JPH0662276U - Gas charging valve - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the reliability in terms of durability when tire valves are used for accumulators and the like. [Constitution] The gas sealing valve 25 is a check valve 27 as a first valve for receiving high pressure gas in a valve case 26.
A tire valve 28 as a second valve was built in series behind the check valve 27.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gas filling valve for filling a high pressure gas filled in a shock absorber, an accumulator or the like, and more particularly to a gas filling valve for filling a high pressure gas having a large pressure fluctuation.

[0002]

[Prior art]

 Conventionally, as a gas filling valve that fills high-pressure gas filled in shock absorbers, accumulators, etc., a tire valve that allows air to flow in and out by pushing the tip of a pin in order to simply fill the gas. Is often used. Further, there is a valve structure for an accumulator disclosed in Japanese Utility Model Laid-Open No. 56-93502, which does not use a tire valve. In this prior example, a check valve for air supply is incorporated into a safety valve. I'm out.

[0003]

[Problems to be solved by the device]

 When a tire valve is used to fill the high-pressure gas as described above, in a shock absorber, accumulator, etc., the high-pressure gas inside has large pressure fluctuations, so a tire valve for ultra-high pressure must be used. If the tire valve for ultra-high pressure is not used, gas durability and oil leakage may occur due to lack of pressure durability.Also, even if a tire valve for ultra-high pressure is used, a shocking pressure fluctuation may occur. When it is repeated, oil leakage may occur. Also, in the valve structure disclosed in Japanese Utility Model Laid-Open No. 56-93502, since the relationship between the two valves is parallel, oil leakage or the like is likely to occur when pressure fluctuations are repeated.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a gas charging valve with a first valve for receiving high-pressure gas and a second valve arranged in series with the first valve.

[0005]

[Action]

 Since the high pressure gas is received by the first valve, a tire valve can be used as the second valve, and since pressure fluctuations are not directly input to the tire valve, the reliability in terms of oil and gas leakage is improved. improves.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a sectional view of a shock absorber to which the gas charging valve according to the present invention is applied. In this shock absorber, a damper cylinder 2 is erected in an outer tube 1 and an upper portion thereof is supported by a rod guide 3, and a hollow rod 4 is inserted from above into the damper cylinder 2 via a rod guide 3 to form a hollow rod. 4 Piston part 5 is provided at the tip part, and orifices 6 and 7 for generating damping force are formed in piston part 5, and check valves 8 and 9 for opening these orifices 6 and 7 at the time of compression or extension. Is provided.

A bottom piston 11 is fixed to the inner peripheral surface of the lower part of the damper cylinder 2, and orifices 12 and 13 for generating a bottom damping force are formed in the bottom piston 11, and these orifices 12 and 13 are formed. Check valves 14 and 15 are provided for opening during compression or extension.

On the other hand, on the upper end of the hollow rod 4, the nut 16 is fixed with the washer members 17, 18 and the mount rubber 19 sandwiched between these, and the mount base 20 is attached to the mount rubber 19 to mount the mount rubber 20. A suspension spring 22 is provided between the lower outer periphery of the base 20 and a spring seat 21 attached to the outer periphery of the outer tube 1.

Further, a gas sealing valve 25 for sealing the hollow hole 4 a in the hollow rod 4 communicating with the damper cylinder 2 is attached inside the upper end of the hollow rod 4. As shown in FIG. 2, the gas sealing valve 25 has a check valve 27 as a first valve built in a hollow valve case 26 on the hollow hole 4a side of the hollow rod 4, and the check valve 27 is provided on the downstream side. The tire valve 28 as a second valve is built in series.

In the check valve 27, a guide 31 for holding the check ball 30 is slidably fitted in the valve case 26, and a rear end of the check valve 27 is attached in a valve closing direction by a spring 33 locked by a stopper ring 32. It is a force. The tire valve 28, which is a standard product, is normally closed and is opened by pressing the pin 28a, and is automatically returned to the closed state by releasing the pressing force of the pin 28a.

A flow passage 34 communicating with the hollow portion is formed in the valve case 26, and a flow passage 35 for communicating the hollow hole 4 a with the flow passage 34 is formed at the upper end portion of the hollow rod 4 to connect the flow passage 34 to the check valve. Open and close at 27.

Since the high-pressure gas in the hollow rod 4 of the shock absorber is directly applied to the check valve 27 of the gas sealing valve 25 and does not reach the tire valve 28 because of the above-described configuration, pressure fluctuations occur in the tire valve 28. I don't care. In this way, gas leaks and oil leaks using a standard tire valve as the second valve are eliminated, and reliability in terms of durability is improved.

FIG. 3 is a sectional view of an accumulator to which the gas sealing valve according to the present invention is applied. A free piston 42 is slidably fitted in a case 41 of the accumulator to define two chambers 43 and 44, and a gas sealing valve 25 is fixed to the case 43 by welding to the case 41. . The chamber 44 side is connected to the outside via a connecting member 45.

Therefore, the pin 28 a of the tire valve 28 is pushed to the gas sealing valve 25 to open the high-pressure gas, and the high-pressure gas is sent to open the check valve 27. By closing the tire valve 28 when the gas is fed and the required gas pressure is reached, the high-pressure gas is applied to the check valve 27 and is not directly applied to the tire valve 28, so that gas leakage can be prevented.

By operating the tire valve 28 and the check valve 27, the internal gas pressure can be easily adjusted.

As shown in FIG. 4, a flange portion 26a is formed on the valve case 26 of the gas sealing valve 25, and the valve case 26 is screwed and attached to the case 41 of the accumulator. An O-ring 46 may be fitted between and fixed to 41.

[0017]

[Effect of device]

 As described above, according to the present invention, the gas injection valve is constituted by the first valve for receiving the high pressure gas and the second valve arranged in series with the first valve. Since tire valves can be used and pressure fluctuations are not directly input to the tire valves, reliability in terms of durability against oil and gas leaks is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a shock absorber to which a gas filling valve according to the present invention is applied.

FIG. 2 is an enlarged sectional view of the main part of the shock absorber.

FIG. 3 is a sectional view of an accumulator to which the gas charging valve according to the present invention is applied.

FIG. 4 is a partially cutaway sectional view of another embodiment of the accumulator.

[Explanation of symbols]

1 ... Outer tube, 2 ... Damper cylinder, 4 ... Hollow rod, 25 ... Gas sealing valve, 26 ... Valve case, 2
7 ... Check valve (first valve), 28 ... Tire valve (second valve).

Claims (2)

[Scope of utility model registration request] 1. A gas filling valve for filling a high pressure gas, wherein the gas filling valve receives the high pressure gas.
A gas charging valve comprising a valve and a second valve arranged in series with the first valve. 2. The gas charging valve according to claim 1, wherein the first valve is a check valve and the second valve is a tire valve.