CN112081862A

CN112081862A - Hydraulic bushing, vehicle front suspension system and vehicle

Info

Publication number: CN112081862A
Application number: CN201910507746.4A
Authority: CN
Inventors: 刘燕; 李奕宝; 何家兴
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-12-15

Abstract

A hydraulic bushing, comprising: an inner tube; an outer tube; the elastic buffer layer is arranged between the inner pipe and the outer pipe and is integrally vulcanized with the inner pipe; the framework is provided with a flow passage structure for liquid to flow. According to the hydraulic bushing, the vehicle front suspension system comprising the hydraulic bushing and the vehicle comprising the vehicle front suspension system, on the premise that performance requirements are met, the runner structure is integrally designed on the framework, so that runner plate pieces are omitted to reduce cost, meanwhile, hydraulic chambers in the structure are symmetrical, an inner buffering layer with a notch vulcanized on the inner side of the framework is used for limiting and adjusting left and right asymmetrical gaps to achieve preload distribution, the service life of the bushing is prolonged, a common asymmetrical limiting block structure is omitted, and abnormal sound risks are reduced.

Description

Hydraulic bushing, vehicle front suspension system and vehicle

Technical Field

The invention relates to the technical field of vehicle chassis, in particular to a hydraulic bushing, a vehicle front suspension system and a vehicle.

Background

With the increasing living standard of people, the requirement of automobile users on the comfort of automobiles is higher and higher. On one hand, the traditional rubber bushing is limited in damping, so that the vibration of a vehicle body caused by bumpy road surfaces or rapid acceleration or rapid deceleration cannot be quickly attenuated, and the application range is more and more limited; on the other hand, although the hydraulic bushing of present neotype can provide advantages such as big damping under the big amplitude of low frequency condition, more and more car front lower arm adopt hydraulic bushing, nevertheless because of neotype hydraulic bushing structure is complicated, and its weight and cost remain high, in addition it is higher in the subassembly performance requirement in the equipment process, and any process link is not strict just can be accompanied by the abnormal sound problem.

Wherein, the runner plate mainly has following effect in the hydraulic bushing: the length of the flow channel is increased in a limited space through the design of the flow channel, so that the resistance of the liquid flowing from the left liquid chamber to the right liquid chamber is increased, the damping angle is improved, and the vibration impact transmitted by the road surface is further attenuated. Most hydraulic bushing structures in the market all have runner plates, and main spring limiting blocks in various structural forms are designed for solving the abnormal sound problem, so that the number of sub assemblies of one hydraulic bushing is 7-8, and the cost and the weight are large.

Disclosure of Invention

The invention aims to provide a hydraulic bushing, a vehicle front suspension system and a vehicle, and aims to solve the problems of multiple hydraulic bushing components, complex structure, heavy weight and high cost in the prior art.

The technical problem to be solved by the invention is realized by adopting the following technical scheme.

The present invention provides a hydraulic bushing comprising:

the inner tube is a hollow cylinder;

the outer pipe is a hollow cylinder and is sleeved on the outer wall of the inner pipe;

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

the skeleton is a hollow cylindrical structure and is wrapped in the elastic buffer layer, and a flow channel structure for liquid to flow is arranged on the skeleton.

Further, the runner structure is arranged on the outer wall of the framework in a surrounding mode.

Further, the runner structure comprises at least one first runner and/or at least one second runner, the at least one first runner is close to the upper end of the framework, and the at least one second runner is close to the lower end of the framework.

Furthermore, two ends of at least one first flow passage are not communicated, and two ends of at least one second flow passage are not communicated.

Further, the skeleton is provided with fretwork portion along the circumferencial direction, forms the indent structure at fretwork portion department behind the elastic buffer layer parcel skeleton, forms the hydraulic pressure cavity that is used for holding liquid between the inner wall of indent structure and outer tube, and the hydraulic pressure cavity is including being left liquid chamber and the right liquid chamber that the symmetry set up.

Further, a communication channel for communicating the left liquid chamber and the right liquid chamber is further arranged on the outer side face of the framework.

Further, the skeleton separates the elastic buffer layer into outer buffer layer and interior buffer layer, and outer buffer layer parcel is in the outside of skeleton, and interior buffer layer parcel is in the inboard of skeleton.

Furthermore, the two ends of the inner buffer layer are inwards sunken to form cavities, and the cavities comprise a left cavity and a right cavity which are communicated with each other.

Further, the left cavity and the right cavity are arranged asymmetrically.

Further, the inner pipe and the elastic buffer layer are integrally formed in a vulcanization mode.

The invention also provides a vehicle front suspension system, which comprises the hydraulic bushing.

The invention also provides a vehicle comprising the vehicle front suspension system.

According to the hydraulic bushing, the vehicle front suspension system comprising the hydraulic bushing and the vehicle comprising the vehicle front suspension system, on the premise that performance requirements are met, the runner structure is integrally designed on the framework, so that runner plate pieces are omitted to reduce cost, meanwhile, hydraulic chambers in the structure are symmetrical, an inner buffering layer with a notch vulcanized on the inner side of the framework is used for limiting and adjusting left and right asymmetrical gaps to achieve preload distribution, the service life of the bushing is prolonged, a common asymmetrical limiting block structure is omitted, and abnormal sound risks are reduced.

Drawings

Fig. 1 is a schematic perspective view of a hydraulic bushing according to an embodiment of the present invention.

Fig. 2 is a schematic side view of the structure of fig. 1.

Fig. 3 is a schematic sectional perspective structure view of fig. 2.

Fig. 4 is a schematic sectional view along the direction a-a in fig. 2.

Fig. 5 is a schematic structural view of a framework of the hydraulic bushing in the embodiment of the invention.

FIG. 6 is a schematic structural diagram of the frame and the elastic buffer layer after being vulcanized into a whole according to an embodiment of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

Fig. 1 is a schematic perspective view of a hydraulic bushing according to an embodiment of the present invention, fig. 2 is a schematic side view of fig. 1, and fig. 3 is a schematic sectional perspective view of fig. 2. Referring to fig. 1 to 3, an embodiment of the present invention provides a hydraulic bushing, which is applied to a front suspension system of a vehicle, and is used to connect a subframe and a lower swing arm in the suspension system of the vehicle. In this embodiment, the hydraulic bushing includes: an inner tube 20 which 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; the elastic buffer layer 30 is arranged between the inner pipe 20 and the outer pipe 10, the elastic buffer layer 30 and the inner pipe 20 are of an integral structure, and a hydraulic chamber 50 for containing liquid is formed between the elastic buffer layer 30 and the outer pipe 10; the frame 40 is a hollow cylindrical structure and is wrapped in the elastic buffer layer 30, the frame 40 can support the elastic buffer layer 30, and a flow channel structure 41 for liquid to flow is arranged on the frame 40.

Specifically, in this embodiment, the inner tube 20, the outer tube 10 and the frame 40 may be made of aluminum alloy, the elastic buffer layer 30 is made of rubber, and the inner tube 20 and the elastic buffer layer 30 are vulcanized into a whole and then pressed into the outer tube 10 for assembly. In other embodiments, the inner tube 20, the outer tube 10 and the frame 40 may be made of other metals such as stainless steel, and the elastic buffer layer 30 may be made of other elastic polymers such as metal rubber.

Referring to fig. 3, the flow channel structure 41 is disposed around an outer wall of the frame 40, 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 an upper end of the frame 40, and the at least one second flow channel 412 is close to a lower end of the frame 40.

With continued reference to fig. 3, the carcass 40 divides 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 carcass 40, and the inner buffer layer 32 is wrapped around the carcass 40. The two ends of the inner buffer layer 32 are inwards sunken to form cavities 33, and the cavities 33 can play a limiting role, so that the design of limiting blocks can be eliminated.

The cavity 33 specifically includes a left cavity 331 and a right cavity 332 communicating with each other. Wherein, the left cavity 331 and the right cavity 332 are asymmetrically arranged. In order to realize the asymmetric design of the left cavity 331 and the right cavity 332, specifically, the notch 321 (fig. 1 and 4) is disposed on one side of the inner buffer layer 32, so that the gap between the left cavity 331 and the right cavity 332 is not equal.

In this embodiment, the left cavity 331 and the right cavity 332 are designed asymmetrically in consideration of the service life thereof. The vehicle is loaded and has a certain vehicle weight to press on the swing arm, the gap between the left cavity and the right cavity is designed to be unequal initially, and the gap between the left cavity and the right cavity can be equal after the vehicle falls and presses a certain weight, so that the structure of the left cavity and the right cavity is symmetrical, the stress life of the hydraulic bushing with the symmetrical structure is longer, and the hydraulic bushing needs to be designed asymmetrically during initial design for the structural symmetry of the hydraulic bushing when the hydraulic bushing is put into use.

Referring to fig. 1 to 3, in the present embodiment, an aluminum bracket 60 is further included, and after the hydraulic bushing is assembled, the hydraulic bushing is press-fitted into the aluminum bracket 60 in an interference manner.

Fig. 4 is a schematic sectional view along the direction a-a in fig. 2, fig. 5 is a schematic structural view of a frame 40 of a hydraulic bushing according to an embodiment of the present invention, and fig. 6 is a schematic structural view of the frame 40 and the elastic buffer layer 30 after being vulcanized into a whole according to an embodiment of the present invention. Referring to fig. 4 to 6, the frame 40 is provided with a hollow portion 42 along a circumferential direction thereof, the elastic buffer layer 30 wraps the frame 40 to form an inner concave structure 312 at the hollow portion 42, a hydraulic chamber 50 for accommodating liquid is formed between the inner concave structure 312 and an inner wall of the outer tube 10, and 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 a liquid, which may be, for example, ethylene glycol.

Further, referring to fig. 4 and 5, a communication channel 43 for communicating the left liquid chamber 501 and the right liquid chamber 502 is further disposed on the outer side surface of the framework 40. The communication passage 43 laterally communicates the left liquid chamber 501 and the right liquid chamber 502. When the impact is received, one side of the elastic buffer layer 30 is extruded and deformed, and liquid in the hydraulic chamber 50 is extruded and moved from one side to the other side, so that vibration attenuation is realized, and the comfort is improved.

According to the hydraulic bushing, the vehicle front suspension system and the vehicle, on the premise that performance requirements are met, the runner structure 41 is integrally designed on the framework 40, so that runner plate pieces are omitted to reduce cost, meanwhile, the hydraulic chambers 50 in the structure are symmetrical, the inner buffer layer 32 vulcanized on the inner side of the framework 40 and provided with the notches 321 is used for limiting, the left and right asymmetrical gaps are adjusted to achieve preload distribution, the service life of the bushing is prolonged, a common asymmetrical limiting block structure is omitted, and abnormal sound risks are reduced.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A hydraulic bushing, comprising:

an inner tube (20) which is a hollow cylinder;

the outer pipe (10) is a hollow cylinder, and the outer pipe (10) is sleeved on the outer wall of the inner pipe (20);

the elastic buffer layer (30) is arranged between the inner pipe (20) and the outer pipe (10), the elastic buffer layer (30) and the inner pipe (20) are of an integral structure, and a hydraulic chamber (50) for containing liquid is formed between the elastic buffer layer (30) and the outer pipe (10); and

the framework (40) is of a hollow cylindrical structure and is wrapped in the elastic buffer layer (30), and a flow channel structure (41) for liquid to flow is arranged on the framework (40).

2. A 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 as recited in 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), the at least one first flow channel (411) being close to the upper end of the frame (40) and the at least one second flow channel (412) being close to the lower end of the frame (40).

4. A hydraulic bushing according to claim 3, wherein the two ends of the at least one first flow passage (411) are not in communication, and the two ends of the at least one second flow passage (412) are not in communication.

5. The hydraulic bushing according to claim 1, wherein a hollow-out portion (42) is formed in the framework (40) along a circumferential direction, an inner concave structure (312) is formed at the hollow-out portion (42) after the elastic buffer layer (30) wraps the framework (40), a hydraulic chamber (50) for containing liquid is formed between the inner concave structure (312) and the inner wall of the outer tube (10), and 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, wherein a communication passage (43) for communicating the left liquid chamber (501) and the right liquid chamber (502) is further provided on an outer side surface of the bobbin (40).

7. The hydraulic bushing of claim 1, wherein the carcass (40) separates the resilient cushioning layer (30) into an outer cushioning layer (31) and an inner cushioning layer (32), the outer cushioning layer (31) wrapping around the outside of the carcass (40), the inner cushioning layer (32) wrapping around the inside of the carcass (40).

8. The hydraulic bushing of claim 7, wherein both ends of the inner damping layer (32) are recessed inward to form a cavity (33), and the cavity (33) comprises a left cavity (331) and a right cavity (332) which are communicated with each other.

9. The hydraulic bushing of claim 8, wherein the left cavity (331) and the right cavity (332) are asymmetrically arranged.

10. The hydraulic bushing of claim 1, wherein the inner tube (20) is integrally vulcanization molded with the elastomeric damping layer (30).

11. A vehicle front suspension system, characterized by comprising a hydraulic bushing according to any one of claims 1 to 10.

12. A vehicle comprising the vehicle suspension system of claim 11.