Highly stable cushioned automotive suspension arm

Abstract

The utility model discloses a kind of high-stability buffering automobile suspension arms, including arm body and respectively being arranged in the ball head assembly of arm body each end portion, two bushing assemblies.The arm body is equipped with the connecting hole passing through arm body front and rear end surface at ball head assembly position, integrally formed counterweight is installed in the connecting hole by clearance fit;The counterweight includes circular ring bottom plate portion, annular flange portion protruding from bottom plate portion to one side and at least two arc flange portions located at the radial outer side of annular flange portion, the arc flange portion is connected with annular flange portion by radial connecting portion, and annular flange portion is higher than arc flange portion;The periphery of the connecting hole is also formed with mounting structure for installing damping component.The utility model is compact in structure, can effectively inhibit specific frequency vibration, improve ride smoothness and stability.

Description

Technical Field

[0001] This utility model relates to automobile suspension structure, and more particularly to a high-stability buffer automobile suspension arm. Background Technology

[0002] The suspension arm is a key guiding and force-transmitting component in the suspension system, and its performance directly affects the vehicle's handling stability and ride comfort. During vehicle operation, the suspension arm is subjected to continuous vibrations from the road surface and engine. These vibrations may cause resonance in the suspension arm itself or its connecting components, leading to increased cabin noise, shortened component fatigue life, and impacting handling feel.

[0003] To address vibration issues, conventional methods often involve installing independent damping blocks or dynamic vibration absorbers on large structures such as the vehicle body or frame. These solutions occupy significant space and are typically used as post-construction "remedial" measures, rather than being integrated with the suspension arm design. Their vibration reduction efficiency and integration need improvement. Therefore, there is an urgent need in this field for a suspension arm structure with built-in vibration suppression capabilities, a compact structure, and significant effectiveness. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a highly stable buffer car suspension arm that can effectively suppress vibrations at specific frequencies and improve driving smoothness and stability.

[0005] The technical solution of this utility model is as follows: The high-stability buffer automotive suspension arm of this utility model includes an arm body and ball joint assemblies and two bushing assemblies respectively disposed at each end of the arm body. The arm body is characterized by having a connecting hole penetrating the front and rear ends of the arm body near the ball joint assembly. An integrally formed counterweight block is installed in the connecting hole with a clearance fit. The counterweight block includes an annular base plate, an annular flange protruding from the base plate to one side, and at least two arcuate flanges located radially outside the annular flange. The arcuate flanges are connected to the annular flanges via a radial connecting portion, and the annular flange is higher than the arcuate flange. A mounting structure for installing shock-absorbing components is also formed around the connecting hole.

[0006] This structure maximizes mass distribution and rotational inertia within a limited space of connection holes by setting irregularly shaped counterweights with clearance fit at key vibration input locations. It achieves the best vibration absorption effect with a compact volume, integrates the mounting points of damping components, simplifies the surrounding layout, and improves the space utilization of the whole vehicle assembly.

[0007] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the arc-shaped flange portion is symmetrically distributed around the axis of the annular flange portion, ensuring the balance of the mass distribution of the counterweight during vibration, avoiding additional torque or abnormal noise due to asymmetry, and ensuring a smooth and efficient vibration reduction process.

[0008] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the surface of the base plate portion away from the annular flange portion is a conical surface.

[0009] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the mounting structure for installing the shock-absorbing component is a connecting bracket arranged around the connecting hole. This structure provides a stable support point for installing the shock-absorbing component, and the surrounding design allows it to be tightly integrated with the built-in counterweight in space, jointly strengthening the local structure.

[0010] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the connecting bracket is formed by the mating of an inverted U-shaped bracket portion and an arc-shaped bracket portion, and a pair of damping block mounting holes are provided at both ends of the inverted U-shaped bracket portion. The bracket shape combining the inverted U-shape and the arc shape can better adapt to the complex chassis space.

[0011] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the arm body has a welded tube at the end corresponding to each bushing assembly. Each bushing assembly includes an inner tube concentric with the welded tube and two rubber bushings. The two rubber bushings are pressed into the space between the inner tube and the welded tube from opposite axial ends, with an axial gap between the end faces of the two rubber bushings. This axial gap between the two rubber bushings creates a non-linear stiffness characteristic, making the bushing assembly soft and comfortable when facing small-amplitude high-frequency vibrations, while providing sufficient support and damping when facing large-amplitude low-frequency impacts, further improving the ride comfort and stability of the entire vehicle.

[0012] Furthermore, in the high-stability buffer automotive suspension arm described in this utility model, the rubber bushing includes an outer bushing tube, a rubber body, and an inner bushing tube. The ends of the outer bushing tube and the inner bushing tube located inside the welded tube are both chamfered and narrowed to facilitate press-fitting.

[0013] The beneficial effects of this utility model are: 1. This utility model incorporates a tuned mass damper, consisting of a connecting hole and a clearance-fitted counterweight, at the key vibration input point of the suspension arm (near the ball joint assembly), precisely dissipating specific vibration energy. This irregularly shaped counterweight, through its combination of annular and arc-shaped flanges, maximizes mass distribution and rotational inertia within the limited space of the connecting hole, thus achieving optimal vibration absorption with minimal volume. Simultaneously, the connecting bracket surrounding the connecting hole integrates the mounting points for the damping components, resulting in an extremely compact overall structure with diverse functions.

[0014] 2. The counterweight of this utility model adopts an integral molding process, and its arc-shaped flange is symmetrically distributed, the annular flange is higher than the arc-shaped flange, and the lower surface of the base plate is designed as a conical surface. These features together optimize the stress distribution of the counterweight itself, avoid local stress concentration, and ensure its structural integrity and fatigue durability under long-term high-frequency vibration, thereby improving the reliability and service life of the entire suspension arm.

[0015] 3. This utility model utilizes the guiding cone surface at the bottom of the counterweight and the chamfered and narrowed design of the inner and outer tubes of the bushing, which plays a key guiding role in the installation process, reduces the difficulty and risk of assembly, ensures product quality and improves production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the counterweight.

[0018] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0019] Figure 4 This is a cross-sectional view of the bushing assembly of this utility model. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings: Reference Figure 1 As shown in the figure, the high-stability buffer car suspension arm described in this embodiment includes an arm body 1 and ball joint assemblies 2 and two bushing assemblies 3 respectively disposed at each end of the arm body 1.

[0021] The arm body 1 is formed by stamping and welding steel plates. A circular connecting hole 4, penetrating the front and rear ends of the arm body 1, is machined in the stress concentration area near the ball joint assembly 2. A one-piece cast metal counterweight 5 is installed within this connecting hole 4 with a clearance fit. This clearance fit allows the counterweight 5 to move slightly within the hole, forming a tuned mass damper together with the hole wall.

[0022] Reference Figure 2The counterweight 5 includes an annular base plate 51, an annular flange 52 protruding to one side from the base plate 51, and at least two concentric arc-shaped flanges 53 located radially outside the annular flange 52. The annular flange 52 is higher than the arc-shaped flanges 53, forming a layout that is high in the center and low around the edges, which helps to avoid surrounding components and optimize mass distribution. The two arc-shaped flanges 53 are symmetrically distributed about the axis of the annular flange 52 and are connected to the annular flange 52 by a radial connection 54, ensuring balance and structural strength during vibration. The surface of the base plate 51 away from the annular flange 52 is a conical surface. This design can play a role in automatic guidance and correction during assembly, and can accommodate small impurities to avoid installation interference.

[0023] Combination Figure 1 and Figure 3 Furthermore, a mounting structure for installing vibration damping components is formed around the periphery of the connecting hole 4. Specifically, this mounting structure is a connecting bracket 6 welded around the connecting hole 4. The connecting bracket 6 is formed by the mating of an inverted U-shaped bracket portion 61 and an arc-shaped bracket portion 62, wherein the inverted U-shaped bracket portion 61 is higher and has a pair of vibration damping block mounting holes 61a at both ends for connecting vibration damping blocks.

[0024] Reference Figure 4 The arm body 1 has a welded tube 11 at the end of each bushing assembly 3. The bushing assembly 3 includes an inner tube 31 concentric with the welded tube 11 and two rubber bushings. The two rubber bushings are pressed into the inner tube 31 and the welded tube 11 from opposite ends along the axial direction, with an axial gap between the end faces of the two rubber bushings. Through the two-stage rubber bushing design, a nonlinear stiffness characteristic is formed and a larger total deformation stroke is provided, making the bushing soft and comfortable when dealing with small-amplitude high-frequency vibrations, and providing sufficient support and damping when facing large impacts. Specifically, the rubber bushing includes an outer bushing tube 33, a rubber body 34, and an inner bushing tube 32. The ends of the outer bushing tube 33 and the inner bushing tube 32 located inside the welded tube 11 are both formed with chamfered necks. This structure greatly reduces the resistance during the press-fitting process and facilitates press-fitting guidance.

[0025] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A high-stability buffer automotive suspension arm, comprising an arm body and ball joint assemblies and two bushing assemblies respectively disposed at each end of the arm body, characterized in that: The arm body is provided with a connecting hole that penetrates the front and rear ends of the arm body near the ball head assembly. An integrally formed counterweight is installed in the connecting hole with a clearance fit. The counterweight includes an annular base plate, an annular flange protruding from the base plate to one side, and at least two arcuate flanges located radially outside the annular flange. The arcuate flanges are connected to the annular flanges by a radial connecting part, and the annular flange is higher than the arcuate flange. A mounting structure for installing shock-absorbing components is also formed on the periphery of the connecting hole.

2. The high-stability buffer automotive suspension arm according to claim 1, characterized in that: The arc-shaped flange portions are symmetrically distributed around the axis of the annular flange portion.

3. The high-stability buffer automotive suspension arm according to claim 1, characterized in that: The surface of the base plate away from the annular flange is a conical surface.

4. The high-stability buffer automotive suspension arm according to claim 1, characterized in that: The mounting structure for installing the shock-absorbing components is a connecting bracket arranged around the connecting hole.

5. The high-stability buffer automotive suspension arm according to claim 4, characterized in that: The connecting bracket is formed by connecting an inverted U-shaped bracket part and an arc-shaped bracket part. A pair of shock-absorbing block mounting holes are opened at both ends of the inverted U-shaped bracket part.

6. The high-stability buffer automotive suspension arm according to claim 1, characterized in that: The arm body is provided with a welded tube at the end of each bushing assembly. The bushing assembly includes an inner tube concentric with the welded tube and two rubber bushings. The two rubber bushings are pressed into the inner tube and the welded tube from opposite ends in the axial direction, and an axial gap is left between the end faces of the two rubber bushings.

7. The high-stability buffer automotive suspension arm according to claim 6, characterized in that: The rubber bushing includes an outer bushing tube, a rubber body, and an inner bushing tube. The ends of the outer bushing tube and the inner bushing tube located inside the welded pipe are both chamfered and narrowed.

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