Automobile chassis suspension system control arm
By setting a recess structure and threaded nut design at the connection hole of the car control arm, the problem of easy deformation and inconvenient assembly of the connection hole position is solved, and a more stable and convenient connection is achieved.
Patent Information
- Application Number
- CN202422323351.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The connecting holes of the existing automobile control arms are easily deformed after stamping and forming, and the rotating nut and bolt need to be synchronized when assembling, resulting in inconvenient connection.
The deformation resistance is increased by stamping the recess at the connecting hole, and a thread and a nut structure for positioning the connection are provided in the hole. When assembling, the fixing is achieved by simply rotating the bolts.
It improves the deformation resistance of the connecting holes, simplifies the assembly process of the control arm, and enhances the convenience and stability of the connection.
Smart Images
Figure CN223058719U_ABST
Abstract
Description
Technical Field:
[0001] The utility model relates to the technical field of automotive control arms, and more specifically to a control arm for an automotive chassis suspension system. Background Art:
[0002] At present, the control arm of an automobile is an important part of the automotive chassis suspension system, and its installation position and function have important impacts on the performance and stability of the vehicle. The existing control arms generally have two types. One is an integral type, and generally the main body of the control arm is obtained by casting, and then machined into shape. The other is a split type, which is formed by splicing and combining the upper and lower parts. The upper and lower parts are generally formed by stamping sheet metal, and then assembled into shape. Multiple connection holes are provided on the sheet metal stamping parts, and the connection holes directly realize the fixed connection of the upper and lower parts of the control arm through the installation stud assembly. At present, the connection holes are directly formed on the sheet metal by punching. When using the stud assembly for connection, the connection hole part is prone to extrusion deformation, so the strength at the connection hole position needs to be enhanced. At the same time, when connecting, it is necessary to ensure that the nut does not move while rotating the bolt, and the connection is not very convenient. Is there a convenient connection structure? Summary of the Utility Model:
[0003] The purpose of the utility model is to provide a control arm for an automotive chassis suspension system aiming at the deficiencies of the existing technology. The anti-deformation strength at the connection hole of the control arm plate is increased by stamping a concave platform at the connection hole. At the same time, a threaded and nut structure for positioning connection is formed at the connection hole, and during assembly, only the bolt needs to be rotated, which is convenient for realizing the assembly of the control arm.
[0004] A control arm for an automotive chassis suspension system includes an arc-shaped arm body formed by stamping a plate. A circular bushing connection hole is formed at the rear end of the arc-shaped arm body, and a semi-circular opening is formed at the front end. A downwardly concave and circular front concave platform is formed on the arc-shaped arm body near the opening. A front mounting hole is formed in the middle of the front concave platform. A conical convex ring is upset and formed on the upper side of the front mounting hole, and internal threads are formed on the inside of the convex ring and the front mounting hole.
[0005] A downwardly concave and circular middle concave platform is formed in the middle of the arc-shaped arm body, and a middle mounting hole is formed in the middle of the middle concave platform. A side concave platform communicating with the middle concave platform is formed on the arc-shaped arm body on one side of the middle concave platform. A positioning support plate is inserted into the side concave platform, and the positioning support plate is fixed to the bottom surface of the side concave platform by spot welding. One end of the positioning support plate extends out of the side concave platform and is located directly above the middle mounting hole and forms an upwardly concave positioning groove. A nut facing the middle mounting hole is inserted into the positioning groove, and the lower end surface of the nut abuts against the bottom surface of the middle concave platform.
[0006] Preferably, an avoidance through-hole opposite to the middle mounting hole is formed in the middle of the positioning groove on the positioning support plate.
[0007] Preferably, the inner walls of the front mounting hole and the convex ring on the arc-shaped arm body are in the same cylindrical surface.
[0008] Preferably, an arc-shaped rib groove sunken downward is formed on the arc-shaped arm body between the front concave platform and the inner side edge of the arc-shaped arm body.
[0009] Preferably, the depth of the upper concave platform on the arc-shaped arm body is less than the depth of the middle concave platform.
[0010] Preferably, the thickness of the positioning support plate is not greater than the depth of the side concave platform, and the aperture of the middle mounting hole on the middle concave platform is smaller than the aperture of the front mounting hole.
[0011] The beneficial effects of the present utility model are as follows:
[0012] At the connection hole of the control arm plate member, the anti-deformation strength at the connection hole is increased by stamping a concave platform; meanwhile, a threaded and positioning connection nut structure is formed at the connection hole, and during assembly, only the bolt needs to be rotated, which is convenient for realizing the assembly of the control arm. Description of the drawings:
[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0014] Figure 2 is a top-view structural schematic diagram of the present utility model;
[0015] Figure 3 is a bottom-view structural schematic diagram of the present utility model.
[0016] In the figure: 1. Arc-shaped arm body; 11. Bushing connection hole; 12. Opening; 13. Front concave platform; 14. Front mounting hole; 15. Convex ring; 16. Middle concave platform; 17. Middle mounting hole; 18. Middle mounting hole; 19. Flange; 110. Arc-shaped rib groove; 2. Arc-shaped rib groove; 21. Positioning groove; 22. Avoidance through-hole; 3. Nut. Specific implementation manners:
[0017] Example: As shown in Figures 1 to 3 , a control arm of an automobile chassis suspension system, the control arm is composed of upper and lower groups of cooperating arm frames, wherein the upper arm frame includes an arc-shaped arm body 1 formed by stamping a plate member. A circular bushing connection hole 11 is formed at the rear end of the arc-shaped arm body 1, and a semi-circular opening 12 is formed at the front end. An arc-shaped front concave platform 13 that is sunken downward and circular is formed on the arc-shaped arm body 1 near the opening 12. A front mounting hole 14 is formed in the middle of the front concave platform 13. A conical convex ring 15 is upset and formed on the upper side edge of the front mounting hole 14, and internal threads are formed inside the convex ring 15 and the front mounting hole 14;
[0018] A middle concave platform 16 that is downwardly recessed and circular is formed in the middle of the arc-shaped arm body 1. A middle mounting hole 17 is formed in the middle of the middle concave platform 16; a side concave platform 18 communicating with the middle concave platform 16 is formed on the arc-shaped arm body 1 on one side of the middle concave platform 16. A positioning support plate 2 is inserted into the side concave platform 18, and the positioning support plate 2 is fixedly welded to the bottom surface of the side concave platform 18 by spot welding; one end of the positioning support plate 2 extends out of the side concave platform 18 and is located directly above the middle mounting hole 17 and is formed with an upwardly recessed positioning groove 21. A nut 3 facing the middle mounting hole 17 is inserted into the positioning groove 21, and the lower end surface of the nut 3 abuts against the bottom surface of the middle concave platform 16.
[0019] An avoidance through hole 22 facing the middle mounting hole 17 is formed in the middle of the positioning groove 21 on the positioning support plate 2, and the bolt used for its connection can pass through the avoidance through hole 22.
[0020] The inner walls of the front mounting holes 14 and the inner wall of the convex ring 15 on the arc-shaped arm body 1 are in the same cylindrical surface, so that the internal thread of the hole diameter has a suitable length to ensure the connection strength.
[0021] An arc-shaped rib groove 110 that is downwardly recessed is formed on the arc-shaped arm body 1 between the front concave platform 13 and the inner side edge of the arc-shaped arm body 1. Arc-shaped retaining edges 19 are respectively bent and formed on the inner and outer side edges of the arc-shaped arm body 1. Both the retaining edge 19 and the arc-shaped rib groove 110 can enhance the strength of the arc-shaped arm body 1. Among them, the arc-shaped rib groove 110 is close to the inner side edge of the arc-shaped arm body 1 and is at the position where the bending angle of the arc-shaped arm body 1 is the largest.
[0022] The depth of the side concave platform 18 on the arc-shaped arm body 1 is less than the depth of the middle concave platform 16, that is, the bottom surface of the side concave platform 18 is higher than the bottom surface of the middle concave platform 16.
[0023] The thickness of the positioning support plate 2 is not greater than the depth of the side concave platform 18, and the aperture of the middle mounting hole 17 on the middle concave platform 16 is smaller than the aperture of the front mounting hole 14. Because the aperture of the middle mounting hole 17 is small, it is impossible to use the material in the hole for upsetting and forming a convex ring structure, so the connection structure of the nut 3 is set.
[0024] Working principle: This structure is a control arm of an automotive chassis suspension system. A bushing connection hole 11 is provided at the rear end of its arc-shaped arm body 1. Through the rear bushing assembly, the rear ends of the upper and lower sets of arm frames can be fixedly connected together. And its front end is an opening 12. Therefore, front mounting holes 14 and middle mounting holes 17 are respectively provided at the front and middle parts of the arc-shaped arm body 1. Among them, before stamping and cutting the front mounting holes 14 and the middle mounting holes 17, a concave platform structure is first formed by stamping to increase the anti-deformation strength of the front mounting holes 14 and the middle mounting holes 17;
[0025] Among them, the aperture of the front mounting hole 14 is slightly larger, so instead of directly punching a hole, the material inside the hole is used to form a convex ring 15 by upsetting, and internal threads are formed in the convex ring 15 and the front mounting hole 14, which is the existing manufacturing method of the nut plate; while the aperture of the middle mounting hole 17 cannot form a threaded structure by upsetting, so a side concave platform 18 is punched and formed on one side of the middle mounting hole 17, and the side concave platform 18 can enhance the bending strength of the middle part of the arc-shaped arm body 1; at the same time, a connection position is reserved for the welding positioning support plate 2, and the welding positioning support plate 2 cooperates with the arc-shaped arm body 1 to position and fix the nut 3 opposite to the middle mounting hole 17, so that only the fastening bolts are needed when assembling the control arm.
[0026] The above embodiments are used to illustrate the present invention by way of example, rather than to limit the present invention. Any person skilled in the art can modify the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the rights protection of the present invention shall be as listed in the claims of the present invention.
Claims
1. A control arm for an automotive chassis suspension system, comprising an arc-shaped arm body (1) formed by stamping a plate member. A circular bushing connection hole (11) is formed at the rear end of the arc-shaped arm body (1), and a semi-circular opening (12) is formed at the front end. It is characterized in that: An arc-shaped arm body (1) near the opening (12) is formed with a downwardly concave and circular front concave platform (13). A front mounting hole (14) is formed in the middle of the front concave platform (13). A conical convex ring (15) is formed by upsetting on the upper side edge of the front mounting hole (14). Internal threads are formed on the inside of the convex ring (15) and the front mounting hole (14). A middle concave platform (16) which is downwardly concave and circular is formed in the middle of the arc-shaped arm body (1). A middle mounting hole (17) is formed in the middle of the middle concave platform (16). A side concave platform (18) communicating with the middle concave platform (16) is formed on the arc-shaped arm body (1) on one side of the middle concave platform (16). A positioning support plate (2) is inserted into the side concave platform (18). The positioning support plate (2) is fixedly welded to the bottom surface of the side concave platform (18) by spot welding. One end of the positioning support plate (2) extends out of the side concave platform (18) and is located directly above the middle mounting hole (17) and is formed with an upwardly concave positioning groove (21). A nut (3) facing the middle mounting hole (17) is inserted into the positioning groove (21). The lower end surface of the nut (3) abuts against the bottom surface of the middle concave platform (16).
2. The control arm of an automotive chassis suspension system according to claim 1, wherein: An avoidance through hole (22) facing the middle mounting hole (17) is formed in the middle of the positioning groove (21) on the positioning support plate (2).
3. The control arm of an automotive chassis suspension system according to claim 1, characterized in that: The inner walls of the front mounting hole (14) and the convex ring (15) on the arc-shaped arm body (1) are in the same cylindrical surface.
4. A control arm of an automotive chassis suspension system according to claim 1, characterized in that: An arc-shaped rib groove (110) which is downwardly concave is formed on the arc-shaped arm body (1) between the front concave platform (13) and the inner side edge of the arc-shaped arm body (1).
5. The control arm of an automotive chassis suspension system according to claim 1, characterized in that: The depth of the side concave platform (18) on the arc-shaped arm body (1) is less than the depth of the middle concave platform (16).
6. The control arm of an automotive chassis suspension system according to claim 5, characterized in that: The thickness of the positioning support plate (2) is not greater than the depth of the side concave platform (18). The aperture of the middle mounting hole (17) on the middle concave platform (16) is smaller than the aperture of the front mounting hole (14).