JPH1163085A - Liquid sealing type vibration proof mount and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability of a rubber elastic body without causing an increase in manufacturing cost. SOLUTION: An inner cylinder assembly 33 is comprised of an inner cylinder 21, an auxiliary outer cylinder 35, and a thick rubber elastic body 23 linking them. An outer cylinder assembly 34 is comprised of an outer cylinder 22, auxiliary inner cylinders 38 and 39, and thin rubber elastic bodies 24 and 26 linking them. The thin rubber elastic bodies 24 and 26 of the outer cylinder assembly 34 are inclined in advance in a direction in which the inner cylinder invades during assembling of the inner and outer cylinder assemblies 33 and 34, and formed. When the inner and outer rubber assemblies 33 and 34 are assembled, the thin rubber elastic bodies 26 and 24 are compressed and deformed so as to orient in a substantially vertical direction to the outer cylinder 22, and the inner cylinder 21 is pressed in the auxiliary inner cylinders 39 and 38, and is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled anti-vibration mount used as a suspension member mount for an automobile and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a liquid-filled vibration-proof mount of this type, a mount shown in Japanese Patent Publication No. 6-50135 has been proposed.

This anti-vibration mount is, as shown in FIG.
The inner cylinder 1 and the outer cylinder 2 are arranged concentrically, and the ends of the inner cylinder 1 and the outer cylinder 2 are closed by rubber elastic bodies 3 and 4,
The interior surrounded by the inner and outer cylinders 1 and 2 and the rubber elastic bodies 3 and 4 is a liquid chamber filled with a liquid having a predetermined viscosity. The interior of the liquid chamber is separated into two upper and lower chambers by an annular orifice member 5 and a rubber elastic body 6 so that the upper and lower two chambers communicate with each other by a predetermined length orifice passage 7 formed in the orifice member 5. It has become.

In this anti-vibration mount, the inner and outer cylinders 1,
When an axial vibration is input between the two, the orifice passage 7
And the upper and lower rubber elastic bodies 3 and 4 reduce the input vibration. When the radial vibration is input, the rubber elastic bodies 3, 4 and 6 reduce the input vibration by their elasticity. Reduce.

The anti-vibration mount includes an inner cylinder assembly 8
And the outer cylinder assembly 9 are pre-assembled separately, and these assemblies 8 and 9 are assembled together in a final assembling step.

More specifically, the inner cylinder assembly 8 includes an inner cylinder 1 and an auxiliary outer cylinder 10 disposed on the outer periphery at one end thereof connected by a thick rubber elastic body 3 and an orifice member 5.
And the auxiliary inner cylinder 1 vulcanized and bonded to the thin rubber elastic body 6
1 is press-fitted and fixed to the inner cylinder 1, and the outer cylinder assembly 9 includes an outer cylinder 2 and an auxiliary inner cylinder 12 disposed on the inner circumference at one end side of the outer cylinder 2 by a thin rubber elastic body 4. It has a linked configuration. When assembling the inner cylinder assembly 8 and the outer cylinder assembly 9, the inner cylinder 1 of the inner cylinder assembly 8 is pressed into the auxiliary inner cylinder 12 of the outer cylinder assembly 9, and the inner cylinder assembly 8 is pressed. The auxiliary outer cylinder 10 and the orifice member 5 are press-fitted into the outer cylinder 2 of the outer cylinder assembly 9, and the auxiliary outer cylinder 10 is finally caulked and fixed to the outer cylinder 2.

[0007]

However, in the case of the above-mentioned conventional liquid filled type vibration damping mount, the effective length in the radial direction of the thin rubber elastic bodies 4 and 6 (substantially elastic deformation) is due to design restrictions and the like. If the length of the rubber elastic bodies 4 and 6 cannot be sufficiently secured, the shear strain of the rubber elastic bodies 4 and 6 with respect to the input vibration in the axial direction increases, and the rubber elastic bodies 4 and 6 are easily deteriorated with use over time. There is a problem that.

As means for coping with this, after assembling the inner cylinder assembly 8 and the outer cylinder assembly 9, a portion of the outer cylinder 2 located on the outer peripheral side of the rubber elastic bodies 4, 6 is formed. Preliminary compression is applied to the rubber elastic bodies 4 and 6 by drawing. However, when the pre-compression is applied to the rubber elastic bodies 4 and 6 in this manner, the rubber elastic bodies 4 and 6 have a margin for deformation in the shear direction, and the durability is surely improved. However, since the drawing process is separately performed after the assembly of the inner cylinder assembly 8 and the outer cylinder assembly 9, another problem such as an increase in manufacturing cost is caused.

Accordingly, an object of the present invention is to provide a liquid-filled anti-vibration mount and a method of manufacturing the same, which can improve the durability of the rubber elastic body without increasing the manufacturing cost.

[0010]

Means for Solving the Problems As means for solving the above-mentioned problems, according to the invention of claim 1, an inner cylinder and an auxiliary outer cylinder arranged on the outer periphery thereof are connected by a thick rubber elastic body. An inner cylinder assembly, and an outer cylinder assembly in which an outer cylinder and an auxiliary inner cylinder disposed on the inner periphery thereof are connected by a thin rubber elastic body thinner than the thick rubber elastic body; An inner cylinder and an auxiliary outer cylinder of the cylinder assembly are fitted and fixed to the auxiliary inner cylinder and the outer cylinder of the outer cylinder assembly, respectively, and a liquid-filled anti-vibration mount including a liquid chamber formed between the inner and outer cylinders. In the above, the thin rubber elastic body is formed such that its inner peripheral edge side is inclined in a direction in which the inner cylinder enters when the inner cylinder assembly and the outer cylinder assembly are assembled. The inner cylinder and the auxiliary inner cylinder are fitted so that they are compressed and deformed in a direction substantially perpendicular to the outer cylinder. It was to be constant. Since the pre-compression is applied to the thin rubber elastic body, there is a margin for the deformation of the thin rubber elastic body in the shear direction, and the durability of the thin rubber elastic body is improved accordingly. Also, since the pre-compression is applied to the thin rubber elastic body at the same time when the inner cylinder and the auxiliary inner cylinder are fitted and fixed, the number of processing steps does not increase.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer cylinder assembly includes an outer cylinder and a first cylinder disposed on an inner periphery thereof.
An auxiliary inner cylinder and a second auxiliary inner cylinder, a first thin rubber elastic body that connects the outer cylinder and the first auxiliary inner cylinder to form one end wall of the liquid chamber, and the outer cylinder and the second auxiliary A second thin rubber elastic body that connects the inner cylinder and separates the liquid chamber into two chambers; and an orifice member interposed between the outer cylinder and the second thin rubber elastic body to communicate the two chambers. , Is provided. The first thin rubber elastic body and the second thin rubber elastic body are pre-compressed, and the durability of both is improved. In particular, it is difficult for the second thin elastic body to secure a sufficient radial length because of the arrangement of the orifice member on the outer peripheral side. Since the compression is applied, the durability is surely improved.

According to a third aspect of the present invention, there is provided an inner cylinder assembly in which an inner cylinder and an auxiliary outer cylinder arranged on the outer periphery thereof are connected by a thick rubber elastic body, and an outer cylinder and an auxiliary cylinder arranged on the inner periphery thereof. An outer cylinder assembly connected to the inner cylinder by a thin rubber elastic body thinner than the thick rubber elastic body, wherein the inner cylinder and the auxiliary outer cylinder of the inner cylinder assembly are the outer cylinder assembly. In the method for manufacturing a liquid-sealed anti-vibration mount in which a liquid chamber is formed between the inner and outer cylinders by being fitted and fixed respectively to the auxiliary inner cylinder and the outer cylinder, the thin rubber elastic body has an inner peripheral edge side. When the inner cylinder assembly and the outer cylinder assembly are assembled, they are formed in advance so as to be inclined in the direction in which the inner cylinder enters, and when the inner cylinder assembly and the outer cylinder assembly are assembled, the thin wall is formed. While compressing and deforming the rubber elastic body so as to face a direction substantially perpendicular to the outer cylinder, the inner cylinder and the auxiliary inner cylinder are It was as if fixed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG.

FIGS. 2 and 3 show a liquid-filled anti-vibration mount according to the present invention which has been assembled.
FIG. 1 illustrates an example in which this vibration-proof mount is used for a connecting portion between a vehicle body 20 and a suspension member. The schematic configuration of the anti-vibration mount will be described based on these drawings.
The anti-vibration mount includes an inner cylinder 21 and an outer cylinder 22 arranged concentrically, a thick rubber elastic body 23 closing one end of the inner and outer cylinders 21 and 22, and the other of the inner and outer cylinders 21 and 22. A first thin rubber elastic body 24 for closing the space between the end portions;
22 and a second thin rubber elastic body 26 which separates a liquid chamber 25 surrounded by the two rubber elastic bodies 23 and 24 into two upper and lower chambers 25a and 25b, and the second thin rubber elastic body 26 and the inner cylinder 2
And an annular orifice member 27 disposed between the two upper and lower chambers 25a and 25b through an orifice passage 28 formed in the orifice member 27. The inner cylinder 21 is connected to a rod 29 projecting from the vehicle body 20 via a stopper plate 30 and a nut 31, and the outer cylinder 22 is connected to a suspension member (not shown) via a bracket 32. It has become. The basic anti-vibration function of this anti-vibration mount is the same as that of the conventional anti-vibration mount shown in FIG. 6, and the description of the function is omitted here.

The anti-vibration mount is, as shown in FIG. 1, preliminarily assembled into an inner cylinder assembly 33 and an outer cylinder assembly 34, and these assemblies 33, 34 are connected to each other by a liquid chamber. 2
5 to be finally assembled in a liquid tank.

The inner cylinder assembly 33 includes an inner cylinder 21 and an auxiliary outer cylinder 35 disposed on the outer periphery of one end of the inner cylinder 21.
3, and a fixing flange 36 extends from an end of the auxiliary outer cylinder 35. A substantially annular elastic projection 37 is formed integrally with the rubber elastic body 23 at an inner peripheral edge of the fixing flange 36. The elastic projection 37 is for preventing an excessive displacement in the axial direction between the inner and outer cylinders 21 and 22. In FIG.
Is displaced upward by more than a set amount with respect to the inner cylinder 21, it comes into contact with the lower surface on the vehicle body 20 side and elastically restricts the excessive displacement.

On the other hand, the outer cylinder assembly 34 includes an outer cylinder 22, a first auxiliary inner cylinder 38 disposed on the inner periphery at one end thereof, and a second auxiliary cylinder 38 connecting the outer cylinder 22 and the first auxiliary inner cylinder 38. (1) a thin rubber elastic body 24, an annular orifice member 27 fitted and fixed at a substantially central portion in the axial direction within the outer cylinder 22, and a second thin rubber elastic body 26 joined to the inner peripheral surface of the orifice member 27;
And a second auxiliary inner cylinder 39 joined to the inner peripheral portion of the second thin rubber elastic body 26. As shown in FIG. 4, the outer cylinder assembly 34 includes an outer cylinder 22, a first auxiliary inner cylinder 38, and a first thin rubber elastic body 24, an orifice member 27, and a second auxiliary inner cylinder 39. The three members of the second thin rubber elastic body 26 are integrally formed by vulcanization molding in advance, and in this state, the orifice member 27 is press-fitted into the outer cylinder 22 so that all parts are integrally assembled.
When the orifice member 27 is pressed into the outer cylinder 22, the first and second auxiliary inner cylinders 38 and 39 abut each other.

Here, the first and second thin rubber elastic bodies 24,
26 is formed such that its inner peripheral edge is inclined at a predetermined angle in the direction in which the inner cylinder 21 enters (upward in FIG. 4) when the inner cylinder assembly 33 and the outer cylinder assembly 34 are assembled. Have been. Therefore, in this state, the extension length of the first thin rubber elastic body 24 is longer than the actual distance between the outer cylinder 22 and the first auxiliary inner cylinder 38, and similarly, the second thin rubber elastic body 26 The extension length is longer than the actual distance between the orifice member 27 and the second auxiliary inner cylinder 39.

The one end of the outer cylinder 22 has a section L
A holding flange 40 having a U-shape extends, and a fixing flange 36 of the auxiliary outer cylinder 35 is overlapped on a base surface of the holding flange 40 which is orthogonal to the general surface of the outer cylinder 22. Further, a substantially annular elastic projection 41 is formed integrally with the first thin rubber elastic body 24 at the other end of the outer cylinder 22. In FIG. When displaced downward by more than the set amount, the stopper plate 30
, And elastically restricts the excessive displacement.

In the above configuration, when the inner cylinder assembly 33 and the outer cylinder assembly 34 are assembled, as shown in FIG. 1, the outer cylinder assembly 34 is fixed on the mounting base B in a predetermined liquid. The inner cylinder assembly 33 is lowered in this state, and the inner cylinder 21 and the auxiliary outer cylinder 35 of the inner cylinder assembly 33 are pressed into the auxiliary inner cylinders 39, 38 and the outer cylinder 22 of the outer cylinder assembly 34, respectively. Fix it. At this time, a jig 42 as shown in FIGS. 1 and 5 is used, and the inner cylinder 2 with respect to the auxiliary inner cylinders 39 and 38 is used.
1 and the axial positions of the auxiliary inner cylinders 39 and 38 with respect to the outer cylinder 22 are adjusted as set.

That is, the jig 42 is disposed at a central position below the inner cylinder assembly 33 when the inner cylinder assembly 33 and the outer cylinder assembly 34 are assembled. Support surface 4
2a and an inner cylinder support surface 42b slightly recessed from the auxiliary inner cylinder support surface 42a are formed. The height of the auxiliary inner cylinder support surface 42a is equal to the height of the first auxiliary inner cylinder 38 before the inner cylinder 21 is press-fitted when the outer cylinder assembly 34 and the jig 42 are installed on the mounting base B. The predetermined interval L is set between them. In this state, when the inner cylinder assembly 33 is lowered with respect to the outer cylinder assembly 34, first, the auxiliary inner cylinders 39 and 38 are pressed by the inner cylinder 21 to deform the thin rubber elastic bodies 26 and 24. , These rubber elastic bodies 26, 2
Due to the deformation of 4, the first auxiliary inner cylinder 38 comes into contact with the auxiliary inner cylinder support surface 42 a of the jig 42. Therefore, when the inner cylinder assembly 33 is further lowered, the inner cylinder 21 is press-fitted into the auxiliary inner cylinders 39 and 38 until the tip of the inner cylinder 21 contacts the inner cylinder support surface 42b of the jig 42. At this time, the auxiliary outer cylinder 35 is press-fitted into the outer cylinder 22 at the same time. Therefore, when the distal end portion of the inner cylinder 21 contacts the inner cylinder support surface 42a of the jig 42, the auxiliary inner cylinders 39, Is also determined.

Since one end of the inner cylinder 21 and one end of the outer cylinder 22 are connected by the thick rigid rubber elastic body 23 having high rigidity via the auxiliary outer cylinder 35, the outer cylinder 22 is connected to the outer cylinder 22 even after the press-fitting operation is completed. The axial positional relationship between the inner cylinders 39 and 38 is maintained as it is.

The auxiliary inner cylinder supporting surface 42 of the jig 42
thin rubber elastic bodies 26, 24 determined by the height of a
Is set such that each of the rubber elastic bodies 26 and 24 faces in a direction substantially perpendicular to the outer cylinder 22. Therefore, the deformation of each of the rubber elastic bodies 26 and 24 is a deformation that shortens the extension length, that is, a compression deformation.

The inner cylinder 21 and the auxiliary inner cylinder 3
9, 38, when the press-fitting of the auxiliary outer cylinder 35 and the outer cylinder 22 is completed, finally, the distal end of the holding flange 40 of the outer cylinder 22 is bent toward the upper surface side of the fixing flange 36 of the auxiliary outer cylinder 35, And the auxiliary outer cylinder 35 are caulked and fixed, and the entire assembling work is completed.

The anti-vibration mount thus assembled is
Since preliminary compression is applied to the first and second thin rubber elastic bodies 24 and 26, the first and second thin rubber elastic bodies 2
4 and 26 both have a sufficient margin against deformation in the shearing direction due to the input of the axial vibration, and are less susceptible to deterioration over time. In particular, the second thin rubber elastic body 26 cannot secure a sufficient radial length due to the arrangement of the orifice member 27 on the outer peripheral side thereof, and its shear strain tends to increase, but as described above. By applying pre-compression, the increase in shear strain can be effectively suppressed, and the durability can be improved.

Also, the first and second thin rubber elastic bodies 24 and 2
6 is pre-compressed by the inner cylinder assembly 33 and the outer cylinder assembly 3
Since it is performed at the same time as the assembling of No. 4, it is possible to manufacture at a low cost because the number of processing steps is not greatly increased.

The embodiment of the present invention is not limited to the above-described embodiment.
When the outer cylinder assembly 34 is assembled with the first thin rubber elastic body 24,
The case where the pre-compression is applied to both the first and second thin rubber elastic bodies 26 has been described, but the pre-compression may be applied to only one of them. Further, the type of the anti-vibration mount may not have the thin rubber elastic body that divides the liquid chamber into two chambers.

[0028]

As described above, according to the first aspect of the present invention, the thin rubber elastic body has its inner peripheral edge side inclined in the direction in which the inner cylinder enters when the inner cylinder assembly and the outer cylinder assembly are assembled. The inner cylinder and the auxiliary inner cylinder are fitted and fixed so that the thin rubber elastic body is compressed and deformed in a direction substantially perpendicular to the outer cylinder. Preliminary compression can be applied to the thin rubber elastic body without any special post-processing after the fitting of the inner cylinder, and as a result, the thin rubber can be thinned without increasing the manufacturing cost due to an increase in the number of processing steps. The durability of the thin rubber elastic body can be improved by providing a margin for deformation of the elastic body in the shear direction.

According to a second aspect of the present invention, in the first aspect of the present invention, the outer cylinder assembly has an outer cylinder and a first cylinder disposed on an inner periphery thereof.
An auxiliary inner cylinder and a second auxiliary inner cylinder, a first thin rubber elastic body that connects the outer cylinder and the first auxiliary inner cylinder to form one end wall of the liquid chamber, and the outer cylinder and the second auxiliary A second thin rubber elastic body that connects the inner cylinder and separates the liquid chamber into two chambers; and an orifice member interposed between the outer cylinder and the second thin rubber elastic body to communicate the two chambers. , So that the first thin rubber elastic body and the second thin rubber elastic body are simultaneously efficiently and pre-compressed without increasing the manufacturing cost due to an increase in the number of processing steps, thereby ensuring the durability of both. Can be improved.

According to a third aspect of the present invention, the thin rubber elastic body is formed in advance so that its inner peripheral edge side is inclined in a direction in which the inner cylinder enters when the inner cylinder assembly and the outer cylinder assembly are assembled. In addition, when assembling the inner cylinder assembly and the outer cylinder assembly, the thin cylinder rubber elastic body is compressed and deformed so as to face a direction substantially perpendicular to the outer cylinder, and the inner cylinder and the auxiliary inner cylinder are combined. Since the fitting and fixing are performed, the number of processing steps is reduced as compared with the conventional one in which the rubber elastic body is pre-compressed by drawing after completing the assembly of the inner cylinder assembly and the outer cylinder assembly. Production at low cost is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing the embodiment.

FIG. 3 is an exemplary sectional view taken along the line AA of FIG. 2 showing the embodiment;

FIG. 4 is a sectional view showing the embodiment.

FIG. 5 is a sectional view showing the embodiment.

FIG. 6 is a sectional view showing a conventional technique.

[Explanation of symbols]

 21: inner cylinder, 22: outer cylinder, 23: thick rubber elastic body, 24: first thin rubber elastic body, 25: liquid chamber, 26: second thin rubber elastic body, 27: orifice member, 33: inner cylinder Assembly: 34: outer cylinder assembly; 35: auxiliary outer cylinder; 38: first auxiliary inner cylinder; 39: second auxiliary inner cylinder.

Claims (3)

[Claims] 1. An inner cylinder assembly in which an inner cylinder and an auxiliary outer cylinder disposed on the outer periphery thereof are connected by a thick rubber elastic body, and an outer cylinder and an auxiliary inner cylinder disposed on the inner periphery thereof are provided. An outer cylinder assembly connected by a thin rubber elastic body thinner than the thick rubber elastic body, wherein the inner cylinder and the auxiliary outer cylinder of the inner cylinder assembly are the auxiliary inner cylinder of the outer cylinder assembly. In a liquid-sealed anti-vibration mount in which a liquid chamber is formed between the inner and outer cylinders by being fitted and fixed to outer cylinders, respectively, The thin rubber elastic body is formed so as to be inclined in a direction in which the inner cylinder enters when the assembly is assembled, and the thin rubber elastic body is compressed and deformed in a direction substantially perpendicular to the outer cylinder. A liquid-filled anti-vibration mount characterized by fitting and fixing the cylinder and the auxiliary inner cylinder. 2. An outer cylinder assembly comprising: an outer cylinder, a first auxiliary inner cylinder and a second auxiliary inner cylinder disposed on an inner periphery thereof, and connecting the outer cylinder and the first auxiliary inner cylinder to each other. A first thin rubber elastic body that forms one end wall of the liquid chamber, a second thin rubber elastic body that connects the outer cylinder and the second auxiliary inner cylinder and separates the liquid chamber into two chambers, The liquid-filled anti-vibration mount according to claim 1, further comprising an orifice member interposed between the outer cylinder and the second thin rubber elastic body to communicate the two chambers. 3. An inner cylinder assembly in which an inner cylinder and an auxiliary outer cylinder disposed on the outer periphery thereof are connected by a thick rubber elastic body, and an outer cylinder and an auxiliary inner cylinder disposed on the inner periphery thereof are provided. An outer cylinder assembly connected by a thin rubber elastic body thinner than the thick rubber elastic body, wherein the inner cylinder and the auxiliary outer cylinder of the inner cylinder assembly are the auxiliary inner cylinder of the outer cylinder assembly. In a method of manufacturing a liquid-sealed anti-vibration mount in which a liquid chamber is formed between the inner and outer cylinders by being fitted and fixed to outer cylinders, respectively, the thin rubber elastic body has an inner peripheral edge side of the inner cylinder assembly. When the inner cylinder assembly and the outer cylinder assembly are assembled, the thin rubber elastic body is formed in advance so as to be inclined in the direction in which the inner cylinder enters when the outer cylinder assembly is assembled. The inner cylinder and the auxiliary inner cylinder are fitted and fixed while being compressed and deformed so as to face a direction substantially perpendicular to the outer cylinder. Method of manufacturing a fluid-filled elastic mount according to claim.