Longitudinal arm bushing

Abstract

The utility model relates to a trailing arm bushing which comprises an inner pipe, a rubber layer and an outer ring, and the rubber layer comprises a main spring rubber part made of a first rubber material, a first collision block rubber part made of a second rubber material and a second collision block part made of a second rubber material; the main spring rubber part wraps the periphery of the inner pipe, the first collision block rubber part is arranged at the first axial end of the main spring rubber part, and the second collision block rubber part is arranged at the second axial end of the main spring rubber part. The first collision block rubber part comprises two first collision block bodies, and two first gaps are formed between the two first collision block bodies; the second collision block rubber part comprises two second collision block bodies, and two second gaps are formed between the two second collision block bodies; two axial grooves are formed in the peripheral surface of the main spring rubber part; the outer ring comprises two outer ring single bodies wrapping the periphery of the main spring rubber part, and two outer ring gaps are formed between the two outer ring single bodies. According to the utility model, the cushioning performance and the durability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a comfort trailing arm bushing. Background Art

[0002] Trailing arm bushings used in automobiles primarily provide a degree of cushioning and shock absorption, reducing the impact of road surface irregularities on the vehicle body. They also allow the control arm to move within a certain range to accommodate wheel bouncing and steering angle changes during driving, which in turn affect the vehicle's stability and comfort. Existing trailing arm bushings utilize a conventional inner tube, rubber layer, and outer ring structure, leaving room for improvement in performance. Summary of the Invention

[0003] The purpose of the utility model is to provide a trailing arm bushing with better shock absorbing performance and durability.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A trailing arm bushing, comprising an inner tube, a rubber layer and an outer ring, wherein the rubber layer comprises a main spring rubber portion made of a first rubber material, a first bumper rubber portion made of a second rubber material having a harderness higher than that of the first rubber material, and a second bumper portion made of the second rubber material; the main spring rubber portion is coated on the outer periphery of the inner tube, the first bumper rubber portion is arranged at the axial first end of the main spring rubber portion, and the second bumper rubber portion is arranged at the axial second end of the main spring rubber portion; the first bumper rubber portion comprises two symmetrically arranged first bumper bodies, the first bumper body is connected to the edge of the axial first end face of the main spring rubber portion and extends along the axial direction of the main spring rubber portion, and two first gaps are formed between the two first bumper bodies; the second bumper rubber portion The outer ring comprises two symmetrically arranged second impact blocks, which are connected to the edge of the axial second end face of the main spring rubber part and extend along the axial direction of the main spring rubber part, and the two second impact blocks form two second gaps at a time; the outer peripheral surface of the main spring rubber part is provided with two axial grooves extending along its axial direction, and the axial grooves correspond one to one to the two first gaps and the two second gaps; the outer ring comprises two symmetrically arranged outer ring monomers, which are coated on the outer periphery of the main spring rubber part, and two outer ring gaps are formed between the two outer ring monomers, and the two outer ring gaps are arranged corresponding to the two axial grooves, the first impact block wraps the end of the axial first end of the outer ring, and the second impact block wraps the end of the axial second end of the outer ring.

[0006] A plurality of grooves are distributed on the first collision block.

[0007] The axial groove is a V-shaped groove.

[0008] The first axial end surface and the second axial end surface of the main spring rubber part are both inclined surfaces inclined relative to the axial direction thereof.

[0009] An axial groove is provided on the inner side surface of the outer ring, and a part of the rubber part of the main spring is embedded in the circumferential groove.

[0010] The second axial end of the outer ring is bent outward in its radial direction.

[0011] The outer peripheral surface of the outer ring is provided with concave and convex patterns.

[0012] The inner side surface of the inner tube is provided with a mounting groove extending along the radial direction thereof.

[0013] The slot width of the axial groove is 3-5 mm.

[0014] The material of the inner tube is aluminum, and the material of the outer ring is nylon.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the present invention can improve the shock absorption performance and durability by adopting double rubber materials and setting a double-opening structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 It is a schematic diagram of the appearance of the trailing arm bushing of the present utility model.

[0017] Attachment Figure 2 It is a schematic cross-sectional view of the trailing arm bushing of the present utility model.

[0018] Attachment Figure 3 It is a top view schematic diagram of the trailing arm bushing of the present invention.

[0019] In the above figures: 1. Inner tube; 2. Rubber layer; 3. Outer ring; 4. Main spring rubber part; 5. First collision block rubber part; 6. Second collision block rubber part; 7. First collision block body; 8. Second collision block body; 9. Groove; 10. First gap; 11. Second gap; 12. Outer ring monomer; 13. Outer ring gap. 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, a trailing arm bushing includes an inner tube 1, a rubber layer 2 and an outer ring 3.

[0022] The inner tube 1 is a round tube made of aluminum, and a mounting groove extending radially is provided on the inner side thereof. The inner tube 1 has the advantages of being lightweight and not requiring corrosion.

[0023] The rubber layer 2 comprises a main spring rubber portion 4 and two impactor rubber portions, namely a first impactor rubber portion 5 and a second impactor rubber portion 6. The main spring rubber portion 4 is made of a first rubber material of moderate hardness, while the impactor rubber portions are made of a second rubber material of higher hardness (i.e., the second rubber material has a higher hardness than the first rubber material). The main spring rubber portion 4 wraps around the outer circumference of the inner tube 1. The first impactor rubber portion 5 is located at the first axial end of the main spring rubber portion 4 (corresponding to the upper end in the figure), and the second impactor rubber portion 6 is located at the second axial end of the main spring rubber portion 4 (corresponding to the lower end in the figure). The first impactor rubber portion 5 comprises two first impactor bodies 7, which are symmetrically arranged. The first impactor bodies 7 are connected to the edge of the first axial end surface of the main spring rubber portion 4 and extend axially along the main spring rubber portion 4, forming a nearly annular protrusion on the first axial end surface of the main spring rubber portion 4. Two first gaps 10 are formed between the two first impact blocks 7. These gaps 10 are located at opposite ends of a diameter of the first axial end face of the main spring rubber portion 4 and extend radially. The first impact block 7 may also be provided with a plurality of radially arranged grooves. The second block rubber portion includes two second impact blocks 8, which are symmetrically arranged. The second impact blocks 8 are connected to the edges of the second axial end face of the main spring rubber portion 4 and extend axially along the main spring rubber portion 4, thereby forming a nearly annular protrusion on the second axial end face of the main spring rubber portion 4. Two second gaps 11 are formed between the two second impact blocks 8. These gaps 11 are located at opposite ends of a diameter of the second axial end face of the main spring rubber portion 4 and extend radially. The first gaps 10 and the second gaps 11 correspond radially one to one. The main spring rubber portion 4 is approximately cylindrical, extending from one side close to the inner tube 1 to surround the entire outer circumference of the inner tube 1. Two axial grooves 9 are defined on the outer circumference of the main spring rubber portion 4. These grooves extend along the axial direction of the main spring rubber portion 4. These grooves correspond to the two first gaps 10 and the two second gaps 11, forming two through-holes. The widths of the first gaps 10 and the second gaps 11 are equal to the notch width of the axial grooves 9, typically 3 to 5 mm. The axial grooves 9 are V-shaped. Both the first and second axial end faces of the main spring rubber portion 4 are inclined surfaces with respect to the axial direction, giving the main spring rubber portion 4 a roughly shuttle-shaped shape.

[0024] The outer ring 3 is made of nylon and includes two outer ring units 12, which are symmetrically arranged and cover the outer circumference of the main spring rubber portion 4. Two outer ring gaps 13 are formed between the two outer ring units 12. The two outer ring gaps 13 are arranged corresponding to the two axial grooves 9 and have equal width. Axial grooves 9 are provided on the inner side surface of the outer ring 3, and the main spring rubber portion 4 is partially embedded in the circumferential grooves 9 and fixed. The outer circumferential surface of the outer ring 3 is provided with concave and convex patterns. The first collision block 7 wraps around the end of the first axial end of the outer ring 3, and the second collision block 8 wraps around the end of the second axial end of the outer ring 3. In this embodiment, the second axial end of the outer ring 3 is also bent outward in its radial direction.

[0025] The above trailing arm bushing is a double-compound, double-opening comfort trailing arm bushing, and its advantages are:

[0026] 1. Dual Rubber: The bumper rubber uses a harder rubber to make the limiter respond faster and help extend its service life. The main spring rubber uses a moderately hard rubber to enable the bushing to absorb and disperse the impact from the vehicle body more quickly, providing better shock absorption while ensuring durability to a certain extent.

[0027] 2. Double opening: Double opening provides the bushing with a larger necking amount, increases the rubber space and thus improves durability, thus providing more design space, such as a higher radial-axial stiffness ratio;

[0028] 3. The outer ring 3 is made of nylon, which not only makes the bushing lighter but also saves costs.

[0029] 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. A trailing arm bushing, comprising an inner tube, a rubber layer and an outer ring, characterized in that: The rubber layer includes a main spring rubber part made of a first rubber material, a first bumper rubber part made of a second rubber material having a harderness higher than that of the first rubber material, and a second bumper rubber part made of the second rubber material; the main spring rubber part is coated on the outer periphery of the inner tube, the first bumper rubber part is arranged at the axial first end of the main spring rubber part, and the second bumper rubber part is arranged at the axial second end of the main spring rubber part; the first bumper rubber part includes two symmetrically arranged first bumper bodies, the first bumper body is connected to the edge of the axial first end face of the main spring rubber part and extends along the axial direction of the main spring rubber part, and two first gaps are formed between the two first bumper bodies; the second bumper rubber part includes two symmetrically arranged first bumper bodies The second impact block body is connected to the edge of the axial second end face of the main spring rubber part and extends axially along the main spring rubber part, and the two second impact blocks form two second gaps at a time; the outer peripheral surface of the main spring rubber part is provided with two axial grooves extending along its axial direction, and the axial grooves correspond one to one to the two first gaps and the two second gaps; the outer ring includes two symmetrically arranged outer ring monomers, and the two outer ring monomers are coated on the outer periphery of the main spring rubber part, and two outer ring gaps are formed between the two outer ring monomers, and the two outer ring gaps are arranged corresponding to the two axial grooves, the first impact block body wraps the end of the axial first end of the outer ring, and the second impact block body wraps the end of the axial second end of the outer ring.

2. The trailing arm bushing according to claim 1, characterized in that: A plurality of grooves are distributed on the first collision block.

3. The trailing arm bushing according to claim 1, characterized in that: The axial groove is a V-shaped groove.

4. The trailing arm bushing according to claim 1, characterized in that: The first axial end surface and the second axial end surface of the main spring rubber part are both inclined surfaces inclined relative to the axial direction thereof.

5. The trailing arm bushing according to claim 1, characterized in that: A circumferential groove is provided on the inner side surface of the outer ring, and a part of the rubber part of the main spring is embedded in the circumferential groove.

6. The trailing arm bushing according to claim 1, characterized in that: The second axial end of the outer ring is bent outward in its radial direction.

7. The trailing arm bushing according to claim 1, characterized in that: The outer peripheral surface of the outer ring is provided with concave and convex patterns.

8. The trailing arm bushing according to claim 1, characterized in that: The inner side surface of the inner tube is provided with a mounting groove extending along the radial direction thereof.

9. The trailing arm bushing according to claim 1, characterized in that: The slot width of the axial groove is 3-5 mm.

10. The trailing arm bushing according to claim 1, characterized in that: The material of the inner tube is aluminum, and the material of the outer ring is nylon.

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