Bidirectional high damping hydraulic subframe bushing and automobile

Abstract

The present invention provides a bidirectional high-damping hydraulic subframe bushing, which belongs to the technical field of hydraulic bushings, and comprises an outer sleeve, an upper elastic body and a lower elastic body. The outer sleeve contains hydraulic oil, and the upper elastic body and the lower elastic body are arranged inside the outer sleeve from top to bottom. A first hydraulic chamber is formed between the upper elastic body and the lower elastic body, and a first recess and a second recess are provided on opposite sides of the lower elastic body. The first recess and the second recess respectively form a second hydraulic chamber and a third hydraulic chamber with the inner wall of the outer sleeve, and a first flow channel for connecting the first hydraulic chamber and the second hydraulic chamber is provided on the upper part of the lower elastic body, and a second flow channel for connecting the second hydraulic chamber and the third hydraulic chamber is provided on the lower part of the lower elastic body. The present invention also provides a car using the above-mentioned bidirectional high-damping hydraulic subframe bushing. The bidirectional high-damping hydraulic subframe bushing provided by the present invention can meet the variable vibration conditions of the vehicle and has a good damping effect.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic bushings, and more specifically, relates to a bidirectional high-damping hydraulic subframe bushing and a car using the bidirectional high-damping hydraulic subframe bushing. Background Art

[0002] The function of the subframe bushing is to connect the vehicle body and the subframe, and to act as a vibration isolation element that restrains and protects the movement trend. Existing bushings are often set according to the stress conditions of the vehicle body and the subframe, and reduce the overall vibration of the vehicle through their own buffering, thereby improving the stability of the entire vehicle.

[0003] When a vehicle is driving, the direction of force will change at any time, and the direction of vehicle vibration is relatively complex. Conventional bushings are pure rubber bushings, which often cannot meet the changing vibrations of the vehicle and have poor damping effects. Summary of the invention

[0004] The purpose of the present invention is to provide a bidirectional high-damping hydraulic subframe bushing, aiming to solve the problem that pure rubber bushings are often difficult to meet the variable vibration of vehicles and have poor damping effect.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a bidirectional high-damping hydraulic subframe bushing, including an outer sleeve, an upper elastic body and a lower elastic body, the outer sleeve is filled with hydraulic oil, the upper elastic body and the lower elastic body are arranged inside the outer sleeve from top to bottom, a first hydraulic chamber is formed between the upper elastic body and the lower elastic body, a first recess and a second recess are provided on opposite sides of the lower elastic body, the first recess and the second recess respectively form a second hydraulic chamber and a third hydraulic chamber with the inner wall of the outer sleeve, a first flow channel for connecting the first hydraulic chamber and the second hydraulic chamber is provided on the upper part of the lower elastic body, and a second flow channel for connecting the second hydraulic chamber and the third hydraulic chamber is provided on the lower part of the lower elastic body.

[0006] As another embodiment of the present application, a first annular recess is formed on the lower end surface of the upper elastic body, and a second annular recess is formed on the upper end surface of the lower elastic body. The first annular recess and the second annular recess are arranged relative to each other to form the first hydraulic chamber, and the first flow channel is connected to the second annular recess.

[0007] As another embodiment of the present application, a retaining ring is fixedly provided at the lower end of the outer sleeve, and the inner diameter of the retaining ring is smaller than the inner diameter of the outer sleeve. A flange is provided at the upper end of the outer sleeve, and a plurality of bent plates bent axially toward the outer sleeve are circumferentially provided on the upper end surface of the flange. The upper elastic body is pressed onto the upper end surface of the flange with the aid of the plurality of bent plates, and the lower elastic body is pressed between the upper elastic body and the retaining ring.

[0008] As another embodiment of the present application, a mounting ring is pre-buried in the circumference of the upper elastic body, the outer diameter of the mounting ring is larger than the outer diameter of the upper elastic body, and the mounting ring is pressed onto the upper end surface of the flange through a plurality of the bent plates.

[0009] As another embodiment of the present application, a first sealing ring is provided on the lower end surface of the lower elastic body, and the first sealing ring is pressed between the lower elastic body and the retaining ring.

[0010] As another embodiment of the present application, an inner sleeve is axially arranged inside the outer sleeve, and the upper elastic body and the lower elastic body are sleeved on the inner sleeve from top to bottom. A pressure cover is also sleeved on the upper part of the inner sleeve, and the pressure cover is pressed onto the upper end of the upper elastic body.

[0011] As another embodiment of the present application, the pressure cover is provided with a connecting sleeve extending downward, the connecting sleeve is arranged on the inner sleeve, a press-fitting groove is opened circumferentially at the bottom end of the connecting sleeve, and the inner ring of the upper elastic body is provided with an annular pressing edge, and the annular pressing edge is pressed tightly in the press-fitting groove.

[0012] As another embodiment of the present application, a conformal skeleton is embedded inside the lower elastic body.

[0013] As another embodiment of the present application, two second sealing rings are provided on the upper part of the lower elastic body, the two second sealing rings are located on the upper and lower sides of the first flow channel, and the two second sealing rings are pressed between the lower elastic body and the outer sleeve to seal the first flow channel; two third sealing rings are provided on the lower part of the lower elastic body, the two third sealing rings are located on the upper and lower sides of the second flow channel, and the two third sealing rings are pressed between the lower elastic body and the outer sleeve to seal the second flow channel.

[0014] The beneficial effect of the bidirectional high damping hydraulic subframe bushing provided by the present invention is that: compared with the prior art, the bidirectional high damping hydraulic subframe bushing of the present invention has an upper elastic body and a lower elastic body which are elastic. When the bushing is subjected to an axial force, the upper elastic body deforms and squeezes the first hydraulic chamber, and the hydraulic oil in the first hydraulic chamber enters the second hydraulic chamber through the first flow channel, thereby realizing an axial high damping characteristic. When the bushing is subjected to a radial force, the lower elastic body deforms and squeezes the second hydraulic chamber or the third hydraulic chamber, and the hydraulic oil in the second hydraulic chamber enters the third hydraulic chamber through the second flow channel, or the hydraulic oil in the third hydraulic chamber enters the second hydraulic chamber through the second flow channel, thereby realizing a radial high damping characteristic. Similarly, when the bushing is subjected to multi-directional forces, the first hydraulic chamber, the second hydraulic chamber and the third hydraulic chamber will deform according to the force conditions, forcing the hydraulic oil to flow in the three hydraulic chambers through the first flow channel or the second flow channel, thereby providing a high damping characteristic under multi-directional forces. The bidirectional high damping hydraulic subframe bushing provided by the present invention can meet the variable vibration conditions of the vehicle, and has a good damping effect.

[0015] The invention also provides an automobile, comprising the bidirectional high-damping hydraulic subframe bushing.

[0016] Compared with the prior art, the automobile provided by the present invention has the same beneficial effects as the bidirectional high-damping hydraulic subframe bushing due to the use of the above-mentioned bidirectional high-damping hydraulic subframe bushing, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional diagram of a bidirectional high-damping hydraulic subframe bushing provided in an embodiment of the present invention;

[0019] Figure 2 A front view of a bidirectional high damping hydraulic subframe bushing provided in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A cross-sectional view;

[0021] Figure 4 for Figure 3 Magnified view at B in the middle;

[0022] Figure 5 A three-dimensional diagram of an upper elastic body provided in an embodiment of the present invention;

[0023] Figure 6 A three-dimensional diagram of a lower elastic body provided in an embodiment of the present invention;

[0024] Figure 7 A three-dimensional diagram of a conformable skeleton provided in an embodiment of the present invention.

[0025] In the figure: 1. outer sleeve; 101. retaining ring; 102. flange; 103. bending plate; 2. upper elastic body; 201. mounting ring; 3. lower elastic body; 301. first sealing ring; 302. second sealing ring; 303. third sealing ring; 4. first hydraulic chamber; 401. first annular recess; 402. second annular recess; 5. second hydraulic chamber; 6. third hydraulic chamber; 7. first flow channel; 8. second flow channel; 9. inner sleeve; 10. pressure cover; 11. connecting sleeve; 12. press-fitting groove; 13. annular pressing edge; 14. conformal skeleton. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See also Figures 1 to 7 Now, the bidirectional high damping hydraulic subframe bushing provided by the present invention is described. The bidirectional high damping hydraulic subframe bushing comprises an outer sleeve 1, an upper elastic body 2 and a lower elastic body 3. The outer sleeve 1 contains hydraulic oil. The upper elastic body 2 and the lower elastic body 3 are arranged inside the outer sleeve 1 from top to bottom. A first hydraulic chamber 4 is formed between the upper elastic body 2 and the lower elastic body 3. A first recess and a second recess are provided on opposite sides of the lower elastic body 3. The first recess and the second recess respectively form a second hydraulic chamber 5 and a third hydraulic chamber 6 with the inner wall of the outer sleeve 1. A first flow channel 7 for connecting the first hydraulic chamber 4 and the second hydraulic chamber 5 is provided on the upper part of the lower elastic body 3. A second flow channel 8 for connecting the second hydraulic chamber 5 and the third hydraulic chamber 6 is provided on the lower part of the lower elastic body 3.

[0028] Compared with the prior art, the bidirectional high damping hydraulic subframe bushing provided by the present invention has the upper elastic body 2 and the lower elastic body 3 having elasticity. When the bushing is subjected to axial force, the upper elastic body 2 is deformed and squeezes the first hydraulic chamber 4, and the hydraulic oil in the first hydraulic chamber 4 enters the second hydraulic chamber 5 through the first flow channel 7, thereby realizing the axial high damping characteristic. When the bushing is subjected to radial force, the lower elastic body 3 is deformed and squeezes the second hydraulic chamber 5 or the third hydraulic chamber 6, and the hydraulic oil in the second hydraulic chamber 5 enters the third hydraulic chamber 6 through the second flow channel 8, or the hydraulic oil in the third hydraulic chamber 6 enters the second hydraulic chamber 5 through the second flow channel 8, thereby realizing the radial high damping characteristic. Similarly, when the bushing is subjected to multi-directional force, the first hydraulic chamber 4, the second hydraulic chamber 5 and the third hydraulic chamber 6 will deform according to the force conditions, forcing the hydraulic oil to flow in the three hydraulic chambers through the first flow channel 7 or the second flow channel 8, thereby providing the high damping characteristics of multi-directional force. The bidirectional high damping hydraulic subframe bushing provided by the present invention can meet the variable vibration conditions of the vehicle, and has a good damping effect.

[0029] The upper elastic body 2 and the lower elastic body 3 are both made of rubber material, and are both cylindrical, with the outer walls being fitted on the inner wall of the outer sleeve 1 .

[0030] The hydraulic oil is squeezed through the first flow channel 7 or the second flow channel 8 into the hydraulic chamber in the force direction, which can damp the upper elastic body or the lower elastic body from continuing to deform, and can effectively achieve high damping characteristics.

[0031] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 3 , a first annular recess 401 is provided on the lower end surface of the upper elastic body 2, and a second annular recess 402 is provided on the upper end surface of the lower elastic body 3. The first annular recess 401 and the second annular recess 402 are arranged opposite to each other to form a first hydraulic chamber 4, and the first flow channel 7 is connected to the second annular recess 402. In this embodiment, the first annular recess 401 is a concave conical cavity provided on the lower end surface of the lower elastic body 3, and the internal space of the first annular recess 401 gradually increases from top to bottom. The second annular recess 402 is a concave conical cavity provided on the upper surface of the upper elastic body 2, and the internal space of the second annular recess 402 gradually increases from bottom to top. Since the first annular recess 401 and the second annular recess 402 have the above-mentioned structure, when the bushing is subjected to axial force, the upper elastic body 2 is more likely to deform first in the middle part, which is convenient for the first hydraulic pressure to achieve rapid deformation, squeeze the hydraulic oil into the second hydraulic cavity, and quickly form axial damping. A through hole is formed on one side of the upper portion of the lower elastic body 3 , which communicates with the first annular recess 401 and the first flow channel 7 , so that the hydraulic oil in the first hydraulic chamber 4 can smoothly enter the second hydraulic chamber 5 or flow back to the first hydraulic chamber 4 again.

[0032] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 2 A retaining ring 101 is fixedly arranged at the lower end of the outer sleeve 1, and the inner diameter of the retaining ring 101 is smaller than the inner diameter of the outer sleeve 1. A flange 102 is arranged at the upper end of the outer sleeve 1, and a plurality of bent plates 103 bent axially toward the outer sleeve 1 are arranged on the circumference of the upper end surface of the flange 102. The upper elastic body 2 is press-fitted on the upper end surface of the flange 102 by means of the plurality of bent plates 103, and the lower elastic body 3 is pressed between the upper elastic body 2 and the retaining ring 101. In this embodiment, the retaining ring 101 is integrally formed with the outer sleeve 1, and the angle between the retaining ring 101 and the outer sleeve 1 is 90°, so that the retaining ring 101 is arranged horizontally and has sufficient structural strength. In addition, the inner diameter of the retaining ring 101 is smaller than the outer diameter of the lower elastic body 3. The flange 102 is integrally formed with the outer sleeve 1, and the outer diameter of the flange 102 is larger than the outer diameter of the outer sleeve 1. The bent plate 103 includes a vertical plate and a horizontal plate. A plurality of vertical plates are integrally formed in the circumference of the flange 102 and are evenly arranged. The horizontal plate is integrally formed at the end of the vertical plate and is bent inward. A press-fitting space is formed between the horizontal plate and the flange 102, and the press-fitting space matches the edge thickness of the upper elastic body 2. When installing the bidirectional high-damping hydraulic subframe bushing provided by the present invention, the lower elastic body 3 is first installed inside the outer sleeve 1 along the axial direction of the outer sleeve 1, and the lower end of the lower elastic body 3 is abutted against the retaining ring 101; then the upper elastic body 2 is installed inside the outer sleeve 1 along the axial direction of the outer sleeve 1, and the upper elastic body 2 is pressed onto the lower elastic body 3; finally, the upper elastic body 2 is pressed onto the upper part of the outer sleeve 1 through a plurality of bent plates 103. At this time, the upper elastic body 2 and the lower elastic body 3 are tightly pressed and stably matched with the outer sleeve 1.

[0033] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 1 , Figure 3 and Figure 5, a mounting ring 201 is pre-buried in the circumference of the upper elastic body 2, the outer diameter of the mounting ring 201 is larger than the outer diameter of the upper elastic body 2, and the mounting ring 201 is pressed on the upper end surface of the flange 102 through a plurality of bending plates 103. In this embodiment, an annular groove is provided in the circumference of the upper elastic body 2, and the annular groove is bent and extended downward on one side close to the axial direction of the outer sleeve 1, and the cross-section of the mounting ring 201 is L-shaped, and its shape is adapted to the annular groove. The mounting ring 201 is made of hard material, and a light alloy can be selected as the structural skeleton of the upper elastic body 2. When the first hydraulic chamber 4 is deformed, due to the existence of the structural skeleton, the upper elastic body will not be greatly deformed, thereby avoiding the gap between the upper elastic body and the outer sleeve 1, which affects the directional flow of the hydraulic oil. The outer circle of the mounting ring 201 is pressed onto the flange 102 through a plurality of bent plates 103. There is a certain gap between the mounting ring 201 and the flange 102. When the mounting ring 201 is pressed by the bent plates 103, the portion of the upper elastic body 2 located in the gap will be pressed at the same time, thereby providing stability and sealing of the upper elastic body and the outer sleeve 1.

[0034] As a specific embodiment of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to 2, the lower end surface of the lower elastic body 3 is provided with a first sealing ring 301, and the first sealing ring 301 is pressed between the lower elastic body 3 and the retaining ring 101. In this embodiment, the first sealing ring 301 can improve the sealing between the lower elastic body 3 and the retaining ring 101 to avoid leakage of hydraulic oil.

[0035] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 2 , an inner sleeve 9 is axially arranged inside the outer sleeve 1, the upper elastic body 2 and the lower elastic body 3 are sleeved on the inner sleeve 9 from top to bottom, and a pressure cap 10 is also sleeved on the upper part of the inner sleeve 9, and the pressure cap 10 is press-fitted on the upper end of the upper elastic body 2. In this embodiment, the outer wall of the inner sleeve 9 is provided with a stepped structure, the outer diameter of the upper part is smaller than the outer diameter of the lower part, the upper elastic body 2 and the lower elastic body 3 are sleeved on the upper smaller outer diameter part and the lower larger outer diameter part of the inner sleeve 9 from top to bottom, the pressure cap 10 is sleeved on the upper smaller outer diameter part of the inner sleeve 9, and is press-fitted on the upper end of the upper elastic body 2, and the pressure cap 10 and the inner sleeve 9 can be fixed by thread or welding, so as to improve the stability of the upper elastic body 2 and avoid the situation that the upper elastic body 2 jumps up after being stressed.

[0036] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 2, a connecting sleeve 11 extending downward is provided on the gland 10, the connecting sleeve 11 is sleeved on the inner sleeve 9, a press-fitting groove 12 is provided in the circumferential direction of the bottom end of the connecting sleeve 11, and an annular pressing edge 13 is provided on the inner ring of the upper elastic body 2, and the annular pressing edge 13 is pressed tightly in the press-fitting groove 12. In this embodiment, the connecting sleeve 11 and the gland 10 are integrally formed, and the connecting sleeve 11 is installed on the outer side of the inner sleeve 9 by threads, which can press the upper elastic body 2 and improve the structural stability of the upper elastic body 2. A press-fitting groove 12 is provided in the circumferential direction of the lower end of the connecting sleeve 11, and the annular pressing edge 13 is integrally formed with the upper elastic body, and is also made of elastic material, and the thickness of the annular pressing plate is greater than the thickness of the press-fitting groove 12. When the upper elastic body is installed in place, the gland 10 is installed on the inner sleeve 9 together with the connecting sleeve 11. When the gland 10 is installed in place, the press-fitting groove 12 presses the annular pressing edge 13, and the annular pressing edge 13 is deformed, thereby ensuring the sealing between the two.

[0037] As a specific implementation of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to Figure 2 and Figure 7 , a conformable skeleton 14 is embedded inside the lower elastic body 3. In this embodiment, the conformable skeleton 14 is embedded inside the lower elastic body 3 when it is formed to form a support skeleton. When the second hydraulic chamber 5 and the third hydraulic chamber 6 are deformed, due to the existence of the support skeleton, the lower elastic body will not be greatly deformed, thereby avoiding a gap between the lower elastic body and the outer sleeve 1, which affects the directional flow of the hydraulic oil.

[0038] As a specific embodiment of the bidirectional high damping hydraulic subframe bushing provided by the present invention, please refer to 2, two second sealing rings 302 are provided on the upper part of the lower elastic body 3, the two second sealing rings 302 are located on the upper and lower sides of the first flow channel 7, and the two second sealing rings 302 are pressed between the lower elastic body 3 and the outer sleeve 1 to seal the first flow channel 7; two third sealing rings 303 are provided on the lower part of the lower elastic body 3, the two third sealing rings 303 are located on the upper and lower sides of the second flow channel 8, and the two third sealing rings 303 are pressed between the lower elastic body 3 and the outer sleeve 1 to seal the second flow channel 8. In this embodiment, the two second sealing rings 302 are pressed between the lower elastic body 3 and the outer sleeve 1, and are located on the upper and lower sides of the first flow channel 7, which can ensure that the first flow channel 7 will not change the flow direction of the hydraulic oil due to deformation when the lower elastic body 3 is deformed. The two third sealing rings 303 are pressed between the lower elastic body 3 and the outer sleeve 1 and are located at the upper and lower sides of the second flow channel 8. When the lower elastic body 3 is deformed, it can ensure that the second flow channel 8 will not change the flow direction of the hydraulic oil due to deformation.

[0039] The present invention also provides an automobile, comprising the above-mentioned bidirectional high-damping hydraulic subframe bushing.

[0040] Compared with the prior art, the automobile provided by the present invention has the same beneficial effects as the bidirectional high-damping hydraulic subframe bushing due to the use of the above-mentioned bidirectional high-damping hydraulic subframe bushing, which will not be described in detail here.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Bidirectional high damping hydraulic subframe bushing, characterized in that: The invention comprises an outer sleeve, an upper elastic body and a lower elastic body, wherein the outer sleeve contains hydraulic oil, the upper elastic body and the lower elastic body are arranged inside the outer sleeve from top to bottom, a first hydraulic chamber is formed between the upper elastic body and the lower elastic body, a first recess and a second recess are provided on opposite sides of the lower elastic body, the first recess and the second recess respectively form a second hydraulic chamber and a third hydraulic chamber with the inner wall of the outer sleeve, a first flow channel for connecting the first hydraulic chamber and the second hydraulic chamber is provided on the upper part of the lower elastic body, and a second flow channel for connecting the second hydraulic chamber and the third hydraulic chamber is provided on the lower part of the lower elastic body; A first annular recess is formed on the lower end surface of the upper elastic body, and a second annular recess is formed on the upper end surface of the lower elastic body. The first annular recess and the second annular recess are arranged opposite to each other to form the first hydraulic chamber, and the first flow channel is connected to the second annular recess. A retaining ring is fixedly provided at the lower end of the outer sleeve, and the inner diameter of the retaining ring is smaller than the inner diameter of the outer sleeve. A flange is provided at the upper end of the outer sleeve, and a plurality of bent plates bent axially toward the outer sleeve are provided on the circumference of the upper end surface of the flange. The upper elastic body is pressed onto the upper end surface of the flange with the aid of the plurality of bent plates, and the lower elastic body is pressed between the upper elastic body and the retaining ring.

2. The bidirectional high damping hydraulic subframe bushing according to claim 1, characterized in that: A mounting ring is pre-buried in the circumference of the upper elastic body. The outer diameter of the mounting ring is larger than the outer diameter of the upper elastic body. The mounting ring is press-fitted on the upper end surface of the flange through a plurality of the bent plates.

3. The bidirectional high damping hydraulic subframe bushing according to claim 1, characterized in that: A first sealing ring is provided on the lower end surface of the lower elastic body, and the first sealing ring is pressed tightly between the lower elastic body and the retaining ring.

4. The bidirectional high damping hydraulic subframe bushing according to claim 1, characterized in that: An inner sleeve is axially arranged inside the outer sleeve, the upper elastic body and the lower elastic body are sleeved on the inner sleeve from top to bottom, and a pressure cover is also sleeved on the upper part of the inner sleeve, and the pressure cover is press-fitted on the upper end of the upper elastic body.

5. The bidirectional high damping hydraulic subframe bushing according to claim 4, characterized in that: The gland is provided with a connecting sleeve extending downward, the connecting sleeve is sleeved on the inner sleeve, a press-fitting groove is opened circumferentially at the bottom end of the connecting sleeve, and an annular pressing edge is provided on the inner ring of the upper elastic body, and the annular pressing edge is pressed tightly into the press-fitting groove.

6. The bidirectional high damping hydraulic subframe bushing according to claim 1, characterized in that: A conformable skeleton is embedded in the lower elastic body.

7. The bidirectional high damping hydraulic subframe bushing according to claim 1, characterized in that: Two second sealing rings are provided on the upper part of the lower elastic body, and the two second sealing rings are located on the upper and lower sides of the first flow channel. The two second sealing rings are pressed between the lower elastic body and the outer sleeve to seal the first flow channel; two third sealing rings are provided on the lower part of the lower elastic body, and the two third sealing rings are located on the upper and lower sides of the second flow channel. The two third sealing rings are pressed between the lower elastic body and the outer sleeve to seal the second flow channel.

8. An automobile, characterized in that It comprises a bidirectional high damping hydraulic subframe bushing as described in any one of claims 1 to 7.

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