An adjustable suspension arm bushing

Abstract

This utility model relates to an adjustable suspension arm bushing, comprising an inner bushing tube, an outer bushing tube, and a rubber body. The outer surface of the inner bushing tube is threaded, and the outer bushing tube is coaxially sleeved on the inner bushing tube. The rubber body is bonded between the inner and outer bushing tubes, and both ends of the rubber body have axially protruding bosses. A first limiting block and a second limiting block are screwed onto both ends of the inner bushing tube, respectively. By adjusting the screw-in depth of the first and second limiting blocks, the compression of the bosses is changed, thereby adjusting the axial stiffness of the suspension arm bushing. The advantages of this utility model are that it can reduce development costs and time, and improve adjustment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chassis suspension technology, specifically to an adjustable suspension arm bushing. Background Technology

[0002] The rubber bushings of the chassis suspension are the soft hinge points connecting the suspension arms and the vehicle frame. They are used to improve vehicle handling, ride comfort, and NVH performance, and are a key focus of chassis tuning. Tuning engineers achieve these performance targets by properly matching the stiffness of the bushings.

[0003] There are two main methods for adjusting the axial stiffness of existing suspension bushings: the first is to adjust the bushing's axial stiffness by changing the hardness of the rubber compound; the second is to adjust the bushing's axial stiffness through structural redesign. Both methods require re-matching materials or redesigning the structure, necessitate suppliers to debug multiple rubber compound formulations, are time-consuming, and incur high debugging costs and lengthy design cycles for tuning components. These high debugging and mold costs further increase product development costs. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable suspension arm bushing that can reduce development costs and time, and improve tuning efficiency.

[0005] An adjustable suspension arm bushing, comprising:

[0006] The inner tube of the bushing has threads on its outer surface;

[0007] The outer bushing tube is coaxially sleeved on the inner bushing tube;

[0008] A rubber body is bonded between the inner tube and the outer tube of the bushing, and the two ends of the rubber body are provided with axially protruding bosses;

[0009] The inner tube of the bushing is screwed to both ends with a first limiting block and a second limiting block, respectively. By adjusting the screwing depth of the first limiting block and the second limiting block, the compression of the boss is changed, thereby adjusting the axial stiffness of the suspension arm bushing.

[0010] In the above solution, by setting adjustable first and second limiting blocks at both ends of the inner tube of the bushing, the compression of the rubber body's boss can be flexibly adjusted according to requirements, thus achieving convenient adjustment of the bushing's axial stiffness. Compared to traditional stiffness adjustment methods that require changing the rubber formula or redesigning the structure, this solution avoids complex rubber compound testing and mold modification processes, significantly reducing development costs and time. Testers can directly adjust the stiffness on the existing bushing; the deeper the first and second limiting blocks are screwed in, the greater the compression of the rubber body's boss, resulting in a higher stiffness value and significantly improving adjustment efficiency. This design solves the problems of high cost and long cycle time in existing suspension arm bushing stiffness adjustment, providing a more flexible and economical solution for chassis tuning.

[0011] Furthermore, the boss has a triangular cross-section.

[0012] In the above scheme, a triangular cross-section boss design is adopted. When used in conjunction with an adjustable first or second limit block, it can produce progressive stiffness characteristics. When the suspension arm undergoes axial displacement, the inclined surface of the triangular boss first contacts the first or second limit block. As the compression increases, the contact area gradually expands, so that the stiffness exhibits a smooth nonlinear growth.

[0013] Furthermore, the protrusion is provided with a frustum-shaped groove, and the first limiting block and the second limiting block are provided with protruding structures corresponding to the positions of the groove.

[0014] In the above scheme, by setting a frustum-shaped groove on the rubber body protrusion and setting matching protrusions at corresponding positions of the first and second limiting blocks, a more precise stiffness adjustment effect is achieved. When the first and second limiting blocks are screwed in, their protrusions first contact the bottom of the groove to form an initial preload, ensuring stiffness stability under small displacement conditions. As the compression increases, the contact area between the protrusions and the groove gradually expands, making the stiffness change more linear and controllable.

[0015] Furthermore, both the inner walls of the first limiting block and the second limiting block are provided with internal threads.

[0016] In the above scheme, by setting internal threads on the inner walls of the first and second limiting blocks, which cooperate with the threads on the outer surface of the bushing inner tube, precise controllability of stiffness adjustment is achieved. This threaded connection method allows for micron-level precise adjustment of the screw-in depth of the limiting blocks, thereby enabling fine adjustment of the bushing's axial stiffness. Compared to other connection methods, the threaded structure has a self-locking characteristic, ensuring that the adjusted positions of the first and second limiting blocks remain stable during long-term use, avoiding displacement caused by vibration. Furthermore, this design makes adjustment simple and easy, requiring only standard tools, greatly improving adjustment efficiency.

[0017] Furthermore, the rubber body is bonded to the inner and outer bushing tubes of the bushing through vulcanization.

[0018] In the above solution, a high-strength and durable connection between the metal and rubber components is achieved by using a vulcanization process to bond the rubber body to the inner and outer bushing tubes. This vulcanization bonding method forms a molecular-level bond between the rubber body and the metal tube, which not only ensures the effective transfer of loads but also significantly improves the peel strength of the bonding surface. Compared with traditional adhesive or mechanical fastening connection methods, the vulcanization process enables the rubber body to better withstand multi-directional alternating loads and effectively avoids the delamination problem that may occur during long-term use.

[0019] Furthermore, the first limiting block and the second limiting block are respectively provided with a first through hole and a second through hole, and the inner tube of the bushing passes through the first through hole and the second through hole respectively.

[0020] In the above scheme, by setting a first through hole and a second through hole on the first limiting block and the second limiting block, the inner tube of the bushing can pass through the first limiting block and the second limiting block, thereby achieving the integrity and stability of the structure. This through-hole design effectively enhances the connection strength between the first limiting block and the second limiting block and the inner tube of the bushing, prevents skewing or loosening during the adjustment process, and ensures the accuracy of stiffness adjustment. The structure of the first through hole and the second through hole allows the first limiting block and the second limiting block to be accurately positioned along the axial direction of the inner tube of the bushing, avoiding assembly errors, and facilitating the centering operation during adjustment.

[0021] This utility model provides an adjustable suspension arm bushing that effectively reduces development costs and time, while improving adjustment efficiency. By setting adjustable first and second limiting blocks at both ends of the bushing's inner tube, the compression of the rubber boss can be flexibly adjusted as needed, thus achieving convenient adjustment of the bushing's axial stiffness. Compared to traditional stiffness adjustment methods that require changing the rubber formulation or redesigning the structure, this solution avoids complex rubber compound adjustments and mold modifications, significantly reducing development costs and time. Testers can directly adjust the stiffness on the existing bushing; the deeper the first and second limiting blocks are screwed in, the greater the compression of the rubber boss, resulting in a higher stiffness value and significantly improved adjustment efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an adjustable suspension arm bushing according to one embodiment.

[0023] Figure 2 for Figure 1 Sectional view at point AA.

[0024] Figure 3 This is a schematic diagram of a groove structure according to one embodiment.

[0025] Figure 4 This is a schematic diagram of a protruding structure according to one embodiment.

[0026] Explanation of reference numerals in the attached diagram: 1. Inner tube of bushing; 2. Outer tube of bushing; 3. Rubber body; 31. Boss; 32. Groove; 4. First limiting block; 5. Second limiting block; 6. Protruding structure. Detailed Implementation

[0027] The adjustable suspension arm bushing of this utility model will be described in further detail below with reference to specific embodiments and accompanying drawings.

[0028] like Figure 1 and Figure 2 As shown in a preferred embodiment, an adjustable suspension arm bushing of the present invention includes an inner bushing tube 1, an outer bushing tube 2, and a rubber body 3. The outer surface of the inner bushing tube 1 is provided with threads. The outer bushing tube 2 is coaxially sleeved on the inner bushing tube 1. The rubber body 3 is bonded between the inner bushing tube 1 and the outer bushing tube 2. Both ends of the rubber body 3 are provided with axially protruding bosses 31. The two ends of the inner bushing tube 1 are respectively screwed with a first limiting block 4 and a second limiting block 5. By adjusting the screwing depth of the first limiting block 4 and the second limiting block 5, the compression amount of the bosses 31 is changed to adjust the axial stiffness of the suspension arm bushing.

[0029] In the above embodiment, by setting an adjustable first limiting block 4 and a second limiting block 5 at both ends of the inner tube 1 of the bushing, the compression of the boss 31 of the rubber body 3 can be flexibly adjusted according to requirements, thereby achieving convenient adjustment of the bushing's axial stiffness. Compared with the traditional stiffness adjustment method that requires changing the rubber formula or redesigning the structure, this solution avoids the complex rubber compound debugging and mold modification process, significantly reducing development costs and time. Testers can directly adjust the stiffness on the existing bushing. The deeper the first limiting block 4 and the second limiting block 5 are screwed in, the greater the compression of the boss 31 of the rubber body 3, resulting in a larger stiffness value and significantly improving adjustment efficiency. This design solves the problems of high cost and long cycle in existing suspension arm bushing stiffness adjustment, providing a more flexible and economical solution for chassis adjustment.

[0030] like Figure 1 and Figure 2 As shown, in some embodiments, the boss 31 has a triangular cross-section. When the boss 31 with a triangular cross-section is used in conjunction with the adjustable first limiting block 4 or the second limiting block 5, it can produce progressive stiffness characteristics. When the suspension arm undergoes axial displacement, the inclined surface of the triangular boss 31 first contacts the first limiting block 4 or the second limiting block 5. As the compression increases, the contact area gradually expands, resulting in a smooth nonlinear increase in stiffness.

[0031] like Figure 3 and Figure 4As shown, in some embodiments, the boss 31 is provided with a frustum-shaped groove 32, and the first limiting block 4 and the second limiting block 5 are provided with protruding structures 6 at the positions corresponding to the groove 32. By providing a frustum-shaped groove 32 on the boss 31 of the rubber body 3 and providing matching protruding structures 6 at the corresponding positions of the first limiting block 4 and the second limiting block 5, a more precise stiffness adjustment effect is achieved. When the first limiting block 4 and the second limiting block 5 are screwed in, their protruding structures 6 first contact the bottom of the groove 32 to form an initial pre-compression, ensuring stiffness stability under small displacement conditions; as the compression increases, the contact area between the protruding structure 6 and the groove 32 gradually expands, making the stiffness change more linear and controllable.

[0032] In this embodiment, the mating method of the groove 32 and the protrusion structure 6, compared to the planar contact method, can more precisely control the compression deformation process of the rubber body 3, avoid local stress concentration, and significantly improve the durability of the bushing. Simultaneously, the frustum-shaped geometric design provides self-centering during assembly, reducing the installation accuracy requirements. While maintaining ease of adjustment, this structure further optimizes the mechanical properties of the bushing, making stiffness adjustment more precise and smooth, and providing superior dynamic performance for the suspension system.

[0033] In some embodiments, the inner walls of both the first limiting block 4 and the second limiting block 5 are provided with internal threads. By providing internal threads on the inner walls of the first limiting block 4 and the second limiting block 5, which cooperate with the threads on the outer surface of the bushing inner tube 1, precise controllability of stiffness adjustment is achieved. This threaded connection method allows for precise adjustment of the screw-in depth of the limiting blocks at the micrometer level, thereby achieving fine adjustment of the axial stiffness of the bushing. Compared with other connection methods, the threaded structure has a self-locking characteristic, which ensures that the adjusted positions of the first limiting block 4 and the second limiting block 5 remain stable during long-term use, avoiding displacement caused by vibration. At the same time, this design makes the adjustment operation simple and easy, requiring only standard tools, greatly improving the adjustment efficiency.

[0034] like Figure 2 As shown, in some embodiments, the rubber body 3 is bonded to the inner bushing tube 1 and the outer bushing tube 2 by vulcanization. By using a vulcanization process to bond the rubber body 3 to the inner bushing tube 1 and the outer bushing tube 2, a high-strength and durable connection between the metal and rubber components is achieved. This vulcanization bonding method forms a molecular-level bond between the rubber body 3 and the metal tube, which not only ensures the effective transfer of loads but also significantly improves the peel strength of the bonding surface. Compared with traditional adhesive or mechanical fastening connection methods, the vulcanization process enables the rubber body 3 to better withstand multi-directional alternating loads and effectively avoids the delamination problem that may occur during long-term use.

[0035] In some embodiments, the first limiting block 4 and the second limiting block 5 are respectively provided with a first through hole and a second through hole, through which the inner tube 1 of the bushing passes. By providing the first through hole and the second through hole on the first limiting block 4 and the second limiting block 5, the inner tube 1 of the bushing can pass through the first limiting block 4 and the second limiting block 5, thereby achieving the integrity and stability of the structure. This through-hole design effectively enhances the connection strength between the first limiting block 4 and the second limiting block 5 and the inner tube 1 of the bushing, preventing skewing or loosening during adjustment and ensuring the accuracy of stiffness adjustment. The structure of the first through hole and the second through hole allows the first limiting block 4 and the second limiting block 5 to be accurately positioned along the axial direction of the inner tube 1 of the bushing, avoiding assembly errors and facilitating centering operations during adjustment.

[0036] The present invention relates to the working principle and process of an adjustable suspension arm bushing. By setting an adjustable first limiting block 4 and a second limiting block 5 at both ends of the inner tube 1 of the bushing, the compression of the protrusion 31 of the rubber body 3 can be flexibly adjusted according to the requirements. Testers can directly adjust the stiffness on the existing bushing. The deeper the first limiting block 4 and the second limiting block 5 are screwed in, the greater the compression of the rubber protrusion 31 and the greater the stiffness value generated, which greatly improves the adjustment efficiency.

[0037] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An adjustable suspension arm bushing, characterized in that, include: The inner tube of the bushing has threads on its outer surface; The outer bushing tube is coaxially sleeved on the inner bushing tube; A rubber body is bonded between the inner tube and the outer tube of the bushing, and the two ends of the rubber body are provided with axially protruding bosses; The inner tube of the bushing is screwed to both ends with a first limiting block and a second limiting block, respectively. By adjusting the screwing depth of the first limiting block and the second limiting block, the compression of the boss is changed, thereby adjusting the axial stiffness of the suspension arm bushing.

2. The adjustable suspension arm bushing according to claim 1, characterized in that, The boss has a triangular cross-section.

3. The adjustable suspension arm bushing according to claim 1, characterized in that, The protrusion is provided with a frustum-shaped groove, and the first limiting block and the second limiting block are provided with protruding structures corresponding to the position of the groove.

4. The adjustable suspension arm bushing according to claim 1, characterized in that, The inner walls of both the first limiting block and the second limiting block are provided with internal threads.

5. The adjustable suspension arm bushing according to claim 1, characterized in that, The rubber body is bonded to the inner and outer bushing tubes by vulcanization.

6. The adjustable suspension arm bushing according to claim 1, characterized in that, The first limiting block and the second limiting block are respectively provided with a first through hole and a second through hole, and the inner tube of the bushing passes through the first through hole and the second through hole respectively.

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