JPS62127536A - Vibro-isolating device - Google Patents

Abstract

PURPOSE:To make a pair of plates stickable fast without fail, and dispense with a positioning job in setting operation as well as to make manufacture so as to become so simple but accurate, by piercing a projection jutting out of one side of the paired plates through a hole of the other side plate. CONSTITUTION:A diaphragm 20, plates 22 and 24 and a support plate 26 are attached to a step part 18 of a base plate 12. A peripheral part of rubber 30 constituting a vibro-isolating main body is vulcanizedly stuck to the support plate 26, and a top plate 32 is vulcanizedly stuck to the inner circumferential part. At the time of vibrations in an engine to be mounted on this top plates 32, these vibrations are absorbable with resistance of internal friction of the rubber 30 is well as vibrations are absorbable with resistance when each fluid of an upper small fluid chamber 36A and a lower small fluid chamber 36B circulates through an orifice 40. In addition, at the time of high frequency vibration, even if the orifice 40 is loaded, it is absorbable with vibrations of a vibrator 52.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vibration isolating device used in engine mounts, body mounts, etc. of automobiles.

[Background technology and matters to be solved]

As a vibration isolating device used in an engine mount or the like, a structure is used in which a pair of small liquid chambers are communicated through an orifice, and vibrations are absorbed by passage resistance of the liquid during vibration.

In this case, the orifice is a shallow groove carved into the outer periphery of the molded product.
This molded product is inserted into a cylindrical material to form a spiral orifice (see Japanese Patent Laid-Open No. 55-107142). In another vibration isolator, grooves are formed on the opposing surfaces of a pair of plates.
These plates are joined to form an orifice between them (see Japanese Patent Laid-Open No. 57-9.340).

Therefore, in these vibration isolators, it is necessary to reliably bond the molded product for forming the orifice, the cylindrical material, the plate material, etc. by welding. For this reason, accurate positioning work is required before welding work, and quality control of welding work is also complicated.

The present invention takes the above-mentioned facts into account and aims to provide a vibration isolator whose orifice is easy to manufacture.

[Summary and operation of the invention]

The vibration isolator according to the present invention is a vibration isolator in which an orifice is provided between a pair of materials to be joined, and a plurality of small liquid chambers are communicated through the orifice, and the vibration isolator is punched from one of the pair of plate materials. It is characterized in that a protrusion is integrally protruded, the protrusion is passed through a hole formed in the other plate, and the pair of plates is fixed together by caulking.

Therefore, in the present invention, the pair of plate materials can be reliably fixed by passing the protrusion protruding from one of the pair of plate materials into the hole of the other and caulking the penetrating protrusion.

By arranging the corresponding positions of the protrusions and holes in a predetermined manner, positioning is not necessary during assembly work, and simple and reliable manufacturing is possible.

[Embodiments of the invention]

FIG. 1 shows a first embodiment of a vibration isolator 10 to which the present invention is applied. In this vibration isolator flO, a mounting bolt 14 protrudes from approximately the center of the base plate 12 to be fixed to the vehicle body.

A standing wall 16 is formed in the intermediate portion of the base plate 12, and the upper end of this standing wall 16 is bent horizontally to form a stepped portion 18.

This stepped portion 18 has a diaphragm 20. Plate materials 22 and 24 and a support plate 26 are placed, and these are held between the stepped portion 18 by a caulking portion 28 protruding from the tip of the stepped portion 18.

The upper end of the support plate 26 is tapered,
The outer periphery of the rubber 30 constituting the vibration absorbing body is vulcanized and bonded. A top plate 32 is vulcanized and bonded to the inner circumference of the rubber 30, and mounting bolts 34 protrude to securely mount an engine (not shown).

The diaphragm 20, the support plate 26, and the top plate 32 constitute a liquid chamber 36, into which plates 22, 24 are arranged.

As shown in FIG. 2, the plate material 24 has a standing wall 24A formed in the middle part, and a flat plate part 24B is formed from the top of this standing wall 24'A.
are continuous.

Similarly, the plate material 22 is formed with a standing wall 22A and a flat plate part 22B, and the standing wall 22A is in close contact with the inner peripheral part of the standing wall 24A, and the flat plate part 22B is in close contact with the lower surface of the flat plate part 24B.

A substantially C-shaped stepped portion 22C is formed at the boundary between the vertical wall 22A and the flat plate portion 22B.

Therefore, this stepped portion 22C is formed on the plate material 2 as shown in FIG.
2 and the plate material 24 are fixed together, an elongated C-shaped orifice 40 is formed between them. This orifice 40 includes a circular hole 42 formed in the flat plate portion 24B and a stepped portion 22C.
The liquid chambers 36 are communicated with each other through circular holes 44 formed in the respective holes 44 . That is, the plate material 22 and the plate material 24 form the liquid chamber 36.
is divided into an upper liquid chamber 36A and a lower liquid chamber 36B,
The upper liquid chamber 36A and the lower liquid chamber 36B are configured to communicate through an orifice 40.

Here, a plurality of (three in this embodiment) punched-out protrusions 46 are formed on the plate 24 toward the plate 22, and correspond to circular holes 48 provided in the plate 22. These punched protrusions 46 have a length that allows them to pass through the circular holes 48, and their penetrating tips are caulked and fixed to the lower surface of the plate material 22, thereby firmly connecting the plate materials 22 and 24.

Although it is possible to form these punched projections 46 and circular holes 48 at equal intervals around the center of the plate material 22, 24, by changing the mutual spacing, it is possible to form a plurality of punched projections 4.
Plate material 22 and plate material 24 for all of 6 to enter into circular hole 48
The relative position with respect to the main body is limited to one place, thereby preventing incorrect assembly.

A center hole 50 is formed in each of the flat plate portions 22B and 24B, so that a diaphragm 52 can be attached thereto. This diaphragm 52 can be moved by a small amount in the thickness direction of the plates 22 and 24, so that even if the orifice 40 becomes clogged during high-frequency vibration, it can be moved slightly to absorb the high-frequency vibration. ing.

In this manner, in this embodiment, the orifice 40 can be easily manufactured by simply inserting the punched projection 46 into the circular hole 48 and caulking the plate materials 22, 24. Therefore, the work of aligning the plates 22 and 24 is easy, and welding is not necessary.

When the engine mounted on the top plate 32 vibrates, the vibration can be absorbed by the resistance due to internal friction of the rubber 30.
The liquid in the upper liquid chamber 36A and the lower liquid chamber 36B flows through the orifice 4.
Vibration can be absorbed by the resistance when flowing through 0. Furthermore, even if the orifice 40 becomes clogged during high-frequency vibrations, the high-frequency vibrations can be absorbed by the vibrations vi and 52.

Next, FIG. 3 shows an orifice forming structure according to a second embodiment of the present invention.

In this embodiment, the plate members 22 and 24 are joined to form an orifice as in the previous embodiment, but in this embodiment, the stepped portion 22C as in the previous embodiment is not provided, and the flat plate portion 22B has a planar shape. A C-shaped a54 is provided.

A circular hole 44 is bored at one end of this hole 54, and a groove 5 is formed.
A circular hole 42 is provided in the flat plate portion 24B corresponding to the other end of the flat plate portion 24B.

Also in this embodiment, the fixing structure between the plate materials 22 and 24 is achieved by penetrating the punched protrusion 46 into the circular hole 48 and caulking it in the same manner as in the previous embodiment. Therefore, in this embodiment, an orifice is formed between the groove 54 and the bottom surface of the flat plate portion 24B.

Next, FIG. 4 shows a third embodiment of the present invention. In this embodiment, a flexible diaphragm 56 is used in place of the diaphragm 52 of the first embodiment. This flexible diaphragm 56 is arranged in an intermediate chamber 58 between the raised part 24C formed on the flat plate part 24B and the flat plate part 22B, and is located in the raised part 24C1.
The liquid in the upper liquid chamber 36A and the lower liquid chamber 36B can enter the intermediate chamber within 5 days through a plurality of small holes 60, 62 formed in the flat plate portion 22B. Therefore, during high frequency vibrations, the flexible diaphragm 5G vibrates due to the vibrations transmitted through these small holes 6o, 62, and as a result, the high frequency vibrations are absorbed.

Also in this embodiment, the fixing structure between the plate material 22 and the plate material 24 is the same as in each of the above embodiments, and the same effects can be obtained.

Next, FIG. 5 shows an orifice forming structure according to a fourth embodiment of the present invention. In this embodiment, the orifice is fixed by a combination of a punched projection 46 and a circular hole 48, as in the previous embodiments. Board material 64.66
cylindrical portions 64A and 66A are formed in the center so that they come into close contact with each other. There is a tapered portion 64B between the plate material 64 and the cylindrical portion 64A, and a tapered portion 66B between the plate material 66 and the cylindrical portion 66A. This is a configuration in which an orifice 40 is formed between.

The orifices 40 communicate with the small liquid chambers through circular holes 42,44 formed in the tapered portions 64B, 66B, respectively. Further, the orifice 40 has a C-shaped planar shape as in each of the embodiments described above, and the tapered portion 64B and the tapered portion 66B are in close contact with each other at a portion around the axis.

Therefore, in this embodiment as well, the same effects as in the previous embodiment can be obtained.

Next, FIG. 6 shows an orifice forming structure according to a fifth embodiment of the present invention.

This embodiment is similar to the previous embodiments in that the plates 22, 24 are fixed to each other by the punched projection 46 and the circular hole 48, but the plates 22, 24 are adjacent to the orifice 40, It holds 70.72. These disc materials 70
．． 72 are caulked together at the outer periphery, and the plates 22.
It is held between 24.

The outer periphery of a disc-shaped rubber 74 is vulcanized and bonded to these disc members 70 and 72 and is held therebetween.

These rubbers 74 have a hollow part 76, and this hollow part 76
A synthetic resin plate 78 is arranged to partition the hollow portion 76, and the periphery of the synthetic resin plate 78 is sandwiched between disk members 70 and 72 with a rubber 74 in between. For this reason, the central portion of the rubber 74 contracts the hollow portion 76 due to the pressure increase in the small liquid chamber and moves until it hits the synthetic resin plate 78, so that high frequency vibrations can be absorbed.

In this embodiment, the disk members 70, 72 are fixed to the plate members 22, 24 by a caulking structure, so that no welding work is required and assembly is possible without adversely affecting the synthetic resin plate 78.

〔Effect of the invention〕

As explained above, the vibration isolator according to the present invention is a vibration isolator in which an orifice is provided between a pair of plate materials to be joined, and a plurality of small liquid chambers are communicated through the orifice, The ejection protrusion integrally protrudes from one side,
The feature is that the protrusion is passed through a hole formed on the other side and caulked to secure the pair of plates together, eliminating the need for welding work.1. It has an excellent effect of simplifying II attachment.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the vibration isolator according to the present invention, FIG. 2 is an exploded perspective view of the plate material used in FIG. 1, and FIG.
The figure is an exploded perspective view showing the plate material used in the second embodiment of the present invention, and FIGS. 4 to 6 are the third to fifth embodiments of the present invention, respectively.
It is a sectional view of the board material showing an example. 10... Vibration isolator, 22.24... Plate material, 36... Liquid chamber, 40... Orifice, 46... Embossing projection, 48... Circular hole, 64.66... Board material.

Claims (1)

[Claims] (1) A vibration isolator in which an orifice is provided between a pair of plate materials to be joined, and a plurality of small liquid chambers are communicated through the orifice, and a punching projection is integrally projected from one of the pair of plate materials. A vibration isolating device characterized in that a pair of plates are fixed together by passing the protrusion through a hole formed in the other plate and caulking the protrusion to a hole formed in the other plate.