JPH0231616Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pressurized reaction for motorcycles, and particularly to a pressurized reaction with an improved connection to high-pressure gas filling equipment.

(Prior Art) Conventionally, the high-pressure gas filling port in a pressurized reaction system for motorcycles is provided in the side wall of the cylinder, and is provided at the connection part that connects to the high-pressure gas filling equipment. In order to prevent gas leakage, a sealing process is required for the connections, and for this purpose, the high-pressure gas filling equipment requires a configuration required for the sealing process, which makes the configuration complex and increases costs. The drawback was that the number of man-hours required increased due to the increased sealing process for encapsulation.

(Problem to be solved by the invention) The problem to be solved by the invention is that the connection part of the pressurized reaction to the high-pressure gas filling equipment does not require the configuration required for the sealing process in the high-pressure gas filling equipment. There is something to do.

(Means for Solving the Problem) The present invention provides a high-pressure gas filling passage which serves as the connection part in the piston rod protruding from the sealed cylinder to the outside, and a check valve mechanism comprising a ball and a spring in the high-pressure gas filling passage. The above problem is solved by providing the following.

(Function) In the present invention, when filling high pressure gas, high pressure gas filling equipment is connected to the connection part of the high pressure gas filling path.
High-pressure gas can be sealed into the pressurized reaction against the spring of the check valve mechanism, which consists of a ball and spring in the high-pressure gas filling path, and when the high-pressure gas filling equipment is disconnected, the high-pressure gas filling path becomes the check valve mechanism. It will be automatically blocked.

(Example) An example of the present invention will be described in detail based on the illumination surface.

The pressurized reaction 1 includes a first bracket 2 and a second bracket 3 for attachment to a motorcycle, and a damping force generating device 4 movably connecting these brackets.

The damping force generating device 4 includes a sealed cylinder 11, a piston 5A that can slide within the sealed cylinder and divides the inside of the sealed cylinder into a first chamber 11' and a second chamber 11'', and the piston 5A. A piston rod 5 is integrally attached to one end of the piston rod.
The first end 5', on which the piston 5A is integrally attached, is open to the first chamber 11', and the second chamber 11'' is penetrated into the sealed cylinder 11. It has a second end 5'' which projects outward from the bottom and the other end is open to the outside air.
Gas 41 and oil 42 are filled in the first chamber 11' of the sealed cylinder 11, and only oil 42 is filled in the second chamber 11''.
1 is connected to a first bracket 2, and the piston rod 5 is connected to a second bracket 3, so that the damping force generating device 4 is designed as a cylinder-piston device.

The sealing cylinder 11 is sealed at the end on the first chamber 11' side by fixing the end plate 3 that connects the sealing cylinder 11 to the first bracket 2, and at the end on the second chamber 11'' side by a snap ring 17.
The rod guide case 18 is prevented from moving axially outward by the rod guide case 1.
Dust seal 1 installed outside of 8
9 and an oil seal cover 20 located inside and adjacent to the rod guide case 18, and the oil seal cover 20 has an oil seal 21 on the inside and a seal ring 22 on the outside. ing. In addition, the sealed cylinder 11
is equipped with a cap 16 screwed or press-fitted on the outermost side, and the cap 16 has a small air vent hole 1.
It has 6a.

The piston 5A is attached to a step 5a formed on the outer periphery of the piston rod 5 from the first end 5', the diameter of which is slightly reduced in a certain range following the first end 5'.

The piston 5A includes a valve stopper 34 and a first valve plate 3 including plates with different diameters.
5. A piston main body 36, a second valve plate 37 including plates of different diameters, and a piston washer 38 are provided, and the valve stopper 34 is arranged at the innermost part of the stepped portion 5a of the piston rod,
It is tightened and attached by a nut 39 via a piston washer 38. The nut 39 engages with the threaded portion 5c of the piston rod 5. A piston ring 40 is fitted onto the outer periphery of the piston body 36.

The piston body 36 is provided with several small holes 36a parallel to the axis. This small hole 36a passes through the piston body 36 and the first
The chamber 11' and the second chamber 11'' are communicated with each other, and the second chamber 11'' side is closed by a first valve plate 35. At this point, the first valve plate 35 is pushed up to cause the oil 42 to flow from the first chamber 11' to the second chamber 11'' of the sealed cylinder 11.
In addition, another small hole 36b passes through the piston body 36 obliquely with respect to its axis, and communicates the first chamber 11' and the second chamber 11'' of the sealed cylinder 11. The chamber 11' side of the cylinder 11 is closed by a second valve plate 37, and the oil 42 pushes up the second valve plate 37 during the extension process of the pressurized reaction 1, and 2nd chamber 11″ to 1st
The water is made to flow into the chamber 11'. The piston body 36 is provided with a ring groove 36c on the inside where the piston rod 5 is fitted.
6c is communicated with a small hole 36d that opens to the second chamber 11'' of the closed cylinder 11 of the piston body 36.

The ring groove 36c seals the first hole 27 of the piston rod 5 through the small hole 5b in the radial direction of the piston rod 5 and the second chamber 11'' of the cylinder 11.
is in constant communication with A rebound rubber 33 is attached to the piston rod 5 in the vicinity of the valve stopper 34 on the piston 5A, and this serves as a cushion for the oil seal cover 20 of the sealed cylinder 11 during the extension process.

The piston rod 5 has a first opening at its first end 5' for receiving a push rod 30.
a hole 27, a second hole 24 opened at its second end 5'' into which the stopper 23 is inserted and tightened, a threaded hole 25 following this hole 24, a first hole 27 and a threaded portion. A communication hole 26 is provided which communicates with the hole 25 and has a stepped portion between the first hole 27 and the first hole 27. The first hole 27 has a guide bush 28 on the first end 5' side of the piston rod 5. is press-fitted therein, and one end of a push rod 30 is accommodated therein guided by this guide bush 28, and the other end of the bush rod 30 is in contact with the end plate 3 of the hermetic cylinder 11.The first hole 27 has a communication hole. A ball 29 is arranged in the step between the ball 29 and the ball 26.
The spring 32 is adapted to act as a check valve mechanism by means of a spring 32 mounted between the ball 29 and the receiving end received in the first hole 27 of the push rod 30 guided by the guide bush 28. The stepped portion is always closed by receiving a pressing force in the direction of crimping against the stepped portion, and the push rod 30 is also subjected to a pressing force by the spring 32 in the direction of pushing it out from the first hole 27 through the accommodation end of the piston rod 30. The end plate 3 is in contact with the end plate 3.

The push rod 30 has a snap ring 31 fixedly attached to the outer periphery of the housing end, and a taper slot 30a having different depths in the axial direction. Taper slot 30a is push rod 3
Although the taper slot 30a does not reach the accommodation end of the push rod 30, the depth of the taper slot 30a becomes deeper as it approaches the accommodation end of the push rod 30, and as described above, the first hole 27 is connected to the second chamber of the sealed cylinder 11. 1
1'' and is constantly in communication.

The tapered slot 30a also communicates the first hole 27 along the guide bush 28 with the first chamber 11' of the sealed cylinder 11.

The threaded hole 25 serves as a connection when high-pressure gas is filled with high-pressure gas filling equipment, and the second hole 24 is used to permanently block gas and oil in the sealed cylinder 11 after filling the high-pressure gas. This is a hole into which the stopper 23 is inserted and tightened.

These holes of the piston rod 5, namely the first hole 27, the communication hole 26, the threaded hole 25 and the second hole 2
4 is on the same axis, and the ball 29 and the housing end of the push rod 30, and the housing end and the ball 29
A spring 32 installed between the two forms a high-pressure gas filling path.

Further, on the outer periphery of the first end 5' side of the piston rod 5, there is provided a stepped part 5a whose diameter is slightly reduced in order to attach the piston 5A, and on the second end 5'',
It passes through the second chamber 11'' of the sealed cylinder 11, passes through the oil seal 21 of the oil seal cover 20, passes through the rod guide case 18 and its dust seal 19, and the outermost cap 16, and passes from the inside of the sealed cylinder 11 to the outside. The outer periphery of the piston rod 5 on the second end 5'' side is connected to the second bracket 3.
The second end 5'' is open to the outside air.

The connection between the second bracket 3 and the piston rod 5 is achieved by fixing the second bracket 3 on the outer periphery of the piston rod 5.
is fixed to the piston rod 5 by tightening with a nut 7.

A bump rubber 8 surrounding the nut 7 is fixed on the stopper 6. The bump rubber 8 closes the closed cylinder 11 when the pressurized reaction 1 is compressed.
It becomes a cushion when the cap 16 comes into contact with it. At this time, the small air vent hole 16a of the cap 16
promotes the cushioning effect.

An outer cylinder 9 is further provided on the stopper 6 so as to be slidable with respect to the closed cylinder 11.
is erected, and a spring receiver 1 is installed on the outer cylinder 9.
0 is fitted, and a spring receiving seat 10a is supported on the seat 9a of the outer cylinder 9. A dust seal 12 is fitted to the open end of the outer cylinder 9. As mentioned above, the first
An end plate 13 is fixed to the end on the chamber 11' side, and this end plate 13 is fixed to the upper bracket 2. A spring seat is provided on the outer wall of the closed cylinder 11 near the end plate 13, and this spring seat includes a snap spring 14 for preventing the compression spring 15 provided between the two spring seats from moving in the axial direction. is installed.
The outer cylinder 9 functions as a dust cover.

Enclosure of high pressure gas into the sealed cylinder 11 will be described.

The sealed cylinder 11 is filled with the required amount of oil, and the high-pressure gas is filled by connecting a nozzle connected to high-pressure gas filling equipment (not shown) to the threaded hole 25 in the high-pressure gas filling path through the second hole 24. will be carried out. At this time, the ball 29 is
It is lifted from the step of the first hole 27 by the gas pressure against the force, and when the gas pressure of the sealed gas disappears, the blockage is achieved by the force of the spring 32, and the high pressure gas is blocked by the ball 29 and the spring. 32 automatically acts as a check valve mechanism. At this time, the ball 29 and the spring 32 function as a check valve mechanism to automatically achieve oil and gas blockage at the same time. Incidentally, permanent blockage of gas and oil is ensured by tightening the plug 23.

Next, the action of the pressurized reaction according to the present invention will be explained.

(Compression Stroke) The drawing shows a state in which the pressurized reaction 1 has reached its minimum length. The cap 16 of the closed cylinder 11 rests against the bump rubber 8, and the spring 15 is compressed to its minimum length. Gas 4 in sealed cylinder 11
1 is compressed to the minimum volume, and the taper slot 30a of the push rod 30 is fitted at the minimum depth within the fitting range with the guide bush 28 which determines the size of the aperture. When the pressurized reaction 1 is compressed from its maximum length, the small hole 3 parallel to the axis
The oil 42 passing through 6a pushes up the first valve plate 35 and flows from the first chamber 11' to the second chamber 11'' of the closed cylinder 11.

At the same time, the oil 42 in the first chamber 11' of the sealed cylinder 11 flows into the taper slot 30 of the push rod 30.
Small hole 5b in radial direction passing through a, ring groove 36
c, the first of the piston rod 5 through the small hole 36d.
It also flows through the hole 27 into the second chamber 11''.

In this case, the magnitude of the damping force depends on the compression force of the spring 15 and the flow resistance determined by the respective cross-sectional areas of the small hole 36a parallel to the axis and the tapered slot 30a of the push rod 30.

The cross-sectional area of the small hole 36a parallel to the axis remains constant, but the cross-sectional area of the taper slot 30a decreases as the compression amount of the pressurized reaction 1 increases, so at the stroke end of the compression stroke of the pressurized reaction 1. produces the maximum damping force.
This damping force prevents metal-to-metal collisions and achieves fluid damping with characteristics suitable for the driver.

(Extension stroke) On the other hand, in the extension stroke of the pressurized reaction 1, the oil 42 passes through the small hole 36b oblique to the axis of the piston 5A.
pushes up the second valve plate 37 and flows from the second chamber 11'' to the first chamber 11' of the sealed cylinder 11.At this time, the magnitude of the damping force is determined by the small hole 36b oblique to the axis of the piston 5A. It is determined by the resultant force due to the flow resistance determined by the respective cross-sectional areas of the hole 36d and the taper slot 30a.The above damping force characteristics are maintained until the minimum length spring 15 of the pressurized reaction 1 reaches its maximum extended length. During this period, the spring 15 acts in a direction to reduce the damping force, so the damping force gradually decreases from the point of start of extension compared to the compression stroke of the pressurized reaction.

This provides a suitable damping force for the driver.

A spring 32 is attached to the housing end of the push rod 30.
are in equal contact with each other, and the ball 29 is pressed against the step at the lower end of the first hole 27 by the lower end of the spring 32, so that the communication hole 26 is not blocked (checked).
While this is achieved, the damping force can also be adjusted depending on the position of the push rod 30.

(Effect of the invention) The pressurized reaction equipped with the damping force generating device according to the invention has a spring installed between the push rod, which makes the damping force dependent on the piston position, and the ball, which blocks high-pressure gas. A rational structure has been obtained in which the adjustment operation of the push rod is smooth and the check by the ball is still guaranteed even when the adjustment operation of the push rod is performed. As a result, high-pressure gas sealing of the pressurized reaction of the motorcycle cylinder can be suitably performed with a simple structure.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of a pressurized reaction according to the present invention. Symbols in the figure, 5... Piston rod, 5'... First end, 5''... Second end, 5A... Piston,
11... sealed cylinder, 11'... first chamber, 1
1″...Second chamber, 24...Second hole, 25...
Threaded hole, 26... Communication hole, 27... First hole,
29... Ball, 30... Push Rod, 32
……spring.

Claims (1)

[Claims for Utility Model Registration] 1. Sealed cylinder 11 and said sealed cylinder 11
A piston 5A that can slide inside and divide the inside into two into a first chamber 11' and a second chamber 11'', and the piston 5A are integrally attached to one end and are aligned with the axis of the sealed cylinder 11. and a piston rod 5, the piston rod 5 is equipped with the piston 5A.
a first end 5' which is integrally attached and one end of which is open to the first chamber 11';
The piston rod 5 has a second end 5'' which penetrates the chamber 11'' and projects from inside the sealed cylinder 11 to the outside, the other end of which is open to the outside air, and the piston rod 5 has a first end 5' which is open to the outside air. a first hole 27 provided at the second end 5'' for accommodating the push rod 30, a second hole 24 provided open at the second end 5'' for tightening the stopper, and a threaded hole 25 following this; A high-pressure gas filling path is provided, which has a communication hole 26 that connects the holes 25 and 27 and has a stepped portion between it and the first hole 27, and a ball 29 disposed in the stepped portion; A spring 32 is further installed in the high pressure gas filling path between the housing end of the push rod 30 housed in the first hole 27 and the ball 29, and the spring 32 is connected to the housing end of the push rod 30 on the one hand. It is characterized in that a pressing force is applied through the end in a direction to push the push rod out of the first hole 27 of the piston rod 5, and at the same time a pressing force is applied in a direction to press the ball 29 against the stepped portion. Pressurized reaction. 2. The pressurized reaction according to claim 1, wherein the threaded hole 25 of the high-pressure gas filling path is a connection part with high-pressure gas filling equipment.