Sheet metal stamping control arm
Patent Information
- Application Number
- CN202522609806.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-12-09
AI Technical Summary
[0003]本实用新型提供了一种钣金冲压控制臂，可以解决现有锻铝控制臂成本高、加工繁琐，以及钣金焊接控制臂簧下重量大、强度不足、焊接变形导致孔位偏差的问题
控制臂本体通过钣金冲压一体成型，实现了轻量化，无需焊接，彻底解决焊接变形导致的孔位偏差问题，提升悬架定位精度；U形截面结构、加强筋的设计，保证了足够的承载强度和刚度；第一过渡圆角和第二过渡圆角及凹槽效分散应力集中。可以解决现有锻铝控制臂成本高、加工繁琐，以及钣金焊接控制臂簧下重量大、强度不足、焊接变形导致孔位偏差的问题。
Smart Images
Figure CN224868161U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of control arm technology, specifically a sheet metal stamping control arm. Background Technology
[0002] The control arm is a core force-transmitting component of the automotive rear suspension system. Its core function is to connect the subframe and the steering knuckle, bearing and transmitting longitudinal traction, lateral forces, and vertical impact loads during vehicle operation, directly affecting the vehicle's handling stability, ride comfort, and braking safety. With the automotive industry's increasingly stringent demands for lightweight and energy-saving designs, existing control arms are mostly made of forged aluminum or sheet metal stamping and welding. Forged aluminum control arms involve complex manufacturing processes, requiring multiple steps such as forging and machining, making it difficult to meet the cost control requirements of mass production. Sheet metal welding control arms can significantly reduce costs, but they increase the unsprung weight of the entire vehicle and reduce the overall strength of the control arm. The welding process is also prone to deformation, leading to deviations in mounting hole positions and affecting suspension positioning accuracy. Therefore, a one-piece, structurally optimized sheet metal stamping control arm that balances strength and lightweight design is needed to meet current practical requirements. Utility Model Content
[0003] This utility model provides a sheet metal stamping control arm, which can solve the problems of high cost and complicated processing of existing forged aluminum control arms, as well as the problems of large unsprung weight, insufficient strength, and hole position deviation caused by welding deformation in sheet metal welded control arms.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a sheet metal stamped control arm, comprising a control arm body with a U-shaped cross-section and an opening facing downwards. The control arm body includes an integrally formed first connecting plate, a second connecting plate, and a third connecting plate, the second and third connecting plates being arranged opposite to each other. One end of the second and third connecting plates is a steering knuckle mounting portion connected to a steering knuckle, and the other end is a subframe mounting portion connected to a subframe. The steering knuckle mounting portion is provided with mounting holes. An inwardly extending sleeve is fixedly provided on the relatively inner side of the subframe mounting portion. The middle of the second and third connecting plates is provided with outwardly protruding reinforcing ribs along the length direction. The control arm body is integrally formed by sheet metal stamping, achieving lightweight design. The U-shaped cross-section structure and the reinforcing rib design ensure sufficient load-bearing strength and rigidity.
[0005] As a supplement to the technical solution described in this utility model, a first transition fillet is provided at the connection between the first connecting plate, the second connecting plate, and the third connecting plate. The first transition fillet is used to disperse stress concentration at the connection and avoid fatigue cracks at the connection.
[0006] As a supplement to the technical solution described in this utility model, a second transition fillet is provided at the connection between the sleeve and the second connecting plate and the third connecting plate to further optimize the stress distribution and avoid local breakage under load.
[0007] As a supplement to the technical solution described in this utility model, the first connecting plate has an arc-shaped structure with high ends and low middle. The cross-sectional area of the first connecting plate gradually decreases from the steering knuckle mounting part to the subframe mounting part. Under the premise of meeting the assembly requirements with the steering knuckle mounting part and the subframe mounting part, the cross-sectional size of the first connecting plate can be appropriately reduced, so as to achieve lightweighting while ensuring the basic requirements of strength performance.
[0008] As a supplement to the technical solution described in this utility model, a groove is provided at one end of the first connecting plate near the subframe mounting part to avoid stress concentration, and a U-shaped clearance notch is provided at one end of the first connecting plate near the steering knuckle mounting part to avoid interference between the control arm and the surrounding components of the suspension.
[0009] Compared with the prior art, the beneficial effects of this utility model are: The control arm body is integrally formed by sheet metal stamping, achieving lightweight design and eliminating the need for welding. This completely solves the problem of hole position deviation caused by welding deformation, improving suspension positioning accuracy. The U-shaped cross-section structure and reinforcing rib design ensure sufficient load-bearing strength and rigidity. The first and second transition fillets and grooves effectively disperse stress concentration. This solves the problems of high cost and cumbersome processing of existing forged aluminum control arms, as well as the problems of large unsprung weight, insufficient strength, and hole position deviation caused by welding deformation in sheet metal welded control arms. Attached Figure Description
[0010] Figure 1 The three-dimensional structure of this utility model Figure 1 ; Figure 2 The three-dimensional structure of this utility model Figure 2 ; Figure 3 The three-dimensional structure of this utility model Figure 3 ; Figure 4 The three-dimensional structure of this utility model Figure 4 .
[0011] Figure label: 1. Control arm body; 2. First connecting plate; 3. Second connecting plate; 4. Third connecting plate; 5. Steering knuckle mounting part; 6. Subframe mounting part; 7. Mounting hole; 8. Sleeve; 9. Reinforcing rib; 10. First transition fillet; 11. Second transition fillet; 12. Groove; 13. U-shaped clearance notch. Detailed Implementation
[0012] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0013] The embodiments of this utility model relate to a sheet metal stamping control arm, such as... Figure 1-4 As shown, the control arm body 1 has a U-shaped cross-section with the opening facing downwards. The control arm body 1 includes an integrally formed first connecting plate 2, a second connecting plate 3, and a third connecting plate 4. The second connecting plate 3 and the third connecting plate 4 are arranged opposite each other, forming the two side walls of the U-shaped structure. The first connecting plate 2 serves as the bottom wall of the U-shaped structure, providing connection and load-bearing functions. One end of the second connecting plate 3 and the third connecting plate 4 is a steering knuckle mounting part 5 connected to the steering knuckle, and the other end is a subframe mounting part 6 connected to the subframe. The steering knuckle mounting part 5 is provided with mounting holes 7. The subframe mounting section 6 has a through hole; an inwardly extending sleeve 8 is fixedly installed on the inner side of the subframe mounting section 6, and the sleeve 8 is perpendicular to the second connecting plate 3 and the third connecting plate 4; the second connecting plate 3 and the third connecting plate 4 are both provided with outwardly protruding reinforcing ribs 9 along the length direction in the middle of the section. The reinforcing ribs 9 are integrally formed by stamping process. The reinforcing ribs 9 improve the structural strength of the control arm body 1, effectively disperse the stress concentration during load bearing, and avoid fatigue cracks at the connection. The control arm body is integrally formed by sheet metal stamping, which realizes lightweighting. The U-shaped cross-section structure and the design of the reinforcing ribs ensure sufficient load bearing strength and rigidity.
[0014] In this embodiment, as Figure 1 As shown, the preferred shape of the reinforcing rib 9 is a long strip with pointed ends. The cross-section of the reinforcing rib 9 is arc-shaped and is integrally formed by stamping. The reinforcing rib has a height of 4mm, a width of 16mm, and a length of 320mm.
[0015] In this embodiment, as Figure 2 As shown, a first transition fillet 10 is provided at the connection between the first connecting plate 2, the second connecting plate 3, and the third connecting plate 4. The first transition fillet 10 is used to disperse stress concentration at the connection and avoid fatigue cracks at the connection.
[0016] In this embodiment, as Figure 2 As shown, a second transition fillet 11 is provided at the connection between the sleeve 8 and the second connecting plate and the third connecting plate 4 to further optimize the stress distribution and avoid local fractures under load.
[0017] In this embodiment, as Figure 1As shown, the first connecting plate 2 has an arc-shaped structure that is high at both ends and low in the middle. The cross-sectional area of the first connecting plate 2 gradually decreases from the steering knuckle mounting part 5 to the subframe mounting part 6. Under the premise of meeting the assembly requirements with the steering knuckle mounting part 5 and the subframe mounting part 6, the cross-sectional size of the first connecting plate 2 can be appropriately reduced, so as to achieve lightweighting while ensuring the basic requirements of strength performance.
[0018] In this embodiment, as Figure 1 As shown, a groove 12 is provided at one end of the first connecting plate 2 near the subframe mounting part 6 to avoid stress concentration. A U-shaped clearance notch 13 is provided at one end of the first connecting plate 2 near the steering knuckle mounting part 5 to prevent the control arm from interfering with the surrounding components of the suspension.
[0019] In this embodiment, as Figure 1 As shown, the control arm body 1 is made of high-strength cold-rolled steel plate with a thickness of 2mm. The steel plate is cut into a preset shape by laser cutting. Reinforcing ribs 9 are formed in the middle of the second connecting plate 3 and the third connecting plate 4 by stamping. A forming groove 12 is set at one end of the first connecting plate 2. A U-shaped cross-section structure is stamped out by a special stamping die. Two coaxial through mounting holes 7 with a diameter of 12.3mm are formed at one end of the second connecting plate 3 and the third connecting plate 4 by stamping. A sleeve 8 is formed at the other end of the second connecting plate 3 and the third connecting plate 4. The sleeve 8 has a 90° flip-hole design with a diameter of 34.85mm, thus completing the processing of the control arm.
[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0021] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.
[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0023] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.
Claims
1. A sheet metal stamping control arm, characterized in that, include: The control arm body (1) has a U-shaped cross-section with the opening facing downwards. The control arm body (1) includes an integrally formed first connecting plate (2), second connecting plate (3) and third connecting plate (4). The second connecting plate (3) and third connecting plate (4) are arranged opposite to each other. One end of the second connecting plate (3) and the third connecting plate (4) is a steering knuckle mounting part (5) connected to the steering knuckle, and the other end is a subframe mounting part (6) connected to the subframe. The steering knuckle mounting part (5) is provided with mounting holes (7); An inwardly extending sleeve (8) is fixedly provided on the inner side of the subframe mounting part (6). The second connecting plate (3) and the third connecting plate (4) are provided with outwardly protruding reinforcing ribs (9) along the length direction in the middle part.
2. The sheet metal stamping control arm according to claim 1, characterized in that: The first connecting plate (2) is provided with a first transition fillet (10) at the connection between the second connecting plate (3) and the third connecting plate (4).
3. The sheet metal stamping control arm according to claim 1, characterized in that: The connection between the sleeve (8) and the second connecting plate and the third connecting plate (4) is provided with a second transition fillet (11).
4. The sheet metal stamping control arm according to claim 1, characterized in that: The first connecting plate (2) has an arc-shaped structure with high ends and low middle. The cross-sectional area of the first connecting plate (2) gradually decreases from the steering knuckle mounting part (5) to the subframe mounting part (6).
5. The sheet metal stamping control arm according to claim 1, characterized in that: The first connecting plate (2) has a groove (12) at one end near the subframe mounting part (6) and a U-shaped clearance notch (13) at one end near the steering knuckle mounting part (5).