WO2021238703A1

WO2021238703A1 - Hydraulic bushing and vehicle

Info

Publication number: WO2021238703A1
Application number: PCT/CN2021/094134
Authority: WO
Inventors: 崔有刚; 李锋; 袁亮; 李益
Original assignee: 中国第一汽车股份有限公司
Priority date: 2020-05-25
Filing date: 2021-05-17
Publication date: 2021-12-02
Also published as: CN111795104A; CN111795104B

Abstract

A hydraulic bushing and a vehicle. The hydraulic bushing comprises an inner core (1), a main spring (2), a main spring framework (3), and an outer pipe (4) which are successively sleeved from inside to outside. A first cavity (21) and a second cavity (22) which are communicated with each other are formed between the main spring (2) and the outer pipe (4), the first cavity (21) and the second cavity (22) are provided with damping liquid, and the connecting line of the centers of the first cavity (21) and the second cavity (22) extends in a vertical direction; a first air cavity (11) is formed in the end of the inner core (1) close to the first cavity (21), and/or a second air cavity (12) is formed in the end of the inner core close to the second cavity (22); a first decoupling plate (13) is provided between the first air cavity (11) and the main spring (2), and a second decoupling plate (14) is provided between the second air cavity (12) and the main spring (2). According to the hydraulic bushing, by providing the first air cavity (11) and/or the second air cavity (12), when the hydraulic bushing is subjected to high-frequency small-amplitude vibration, the first air cavity (11) and/or the second air cavity (12) are/is compressed by means of deformation of the first decoupling plate (13) and/or the second decoupling plate (14), and thus a high-frequency dynamic stiffness value is reduced, and a vibration reduction effect of the hydraulic bushing is improved.

Description

Hydraulic bushing and vehicle

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with the application number 202010451476.2 on May 25, 2020, and the entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of vehicle technology, for example, to a hydraulic bushing and a vehicle.

Background technique

Hydraulic bushing refers to that compared with rubber bushings, a part of the liquid is encapsulated in the rubber. The use is the same as the rubber bushing. It is mainly used at the connection of rods, such as the part where the cross arm of the vehicle suspension is connected to the frame. Ring sleeve for cushioning. In the field of vehicle technology, hydraulic bushings are press-fitted in the sub-frame or the rear main reducer for connection between the rear main reducer and the rear sub-frame.

The hydraulic bushing has only a first cavity and a second cavity that communicate with each other, which can effectively produce a damping effect in the case of low frequency and large amplitude; but when the high frequency and small amplitude vibration is too large, the vibration damping effect is poor.

Summary of the invention

The present application provides a hydraulic bushing and a vehicle, which can reduce the dynamic stiffness value during high-frequency and small-amplitude vibration, and improve the vibration damping effect.

The present application provides a hydraulic bushing, which includes an inner core, a main spring, a main spring frame, and an outer tube that are sequentially sleeved from the inside to the outside, and a first cavity communicating with each other is provided between the main spring and the outer tube And a second cavity, the first cavity and the second cavity are provided with a damping fluid, and the central line of the first cavity and the second cavity extends in a vertical direction;

A first air cavity is provided at an end of the inner core close to the first cavity, and/or a second air cavity is provided at an end of the inner core close to the second cavity;

A first decoupling plate is arranged between the first air cavity and the main spring, and a second decoupling plate is arranged between the second air cavity and the main spring.

As an alternative to the hydraulic bushing, the inner core is provided with the first air cavity and the second air cavity, and the central line of the first air cavity and the second air cavity is along the line Extend vertically.

As an alternative to the hydraulic bushing, the main spring and the inner core, the main spring and the first decoupling plate, the main spring and the second decoupling plate, and the Both the main spring and the main spring skeleton are vulcanized and connected.

As an alternative to the hydraulic bushing, a first installation groove is provided on the first air cavity, and the first decoupling plate is placed in the first installation groove; and the second air cavity is provided There is a second installation groove, and the second decoupling plate is placed in the second installation groove.

As an optional solution of the hydraulic bushing, both the first decoupling plate and the first installation groove, and the second decoupling plate and the second installation groove are interference fit.

As an alternative to the hydraulic bushing, the main spring frame is provided with a first through hole corresponding to the first cavity and a second through hole corresponding to the second cavity; A groove is also provided on the peripheral outer wall of the reed frame, a flow channel is provided between the groove and the outer tube, and the first cavity and the second cavity are communicated through the flow channel.

As an alternative to the hydraulic bushing, one end of the inner core in the direction perpendicular to the center line of the first cavity and the second cavity is provided with a first protrusion, and the other end is provided with a second protrusion. rise.

As an alternative to the hydraulic bushing, the main spring skeleton is provided with a third through hole at a position corresponding to the first protrusion, and the main spring skeleton is provided with a fourth through hole at a position corresponding to the second protrusion. Through hole.

As an alternative to the hydraulic bushing, the outer tube includes a mounting section and a connecting section, both axial ends of the outer tube are provided with the mounting section, and the outer diameter of the mounting section is smaller than that of the connecting section. The outer diameter of the segment.

A vehicle is also provided, including the hydraulic bushing described in any one of the above solutions.

Description of the drawings

Fig. 1 is a schematic diagram of a hydraulic bushing provided by an embodiment of the present application;

2 is a schematic diagram of the hydraulic bushing after removing the outer tube according to the embodiment of the present application;

Fig. 3 is a side view of the hydraulic bushing provided by the embodiment of the present application;

Figure 4 is a cross-sectional view at A-A in Figure 3;

Figure 5 is a front view of a hydraulic bushing provided by an embodiment of the present application;

Fig. 6 is a cross-sectional view at B-B in Fig. 5.

In the picture:

1- inner core; 11- first air cavity; 12- second air cavity; 13- first decoupling plate; 14- second decoupling plate; 15- first protrusion; 16- second protrusion;

2-main spring; 21-first cavity; 22-second cavity;

3-Main spring frame; 31-groove; 32-first through hole; 33-third through hole; 34-fourth through hole; 35-second through hole;

4-outer tube; 41-installation section; 42-connection section; 43-sealing rubber.

Detailed ways

The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

As shown in Figures 1 to 6, this embodiment provides a hydraulic bushing for a vehicle. The hydraulic bushing includes an inner core 1, a main spring 2, a main spring frame 3, and an outer core, which are sequentially sleeved from the inside to the outside. The tube 4, the main spring 2 and the outer tube 4 are provided with a first cavity 21 and a second cavity 22 communicating with each other, the first cavity 21 and the second cavity 22 are provided with damping fluid, the first cavity 21 and the second cavity The central line of 22 extends in the vertical direction; the end of the inner core 1 close to the first cavity 21 is provided with a first air cavity 11, and/or the end of the inner core 1 close to the second cavity 22 is provided with a second air cavity 12 ; A first decoupling plate 13 is provided between the first air cavity 11 and the main spring 2, and a second decoupling plate 14 is provided between the second air cavity 12 and the main spring 2.

By arranging the first air cavity 11 at the position of the inner core 1 close to the first cavity 21 and/or the second air cavity 12 at the position of the inner core 1 close to the second cavity 22, the hydraulic bush is subjected to vertical height. During the vibration with low frequency and amplitude, the deformation of the first decoupling plate 13 and/or the second decoupling plate 14 compresses the first air cavity 11 and/or the second air cavity 12, thereby reducing the high-frequency dynamic stiffness value and improving The damping effect of the hydraulic bushing; in addition, when the hydraulic bushing is subjected to vertical low-frequency and large-amplitude vibration, the damping fluid in the first cavity 21 and the second cavity 22 can be in the communicating first cavity 21 and The flow in the second cavity 22 produces a damping effect; in general, the hydraulic bushing has a good damping effect on both the low-frequency large amplitude and the high-frequency small amplitude in the vertical direction.

In an embodiment, the main spring frame 3 is provided with a first through hole 32 corresponding to the first cavity 21 and a second through hole 35 corresponding to the second cavity 22; A groove 31 is also provided, a flow channel is provided between the groove 31 and the outer tube 4, and the first cavity 21 and the second cavity 22 are communicated through the flow channel. When the hydraulic bush is subjected to vertical low-frequency and large-amplitude vibration, the damping fluid can flow between the first cavity 21 and the second cavity 22 through the flow channel to generate a damping movement and achieve a vibration damping effect.

In one embodiment, a sealing rubber 43 is provided on the inner side of the outer tube 4, and the sealing rubber 43 is connected to the outer tube 4 through vulcanization to realize the sealing of the first cavity 21, the second cavity 22 and the flow channel.

In this embodiment, an air cavity is added to the inner core 1 to achieve a vibration damping effect on vertical high-frequency and small-amplitude vibration. In one embodiment, the end of the inner core 1 close to the first cavity 21 is provided with a first air cavity 11, and the end of the inner core 1 close to the second cavity 22 is provided with a second air cavity 12, the first air cavity 11 and the second air cavity 11 The central line of the air cavity 12 extends in the vertical direction. When the hydraulic liner is subjected to vertical high-frequency and small-amplitude vibration, the deformation of the first decoupling plate 13 and the second decoupling plate 14 compresses the first air cavity 11 and the second air cavity 12, thereby reducing the height Frequency dynamic stiffness value improves the damping effect of hydraulic bushing.

In an embodiment, the first air cavity 11 is provided with a first installation groove, and the first decoupling plate 13 is placed in the first installation groove; the second air cavity 12 is provided with a second installation groove, and the second decoupling plate The board 14 is placed in the second installation groove. There is interference fit between the first decoupling plate 13 and the first mounting groove, and between the second decoupling plate 14 and the second mounting groove. The first decoupling plate 13 and the second decoupling plate 14 should not be made of materials with strong rigidity. They can be made of materials that can produce slight deformation, such as nylon, so that they can deform when subjected to high frequency and small amplitude, which will squeeze the first decoupling plate. An air cavity 11 or a second air cavity 12.

Optionally, the bottom surface of the first decoupling plate 13 and the first air cavity 11, the top surface of the second decoupling plate 14 and the second air cavity 12 are all provided with elastic members to avoid the first decoupling plate 13 and the first decoupling plate 13 and the top surface. After the second decoupling plate 14 is deformed by the vibration of high frequency and small amplitude, it collides with the bottom surface of the first air cavity 11 or the top surface of the second air cavity 12, thereby lengthening the first decoupling plate 13 and the second decoupling plate 13 The service life of the coupling plate 14 can also reduce the noise caused by collision.

In this embodiment, the main spring 2 is made of rubber, the main spring 2 and the inner core 1, the main spring 2 and the first decoupling plate 13, the main spring 2 and the second decoupling plate 14, and the main spring 2 and the main spring The spring skeletons 3 are all connected by vulcanization. The assembly process of the hydraulic bushing is as follows: the first decoupling plate 13 and the first mounting groove of the first air cavity 11 are interference-connected, and the second decoupling plate 14 is interference-fitted with the second mounting groove of the second air cavity 12 Connect; then from the inside to the outside, the outer frame of the main spring 2 and the main spring 2 are sleeved on the inner core 1, and the main spring 2 and the inner core 1, the main spring 2 and the first decoupling plate 13 through the vulcanization process , The main spring 2 is connected with the second decoupling plate 14 and the main spring 2 is connected with the main spring frame 3; finally, the vulcanized inner core 1 is pressed into the vulcanized outer tube 4 under the damping fluid to realize the assembly of the hydraulic bushing .

In one embodiment, in order to enhance the strength of the inner core 1, one end of the inner core 1 and the center line of the first cavity 21 and the second cavity 22 is provided with a first protrusion 15 at one end and a second end at the other end. Protruding 16. In order to prevent the hydraulic bush from being vibrated in the extending direction of the central line of the first protrusion 15 and the second protrusion 16, the inner core 1 moves along the extending direction of the central line of the first protrusion 15 and the second protrusion 16 When the first protrusion 15 or the second protrusion 16 collides with the bottom wall of the flow channel, the main spring frame 3 is provided with a third through hole 33 at a position corresponding to the first protrusion 15, and the main spring frame 3 corresponds to the second protrusion. A fourth through hole 34 is provided at the position 16 to reduce the rigid collision between the first protrusion 15 and the second protrusion 16 of the inner core 1 and the main spring frame 3, and extend the use of the inner core 1 and the main spring frame 3 life.

Optionally, the outer tube 4 includes a mounting section 41 and a connecting section 42, both axial ends of the outer tube 4 are provided with mounting sections 41, and the outer diameter of the mounting section 41 is smaller than the outer diameter of the connecting section 42. The installation section 41 adopts a relatively small outer diameter. When the hydraulic bushing is installed as a whole, the installation section 41 can play a guiding role, which is convenient for the installation of the hydraulic bushing.

This embodiment also discloses a vehicle including the hydraulic bushing as described in any of the above solutions.

In the description of this application, the terms "center", "upper", "lower", "third", "fourth", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation , Therefore cannot be understood as a restriction on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

In the description of this application, unless otherwise specified and limited, the terms "installed", "connected", and "connected" shall be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. The meaning of the above terms in this application can be understood according to actual conditions.

Claims

A hydraulic bushing includes an inner core (1), a main spring (2), a main spring frame (3), and an outer tube (4) sheathed in sequence from the inside to the outside, the main spring (2) and the A first cavity (21) and a second cavity (22) communicating with each other are arranged between the outer tube (4), and a damping fluid is arranged in the first cavity (21) and the second cavity (22), The line connecting the centers of the first cavity (21) and the second cavity (22) extends in a vertical direction; wherein,

The inner core (1) includes at least one of the following: an end of the inner core (1) close to the first cavity (21) is provided with a first air cavity (11), and the inner core (1) is close to the first cavity (21). A second air cavity (12) is provided at one end of the second cavity (22);

A first decoupling plate (13) is arranged between the first air cavity (11) and the main spring (2), and a first decoupling plate (13) is arranged between the second air cavity (12) and the main spring (2). There is a second decoupling plate (14).
The hydraulic bushing according to claim 1, wherein the inner core (1) is provided with the first air cavity (11) and the second air cavity (12), and the first air cavity ( 11) A line connecting the center of the second air cavity (12) extends in the vertical direction.
The hydraulic bushing according to claim 2, wherein the main spring (2) and the inner core (1), the main spring (2) and the first decoupling plate (13), the The main spring (2) and the second decoupling plate (14), and the main spring (2) and the main spring frame (3) are all vulcanized connected.
The hydraulic bushing according to claim 1, wherein the first air cavity (11) is provided with a first installation groove, and the first decoupling plate (13) is placed in the first installation groove; The second air cavity (12) is provided with a second installation groove, and the second decoupling plate (14) is placed in the second installation groove.
The hydraulic bushing according to claim 4, wherein between the first decoupling plate (13) and the first mounting groove, and between the second decoupling plate (14) and the second mounting groove There is an interference fit between the grooves.
The hydraulic bushing according to claim 1, wherein the main spring frame (3) is provided with a first through hole (32) corresponding to the first cavity (21) and a second cavity (22) A corresponding second through hole (35); a groove (31) is also provided on the outer wall of the main spring frame (3), and the groove (31) is connected to the outer tube (4). ) Is provided with a flow channel, and the first cavity (21) and the second cavity (22) are communicated through the flow channel.
The hydraulic bushing according to claim 1, wherein one end of the inner core (1) in a direction perpendicular to the central line of the first cavity (21) and the second cavity (22) is provided with a first One protrusion (15) is provided with a second protrusion (16) at the other end.
The hydraulic bushing according to claim 7, wherein the main spring frame (3) is provided with a third through hole (33) at a position corresponding to the first protrusion (15), and the main spring frame (3) ) A fourth through hole (34) is provided at a position corresponding to the second protrusion (16).
The hydraulic bushing according to any one of claims 1-8, wherein the outer tube (4) includes a mounting section (41) and a connecting section (42), and the outer tube (4) has two axial directions Both ends are provided with the mounting section (41), and the outer diameter of the mounting section (41) is smaller than the outer diameter of the connecting section (42).
A vehicle comprising the hydraulic bushing according to any one of claims 1-9.