Hydraulic bushing

Abstract

The utility model discloses a hydraulic bushing which comprises a main spring and a first outer pipe arranged outside the main spring in a sleeved mode, and the main spring comprises an inner pipe and a closed cavity used for being filled with resistance liquid. The hydraulic bushing further comprises a second outer pipe and a rubber layer, wherein the first outer pipe is sleeved with the second outer pipe, and the rubber layer is arranged between the first outer pipe and the second outer pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, and particularly relates to a hydraulic bushing. BACKGROUND

[0002] With the improvement of people's living standards, more and more attention is paid to the comfort performance of the vehicle during driving. The hydraulic bushing is a main part for adjusting the comfort of the high-grade automobile suspension, and the rear bushing of the double wishbone suspension of MacPherson suspension is a flexible connecting piece between the vehicle body and the wishbone, which has a great influence on the comfort of the whole vehicle. Improving the comfort at low speed and the control stability at high speed has become the main direction of engineers, and the hydraulic bushing can take into account both performances, providing soft buffering at low speed and providing high stiffness to improve the control stability at high speed. However, the durability requirement of the hydraulic bushing restricts the improvement of the two performances.

[0003] Due to the structural limitation of the hydraulic bushing, the structural optimization space of the hydraulic chamber is small, and in order to meet the durability performance, the limiting block is often increased, thereby sacrificing the stroke of the hydraulic bushing under stress. When there is a large impact at low speed, the limiting block for protection durability will produce impact, so that the vehicle will feel obvious vibration, resulting in reduced comfort. SUMMARY

[0004] The utility model aims at overcoming the defects in the prior art, and provides a novel hydraulic bushing, which meets the durability performance of the hydraulic bushing and improves the comfort at low speed.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A hydraulic bushing, comprising a main spring and a first outer pipe sleeved outside the main spring, the main spring comprising an inner pipe and a sealed chamber for injecting resistance liquid, the hydraulic bushing further comprising a second outer pipe sleeved outside the first outer pipe and a rubber layer arranged between the first outer pipe and the second outer pipe.

[0007] In an embodiment, the main spring further comprises a rubber assembly arranged between the first outer pipe and the inner pipe, and the rubber assembly, the inner pipe and the first outer pipe form the sealed chamber.

[0008] In an embodiment, the inner pipe, the first outer pipe and the second outer pipe are coaxially arranged.

[0009] In an embodiment, a buffer space for the deformation and extension of the rubber layer is arranged between the first outer pipe and the second outer pipe.

[0010] In an embodiment, the rubber layer can be deformed in the up-down direction, the buffer space is arranged above the rubber layer, and / or the buffer space is arranged below the rubber layer.

[0011] In an embodiment, the buffer space comprises a first buffer space and a second buffer space, and the first buffer space and the second buffer space are symmetrically arranged above and below the rubber layer.

[0012] In an embodiment, the rubber layer has an inner wall and an outer wall, the inner wall is arranged to form a through hole extending in the up-down direction, and the height of the inner wall in the up-down direction is greater than the height of the outer wall in the up-down direction.

[0013] In an embodiment, the height of the rubber layer in the up-down direction is lower than the first outer tube, and / or the height of the rubber layer in the up-down direction is lower than the second outer tube.

[0014] In an embodiment, the height of the second outer tube in the up-down direction is lower than the first outer tube, and the height of the second outer tube in the up-down direction is higher than the rubber layer.

[0015] In an embodiment, the first outer tube is made of an aluminum alloy, and / or the second outer tube is made of an aluminum alloy.

[0016] Thanks to the use of the above technical solutions, the utility model has the following advantages compared with the prior art:

[0017] 1. By increasing the rubber layer and the second outer tube outside the first outer tube, the total stress travel of the hydraulic bushing is additionally increased, and since the rubber layer and the second outer tube are arranged outside the first outer tube, this arrangement will not affect the limiting travel of the hydraulic bushing in the up-down direction, the main spring is provided with a sealed chamber filled with resistance liquid to provide the durability of the hydraulic bushing, and when used, the rubber layer plays a buffering role under low-speed and heavy load, and the sealed chamber of the main spring plays a steering role when driving at high speed, greatly improving the performance of the hydraulic bushing.

[0018] 2. The hydraulic bushing of the utility model can meet different customer needs during vehicle calibration without changing the main body structure of the main spring, and can meet different stiffness and size requirements, and the additional rubber layer solves the problem that the durability and comfort of the hydraulic bushing cannot be considered. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a sectional view of the hydraulic bushing in an embodiment of the utility model along the up-down direction;

[0020] Reference numerals in the drawings are:

[0021] 1-First outer tube; 2-Second outer tube; 3-Rubber layer; 31-Inner wall; 32-Outer wall; 51-Inner tube; 52-Rubber assembly; 521-Slider; 522-Rubber pad; 523-Rubber block; 53-Nylon-coated body; 54-Sealed chamber; 61-First buffer space; 62-Second buffer space. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, the directions such as "front," "rear," "left," "right," "up," and "down" are explained as follows: Figure 1 As shown in the figure, the left side is "left", the right side is "right", the top side is "up", the bottom side is "down", and the direction perpendicular to the viewpoint is "forward" and "backward". The above definitions of directions are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figure 1 As shown, in some embodiments of the present invention, the hydraulic bushing includes a main spring, a first outer tube 1 sleeved outside the main spring, a second outer tube 2 sleeved outside the first outer tube 1, and a rubber layer 3 disposed between the first outer tube 1 and the second outer tube 2.

[0025] The main spring includes an inner tube 51 and a rubber assembly 52 disposed between the first outer tube 1 and the inner tube 51. The inner tube 51 is generally cylindrical with a through hole in the middle and is made of high-strength aluminum alloy. Specifically, in one embodiment, the main spring also includes a nylon-coated body 53 disposed outside the inner tube 51. The rubber assembly 52 includes a slider 521 with a crescent-shaped cross-section disposed outside the nylon-coated body 53, rubber pads 522 disposed on the upper and lower sides, and a rubber block 523 disposed on the outer side. The cross-section of the rubber block 523 is concave to match the shape of the slider 521. The rubber assembly 52, the inner tube 51, and the first outer tube 1 form a sealed chamber 54 for filling with a resistance fluid, which can be antifreeze. Specifically, in one embodiment, the resistance fluid is filled between the slider 521, the rubber pads 522, and the rubber block 523. In other embodiments, the main spring can also be configured with other specific structures to meet different arrangement requirements and stiffness requirements.

[0026] The first outer tube 1 is generally cylindrical, has a through hole in the middle, and is made of high-strength aluminum alloy to meet the requirements of the pressing-in and pressing-out forces. The second outer tube 2 is generally cylindrical, has a through hole in the middle, and is made of high-strength aluminum alloy to meet the requirements of the pressing-in and pressing-out forces. In an embodiment, the inner tube 51, the first outer tube 1, and the second outer tube 2 are coaxially arranged.

[0027] The rubber layer 3 has an inner wall 31 and an outer wall 32. The inner wall 31 is arranged in contact with the first outer tube 1 and surrounds a through hole extending in the up-down direction. The outer wall 32 is arranged in contact with the second outer tube 2, i.e., the rubber layer 3 is arranged between the first outer tube 1 and the second outer tube 2 and can be extruded and deformed by the first outer tube 1 and the second outer tube 2. In an embodiment, the height of the inner wall 32 in the up-down direction is greater than the height of the outer wall 31 in the up-down direction, i.e., the contact area of the rubber layer 3 with the first outer tube 1 is greater than the contact area of the rubber layer 3 with the second outer tube 2. This structure enables the rubber layer 3 to provide progressive buffering when extruded and deformed. Since the second outer tube 2 and the rubber layer 3 are arranged on the periphery of the first outer tube 1, they do not affect the up-down direction limiting stroke of the first outer tube 1.

[0028] The heights of the rubber layer 3, the second outer tube 2, and the first outer tube 1 in the up-down direction are arranged from low to high, so that the rubber layer 3 does not protrude outside the first outer tube 1 and the second outer tube 2, and a buffering space for the deformation and extension of the rubber layer 3 is left between the first outer tube 1 and the second outer tube 2, so that the rubber layer 3 can better play a buffering role. Specifically, the rubber layer 3 can be deformed and extended in the up-down direction, and the buffering space includes a first buffering space 61 and a second buffering space 62, which are symmetrically arranged in the up-down direction of the rubber layer 3.

[0029] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A hydraulic bushing comprising a main spring and a first outer tube fitted outside the main spring, the main spring comprising an inner tube and a closed chamber for perfusion of a resistance liquid, characterized in that: The hydraulic bushing further comprises a second outer tube sleeved outside the first outer tube and a rubber layer arranged between the first outer tube and the second outer tube.

2. The hydraulic bushing of claim 1, wherein: The main spring further comprises a rubber assembly arranged between the first outer tube and the inner tube, and the rubber assembly, the inner tube and the first outer tube form the sealed chamber.

3. The hydraulic bushing of claim 2, wherein: The inner tube, the first outer tube and the second outer tube are coaxially arranged.

4. The hydraulic bushing of claim 1, wherein: A buffer space for the deformation and extension of the rubber layer is arranged between the first outer tube and the second outer tube.

5. The hydraulic bushing of claim 4, wherein: The rubber layer can deform and extend in the up-down direction, the buffer space is arranged above the rubber layer, and / or the buffer space is arranged below the rubber layer.

6. The hydraulic bushing of claim 5, wherein: The buffer space comprises a first buffer space and a second buffer space, and the first buffer space and the second buffer space are symmetrically arranged above and below the rubber layer.

7. The hydraulic bushing of claim 5, wherein: The rubber layer has an inner wall and an outer wall, the inner wall forms a through hole extending in the up-down direction, and the height of the inner wall in the up-down direction is greater than the height of the outer wall in the up-down direction.

8. The hydraulic bushing of claim 4, wherein: The height of the rubber layer in the up-down direction is lower than the first outer tube, and / or the height of the rubber layer in the up-down direction is lower than the second outer tube.

9. The hydraulic bushing of claim 8, wherein: The height of the second outer tube in the up-down direction is lower than the first outer tube, and the height of the second outer tube in the up-down direction is higher than the rubber layer.

10. The hydraulic bushing of any one of claims 1 to 9, characterized in that: The first outer tube is made of aluminum alloy, and / or the second outer tube is made of aluminum alloy.

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