Automobile rear suspension forged steel control arm with unloading groove

Abstract

This utility model discloses a forged steel control arm for automotive rear suspension with an unloading groove, comprising a first control arm body and a second control arm body that can be adjusted to move relatively left and right. The first and second control arm bodies are connected and adjusted by an adjusting nut. A first connecting rod is horizontally arranged at one end of the first control arm body, and a ball joint seat is arranged at the other end of the first control arm body. An unloading groove is arranged on the left side of the first connecting rod, and a first threaded portion is arranged on the outer side wall of the first connecting rod. A second connecting rod is horizontally arranged at one end of the second control arm body, and a bushing is inserted into the other end of the second control arm body. A second threaded portion is arranged on the outer side wall of the second connecting rod. This utility model can solve the problems that existing forged steel control arms for automotive rear suspension cannot meet the requirements of complex motion trajectories of the connection end in high-end vehicle rear wheel steering technology, and lack overload protection leading to steering gear damage first and high maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of automotive control arm technology, specifically a forged steel control arm for automotive rear suspension with unloading groove. Background Technology

[0002] In automotive rear suspension systems, the forged steel control arm is a key component of the multi-link structure. Connected to the subframe at one end and the steering knuckle at the other, it bears the responsibility of force transmission and motion guidance. Currently, high-end vehicles widely employ rear-wheel steering technology to enhance handling agility and precision. This requires the connection between the control arm and the steering knuckle to have higher rotational freedom to accommodate the complex motion trajectory of rear-wheel steering. However, traditional control arm connection structures are relatively fixed, failing to provide sufficient rotational freedom for rear-wheel steering, easily leading to motion interference, sluggish steering response, and weakened overall vehicle handling performance. Furthermore, when the vehicle encounters lateral overload (such as emergency avoidance or high-speed cornering), traditional control arms lack targeted overload protection designs. The more valuable steering gear is prone to failure due to excessive load, significantly increasing after-sales maintenance costs and threatening driving safety. Additionally, during vehicle operation, tire wear and control arm deformation cause changes in positioning parameters such as rear wheel toe angle and camber angle. Traditional control arm center distances cannot be adjusted, making it difficult to correct these changes. Therefore, a forged steel control arm for automotive rear suspension with unloading grooves is designed to meet current usage requirements. Utility Model Content

[0003] This invention provides a forged steel control arm for automotive rear suspension with a load-relieving groove, which can solve the problems that existing forged steel control arms for automotive rear suspension cannot meet the requirements of high-end vehicle rear wheel steering technology for complex motion trajectories at the connection end, and lack overload protection, which leads to the steering gear being damaged first and high maintenance costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a forged steel control arm for automotive rear suspension with an unloading groove, comprising a first control arm body and a second control arm body that can be adjusted to move relatively left and right, the first control arm body and the second control arm body being connected and adjusted by an adjusting nut; a first connecting rod is horizontally arranged at one end of the first control arm body, a ball joint seat is arranged at the other end of the first control arm body, an unloading groove is arranged on the left side of the first connecting rod, and a first threaded portion is arranged on the outer side wall of the first connecting rod; a second connecting rod is horizontally arranged at one end of the second control arm body, and the other end of the second control arm body is inserted into... The second connecting rod has a bushing and a second threaded portion on its outer side wall. The second threaded portion rotates in the opposite direction to the first threaded portion. A ball cup is provided inside the ball pin seat, and a ball pin is movably disposed inside the ball cup. A cover plate is embedded in the upper end of the ball pin seat, and a dust cover is fitted on the bottom of the ball pin seat. The cover plate prevents the ball cup from falling out of the ball pin seat, and the dust cover prevents dust from entering the ball pin seat. The overall length of the control arm can be adjusted by turning the adjusting nut, thereby adjusting the wheel angle. The design of the unloading groove allows the part to bend preferentially when the vehicle is overloaded, preventing the steering gear from bending and being damaged first.

[0005] As a supplement to the technical solution described in this utility model, the ball pin includes a ball head and a ball pin rod connected to the ball head. A retaining edge is provided on the outer wall of the ball pin rod located in the ball pin seat to prevent the ball pin from disengaging from the ball pin seat.

[0006] As a supplement to the technical solution described in this utility model, the ball bowl is provided with an installation hole that matches the ball head, and the shape of the inner wall of the ball bowl matches the outer circumferential shape of the ball head of the ball pin, so that the ball head will not wobble due to gaps when rotating in the ball bowl.

[0007] As a supplement to the technical solution described in this utility model, the dust cover is fixed to the ball pin seat by a retaining ring, which is convenient to install. The dust cover is used to prevent dust from entering between the ball cup and the ball head. The upper end of the dust cover is provided with a groove for installing the retaining ring to prevent the retaining ring from shifting and affecting the dust cover from falling off, thus ensuring the dustproof performance of the dust cover.

[0008] As a supplement to the technical solution described in this utility model, a first locking nut and a second locking nut are respectively provided on the left and right sides of the adjusting nut. The first locking nut is screwed on the first connecting rod, and the second locking nut is screwed on the second connecting rod. By rotating the adjusting nut, the control arm is adjusted to the required length, and then the first locking nut and the second locking nut are tightened to abut against the end of the adjusting nut to lock the overall length of the control arm.

[0009] As a supplement to the technical solution described in this utility model, the first connecting rod and the second connecting rod are provided with limiting parts on their respective inner sides. The cross-section of the limiting parts is semi-circular to prevent the first connecting rod and the second connecting rod from rotating relative to each other during adjustment.

[0010] As a supplement to the technical solution described in this utility model, a mounting boss is provided on the upper side of the first control arm body, and two wire harness bracket mounting holes are arranged side by side on the mounting boss to facilitate the installation of wire harness brackets.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By setting up a first and second control arm body that can be relatively movable and adjustable, and utilizing the first and second connecting rods with reverse threads and the adjusting nut, the length of the control arm can be adjusted, thereby adjusting the rear wheel toe angle and camber angle, improving vehicle driving stability and handling precision. The unloading groove on the left side of the first connecting rod can preferentially bend under lateral overload conditions, protecting the more valuable steering gear and preventing it from bending and damaging first, significantly reducing after-sales maintenance costs and improving the overload protection performance of the control arm. This solves the problem that existing automotive rear suspension forged steel control arms cannot meet the requirements of high-end vehicle rear wheel steering technology for complex motion trajectories at the connection end, and lack overload protection leading to steering gear damage first and high repair costs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is an exploded view of the present invention;

[0016] Figure 4 This is a three-dimensional structural diagram of the first control arm body of this utility model;

[0017] Figure 5 This is a cross-sectional view of the ball pin of this utility model;

[0018] Figure 6 This is a three-dimensional structural diagram of the ball bowl of this utility model;

[0019] Figure 7 This is a three-dimensional structural diagram of the second control arm body of this utility model.

[0020] Figure label:

[0021] 1. First control arm body; 2. Second control arm body; 3. Adjusting nut; 4. First connecting rod; 5. Ball pin seat; 6. Unloading groove; 8. Second connecting rod; 9. Bushing; 10. Ball cup; 11. Ball pin; 12. Cover plate; 13. Dust cover; 14. Ball head; 15. Ball pin rod; 16. Side flange; 17. Mounting hole; 18. Snap ring; 19. First locking nut; 20. Second locking nut; 22. Limiting part; 23. Mounting boss; 24. Wiring harness bracket mounting hole. Detailed Implementation

[0022] 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.

[0023] The present invention relates to a forged steel control arm for automotive rear suspension with an unloading groove, such as... Figure 1-7 As shown, the control arm includes a first control arm body 1 and a second control arm body 2 that can be adjusted to move left and right relative to each other. The first control arm body 1 and the second control arm body 2 are connected and adjusted by an adjusting nut 3. A first connecting rod 4 is horizontally arranged at one end of the first control arm body 1, and a ball joint seat 5 is arranged at the other end of the first control arm body 1. A load-bearing groove 6 is arranged on the left side of the first connecting rod 4, and a first threaded part is arranged on the outer side wall of the first connecting rod 4. A second connecting rod 8 is horizontally arranged at one end of the second control arm body 2, and a bushing 9 is inserted into the other end of the second control arm body 2. The bushing 9 is interference-fitted with the second control arm body 2, and a second threaded part is arranged on the outer side wall of the second connecting rod 8. The second threaded part rotates in the opposite direction to the first threaded part; a ball cup 10 is provided inside the ball pin seat 5, and a ball pin 11 is movably provided inside the ball cup 10; a cover plate 12 is embedded in the upper end of the ball pin seat 5, and a dust cover 13 is fitted on the bottom of the ball pin seat 5. The cover plate prevents the ball cup from falling out of the ball pin seat, and the dust cover 13 prevents dust from entering the ball pin seat 5. The adjusting nut 3 is threadedly connected to the first connecting rod 4 and the second connecting rod 8 respectively; the overall length of the control arm is adjusted by turning the adjusting nut 3, thereby realizing the adjustment of the wheel angle. The design of the unloading groove 6 allows the part to bend preferentially when the vehicle is overloaded, avoiding the steering gear from bending and being damaged first.

[0024] In this embodiment, as Figure 2 As shown, the ball pin 11 includes a ball head 14 and a ball pin rod 15 connected to the ball head 14. A retaining edge 16 is provided on the outer wall of the ball pin rod 15 located in the ball pin seat 5 to prevent the ball pin from disengaging from the ball pin seat.

[0025] In this embodiment, as Figure 6As shown, the ball cup 10 is provided with a mounting hole 17 that is adapted to the ball head 14. The shape of the inner wall surface of the ball cup 10 is adapted to the outer peripheral shape of the ball head 14 of the ball pin, so that the ball head 14 will not wobble due to the gap when it rotates in the ball cup 10.

[0026] In this embodiment, as Figure 2 As shown, the dust cover 13 is fixed to the ball pin seat 5 by the retaining ring 18, which is convenient to install. The dust cover 13 is used to prevent dust from entering between the ball cup 10 and the ball head 14. The upper end of the dust cover 13 is provided with a groove for installing the retaining ring 18 to prevent the retaining ring 18 from shifting and affecting the dust cover 13 from falling off, thus ensuring the dustproof performance of the dust cover 13.

[0027] In this embodiment, as Figure 2 As shown, a first locking nut 19 and a second locking nut 20 are respectively provided on the left and right sides of the adjusting nut 3. The first locking nut 19 is screwed onto the first connecting rod 4, and the second locking nut 20 is screwed onto the second connecting rod 8. By rotating the adjusting nut 3, the control arm is adjusted to the required length. Then, the first locking nut 19 and the second locking nut 20 are tightened to abut against the end of the adjusting nut 3 to lock the overall length of the control arm.

[0028] In this embodiment, as Figure 4 and Figure 7 As shown, the first connecting rod 4 and the second connecting rod 8 are provided with limiting parts 22 on their respective inner sides. The cross-section of the limiting part 22 is semi-circular to prevent the first connecting rod 4 and the second connecting rod 8 from rotating relative to each other during adjustment.

[0029] In this embodiment, as Figure 4 As shown, the upper side of the first control arm body 1 is provided with a mounting boss 23, and two wire harness bracket mounting holes 24 are arranged side by side on the mounting boss 23 to facilitate the installation of wire harness brackets.

[0030] In this embodiment, as Figure 1 As shown, the first connecting rod 4 of the first control arm body 1 and the second connecting rod 8 of the second control arm body 2 are screwed into the two sides of the adjusting nut 3 using reverse threads. Rotating the adjusting nut 3 allows the two bodies to move relative to each other, adjusting the stroke. Tightening the first locking nut 19 and the second locking nut 20 ensures reliable locking. The assembled control arm is connected to the subframe through the bushing 9, and the ball pin 15 of the ball pin 11 is fitted and installed with the steering knuckle.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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 forged steel control arm for automotive rear suspension with an unloading groove, characterized in that, include: The first control arm body (1) and the second control arm body (2) can be adjusted to move relatively left and right. The first control arm body (1) and the second control arm body (2) are connected and adjusted by adjusting nut (3); A first connecting rod (4) is horizontally arranged at one end of the first control arm body (1), a ball pin seat (5) is arranged at the other end of the first control arm body (1), an unloading groove (6) is arranged on the left side of the first connecting rod (4), and a first threaded part is arranged on the outer side wall of the first connecting rod (4). A second connecting rod (8) is horizontally arranged at one end of the second control arm body (2), and a bushing (9) is inserted at the other end of the second control arm body (2). A second threaded part is provided on the outer side wall of the second connecting rod (8), and the thread rotation direction of the second threaded part is opposite to that of the first threaded part. A ball cup (10) is provided inside the ball pin seat (5), and a ball pin (11) is movably provided inside the ball cup (10). A cover plate (12) is embedded in the upper end of the ball pin seat (5), and a dust cover (13) is fitted on the bottom of the ball pin seat (5).

2. The forged steel control arm for automotive rear suspension with unloading groove according to claim 1, characterized in that: The ball pin (11) includes a ball head (14) and a ball pin rod (15) connected to the ball head (14). A retaining edge (16) is provided on the outer wall of the ball pin rod (15) located in the ball pin seat (5).

3. The forged steel control arm for automotive rear suspension with unloading groove according to claim 2, characterized in that: The ball cup (10) is provided with a mounting hole (17) that is adapted to the ball head (14).

4. The forged steel control arm for automotive rear suspension with unloading groove according to claim 1, characterized in that: The dust cover (13) is fixed to the ball pin seat (5) by a retaining ring (18).

5. The forged steel control arm for automotive rear suspension with unloading groove according to claim 1, characterized in that: The adjusting nut (3) is provided with a first locking nut (19) and a second locking nut (20) on its left and right sides respectively. The first locking nut (19) is screwed onto the first connecting rod (4), and the second locking nut (20) is screwed onto the second connecting rod (8).

6. The forged steel control arm for automotive rear suspension with unloading groove according to claim 1, characterized in that: The first connecting rod (4) and the second connecting rod (8) are provided with limiting parts (22) on their respective inner sides, and the cross section of the limiting parts (22) is semi-circular.

7. The forged steel control arm for automotive rear suspension with unloading groove according to claim 1, characterized in that: The upper side of the first control arm body (1) is provided with a mounting boss (23), and two wire harness bracket mounting holes (24) are arranged side by side on the mounting boss (23).

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