CN219197978U

CN219197978U - High-strength bushing of air suspension guide arm

Info

Publication number: CN219197978U
Application number: CN202223364372.1U
Authority: CN
Inventors: 余明德; 王新成
Original assignee: Zhenjiang Baohua Semi Trailer Parts Co ltd
Current assignee: Zhenjiang Baohua Semi Trailer Parts Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-06-16
Anticipated expiration: 2032-12-15

Abstract

The utility model discloses a high-strength bushing of an air suspension guide arm, which comprises an outer steel sleeve and an inner steel sleeve connected in the outer steel sleeve, wherein a rubber body is connected between the inner steel sleeve and the outer steel sleeve, the rubber body is attached to a convex surface arranged on the outer side of the inner steel sleeve, and the inner steel sleeve is connected to a bracket through a pin shaft. The rubber body has large volume and small volume at the left end and the right end, so that when the rubber body bears deformation, the two ends have larger deformation relative to the middle part, thereby leading the high-strength bushing to bear larger unbalanced load based on the neutral plane of the bushing, leading the inner lining plate and the inner steel sleeve of the bushing to have larger friction coefficient and transmitting larger friction force, leading the inner lining plate and the inner steel sleeve not to slip easily, reducing the risk of loosening the pin shaft of the guide arm caused by abrasion between the inner lining plate and the inner steel sleeve, and improving the driving safety.

Description

High-strength bushing of air suspension guide arm

Technical Field

The utility model relates to the technical field of commercial vehicle suspension structures, in particular to a high-strength bushing of an air suspension guide arm.

Background

The air suspension of the existing commercial vehicle is provided with a rubber-steel composite bushing for vibration reduction at the position of the guide arm rolling lug. Because commercial vehicles are often heavily loaded, the composite bushings at the guide arm drums need to withstand large vertical loads, side loads, and torque, and also need some damping capacity to improve cargo safety and driving comfort.

The inner and outer rings of the existing composite bushing are steel sleeves with equal thickness, so that when the bushing bears vertical load, lateral load and torque at the same time, the deformation of the inner part of the middle rubber body is inconsistent, the rubber body is easy to age, and part of the rubber bodies on the two side surfaces are extruded from gaps of the inner and outer steel sleeves to be torn and damaged, so that the bearing capacity and the service life of the composite bushing are affected; on the other hand, because the end surface ring surface area of the inner steel sleeve of the composite bushing is small and is smooth, when the composite bushing is matched with the inner lining plate of the air suspension spring bracket, the friction force between the inner lining plate and the inner steel sleeve of the bushing is small, and when the bushing bears torque, the friction surface between the inner lining plate and the inner steel sleeve is easy to slip, so that the inner lining plate is worn, the pin shaft of the guide arm is loosened, and the driving safety is influenced.

Disclosure of Invention

The utility model aims to provide a high-strength bushing of an air suspension guide arm, which has the advantages of bearing larger unbalanced load and improving driving safety, and solves the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high strength bush of air suspension guide arm, includes outer steel bushing and connects the interior steel bushing in outer steel bushing, be connected with the rubber body between interior steel bushing and the outer steel bushing, the rubber body laminates mutually with the boss face that sets up in the interior steel bushing outside, interior steel bushing passes through the round pin hub connection in the support, and the both ends face of interior steel bushing is provided with the friction surface.

Preferably, the two ends of the outer steel sleeve are connected with turned edges, and the turned edges are turned towards the direction of the end part close to the rubber body.

Preferably, the outer steel sleeve is connected with the rubber body through an adhesive.

Preferably, flanges are connected to two ends of the inner steel sleeve, and the inner sides of the flanges are attached to the rubber body.

Preferably, the friction surface is a plurality of concave surfaces, and the friction surface is connected with the inner lining plate.

Preferably, grooves are formed in two ends of the rubber body, and the grooves are of annular structures.

Preferably, the convex surface is in a waist drum shape.

Preferably, the inner steel sleeve is internally provided with a mounting hole.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the rubber body is arranged and is attached to the convex surface arranged on the outer side of the inner steel sleeve, the convex surface is in a waist drum shape, the rubber volume at the left end and the right end of the rubber body is large, and the middle is small, so that when the rubber body bears deformation, the two ends have larger deformation relative to the middle part, and the high-strength bushing can bear larger unbalanced load based on the neutral plane of the bushing.

The friction surfaces are arranged on the two end surfaces of the inner steel sleeve, the friction surfaces are a plurality of concave surfaces, so that a larger friction coefficient can be formed between the inner lining plate and the inner steel sleeve of the lining sleeve, and a larger friction force can be transmitted, so that the inner lining plate and the inner steel sleeve are not easy to slip, the risk of loosening a pin shaft of the guide arm due to abrasion between the inner lining plate and the inner steel sleeve is reduced, and the driving safety is improved.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the present utility model mounted on a bracket;

FIG. 4 is a partial cross-sectional view of FIG. 3;

fig. 5 is a schematic view showing the connection structure of the inner steel jacket and the inner liner plate according to the present utility model.

In the figure: 1. an inner steel sleeve; 2. a rubber body; 3. an outer steel jacket; 4. a friction surface; 5. flanging; 6. a flange; 7. a groove; 8. an adhesive; 9. a convex surface; 10. a mounting hole; 11. an inner liner; 12. a bracket; 13. a guide arm.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 5, the utility model provides a high-strength bushing of an air suspension guide arm, which comprises an outer steel sleeve 3 and an inner steel sleeve 1 connected in the outer steel sleeve 3, wherein a rubber body 2 is connected between the inner steel sleeve 1 and the outer steel sleeve 3, the rubber body 2 and the inner steel sleeve 1 are vulcanized into a whole by an injection molding method, and the rubber body 2 is subjected to several processes of mixing natural rubber according to a certain formula, re-kneading and injection molding, so that the hardness of the rubber body 2 is controlled to be Shore hardness SHA 70+/-3, the tensile strength is more than or equal to 21MPa, the elongation at break is more than or equal to 300%, the short-term thermal aging (the change rate of the tensile strength and the change rate of the elongation at break) is less than or equal to 15%, the compression permanent deformation is less than or equal to 15%, and the rubber body 2 can bear larger vertical force, lateral force and torsion moment. The rubber body 2 is attached to a convex surface 9 arranged on the outer side of the inner steel sleeve 1, the inner steel sleeve 1 is connected to a bracket 12 through a pin shaft, and friction surfaces 4 are arranged on two end surfaces of the inner steel sleeve 1.

The rubber volume at the left end and the right end of the rubber body 2 is large, and the middle is small, so that when the rubber body 2 bears deformation, the two ends have larger deformation relative to the middle part, and the high-strength bushing can bear larger unbalanced load based on the neutral plane of the bushing.

The two ends of the outer steel sleeve 3 are connected with flanges 5, the flanges 5 are turned over towards the direction close to the end part of the rubber body 2, the outer steel sleeve 3 is in a round tube shape before being formed, the inner surface of the outer steel sleeve is coated with an adhesive 8, the outer surface of the rubber body 2 is firmly coated by a die extrusion method, and then the flanges 5 are processed by an end face extrusion method and are tightly attached to the end part of the rubber body 2.

The outer circular arc size of the rubber body 2 is completely based on the mold processing of the outer steel sleeve 3, so that the flanging 5 can be well attached to the end part of the rubber body 2 during extrusion molding, and the rubber body 2 is enlarged to transfer larger lateral force relative to the outer steel sleeve 3.

The outer steel sleeve 3 is connected with the rubber body 2 through the adhesive 8, so that the outer steel sleeve 3 is firmly connected with the rubber body 2.

The flange 6 is connected with the both ends of interior steel bushing 1, and the inboard laminating of flange 6 is in rubber body 2, and interior steel bushing 1 has better cladding effect to rubber body 2 promptly.

The friction surface 4 is a plurality of concave surfaces, and the friction surface 4 is connected with the inner lining plate 11, so that a larger friction coefficient can be formed between the inner lining plate 11 and the inner steel sleeve 1 of the bushing, and a larger friction force can be transmitted, so that the inner lining plate 11 and the inner steel sleeve 1 are not easy to slip, the risk of loosening a pin shaft of the guide arm 13 due to abrasion between the inner lining plate 11 and the inner steel sleeve 1 is reduced, and the driving safety is improved.

The both ends of rubber body 2 are provided with recess 7, and recess 7 is annular structure, and the recess 7 can make high strength bush when bearing vertical load, side load and moment of torsion, even interior steel bushing 1 and the both ends face of outer steel bushing 3 contact in a certain plane, rubber body 2 reaches the maximum deflection and still is unlikely to extrude from interior steel bushing 1 and outer steel bushing 3 in another planar gap, has guaranteed the integrality of rubber body 2.

The convex surface 9 is waist-drum-shaped, i.e. the convex surface 9 is wider in the middle (width c in fig. 2) and gradually decreases at both ends.

The inner steel sleeve 1 is internally provided with a mounting hole 10, the mounting hole 10 is communicated with a through hole arranged in the support 12, the inner lining plate 11 is fixed in the support 12, the guide arm 13 is connected with the outer steel sleeve 3, the pin shaft penetrates through the through hole and the mounting hole 10 and is locked through a bolt, the installation of the bushing and the guide arm 13 is realized, and the inner lining plate 11, the support 12 and the guide arm 13 all belong to the existing device.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The high-strength bushing of the air suspension guide arm is characterized by comprising an outer steel sleeve (3) and an inner steel sleeve (1) connected in the outer steel sleeve (3), wherein a rubber body (2) is connected between the inner steel sleeve (1) and the outer steel sleeve (3), the rubber body (2) is attached to a convex surface (9) arranged on the outer side of the inner steel sleeve (1), the inner steel sleeve (1) is connected to a support (12) through a pin shaft, and friction surfaces (4) are arranged on two end surfaces of the inner steel sleeve (1);

flanges (6) are connected to two ends of the inner steel sleeve (1), and the inner sides of the flanges (6) are attached to the rubber body (2).

2. The high-strength bushing of an air suspension guide arm according to claim 1, wherein the two ends of the outer steel sleeve (3) are connected with turned edges (5), and the turned edges (5) are turned towards the direction of the end part close to the rubber body (2).

3. A high strength bushing for an air suspension pilot arm according to claim 1, characterized in that the outer steel jacket (3) is connected to the rubber body (2) by means of an adhesive (8).

4. A high strength bushing for an air suspension pilot arm according to claim 1, characterized in that the friction surface (4) is a number of concave surfaces and that the friction surface (4) is connected to the inner lining (11).

5. The high-strength bushing of an air suspension guide arm according to claim 1, wherein grooves (7) are formed in both ends of the rubber body (2), and the grooves (7) are of an annular structure.

6. A high strength bushing for an air suspension pilot arm according to claim 1, characterized in that the raised surface (9) is waist drum shaped.

7. The high-strength bushing of an air suspension guide arm according to claim 1, characterized in that the inner steel bushing (1) is provided with mounting holes (10).