JP2566677Y2 - Anti-vibration rubber - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is applied between members,
The present invention relates to an anti-vibration rubber for preventing a vibration generated in one member from being transmitted to another member.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a pair of washer plates 2,
3, a spring member 1 made of a rubber material, which mainly absorbs and attenuates vibrations, is integrally vulcanized. One washer plate 2 has a spring member 1 on its inner diameter side.
It is formed thick toward the side, and a female screw 4 is formed at the center of the thick portion 2a. The other washer plate 3 has a simple disk shape, and has a bolt 5 protruding at the center thereof. The female screw 4 is a thick part 2 of the washer plate 2.
a, which is formed at an appropriate depth from the outer side surface, that is, in order to prevent a part of the rubber material from turning into the female screw 4 during vulcanization molding of the spring member 1 made of rubber material. And non-penetrating.

[0003] The vibration isolating rubber comprises a female screw 4 and a bolt 5.
And a screw means (not shown) that is screwed into the spring member 1 to interpose between the opposing members that are separated from each other and that the vibration generated in one member is transmitted to the other member. Is to prevent it.

[0004]

However, according to the above-mentioned conventional structure, since the female screw 4 is not penetrated, threading must be performed by cutting in order to form the female screw 4, and the processing cost is reduced. There was a problem of getting higher. The inner end of the non-penetrating female screw 4 has no thread groove 4.
Due to the existence of b, the effective screw portion 3a that can be actually screwed with the mating member side could not be lengthened.

The present invention has been made in view of the above-described problems, and has as its object to facilitate manufacture and reduce costs, and to improve the coupling force of a female screw.

[0006]

According to the present invention, a rubber spring member is integrally vulcanized between a pair of washer plates and connected to at least one of the washer plates. In the anti-vibration rubber provided with the female screw of
The female screw is formed through the washer plate in the thickness direction,
The opening on the spring member side of the female screw is closed by a lid fixed to the washer plate.

[0007]

According to the above construction, since the female screw penetrates the washer plate in the thickness direction, the processing can be automated by header processing, and the female screw does not have a portion having no screw groove. Therefore, the bonding strength can be improved. The lid prevents a part of the rubber material from going around the female screw during the vulcanization molding of the spring member made of the rubber material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an anti-vibration rubber according to the present invention will be described with reference to the illustrated embodiment. In each embodiment, the same or corresponding parts as those in the conventional example of FIG.

First, FIG. 1 shows a first embodiment of the present invention, in which one washer plate 2 is formed thick so as to face a portion except an outer peripheral edge thereof toward a spring member 1 side. A female screw 4 is formed through the center of the thick portion 22 in the thickness direction. Reference numeral 6 denotes a cap-shaped lid.
3 and is closed so as to cover the opening 41 of the female screw 4 on the spring member 1 side.

According to this embodiment, since the female screw 4 penetrates through the thick portion 22 of the washer plate 2 in the thickness direction, the entire length of the female screw 4 is an effective screw portion. Since the process can be easily performed by the header processing, the process can be automated.

An opening 4 on the spring member 1 side of the female screw 4
The lid 6 that closes the rubber material 1 is used to integrally vulcanize the spring member 1 made of rubber material between the pair of washer plates 2 and 3 in the manufacture of the vibration isolating rubber. This prevents the part from turning into the female screw 4. A space S communicating with the female screw 4 is formed between the cap 6 and the washer plate 2 in the form of a cap.
The screw means on the mating member side to be screwed with the female screw 4 can be screwed into the space S until it reaches the inside of the space S, so that the coupling force with the mating member can be improved.

FIG. 2 shows a second embodiment of the present invention. The lid 6 is provided so as to completely cover the thick portion 22 of the washer plate 2, and the protruding edge of the lid 6 is It is welded to the thin portion 21 of the washer plate 2. For this reason, the thick portion 22 of the washer plate 2 can be formed thicker than in the first embodiment, and the length of the female screw 4 can be increased. The configuration of other parts is substantially the same as that of the first embodiment.

The present invention is not limited to the illustrated embodiment. For example, the lid 6 may be fixed by brazing instead of welding, or may be fixed by airtightly press-fitting a step surface 24 between the thin portion 21 and the thick portion 22 of the washer plate 2. The shape of the details and the like can be variously changed.

[0014]

According to the anti-vibration rubber of the present invention, since the female screw penetrates the washer plate in the thickness direction, the female screw processing by the header processing can be automated, and the manufacturing cost can be reduced. Further, since the female screw does not have a portion having no thread groove and can be completely screwed with the screw means on the mating member side, an excellent effect of improving the coupling force with the mating member is achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing an example of a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spring member 2, 3 Washer plate 4 Female screw 5 Bolt 6 Lid 21 Thin part 22 Thick part 23 Opposing surface 24 Step surface 41 Opening 61 Projecting edge S Space

Claims (1)

(57) [Scope of request for utility model registration] An anti-vibration device in which a rubber spring member is integrally vulcanized between a pair of washer plates and at least one washer plate is provided with a female screw for connection. In the rubber, the female screw 4 is formed through the washer plate 2 in the thickness direction.
Side opening 41 is provided with lid 6 fixed to washer plate 2.
An anti-vibration rubber characterized by being closed by a.