Automobile shock absorber bushing inner tube

Abstract

The utility model relates to the technical field of automobile shock absorber bushing, especially to an automobile shock absorber bushing inner tube, which comprises an inner tube body, the two ends of the inner tube body are provided with radial protruding limiting convex rings, the middle part is provided with a spherical boss, an axial limiting convex strip is connected between the spherical boss and the limiting convex ring, a plurality of axial first air holes are circumferentially and uniformly arranged on the inner tube body, a plurality of radial second air holes are axially and uniformly arranged on the outer circumferential surface of the inner tube body, one end of the second air hole is in communication with the first air hole, and the other end is in communication with the outside. The utility model is improved on the basis of the prior art, and through the synergistic effect of the limiting convex ring, the spherical boss and the limiting convex ring, axial deviation and relative rotation of the inner tube body and the rubber body are effectively prevented, and the working stability is improved. Through the cooperation of the first air hole, the second air hole, the third air hole, the air passage and the heat dissipation coating, the heat dissipation speed of the rubber body is significantly accelerated, the aging of the rubber body is delayed, and the service life of the bushing is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber bushing technology, and in particular to an inner tube for an automotive shock absorber bushing. Background Technology

[0002] Shock absorbers are used to suppress the oscillations caused by the rebound of the spring after absorbing shock and the impact from the road surface. They are widely used in automobiles to accelerate the attenuation of vibrations in the chassis and body, thereby improving the ride comfort of the car. Shock absorber bushings are the connecting parts between the two ends of the shock absorber and the car body. Automobile shock absorber bushings have the functions of buffering and shock absorption. Their main function is to connect the shock absorber and, when passing over speed bumps at the full pressure apex angle, to lift the car body up after the tires have fully touched the ground. Therefore, automobile shock absorber bushings are crucial to the driving experience of a car.

[0003] Existing automotive shock absorber bushings, such as the rear shock absorber bushing assembly disclosed in Chinese patent document CN201568519U, include a metal inner bushing and a rubber intermediate bushing. The rubber intermediate bushing is fitted over the inner bushing, and both the inner and rubber intermediate bushings are cylindrical and vulcanized together. A sleeve is fitted onto the rubber intermediate bushing with an interference fit. However, during vehicle bumps, the inner bushing and the rubber intermediate bushing are prone to axial displacement and relative rotation, making it difficult to ensure operational stability. Furthermore, the rubber generates a large amount of heat during repeated deformation; if heat cannot be dissipated in time, the rubber is prone to aging, thus affecting the service life of the bushing assembly.

[0004] Therefore, it is necessary to improve upon the shortcomings of the existing technologies mentioned above. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide an inner tube for an automotive shock absorber bushing, which addresses the shortcomings of the prior art and solves the problems of axial misalignment and relative rotation between the inner bushing and the rubber bushing, as well as poor heat dissipation leading to short service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an inner tube for an automotive shock absorber bushing, comprising an inner tube body, wherein the inner tube body is provided with radially protruding limiting rings at both ends and a spherical boss in the middle, and an axial limiting strip is connected between the spherical boss and the limiting rings; the inner tube body is provided with a plurality of axial first vent holes evenly distributed around its circumference; and the outer circumferential surface of the inner tube body is provided with a plurality of radial second vent holes evenly distributed along its axial direction, wherein one end of each second vent hole is connected to a first vent hole and the other end is connected to the outside.

[0007] Using the above technical solution, the limiting protrusion ring and the spherical protrusion can axially limit the rubber body and prevent axial displacement; the limiting protrusion strip can circumferentially limit the rubber body and prevent relative rotation, while enhancing the structural strength of the inner tube body; the first vent hole and the second vent hole cooperate to conduct the heat generated by the rubber body, accelerate heat dissipation, and thus extend the service life of the rubber body.

[0008] A further provision of the above technical solution is that a plurality of third vent holes are evenly distributed along the axial direction on the inner circumferential surface of the inner tube body, one end of the third vent hole being connected to the first vent hole and the other end being connected to the inner hole of the inner tube body.

[0009] By adopting the above technical solution, the third vent can divert the airflow from the first vent to the inner hole of the inner tube body, increasing the airflow and further improving the heat dissipation efficiency.

[0010] A further provision of the above technical solution is that: ventilation grooves connected to the first ventilation hole are provided on the two sides of the inner tube body.

[0011] By adopting the above technical solution, the ventilation groove can prevent the first ventilation hole from being blocked by the bolt after installation, ensuring the ventilation volume between the first ventilation hole and the outside, and accelerating the speed at which heat is dissipated from the first ventilation hole to the outside; in addition, the ventilation groove can also play a certain role in preventing the bolt from slipping.

[0012] A further provision of the above technical solution is that a heat dissipation coating is applied to the outer circumferential surface of the inner tube body by spraying or brushing.

[0013] By adopting the above technical solution, the heat dissipation coating can enhance the heat conduction capacity of the inner tube body, allowing the heat transferred from the rubber body to the inner tube body to dissipate into the air more quickly, thus delaying the aging of the rubber body.

[0014] The beneficial effects achieved by this utility model are: through the synergistic effect of the limiting protrusion ring, the spherical protrusion and the limiting protrusion ring, the axial displacement and relative rotation of the inner tube body and the rubber body are effectively prevented, thus improving working stability; through the cooperation of the first vent hole, the second vent hole, the third vent hole, the vent groove and the heat dissipation coating, the heat dissipation speed of the rubber body is significantly accelerated, the aging of the rubber body is delayed, and the service life of the bushing is extended. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0017] Figure 3 This is a cross-sectional view of an embodiment of the present invention after the rubber body has been assembled.

[0018] The markings in the diagram are: 1. Inner tube body; 11. Limiting protrusion; 12. Spherical protrusion; 13. Limiting protrusion; 14. First vent hole; 15. Second vent hole; 16. Third vent hole; 17. Vent groove; 2. Rubber body. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-3 As shown, an inner tube for an automotive shock absorber bushing includes an inner tube body 1. The inner tube body 1 has radially protruding limiting rings 11 at both ends and a spherical boss 12 in the middle. An axial limiting strip 13 connects the spherical boss 12 and the limiting rings 11. The inner tube body 1 has a plurality of axially distributed first vent holes 14 evenly distributed around its circumference. The outer circumferential surface of the inner tube body 1 has a plurality of radially distributed second vent holes 15 evenly distributed along its axial direction. One end of each second vent hole 15 is connected to a first vent hole 14, and the other end is connected to the outside. The inner circumferential surface of the inner tube body 1 has a plurality of axially distributed third vent holes 16 evenly distributed along its axial direction. One end of each third vent hole 16 is connected to a first vent hole 14, and the other end is connected to the inner hole of the inner tube body 1. Ventilation grooves 17 connected to the first vent holes 14 are provided on the side surfaces at both ends of the inner tube body 1. A heat-dissipating coating (not shown in the figure) is applied to the outer circumferential surface of the inner tube body 1 by spraying or brushing.

[0021] In the above embodiment, after the inner tube of the bushing is assembled, the rubber body 2 wraps around the outer part of the inner tube body 1. The limiting protrusion 11 and the spherical protrusion 12 restrict the axial movement of the rubber body 2, and the limiting protrusion 13 restricts the circumferential rotation of the rubber body 2, ensuring a stable connection. During operation, the heat generated by the repeated deformation of the rubber body 2 is transferred to the inner tube body 1. The heat dissipation coating enables the heat to be quickly conducted to the inner tube body. The heat enters the second vent 15 and flows into the first vent 14 and the third vent 16. The heat in the first vent 14 is quickly dissipated into the outside air through the vent groove 17, achieving efficient heat dissipation. Through the above structure, the working stability between the inner tube of the bushing and the rubber body is improved, and the service life of the rubber body is extended.

Claims

1. An inner tube for an automotive shock absorber bushing, comprising an inner tube body, characterized in that: The inner tube body has radially protruding limiting rings at both ends and a spherical boss in the middle. An axial limiting strip is connected between the spherical boss and the limiting rings. The inner tube body has several axial first vent holes evenly distributed around its circumference. The outer circumferential surface of the inner tube body has several radial second vent holes evenly distributed along its axial direction. One end of the second vent hole is connected to the first vent hole, and the other end is connected to the outside.

2. The inner tube of an automotive shock absorber bushing according to claim 1, characterized in that: The inner circumferential surface of the inner tube body is provided with a plurality of third vent holes evenly distributed along the axial direction. One end of each third vent hole is connected to the first vent hole and the other end is connected to the inner hole of the inner tube body.

3. The inner tube of an automotive shock absorber bushing according to claim 2, characterized in that: The inner tube body has ventilation grooves on both sides that are connected to the first ventilation hole.

4. The inner tube of an automotive shock absorber bushing according to any one of claims 1-3, characterized in that: The outer circumferential surface of the inner tube body is coated with a heat dissipation coating by spraying or brushing.

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