JPH09206877A - Cylinder groove processing device and processing method for gas cylinder device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the workability of a cylinder groove. A cylinder groove processing device (20) for a gas cylinder device, which forms a cylinder groove (6) capable of generating an extension side damping force on the inner circumference of a cylinder (2) of the gas cylinder device, can be accommodated in the cylinder. A slide member 2 in which a roller 26 is rotatably arranged in a protruding state, and a sliding contact surface 24 is formed at a position facing the processing roller.
1 and the main guide surface 27 that can be accommodated in the cylinder.
And a guide member 22 in which the first to fourth sub guide surfaces 28A to 28D are continuously provided, the sub guide surface guides the sliding contact surface of the slide member, and the processing roller does not abut on the inner surface of the cylinder. In this state, the main guide surface guides the sliding contact surface of the slide member to bring the processing roller into contact with the inner surface of the cylinder to allow the cylinder to bulge outward. The cylinder groove is formed by the processing roller by movement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas cylinder device in which a cylinder groove is formed on an inner surface of a cylinder along an axial direction, and a rod is pushed out by a reaction force of gas enclosed in the cylinder. The present invention relates to a cylinder groove processing device and a processing direction of a gas cylinder device for processing a groove.

[0002]

2. Description of the Related Art In a four-wheeled vehicle, a gas cylinder device is disposed between a rear door that is opened and closed around a horizontal axis with respect to a vehicle body and the vehicle body. The assist force from the gas cylinder device assists the rear door. There is something that can reduce the power required when opening. As shown in FIG. 4, among such gas cylinder devices, there is a gas cylinder device that provides good braking when the rod 5 is pushed out of the cylinder 2 at the end of extension.

That is, the gas cylinder device 1 of this type is
A piston 4, which divides the cylinder 2 into a piston side chamber 3A and a rod side chamber 3B, is slidably arranged in a cylinder 2 in which a gas such as air is sealed, and one end of a rod 5 is fixed to the piston 4. And this rod 5 is the cylinder 2
The cylinder groove 6 is formed in the inner circumference of the cylinder 2 along the axial direction of the cylinder 2.

Therefore, in the gas cylinder device 1, in the compression stroke in which the rod 5 is housed in the cylinder 2,
Since the gas (air or the like) in the piston side chamber 3A flows to the rod side chamber 3B through the check valve 7 arranged in the piston 4 and the cylinder groove 6, almost no damping force is generated,
The compression stroke of the gas cylinder device 1 can be carried out quickly.

Further, in the extension stroke of the gas cylinder device 1, the check valve 7 of the piston 4 is closed, so that when the gas in the rod side chamber 3B flows through the cylinder groove 6 to the piston side chamber 3A. The extensional damping force is generated by the flow resistance. On the other hand, in the extension stroke of the gas cylinder device 1, the reaction force of the gas in the piston side chamber 3A acts on the rod 5 via the piston 4 and pushes the rod 5 in the extension direction of the gas cylinder device 1. The pushing speed (extension speed) of the rod 5 in the extension direction is controlled by the side damping force.

Furthermore, when the gas cylinder device 1 is fully extended in the extension stroke, the piston 4 reaches a region where the cylinder groove 6 is not formed, and the cylinder 2, the piston 4, and the rod guide 8 arranged at the open end of the cylinder 2. A gas lock chamber is formed surrounded by, and braking at the time of full extension is satisfactorily performed. Reference numeral 9 in FIG. 4 indicates a gas seal.

By the way, as a conventional processing method for forming the cylinder groove 6 in the cylinder 2 of the above-described gas cylinder device 1, there is a bulge processing method as shown in FIGS. 5 (A) and 5 (B). This bulge processing method includes a first inner mold 11 and a second inner mold 1 each having a machining convex portion 10 having the same shape as the cylinder groove 6.
2 and 2 are inserted into the cylinder 2 in which the cylinder groove 6 is not processed,
Outer mold 1 having a machining recess 13 of the same shape as the cylinder groove 6
4 is arranged so as to face the first inner mold 11 with the cylinder 2 sandwiched between them, and the wedge-shaped punch 15 is pushed between the first inner mold 11 and the second inner mold 12 so that the machining convex of the first inner mold 11 is formed. Part 1
0 is pressed against the cylinder 2 to swell, and the first inner mold 1
The cylinder groove 6 is formed by the processing convex portion 10 of No. 1 and the processing concave portion 13 of the outer die 14.

[0008]

However, in the bulging method described above, the work of inserting the first inner mold 11 and the second inner mold 12 into the cylinder 2 and the first inner mold 11 and the second inner mold 1 are performed.
After pulling out the punch 15 from 2, the work of pulling out the first inner mold 11 and the second inner mold 12 from the cylinder 2 is troublesome. Further, the machining convex portion 10 of the first inner die 11 is formed over the entire length of the cylinder groove 6, and therefore the machining convex portion 10 of the first inner die 11 simultaneously forms the entire length of the cylinder groove 6. , Punch 1
The indentation processing force of 5 becomes large. From these things, it cannot be said that the workability of the cylinder groove 6 is necessarily good in this bulging method.

An object of the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a cylinder groove machining device and a machining method for a gas cylinder device capable of improving the workability of a cylinder groove. .

[0010]

According to a first aspect of the present invention, a piston provided with a rod is slidably disposed in a cylinder in which a gas is sealed, and the rod is driven by the reaction force of the gas. A cylinder of a gas cylinder device for forming a cylinder groove in the inner circumference of the cylinder that allows generation of an extension side damping force in the pushing stroke of the rod in the axial direction of the cylinder. In the groove processing device, it can be accommodated in the cylinder,
A guide member in which a processed portion is provided in a protruding manner, and a slide member having a sliding contact surface formed at a position facing the processed portion and a slide member which can be housed in the cylinder and in which a main guide surface and a sub guide surface are connected to each other. And the sub-guide surface guides the sliding contact surface of the slide member to bring the processed portion into non-contact with the inner surface of the cylinder, and the main guide surface has
By guiding the sliding contact surface of the slide member, the processed portion is brought into contact with the inner surface of the cylinder to allow the cylinder to bulge outward, and the slide member is fixed to the cylinder and the guide member. Forming the cylinder groove in the processed portion of the slide member by relatively moving in the axial direction of the cylinder and guiding the sliding contact surface of the slide member by the main guide surface of the guide member. Is.

According to a second aspect of the present invention, in the first aspect of the present invention, the processing portion is a processing roller rotatably disposed on the slide member in a protruding state.

According to a third aspect of the present invention, a piston provided with a rod is slidably disposed in a cylinder in which the gas is enclosed, and the reaction force of the gas allows the rod to be pushed out. In the cylinder device, in the cylinder groove processing method of a gas cylinder device, which forms an axially-extending cylinder damping groove in the inner circumference of the cylinder in the pushing stroke of the rod in the axial direction of the cylinder,
A slide member having a machined portion projecting therefrom and a sliding contact surface formed at a position facing the machined portion, and a guide member having a main guide surface and a sub guide surface continuously provided, The slide member is inserted into the cylinder in a non-contact state with the inner surface, and then the slide member is moved relative to the guide member and the cylinder in the axial direction of the cylinder so that the slide contact surface of the slide member is guided by the guide. The main guide surface of the member guides the processing part of the slide member to the inner surface of the cylinder to bulge the cylinder outward, and the processing part forms the cylinder groove. Then, after that, the processed portion of the slide member is brought into non-contact with the inner surface of the cylinder, and the slide member and the guide member are pulled out from the cylinder.

The invention described in claim 1 or 3 has the following effects. By moving the slide member relative to the cylinder and the guide member so that the sliding surface of the slide member is guided by the main guide surface of the guide member, the cylinder bulges outward at the processed portion of the slide member. Since a cylinder groove is formed along the axial direction on the inner surface of
The cylinder groove can be processed by a simple operation of relatively moving the slide member. Therefore, the workability of the cylinder groove can be improved.

Further, since the processed portion of the slide member is not brought into contact with the inner surface of the cylinder, and in this state, the slide member and the guide member can be inserted into the cylinder or pulled out from the cylinder, the slide member and the guide The work of inserting and pulling out the members does not become complicated. Therefore,
Also from this point, the workability of the cylinder groove can be improved.

The second aspect of the present invention has the following operation. When the processing roller is rolling, the inner surface of the cylinder bulges outward to form the cylinder groove, so the processing roller and the inner surface of the cylinder are in point contact, and a large processing force is required for the relative movement of the slide member. Not. Therefore, the workability of the cylinder groove can be further improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing one embodiment of a cylinder groove processing device and a processing method for a gas cylinder device according to the present invention. FIG. 2 is a diagram of FIG.
It is a sectional view taken along the line II-II. FIG. 3 shows II of FIG. 1 (A).
It is sectional drawing which follows the I-III line.

A cylinder groove machining device 20 of the gas cylinder device shown in FIG. 1 is for molding the cylinder groove 6 of the gas cylinder device 1 shown in FIG. 4 into a cylinder 2, and has a slide member 21 and a guide member 22. Consists of

The slide member 21 has an elongated shape that can be housed in the cylinder 2. A roller housing portion 23 is formed at the tip of the slide member 21, and a slide contact surface 24 and a taper surface 25 are continuously provided on the guide member 22 side. To be done. Further, on the guide member 22 side of the slide member 21, a support surface 31 is formed continuously with the tapered surface 25.

A processing roller 26 as a processing section is stored in the roller storage section 23, and the processing roller 26 is rotatably supported by the slide member 21 by a shaft 32.
A part of the processing roller 26 is provided so as to project to the side facing the sliding contact surface 24. Due to the surface of the processing roller 26, the cylinder groove 6 is formed on the inner surface of the cylinder 2 as described later.
Can be molded.

The guide member 22 is also formed in a long shape so that it can be housed in the cylinder 2. As shown in FIGS. 2 and 3, a part of the outer surface is a circumferential surface that can be fitted in the cylinder 2. It is formed. Further, the guide member 22 is formed with an accommodating portion 30 capable of accommodating the slide member 21 over the entire length in the axial direction, and the main guide surface 27, the first sub guide surface 28A, which are constituent surfaces of the accommodating portion 30, The second sub guide surface 28B, the third sub guide surface 28C, and the fourth sub guide surface 2
There is 8D.

As shown in FIG. 1, the first sub guide surface 28A is located on the front end side of the guide member 22 and the fourth sub guide surface 28D.
Are provided on the rear end side of the guide member 22, respectively. The second sub guide surface 28B connects the first sub guide surface 28A and the main guide surface 27 in series, and the third sub guide surface 28C connects the main guide surface 27 and the fourth sub guide surface 28D in series.
These second sub guide surface 28B and third sub guide surface 28
C is set to have the same taper as the tapered surface 25 of the slide member 21.

The first sub guide surface 28A and the fourth sub guide surface 28D of the guide member 22 guide the sliding contact surface 24 of the slide member 21 in the direction of arrow A in FIG. 26 is not brought into contact with the inner surface of the cylinder 2. In addition, the second sub guide surface 2 of the guide member 22.
8B guides the tapered surface 25 of the slide member 21 in the direction of arrow A in FIG. 1, and at this time, the processing roller 26 of the slide member 21 is gradually brought into contact with the inner surface of the cylinder 2 from the non-contact state. Further, the third sub-guide surface 28C of the guide member 22 guides the tip end portion 29 of the slide member 21 in the direction of arrow A in FIG. 1, and at this time, the processing roller 26 of the slide member 21 contacts the inner surface of the cylinder 2. The contact state is gradually changed to the non-contact state.

On the other hand, the main guide surface 27 of the guide member 22.
Guides the sliding contact surface 24 of the slide member 21 in the direction of arrow A in FIG. 1, and at this time, as shown by the chain double-dashed line in FIG. The cylinder 2 is allowed to abut in a point contact state to allow the cylinder 2 to bulge outward. With the sliding contact surface 24 of the slide member 21 being guided by the main guide surface 27 of the guide member 22,
By moving the slide member 21 relative to the guide member 22 and the cylinder 2 in the axial direction of the cylinder 2 in the direction of arrow A in FIG.
6 rolls, the bulging portion of the cylinder 2 is continuously formed by the processing roller 26, and as shown in FIGS. 1 and 3, the cylinder groove 6 can be formed.

Incidentally, reference numeral 33 in FIGS. 1 (A) and 1 (B),
Reference numeral 34 denotes a cylinder locking member and a guide locking member that lock the cylinder 2 and the guide member 22 during processing of the cylinder groove 6, respectively.

Next, the operation will be described. Slide member 21
Is accommodated in the accommodating portion 30 of the guide member 22, the main guide surface 27 of the guide member 22 supports the support surface 31 of the slide member 21, and the sliding contact surface 24 of the slide member 21 is the first guide member 22 The slide member 21 and the guide member 22 are inserted into the cylinder 2 in which the cylinder groove 6 is not machined while being in contact with the sub guide surface 28A. During this insertion, the processing roller 26 of the slide member 21 moves to the cylinder 2
Is not in contact with the inner surface of the.

Next, the slide member 21 and the guide member 22 are attached.
And relative to the cylinder 2 in the axial direction of the cylinder 2 in the direction of arrow A in FIG. 1 to guide the tapered surface 25 of the slide member 21 to the second sub guide surface 28B of the guide member 22 to move the slide member 21. The processing roller 26 of the above is gradually brought into contact with the inner surface of the cylinder 2, and the slide member 21
Of the cylinder groove extending in the axial direction to the inner surface of the cylinder 2 by guiding the sliding contact surface 24 of the guide member 22 to the main guide surface 27 of the guide member 22 and rolling the processing roller 26 into a point contact state with the inner surface of the cylinder 2. Mold 6.

After that, the slide member 21 is attached to the guide member 2
2 and the cylinder 2 in the same manner as described above, the tip 29 of the slide member 21 is guided to the third sub guide surface 28C of the guide member 22, and the machining roller 26 is not in contact with the cylinder 2 from the contact state. Put in contact. Thus,
The slide contact surface 24 of the slide member 21 is connected to the fourth of the guide member 22.
The sub guide surface 28D is contacted and guided.

Finally, with the sliding contact surface 24 of the slide member 21 in contact with the fourth sub guide surface 28D of the guide member 22, the slide member 21 and the guide member 22 are moved to the cylinder 2
Then, the working of the cylinder groove 6 is completed.

According to the above embodiment, the slide member 21 is moved relative to the cylinder 2 and the guide member 22 so that the sliding contact surface 24 of the slide member 21 is guided on the main guide surface 27 of the guide member 22. Thus, the cylinder 2 is bulged outward by the processing roller 26 of the slide member 21 and the cylinder groove 6 is formed on the inner surface of the cylinder 2 along the axial direction. Therefore, a simple operation of relatively moving the slide member 21. The cylinder groove 6 can be processed by. Therefore, the workability of the cylinder groove 6 can be improved.

Further, the sliding contact surface 24 of the slide member 21 is brought into sliding contact with the first sub guide surface 28A and the fourth sub guide surface 28D of the guide member 22, so that the processing roller 26 of the slide member 21 is brought into contact with the inner surface of the cylinder 2. In the non-contact state, the slide member 21 and the guide member 22 are placed in the cylinder 2 in this state.
Since the slide member 21 and the guide member 22 are inserted into or pulled out from the cylinder 2, the work of inserting and withdrawing the slide member 21 and the guide member 22 is not complicated. Therefore, also from this point, the workability of the cylinder groove 6 can be improved.

Further, since the machining roller 26 axially supported by the slide member 21 rolls to bulge the inner surface of the cylinder 2 outward to form the cylinder groove 6, the machining roller 2 is formed.
6 and the inner surface of the cylinder 2 are in a point contact state, and a large processing force is not required for the relative movement of the slide member 21. Therefore, the workability of the cylinder groove 6 can be further improved.

Further, when the cylinder groove 6 is machined in a large number of cylinders 2, it is only necessary to replace the machining roller 26 as a consumable product, and other parts can be used as they are, so that the cost increase can be avoided.

In the above embodiment, the slide member 2
The case where the first processing portion is the rolling processing roller 26 has been described, but the processing portion may be a processing portion integrally formed with the slide member 21 or integrally projecting.

When the sliding contact surface 24 of the slide member 21 contacts the first sub guide surface 28A of the guide member 22 and the processing roller 26 is not in contact with the inner surface of the cylinder 2,
The case where the support surface 21 of the slide member 21 is supported by the main guide surface 27 of the guide member 22 has been described, but the support of the slide 21 is provided on condition that the processing roller 26 is not in contact with the inner surface of the cylinder 2. The surface 31 is the guide member 22.
If the slide contact surface 24 of the slide member 21 is supported by the main guide surface 27 of the first sub guide surface 2 of the guide member 22,
It does not have to be in contact with 8A.

[0035]

As described above, according to the cylinder groove processing apparatus and the processing method of the gas cylinder device of the present invention, the workability of the cylinder groove can be improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a cylinder groove machining device and machining method for a gas cylinder device according to the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a vertical cross-sectional view showing a gas cylinder device.

FIG. 5 is an operation diagram of forming a cylinder groove in a cylinder by a bulging method.

[Explanation of symbols]

 1 Gas Cylinder Device 2 Cylinder 4 Piston 5 Rod 6 Cylinder Groove 20 Gas Cylinder Device Cylinder Groove Machining Device 21 Slide Member 22 Guide Member 24 Sliding Contact Surface 26 Machining Roller 27 Main Guide Surface 28A First Sub Guide Surface 28B Second Sub Guide Surface 28C Third sub guide surface 28D Fourth sub guide surface

Claims (3)

[Claims] 1. A gas cylinder device in which a piston provided with a rod is slidably disposed in a cylinder in which gas is sealed, and the rod can be pushed out by a reaction force of the gas, In a cylinder groove processing device of a gas cylinder device for forming a cylinder groove in the inner circumference of the cylinder, which allows the extension side damping force to be generated in the pushing stroke of the rod in the axial direction of the cylinder, the cylinder groove processing device can be accommodated in the cylinder. A guide in which a processing portion is provided in a protruding manner and a slide contact surface is formed at a position facing the processing portion, and a guide which can be housed in the cylinder and in which a main guide surface and a sub guide surface are connected to each other. A member, the sub-guide surface guides the sliding contact surface of the slide member to bring the processed portion into non-contact with the inner surface of the cylinder, and the main guide surface is By guiding the sliding contact surface of the ride member, the processed portion is brought into contact with the inner surface of the cylinder to allow the cylinder to bulge outward, and the slide member is fixed to the cylinder and the guide member to the cylinder. By relatively moving the slide contact surface of the slide member by the main guide surface of the guide member to form the cylinder groove in the processed portion of the slide member. Cylinder groove processing device of the characteristic gas cylinder device. 2. The cylinder groove machining apparatus for a gas cylinder device according to claim 1, wherein the machining section is a machining roller rotatably disposed on the slide member in a protruding state. 3. A gas cylinder device in which a piston provided with a rod is slidably disposed in a cylinder in which gas is sealed, and the rod can be pushed out by the reaction force of the gas, In a cylinder groove machining method of a gas cylinder device, which forms a cylinder groove in the inner circumference of the cylinder that enables generation of an extension side damping force in the pushing stroke of the rod, in the cylinder groove machining method of a gas cylinder device, A slide member having a slide contact surface formed at a position opposite to the processed portion and a guide member having a main guide surface and a sub guide surface connected to each other are set in a non-contact state with the processed portion on the inner surface of the cylinder. Then, the slide member is inserted into the cylinder, and then the slide member is relatively moved in the axial direction of the cylinder with respect to the guide member and the cylinder so that the sliding contact surface of the slide member becomes Guided by the main guide surface of the material, whereby the processed portion of the slide member abuts the inner surface of the cylinder to bulge the cylinder outward, and the processed portion forms the cylinder groove. Then, after that, the processed portion of the slide member is brought into non-contact with the inner surface of the cylinder, and the slide member and the guide member are pulled out from the cylinder.