Hydraulic bushing, vehicle front suspension system and vehicle

Abstract

A hydraulic bushing comprises: an inner tube; an outer tube; an elastic buffer layer, which is arranged between the inner tube and the outer tube, and the elastic buffer layer and the inner tube are vulcanized into one; and a frame, on which a flow channel structure for liquid flow is arranged. The hydraulic bushing, the vehicle front suspension system including the hydraulic bushing, and the vehicle including the vehicle front suspension system provided by the present invention, on the premise of meeting performance requirements, reduce costs by integrating the flow channel structure into the frame, thereby eliminating the flow channel plate component, and at the same time, the hydraulic chamber in the structure is symmetrical, and the notched inner buffer layer vulcanized on the inner side of the frame is used to limit and adjust the left and right asymmetric gaps to achieve preload distribution, thereby improving the life of the bushing, eliminating the common asymmetric limit block structure, and reducing the risk of abnormal noise.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle chassis, and more specifically to a hydraulic bushing, a vehicle front suspension system and a vehicle. Background Art

[0002] As people's living standards continue to improve, car users have higher and higher requirements for car comfort. On the one hand, traditional rubber bushings often cannot quickly attenuate the body vibration caused by bumpy roads or sudden acceleration or deceleration due to limited damping, and their scope of use is increasingly limited; on the other hand, although the new hydraulic bushings can provide large damping under low frequency and large amplitude conditions, more and more automobile front lower arms use hydraulic bushings, but because the new hydraulic bushings have complex structures, and their weight and cost remain high, in addition, the performance requirements of the sub-components in the assembly process are high, and any process link is not strict, it may be accompanied by abnormal noise problems.

[0003] The main functions of the flow channel plate in the hydraulic bushing are as follows: by designing the flow channel, the flow channel length is increased within a limited space, so that the resistance of the liquid flowing from the left liquid chamber to the right liquid chamber is increased, thereby increasing the damping angle and further attenuating the vibration impact transmitted by the road surface. Most hydraulic bushing structures on the market have flow channel plates, and in order to solve the problem of abnormal noise, various structural forms of main spring limit blocks are also designed, so that a hydraulic bushing has as many as 7-8 sub-components, which are costly and heavy. Summary of the invention

[0004] The object of the present invention is to provide a hydraulic bushing, a vehicle front suspension system and a vehicle, so as to solve the problems in the prior art that the hydraulic bushing has many sub-components, a complex structure, a large weight and a high cost.

[0005] The present invention solves the technical problem by adopting the following technical solutions.

[0006] The present invention provides a hydraulic bushing, comprising:

[0007] The inner tube is a hollow cylinder;

[0008] The outer tube is a hollow cylinder, and is sleeved on the outer wall of the inner tube;

[0009] An elastic buffer layer is arranged between the inner tube and the outer tube, the elastic buffer layer and the inner tube are vulcanized into an integral structure, and a hydraulic chamber for containing liquid is formed between the elastic buffer layer and the outer tube;

[0010] The skeleton is a hollow cylindrical structure, which is wrapped in an elastic buffer layer, and a flow channel structure for liquid flow is arranged on the skeleton.

[0011] Furthermore, the flow channel structure is arranged around the outer wall of the frame.

[0012] Furthermore, the flow channel structure includes at least one first flow channel and / or at least one second flow channel, the at least one first flow channel is close to the upper end of the skeleton, and the at least one second flow channel is close to the lower end of the skeleton.

[0013] Further, two ends of at least one first flow channel are not connected, and two ends of at least one second flow channel are not connected.

[0014] Furthermore, the skeleton is provided with a hollow portion along the circumferential direction, and an inner concave structure is formed at the hollow portion after the elastic buffer layer wraps the skeleton, and a hydraulic chamber for containing liquid is formed between the inner concave structure and the inner wall of the outer tube, and the hydraulic chamber includes a left liquid chamber and a right liquid chamber which are symmetrically arranged.

[0015] Furthermore, a communication channel for connecting the left liquid chamber and the right liquid chamber is also provided on the outer side surface of the frame.

[0016] Furthermore, the skeleton separates the elastic buffer layer into an outer buffer layer and an inner buffer layer, the outer buffer layer is wrapped on the outer side of the skeleton, and the inner buffer layer is wrapped on the inner side of the skeleton.

[0017] Furthermore, two ends of the inner buffer layer are inwardly recessed to form a cavity, and the cavity includes a left cavity and a right cavity that are interconnected.

[0018] Furthermore, the left cavity and the right cavity are arranged asymmetrically.

[0019] Furthermore, the inner tube and the elastic buffer layer are integrally vulcanized.

[0020] The present invention also provides a vehicle front suspension system, comprising the hydraulic bushing as described above.

[0021] The present invention also provides a vehicle, comprising the vehicle front suspension system as described above.

[0022] The hydraulic bushing, the vehicle front suspension system including the hydraulic bushing, and the vehicle including the vehicle front suspension system provided by the present invention, while meeting performance requirements, reduce costs by integrating the flow channel structure into the frame, thereby eliminating the flow channel plate component. At the same time, the hydraulic chamber in the structure is symmetrical, and the notched inner buffer layer vulcanized on the inner side of the frame is used to limit and adjust the left and right asymmetric gaps to achieve preload distribution, thereby increasing the life of the bushing, eliminating the common asymmetric limit block structure, and reducing the risk of abnormal noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the hydraulic bushing in an embodiment of the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the side view structure in.

[0025] Figure 3 for Figure 2 Schematic diagram of the cross-sectional perspective structure in.

[0026] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0027] Figure 5 It is a schematic structural diagram of the framework of the hydraulic bushing in an embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the structure after the skeleton and the elastic buffer layer are vulcanized into one in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to further explain the technical methods and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of the hydraulic bushing in an embodiment of the present invention, Figure 2 for Figure 1 The side view of the structure is shown in Fig. Figure 3 for Figure 2 Please refer to the cross-sectional perspective diagram in Figures 1 to 3 , an embodiment of the present invention provides a hydraulic bushing, which is applied to a front suspension system of a vehicle. In the vehicle suspension system, the hydraulic bushing is used to connect the subframe and the lower arm. In this embodiment, the hydraulic bushing includes: an inner tube 20, which is a hollow cylinder; an outer tube 10, which is a hollow cylinder, and the outer tube 10 is sleeved on the outer wall of the inner tube 20; an elastic buffer layer 30, which is arranged between the inner tube 20 and the outer tube 10, and the elastic buffer layer 30 and the inner tube 20 are an integral structure, and a hydraulic chamber 50 for accommodating liquid is formed between the elastic buffer layer 30 and the outer tube 10; a skeleton 40, which is a hollow cylindrical structure, is wrapped in the elastic buffer layer 30, and the skeleton 40 can play a supporting role to support the elastic buffer layer 30, and a flow channel structure 41 for liquid flow is provided on the skeleton 40.

[0031] Specifically, in this embodiment, the materials of the inner tube 20, the outer tube 10 and the skeleton 40 can all be aluminum alloy, the material of the elastic buffer layer 30 is rubber, and the inner tube 20 and the elastic buffer layer 30 are vulcanized into one and then pressed into the outer tube 10 for assembly. In other embodiments, the materials of the inner tube 20, the outer tube 10 and the skeleton 40 can be other metals such as stainless steel, and the material of the elastic buffer layer 30 can be other elastic polymers such as metal rubber.

[0032] Please combine Figure 3The flow channel structure 41 is arranged around the outer wall of the skeleton 40, and the flow channel structure 41 includes at least one first flow channel 411 and / or at least one second flow channel 412, the at least one first flow channel 411 is close to the upper end of the skeleton 40, and the at least one second flow channel 412 is close to the lower end of the skeleton 40.

[0033] Please continue to refer to Figure 3 The skeleton 40 separates the elastic buffer layer 30 into an outer buffer layer 31 and an inner buffer layer 32. The outer buffer layer 31 is wrapped around the outer side of the skeleton 40, and the inner buffer layer 32 is wrapped around the inner side of the skeleton 40. Both ends of the inner buffer layer 32 are recessed inward to form a cavity 33, which can play a limiting role, so that the design of the limit block can be eliminated.

[0034] The cavity 33 specifically includes a left cavity 331 and a right cavity 332 which are interconnected. The left cavity 331 and the right cavity 332 are asymmetrically arranged. To achieve the asymmetrical design of the left cavity 331 and the right cavity 332, a notch 321 ( Figure 1 and Figure 4 ), so that the gaps between the left cavity 331 and the right cavity 332 are not equal.

[0035] In this embodiment, the left cavity 331 and the right cavity 332 are designed asymmetrically in consideration of their service life. After the vehicle is installed, a certain weight is placed on the swing arm. The initial design makes the gaps between the left and right cavities unequal. Only after the vehicle lands and places a certain weight on the ground can the gaps between the left and right cavities be equal, so that the structures of the left and right cavities are symmetrical. The hydraulic bushing with a symmetrical structure has a longer stress life. In order to make the hydraulic bushing symmetrical in structure when it is put into use, an asymmetrical design is required during the initial design.

[0036] Please combine Figures 1 to 3 In this embodiment, an aluminum bracket 60 is also included. After the hydraulic bushing is assembled, the hydraulic bushing is press-fitted into the aluminum bracket 60.

[0037] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction. Figure 5 Schematic diagram of the structure of the hydraulic bushing skeleton 40 in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the skeleton 40 and the elastic buffer layer 30 after vulcanization into one body in the embodiment of the present invention. Figures 4 to 6The skeleton 40 is provided with a hollow portion 42 along its circumferential direction. After the elastic buffer layer 30 wraps the skeleton 40, a concave structure 312 is formed in the hollow portion 42. A hydraulic chamber 50 for containing liquid is formed between the concave structure 312 and the inner wall of the outer tube 10. The hydraulic chamber 50 includes a left liquid chamber 501 and a right liquid chamber 502 which are symmetrically arranged. The hydraulic chamber 50 is filled with liquid, which may be ethylene glycol, for example.

[0038] Furthermore, please combine Figure 4 and Figure 5 A connecting channel 43 for connecting the left liquid chamber 501 and the right liquid chamber 502 is also provided on the outer side of the frame 40. The connecting channel 43 connects the left liquid chamber 501 and the right liquid chamber 502 transversely. When impacted, one side of the elastic buffer layer 30 is squeezed and deformed, and the liquid in the hydraulic chamber 50 is squeezed and moved from one side to the other side, thereby achieving vibration attenuation and improving comfort.

[0039] The present invention also provides a vehicle front suspension system, comprising the hydraulic bushing as described above.

[0040] The present invention also provides a vehicle, comprising the vehicle front suspension system as described above.

[0041] The hydraulic bushing, vehicle front suspension system and vehicle provided by the present invention, while meeting performance requirements, reduce costs by integrating the flow channel structure 41 on the skeleton 40, thereby eliminating the flow channel plate component. At the same time, the hydraulic chamber 50 in the structure is symmetrical, and the inner buffer layer 32 with a notch 321 vulcanized on the inner side of the skeleton 40 is used to limit and adjust the left and right asymmetric gaps to achieve preload distribution, thereby improving the life of the bushing, eliminating the common asymmetric limit block structure, and reducing the risk of abnormal noise.

[0042] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0043] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0044] 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, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic bushing, characterized in that: include: The inner tube (20) is a hollow cylinder; The outer tube (10) is a hollow cylinder, and the outer tube (10) is sleeved on the outer wall of the inner tube (20); an elastic buffer layer (30), the elastic buffer layer (30) being made of rubber and being arranged between the inner tube (20) and the outer tube (10); the elastic buffer layer (30) and the inner tube (20) being an integral structure; and a hydraulic chamber (50) for containing liquid is formed between the elastic buffer layer (30) and the outer tube (10); and The skeleton (40) is a hollow cylindrical structure, which is wrapped in the elastic buffer layer (30); a flow channel structure (41) for liquid flow is provided on the skeleton (40); The skeleton (40) separates the elastic buffer layer (30) into an outer buffer layer (31) and an inner buffer layer (32); the outer buffer layer (31) is wrapped around the outer side of the skeleton (40), and the inner buffer layer (32) is wrapped around the inner side of the skeleton (40); both ends of the inner buffer layer (32) are recessed inward to form a cavity (33); the cavity (33) comprises a left cavity (331) and a right cavity (332) that are interconnected.

2. The hydraulic bushing according to claim 1, characterized in that: The flow channel structure (41) is arranged around the outer wall of the frame (40).

3. The hydraulic bushing according to claim 2, characterized in that: The flow channel structure (41) comprises at least one first flow channel (411) and / or at least one second flow channel (412), wherein the at least one first flow channel (411) is close to the upper end of the skeleton (40), and the at least one second flow channel (412) is close to the lower end of the skeleton (40).

4. The hydraulic bushing according to claim 3, characterized in that: The two ends of the at least one first flow channel (411) are not connected, and the two ends of the at least one second flow channel (412) are not connected.

5. The hydraulic bushing according to claim 1, characterized in that: The skeleton (40) is provided with a hollow portion (42) along the circumferential direction; after the elastic buffer layer (30) wraps the skeleton (40), a concave structure (312) is formed at the hollow portion (42); a hydraulic chamber (50) for containing liquid is formed between the concave structure (312) and the inner wall of the outer tube (10); the hydraulic chamber (50) comprises a left liquid chamber (501) and a right liquid chamber (502) which are symmetrically arranged.

6. The hydraulic bushing according to claim 5, characterized in that: A communication channel (43) for connecting the left liquid chamber (501) and the right liquid chamber (502) is also provided on the outer side surface of the skeleton (40).

7. The hydraulic bushing according to claim 1, characterized in that: The left cavity (331) and the right cavity (332) are arranged asymmetrically.

8. The hydraulic bushing according to claim 1, characterized in that: The inner tube (20) and the elastic buffer layer (30) are integrally vulcanized.

9. A vehicle front suspension system, characterized in that: Comprising the hydraulic bushing according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the vehicle front suspension system as claimed in claim 9.

Images