JPS6235126A - Fitting structure of stopper for vibration isolator - Google Patents

Abstract

PURPOSE:To facilitate the work to screw a nut so as to be fitted on the end of a core bar or the fitting work by protruding a part of an elastic body provided between an inner cylinder and an outer cylinder into the inside of the inner cylinder so as to prevent the core bar inserted in the inner cylinder from falling down. CONSTITUTION:Rubber 18 being an elastic body is bonded by vulcanization between an inner cylinder 20 and an outer cylinder 10, and a part of the elastic body is protruded 32 into the inner cylinder 20. While a stopper plate 22 restraining the relative movement between the inner cylinder 20 and the outer cylinder 10 within a prescribed value is fitted to the inner cylinder 20 with a bolt 24 being a core bar, this bolt 24 is inserted through the inside of the inner cylinder 20, a cab 26, etc. and is fixed by a nut 28. Since the bolt 24 is prevented from falling down by the elastic body protruded into the inside of the inner cylinder 20, when the nut 28 is screwed in, it is unnecessary to hold the bolt 24 by hand, and the work can be facilitated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in a vibration isolating device that absorbs vibrations in the direction of relative movement between an inner cylinder and an outer cylinder by an elastic body interposed between an inner cylinder and an outer cylinder. , relates to a stopper attachment structure for attaching a stopper to an inner cylinder for restricting relative movement.

[Background technology and issues to be solved] In shear type vibration isolating rubber, an elastic body is vulcanized and bonded between the inner and outer cylinders, and one of the inner and outer cylinders is connected to the vehicle body, and the other to the body.
By attaching it to the cab etc.

It is designed to absorb vehicle body vibrations.

In this vibration isolator, an inner cylinder hem stopper is attached to restrict movement of the inner and outer cylinders beyond a predetermined value.

This stopper is attached to the inner cylinder by inserting a bolt used as a mandrel into the inner cylinder and screwing a nut onto the protruding tip.

When installing this stopper, after inserting the bolt into the inner cylinder, it is necessary to hold this inserted state with one hand while tightening the nut with the other hand, which reduces work efficiency due to the installation location. It is the cause.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to obtain a stopper mounting structure for a vibration isolator, which allows a stopper to be easily mounted.

[Summary and operation of the invention] In the stopper mounting structure for a vibration isolator according to the present invention, an elastic body is provided between the outer cylinder and the inner cylinder, and absorbs vibrations in the relative movement direction of the inner and outer cylinders, and also absorbs vibrations to the inner cylinder. Used in a vibration isolating device into which a mandrel of a stopper that limits the relative movement is inserted, wherein a part of the elastic body protrudes from the inner cylinder and is used for abutting the mandrel. There is.

Therefore, in the present invention, when the mandrel is inserted into the inner cylinder, the protruding part of the elastic body comes into contact with the mandrel, thereby preventing the mandrel from falling off.

Therefore, the operator only has to screw the nut onto the tip of the mandrel protruding from the inner cylinder, which significantly improves work efficiency.

[Embodiments of the Invention] Fig. 1.2 shows a vibration isolator to which the stopper mounting structure according to the first embodiment of the non-explosion circle is applied.

The outer cylinder 10 has a bent portion 12 at one end in the axial direction, and is similarly bent at the other end in the axial direction. Extended flange portion 14
is provided. This flange portion 14 has a mounting hole 16.
is formed and is adapted to be attached to an automobile frame (not shown).

Rubber 18, which is an elastic body, is vulcanized and bonded to the inner periphery of the outer cylinder 10, and this rubber 18 is vulcanized and bonded into a row of inner cylinders 20 arranged coaxially with the outer cylinder 10.

A substantially central portion of the stopper plate 22 is in contact with the lower end portion of the inner cylinder 20 . This stopper plate 22 has a circumferential edge disposed below the flange portion 14, and has an outer cylinder 10 and an inner cylinder 22.
It is designed to limit large relative movement in the downward direction with respect to FIG.

A bolt 24 that is a metal core passing through the stopper plate 22
The middle part penetrates inside the inner cylinder 20, and the -1 end part protrudes. The upper end of this bolt 24 is attached to the inner cylinder 20-1-.
The nut 28 is configured to pass through the cab 26 and be screwed onto the tip end thereof.

Thereby, the bolt 24 can fix the cab 26 to the inner cylinder 20 together with the stopper plate 22.

As shown in FIG. 3, the inner cylinder 20 has notches 30 formed at both ends in the axial direction, and a portion of the rubber 18 extends through the notches 30 to form an extension 32 extending to the inner periphery of the inner cylinder 20.

This extension 32 is connected to the rubber 18 as shown in FIG. 1.2.
It has a shape that revolves around the inner cylinder 20 as well.

Therefore, the outer periphery of the bolt 24 inserted into the inner cylinder 20 comes into contact with a part of the extension part 32, producing a frictional force.

Next, the operation of this embodiment will be explained.

The outer cylinder 10 is attached to a vehicle body (not shown) using the flange part 14, and a cab 26 is mounted on the inner cylinder 20.

Here, the bolt 24 is inserted and penetrated into the inner cylinder 20 from below to above through the stopper plate 22.

The nut 28 is screwed into the penetrating tip, but since the inserted bolt 24 is in contact with the extension 32 before the nut 28 is screwed, a frictional force is applied between the bolt 24 and the extension 32, and the bolt is tightened. 24 will not fall off carelessly.

Therefore, in this state, the worker can easily screw the nut 28 onto the tip of the bolt 24, thereby attaching the stopper plate 22 and the cab 26 to the inner cylinder 20.

When the vehicle is running, the outer cylinder 10 is
．． The inner cylinder 20 relatively moves downward in FIG. Therefore, vibrations are absorbed by the internal friction of the rubber 18.

Also, if the relative movement is large, the stopper plate 22
comes into contact with the flange portion 14 to restrict relative movement beyond a predetermined value.

Note that in order to avoid direct contact between the stopper plate 22 and the flange portion 14, a portion of the rubber 18 is also extended below the flange portion 14.

Next, in a second embodiment of the present invention shown in FIG.
A part of the extension part 32 of the embodiment is removed and the extension part 32 protrudes toward the inner periphery of the inner cylinder 20 on one side of the inner cylinder 20 in the axial direction.

[Effects of the Invention] As explained below, in the stop collar mounting structure for a vibration isolator according to the present invention, an elastic body is provided between the outer cylinder and the inner cylinder to absorb vibrations in the direction of relative movement between the inner and outer cylinders. It is also used in a vibration isolating device in which a mandrel of a stopper that limits the relative movement is inserted into an inner cylinder, and a part of the elastic body protrudes from the inner cylinder and is used for contacting the mandrel. This feature has an excellent effect of making the stopper installation work easier.

[Brief explanation of the drawing]

1 is a cross-sectional view corresponding to the cross section taken along line I-I in FIG. 2 showing a vibration isolator to which the stopper mounting structure for a vibration isolator according to the present invention is applied; FIG. 2 is a top view of FIG. 1; FIG. 3 is a perspective view showing the inner cylinder of the first embodiment, and FIG. 4 is a cross-sectional view corresponding to a part of FIG. . 10... Outer cylinder, 18... Rubber, 20... Inner cylinder, 22... Φ conflict stopper plate, 24... Φ port, 26... Cab, 28... Fist, 30-・・・
Notch, 32...extension part.

Claims (1)

[Claims] (1) Vibration isolating device in which an elastic body is provided between the outer cylinder and the inner cylinder, and a mandrel of a stopper is inserted into the inner cylinder to absorb vibration in the direction of relative movement between the inner and outer cylinders and to limit the relative movement. A stopper mounting structure for a vibration isolator, characterized in that a part of the elastic body protrudes from the inner cylinder and is used for abutting the mandrel.