described in any one of claims 3-6, characterized in that, The drive mechanism includes an electromagnetic component and a reset component; the electromagnetic component magnetically drives the synchronizer to move relative to the engagement gear ring along a first direction. The reset component drives the synchronizer to move relative to the engagement gear ring in a second direction; in The first direction and the second direction are opposite.

8. The reducer assembly as described in claim 7, characterized in that, The electromagnetic component includes an electromagnetic ring, which is sleeved on the outer periphery of the synchronizer and located at one end near the engaging gear ring; and The first direction is the direction of movement from the disconnected position to the joined position.

9. The reducer assembly as described in claim 8, characterized in that, The reset component includes a plurality of springs arranged circumferentially along the synchronizer. One end of each spring is fixedly connected to the end of the synchronizer away from the engagement gear ring, and the other end of each spring is fixedly connected to the other end of the transmission mechanism or the differential housing. When the synchronizer is in the engagement position, each spring is in a stretched state.

10. A car, characterized in that, Includes the reducer assembly as described in any one of claims 1-9.

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