Shock absorber bushing

Abstract

The shock absorber bushing comprises an inner core, an assembly outer pipe is arranged on the outer circumferential surface of the inner core, the inner core comprises a core body and flat blocks integrally formed at the two ends of the core body, and an integrally formed limiting step is arranged in the middle of the core body. A limiting step is arranged between the inner core and the core body, rubber bushing pieces are arranged between the outer assembling pipe and the core body and located on the two sides of the limiting step, and the rubber bushing pieces are connected with the inner core and the outer assembling pipe in an interference fit mode. The limiting step on the inner core plays a role in radial large-load limiting and assembly limiting of the rubber bushing piece, the rubber bushing piece is effectively prevented from being seriously extruded or seriously stretched and torn, and then the durability of the shock absorber bushing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a shock absorber bushing. Background Art

[0002] As a key part of the chassis system, automobile suspension plays an important role in attenuating various road excitations. The quality of vibration reduction performance determines the handling stability, comfort and NVH performance of the entire vehicle. There are many factors that affect the performance of the suspension. Suspension bushings, as the connecting units of various components of the suspension system, are one of the most important factors affecting the NVH performance of the suspension. Shock absorber bushings are an important component of modern automobile suspension systems. Their main function is to provide more comfortable and stable support by reducing vibrations and impacts during vehicle driving. As one of the key components of the shock absorber, the shock absorber bushing plays a vital role in the performance of the entire shock absorber.

[0003] At present, both domestic and foreign countries are accelerating the research and development and progress of electric vehicles, seeking faster acceleration performance and more lasting endurance. Battery capacity is getting larger and larger, which will inevitably lead to electric vehicles becoming heavier than fuel vehicles, and thus bring severe challenges to the NVH tuning performance of the whole vehicle. Shock absorber bushings are required to meet the low stiffness and high vibration isolation comfort requirements of NVH tuning, as well as the high load durability requirements. Therefore, shock absorber bushings are proposed to solve this problem. Utility Model Content

[0004] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions:

[0005] The shock absorber bushing includes an inner core, an outer circumferential surface of the inner core is provided with an assembly outer tube, the inner core includes a core body and flat blocks integrally formed at both ends of the core body, the middle part of the core body is provided with an integrally formed limiting step, and rubber lining kits are provided between the assembly outer tube and the core body and on both sides of the limiting step, and the rubber lining kit is interference fit connected to the inner core and the assembly outer tube.

[0006] As an improvement of the above technical solution, the rubber assembly includes an outer sleeve, a middle sleeve and an inner sleeve coaxially arranged from the outside to the inside, and the outer sleeve and the middle sleeve, as well as the middle sleeve and the inner sleeve are filled with a rubber body. The outer sleeve, the middle sleeve and the inner sleeve are bonded into a whole by the rubber body.

[0007] As an improvement of the above technical solution, a positioning hole is provided on the flat block, and arc transitions are adopted between the flat block and the core body, and between the core body and the limiting step.

[0008] As an improvement of the above technical solution, the inner core, the outer sleeve, the middle sleeve and the inner sleeve are all made of metal.

[0009] As an improvement of the above technical solution, the outer diameter of the limiting step is between the outer diameter of the outer sleeve and the outer diameter of the inner sleeve.

[0010] Beneficial effects of the utility model:

[0011] The inner core is limited to improve the durability without improving the radial static performance. The limiting step on the inner core plays the role of radial heavy load limit and rubber bushing assembly limit, effectively preventing the rubber bushing from being severely squeezed or severely stretched and torn, thereby improving the durability of the shock absorber bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the main view of the overall structure of the utility model;

[0013] Figure 2 This is a schematic structural diagram of the rubber body of the utility model;

[0014] Figure 3 This is an exploded view of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the inner core of the utility model.

[0016] Figure numerals: 1, assembly outer tube; 2, outer sleeve; 3, rubber body; 4, middle sleeve; 5, inner sleeve; 6, inner core; 61, flat block; 62, core body; 63, limiting step. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] Ordinary shock absorber rubber bushings mainly meet the requirements of low radial static stiffness and low axial static stiffness, and conventional radial endurance load. They rarely meet the requirements of low radial static stiffness and high radial endurance load. This is difficult to achieve for ordinary rubber bushings without limit control. For heavier vehicles that want better driving control and comfort experience, high-performance shock absorber bushings are inevitable to meet the more stringent endurance performance requirements.

[0019] The shock absorber bushing includes an inner core 6, and an outer circumferential surface of the inner core 6 is provided with an assembly outer tube 1. The inner core 6 includes a core body 62 and flat blocks 61 integrally formed at both ends of the core body 62. An integrally formed limiting step 63 is provided in the middle of the core body 62. Rubber lining kits are provided between the assembly outer tube 1 and the core body 62 and on both sides of the limiting step 63. The rubber lining kit is interference fit connected to the inner core 6 and the assembly outer tube 1.

[0020] refer to Figure 1 、 Figure 3 as well as Figure 4 The inner core 6 is limited to improve the durability without improving the radial static performance. If the radial stiffness is too high, the vehicle will feel too stiff when driving, affecting the handling and driving experience. The limiting step 63 on the inner core 6 plays the role of radial heavy load limiting and rubber lining assembly limiting, effectively preventing the rubber lining from being severely squeezed or stretched and torn, thereby improving the durability of the shock absorber bushing. The outer tube 1, the rubber lining kit and the inner core 6 are assembled with an interference fit connection, which can meet the requirements of strength and pull-off force. The inner core 6 is designed with flat blocks 61 at both ends for contact and fixation with the vehicle body plane.

[0021] In one embodiment, reference Figure 1 as well as Figure 2 The rubber component includes an outer sleeve 2, a middle sleeve 4 and an inner sleeve 5 which are coaxially arranged from the outside to the inside. The outer sleeve 2 and the middle sleeve 4, as well as the middle sleeve 4 and the inner sleeve 5 are filled with a rubber body 3. The outer sleeve 2, the middle sleeve 4 and the inner sleeve 5 are bonded into a whole through the rubber body 3. When a large load is applied in the radial (main force) direction of the bushing, the limiting step 63 limits the rubber body 3, thereby reducing the damage to the rubber body 3 caused by the radial load, providing a large load limiting feature, ensuring the comfort of the stiffness of the front linear section of the bushing and the support of the rear nonlinear section, and improving the durability of the shock absorber bushing.

[0022] In one embodiment, reference Figure 4 The flat block 61 is provided with positioning holes, and two positioning holes are designed on the flat block to facilitate accurate positioning with the vehicle body boundary or control arm during customer installation and use to ensure the installation and use of the shock absorber bushing. Arc transitions are used between the flat block 61 and the core body 62, as well as between the core body 62 and the limiting step 63, to ensure that the core body 62 can provide sufficient strength support when bearing large loads.

[0023] In one embodiment, reference Figure 1 as well as Figure 3The inner core 6, outer sleeve 2, middle sleeve 4 and inner sleeve 5 are all made of metal. The inner core 6, inner sleeve 5, middle sleeve 4 and outer sleeve 2 are all made of iron, which is very helpful for the strength and collision fracture requirements of the whole vehicle.

[0024] In one embodiment, reference Figure 1 The outer diameter of the limiting step 63 is between the outer diameter of the outer sleeve 2 and the outer diameter of the inner sleeve 5, which can prevent the damping characteristics of the shock absorber bushing from being distorted due to excessive deformation of the rubber body 3 during operation.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. Shock absorber bushing, characterized in that, The invention comprises an inner core (6), wherein an outer circumferential surface of the inner core (6) is provided with an assembled outer tube (1), wherein the inner core (6) comprises a core body (62) and flat blocks (61) integrally formed at both ends of the core body (62), wherein an integrally formed limiting step (63) is provided in the middle of the core body (62), and rubber lining components are provided between the assembled outer tube (1) and the core body (62) and on both sides of the limiting step (63), wherein the rubber lining components are connected to the inner core (6) and the assembled outer tube (1) by interference fit.

2. The shock absorber bushing according to claim 1, characterized in that: The rubber component comprises an outer sleeve (2), a middle sleeve (4) and an inner sleeve (5) which are coaxially arranged in sequence from the outside to the inside; a rubber body (3) is used to fill the space between the outer sleeve (2) and the middle sleeve (4) and between the middle sleeve (4) and the inner sleeve (5); and the outer sleeve (2), the middle sleeve (4) and the inner sleeve (5) are bonded together into a whole by the rubber body (3).

3. The shock absorber bushing according to claim 2, characterized in that: A positioning hole is provided on the flat block (61), and arc transitions are used between the flat block (61) and the core body (62), and between the core body (62) and the limiting step (63).

4. The shock absorber bushing according to claim 2, characterized in that: The inner core (6), the outer sleeve (2), the middle sleeve (4) and the inner sleeve (5) are all made of metal.

5. The shock absorber bushing according to claim 1, characterized in that: The outer diameter of the limiting step (63) is between the outer diameter of the outer sleeve (2) and the outer diameter of the inner sleeve (5).

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