JPS6330833Y2 - - Google Patents

Description

[Detailed Description of the Invention] The negative impact on the human body caused by the vibrations of hand-held power working machines such as chain saws has been raised as a major social problem, and various countermeasures have been taken. As one of the countermeasures against this problem, a vibration isolating member is interposed between the work part which is a source of vibration or the grip part which serves as a power source part.

Generally used as this vibration isolating member is a cylindrical rubber column with mounting fittings fixed to both ends, but in order to improve its vibration absorbing properties, the rubber must be soft. If the rubber is made softer, the mechanical strength required for the joining member will be reduced, and it is quite difficult to achieve both of these requirements. It is also known that filling air or oil improves vibration absorption performance, especially at low frequencies.

Therefore, in the present invention, the rubber is made of a relatively thick hollow rubber, and the inner space is sealed with air, thereby giving the effect of an air spring. The object of the present invention is to provide a vibration isolating member that secures the joint area by providing a flange on the part, prevents inappropriate twisting when subjected to excessive deformation, and can be easily installed even in narrow spaces. .

The present invention will be described in detail below based on embodiments shown in the figures.

Metal base plates 5, 7 and mounting fittings 6, 8 are integrally fixed to the bottoms of two bowl-shaped elastic members 1, 2 made of relatively thick rubber or the like. In this example, in order to facilitate installation into narrow areas,
One of the mounting fittings 6 is a bolt and the other 8 is a nut to shorten the overall length.

The outer peripheries 9, 10 of the elastic members 1, 2 are tapered toward the openings 3, 4 of the members 1, 2, and the opening edges are connected to the bottoms of the elastic members 1, 2. Flange portions 11 and 12 having approximately the same diameter are provided.
The two elastic members 1 and 2 as described above are attached to the flange 1.
1 and 12 facing each other and bonded with sufficient strength over their entire circumference using an appropriate adhesive, etc., and connected together, a vibration isolating member having a sealed inner cavity is formed. .

In this embodiment, since one of the mounting fittings 8 is a nut, a through hole 13 is provided at the bottom of the elastic member 2 in order to secure the tightening allowance for the bolt screwed into the nut. By applying the material, it is possible to seal the inner cavity from air, etc. If the mounting fitting 8 is replaced with a bolt or the like, the through hole 13 will of course become unnecessary.

In addition, the positions, shapes, and areas of the flanges 11 and 12, the degree of diameter reduction of the outer circumferences 9 and 10, the elastic members 1,
It goes without saying that the wall thickness of No. 2, the type of mounting fittings, the substance sealed in the inner cavity, etc. can be arbitrarily selected depending on the purpose of use of the vibration isolating member according to the present invention.

As described above, the vibration isolating member according to the present invention has an elastic member divided into two parts, so it is possible to easily provide an inner cavity filled with any substance, and it is possible to obtain the desired vibration absorption performance while maintaining strength. In addition, since the flange is provided in the middle part with approximately the same diameter as the bottom part, a sufficient bonding area can be obtained even if the diameter of the opening side is reduced, and the strength of the vibration isolating member as a whole can be increased, allowing it to be used in narrow areas. It can also be easily incorporated into. Furthermore, the deformation force in the shearing direction applied to the vibration isolating member is dispersed and received by the reduced diameter portions on both sides of the flange, and the flange also serves as a stopper in relation to the mating member, preventing excessive deformation. It is less likely to cause inappropriate twisting even when subjected to damage, and its durability is also improved.

As described above, according to the present invention, it is possible to provide a vibration isolating member that is excellent in vibration absorption performance, durability, and ease of handling.

[Brief explanation of drawings]

The figure is a sectional view of the vibration isolating member according to the embodiment of the present invention. 1, 2...Elastic member, 3, 4...Opening, 6,
8...Mounting bracket, 9, 10...Outer circumference, 11,
12...Tsubabe.

Claims (1)

[Scope of utility model registration request] The outer circumferences 9, 10 of the two bowl-shaped elastic members 1, 2 to which the mounting fittings 6, 8 are fixed to the bottoms are reduced in diameter toward the openings 3, 4, and the openings 3, 4 are reduced in diameter.
Flanges 11 and 12 having approximately the same diameter as the bottoms of the elastic members 1 and 2 are provided at the edges of the elastic members 1 and 2, and the flanges 11 and 12 are opposed to each other and are sealed and joined over their entire circumferences, thereby making the two elastic members A vibration isolation member formed by integrally connecting members 1 and 2.