Front suspension lower swing arm, front suspension lower swing arm assembly and automobile

Abstract

The utility model discloses a front suspension lower swing arm, a front suspension lower swing arm assembly and an automobile, which comprise a swing arm body, the swing arm body extends from a first end to a second end along the length direction, the first end forms a swing arm ball pin mounting part, the second end forms a bushing pin mounting part, and the swing arm body bends outwards between the first end and the second end and is provided with a sleeve mounting part. The swing arm body comprises a swing arm upper plate, a middle reinforcing plate and a swing arm lower plate, the middle reinforcing plate is arranged in an inner cavity between the swing arm upper plate and the swing arm lower plate, and the edge of the middle reinforcing plate is welded to the box-shaped structure; the bushing pin is connected to the bushing pin mounting part of the swing arm body; and the first sleeve is connected to the sleeve mounting part of the swing arm body, and the first sleeve and the lining pin are coaxially arranged. According to the utility model, miniaturization can be implemented, the strength is better, the performance is better, the strength, the rigidity and the buckling performance are improved to the greatest extent, the operation stability and the NVH performance are effectively solved, and meanwhile, the cost is optimal.

Description

Technical Field

[0001] This utility model is applicable to the automotive field, and in particular relates to a front suspension lower control arm, a front suspension lower control arm assembly, and an automobile. Background Technology

[0002] In recent years, with the widespread adoption of electric vehicles, consumers have increasingly higher demands for overall driving experience and NVH performance. The front suspension lower control arm, as a crucial chassis component, is connected to the steering knuckle and subframe via ball joints, rubber bushings, and other components. The front suspension lower control arm provides mounting support for various suspension components while transmitting vertical, longitudinal, and lateral forces from the road surface.

[0003] In existing technologies, single-layer or double-layer steel plate welding is typically used for small cars, but the strength, durability, and rigidity of the above structures cannot meet the requirements for large vehicles. To address these issues, cast aluminum structures are usually used to improve strength, durability, and rigidity, but this doubles the cost.

[0004] In addition, many existing lower control arms suffer from difficulties in maintenance and poor future expansion capabilities.

[0005] In summary, the problems existing in the relevant technologies urgently need to be solved. Utility Model Content

[0006] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a front suspension lower control arm, a front suspension lower control arm assembly, and an automobile.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] Firstly, a front suspension lower control arm includes:

[0009] A swing arm body extends from a first end to a second end along its length. The first end forms a swing arm ball pin mounting part, and the second end forms a bushing pin mounting part. The swing arm body bends outward between the first end and the second end and is provided with a sleeve mounting part. The swing arm body includes a swing arm upper plate, an intermediate reinforcing plate, and a swing arm lower plate. The swing arm upper plate and the swing arm lower plate extend along the length direction of the swing arm body. At least one of the edges of the swing arm upper plate and the swing arm lower plate is provided with a folded edge, which extends along the length direction of the swing arm body. The swing arm upper plate and the swing arm lower plate are welded together through the folded edge to form a box-shaped structure with an inner cavity. The intermediate reinforcing plate is disposed in the inner cavity between the swing arm upper plate and the swing arm lower plate, and the edge of the intermediate reinforcing plate is welded to the box-shaped structure.

[0010] Bushing pin, connected to the bushing pin mounting part of the swing arm body;

[0011] The first sleeve is connected to the sleeve mounting part of the swing arm body, and the first sleeve is coaxially arranged with the bushing pin.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the lower plate of the swing arm has a first folded edge on both sides, and a U-shaped cavity is formed by the first folded edge. The intermediate reinforcing plate is disposed in the U-shaped cavity, and the two sides of the intermediate reinforcing plate are welded to the inner wall of the first folded edge. The upper plate of the swing arm has a second folded edge on both sides, and the upper plate of the swing arm is fastened to the lower plate of the swing arm. The first folded edge and the second folded edge overlap and are welded.

[0013] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the lower plate of the swing arm is provided with a plurality of first positioning holes, and the intermediate reinforcing plate is provided with a plurality of second positioning holes corresponding to the first positioning holes.

[0014] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the end of the intermediate reinforcing plate is provided with a notch that extends inwards, avoiding the edge of the intermediate reinforcing plate.

[0015] In combination with the first aspect and the above-described implementations, some implementations of the first aspect further include a swing arm ball pin, wherein the upper swing arm plate and the lower swing arm plate are pressed together at the first end of the swing arm body to form a swing arm ball pin mounting part, and the swing arm ball pin is connected to the swing arm ball pin mounting part by fasteners.

[0016] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the bushing pin mounting portion includes a socket defined by the upper swing arm plate and the lower swing arm plate at the second end of the swing arm body, the upper swing arm plate and the lower swing arm plate are provided with welding grooves on the outer wall surface of the socket, the bushing pin is inserted into the socket and welded to the upper swing arm plate and the lower swing arm plate.

[0017] In combination with the first aspect and the above-described implementation methods, in some implementation methods of the first aspect, the first sleeve is provided with a first bushing.

[0018] In conjunction with the first aspect and the above-described implementations, some implementations of the first aspect further include a second sleeve and a second bushing disposed in the second sleeve. The second bushing is installed on the bushing pin. The second sleeve is provided with a subframe bracket and a body bracket. The subframe bracket includes an upper overlapping plate, a lower overlapping plate, and a reinforcing plate connected between the upper overlapping plate and the lower overlapping plate. The upper overlapping plate is provided with a nut, and the lower overlapping plate is provided with a bolt hole corresponding to the nut. The body bracket is provided with a mounting hole, and the mounting hole is provided with an opening extending to the edge of the body bracket.

[0019] In a second aspect, a front suspension lower control arm assembly includes a front subframe and a front suspension lower control arm as described in any implementation of the first aspect, wherein the control arm body is connected to the front subframe via the bushing pin and the first sleeve.

[0020] Thirdly, an automobile includes a front suspension lower control arm assembly as described in any implementation of the second aspect.

[0021] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of this utility model, the swing arm body is formed by welding a low-cost plate structure. The upper and lower swing arm plates are welded together to form a box-shaped structure with an inner cavity. In the core stress area, an intermediate reinforcing plate is further provided to enhance the strength of the core stress area, ultimately forming a three-layer plate structure. Compared with the prior art, this utility model can achieve miniaturization, better strength, and superior performance, maximizing strength, rigidity, and buckling performance. It not only effectively solves the problems of handling stability and NVH performance but also achieves optimal cost.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an isometric view of an embodiment of the front suspension lower control arm of this utility model;

[0025] Figure 2 This is a bottom view of an embodiment of the front suspension lower control arm of this utility model;

[0026] Figure 3 This is a side view of a structural embodiment of the front suspension lower control arm of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of an embodiment of the front suspension lower control arm of this utility model when the control arm ball pin is not installed;

[0028] Figure 5 This is a schematic diagram of the structure of an embodiment of the front suspension lower control arm of this utility model, in which the intermediate reinforcing plate is installed in the lower plate of the control arm;

[0029] Figure 6 This is a schematic diagram of the intermediate reinforcing plate structure in one embodiment of the front suspension lower control arm of this utility model;

[0030] Figure 7 yes Figure 4 Cross-sectional view at point AA;

[0031] Figure 8 This is a schematic diagram of the structure of the intermediate reinforcing plate welded to the inner wall of the first folded edge in one embodiment of the front suspension lower control arm of this utility model;

[0032] Figure 9 This is a schematic diagram of an embodiment of the second sleeve of this utility model;

[0033] Figure 10 This is a schematic diagram of an embodiment of the front suspension lower control arm assembly of this utility model. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0036] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0037] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0038] See Figures 1-4This utility model provides a front suspension lower control arm, including a control arm body 100, a bushing pin 200, and a first sleeve 300. The control arm body 100 extends along its length from a first end 101 to a second end 102. The first end 101 forms a control arm ball pin mounting portion 103, and the second end 102 forms a bushing pin mounting portion 104. The control arm body 100 bends outward between the first end 101 and the second end 102 and is provided with a sleeve mounting portion 105. The control arm body 100 forms a core stress area between the control arm ball pin mounting portion 103, the bushing pin mounting portion 104, and the sleeve mounting portion 105. The bushing pin 200 is connected to the bushing pin mounting portion 104 of the control arm body 100. The first sleeve 300 is connected to the sleeve mounting portion 105 of the control arm body 100, and the first sleeve 300 is coaxially arranged with the bushing pin 200. The control arm body 100 adopts a space-minimizing design, employing a thin strip design strategy in its specifications to reduce horizontal and longitudinal space and increase design margins for surrounding suspension components. Horizontally, the control arm body 100 features a curved design to avoid the stabilizer bar, further enhancing design margins.

[0039] See Figures 1-7 The swing arm body 100 includes an upper swing arm plate 106, an intermediate reinforcing plate 107, and a lower swing arm plate 108. The upper swing arm plate 106 and the lower swing arm plate 108 extend along the length direction of the swing arm body 100. At least one of the edges of the upper swing arm plate 106 and the lower swing arm plate 108 is provided with a folded edge, which extends along the length direction of the swing arm body 100. The upper swing arm plate 106 and the lower swing arm plate 108 are welded together to form a box-shaped structure with an inner cavity. The intermediate reinforcing plate 107 is disposed in the inner cavity between the upper swing arm plate 106 and the lower swing arm plate 108. The edge of the intermediate reinforcing plate 107 is welded to the box-shaped structure. In other words, the edge of the intermediate reinforcing plate 107 can be welded to the upper swing arm plate 106 and / or the lower swing arm plate 108.

[0040] In this invention, the swing arm body 100 is formed by welding low-cost plate structures. The upper swing arm plate 106 and the lower swing arm plate 108 are welded together to form a box-shaped structure with an internal cavity. In the core stress area, an intermediate reinforcing plate 107 is further provided to enhance the strength of the core stress area, ultimately forming a three-layer plate structure. In use, the swing arm body 100 is connected to the front subframe 600 via bushing pins 200 and a first sleeve 300. Compared to existing technologies, this invention enables miniaturization, offers better strength and performance, and maximizes strength, rigidity, and buckling performance. It effectively addresses handling stability and NVH performance while achieving optimal cost.

[0041] In some embodiments, see Figures 4-7The lower edge of the swing arm plate 108 has first folded edges 109 formed on both sides by stamping or other means, and a U-shaped cavity is formed by the first folded edges 109. The middle reinforcing plate 107 is smaller than the width of the lower edge of the swing arm plate 108 and the lower edge of the swing arm plate 108. The middle reinforcing plate 107 is set in the U-shaped cavity and located in the core stress area of ​​the swing arm body 100. The two sides of the middle reinforcing plate 107 are welded to the inner wall of the first folded edge 109. The two sides of the upper edge of the swing arm plate 106 are provided with second folded edges 110. The upper edge of the swing arm plate 106 is fastened to the lower edge of the swing arm plate 108. The first folded edge 109 and the second folded edge 110 overlap and are welded. The lower control arm plate 108 and the lower control arm plate 108 are welded together to form a hollow structure, which significantly improves the strength and rigidity of the control arm body 100. Simultaneously, the intermediate reinforcing plate 107 forms a reinforcing rib between the lower control arm plate 108 and the lower control arm plate 108. The lower control arm plate 108, the intermediate reinforcing plate 107, and the lower control arm plate 108 form a three-layer plate structure, further enhancing the strength and rigidity of the control arm body 100. In this embodiment, the first folded edge 109 of the lower control arm plate 108 provides a welding position for the intermediate reinforcing plate 107, facilitating the fabrication of the entire control arm body 100.

[0042] Further, see Figures 1-7 The lower plate 108 of the swing arm is provided with a plurality of first positioning holes 111, and the intermediate reinforcing plate 107 is provided with a plurality of second positioning holes 112 corresponding to the first positioning holes 111. During the processing of the swing arm body 100, the lower plate 108 of the swing arm is positioned and supported by positioning elements that cooperate with the first positioning holes 111, while the intermediate reinforcing plate 107 placed in the lower plate 108 is further positioned and supported by positioning elements that pass through the first positioning holes 111 and cooperate with the second positioning holes 112, so as to achieve precise positioning before welding and improve processing efficiency.

[0043] In some embodiments, see Figure 5 , Figure 6 The end of the intermediate reinforcing plate 107 is provided with a notch 113 that extends inward, avoiding the edge of the intermediate reinforcing plate 107. The intermediate reinforcing plate 107 adopts a Y-shaped hollow structure, which reduces weight on the one hand, and ensures the weld length between the intermediate reinforcing plate 107 and the lower plate 108 of the swing arm on the other hand, so as to achieve a balance between weight and strength rigidity performance.

[0044] In some embodiments, the front suspension lower control arm further includes a control arm ball joint 400. The upper control arm plate 106 and the lower control arm plate 108 are pressed together at the first end 101 of the control arm body 100 to form a control arm ball joint mounting portion 103. The front suspension lower control arm forms a double-layered structure at the control arm ball joint mounting portion 103, enhancing the strength of the control arm ball joint mounting portion 103. The control arm ball joint 400 is connected to the control arm ball joint mounting portion 103 by fasteners such as screws. The control arm ball joint 400 is designed to connect to the control arm body 100 using simple fasteners, allowing for easy replacement and repair after maintenance, improving convenience and reducing operating costs.

[0045] In some embodiments, see Figure 5 The upper control arm plate 106 and the lower control arm plate 108 form symmetrical arc-shaped notches at their second ends 102 through stamping or other methods. The bushing pin mounting part 104 includes an insertion port defined by the upper control arm plate 106 and the lower control arm plate 108 at the second end 102 of the control arm body 100. The bushing pin 200 is inserted into the insertion port and welded to the upper control arm plate 106 and the lower control arm plate 108. By adjusting the welding position of the bushing pin 200, axial translation can be performed, thereby adjusting the mounting hard points of the suspension, improving the scalability of design and development, and simplifying subsequent development.

[0046] The upper swing arm plate 106 and the lower swing arm plate 108 are provided with welding grooves 113 on the outer wall surface of the socket to facilitate welding and ensure welding strength.

[0047] In some embodiments, see Figure 1 The first sleeve 300 is provided with a first bushing 301, which can be further connected to the bolts of the front subframe through the first bushing 301.

[0048] In some embodiments, see Figure 1 , Figure 2 , Figure 3 and Figure 9 The front suspension lower control arm also includes a second sleeve 501 and a second bushing 502 disposed in the second sleeve 501. The second bushing 502 is mounted on a bushing pin 200. The second sleeve 501 is provided with a subframe bracket and a body bracket. The subframe bracket includes an upper overlapping plate 503, a lower overlapping plate 504, and a reinforcing plate 505 connecting the upper overlapping plate 503 and the lower overlapping plate 504. The upper overlapping plate 503 is provided with a nut 506, and the lower overlapping plate 504 is provided with bolt holes 507 corresponding to the nut 506. During production and assembly, bolts are tightened from the bottom to secure the second sleeve 501 to the front subframe 600, improving production efficiency and after-sales maintenance performance. The body bracket is used to connect to the body. The body bracket is provided with mounting holes, which have openings extending to the edge of the body bracket. The mounting holes adopt an open design, which facilitates assembly and improves production efficiency.

[0049] An embodiment of this utility model also provides a front suspension lower control arm assembly, see [link to relevant documentation]. Figure 10 The system includes a front subframe 600 and a front suspension lower control arm in any of the above embodiments. The control arm body 100 is connected to the front subframe via a bushing pin 200 and a first sleeve 300. The control arm body 100 is capable of swinging about the axis of the bushing pin 200 and the first sleeve 300.

[0050] An embodiment of this utility model also provides an automobile, including the front suspension lower control arm assembly of any of the above embodiments.

[0051] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A front suspension swing arm, characterized by, include: A swing arm body extends from a first end to a second end along its length. The first end forms a swing arm ball pin mounting part, and the second end forms a bushing pin mounting part. The swing arm body bends outward between the first end and the second end and is provided with a sleeve mounting part. The swing arm body includes a swing arm upper plate, an intermediate reinforcing plate, and a swing arm lower plate. The swing arm upper plate and the swing arm lower plate extend along the length direction of the swing arm body. At least one of the edges of the swing arm upper plate and the swing arm lower plate is provided with a folded edge, which extends along the length direction of the swing arm body. The swing arm upper plate and the swing arm lower plate are welded together through the folded edge to form a box-shaped structure with an inner cavity. The intermediate reinforcing plate is disposed in the inner cavity between the swing arm upper plate and the swing arm lower plate, and the edge of the intermediate reinforcing plate is welded to the box-shaped structure. Bushing pin, connected to the bushing pin mounting part of the swing arm body; The first sleeve is connected to the sleeve mounting part of the swing arm body, and the first sleeve is coaxially arranged with the bushing pin.

2. The front suspension swing arm of claim 1 wherein, The lower plate of the swing arm has a first folded edge on both sides, and a U-shaped cavity is formed by the first folded edge. The middle reinforcing plate is disposed in the U-shaped cavity. The two sides of the middle reinforcing plate are welded to the inner wall of the first folded edge. The upper plate of the swing arm has a second folded edge on both sides. The upper plate of the swing arm is fastened to the lower plate of the swing arm. The first folded edge and the second folded edge overlap and are welded.

3. The front suspension swing arm of claim 2 wherein, The lower plate of the swing arm is provided with a plurality of first positioning holes, and the intermediate reinforcing plate is provided with a plurality of second positioning holes corresponding to the first positioning holes.

4. The front suspension swing arm of claim 2 wherein, The end of the intermediate reinforcing plate has a notch that extends inward, avoiding the edge of the intermediate reinforcing plate.

5. The front suspension swing arm of claim 1 wherein, It also includes a swing arm ball pin, wherein the upper swing arm plate and the lower swing arm plate are pressed together at the first end of the swing arm body to form a swing arm ball pin mounting part, and the swing arm ball pin is connected to the swing arm ball pin mounting part by fasteners.

6. The front suspension swing arm of claim 1 wherein, The bushing pin mounting part includes a socket defined by the upper swing arm plate and the lower swing arm plate at the second end of the swing arm body. The upper swing arm plate and the lower swing arm plate are provided with welding grooves on the outer wall surface of the socket. The bushing pin is inserted into the socket and welded to the upper swing arm plate and the lower swing arm plate.

7. The front suspension swing arm of claim 1 wherein, The first sleeve is provided with a first bushing.

8. The front suspension swing arm of claim 1 wherein, It also includes a second sleeve and a second bushing disposed in the second sleeve. The second bushing is installed on the bushing pin. The second sleeve is provided with a subframe bracket and a body bracket. The subframe bracket includes an upper overlapping plate, a lower overlapping plate and a reinforcing plate connected between the upper overlapping plate and the lower overlapping plate. The upper overlapping plate is provided with a nut. The lower overlapping plate is provided with a bolt hole corresponding to the nut. The body bracket is provided with a mounting hole. The mounting hole is provided with an opening extending to the edge of the body bracket.

9. A front suspension swing arm assembly, characterized by, It includes a front subframe and a front suspension lower control arm as described in any one of claims 1 to 8, wherein the control arm body is connected to the front subframe via the bushing pin and the first sleeve.

10. An automobile characterized by comprising: Includes the front suspension lower control arm assembly as described in claim 9.

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