Sheet metal welding triangular arm
By locally reinforcing the structure and reducing weight on the triangular arm, the problem of increased weight caused by overall thickening was solved, achieving a lightweight and high-rigidity design, and optimizing the space utilization and material use of the triangular arm.
Patent Information
- Application Number
- CN202521940090.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-04
- Estimated Expiration
- 2035-09-10
AI Technical Summary
The existing triangular arm structure increases strength by thickening the upper and lower stamping plates as a whole, which leads to a significant increase in weight, goes against the trend of lightweighting in automobiles, and also results in material waste and performance redundancy.
The structure employs localized reinforcement, including an L-shaped reinforcing plate arranged on the inner wall of the lower plate stamping, and grooves and flange plates on the mounting pins. Combined with localized weight-reduction hole design, it enhances rigidity and reduces weight while maintaining the same plate thickness.
Without increasing weight, the rigidity and deformation resistance of the triangular arm are improved, stress distribution is optimized, spatial interference is avoided, and lightweight design is achieved.
Smart Images
Figure CN224588877U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts technology, specifically to a sheet metal welded triangular arm. Background Technology
[0002] In a MacPherson strut front suspension system, the control arm, as a core force-transmitting component, needs to connect to the steering knuckle at one end and to the subframe at both ends, while avoiding obstructions from surrounding components such as tires, wheel hubs, drive shafts, stabilizer bars, and steering tie rods. The overall installation space is extremely compact. Traditional control arms often use a hollow structure formed by welding upper and lower stamped plates. To meet strength requirements, current technology typically increases the overall plate thickness to improve load-bearing capacity. However, this thickening approach directly leads to a significant increase in the weight of the control arm, contradicting the industry trend of lightweighting in automobiles. Furthermore, overall thickening also results in material waste and increased costs, and it cannot optimize stress distribution in different parts of the control arm, leading to significant performance redundancy and design flaws. Utility Model Content
[0003] This utility model provides a sheet metal welded triangular arm, which can solve the problem that the existing triangular arm structure usually uses upper and lower stamping plates to be fastened and welded to form the control arm body. In order to improve the strength of the control arm body, the upper and lower stamping plates are often thickened as a whole, which leads to a significant increase in the weight of the control arm body.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a sheet metal welded triangular arm, comprising a control arm body with three arms, wherein a ball joint assembly, a front bushing, and a mounting pin are respectively provided at the ends of the three arms, and a hydraulic bushing assembly is fitted onto the mounting pin; the hydraulic bushing assembly includes a hydraulic bushing fitted onto the mounting pin, and a bushing mounting bracket is fitted onto the hydraulic bushing, wherein a subframe mounting hole is provided at the end of the bushing mounting bracket, and two second nuts are welded to the corresponding positions on the lower side of the bushing mounting bracket; the control arm body includes... The system includes an upper plate stamping and a lower plate stamping, which are fixed together by welding. A first reinforcing plate is welded to the lower plate stamping near the front bushing, and a second reinforcing plate is welded to the inner arc-shaped sidewall of the lower plate stamping. Through the interlocking welding of the upper and lower plate stampings, and with the local reinforcement of the first and second reinforcing plates, the rigidity of the control arm body is improved while maintaining the thickness of the base plates of the upper and lower plate stampings. At the same time, the weight is controlled to avoid excessive weight and spatial interference caused by overall thickening.
[0005] As a supplement to the technical solution described in this utility model, the ball joint assembly includes a ball seat, a ball pin, a dust cover, a retaining ring, a ball cup, and a cover plate. The side of the ball seat is provided with a connecting part extending towards the control arm body. The ball pin realizes the flexible connection between the triangular arm and the steering knuckle. The ball pin can rotate flexibly in the ball cup to transmit steering torque. The dust cover is used to prevent dust and mud from entering the ball joint and extend its service life.
[0006] As a supplement to the technical solution described in this utility model, the connecting part is connected to the control arm body by three bolts. The control arm body has bolt mounting holes for the bolts to pass through. Three first nuts are welded to the corresponding positions on the lower side of the lower plate stamping. The connecting part is placed on the upper side of the upper plate stamping. The bolts pass through the connecting part, the upper plate stamping, and the lower plate stamping and are connected to the nuts to fix the ball hinge assembly to the control arm body.
[0007] As a supplement to the technical solution described in this utility model, the first end of the mounting pin extends into the body of the control arm, a flange plate is fixedly provided on the mounting pin located on the side of the control arm body, the second end of the mounting pin is provided with a groove, and a first weight reduction hole is provided in the mounting pin, which can effectively reduce weight.
[0008] As a supplement to the technical solution described in this utility model, the upper and lower sides of the bushing mounting bracket are provided with rectangular holes, the front and rear sides of the bushing mounting bracket are provided with first flanges, and the bushing mounting bracket is provided with a second weight reduction hole near the subframe mounting hole. The bushing mounting bracket includes a welded and fixed upper bushing bracket, a lower bushing bracket, and a bushing sleeve. The hydraulic bushing is located inside the bushing sleeve and is interference-fitted with the bushing sleeve. The rectangular holes are used to weld the upper bushing bracket and the lower bushing bracket to the bushing sleeve to increase the connection strength. The second weight reduction hole achieves weight reduction. The subframe mounting hole and the second nut ensure a quick and accurate connection with the subframe.
[0009] As a supplement to the technical solution described in this utility model, the upper plate stamping and the lower plate stamping are provided with a third weight reduction hole near the front bushing. The edge of the third weight reduction hole is provided with a second flange extending inward. The third weight reduction hole can effectively reduce weight. The second flange compensates for the strength loss caused by the opening while the third weight reduction hole achieves weight reduction, and increases the bending strength around the third weight reduction hole.
[0010] As a supplement to the technical solution described in this utility model, the cross-section of the second reinforcing plate is L-shaped, and bosses are provided at both ends of the second reinforcing plate. The open end of the second reinforcing plate fits into the side wall contour of the lower plate stamping part and is welded together to form a cavity, which can effectively improve the strength of the control arm. The bosses play an auxiliary role in welding positioning.
[0011] As a supplement to the technical solution described in this utility model, the upper plate stamping and the lower plate stamping are provided with welding notches near the flange plate. The welding notches are used to weld the mounting pin, lengthen the weld, and increase the welding strength.
[0012] Compared with the prior art, the beneficial effects of this utility model are: The L-shaped second reinforcing plate is arranged and welded along the arc-shaped inner wall of the lower plate stamping part. This allows for localized reinforcement of the control arm body, rather than overall thickening, reducing the increase in part weight. Grooves are added to the mounting pins to reduce the pressing force during hydraulic bushing installation, preventing damage to the bushing's inner tube. The flange plate supports the sides of the hydraulic bushing, preventing the control arm body from deforming due to excessive force. This solves the problem that existing triangular arm structures typically use upper and lower stamping plates welded together to form the control arm body, and to improve the strength of the control arm body, often employ overall thickening of the upper and lower stamping plates, resulting in a significant increase in the weight of the control arm body. Attached Figure Description
[0013] Figure 1 This is a front perspective view of the present invention. Figure 2 This is a perspective view of the reverse side of this utility model; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the lower plate stamping part and the first and second reinforcing plates of this utility model. Figure 5 This is a three-dimensional structural diagram of the hydraulic bushing assembly of this utility model; Figure 6 This is a three-dimensional structural diagram of the hydraulic bushing assembly from different angles according to this utility model; Figure 7 This is a cross-sectional structural schematic diagram of the ball joint assembly of this utility model; Figure 8 This is a cross-sectional view of the mounting pin of this utility model.
[0014] Reference numerals: 1. Control arm body; 11. Upper plate stamping; 12. Lower plate stamping; 13. Welding notch; 14. Third weight reduction hole; 15. Second flange; 2. Ball joint assembly; 21. Ball seat; 22. Ball pin; 23. Dust cover; 24. Snap ring; 25. Ball cup; 26. Cover plate; 27. Connecting part; 3. Front bushing; 4. Hydraulic bushing assembly; 41. Hydraulic bushing; 42. Bushing mounting bracket; 43. Subframe mounting hole; 44. Second nut; 45. Rectangular hole; 46. First flange; 47. Second weight reduction hole; 5. Mounting pin; 51. Flange plate; 52. Groove; 53. First weight reduction hole; 6. First reinforcing plate; 7. Second reinforcing plate; 71. Boss; 8. First nut. Detailed Implementation
[0015] 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.
[0016] The embodiments of this utility model relate to a sheet metal welded triangular arm, such as... Figure 1-8 As shown, the control arm body 1 includes a control arm body 1 with three outriggers. A ball joint assembly 2, a front bushing 3, and a mounting pin 5 are respectively provided at the ends of the three outriggers. A hydraulic bushing assembly 4 is fitted onto the mounting pin 5. The hydraulic bushing assembly 4 includes a hydraulic bushing 41 fitted onto the mounting pin 5. A bushing mounting bracket 42 is fitted onto the hydraulic bushing 41. A subframe mounting hole 43 is provided at the end of the bushing mounting bracket 42. Two second nuts 44 are welded to the corresponding positions on the lower side of the bushing mounting bracket 42. The control arm body 1 includes an upper plate stamping part 11 and an upper plate stamping part 11 arranged opposite each other. The lower plate stamping part 12 is fixed to the upper plate stamping part 11 by welding. A first reinforcing plate 6 is welded to the lower plate stamping part 12 near the front bushing 3. A second reinforcing plate 7 is welded to the lower plate stamping part 12 along the arc-shaped inner sidewall. Through the fastening and welding of the upper plate stamping part 11 and the lower plate stamping part 12, and with the local reinforcement of the first reinforcing plate 6 and the second reinforcing plate 7, the rigidity of the control arm body 1 is improved while maintaining the thickness of the base plate of the upper plate stamping part 11 and the lower plate stamping part 12. At the same time, the weight is controlled to avoid excessive weight and spatial interference caused by overall thickening.
[0017] In this embodiment, as Figure 7 As shown, the ball joint assembly 2 includes a ball seat 21, a ball pin 22, a dust cover 23, a retaining ring 24, a ball cup 25, and a cover plate 26. The side of the ball seat 21 is provided with a connecting part 27 extending towards the control arm body 1. The ball pin 22 realizes the flexible connection between the triangular arm and the steering knuckle. The ball pin 22 can rotate flexibly in the ball cup 25 to transmit steering torque. The dust cover 23 is used to prevent dust and mud from entering the ball joint and extend its service life.
[0018] In this embodiment, as Figure 1 and Figure 7 As shown, the connecting part 27 is connected to the control arm body 1 by three bolts. The control arm body 1 has bolt mounting holes for the bolts to pass through. Three first nuts 8 are welded to the corresponding positions on the lower side of the lower plate stamping part 12. The connecting part 27 is mounted on the upper side of the upper plate stamping part 11. The bolts pass through the connecting part 27, the upper plate stamping part 11 and the lower plate stamping part 12 and are connected to the nuts 8, thus fixing the ball hinge assembly 2 to the control arm body 1.
[0019] In this embodiment, as Figure 8 As shown, the first end of the mounting pin 5 extends into the control arm body 1. A flange plate 51 is fixedly installed on the mounting pin 5 located on the side of the control arm body 1. A groove 52 is provided at the second end of the mounting pin 5. A first weight reduction hole 53 is provided in the mounting pin 5. The flange plate 51 increases the welding contact area with the control arm body 1. The flange plate 51 supports the side of the hydraulic bushing 41, preventing the control arm body 1 from being deformed by excessive force, and can effectively reduce weight.
[0020] In this embodiment, as Figure 5-6 As shown, the bushing mounting bracket 42 has rectangular holes 45 on both its upper and lower sides, and first flanges 46 on its front and rear sides. A second weight-reducing hole 47 is provided on the bushing mounting bracket 42 near the subframe mounting hole 43. The bushing mounting bracket 42 includes a welded and fixed upper bushing bracket, a lower bushing bracket, and a bushing sleeve. A hydraulic bushing 41 is located inside the bushing sleeve, and the hydraulic bushing 41 is interference-fitted with the bushing sleeve. The rectangular holes 45 are used to weld the upper and lower bushing brackets to the bushing sleeve, increasing the connection strength. The second weight-reducing hole 47 achieves weight reduction. The subframe mounting hole 43 and the second nut 44 ensure a quick and accurate connection with the subframe.
[0021] In this embodiment, as Figure 2 and Figure 4As shown, the upper plate stamping 11 and the lower plate stamping 12 are provided with a third weight-reducing hole 14 near the front bushing 3. The edge of the third weight-reducing hole 14 is provided with a second flange 15 extending inward. The third weight-reducing hole 14 can effectively reduce weight. The second flange 15 compensates for the strength loss caused by the opening while the third weight-reducing hole 14 reduces weight, and increases the bending strength around the third weight-reducing hole 14. The first reinforcing plate 6 and the second reinforcing plate 7 are located on both sides of the third weight-reducing hole 14. The two ends of the first reinforcing plate 6 are in contact with the contours of the two side walls of the lower plate stamping 12 near the front bushing 3. The cross-section of the second reinforcing plate 7 is L-shaped. The two ends of the second reinforcing plate 7 are provided with bosses 71. The open end of the second reinforcing plate 7 is in contact with the contour of the side wall of the lower plate stamping 12 and welded together to form a cavity, which can effectively improve the strength of the control arm. The bosses 71 play an auxiliary role in welding positioning.
[0022] In this embodiment, as Figure 2 As shown, the upper plate stamping 11 and the lower plate stamping 12 are provided with welding notches 13 near the flange plate 51. The welding notches 13 are used to weld the mounting pin 5, lengthen the weld, and increase the welding strength.
[0023] In this embodiment, as Figure 1 As shown, during assembly, the first reinforcing plate 6 is placed inside the lower plate stamping 12 at a preset position near the front bushing 3, conforming to the contour of the lower plate sidewall, and welded in place. The second reinforcing plate 7 is placed along the arc-shaped inner sidewall of the lower plate stamping 12, and after the L-shaped opening of the second reinforcing plate 7 conforms to the lower plate sidewall, it is welded in place. The first reinforcing plate 6 and the second reinforcing plate 7 are welded together to form the control arm body 1. The ball joint assembly 2 connection part 27 is installed on the lower side of the lower plate stamping 12 at the corresponding position. The first nut 8 is aligned with the center of the bolt mounting hole and welded in place. A front bushing sleeve is welded to the end of the support arm of the control arm body 1. The first end of the mounting pin 5 with the flange plate 51 is aligned with the end hole of the support arm of the control arm body 1. The flange plate 51 fits against the side wall of the control arm body 1. The mounting pin 5 is welded to the end of the control arm body 1 through the welding notch 13 and the flange plate 51. The front bushing 3 is press-fitted into the front bushing sleeve. The ball joint assembly 2 is assembled. The connecting part 27 of the ball joint assembly 2 is placed on the upper plate stamping part 11 of the control arm body 1, aligned with the bolt mounting hole, and three bolts are inserted to connect with the first nut 8. The upper bushing bracket, lower bushing bracket, and bushing sleeve are welded together to form a bushing mounting bracket 42. The hydraulic bushing 41 is installed inside the bushing sleeve. At the position corresponding to the subframe mounting hole 43 on the lower side of the bushing mounting bracket 42, the 2... The second nut 44 is aligned with the center of the hole and fixed by welding. The assembled hydraulic bushing assembly 4 is then placed on the mounting pin 5, and the mounting pin 5 is interference-fitted with the hydraulic bushing 41. 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.
[0024] 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.
[0025] 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.
[0026] 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 scope of protection claimed by this utility model.
Claims
1. A sheet metal welded triangular arm, characterized in that, include: The control arm body (1) has three arms, and ball joint assembly (2), front bushing (3) and mounting pin (5) are respectively provided on the ends of the three arms. Hydraulic bushing assembly (4) is sleeved on the mounting pin (5). The hydraulic bushing assembly (4) includes a hydraulic bushing (41) sleeved on the mounting pin (5), a bushing mounting bracket (42) sleeved on the hydraulic bushing (41), a subframe mounting hole (43) is provided at the end of the bushing mounting bracket (42), and two second nuts (44) are welded to the corresponding position on the lower side of the bushing mounting bracket (42). The control arm body (1) includes an upper plate stamping part (11) and a lower plate stamping part (12) arranged opposite to each other. A first reinforcing plate (6) is welded to the lower plate stamping part (12) near the front bushing (3), and a second reinforcing plate (7) is welded to the lower plate stamping part (12) along the arc-shaped inner sidewall.
2. The sheet metal welded triangular arm according to claim 1, characterized in that: The ball joint assembly (2) includes a ball seat (21), a ball pin (22), a dust cover (23), a retaining ring (24), a ball cup (25), and a cover plate (26). The side of the ball seat (21) is provided with a connecting part (27) extending toward the control arm body (1).
3. The sheet metal welded triangular arm according to claim 2, characterized in that: The connecting part (27) is connected to the control arm body (1) by three bolts. The control arm body (1) has bolt mounting holes for passing through the bolts. Three first nuts (8) are welded to the corresponding position on the lower side of the lower plate stamping part (12).
4. The sheet metal welded triangular arm according to claim 1, characterized in that: The first end of the mounting pin (5) extends into the control arm body (1), and a flange plate (51) is fixedly provided on the mounting pin (5) located on the side of the control arm body (1). The second end of the mounting pin (5) is provided with a groove (52), and a first weight reduction hole (53) is provided in the mounting pin (5).
5. The sheet metal welded triangular arm according to claim 1, characterized in that: The bushing mounting bracket (42) has rectangular holes (45) on its upper and lower sides, and first flanges (46) on its front and rear sides. A second weight reduction hole (47) is provided on the bushing mounting bracket (42) near the subframe mounting hole (43).
6. The sheet metal welded triangular arm according to claim 1, characterized in that: The upper plate stamping (11) and the lower plate stamping (12) are provided with a third weight reduction hole (14) near the front bushing (3), and the edge of the third weight reduction hole (14) is provided with a second flange (15) extending inward.
7. The sheet metal welded triangular arm according to claim 1, characterized in that: The second reinforcing plate (7) has an L-shaped cross section, and bosses (71) are provided at both ends of the second reinforcing plate (7).
8. The sheet metal welded triangular arm according to claim 1, characterized in that: The upper plate stamping (11) and the lower plate stamping (12) are provided with welding notches (13) near the flange plate (51).