JPH11230239A - Liquid-sealed vibration control mount and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components and the working man-hour of a liquid-sealed vibration control mount and to facilitate its manufacture. SOLUTION: An internal cylinder 1 and an intermediate cylinder 4 are joined to each other with a rubber body 3 into an internal cylinder assembly. The internal cylinder assembly is fitted in an external cylinder 6 with a bracket part 6a for car-body mounting, and both ends of the intermediate cylinder 4 are bent outward or onto the end faces of the external cylinder 6. Between the rubber body 3 and external cylinder 6, plural liquid chambers 7, 7 are defined for mutual communication by way of an orifice passage 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a fluid-filled anti-vibration mount provided on a portion where an engine or a suspension arm of an automobile is mounted on a vehicle body and a method of manufacturing the same.

[0002]

2. Description of the Related Art When an engine or a suspension arm of an automobile is mounted on a vehicle body, an anti-vibration mount having a substantially cylindrical shape is interposed in order to prevent transmission of vibration to the vehicle body. In recent years, this type of anti-vibration mount has a plurality of liquid chambers formed inside a rubber elastic body inserted between an inner cylinder and an outer cylinder to improve the anti-vibration performance. There has been proposed an apparatus in which chambers are communicated by an orifice passage, and vibration transmission is reduced by utilizing the resonance action of a liquid sealed therein.

For example, Japanese Patent Application Laid-Open No. 4-95632 discloses that an inner cylinder assembly is formed by connecting an inner cylinder and an intermediate cylinder with a rubber body, and the inner cylinder assembly is fitted into an outer cylinder, and the inner cylinder assembly is inserted into the outer cylinder. There is disclosed an anti-vibration mount for supporting a suspension arm formed by bending both ends inward and connecting the intermediate cylinder to the intermediate cylinder.

On the other hand, Japanese Patent Application Laid-Open No. Hei 8-291841 discloses that an inner cylinder and an intermediate cylinder are connected by a rubber body to form an inner cylinder assembly, and the inner cylinder assembly is connected to an outer cylinder having a bracket for mounting a vehicle body. There is disclosed an anti-vibration mount for supporting an engine, which is fitted into a cylinder and has both ends of the outer cylinder reduced in diameter to seal a liquid chamber.

[0005]

However, the former anti-vibration mount has to be used by fitting it into another cylindrical member provided with a bracket for mounting the vehicle body, which increases the number of parts and the number of assembly steps. This will increase costs.

On the other hand, in the case of the latter anti-vibration mount, since the outer cylinder directly receives the load mounted on the engine, it is necessary to maintain the strength by increasing the wall thickness. For this reason, it becomes difficult to reduce the diameter of the outer cylinder, and if the diameter is insufficiently reduced, the inner cylinder assembly may come off. Further, when the diameter of the outer cylinder is reduced, the volume of the liquid chamber is reduced and the hydraulic pressure is increased, so that there is a disadvantage that vibration damping characteristics as designed cannot be obtained.

The present invention has been made in view of the above circumstances, and provides a liquid-filled anti-vibration mount that is inexpensive to manufacture, easy to process, and provides vibration damping characteristics as designed, and a method of manufacturing the same. With the goal.

[0008]

A liquid-filled anti-vibration mount for solving the above-mentioned problems comprises an inner cylinder assembly formed by connecting an inner cylinder and an intermediate cylinder with a rubber body, and the inner cylinder assembly is formed by: Fitted into an outer cylinder provided with a bracket for mounting the vehicle body, both ends of the intermediate cylinder are bent outward to engage with the end surface of the outer cylinder, and between the rubber body and the outer cylinder, via an orifice passage. A plurality of liquid chambers communicating with each other are provided.

[0009] At both ends of the intermediate cylinder, seal lips which are integrally formed with the rubber body and which come into close contact with the outer cylinder may be provided.

In a method of manufacturing the liquid-filled anti-vibration mount, one end of an intermediate cylinder constituting the inner cylinder assembly is bent outward in advance, and the inner cylinder assembly is fitted in the outer cylinder in a liquid. The bent portion of the intermediate cylinder is brought into contact with the end surface of the outer cylinder, and then the other end of the intermediate cylinder is bent outward to engage with the end surface of the outer cylinder.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show an anti-vibration mount for supporting a suspension arm. In FIG. 1, reference numeral 1 denotes an inner cylinder into which a suspension arm is inserted, into which a stopper member 2 is press-fitted. The inner cylinder 1 is connected to an intermediate cylinder 4 via a rubber body 3, and the intermediate cylinder 4 has a window 5,
5 are formed as a pair. The inner cylinder assembly thus configured is fitted into the outer cylinder 6. Further, both ends of the intermediate cylinder 4 are bent outward, and the bent portion 4a
Are engaged with the end surface of the outer cylinder 6. The outer cylinder 6 is an extruded product made of metal such as aluminum, and is integrally provided with a bracket portion 6a for mounting on the vehicle body.

A pair of liquid chambers 7, 7 are formed between the rubber body 3 and the outer cylinder 6 so as to face the windows 5, 5 of the intermediate cylinder 4, and these liquid chambers 7, 7 They communicate with each other via an orifice passage 8 formed between the intermediate cylinder 4 and the outer cylinder 6.
At both ends of the intermediate cylinder 4, seal lips 9 integrally formed with the rubber body 3 as shown in FIG.
Is provided. The seal lip 9 may be provided on the bent portion 4a of the intermediate cylinder 4 as shown in FIG.

In the manufacture of this anti-vibration mount, FIG.
As shown in FIG. 3, the inner cylinder assembly 10 in which the bent portion 4a is formed at one end of the intermediate cylinder 4 in advance is immersed in the liquid 11,
Next, as shown in FIG. 6, the outer cylinder 6 is fitted over the inner cylinder assembly 10 and its end face is brought into contact with the bent portion 4a of the intermediate cylinder 4, and the other end of the intermediate cylinder 4 is bent outward to form the outer cylinder. After engaging with the end face of the work 6, the work W may be taken out of the liquid. If the bent portion 4a is formed at one end of the intermediate cylinder 4 in advance, the number of processing steps in the liquid can be reduced, which is advantageous in cost.

The anti-vibration mount of this embodiment does not need to be provided with a bracket for mounting the vehicle body and need to be fitted into another cylindrical member for use. Therefore, the number of parts and the number of assembling steps are reduced, and the cost is reduced. It will be advantageous. Moreover, since the bent portions 4a, 4a may be formed at both ends of the thin intermediate cylinder 4 instead of the thick outer cylinder 6, not only the processing is facilitated, but also the inner cylinder assembly 10 is There is no danger of slipping out. Further, since the pressure of the liquid chambers 7, 7 due to the diameter reduction of the outer cylinder 6 does not increase, the vibration damping characteristics as designed can be exhibited.

FIGS. 7 and 8 show an anti-vibration mount for supporting the engine.

The anti-vibration mount includes an eccentrically arranged inner cylinder 2
0 and the outer cylinder 21, an intermediate cylinder 22 is provided, and a rubber body 23 is interposed between the inner cylinder 20 and the intermediate cylinder 22. And the intermediate cylinder 22 are connected to each other. The intermediate tube 22 is the window 2
4 are formed, of which two windows 24, 2
4, a thin film diaphragm 25, 25 is formed so as to bulge in a bag shape toward the inside, while a rubber body 2 is formed.
A gap 26 is formed between the diaphragm 3 and the diaphragms 25, 25. A stopper 20a is integrally formed at the center of the inner cylinder 20, while a bracket 21a for mounting the vehicle body is integrally formed with the outer cylinder 21.

Both ends of the intermediate cylinder 22 are bent outward, and the bent portion 22a is engaged with the end surface of the outer cylinder 21. A pair of orifice sleeves 27 extending in a substantially semicircular shape along the circumferential direction are fitted on the outer periphery of the rubber body 23. The orifice sleeves 27, 27 are formed with orifice passages 28 that circumscribe the outer peripheral surfaces of the orifice sleeves 27, 27. Have been. This anti-vibration mount is also assembled in the liquid in the same manner as described above.

In this embodiment, the bracket 21a is formed integrally with the outer cylinder 21, but another bracket 31 may be welded to the outer cylinder 21 as shown in FIG.

[0020]

According to the present invention, since it is not necessary to fit and use another cylindrical member provided with a bracket for mounting the vehicle body, the number of parts and the number of assembling steps can be reduced, and the cost can be reduced. It will be advantageous. Moreover, since the bent portions may be formed at both ends of the thin intermediate cylinder instead of the thick outer cylinder, not only the processing is facilitated, but also there is no danger that the inner cylinder assembly will fall out of the outer cylinder. Further, since the hydraulic pressure does not rise due to the diameter reduction of the outer cylinder, the vibration damping characteristics as designed can be exhibited.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an anti-vibration mount for supporting a suspension arm according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view showing a bent portion of the intermediate cylinder of FIG. 2;

FIG. 4 is a diagram showing a modification of FIG. 3;

FIG. 5 is a diagram illustrating a method of manufacturing the anti-vibration mount.

FIG. 6 is a diagram illustrating a method of manufacturing the anti-vibration mount.

FIG. 7 is a sectional view showing an anti-vibration mount for supporting an engine according to the present invention.

FIG. 8 is a sectional view taken along line BB of FIG. 7;

FIG. 9 is a diagram showing a modification of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inner cylinder 3 ... Rubber body 4 ... Intermediate cylinder 6 ... Outer cylinder 6a ... Bracket part 7 ... Liquid chamber 8 ... Orifice passage 10 ... Inner cylinder assembly

Claims (3)

[Claims] An inner cylinder assembly is formed by connecting an inner cylinder and an intermediate cylinder with a rubber body, and the inner cylinder assembly is fitted into an outer cylinder provided with a bracket for attaching a vehicle body, and both ends of the intermediate cylinder are provided. A plurality of liquid chambers communicating with each other via an orifice passage are disposed between the rubber body and the outer cylinder. Anti-vibration mount. 2. The liquid-filled anti-vibration mount according to claim 1, wherein seal lips which are integrally formed with a rubber body and are in close contact with the outer cylinder are provided at both ends of the intermediate cylinder. 3. A method of manufacturing a liquid-filled anti-vibration mount according to claim 1, wherein one end of an intermediate cylinder constituting the inner cylinder assembly is bent outward in advance, and the inner cylinder is mounted on the outer cylinder. Fitting the cylinder assembly in the liquid to bring the bent portion of the intermediate cylinder into contact with the end face of the outer cylinder, and then bending the other end of the intermediate cylinder outward to engage with the end face of the outer cylinder. Characteristic method of manufacturing liquid-filled anti-vibration mount.