Lightweight comfortable bushing

Abstract

The utility model relates to a light-weight comfortable lining which is arranged between an upper boundary piece and a lower boundary piece, the light-weight comfortable lining is composed of a metal inner core and a rubber layer, the rubber layer wraps the outer peripheral face and at least part of the end face of the metal inner core, and the rubber layer is embedded between the upper boundary piece and the lower boundary piece. A metal outer pipe is not used, the production cost can be reduced, the hole shrinkage technology does not need to be considered, and therefore the design cost, the production cost, the management cost and the like are reduced, and the purposes of improving the shock absorption performance and improving comfort are achieved by increasing the using amount of rubber.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a lightweight and comfortable bushing. Background Art

[0002] With the rapid development of modern society, the automotive industry is also developing rapidly, placing increasingly higher demands on automobiles. This requires continuous updating and advancement of automotive technology. Rubber bushings, due to their economical efficiency and greatly improved comfort during use, have attracted widespread attention and are now widely used in automobiles.

[0003] Currently, most bushings on the market are composed of a metal outer tube and rubber, which greatly increases the production cost of the bushing. At the same time, due to the existence of the outer tube, the requirements for reducing the diameter are becoming increasingly higher under the requirements of the installation size. Summary of the Invention

[0004] The purpose of the utility model is to provide a lightweight and comfortable bushing which can reduce production costs and does not require consideration of diameter reduction.

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

[0006] A lightweight and comfortable bushing is arranged between an upper boundary piece and a lower boundary piece. The lightweight and comfortable bushing consists of a metal inner core and a rubber layer. The rubber layer is coated on the outer peripheral surface and at least part of the end surface of the metal inner core. The rubber layer is embedded between the upper boundary piece and the lower boundary piece.

[0007] The metal inner core is provided with an axial center hole, an annular plate perpendicular to the axial direction is arranged in the axial center hole, and an axial through hole is provided at the center of the annular plate.

[0008] The axial length of the metal inner tube gradually increases from the inside to the outside along its radial direction.

[0009] The axial length of the rubber layer gradually increases from the inside to the outside along its radial direction.

[0010] An annular protrusion is formed at the edge of the end surface of the rubber layer and is pressed against the upper boundary piece or the lower boundary piece.

[0011] An annular protrusion is formed on the outer peripheral surface of the rubber layer and is embedded in the gap between the upper boundary piece and the lower boundary piece.

[0012] The bottom of the annular projection is provided with a groove which is concave inwardly along the axial direction.

[0013] The upper connecting member includes an upper end cover portion covering the upper end surface of the rubber layer, and an upper side wall portion connected to the edge of the upper end cover portion and surrounding a portion of the outer circumference of the rubber layer; the lower connecting member includes a lower end cover portion covering the lower end surface of the rubber layer, and a lower side wall portion connected to the edge of the lower end cover portion and surrounding a portion of the outer circumference of the rubber layer; a gap is formed between the upper side wall portion and the lower side wall portion for the rubber layer to be embedded.

[0014] The metal inner core is made of aluminum alloy material.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the existing technology: the utility model avoids the use of a metal outer tube, can reduce production costs, and does not need to consider the diameter reduction technology, thereby reducing the cost of design, production and management, and achieves the purpose of improving shock absorption performance and increasing comfort by increasing the amount of rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attachment Figure 1 This is a schematic cross-sectional view of the structure of the lightweight and comfortable bushing of the present invention.

[0017] In the above figures: 1. upper boundary member; 2. lower boundary member; 3. metal inner core; 4. rubber layer; 5. annular plate; 6. annular protrusion; 7. annular protrusion. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0019] Example 1: As shown in the attached Figure 1 As shown, the position where the bushing is installed is arranged relative to an upper boundary member 1 and a lower boundary member 2, and the bushing is installed between the upper boundary member 1 and the lower boundary member 2. The upper boundary member 1 and the lower boundary member 2 are generally made of metal material.

[0020] A lightweight and comfortable bushing is composed of a metal inner core 3 and a rubber layer 4, without the need for a metal outer tube. The rubber layer 4 is also distributed in the position of the original metal outer tube.

[0021] The metal inner core 3 is made of high-strength aluminum alloy, which meets the strength requirements for use and has good corrosion resistance. The metal inner core 3 is provided with an axial center hole, which is cylindrical. An annular plate 5 is provided in the axial center hole, which is perpendicular to the axial direction. The annular plate 5 is located in the axial center of the metal inner core 3, and an axial through hole is provided in the center of the annular plate 5. The axial length of the metal inner tube gradually increases from the inside to the outside along its radial direction, so that the two end faces of the metal inner tube form concave curved surfaces, and the edges of the concave curved surfaces smoothly transition to the outer peripheral surface of the metal inner tube through circular arc surfaces.

[0022] The rubber layer 4 is made of natural rubber, which provides high wear resistance and high rebound mechanical properties. The rubber layer 4 is coated on the outer peripheral surface and at least part of the end surface of the metal inner core 3. At the same time, the rubber layer 4 is also embedded between the upper boundary member 1 and the lower boundary member 2. Specifically, the axial length of the rubber layer 4 gradually increases from the inside to the outside along its radial direction, and the end surface of the rubber layer 4 also forms an inward concave curved surface. The end surface portion of the rubber layer 4 almost completely covers the end surface of the metal inner core 3, and only the edge portion of the axial center hole of the metal inner core 3 is not covered. An annular protrusion 6 is formed at the edge of the end surface of the rubber layer 4, which presses against the upper boundary member 1 or the lower boundary member 2. The cross-section of the annular protrusion 6 can be in an arcuate, parabolic or other shapes. The end face and the outer peripheral surface of the rubber layer 4 are connected by the annular protrusion 6. An annular protrusion 7 is formed on the outer peripheral surface of the rubber layer 4 and is embedded in the gap between the upper boundary member 1 and the lower boundary member 2. The annular projection 7 is roughly in the shape of a rounded triangle, and a groove concave inwardly along the axial direction is provided at the bottom of the annular projection 7 .

[0023] The upper connector includes an upper end cap portion that covers the upper end surface of the rubber layer 4, an upper sidewall portion that connects to the edge of the upper end cap portion and surrounds a portion of the outer circumference of the rubber layer 4. The lower connector includes a lower end cap portion that covers the lower end surface of the rubber layer 4, and a lower sidewall portion that connects to the edge of the lower end cap portion and surrounds a portion of the outer circumference of the rubber layer 4. A gap is formed between the upper and lower sidewall portions for the rubber layer 4 to fit into, and the annular protrusion 7 fits into the gap.

[0024] The above bushing solution avoids the use of a metal outer tube and eliminates the need for diameter reduction technology, significantly reducing production costs while significantly lowering the technical requirements. Because natural rubber has excellent elasticity and is virtually incompressible, the impact of the outer tube is not considered during the design and production process. The required stiffness can be achieved by effectively adjusting the rubber's hardness. Generally, low-hardness rubber can achieve the required radial and torsional stiffness, significantly improving NVH isolation performance and enhancing comfort.

[0025] 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 lightweight and comfortable bushing, arranged between an upper boundary member and a lower boundary member, characterized in that: The lightweight and comfortable bushing consists of a metal inner core and a rubber layer. The rubber layer is coated on the outer peripheral surface and at least part of the end surface of the metal inner core. The rubber layer is embedded between the upper boundary piece and the lower boundary piece.

2. The lightweight and comfortable bushing according to claim 1, characterized in that: The metal inner core is provided with an axial center hole, an annular plate perpendicular to the axial direction is arranged in the axial center hole, and an axial through hole is provided at the center of the annular plate.

3. The lightweight and comfortable bushing according to claim 1, characterized in that: The axial length of the metal inner core gradually increases from the inside to the outside along its radial direction.

4. The lightweight and comfortable bushing according to claim 1, characterized in that: The axial length of the rubber layer gradually increases from the inside to the outside along its radial direction.

5. The lightweight and comfortable bushing according to claim 1, characterized in that: An annular protrusion is formed at the edge of the end surface of the rubber layer and is pressed against the upper boundary piece or the lower boundary piece.

6. The lightweight and comfortable bushing according to claim 1, characterized in that: An annular protrusion is formed on the outer peripheral surface of the rubber layer and is embedded in the gap between the upper boundary piece and the lower boundary piece.

7. The lightweight and comfortable bushing according to claim 6, characterized in that: The bottom of the annular projection is provided with a groove which is concave inwardly along the axial direction.

8. The lightweight and comfortable bushing according to claim 1, characterized in that: The upper boundary member includes an upper end cover portion covering the upper end surface of the rubber layer, and an upper side wall portion connected to the edge of the upper end cover portion and surrounding a portion of the outer circumference of the rubber layer; the lower boundary member includes a lower end cover portion covering the lower end surface of the rubber layer, and a lower side wall portion connected to the edge of the lower end cover portion and surrounding a portion of the outer circumference of the rubber layer; a gap is formed between the upper side wall portion and the lower side wall portion for the rubber layer to be embedded.

9. The lightweight and comfortable bushing according to claim 1, characterized in that: The metal inner core is made of aluminum alloy material.

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