Swing arm assembly, suspension system and vehicle

Abstract

The utility model discloses a swing arm assembly, a suspension system and a vehicle. The swing arm assembly is applied to the suspension system, the suspension system comprises a steering knuckle, the swing arm assembly comprises a swing arm body, a fixing piece and a nut, the swing arm body comprises a mounting part and a protruding part, the mounting part is provided with a mounting hole penetrating through the surfaces of the two opposite sides of the mounting part, the protruding part is arranged on the mounting part in a protruding mode, and the nut is arranged in the mounting hole in the radial direction of the mounting hole. The lug boss and the mounting hole are arranged at an interval, and the lug boss is provided with a clamping surface facing the mounting hole; the fixing piece is used for being connected with the steering knuckle and comprises a flange part and an extending part which are connected with each other, the extending part penetrates through the mounting hole, and the flange part abuts against the surface of the side, away from the protruding part, of the mounting part; the nut is arranged on the extension part in a sleeving mode and makes contact with the side, away from the flange part, of the installation part, the nut is provided with a matching face, and at least part of the matching face abuts against the clamping face so that the nut can be limited in the circumferential direction of the installation hole. Therefore, the risk that the nut rotates along with the fixing piece is reduced, and the assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a swing arm assembly, a suspension system and a vehicle. BACKGROUND

[0002] With the continuous development of vehicle technology, multi-link suspension systems are becoming more and more popular. In the process of assembling the multi-link suspension system, problems such as nuts following the rotation of the fixing member are prone to occur. However, due to the limited arrangement space of the multi-link suspension system, it is difficult to effectively limit the nuts, thereby resulting in low assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a swing arm assembly, a suspension system and a vehicle, which aims to solve the above technical problems existing in the prior art.

[0004] To solve the above problems, the present application provides a swing arm assembly, which is applied to a suspension system. The suspension system comprises a knuckle, and the swing arm assembly comprises a swing arm body, a fixing member and a nut. The swing arm body comprises a mounting portion and a protruding portion. The mounting portion is provided with a mounting hole penetrating through the opposite surfaces of the mounting portion. The protruding portion is protrudingly arranged on the mounting portion, and in the radial direction of the mounting hole, the protruding portion is arranged in a spaced manner with the mounting hole. The protruding portion has a clamping surface facing the mounting hole. The fixing member is used for connecting with the knuckle. The fixing member comprises a flange portion and an extension portion connected with each other. The extension portion is arranged in the mounting hole, and the flange portion is in abutment with the side surface of the mounting portion away from the protruding portion. The nut is sleeved on the extension portion and in contact with the side of the mounting portion away from the flange portion. The nut has a matching surface, and at least part of the matching surface is in abutment with the clamping surface to limit the nut in the circumferential direction of the mounting hole.

[0005] In some embodiments, in the opening direction of the mounting hole, the height dimension of the clamping surface is greater than the height dimension of the matching surface.

[0006] In some embodiments, the height dimension of the matching surface is greater than or equal to 5mm and less than or equal to 10mm.

[0007] In some embodiments, the number of matching surfaces is multiple, and the multiple matching surfaces are connected in sequence. At least part of one of the multiple matching surfaces is in abutment with the clamping surface.

[0008] In some embodiments, the number of matching surfaces is four.

[0009] In some embodiments, the mounting portion comprises a first portion and a second portion arranged in a spaced manner in the opening direction of the mounting hole. The first portion forms a first hole segment of the mounting hole, and the second portion forms a second hole segment of the mounting hole. The extension portion is interposed between the first hole segment and the second hole segment, and part of the extension portion is exposed between the first portion and the second portion. The knuckle is connected with the part of the extension portion exposed between the first portion and the second portion.

[0010] In some embodiments, the protruding portion is located on one side of one of the first portion and the second portion away from the other.

[0011] In some embodiments, the protruding portion is integrally formed with the mounting portion.

[0012] To solve the above problems, the application provides a suspension system, which comprises a knuckle and the swing arm assembly.

[0013] To solve the above problems, the application provides a vehicle, which comprises the suspension system.

[0014] Compared with the prior art, the swing arm assembly provided by the application is applied to a suspension system, the suspension system comprises a knuckle, and the swing arm assembly comprises a swing arm body, a fixing piece and a nut. The swing arm body comprises a mounting portion and a protruding portion. The mounting portion is provided with a mounting hole penetrating through the opposite surfaces of the mounting portion. The protruding portion is protrudingly arranged on the mounting portion and is spaced apart from the mounting hole in the radial direction of the mounting hole. The protruding portion has an abutting surface facing the mounting hole. The fixing piece is used for being connected with the knuckle. The fixing piece comprises a flange portion and an extension portion connected with each other. The extension portion is arranged in the mounting hole. The flange portion is in abutment with the side surface of the mounting portion away from the protruding portion. The nut is sleeved on the extension portion and is in contact with the side of the mounting portion away from the flange portion. The nut has a matching surface. The matching surface is at least partially in abutment with the abutting surface to limit the nut in the circumferential direction of the mounting hole. Through the above-mentioned implementation, the abutting surface of the protruding portion can be in abutment with the matching surface of the nut, so as to limit the nut in the circumferential direction of the mounting hole, thereby relieving the risk that the nut is rotated in the circumferential direction of the mounting hole under the driving of the fixing piece, improving the assembly efficiency, and at the same time, the structure is simple and space-saving. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0016] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the application;

[0017] Figure 2 is a first structural schematic diagram of a suspension assembly according to one or more embodiments of the application;

[0018] Figure 3 is a second structural schematic diagram of a suspension assembly according to one or more embodiments of the application;

[0019] Figure 4 is a first structural schematic view of a swing arm assembly according to one or more embodiments of the present application;

[0020] Figure 5 is a second structural schematic view of a swing arm assembly according to one or more embodiments of the present application.

[0021] Reference signs: vehicle 1; suspension system 2; swing arm assembly 100; knuckle 200; swing arm body 10; mounting portion 11; first portion 111; second portion 112; mounting hole 113; first hole section 1131; second hole section 1132; protrusion portion 12; locking surface 121; fixing member 20; flange portion 21; extension portion 22; nut 30; mating surface 31; radial direction x1; hole opening direction x2. DETAILED DESCRIPTION

[0022] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims and the aforementioned description of the drawings, are intended to cover not exclusive inclusion.

[0024] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0025] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0027] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0028] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0029] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be 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 embodiments of the present application can be understood according to the specific circumstances.

[0030] With the continuous development of vehicle technology, multi-link suspension system is more and more popular, in the process of assembling multi-link suspension system, nut is easy to rotate with the fixed part, however, due to the limited space of multi-link suspension system, it is difficult to effectively limit the nut, thereby reducing the assembly efficiency.

[0031] The present application provides a vehicle, please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.

[0032] The vehicle 1 comprises a suspension system 2, and the vehicle 1 can be a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle, etc. The vehicle 1 can be a front-wheel drive vehicle, a four-wheel drive vehicle, etc. The vehicle 1 is provided with the suspension system 2, which can be used to buffer the road impact, and at the same time help to accurately control the wheel movement to realize the dynamic balance of the vehicle 1 handling stability and ride comfort.

[0033] In combination Figures 2-3 , Figure 2 is a first structural schematic diagram of a suspension assembly according to one or more embodiments of the present application; Figure 3 is a second structural schematic diagram of a suspension assembly according to one or more embodiments of the present application.

[0034] The present application also provides a suspension system 2, which comprises a knuckle 200 and a swing arm assembly 100, the swing arm assembly 100 is connected with the knuckle 200, the knuckle 200 can be used to connect the wheel components, suspension swing arm and other components, realize steering and carry the wheel positioning and load. The swing arm assembly 100 can be connected with the knuckle 200 and transmit the acting force, and be used to guide the movement track of the wheel.

[0035] In combination Figures 4-5 , Figure 4 is a first structural schematic diagram of a swing arm assembly according to one or more embodiments of the present application; Figure 5 is a second structural schematic diagram of a swing arm assembly according to one or more embodiments of the present application.

[0036] To solve the above problems, the present application provides a swing arm assembly 100, which is applied to a suspension system 2, the suspension system 2 comprises a knuckle 200, and the swing arm assembly 100 comprises a swing arm main body 10, a fixing piece 20 and a nut 30. The swing arm main body 10 comprises a mounting portion 11 and a protruding portion 12. The mounting portion 11 is provided with a mounting hole 113 penetrating through the opposite side surfaces of the mounting portion 11. The protruding portion 12 is protrudingly arranged on the mounting portion 11, and is arranged in a spaced manner with the mounting hole 113 in a radial direction x1 of the mounting hole 113. The protruding portion 12 has a clamping surface 121 facing the mounting hole 113. The fixing piece 20 is used to be connected with the knuckle 200, and comprises a flange portion 21 and an extension portion 22 connected with each other. The extension portion 22 is arranged in the mounting hole 113, and the flange portion 21 abuts against the side surface of the mounting portion 11 away from the protruding portion 12. The nut 30 is sleeved on the extension portion 22 and contacts with the side of the mounting portion 11 away from the flange portion 21. The nut 30 has a matching surface 31, which at least partially abuts against the clamping surface 121 to limit the nut 30 in the circumferential direction of the mounting hole 113.

[0037] The swing arm body 10 can be a suspension swing arm, wherein the suspension swing arm includes but is not limited to a rear lower swing arm. The mounting portion 11 is provided with a mounting hole 113 penetrating through the opposite surfaces of the mounting portion 11, and the mounting hole 113 can be used for inserting a fixing member 20. The fixing member 20 can be a bolt, a stud, a screw, or the like, but is not limited thereto. The fixing member 20 is used to connect with the knuckle 200, and the fixing member 20 includes a flange portion 21 and an extension portion 22 connected with each other. It can be understood that, in the process of mounting the fixing member 20, the extension portion 22 can be inserted into the mounting hole 113, and the flange portion 21 is in abutment with the side surface of the mounting portion 11 away from the protruding portion 12. Specifically, taking the fixing member 20 as a bolt as an example, the bolt can be inserted into the mounting hole 113 in the direction from the mounting portion 11 to the protruding portion 12. Specifically, the extension portion 22 is provided in the mounting hole 113, and an end of the extension portion 22 away from the flange portion 21 can protrude from the side of the mounting portion 11 away from the flange portion 21, so that the nut 30 is sleeved on the end of the extension portion 22 away from the flange portion 21. The protruding portion 12 is protrudingly arranged on the mounting portion 11 and is spaced apart from the mounting hole 113. It can be understood that, the protruding portion 12 is spaced apart from the mounting hole 113, so as to provide sufficient mounting space for the nut 30. Specifically, the nut 30 has a through hole for accommodating the fixing member 20, so that the nut 30 is sleeved on the fixing member 20 through the through hole. In the state that the through hole is in communication with the mounting hole 113, part of the radial dimension of the nut 30 can be located in the spacing space between the protruding portion 12 and the mounting hole 113, so as to facilitate the installation of the nut 30. It should be noted that, in the process of assembling the swing arm assembly 100, the nut 30 can be first brought into contact with the mounting portion 11, and the fitting surface 31 of the nut 30 is in abutment with the locking surface 121 of the protruding portion 12, wherein the through hole of the nut 30 is in communication with the mounting hole 113. Then, the extension portion 22 is inserted into the mounting hole 113 and the through hole of the nut 30 in sequence and is tightened. It can be understood that, since the fitting surface 31 of the nut 30 is at least partially in abutment with the locking surface 121, the nut 30 will not rotate with the fixing member 20 during the tightening process of the fixing member 20, thereby reducing the risk of rotation of the nut 30 in the circumferential direction of the mounting hole 113 under the driving of the fixing member 20.

[0038] According to the above embodiment, the locking surface 121 of the protruding portion 12 can be in abutment with the fitting surface 31 of the nut 30, so as to limit the nut 30 in the circumferential direction of the mounting hole 113, thereby reducing the risk of rotation of the nut 30 in the circumferential direction of the mounting hole 113 under the driving of the fixing member 20, improving the assembly efficiency, and saving space.

[0039] In some embodiments, the height dimension of the locking surface 121 is greater than the height dimension of the fitting surface 31 in the opening direction x2 of the mounting hole 113. In some application scenarios, the height dimension of the locking surface 121 can refer to the dimension between the surface of the protruding portion 12 away from the mounting portion 11 and the surface of the protruding portion 12 toward the locking surface 121. It can be understood that by setting the height dimension of the locking surface 121 of the protruding portion 12 to be greater than the height dimension of the fitting surface 31 of the nut 30, the contact stability between the locking surface 121 and the fitting surface 31 is improved, thereby enhancing the locking effect, further mitigating the risk of the nut 30 rotating under the driving of the fixing member 20, while reducing the assembly difficulty between the nut 30 and the protruding portion 12 and improving the assembly efficiency.

[0040] In some embodiments, the height dimension of the fitting surface 31 is greater than or equal to 5 mm and less than or equal to 10 mm. For example, the height dimension of the fitting surface 31 can be greater than or equal to 5 mm and less than or equal to 8 mm, or greater than or equal to 7 mm and less than or equal to 10 mm, and the like. Specifically, the height dimension of the fitting surface 31 can be 5 mm, 6 mm, 7 mm, 8 mm, 8.5 mm, or 10 mm, and the like. Thus, by setting the height dimension of the fitting surface 31 to be greater than 5 mm and less than 10 mm, the contact stability between the fitting surface 31 and the locking surface 121 is further improved, thereby enhancing the locking effect, mitigating the risk of the nut 30 rotating under the driving of the fixing member 20, while improving the assembly efficiency.

[0041] In some embodiments, the number of the fitting surfaces 31 is a plurality, and the plurality of fitting surfaces 31 are sequentially connected, and at least part of one of the plurality of fitting surfaces 31 abuts against the locking surface 121. For example, the number of the fitting surfaces 31 can be four, six, eight, and the like, but is not limited thereto. Specifically, the nut 30 can be a square nut 30, a hexagonal nut 30, an octagonal nut 30, and the like, but is not limited thereto. The fitting surface 31 can be the outer side surface corresponding to the straight side of the nut 30. For example, taking the hexagonal nut 30 as an example, the hexagonal nut 30 can have six fitting surfaces 31, and the six fitting surfaces 31 are sequentially connected in a head-to-tail manner in the circumferential direction of the mounting hole 113. Thus, by setting the number of the fitting surfaces 31 to be a plurality, the nut 30 can abut against the locking surface 121 through different fitting surfaces 31 in different assembly postures during assembly, so that the limiting effect can be achieved through different fitting surfaces 31, thereby improving the assembly efficiency. It should be noted that the at least partial abutment between the fitting surface 31 and the locking surface 121 means that the fitting surface 31 can partially abut against the locking surface 121, or completely abut against the locking surface 121. For example, the fitting surface 31 can be completely parallel to and in contact with the locking surface 121, so that the fitting surface 31 completely abuts against the locking surface 121. Alternatively, the fitting surface 31 can form a certain angle with the locking surface 121, so that part of the fitting surface 31 abuts against the locking surface 121.

[0042] In some embodiments, the number of the fitting faces 31 is four. Exemplarily, the nut 30 can be a square nut 30. It can be understood that, in the state of the same radial dimension, by setting the nut 30 as a square nut 30, the length dimension of the fitting face 31 can be improved, thereby improving the contact stability of the fitting face 31 and the locking face 121, further relieving the risk of rotation of the nut 30 under the driving of the fixing member 20, and meanwhile improving the assembly efficiency.

[0043] In some embodiments, the mounting portion 11 comprises a first portion 111 and a second portion 112 which are arranged at intervals in the opening direction x2 of the mounting hole 113, the first portion 111 forms a first hole section 1131 of the mounting hole 113, the second portion 112 forms a second hole section 1132 of the mounting hole 113, the extension portion 22 is interposed between the first hole section 1131 and the second hole section 1132, and part of the extension portion 22 is exposed between the first portion 111 and the second portion 112, and the steering knuckle 200 is connected with the part of the extension portion 22 exposed between the first portion 111 and the second portion 112. Exemplarily, taking the fixing member 20 as a bolt for example, the fixing member 20 can be interposed between the first hole section 1131 and the second hole section 1132 along the direction from the first portion 111 to the second portion 112, the flange portion 21 is in contact with the side of the first portion 111 away from the second portion 112, the nut 30 is sleeved on the end of the extension portion 22 away from the flange portion 21, and the steering knuckle 200 is connected with the part of the extension portion 22 exposed between the first portion 111 and the second portion 112. Specifically, the steering knuckle 200 can comprise a connecting portion having a connecting hole, the connecting hole is sleeved on the extension portion 22 and located between the first portion 111 and the second portion 112, so that the steering knuckle 200 is connected with the swing arm assembly 100 through the fixing member 20. Thus, the assembly difficulty of the steering knuckle 200 and the swing arm assembly 100 is reduced, the connection stability of the steering knuckle 200 and the swing arm assembly 100 is improved, and meanwhile the assembly efficiency is improved.

[0044] In some embodiments, the protruding portion 12 is located on one side of one of the first portion 111 and the second portion 112 away from the other. Exemplarily, the protruding portion 12 can be located on one side of the first portion 111 away from the second portion 112, or on one side of the second portion 112 away from the first portion 111. It can be understood that, taking the fixing member 20 as a bolt for example, when the protruding portion 12 is located on one side of the first portion 111 away from the second portion 112, the bolt can be inserted into the second hole segment 1132 and the first hole segment 1131 in a direction from the second portion 112 to the first portion 111, and the nut 30 is sleeved on the bolt and located on one side of the first portion 111 away from the second portion 112. When the protruding portion 12 is located on one side of the second portion 112 away from the first portion 111, the bolt can be inserted into the first hole segment 1131 and the second hole segment 1132 in a direction from the first portion 111 to the second portion 112, and the nut 30 is sleeved on the bolt and located on one side of the second portion 112 away from the first portion 111. In this way, the protruding portion 12 can better limit the nut 30, and the risk of the nut 30 rotating under the driving of the fixing member 20 can be alleviated.

[0045] In some embodiments, the protruding portion 12 is integrally formed with the mounting portion 11. In this way, by integrally forming the protruding portion 12 with the mounting portion 11, the integration of the protruding portion 12 and the mounting portion 11 can be further improved, the connection stability of the protruding portion 12 and the mounting portion 11 can be improved, the volume of the swing arm assembly 100 can be reduced, and the space can be saved without additionally arranging a separate limiting component to limit the nut 30, thereby improving the assembly efficiency.

[0046] In summary, the swing arm assembly 100 provided by the application is applied to the suspension system 2, the suspension system 2 comprises a knuckle 200, the swing arm assembly 100 comprises a swing arm body 10, a fixing piece 20 and a nut 30, the swing arm body 10 comprises a mounting portion 11 and a protruding portion 12, the mounting portion 11 is provided with a mounting hole 113 penetrating through the opposite surfaces of the mounting portion 11, the protruding portion 12 is protrudingly arranged on the mounting portion 11, and in the radial direction x1 of the mounting hole 113, the protruding portion 12 is arranged in a spaced manner with the mounting hole 113, and the protruding portion 12 has a clamping surface 121 facing the mounting hole 113; the fixing piece 20 is used for being connected with the knuckle 200, the fixing piece 20 comprises a flange portion 21 and an extension portion 22 connected with each other, the extension portion 22 is arranged through the mounting hole 113, and the flange portion 21 is in abutment with the side surface of the mounting portion 11 away from the protruding portion 12; the nut 30 is sleeved on the extension portion 22 and in contact with the side of the mounting portion 11 away from the flange portion 21, and the nut 30 has a matching surface 31, the matching surface 31 is at least partially in abutment with the clamping surface 121 to limit the nut 30 in the circumferential direction of the mounting hole 113. Through the above-mentioned embodiments, the clamping surface 121 of the protruding portion 12 can be in abutment with the matching surface 31 of the nut 30, so as to limit the nut 30 in the circumferential direction of the mounting hole 113, thereby relieving the risk that the nut 30 is rotated in the circumferential direction of the mounting hole 113 under the driving of the fixing piece 20, improving the assembly efficiency, and at the same time, the structure is simple and space-saving.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; 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, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A swing arm assembly, characterized by, The application is applied to a suspension system, the suspension system comprises a knuckle, and the swing arm assembly comprises: a swing arm body comprising a mounting portion and a protruding portion, the mounting portion is provided with a mounting hole penetrating through two opposite surfaces of the mounting portion, the protruding portion is protrudingly arranged on the mounting portion, and the protruding portion is arranged in a radial direction of the mounting hole, the protruding portion has a clamping surface facing the mounting hole; a fixing member for connecting with the knuckle, the fixing member comprises a flange portion and an extension portion connected with each other, the extension portion is arranged in the mounting hole, and the flange portion is in abutment with a side surface of the mounting portion away from the protruding portion; a nut is sleeved on the extension portion and in contact with a side of the mounting portion away from the flange portion, the nut has a matching surface, and the matching surface is at least partially in abutment with the clamping surface to limit the nut in a circumferential direction of the mounting hole.

2. The swing arm assembly of claim 1, wherein, In an opening direction of the mounting hole, a height dimension of the clamping surface is greater than a height dimension of the matching surface.

3. The swing arm assembly of claim 2, wherein, The height dimension of the matching surface is greater than or equal to 5 mm and less than or equal to 10 mm.

4. The swing arm assembly of claim 1, wherein, The number of the matching surfaces is multiple, and the multiple matching surfaces are sequentially connected, and at least part of one of the multiple matching surfaces is in abutment with the clamping surface.

5. The swing arm assembly of claim 4, wherein, The number of the matching surfaces is four.

6. The swing arm assembly of claim 1, wherein, The mounting portion comprises a first portion and a second portion arranged in a spaced manner in the opening direction of the mounting hole, the first portion forms a first hole segment of the mounting hole, the second portion forms a second hole segment of the mounting hole, the extension portion is interposed between the first hole segment and the second hole segment, and part of the extension portion is exposed between the first portion and the second portion, and the knuckle is connected with the part of the extension portion exposed between the first portion and the second portion.

7. The swing arm assembly of claim 6, wherein, The protruding portion is located on a side of one of the first portion and the second portion away from the other.

8. The swing arm assembly of claim 1, wherein, The protruding portion is integrally arranged with the mounting portion.

9. A suspension system characterized by, The suspension system comprises the knuckle and the swing arm assembly as claimed in any one of claims 1 to 8, and the swing arm assembly is connected with the knuckle.

10. A vehicle characterized by comprising: The vehicle comprises the suspension system as claimed in claim 9.

Images