Gear assembly and vehicle

Abstract

The utility model discloses a gear assembly and a vehicle, and belongs to the technical field of transmission parts, the gear assembly comprises a body and a damping part, the body comprises a first connecting part, a second connecting part and a third connecting part, the third connecting part is arranged around the first connecting part, the second connecting part is arranged between the first connecting part and the third connecting part, and the damping part is arranged between the first connecting part and the third connecting part. The first connecting part and the third connecting part are respectively connected; the vibration reduction part is arranged between the first connecting part and the third connecting part and comprises a supporting part and a noise reduction part, the supporting part is connected with the second connecting part, and the noise reduction part is connected to the side, away from the second connecting part, of the supporting part. By arranging the supporting part, the size of the gear assembly at the second connecting part in the axial direction can be increased, so that the supporting rigidity of the gear is improved, the gear meshing dislocation amount caused by insufficient rigidity of the gear body is reduced, and therefore the possibility that the gear generates noise in the working process is reduced. In addition, vibration transmission and noise radiation of the gear can be further reduced by arranging the noise reduction part.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of transmission members, and particularly relates to a gear assembly and a vehicle. BACKGROUND

[0002] Gears need to be engaged to perform power transmission, speed change and torque change.

[0003] However, vibration is generated in the process of gear engagement, and the generated vibration can cause medium-high frequency noise that is easily recognized by human ears. When the gear is applied to a vehicle, the quietness of the vehicle is affected. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a gear assembly for solving the technical problem of gear noise, and another object of the application is to provide a vehicle.

[0005] The technical scheme, the application provides a gear assembly, which comprises:

[0006] A body, the body comprises a first connecting part, a second connecting part and a third connecting part, the third connecting part is arranged around the first connecting part, the second connecting part is arranged between the first connecting part and the third connecting part, and the first connecting part and the third connecting part are connected respectively;

[0007] A damping member, the damping member is arranged between the first connecting part and the third connecting part, the damping member comprises a supporting part and a noise reduction part, the supporting part is connected with the second connecting part, and the noise reduction part is connected to one side of the supporting part away from the second connecting part.

[0008] In some embodiments, the gear assembly further comprises a connecting layer, the connecting layer is arranged between the supporting part and the second connecting part, and the supporting part and the second connecting part are connected respectively.

[0009] In some embodiments, the supporting part is arranged around the first connecting part, and the noise reduction part is arranged around the mounting hole.

[0010] In some embodiments, the supporting part has a first through hole, the noise reduction part has a second through hole, and the first connecting part is arranged in the first through hole and the second through hole.

[0011] In some embodiments, the damping member further comprises a covering part, the covering part is connected to one side of the noise reduction part away from the supporting part.

[0012] In some embodiments, the body has a recess, the first connecting part, the second connecting part and the third connecting part enclose the recess, and the damping member is arranged in the recess; the gear assembly comprises a limiting member, part of the limiting member is arranged in the recess, and the limiting member is connected with the first connecting part and / or the third connecting part, and the limiting member is connected to one side of the covering part away from the noise reduction part.

[0013] In some embodiments, the limiting member comprises a first limiting member, the first connecting part has a first limiting slot towards the third connecting part, the first limiting slot communicates with the recess, and the first limiting member is arranged in the first limiting slot.

[0014] In some embodiments, the limiting member comprises a second limiting member, the third connecting part has a second limiting slot towards the first connecting part, the second limiting slot communicates with the recess, and the second limiting member is arranged in the second limiting slot.

[0015] In some embodiments, the second connecting part has a connecting surface, and the supporting part is attached to and connected with the connecting surface;

[0016] In the direction from the covering part to the noise reduction part, the noise reduction part is located within the projection of the covering part on the plane of the connecting surface.

[0017] Correspondingly, the application also provides a vehicle comprising the gear assembly according to any one of the above embodiments.

[0018] Advantages: Compared with the prior art, the gear assembly provided by the embodiments of the application comprises a body and a damping member, the body comprises a first connecting part, a second connecting part and a third connecting part, the third connecting part is arranged around the first connecting part, the second connecting part is arranged between the first connecting part and the third connecting part and connected with the first connecting part and the third connecting part respectively; the damping member is arranged between the first connecting part and the third connecting part, and the damping member comprises a supporting part and a noise reduction part, the supporting part is connected with the second connecting part, and the noise reduction part is connected to one side of the supporting part away from the second connecting part. The application can increase the size of the gear assembly in the axial direction at the second connecting part by arranging the supporting part, so as to improve the support stiffness of the gear, reduce the gear meshing misalignment caused by insufficient stiffness of the gear body, and thus reduce the possibility of noise generated by the gear in operation. In addition, the noise reduction part can also absorb the vibration generated by the gear meshing excitation, attenuate the energy of the gear vibration, and further reduce the vibration transmission and noise radiation of the gear. BRIEF DESCRIPTION OF DRAWINGS

[0019] The technical solutions and other advantages of the application will be apparent to those skilled in the art from the following detailed description of the specific embodiments of the application, combined with the accompanying drawings.

[0020] Figure 1 An exploded schematic view of a gear assembly provided for an embodiment of the present application;

[0021] Figure 2 A side view of a gear assembly provided for an embodiment of the present application;

[0022] Figure 3 A cross-sectional view of a gear assembly provided for an embodiment of the present application;

[0023] Figure 4 A detail view of circle A in Figure 3

[0024] Figure 5 A cross-sectional view of a body in a gear assembly provided for an embodiment of the present application;

[0025] Figure 6 A detail view of circle B in Figure 5

[0026] A detail view of circle B in Figure 7 Figure 5 A detail view of circle B in another embodiment.

[0027] Reference signs, 100 - body, 110 - first connecting part, 111 - mounting hole, 112 - first limiting groove, 120 - second connecting part, 121 - connecting surface, 130 - third connecting part, 131 - second limiting groove, 140 - groove, 200 - damping member, 210 - supporting part, 211 - first through hole, 220 - noise reduction part, 221 - second through hole, 230 - covering part, 300 - connecting layer, 400 - limiting member, 410 - first limiting member, 420 - second limiting member, X - axial direction. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] ​​In the description of the present application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited. In addition, the terms "first", "second" are for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0031] Gears need to be engaged for power transmission, gear shifting, and torque conversion.

[0032] However, vibration will be generated during the engagement of the gears, and the generated vibration will cause medium-high frequency noise that can be easily recognized by the human ear. When the gears are applied to vehicles, the quietness of the vehicle will be affected.

[0033] As the main noise source of electric vehicles, the reducer becomes one of the key factors to improve the sound quality of the whole vehicle by strict noise control. Gear whine is the main form of reducer noise, and whine noise is a kind of medium-high frequency noise caused by the vibration excitation of the internal gear of the reducer during the engagement of the transmission, which is a kind of medium-high frequency pure tone that can be easily recognized by the human ear. User complaints are relatively high and must be reduced or eliminated. Compared with traditional fuel vehicles, the "masking effect" of the engine assembly is missing in electric vehicles, and the background noise is smaller, which puts higher requirements and challenges on the noise control of the reducer.

[0034] Specifically, the reducer howling noise is the rigid-flexible coupling response of the gear box elastic system under the action of dynamic excitation load. Due to the fluctuation of transmission error caused by the continuous change of meshing stiffness in the process of gear meshing, it directly leads to the fluctuation of gear loaded contact force as a kind of dynamic excitation source. The fluctuation of contact force excites internal structure vibration, part of which is transmitted to the vehicle interior through shaft, bearing, reducer shell, suspension and vehicle body and other components, and another part generates radiation noise through the thin-walled parts on the shell. When the shell modal frequency of the reducer and the excitation frequency of the gear are the same, resonance occurs, and the howling noise is more obvious.

[0035] To solve the above technical problem that the gear generates noise in the working process, the first embodiment of the present application provides a gear assembly, please refer to Figure 1 、 Figure 3 and Figure 4 The gear assembly comprises a body 100 and a damping piece 200, the body 100 comprises a first connecting part 110, a second connecting part 120 and a third connecting part 130, the third connecting part 130 is arranged around the first connecting part 110, the second connecting part 120 is arranged between the first connecting part 110 and the third connecting part 130 and connects the first connecting part 110 and the third connecting part 130 respectively; the damping piece 200 is arranged between the first connecting part 110 and the third connecting part 130, the damping piece 200 comprises a supporting part 210 and a noise reduction part 220, the supporting part 210 is connected with the second connecting part 120, and the noise reduction part 220 is connected to the side of the supporting part 210 away from the second connecting part 120.

[0036] Among some embodiments, the body 100 has a spoke, and the second connecting part 120 is the spoke of the body 100.

[0037] Specifically, the gear assembly has an axis and an axial direction X, the axial direction X is the direction indicated by the arrow X in the drawing, and the gear assembly can rotate around the axis.

[0038] Specifically, the damping piece 200 is connected with the second connecting part 120 along the axial direction XX.

[0039] In some embodiments, the gear assembly comprises two damping pieces 200, and the two damping pieces 200 are respectively connected to the two sides of the second connecting part 120 along the axial direction XX.

[0040] In some embodiments, the noise reduction part 220 is made of a material capable of producing elastic deformation.

[0041] The material of the noise reduction part 220 comprises reticular polymer, rubbery random polymer and glassy random polymer, so as to be able to eliminate different frequencies of noise generated at different temperatures.

[0042] In some embodiments, the support portion 210 is made of a steel plate.

[0043] In the above embodiments, the support portion 210 in the damping member 200 can increase the size of the gear assembly along the axial direction X at the second connecting portion 120, so as to improve the support stiffness of the gear, reduce the amount of gear meshing misalignment caused by insufficient stiffness of the gear body 100, and thus reduce the possibility of noise generated by the gear in operation. In addition, by providing the noise reduction portion 220, the vibration generated by the gear meshing excitation can also be absorbed, and the energy of the gear vibration can be attenuated, further reducing the vibration transmission and noise radiation of the gear.

[0044] In some embodiments, referring to Figure 7 , the gear assembly further comprises a connecting layer 300, which is arranged between the support portion 210 and the second connecting portion 120 and connects the support portion 210 and the second connecting portion 120, respectively.

[0045] In some embodiments, the connecting layer 300 is an adhesive, and by providing the connecting layer 300, the damping member 200 can be adhered to the second connecting portion 120, so as to fix the damping member 200.

[0046] In the above embodiments, by providing the connecting layer 300, the damping member 200 can be connected with the second connecting portion 120, so as to realize the connection between the damping member 200 and the body 100. In addition, in other embodiments, the body 100 has a groove 140, and the damping member 200 needs to be placed in the groove 140 before being further fixed. The connecting layer 300 can preliminarily fix the damping member 200, thereby reducing the difficulty of further fixing the damping member 200 and the body 100.

[0047] In some embodiments, referring to Figure 1 and Figure 3 , the support portion 210 is arranged around the first connecting portion 110, and the noise reduction portion 220 is arranged around the first connecting portion 110.

[0048] In some embodiments, the first connecting portion 110 has a first mounting hole 111, and the damping member 200 surrounds the first mounting hole 111.

[0049] In some embodiments, the damping member 200 comprises a plurality of support portions 210, which are arranged at intervals along the circumference of the first connecting portion 110 and surround the first connecting portion 110. Specifically, the plurality of support portions 210 are arranged around the axis.

[0050] In some embodiments, the damping member 200 comprises a plurality of noise reduction portions 220, the plurality of noise reduction portions 220 are arranged along the circumference of the first connecting portion 110, and the plurality of noise reduction portions 220 surround the first connecting portion 110. Specifically, the plurality of noise reduction portions 220 surround the axis.

[0051] In some embodiments, along the axial direction X, the normal projection of the noise reduction portion 220 on the plane of the connecting surface 121 of the second connecting portion 120 is located within the normal projection of the supporting portion 210 on the plane of the connecting surface 121 of the second connecting portion 120, so as to avoid the connecting layer 300 contacting the noise reduction portion 220, and to reduce the probability of lubricating oil used for lubricating the gear entering between the second connecting portion 120 and the noise reduction portion 220, reduce the damage of the noise reduction portion 220 by the lubricating oil, and prolong the service life of the gear assembly.

[0052] In the above embodiments, by arranging the supporting portion 210 surrounding the first connecting portion 110, the minimum thickness of the body 100 along the axial direction X is increased as much as possible, so as to reduce the gear meshing misalignment amount caused by insufficient stiffness of the gear body 100, and further reduce the possibility of noise generated by the gear in operation. In addition, by arranging the noise reduction portion 220 surrounding the first connecting portion 110, the area of the noise reduction portion 220 can be as large as possible, so as to improve the noise reduction effect of the noise reduction portion 220.

[0053] In some embodiments, referring to Figure 4 , the supporting portion 210 has a first through hole 211, the noise reduction portion 220 has a second through hole 221, and the first connecting portion 110 passes through the first through hole 211 and the second through hole 221.

[0054] In the above embodiments, by arranging the first through hole 211 on the supporting portion 210, the supporting portion 210 can be sleeved on the first connecting portion 110, so as to allow the area of the supporting portion 210 to be as large as possible, and further improve the supporting effect of the supporting portion 210 on the second connecting portion 120, so as to improve the stiffness of the body 100, reduce the gear meshing misalignment amount caused by insufficient stiffness of the gear body 100, and further reduce the possibility of noise generated by the gear in operation. By arranging the second through hole 221 on the noise reduction portion 220, the noise reduction portion 220 can be sleeved on the first connecting portion 110, so as to allow the area of the noise reduction portion 220 to be as large as possible, and further improve the noise reduction effect of the noise reduction portion 220.

[0055] In some embodiments, referring to Figure 4 , the damping member 200 further comprises a covering portion 230, and the covering portion 230 is connected to the side of the noise reduction portion 220 away from the supporting portion 210.

[0056] In some embodiments, the noise reduction part 220 is made of common rubber, which can be aged and decomposed after long-term immersion in lubricating oil used for lubricating the gear, resulting in damage to the vibration damper 200.

[0057] In the above embodiments, the noise reduction part 220 in the vibration damper 200 including the covering part 230 is covered by the supporting part 210 and the covering part 230 along the axial direction X, respectively, thereby reducing the possibility of the two sides of the noise reduction part 220 along the axial direction X contacting the lubricating oil used for lubricating the gear, thereby prolonging the service life of the noise reduction part 220.

[0058] In some embodiments, referring to Figure 1 , Figure 2 and Figure 4 , the body 100 has a groove 140, the first connecting part 110, the second connecting part 120, and the third connecting part 130 surround the groove 140, and the vibration damper 200 is arranged in the groove 140; the gear assembly includes a limiting part 400, part of the limiting part 400 is arranged in the groove 140 and connected with the first connecting part 110 and / or the third connecting part 130, and the limiting part 400 is connected to the side of the covering part 230 away from the noise reduction part 220.

[0059] In some embodiments, the limiting part 400 is only connected with the first connecting part 110; in some embodiments, the limiting part 400 is only connected with the third connecting part 130; in some embodiments, the limiting part 400 is connected with the first connecting part 110 and the third connecting part 130 at the same time; in some embodiments, the limiting part 400 has multiple, part of which is connected with the first connecting part 110 and part of which is connected with the third connecting part 130.

[0060] In the above embodiment set, by arranging the limiting part 400 on the side of the covering part 230 away from the second connecting part 120 to limit the vibration damper 200 along the axial direction, the possibility of the vibration damper 200 separating from the body 100 is reduced, and the use reliability of the gear assembly is improved. In addition, by arranging the covering part 230, the limiting part 400 can also avoid directly contacting the noise reduction part 220, reducing the damage of the noise reduction part 220 by the limiting part 400, thereby reducing the noise reduction effect of the vibration damper 200.

[0061] In some embodiments, referring to Figure 1 , Figure 2 and Figure 4 , the limiting part 400 includes a first limiting part 410, the first connecting part 110 has a first limiting groove 112 facing the third connecting part 130, the first limiting groove 112 communicates with the groove 140, and the first limiting part 410 is arranged in the first limiting groove 112.

[0062] In some embodiments, the first limiting part 410 is a circlip.

[0063] In some embodiments, the first limiting groove 112 is arranged around the first connecting portion 110.

[0064] In the above embodiments, the first limiting groove 112 is arranged such that the first limiting member 410 is arranged in the first limiting groove 112, so that the groove wall of the first limiting groove 112 can abut against the first limiting member 410 along the axial direction X, thereby limiting the first limiting member 410 along the axial direction X. The portion of the first limiting member 410 close to the axis is arranged in the first limiting groove 112, and the portion of the first limiting member 410 away from the first connecting portion 110 is exposed to the first limiting groove 112 and can contact the covering portion 230 along the axial direction X, thereby limiting the damping member 200 along the axial direction X.

[0065] In some embodiments, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the limiting member 400 includes a second limiting member 420, the third connecting portion 130 has a second limiting groove 131 facing the first connecting portion 110, the second limiting groove 131 is in communication with the groove 140, and the second limiting member 420 is arranged in the second limiting groove 131.

[0066] In some embodiments, the second limiting member 420 is also a circlip.

[0067] In some embodiments, the second limiting groove 131 is arranged along the circumference of the third connecting portion 130.

[0068] In the above embodiments, the second limiting groove 131 is arranged such that the second limiting member 420 is arranged in the second limiting groove 131, so that the groove wall of the second limiting groove 131 can abut against the second limiting member 420 along the axial direction X, thereby limiting the second limiting member 420 along the axial direction X. The portion of the second limiting member 420 away from the first connecting portion 110 is arranged in the second limiting groove 131, and the portion of the second limiting member 420 close to the first connecting portion 110 is exposed to the second limiting groove 131 and can contact the covering portion 230 along the axial direction X, thereby limiting the damping member 200 along the axial direction X.

[0069] In some embodiments, the gear assembly includes the first limiting member 410 and the second limiting member 420, so as to be able to limit the outer side and the inner side of the damping member 200 at the same time, thereby improving the effect of limiting the damping member 200 along the axis.

[0070] In the installation process of the damping member 200, the connecting layer 300 is coated on the side of the support part 210 away from the noise reduction part 220, and then the damping member 200 is placed in the groove 140 with the support part 210 facing the second connecting part 120. Then the damping member 200 is pressed towards the second connecting part 120 by a pressing machine. When the connecting layer 300 connects the second connecting part 120 and the support part 210, the first limiting part 410 is arranged in the first limiting groove 112, and the second limiting part 420 is arranged in the second limiting groove 131, so as to complete the installation of the damping member 200.

[0071] In some embodiments, the second connecting part 120 is provided with the damping member 200 on both sides in the axial direction X, the first connecting part 110 is provided with two first limiting grooves 112 spaced apart in the axial direction X, and the two first limiting grooves 112 are arranged on both sides of the second connecting part 120, so that the gear assembly can be provided with two first limiting parts 410 which can limit the damping members 200 on both sides of the second connecting part 120 in the axial direction X respectively; the third connecting part 130 is provided with two second limiting grooves 131 spaced apart in the axial direction X, and the two second limiting grooves 131 are arranged on both sides of the second connecting part 120, so that the gear assembly can be provided with two second limiting parts 420 which can limit the damping members 200 on both sides of the second connecting part 120 in the axial direction X respectively.

[0072] In some embodiments, referring to Figure 1 , the second connecting part 120 has a connecting surface 121, and the support part 210 is attached to and connected to the connecting surface 121; in the direction from the covering part 230 to the noise reduction part 220, the noise reduction part 220 is located within the projection of the covering part 230 on the plane of the connecting surface 121.

[0073] Specifically, the direction from the covering part 230 to the noise reduction part 220 is the axial direction X.

[0074] The noise reduction part 220 is located within the projection of the covering part 230 on the plane of the connecting surface 121, which allows the side of the noise reduction part 220 away from the support part 210 to be located on one side of the covering part 230, so as to realize that the noise reduction part 220 is completely attached to the covering part 230.

[0075] In the above embodiments, by limiting the projection relationship between the noise reduction part 220 and the covering part 230, the covering part 230 can cover the noise reduction part 220 to the greatest extent, so as to reduce the possibility of damage to the noise reduction part 220 by lubricating oil, thereby prolonging the service life of the damping member 200.

[0076] In some embodiments, the support portion 210, the noise reduction portion 220 and the cover portion 230 are integrally formed by a welding spot. The two sides of the noise reduction portion 220 along the axial direction X are covered by the support portion 210 and the cover portion 230, reducing the possibility of direct contact with lubricating oil, not easy to age, and high reliability.

[0077] In some embodiments, the support portion 210, the noise reduction portion 220 and the cover portion 230 are parts of a mute steel plate.

[0078] Correspondingly, the application also provides a vehicle comprising the gear assembly according to any one of the above embodiments.

[0079] The above describes in detail a gear assembly and a vehicle provided by the embodiments of the application. The principles and implementation manners of the application are described by applying specific examples. The above description of the embodiments is only used to help understand the technical solutions of the application and the core ideas thereof. Those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced equivalently, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A gear assembly, characterized in that, include: The body (100) includes a first connecting part (110), a second connecting part (120) and a third connecting part (130), the third connecting part (130) being disposed around the first connecting part (110), and the second connecting part (120) being disposed between the first connecting part (110) and the third connecting part (130) and respectively connecting the first connecting part (110) and the third connecting part (130); A vibration damper (200) is disposed between the first connecting portion (110) and the third connecting portion (130). The vibration damper (200) includes a support portion (210) and a noise reduction portion (220). The support portion (210) is connected to the second connecting portion (120), and the noise reduction portion (220) is connected to the side of the support portion (210) away from the second connecting portion (120).

2. The gear assembly according to claim 1, characterized in that, The gear assembly further includes a connecting layer (300) disposed between the support portion (210) and the second connecting portion (120), and connecting the support portion (210) and the second connecting portion (120) respectively.

3. The gear assembly according to claim 1, characterized in that, The support portion (210) is arranged around the first connecting portion (110), and the noise reduction portion (220) is arranged around the first connecting portion (110).

4. The gear assembly according to claim 3, characterized in that, The support part (210) has a first through hole (211), the noise reduction part (220) has a second through hole (221), and the first connecting part (110) passes through the first through hole (211) and the second through hole (221).

5. The gear assembly according to claim 1, characterized in that, The vibration damper (200) also includes a cover (230) connected to the side of the noise reduction part (220) away from the support part (210).

6. The gear assembly according to claim 5, characterized in that, The body (100) has a groove (140), the first connecting part (110), the second connecting part (120) and the third connecting part (130) surround the groove (140), and the vibration damping member (200) is disposed in the groove (140); the gear assembly includes a limiting member (400), a portion of the limiting member (400) is disposed in the groove (140) and connected to the first connecting part (110) and / or the third connecting part (130), and the limiting member (400) is connected to the side of the covering part (230) away from the noise reduction part (220).

7. The gear assembly according to claim 6, characterized in that, The limiting member (400) includes a first limiting member (410), the first connecting portion (110) has a first limiting groove (112) facing the third connecting portion (130), the first limiting groove (112) communicates with the groove (140), and the first limiting member (410) is disposed in the first limiting groove (112).

8. The gear assembly according to claim 6, characterized in that, The limiting member (400) includes a second limiting member (420), and the third connecting part (130) has a second limiting groove (131) facing the first connecting part (110). The second limiting groove (131) communicates with the groove (140), and the second limiting member (420) is disposed in the second limiting groove (131).

9. The gear assembly according to claim 5, characterized in that, The second connecting part (120) has a connecting surface (121), and the supporting part (210) is attached to and connected to the connecting surface (121); Along the direction from the covering part (230) to the noise reduction part (220), the orthographic projection of the noise reduction part (220) onto the plane where the connecting surface (121) is located is within the orthographic projection of the covering part (230) onto the plane where the connecting surface (121) is located.

10. A vehicle, characterized in that, Includes the gear assembly as described in any one of claims 1 to 9.

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