Upper suspension automobile lining

Abstract

The utility model relates to an upper suspension automobile bushing, which comprises an inner pipe, a plastic coating layer, a rubber layer and an outer ring, the outer peripheral surface of the inner pipe is provided with a convex block which protrudes outwards along the radial direction of the inner pipe, the plastic coating layer is coated on the outer peripheral surface of the inner pipe, the inner side surface of the plastic coating layer is provided with a groove matched with the convex block, the convex block is embedded in the groove, the outer peripheral surface of the plastic coating layer is a drum-shaped surface, and the rubber layer is arranged on the outer ring. The rubber layer is coated on the outer peripheral surface of the plastic coating layer, the inner side surface and the outer peripheral surface of the rubber layer are drum-shaped surfaces, and the outer ring is coated on the outer peripheral surface of the rubber layer. The upper suspension automobile lining can meet the use requirement of low rigidity in the longitudinal direction of an automobile, high-damping rubber is used in the vertical direction, impact loads in the vertical direction can be better absorbed, and comfort of a driver and passengers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an upper suspension automobile bushing. Background Art

[0002] As people's living standards improve, they pay more and more attention to the comfort performance of vehicles during driving.

[0003] Automotive suspension is a crucial component of driving comfort, and high-strength upper suspension bushings, acting as flexible, cushioning connectors between the vehicle body and the air suspension, significantly impact the vehicle's longitudinal comfort. Typically, to balance comfort and handling, low stiffness is required in the fore-and-aft direction, while high stiffness is required in the vertical direction. To meet these stiffness requirements, solid high-strength upper suspension bushings are designed. However, these bushings utilize a natural rubber formula, which achieves high vertical stiffness while maintaining comfort. However, they cannot meet the low stiffness requirements in the fore-and-aft (longitudinal) direction. Summary of the Invention

[0004] The purpose of the utility model is to provide an upper suspension automobile bushing which meets the use requirement of low rigidity in the longitudinal direction of an automobile, can better absorb the impact load in the vertical direction, and improve the comfort of the driver and passengers.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A top-suspended automobile bushing comprises an inner tube, a plastic coating layer, a rubber layer and an outer ring. The outer circumferential surface of the inner tube is provided with a protrusion protruding outward in its radial direction. The plastic coating layer is coated on the outer circumferential surface of the inner tube. The inner side surface of the plastic coating layer is provided with a groove matching the protrusion, and the protrusion is embedded in the groove. The outer circumferential surface of the plastic coating layer is a drum-shaped surface. The rubber layer is coated on the outer circumferential surface of the plastic coating layer. Both the inner side surface and the outer circumferential surface of the rubber layer are drum-shaped surfaces. The outer ring is coated on the outer circumferential surface of the rubber layer.

[0007] The first end of the outer peripheral surface of the inner tube forms two levels of first end stepped surfaces, and the plastic coating layer covers the first level of the first end stepped surface.

[0008] The first end of the rubber layer covers the first end stepped surface of the second level.

[0009] The second end of the outer circumferential surface of the inner tube forms a three-level second end step surface, and the plastic coating layer covers the first and second level second end step surfaces.

[0010] The second end of the rubber layer covers the second end stepped surface of the third layer.

[0011] A plurality of hollow protrusions are respectively provided on both end surfaces of the rubber layer.

[0012] The hollow protrusions are arc-shaped and distributed around the central axis of the rubber layer.

[0013] The cross section of the hollow protrusion is arched.

[0014] The curvature of the inner side surface of the rubber layer is greater than the curvature of the outer peripheral surface of the rubber layer.

[0015] Two ends of the outer ring protrude from two ends of the rubber layer. The second end of the outer peripheral surface of the outer ring is concave relative to the first end thereof and is provided with an annular groove.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the upper suspension automobile bushing of the present invention can meet the use requirements of low stiffness in the longitudinal direction of the automobile, and the use of high-damping rubber in the vertical direction can better absorb the impact load in the vertical direction, thereby improving the comfort of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 This is a schematic diagram of the appearance of the upper suspension automobile bushing of the present utility model.

[0018] Attachment Figure 2 This is a schematic AA cross-sectional view of the upper suspension automobile bushing of the present invention.

[0019] In the above figures: 1, inner tube; 2, plastic coating layer; 3, rubber layer; 4, outer ring. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0021] Example 1: As shown in the attached Figure 1 and attached Figure 2 As shown, an upper suspension automobile bushing includes an inner tube 1, a plastic coating layer 2, a rubber layer 3 and an outer ring 4.

[0022] The central hole in the inner tube 1 is a stepped hole, that is, the central hole is divided into two parts coaxially distributed along its axial direction, and the aperture of one part is larger than the aperture of the other part. The outer peripheral surface of the inner tube 1 is irregular in shape, and a protrusion extending along its circumferential direction is provided in the middle of the outer peripheral surface. The protrusion protrudes outward along the radial direction of the inner tube 1. The cross section of the protrusion is roughly a rounded rectangle. In addition, the first end of the outer peripheral surface of the inner tube 1 (corresponding to Figure 2 The second end of the outer circumference of the inner tube 1 (corresponding to the first end of the inner tube 1) is formed with two levels of first end step surfaces, the second level first end step surface is lower than the first level first end step surface, that is, closer to the central axis. Figure 2The second end in the middle is formed with three levels of second end stepped surfaces, wherein the first level second end stepped surface, the second level second end stepped surface and the third level second end stepped surface are successively lower.

[0023] The plastic overcoat 2 covers the outer circumference of the inner tube 1. The inner side of the plastic overcoat 2 is provided with a groove that matches the protrusion, and the protrusion fits into the groove. The outer circumference of the plastic overcoat 2 is a drum-shaped surface. At the first end of the inner tube 1, the plastic overcoat 2 covers the first-level first-end step surface; at the second end of the inner tube 1, the plastic overcoat 2 covers the first-level second-end step surface and the second-level second-end step surface.

[0024] The rubber layer 3 is coated over the outer circumference of the plastic-coated layer 2. Both the inner and outer surfaces of the rubber layer 3 are drum-shaped, with the inner surface of the rubber layer 3 having a greater curvature than the outer surface. At the first end of the inner tube 1, the first end of the rubber layer 3 is coated with the second-level first-end stepped surface; at the second end of the inner tube 1, the second end of the rubber layer 3 is coated with the third-level second-end stepped surface. Furthermore, multiple hollow protrusions are provided on each end surface of the rubber layer 3. These protrusions are arc-shaped and distributed around the central axis of the rubber layer 3, with a bow-shaped cross-section.

[0025] The outer ring 4 is coated on the outer circumference of the rubber layer 3, and both ends of the outer ring 4 protrude from both ends of the rubber layer 3. The second end of the outer circumference of the outer ring 4 is concave relative to the first end thereof and an annular groove is formed at the concave portion.

[0026] In the above solution, the inner tube 1 is constructed from 40CR high-strength alloy structural steel, which offers excellent tensile strength, yield strength, affordability, ease of processing, superior overall mechanical properties, and good hardenability. The overmolding layer 2 is constructed from PA6GF40 engineering plastic, which boasts high mechanical strength, rigidity, heat resistance, and low cost. The rubber layer 3 is constructed from NR natural rubber, offering excellent wear resistance and high elasticity. The outer ring 4 is constructed from 6082-T6 high-strength aluminum alloy, which offers high strength, excellent corrosion and oxidation resistance, and is easy to process and coat.

[0027] The processing steps of the above-mentioned upper suspension automobile bushing are as follows:

[0028] 1) Inner tube 1:

[0029] The cutting process is completed by CNC machine tools, followed by degreasing. After degreasing is completed, the surface is protected by zinc nickel again;

[0030] 2) Plastic coating layer 2:

[0031] Cleaning the surface: First, clean the surface of the object to be processed to ensure there is no dirt;

[0032] Adhesive coating: Apply a layer of adhesive such as epoxy resin or polyurethane to the surface of the object to increase adhesion;

[0033] Molding plastic coating 2: The object is placed in the mold, and through the action of heat and pressure, the adhesive is solidified and closely adheres to the surface of the object to form a layer of plastic;

[0034] Curing and treatment: After the plastic coating layer 2 is completely cured, other special treatments can be performed, such as high temperature resistance, wear resistance, etc., to achieve the required performance requirements;

[0035] 3) Outer ring 4:

[0036] The CNC machine tool first cuts the inner surface features of the outer ring 4. After the inner surface processing is completed, the entire part is sandblasted, then degreased to remove surface oil stains, and then the outer surface of the outer ring 4 is cut;

[0037] 4) Rubber layer 3: Spray specific glue on the inner surface of the outer ring 4 and the outer surface of the plastic coating layer 2, then place it in the mold, inject the flowing rubber, and vulcanize it into shape.

[0038] Through the above-mentioned upper suspension automobile bushing, a high-hardness and high-damping rubber layer 3 is used in the vertical direction of the entire vehicle. When subjected to vertical impact, the high-damping rubber can better suppress impact and resonance. Moreover, during driving, as the driving speed increases, the frequency of the entire vehicle will continue to increase. The high-damping rubber has a higher dynamic hardening level and the vertical dynamic stiffness is improved. Under certain circumstances, the up and down floating of the vehicle body is reduced, which greatly improves the driving experience.

[0039] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. An upper suspension automobile bushing, characterized in that: The upper suspension automobile bushing includes an inner tube, a plastic coating layer, a rubber layer and an outer ring. The outer peripheral surface of the inner tube is provided with a protrusion protruding outward along its radial direction. The plastic coating layer is coated on the outer peripheral surface of the inner tube. The inner side surface of the plastic coating layer is provided with a groove matching the protrusion. The protrusion is embedded in the groove. The outer peripheral surface of the plastic coating layer is a drum-shaped surface. The rubber layer is coated on the outer peripheral surface of the plastic coating layer. The inner side surface and outer peripheral surface of the rubber layer are both drum-shaped surfaces. The outer ring is coated on the outer peripheral surface of the rubber layer.

2. The upper suspension automobile bushing according to claim 1, characterized in that: The first end of the outer peripheral surface of the inner tube forms two levels of first end stepped surfaces, and the plastic coating layer covers the first level of the first end stepped surface.

3. The upper suspension automobile bushing according to claim 2, characterized in that: The first end of the rubber layer covers the first end stepped surface of the second level.

4. The upper suspension automobile bushing according to claim 1, characterized in that: The second end of the outer circumferential surface of the inner tube forms a three-level second end step surface, and the plastic coating layer covers the first and second level second end step surfaces.

5. The upper suspension automobile bushing according to claim 4, characterized in that: The second end of the rubber layer covers the second end stepped surface of the third layer.

6. The upper suspension automobile bushing according to claim 1, characterized in that: A plurality of hollow protrusions are respectively provided on both end surfaces of the rubber layer.

7. The upper suspension automobile bushing according to claim 6, characterized in that: The hollow protrusions are arc-shaped and distributed around the central axis of the rubber layer.

8. The upper suspension automobile bushing according to claim 6, characterized in that: The cross section of the hollow protrusion is arched.

9. The upper suspension automobile bushing according to claim 1, characterized in that: The curvature of the inner side surface of the rubber layer is greater than the curvature of the outer peripheral surface of the rubber layer.

10. The upper suspension automobile bushing according to claim 1, characterized in that: Two ends of the outer ring protrude from two ends of the rubber layer. The second end of the outer peripheral surface of the outer ring is concave relative to the first end thereof and is provided with an annular groove.

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