JPH0126411B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fluid-filled mount comprising two stages of elastic members arranged in series.

A mounting member connected to the vibration source and a base member on which the vibration source is mounted are coupled by an umbrella-like elastic member to form a fluid chamber therein, and the fluid chamber is further communicated with the diaphragm chamber via an orifice. A fluid-filled mount is known, which damps vibrations during low-frequency large strokes, but tends to have a high dynamic spring constant during high-frequency small strokes.

Therefore, a fluid-filled mount has already been proposed in which a cylindrical elastic member is stacked on top of an umbrella-shaped elastic member with a metal intermediate member interposed in the upper center thereof, and the mounting member is coupled to the upper surface of the cylindrical elastic member. , has been put into practical use. That is, the dynamic spring constant is lowered by the two stages of elastic members in series, and minute vibrations can be absorbed by the upper cylindrical elastic member, thereby improving vibration isolation performance during high frequency and small strokes.

By the way, when such two stages of elastic members in series are obtained by vulcanization molding, processing efficiency is poor if each is molded separately, and traces of the rubber injection ends that are cut off after molding remain on the peripheral wall of each elastic member that behaves as it expands and contracts. However, due to the repeated expansion and contraction behavior, stress is concentrated at the rubber material injection end mark and cracks occur, resulting in poor durability.

In view of the above-mentioned disadvantages, the present invention has been made to solve these problems all at once, and its purpose is to:
In addition to molding two series of elastic members with one set of molds to improve processing efficiency, we have also devised the rubber injection part so that there are no traces of the rubber injection end on the peripheral walls of both elastic members when separated after molding. To provide a fluid-filled mount intended to improve durability by eliminating residue.

In order to achieve such an object, the present invention provides a fluid-filled mount in which elastic members are arranged in two stages in series, in which a through hole is formed in the center of an intermediate member interposed between the two stages of elastic members, The gist is that both elastic members are integrally formed by injecting and filling a rubber material into the mold from the fluid chamber side near the through hole.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a central vertical sectional view of a fluid-filled mount according to the present invention, FIG. 2 is a half-cut plan view thereof, and FIG.

First, the base member 2 consists of a cylindrical body 5 in the shape of a truncated inverted cone, with a flange portion 3 formed all around the upper part and an annular clamping part 4 with a U-shaped cross section opened inward at the lower part. , mounting screw holes 6, 6 for mounting to the fixing member are formed in the flange portion 3 facing each other, and the peripheral edge of the flange portion 3 is bulged upward with these screw holes 6, 6 as a boundary, and opposing ribs 7, 7 is formed.

Further, a mounting screw 9 for attaching to the vibration source is provided in the center of the thin and small disk-shaped mounting member 8.

Further, the intermediate member 11 disposed between the base member 2 and the mounting member 8 has a thick plate shape,
A through hole 12 extending vertically is formed in the center thereof.

Then, the base member 2, the intermediate member 8, and the mounting member 11 are placed in order from below in a modeling mold (not shown) at appropriate intervals, and the rubber The material is injected, vulcanized, and filled into the mold.

As a result, the rubber material passes through the through hole 12 to form a cylindrical elastic member 13 between the intermediate member 11 and the mounting member 8, and a thick umbrella-like elastic member between the intermediate member 11 and the cylindrical body 5 of the base member 2. member 14 is formed at the same time, and further this umbrella-like elastic member 14
An annular stopper 15 is formed hanging from the ceiling.

In this way, the elastic members 1 are configured in two stages in series, vertically.
3 and 14 are released from the mold, and the rubber material injection end is cut off at the central recess 16 of the annular stopper 15.

Thereafter, the circumferential edges of the orifice plate 21, the diaphragm 24 whose circumferential edges are held by the holder ring 25, and the bowl-shaped cover plate 27 are inserted into the U-shape of the annular holding part 4 of the base member 2 in order from above,
Connect by caulking.

An elastic rubber plate 22 is superimposed on the upper center surface of the orifice plate 21, and the orifice 2 is placed in the center of the elastic rubber plate 22.
3 is formed through the cover plate 27.
An air vent hole 28 is provided in the.

The fluid chamber 17 within the umbrella-like elastic member 14 of the fluid-filled mount 1 configured as described above communicates with the diaphragm chamber 26 via the orifice 23, and both chambers 17 and 26 are filled with liquid and sealed. .

According to the present invention, the rubber material is injected from the fluid chamber 17 side of the through hole 12 formed in the center of the intermediate member 11 to integrally form two series of elastic members 13 and 14, thereby improving processing efficiency. can,
In particular, since the rubber injected portion is located directly below the intermediate member 11, which is a part that has little elasticity and does not perform vibration absorption, cracks are likely to occur on the peripheral walls of both elastic members 13 and 14, where cracks are likely to occur. There are no marks at all, so it is possible to improve the durability of these two series elastic members 13 and 14, and this type of fluid-filled structure has an excellent vibration isolation function during high frequency and small strokes. The life of the mount 1 can be extended.

As described above, the present invention has excellent advantages such as being able to extend the life of a fluid-filled mount formed by two stages of elastic members in series.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view of the fluid-filled mount, and FIG. 2 is a half-sectional plan view of the same. In the drawings, 1 is a fluid-filled mount, 2 is a base member, 8 is a mounting member, 11 is an intermediate member, 12 is a through hole thereof, 13 is a cylindrical elastic member, 14 is an umbrella-shaped elastic member, 17 is a fluid chamber, 23 is the orifice,
26 is a diaphragm chamber.

Claims (1)

[Claims] 1 A mounting member connected to a vibration source and a base member on which the vibration source is mounted are connected by two stages of elastic members in series with an intermediate member interposed, one of the elastic members is formed into an umbrella shape, and a fluid is inserted inside. In a fluid-filled mount that forms a chamber and communicates the fluid chamber with a diaphragm chamber via an orifice, a through hole is formed in the center of the intermediate member, and rubber is inserted from the fluid chamber side near the through hole. A method for manufacturing a fluid-filled mount, characterized in that the two series elastic members are integrally formed by injecting a material into a mold.