JPH04312235A - Method for filling fluid into vibration isolating device - Google Patents

Abstract

PURPOSE:To fill up fluid so that a diaphragm may hardly be loaded in a state being under a static load by preventing that the diaphragm swells out toward a cover at the time of attaching it to restrict its stroke during inputting a vibrational load. CONSTITUTION:A vibration isolating device has a process where pressure fluid is poured into an air chamber 6 through an opening 11 which is formed on a cover 5 and communicates with an open air to press a diaphragm 4 against a partitioning plate 3, and a process where a fixed quantity of the fluid L is filled up into a chamber R surrounded with a rubber elastic body 2 through a hole 10 which is formed on a main body 1 and communicates with the open air in the state of the diaphragm pressed against the partitioning plate 3. The fluid is filled up into the vibration isolating device composed of a process for sealing the hole 10 after filling up the fluid and a process for stopping the pouring in of the pressure fluid through the opening 11 after sealing the hole.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of filling a vibration isolator with a fluid, which is preferably used as an engine mount or a body mount of an automobile.

0002

2. Description of the Related Art A chamber surrounded by a rubber elastic body 2 of a main body part 1 is partitioned by a partition plate 3, and the outside of the partition plate 3 is covered with a diaphragm 4 to form two fluid chambers A and B that communicate with each other. A lid 5 that covers the diaphragm 4 on the outside of the diaphragm 4
Attach the lid 5 to create an air chamber 6, and create two fluid chambers A and B.
A vibration isolating device is known in which an incompressible fluid L is sealed in the vibration damping device (see FIG. 8). In order to seal the fluid L into the fluid chambers A and B of such a vibration isolator, the partition plate 3, diaphragm 4, and lid 5 are set in a caulking fitting 7 that is vulcanized and bonded to the rubber elastic body 2 of the main body 1. When sealing and fixing each of them, this is done by caulking the caulking fittings 7 in a tank filled with the fluid L.

0003

[Problems to be Solved by the Invention] When the vibration isolator assembled in the tank filled with fluid in this manner is installed, for example, between the engine 100 and the body 101 as shown in FIG. The rubber elastic body 2 is elastically deformed by the load of the engine 100, the volume of the fluid chamber A is reduced, the fluid L flows into the fluid chamber B through the throttle hole 8, and the diaphragm 4 is moved to the lid 5.
Expands to the side. In other words, regardless of the vibration load input,
The diaphragm 4 is always applied with some tension due to the expansion of the fluid chamber B due to the compression of the fluid chamber A due to the weight of the engine 100, etc., and is maintained in this state. Therefore, when a vibration load is input, the diaphragm 4 is elastically deformed within the air chamber 6,
This space that can be elastically deformed is limited to the volume within the lid 5. Since the diaphragm 4 has already expanded into the lid 5 under the static load, the space inside the lid 5 cannot be fully utilized, and the air chamber 6 may have to be enlarged.

[0004] Therefore, the present invention prevents the diaphragm from expanding toward the lid when a static load is applied, and as a result, the space inside the lid can be fully utilized, the stroke of the diaphragm can be increased, and the volume of the air chamber can be increased. It does not need to be made larger, and as a result, compared to a case where the diaphragm bulges toward the lid when subjected to a static load, if the diaphragm has an air chamber of the same volume, the stroke of the diaphragm can be made larger, improving vibration absorption performance. An object of the present invention is to provide a method for filling a fluid chamber with a fluid in order to manufacture a vibration isolator that can be used.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a step of injecting a pressure fluid into an air chamber through an opening formed in a lid and communicating with outside air to press a diaphragm into contact with a partition plate. , filling a predetermined amount of fluid into a chamber surrounded by a rubber elastic body from a hole formed in the main body and communicating with the outside air while the diaphragm is pressed against the partition plate;
The method consists of a step of sealing the hole after filling with fluid, and a step of stopping injection of pressurized fluid from the opening after the hole is sealed.

[0006]

[Operation] In the vibration isolating device filled with fluid according to the present invention, the diaphragm is in a state of being drawn toward the partition plate before being installed in an engine or the like. When such a vibration isolator is installed between the engine and the body, a static load from the engine, etc. is applied, which elastically deforms the rubber elastic body and contracts the fluid chamber, causing the diaphragm to is in a state where almost no load is applied to either the lid side or the partition plate side. Therefore, even if a vibration load is input in this state, the diaphragm can fully utilize the space within the lid, and as a result, the stroke of the diaphragm becomes larger, and the vibration absorption performance can be improved. Further, according to the method of the present invention, there is no need to prepare a tank filled with fluid as in the past, and the fluid can be sealed with a simple device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the main body 1 is constructed by vulcanizing and adhering a mounting fitting 9 and a caulking fitting 7 to a rubber elastic body 2, and forming a chamber R surrounded by the rubber elastic body 2. A hole 10 is formed in the mounting bracket 9 so that the chamber R communicates with the outside air. The partition plate 3, diaphragm 3, and lid 5 are assembled to the main body portion 1 configured in this manner. That is, the partition plate, diaphragm 3, and lid 5 are set at the location of the caulking metal fitting 7, and by caulking the caulking metal fitting 7, their peripheral edges are sealed and fixed to each other. Such assembly can be performed in the atmosphere rather than in a liquid tank, and almost no load is applied to the diaphragm 4 after assembly. The lid 5 has an opening 11 that communicates with the outside air.

After assembly as shown in FIG. 1, an injection pipe 12 is attached to the opening 11 of the lid 5, and pressurized fluid such as air is injected from the compressor C into the air chamber. When pressure fluid is injected into the air chamber 6, the diaphragm 4 is pressed against the partition plate 3 by the pressure of the pressure fluid.

As shown in FIG. 2, the pressure in the air chamber 6 is maintained to keep the diaphragm 4 in pressure contact with the partition plate 3, and a fluid such as an incompressible liquid is introduced into the hole 10 in the chamber R as shown in FIG.
Attach the filling tube 13 for injecting into the container. Next, Figure 4
As shown in the figure, a predetermined amount of fluid L is filled into the chamber R from this filling pipe 13. After filling the chamber R with the fluid L, the hole 10 is sealed with a pin 14. Thereafter, the injection of pressure fluid into the air chamber 6 is stopped, and the opening 11 is made to communicate with the outside air. When the fluid L is filled in the chamber R in this manner, the diaphragm 4 does not bulge into the air chamber 6 of the lid 5, and the partition plate 3
located on the side.

5 and 6 show a solenoid valve 15 in the filling pipe 13.
An embodiment is shown in which a vacuum pipe 16 and a fluid supply pipe 17 are switched between the vacuum pipe 16 and the fluid supply pipe 17. In FIG. 5, the air in the room R is sucked into a vacuum state, and the diaphragm 4 can be further drawn toward the partition plate 3 side. In this state, the pressure of the pressure fluid acting in the air chamber 6 may be kept low. In FIG. 6, the solenoid valve 15 switches the hole 10 and the fluid supply pipe 17 to communicate with each other, and the fluid supply pipe 1
7 shows a state in which a predetermined amount of fluid L is filled into the chamber R. Thereafter, the hole 10 is sealed in the same manner as shown in FIG.

As shown in FIG.
1, the rubber elastic body 2 is attached to the engine 1.
It is elastically deformed by a static load such as 00, and the fluid L flows into the fluid chamber B between the partition plate 3 and the diaphragm 4 through the throttle hole 8. In this state, the diaphragm 4 is in a state where almost no load is applied. When a vibration load is input from this state, the diaphragm 4 is elastically deformed within the air chamber 6 formed within the lid 5. Since the diaphragm 4 is not in a state of being bulged toward the lid 5 side, the space within the air chamber 6 is effectively utilized, the stroke of the diaphragm 4 is increased, and the vibration absorption performance is improved.

0012

As explained above, according to the present invention, the process of injecting pressurized fluid into the air chamber through the opening formed in the lid and communicating with outside air to press the diaphragm against the partition plate, and the process of pressurizing the diaphragm to the partition plate. A process of filling a predetermined amount of fluid into a chamber surrounded by a rubber elastic body from a hole formed in the main body part that communicates with the outside air while in pressure contact with the plate, a process of sealing this hole after filling the fluid, and a process of sealing the hole after the hole is sealed. Since it consists of the step of stopping the injection of pressure fluid from the opening, it is possible to reliably and easily fill the fluid with a small device. In a vibration isolating device filled with fluid in this way, it is possible to prevent the diaphragm from bulging toward the air chamber when a static load is applied, and as a result, the stroke of the diaphragm in the air chamber becomes large, which absorbs vibrations. Performance can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view after assembly before filling with fluid.

FIG. 2 is a sectional view when pressurized fluid is injected into the air chamber.

FIG. 3 is a sectional view showing a state in which fluid is being filled into the chamber.

FIG. 4 is a cross-sectional view with the hole sealed after the chamber is filled with fluid.

FIG. 5 is a sectional view showing a state in which air is removed from the room after filling with fluid.

FIG. 6 is a cross-sectional view of a vacuum chamber filled with fluid.

FIG. 7 is a sectional view of the vibration isolator filled with fluid in an installed state.

FIG. 8 is a sectional view showing a conventional example.

[Explanation of symbols]

1 Main body 2 Rubber elastic body 3 Partition plate 4 Diaphragm 5 Lid 6 Air chamber 10 holes 11 Opening R room L Fluid

Claims (1)

[Claims] Claim 1: A chamber surrounded by a rubber elastic body of a main body part is partitioned by a partition plate, and the outside of the partition plate is covered with a diaphragm to form two fluid chambers communicating with each other, and a lid covering the diaphragm is provided on the outside of the diaphragm. In the method of filling fluid into a vibration isolator with a lid installed to create an air chamber inside the lid, a step of injecting pressurized fluid into the air chamber from an opening formed in the lid that communicates with outside air to press the diaphragm against the partition plate; filling a predetermined amount of fluid into a chamber surrounded by a rubber elastic body from a hole formed in the main body that communicates with the outside air while the diaphragm is pressed against the partition plate, and sealing the hole after filling with the fluid; A method for filling a vibration isolator with fluid, comprising: stopping the injection of pressure fluid from the opening after the hole is sealed.