JPS61149634A - Vibration absorber - Google Patents

Abstract

PURPOSE:To efficiently absorb a vibrative wave applied across mounting beds, by the synergism action obtained from non-elastic deformation action of a gel-state material layer and damping action of a damper means. CONSTITUTION:A vibration absorber is constituted of an upper and a bottom mounting bed 10, 20 and an expansion-contraction part 30 and a damper means 40 interposed between a pair of these mounting beds. The expansion-contraction part 30 is constituted by a cylindrical body 31, connecting its end parts in the axial direction with the upper and the bottom mounting bed 10, 20 and having elasticity, and a gel-state material layer 32 formed in said cylindrical body 31 and filled with a gel-state material of about 50-200 penetration. A damper means 40, comprising a cylinder part 41 formed in an internal chamber of the upper mounting bed 10 and a piston part 42 provided in the bottom mounting bed 20 and fitted to the cylinder part 41, fills the cylinder part 41 with air. A vibration from the outside is absorbed by deformation of the gel-state mate rial layer 32 and the cylindrical body 31 and resisting force of the damper means 40.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention absorbs vibrations from vibration sources, such as motors, or prevents vibrations from being applied to precision measuring instruments, such as equipment that dislikes vibrations. This relates to vibration absorbers.

<Prior Art> This type of conventional vibration absorber uses elasticity of rubber, spring, cushion material, etc., and absorbs vibrations by deforming the elastic body.

<Problems to be Solved by the Invention> As mentioned above, in conventional vibration absorbers, vibrations are absorbed by the elastic deformation of the elastic body, so the rebound resilience of the elastic body causes new vibrations. Another problem is that some elastic bodies cause a resonance phenomenon, which impairs the vibration damping effect.

Means for Solving the Problems> The vibration absorber of the present invention has an elastic part made of an elastic material interposed between a pair of mounting bases facing each other, and this elastic part is made of a hollow cylindrical body. And, the penetration degree is 50 to 20 inside this cylindrical body.
The cylindrical body has a gel-like material layer made by filling about 0 gel-like material, and is constructed by connecting both axial ends of the cylindrical body to each of the pair of mounts, and the cylindrical body has a gel-like material layer made by filling a gel-like material of about 0. is provided with a damper means for attenuating vibration waves applied between the pair of mounts, and the vibration waves applied between the pair of mounts are dispersed and absorbed by the inelastic deformation of the gel-like material layer. The present invention is characterized by a book configured to be damped by the damper means.

Effect> The vibration absorber of the present invention absorbs the vibration waves applied between the mounting bases by the synergistic effect of the inelastic deformation action of the gel-like material layer and the damping action of the damper means.

The above-mentioned inelastic deformation of the gel-like material layer has the advantage of not producing rebound resilience, but gel-like materials with a penetration degree of about 50 to 200 have vibration wave transmission characteristics similar to those of liquids, so The vibration waves applied to the material layer are rapidly dispersed and differentiated while deforming the gel-like material layer, and are thereby absorbed in a wide area within the gel-like material layer.

On the other hand, the damper means damps the vibration waves as the gel material layer deforms.

That is, the action of this damper means increases the resistance force against deformation of the gel-like material layer, and therefore the vibration wave absorption effect within the gel-like material layer is promoted after the vibration waves are dispersed, so that the vibration waves are absorbed by the damper. It is quickly absorbed after the start of operation of the means.

This damper means cooperates with the elasticity of the cylindrical body of the extensible portion to set the basic resistance force of the vibration absorber of the present invention.

Therefore, the static pressure applied between the mounting bases is absorbed by the damper means and the telescopic part cylinder.

Embodiment The embodiment of the vibration absorber of the present invention shown in FIG.
20, and damper means 40 provided within the l pair of mounting bases.

The upper mount 1O has an inner chamber opening downward, and a cylinder portion 41 of the damper means 40 is provided in the inner chamber.

The extensible part 30 includes an elastic cylinder 31 whose upper end is fixed to the open end of the upper mounting base 10, and a gel formed by filling the cylinder with a gel-like substance having a penetration degree of about 50 to 200. The cylindrical body 31 has its lower end fixed to the upper surface side of the lower mounting base 20.

The gel-like material layer 32 receives the pressure applied between the pair of mounts 1O920, so that the lower surface is closed by the lower mount 20 and the upper surface is closed by the upper mount 10.
is closed at the end face.

For this purpose, a sleeve 11 forming the cylinder portion 41 is fitted into the inner chamber of the upper mounting base 10, and this sleeve 11 is in contact with the gel material layer 32.
2 may be closed with an elastic membrane (not shown) on its upper and lower surfaces, and the upper and lower mounting bases may be brought into contact with this elastic membrane, but in reality, when viewed from above, the cylinder body 31 is fixed to the upper and lower mounting bases 10 and 20. After that, the silicone resin stock solution is injected and filled into the cylinder 31.
Since the gel material layer 32 is then generated by heating and gelling this stock solution, an elastic membrane is rarely provided on the top surface of the gel material layer 32.

In order to inject the silicone resin liquid, a liquid injection port 12 and an exhaust hole 13 are provided in the upper mounting base lO.

The cylinder portion 4 is mounted on the lower mounting base 20.
1 is provided with a piston portion 42 that tightly fits into the cylinder portion 41 obtained by the operation of the piston portion 42.
A damper effect is obtained by compressing the air inside.

The upper mounting base 10 and the lower mounting base 20 are provided with mounting means, for example, mounting screws 14 and 21, respectively, so that the present vibration absorber is interposed between the objects A and B. , B. Absorbs vibration waves, that is, pressure, applied from either one so as not to spread to the other.

An example of the mounting base 10.20 is the lower mounting base 20 shown in FIG.
The mounting means and mounting base may be designed in any desired shape.

The damper means 40 may be constructed by providing a piston part 42 on the upper mounting base 10 and a cylinder part 41 on the lower mounting base 20, as shown in FIG. A coil spring 43 may be provided to set the basic resistance of the means.

The damper means 40 may be arranged outside the extensible portion 30 as shown in FIG. The propagation of inelastic deformation can be improved.

Since the vibration absorber of the present invention is as described above, when it is interposed between objects A and B as shown in FIG. A pressure is applied to the layer 32, and this pressure is applied to the gel-like material layer 32.
This is absorbed by the deformation of the cylinder 31 and the resistance force of the damper means 40.

Next, when vibration occurs on one side A of the object, this vibration is transmitted as a vibration wave to the upper mounting base 10 and applied to the gel-like material layer 32.

In this way, the vibration waves transmitted from the mount lO act as a force to compress or release the gel-like material layer 32, and when the gel-like material layer 32 is compressed, the mount lO descends to the position shown by the chain line. As a result, it bulges in the horizontal direction as shown by the chain line.

Since the deformation of the gel-like material layer 32 at this time is inelastic deformation and does not have repulsion resiliency, the repulsion is only due to the elastic deformation of the cylinder 31, or the repulsion is weak due to the repulsion of the cylinder and the damper means 40. Repulsion elasticity obtained by adding elasticity acts on vibration waves.

However, since the repulsive vibration waves generated by this repulsive elasticity act as energy to deform the gel material R32, they are dispersed and absorbed within the gel material layer 32 without directly affecting the mount 10.

<Effects of the Invention> As described above, the vibration absorber of the present invention attenuates vibration energy through the inelastic deformation of the gel material layer 32, and also transmits vibration energy within the gel material layer by the propagation characteristics of the gel material layer 32. Since it absorbs the waves by diffusing and differentiating them, it has the effect of quickly extinguishing the applied vibration waves without causing rebound resilience, and the damper means 40 also reduces the resistance of the gel-like material layer 32 to vibration energy. Since the force is increased, the absorption effect of the gel-like material layer 32 can be effectively maintained even against large vibration energy.

[Brief explanation of drawings]

1 to 3 are longitudinal sectional views showing an embodiment of the vibration absorber of the present invention. In the figure, 10.20 is a mounting base, 30 is a telescopic part, 31 is a cylindrical body,
32 is a gel-like material layer, and 40 is a damper means.

Claims (2)

[Claims] (1) A pair of mounts each connected to an object, a telescoping section interposed between the mounts, and damper means cooperating with the telescoping section, wherein the telescoping section is axially The damper means has an elastic cylinder whose both ends are respectively fixed to each of the pair of mounting bases, and a gel-like material layer with a penetration depth of about 50 to 200 filled and formed in the cylinder. The structure is such that when the pair of mounts approaches each other due to the pressure applied between the mounts, the structure operates to absorb the pressure, and the vibration wave absorption operation is performed by inelastic deformation of the gel-like material layer. A vibration absorber characterized in that it is configured to be assisted with low drag by the damper means. (2) The damper means is comprised of a cylinder portion provided on one of the pair of mounts, and a piston portion provided on the other of the pair of mounts so as to fit into the cylinder portion. The vibration absorber according to claim 1, characterized in that: