JPS5824659Y2 - gas spring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas spring device, and more particularly to a gas spring device suitable for supplying gas to a gas spring type damper.

Generally, in a hydraulic shock absorber for a motorcycle's front fork or rear cushion unit, a piston rod is slidably inserted into the cylinder via a piston, and this piston divides two upper and lower liquid chambers, with one liquid chamber being An air or other gas chamber is defined above or below, either directly or via a free piston.

However, when filling the gas chamber with a gas such as air or gas, the gas is normally supplied from a gas filling device via a filling valve.

However, if the gas in the gas chamber leaks while using a gas spring type damper and the necessary spring load cannot be obtained, it is necessary to replenish air etc. from a gas filling device such as an air pump each time. These air pumps and the like are not installed in any location, and cannot supply air when needed, especially in an emergency.

Therefore, it would be a good idea to carry this gas enclosing device with you, but the current situation is that there is no gas enclosing device that is suitable for carrying.

Therefore, an object of the present invention is to provide a gas spring device that can optionally fill in a specified amount of gas even if the gas in the gas chamber of the cushion unit leaks.

An example of implementing the present invention will be described below with reference to a box.

There are two first . Second tank chambers 3 and 4 are divided, and gas such as air is sealed in the second tank chambers 3 and 4.

A passage 5 connecting the two tank chambers 3 and 4 is bored in the wall 2, and a stop valve 6 is screwed into this passage so as to open and close the passage freely.An air valve 7 is mounted on the top of the stop valve 6. The internal pressure of the tank chambers 3 and 4 can be checked.

A free piston 8 is slidably inserted into the second tank chamber 4 via a seal 9, and this free piston 8 defines a gas chamber 10 on the opposite side from the tank chamber 4.

A rod 11 is integrally connected to the center of the free piston 8.

The rod 11 and the free piston 8 are connected to the atmosphere and the tank chamber 4.
and the gas chamber 10 by drilling passages 12 and 13,
A check valve 14 is provided at the inner end of the free piston 8 to open and close the end of the passage 12.

The first tank chamber 3 has one or two ports (15a)
, 15b are provided, and one or two cushion units N7 are connected to these ports 15a, 15b.

In the illustrated embodiment, the oil chamber 15a is connected to an oil chamber of an air cushion unit 17 via a hose 16, and the oil 18 in this oil chamber is filled to the lower part of the tank chamber 3 via the hose 16.

The method of connecting the tank device and the cushion unit is not limited to the above method, but as described above, the tank chambers 3 and 4 are integrally configured in the case 1 and the cushion unit 17 and the hose 16 are connected. a method of connecting the tank chamber 3 and the cushion unit 17, and a method of connecting the other tank chamber 4 to the tank chamber 3 via a hose;
A method of integrating the tank case 1 with the air cushion unit 17 is possible.

Furthermore, it is possible to connect one cushion unit 1T to the tank chamber 3, or to connect two cushion units 17 to the two ports 15a and 15b.

The cushion unit 17 can also be used as a front fork, rear cushion unit, or other similar pneumatic spring damper for a motorcycle.

Next, we will discuss the operation.

In the figure, the air chamber of the cushion unit 17, that is,
If the air in the first tank chamber 3 leaks and the spring load falls below a predetermined level, first, the free piston 8
When the check valve 14 is operated to the left in the drawing, the tank chamber 4 becomes negative pressure, and the check valve 14 is pushed open from the passage 12, and gas in the atmosphere is sucked into the tank chamber 4.

Thereafter, by loosening the stop valve 6 and opening the passage 5, the tank chambers 3 and 4 are communicated with each other, and the free piston 8
The passage 5 is closed with the stop valve 6 while being pressed to the right in the drawing.

When the free piston 8 is operated to the left by the above operation, the amount of gas sucked into the tank chamber 4 is supplied to the tank chamber 3, and the gas spring reaction force of the tank chamber 3 can be increased.

At this time, the internal pressure of the tank chamber 3°4 is checked with the air valve 7, and when the specified sealing pressure is reached, compression by the free piston 8 is stopped and the stop valve 6 is closed. It will be filled with the desired internal pressure.

Furthermore, if the pressure in the tank chamber 3 drops significantly and the desired spring reaction force cannot be obtained by operating the free piston 8 only once, the necessary spring reaction force can be obtained by repeating the above operation many times. It's not even the first thing that happens.

In the above-described embodiment, the rod 11 and the case 1 are configured to simply protrude and retract, but by screwing them together, the rod 1
If the piston 8 is moved while rotating the piston 1, the reaction force of the piston 8 is mechanically maintained when the piston 8 is moved to the right and the stop valve 6 is closed with the tank chamber 3 pressurized. It is easy to do the work.

Furthermore, it is no longer the case that a similar mechanism could be constructed using cam means or the like.

The feature of this invention is that the air tank of the cushion unit is divided into two parts, one of which is used as a tank chamber for producing gas spring characteristics, and the other air chamber communicated through a stop valve is compressed to achieve a specified seal. It is a gas spring device designed to obtain pressure.

Therefore, as a result, the specified sealing pressure can be obtained at any location even if you do not carry an air pump, and if the capacity of one air tank chamber 4 is sufficient, it is possible to secure the sealing pressure from atmospheric pressure. be.

■-The method of directly compressing air tanks changes the internal pressure VO of the air chamber, so the spring characteristics change too much.
In particular, it cannot be applied to items with large load changes such as motorcycle rear cushion units, but because the two air chambers are divided, the internal volume Vo of the air chamber to produce air spring characteristics is independent of the sealing pressure. It is something that can always be obtained consistently.

[Brief explanation of drawings]

The accompanying drawing is a longitudinal sectional side view of an air tank device according to an example of implementation of the present invention. 2... Wall, 3, 4... Tank room, 5... Passage,
6... Strafharz, I... Air pulp, 8.
...Piston, 16...Hose 17...Cushion unit.

Claims (1)

[Scope of claims for utility model registration] (1) Two first claims. A second tank chamber is provided, the first tank chamber is connected to the cushion unit and communicates with the second tank chamber via a passage that can be opened and closed, and a piston is slidably inserted into the second tank chamber. , a gas spring device in which gas pressure is supplied to the first tank chamber as the piston slides. (2) Inside the case, two first and second
The gas spring device according to claim 1, which is a registered utility model, wherein a tank chamber is divided, a passage is bored in the wall, and the passage is opened and closed by a stop valve provided with an air valve. (3) The first tank chamber is connected to one or two cushion units.Claim No. 1 (1)
) The gas spring device described in section 2. (The gas spring device according to claim 1), in which the 47il tank chamber is provided integrally with the cushion unit, and the second tank chamber is connected to the first tank chamber via a hose. ( 5) The gas spring device according to claim (1) of the utility model registration, in which the tank case and the cushion unit are integrally formed. (6) The first tank chamber is connected to the cushion unit via a hose. Scope of claim for utility model registration (
1) The gas spring device described in item 1).