JPS5926815B2 - Piston type gas cylinder and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston-type gas cylinder and a method for manufacturing the same, and more specifically, the present invention relates to a piston-type gas cylinder and a method for manufacturing the same, and more particularly, the present invention is a piston-type gas cylinder that has an excellent ability to support mechanical devices that are vibration sources and isolate vibrations, and is compact and easy to manufacture. The present invention relates to a piston-type gas cylinder and its manufacturing method.

For example, as a means of supporting a mechanical device that emits relatively high-frequency vibrations, such as a support device for an automobile engine, and insulating the vibration from being transmitted to the support, a compressed gas is built in and the vibration direction is Means that allow the container to be expanded and contracted are generally known, but this type of container requires a large container size in order to ensure vibration absorption by filling a large amount of gas. However, it also has drawbacks such as difficulty in filling compressed gas during manufacturing.

In order to solve the above-mentioned drawbacks of the prior art, the present invention has the following features:
In a combination of a cylinder and a piston, the piston head and rod constituting the piston are made hollow, and the hollow part is communicated with a gas chamber sandwiched between the cylinder top wall and the piston head, thereby increasing the capacity of the working gas body. and, in the structure before assembly, close the opening on the piston side of the piston hollow part with a lid having a thin membrane part in the center that can be penetrated by a sharp protrusion. prior to assembly, high-pressure compressed gas is sealed in the closed cavity, a sharp projection is provided on the top wall of the cylinder facing the membrane part, and highly compressed working gas is sealed in the hollow part. After inserting the piston into the cylinder and completing the attachment of the sealing device to the circumferential surface of the piston rod at the open end of the cylinder, push the piston until it reaches the stroke end until the membrane of the lid is ruptured by the protrusion on the top wall. The inner cavity of the cylinder and the hollow part of the piston are filled with the sealed gas, so that the gas cylinder device can function as a gas cylinder device.

Embodiments of the present invention will be described below based on the drawings.

In the embodiment shown in FIG. 1, a piston head 21 and a piston head 21 are placed in a cylinder 10 whose one end is closed by a top wall 11 having a projection 12 with a sharp tip at approximately the center. A piston 10 having a concentrically integrated and axially extending piston rod 22 is slidably inserted in the axial direction to open the inner cylinder cavity into the first cavity 13 and the second cavity 14. I understand.

An annular backing 16 is inserted into the open end of the cylinder 10 so as to be penetrated by the piston rod 22 and slide sealingly on the piston rod peripheral surface, with its outer periphery sealed against the cylinder inner peripheral surface, and is fixed to the cylinder 10. cylinder cover 1
7 supports the annular backing 16.

A first cushion 18 for damping the five strokes of the piston 100 toward the top wall 11 is mounted in contact with the top wall 11, damping the stroke of the piston 10 in the opposite direction, and cooperating with the annular backing 16, Second vacant room 14
A second annular cushion 19 is attached to the inner wall of the cylinder and forms a separate third cavity 15, which is filled with lubricating oil.

The piston head 21 is provided with a communication hole 23 that communicates the first cavity 13 and the second cavity 14, and the passage hole 23 passes through the piston head 21 and the piston rod 22 and closes at the end opposite to the piston head. vacant room 2
4 is provided, and the head side opening of the cavity is closed by a lid 25, and the portion of the lid 25 facing the top wall side protrusion 12 closes with the protrusion 1 when the piston 10 is pressed toward the top wall side.
It is constituted by a thin-walled rupture membrane portion 26 which is broken through by 2.

The outer end of the cylinder 10 and the end of the piston rod 22 are provided with means for coupling to a mechanical device to be supported and a support, respectively.

The cylinder and piston of the present invention constructed as described above are assembled as follows.

Compressed gas is injected into the internal piston cavity 24 sealed by the lid 25 through an appropriately provided inlet, the inlet is closed, the compressed gas sealing piston 20 is inserted into the cylinder 10, and then the second After the cushion 19 and its locking means are installed, the annular backing 16 and the cylinder cover 17 are installed and fixed, and the third cavity 15 is filled with lubricating oil, the piston 10 is moved toward the top wall 11. By pressing, the breakable membrane part 26 of the lid is broken by the protrusion 12 as shown by the dotted line in the figure, and the sealed gas in the piston internal space 24 is communicated with the first cavity 13 through the communication hole 23. and the second cavity 14 is also filled to form a piston type gas cylinder.

The rupture of the rupture film portion 26 by the protrusion 12 occurs when the cylinder 10 is joined to one of the supported machine and the abutment, and after the piston 20 is joined to the other of the supported machine and the abutment, the supported machine and the abutment are joined. It is also possible to complete them by bringing them close to each other.

The pressure of the gas sealed in the sealed internal piston cavity 24 is equal to the weight of the mechanical device to be supported and The pressure is set so that it can withstand vibration.

Since the piston-type gas cylinder and the method for manufacturing the same according to the present invention have the above-mentioned constituent features, the following effects are brought about.

Since the piston part is hollow, the volume for accommodating the working gas increases without increasing the dimensions, especially the axial length, and the ability to insulate vibrations is ensured. The working gas is filled in the inner space of the piston, and the assembly of the cylinder, piston, and other parts can be completed while the working gas is sealed, making the work simpler and easier than with conventional techniques in which gas is filled after assembly is completed. By restraining the top wall 11 and the piston head 21 from coming close to each other during storage and handling, keeping the breakable membrane portion 26 in a closed state, and causing it to break when combined with the machine to be supported. It is possible to prevent depressurization of the sealed gas during storage, handling, etc.

In addition, in the embodiment, the cylinder inner protrusion 12 is located on the top wall 1.
1, but it is also possible to construct it separately from the top wall 11 and attach it to the inner surface of the top wall 11 in combination with the first cushion 18.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the structure of a piston type gas cylinder of the present invention. 10...Cylinder, 11...Top wall, 1
2... Protrusion, 13... First vacant room, 1
4...Second vacancy, 15...Third vacancy, 16...Ring-shaped, 17...
...Cylinder cover, 18...First cushion, 19...Second cushion, 20...
... Piston, 21 ... Piston head, 22
... Piston rod, 23 ... Communication hole, 24 ... Piston interior space, 25 ...
Lid, 26... Broken membrane part.

Claims (1)

Claims: 1. A cylinder 10 whose one end is closed by a top wall 11 and whose other end has an opening; a cylinder 10 that is fitted in the cylinder 10 so as to be slidable in the axial direction, thereby opening up an internal cavity of the cylinder 10; Piston head 21 divided into a first cavity 13 and a second cavity 14
and a piston rod 22 extending from the piston head 21, and the piston rod 2.
2, the annular backing 16 is attached to the open end of the cylinder 10 and slides sealingly on the circumferential surface of the piston 1220.
A protrusion 12 facing the piston 20 is attached to the top wall 11, and the piston 20 connects the top wall 11 and a communication port 23 that allows the first cavity 13 and the second cavity 14 to communicate with each other. It has a cavity 24 that opens toward the end of the piston head and is closed at the end of the piston head, and has the first cavity 13 and the piston interior cavity 24 on the opening side of the piston interior cavity 24. isolated and said cylinder top wall 11
A lid 25 having a breakable membrane part 26 that is broken by the protrusion 12 is attached to a position facing the protrusion 12 , and when the breakable membrane part 26 is broken by the protrusion 13 , the inner space 24 of the piston is closed in advance. A piston-type gas cylinder characterized in that compressed gas sealed therein fills the first cavity 13, the second cavity 14, and the piston interior cavity 24. 2. The piston 20 is provided with a piston head 21 having a communication hole 23 and a piston rod 22 extending in the axial direction from the piston head 21. After filling the pressure gas into the piston internal cavity 24 whose opening side is closed, the internal cavity is closed at one end by the top wall 11 and opened at the other end, and the broken membrane is attached to the inner surface of the top wall 11. Cylinder 1 having protrusion 13 facing portion 26
0, the piston 20 and the piston lon 1220
Attaching an annular backing 16 that sealsly slides on the surrounding surface,
A first cavity 13 and a second cavity 14 are formed on both sides of the piston head 21, and then the piston 20 and the top wall 11 are brought close to each other, and the protrusion 12 causes the rupture membrane part 26 to be formed. rupture, and the piston inner cavity 2
4, the first cavity 13, the second cavity 14, and the piston internal cavity 24 are filled with the pressure gas sealed in the piston-type gas cylinder.