JPS6210517Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to vibration isolating rubber that alleviates vibrations transmitted from equipment installed on the foundation to the foundation, or from the foundation to equipment, and its purpose is to reduce the amount of compression. The purpose of the present invention is to provide a vibration-proof rubber with excellent ability to absorb high-frequency vibrations.

In the past, various vibration isolators have been proposed and implemented, but since vibration isolators consisting of a single rubber block use only rubber with a certain hardness, their vibration absorption performance is limited even if various improvements are made to the shape. There are limits to the ability to absorb high-frequency vibrations, especially between 50 and 200 Hz, which causes noise.

The present invention was developed to solve the above-mentioned problems.The wall surrounding the cavity of the elastic hollow body is divided into upper and lower parts, and the upper part is made of a low-hardness, low-elasticity rubber compound, and the lower part is made of a high-hardness, high-elasticity rubber compound. forming the hollow body using a material,
The cavity is characterized in that it is provided with a separator plate having a passage having a valve seat and an arbitrary number of small holes, a valve body for the valve seat, and is filled with fluid and sealed.

Hereinafter, the present invention will be explained with reference to an illustrated embodiment. 1 is an elastic hollow body, 2 is a cavity, 3 is a separator, and 4 is a hollow body.
Reference numeral 1 indicates a port in the center of the plate, 5 a valve seat, 6 a small hole, 7 a valve body, 8 a fluid, 9 an iron plate, and 10 a mounting bolt, which are constructed as follows.

The elastic hollow body 1 has a bottom portion 11 to a lower half portion 1 of the peripheral wall.
The lower half A including 2 and the upper half 13 of the peripheral wall 14 to the top 14
The material of the lower half A is made of a rubber compound having higher hardness and higher elasticity than the material of the upper half B, and is formed into a cylindrical shape having a cavity 2.

The separator plate 3 is made of a rigid material such as a steel plate, and has a slightly large diameter port 4 in the center and a valve seat 5 on the top surface of the port.
A small hole 6 is provided at the periphery, and the separator plate 3 is held horizontally at the boundary between the lower half A and the upper half B of the elastic hollow body 1.

The valve body 7 is fixed so as to face the valve seat 5 of the separator plate 3 and protrude below the center of the elastic hollow body top 14, and when the valve body 7 comes into contact with the valve seat 5, the passage 4 is closed. It was designed to open when you leave.

In addition, a rubber cover 15 is provided on the valve body 7 as necessary.
will be established. As the fluid 8, the cavity below the separator plate 3 is filled with a high viscosity fluid such as silicone oil or ethylene glycol, which does not adversely affect the materials constituting the hollow body or the separator plate.

The iron plate 9 is fixed to the back surface of the bottom portion 11 and the top surface of the top portion 14, and mounting bolts 10 are provided respectively.

To describe the effect achieved by the above configuration with reference to the diagram, in the case of vibration with a small amount of compression, the vibration is absorbed by the lower half B, which has low hardness and low elasticity, and in the case of vibration with a large amount of compression, the vibration is absorbed by the elastic hollow body. When vibration is applied to the valve 1 and it is compressed, the valve body 7 comes into contact with the valve seat 5, and the port 4 closes, allowing the fluid 8 to exit upward through the small hole 6, making it possible to absorb high-frequency vibrations well due to the viscosity and inertia of the fluid. I can do it. At this time, by providing the rubber cover 15 on the valve body 7, the passage is completely sealed, and the collision noise between the valve body 7 and the valve seat 5 is eliminated. Further, when the valve body 7 is extended, the valve body 7 separates from the valve seat 5 and the port 4 opens, so that the fluid that first came out to the upper side of the separator plate 3 can easily return to the lower side through the port 4. As mentioned above, since the lower half A of the elastic hollow body 1 is made of high hardness rubber and the upper half B is made of low hardness rubber, even when vibration with a large amount of compression is applied, only the upper half B deforms greatly and the lower half A Without being deformed, the valve body 7 contacts the valve seat 5 due to compressive deformation of the upper half B and pushes the separator plate 3 while blocking the through hole 4, so the fluid 8 under the plate flows from the small hole 6 to the upper side of the plate. It encounters resistance as it exits to the outside, and during that time it absorbs high-frequency vibrations well and exhibits a sufficient vibration-proofing effect.

The present invention has the above-mentioned configuration and performance, and the amount of compression absorbs vibrations in a wide range and also absorbs high-frequency vibrations, and can exhibit the desired vibration-proofing effect, making it an excellent product with high practical value. It is an idea.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a perspective view of a separator. 1 is an elastic hollow body, 2 is a cavity, 3 is a separation plate, 4 is a port, 5 is a valve seat, 6 is a small hole, 7 is a valve body, 8 is a fluid, 9 is an iron plate, 10 is a bolt, 11 is a hollow Body bottom, 12 is the lower half of the peripheral wall, 13 is the upper half of the peripheral wall, 14
15 is the top of the hollow body, 15 is the rubber cover, A is the lower half of the hollow body, and B is the upper half of the hollow body.

Claims (1)

[Scope of utility model registration request] The hollow body is formed by dividing the wall surrounding the cavity of the elastic hollow body into upper and lower parts, using a low-hardness, low-elasticity rubber compound in the upper part and a high-hardness, high-elasticity rubber compound in the lower part. 1. A vibration isolating rubber comprising: a separator plate having a passage having a seat and an arbitrary number of small holes; a valve body for the valve seat;