JPS6199736A - Vibration-proof device for compressor - Google Patents

Abstract

PURPOSE:To improve the sealing characteristic between a fixed table and vibration-proof rubber by closely attaching the vibration-proof rubber to the fixed table with a hollow portion provided at the lower end of the vibration- proof rubber. CONSTITUTION:The hollow inner face of the lower end 6a of vibration-proof rubber 6 is formed in the same shape as the outer circumference at the lower end of a pin 3 and furthermore a hollow portion is provided thereunder so that the inner face is considerably apart from the pin 3. Also, the upper end 6d of the vibration-proof rubber 6 is formed in a tapered conical shape. Thereby, the contact area is reduced and the contact pressure increases, therefore the sealing characteristic can be improved. Also, because the thickness of the upper end portion 6d can be reduced thiner and it is easily transformed when is taken out from the mold, pull off of the upper end 6d can be prevented and attaching of the vibrator to a holding plate 4 can be also established easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a vibration isolating device that supports a vibrating body through hollow vibration isolating rubber.

[Background of the invention]

A conventional vibration isolator has the structure shown in FIG. 2 as described in Utility Model Publication No. 57-35720, in which the fixed base 2 is
If the anti-vibration rubber 1 is not flat without protrusions, it is difficult to install it vertically, and as a result, the contact area between the fixed base 2 and the anti-vibration rubber 1 decreases and becomes uneven, resulting in poor sealing performance. There was no consideration given to In other words, it was necessary to manufacture the fixing base 2 on a flat surface without any protrusions.

That is, there is also the problem that the shape is limited.

In addition, the shape of the outer periphery 1a of the upper end of the anti-vibration rubber l is thick and cylindrical, so it has strong elasticity, and when removed from the molding plate, it cannot be deformed sufficiently and may be torn off. No consideration was given to these issues. On the other hand, due to the above-mentioned content, there was also the problem that the workability of attaching the vibration isolating rubber 3 to the support plate 4 of the vibrating body was poor.

[Purpose of the invention]

The present invention improves the above-mentioned problems such as the mounting structure, deterioration of sealing performance, and formability, and allows the vibration of the vibrating body to be improved without being influenced by the shape of the mounting part of the fixed foot platform 2. The object of the present invention is to provide a vibration isolating device that can sufficiently absorb vibrations.

[Summary of the invention]

In conventional vibration isolators, the contact area between the vibration isolating rubber 1 and the fixed base 2 is large, so there are restrictions on the shape of the fixed base 2 at the contact part, and the sealing performance between the fixed base 2 and the vibration isolating rubber 1 is limited. However, by providing a hollow part along with the part where the lower end of the vibration isolating rubber l is fixed close to the pin 3, the contact part with the fixing base 2 is placed on the outer periphery to improve the close contact with the fixing base 2. At the same time,
This is intended to enlarge the shape of the fixed base 2.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. In the figure, the same reference numerals as those in the conventional column indicate the same or equivalent parts. Reference numeral 6 denotes a vibration isolating rubber whose hollow inner surface 1' of the lower end portion 6a has the same shape as the lower outer periphery of the pin 3, and furthermore, a hollow portion is provided in the lower portion of the rubber and is angled so as to be separated from the pin 3 by a large distance. The upper end 6c of the vibration isolating rubber 6 has a conical shape with an angle as shown in the figure.

According to this embodiment, the contact portion 6c between the vibration isolating rubber 6 and the fixed base 2
However, by making the lower end hollow, the contact area becomes smaller, the contact pressure increases, and the contact becomes more intimate.
Improves sealing performance. Furthermore, in order to connect the fixing metal 2 and the pin 3, a protrusion is formed on the fixing base 2 by attaching a welding nut, a driving nut, etc. 7 to the fixing base 2, but this protrusion cannot escape through the hollow part. Fixed base 2
is no longer subject to any shape constraints.

Furthermore, since the upper end 6d of the anti-vibration rubber 6 can be made thinner and more easily deformed when removed from the mold, the upper end 6d will not be torn off, and it will be easier to apply vibrations. The body can also be easily attached to the support plate 4.

This has the effects described above.

〔Effect of the invention〕

According to the present invention, by providing a hollow portion at the lower end of the vibration isolating rubber 6 as shown in the figure, the vibration isolating member 2 can be attached to the fixed base 2 regardless of the presence or absence of a protrusion around the joint between the fixed base 2 and the pin 3. Since the rubber 6 can be brought into close contact, it has excellent sealing properties and is effective in preventing leakage of water, etc. on the fixing base 2.

Furthermore, by making the shape and corner ridges of the upper end portion 6d as small as possible, it is effective to improve moldability and furthermore, to improve assembly workability.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a vibration isolator according to the present invention, and FIG. 2 is a longitudinal sectional view of a conventional vibration isolator. 2... Fixing base, 3... Pin, 4... Support plate (vibrator), 5... Washer, 7... Driving nut, etc. V, 2 mouth'j11 old

Claims (1)

[Claims] 1. A pin (3
) and a hollow anti-vibration rubber (6) that passes through this pin (3).
A vibration isolator comprising: supporting a support plate (4) connected to a vibrating body on the upper outer periphery of the vibration isolator (6);
The lower end (6a) of the vibration isolating rubber (6) is connected to the pin (3).
A vibration isolating device characterized by having a hollow portion below the lower end portion (6a), which is adjacent to the lower end portion (6a) in a small area. 2. The vibration isolator according to claim 1, wherein the upper end (6c) of the vibration isolator (6) is obliquely angled and conical, has a large radius, and has a thin outer periphery.