JPS589009Y2 - Anti-vibration support with damping ability - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolating support, particularly to a vibration isolating support having a damping ability suitable for an automobile engine mount.

As a vibration-proof support for a vibration source such as an automobile engine, a vibration-proof support A consisting of a rubber body 3 sandwiched between upper and lower mounting brackets 1 and 2 as shown in FIG. 1 has conventionally been used. However, if a general rubber material is used, the damping performance will be insufficient, and the amplitude will be excessive when the button resonates.

In addition, if a rubber material with particularly high damping performance is used, dynamic elasticity (
This has the disadvantage that the dynamic spring constant) increases and the vibration isolation performance decreases.

In order to improve these drawbacks, an attempt has been made to attach an oil damper B in combination with the vibration isolation support A as shown in Fig. 2.In addition to requiring installation space for the wall oil damper B, there are also problems with the properties of the oil damper B. The damping force could only be obtained in one direction upward (vertical direction in the figure) and could not be said to be sufficient.

In the figure, 4 is a mount base, 5 is a vibration source, and 6 is a bracket.

This invention attempts to improve the above-mentioned drawbacks of the conventional technology by imparting damping performance to the vibration isolation support, and in particular, this damping performance is effective against motion in multiple directions. The present invention provides a vibration-proof support having the following.

That is, the object of this invention is to advantageously and easily utilize the internal damping force of a viscoelastic body, and to integrate the damping element into a vibration-proof support.

This invention is based on a vibration-proof support consisting of a rubber elastic body, a top mounting bracket that clamps the rubber elastic body from above and below, and a bottom mounting bracket. and bending the lower mounting bracket downward to form a recurved periphery, and bending the periphery of the lower surface mounting bracket to the outside of the upper mounting bracket to surround the recurved periphery to form a recurved periphery. A viscoelastic body made of unvulcanized rubber is interposed in the gap between the curved edges.

Specifically, this type of viscoelastic material includes, for example, butadiene acrylonitrile rubber, polyimbutylene rubber, and ethylene-acrylonitrile rubber.
Propylene rubber, ethylene-propylene-genter polymer rubber as base material, vinyl chloride, polybutene,
An example is an unvulcanized rubber composition containing an inorganic filler.

If it has excellent elasticity, it can be handled in the same way as vulcanized rubber and is generally incorporated by press-fitting, but if it has excellent viscosity, it can be assembled using a pouring method.

The rubber elastic body formed in both metal fittings is preferably formed so as not to be in direct contact with the inner periphery but to be separated from the gap, and in some cases, the rubber elastic body and this inner periphery may be separated from each other. A viscoelastic material can also be enclosed in the gap between the two.

Figure 3 shows the perspective appearance of the vibration isolating support of this invention;
The figure shows a cross section at the center of FIG.

This anti-vibration support body consists of a rubber elastic body 11 and mounting fittings 12 and 13 that sandwich it from above and below.

These mounting fittings each have a curved peripheral edge 12', 13', and a gap g is provided between the curved peripheral edges 12', 13' without directly contacting them.

The viscoelastic body 14 is press-fitted into this gap.

In the figure, 15 and 16 are the mount base and vibration source (not shown)
17 is a mounting plate.

Although there is a small space 18 between the curved peripheral edge 12', the rubber elastic body 11, and the mounting bracket 13, due to the nature of the viscoelastic body 14,
Although it is thought that a viscoelastic body fills this small space, it is also possible to fill this small space 18 with a viscoelastic body (not shown) in advance as described above.In this way, according to this invention, Since the two pairs of upper and lower mounting brackets each have a curved peripheral edge that surrounds one of the mounting brackets, this prevents, to some extent, the displacement of the rubber elastic body that is sandwiched between the mounting brackets and is vulcanized and bonded in the shearing direction. Not only does the recurved periphery provide a reliable stopper function without using any other material, but it also prevents the deformation of the viscoelastic body interposed in the gap g that allows the above displacement. At times, the internal damping capacity generated inside the damping force can be used as a damping force.

Because the damping element is integrated into the vibration isolating support, even though it has a high damping capacity, the vibration isolating support does not take up any extra space to install, and it also has a spring function. Since the and damping functions are expressed in separate materials, a vibration-proof support with high damping performance can be obtained without increasing the dynamic spring constant, and the rubber elastic body and the viscoelastic body are integrated into one. Furthermore, there is no need for the use of cumbersome fluids, etc., which are commonly used to provide damping capability.

As a result, the design is extremely simple and the product is compact, and the vibration-proof support of the present invention has viscoelastic columns that exhibit damping ability along the inner and outer peripheral edges. There is an advantage in that an effective damping ability is provided not only for directional movement but also for lateral movement in all ψ directions.

[Brief explanation of the drawing]

Figures 1 and 2 are external views showing conventional vibration-proof supports, and Figure 3 is
The figure is a perspective view showing the support of this invention, and FIG. 4 is a sectional view taken at the center of FIG. 3. 11...Rubber elastic body, 12.13...Mounting bracket, 1
4...Viscoelastic body.

Claims (1)

[Claims for Utility Model Registration] 1. The above-mentioned top mounting bracket is attached to a vibration-proof support body consisting of a rubber elastic body 11, a top mounting bracket 13 that clamps the rubber elastic body from above and below, and a bottom mounting bracket 12. 13 is bent downward along the periphery of the rubber elastic body to form a recurved periphery 1.
3', and bend the peripheral edge of the lower surface mounting bracket 12 to the outside of the upper surface mounting bracket so as to surround the recurved peripheral edge 1 to form a recurved peripheral edge 12' - these recurved peripheral edges 13' ,
A vibration isolating support body having a damping ability and having a viscoelastic body 14 made of unvulcanized rubber interposed in the gap between the spaces 12'. 2. The viscoelastic body mainly composed of unvulcanized rubber is made of one or more rubbers selected from butadiene acrylonitrile rubber, polyimbutylene rubber, ethylene-propylene rubber, and ethylene-propylene-diene terholmer rubber. A vibration-proof support having a damping ability as set forth in claim 1 of the registered utility model claim, which is used as a base material.