JPH0615124Y2 - Single acting fluid pressure cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a single-acting fluid pressure cylinder used in an industrial machine utilizing fluid pressure.

[Prior Art] In a fluid pressure cylinder, if the piston and the cylinder and the rod and the rod cover are eccentric, the frictional resistance of the sliding portion increases and malfunction occurs, so it is necessary to slide them concentrically. For this purpose, it is effective to connect the piston and the rod so as to be relatively movable in the radial direction. Therefore, there has been proposed a fluid pressure cylinder in which a piston and a rod are formed with a spherical rocking surface on either or both of them, and these rocking surfaces are connected so as to be relatively rockable in the radial direction. (As an example,
61-67460 publication).

However, the known fluid pressure cylinder described above has a problem in that it is expensive because the spherical rocking surface is difficult to machine, and when the rocking surface is worn due to friction, the centering function is deteriorated.

[Problems to be Solved by the Invention] The problem to be solved by the present invention is to provide a fluid pressure cylinder which is inexpensive, has almost no frictional resistance at the time of bending, and has a large degree of freedom and is capable of smoothly self-centering. is there.

[Means for Solving the Problems] In order to solve the above problems, the present invention includes a cylinder, a piston and a rod that slide in the cylinder, and applies a pressure fluid to one of the pressure chambers defined by the piston. A single-acting fluid pressure cylinder for supplying and discharging to drive and return the piston is characterized in that the piston and the rod are integrally slidably connected by a bendable rope.

[Operation] When the piston and the rod slide when the pressure fluid is supplied to and discharged from the pressure chamber, the piston and the rod are connected by a bendable rope, so that the cylinder is automatically aligned with a large degree of freedom. .

Since the rope connection has almost no frictional resistance during bending, malfunctions due to friction can be prevented.

Further, the structure of the swinging portion is extremely simple and inexpensive as compared with the case where the spherical swinging surface is formed on the piston or the rod.

[Embodiment] FIG. 1 shows an embodiment of the present invention. A cylinder 10 configured as a single-acting fluid pressure cylinder includes a cylinder tube 11, a head cover 12 and a rod cover 13 screwed to both ends thereof.
16 and a rod that has a cylinder and slides in the cylinder 10.
17 is connected so as to be slidable integrally by a bendable rope 19 whose both ends are fixed by holding bodies 18, 18 screwed to these, and when the rope 19 is extended, the piston 16 and the rod are There is a small gap between 17's.

Cylinder 10 is connected to the rod side pressure chamber 20 by piston 16.
And a breathing chamber 21 on the head side.A cover 12 is provided with a breathing port 22 communicating with the breathing chamber 21, and a cover 13 is provided with a pressure fluid supply / discharge port 23 communicating with the pressure chamber 20. ing.

When the fluid pressure cylinder supplies the pressure fluid to the pressure chamber 20, the piston 16 moves to the right in the figure and the rod 16
17 also moves to the right with the piston by the rope 19 and moves to the pressure chamber.
When the pressure fluid 20 is discharged and the rod 17 slides in the opposite direction by a load (not shown) or the like, the piston 16 also slides in the same direction by the rope 19.

In this case, the piston 16 and rod 17 are
Since they are connected by 19, the cylinder tube 11 and the rod cover 13 are automatically aligned with a large degree of freedom when they slide, and therefore malfunctions due to eccentricity can be prevented.

Further, since the rope 19 has no frictional resistance at the time of bending, the operation is smooth even if the eccentricity is large and there is almost no increase in sliding resistance due to self-centering, so it is necessary to particularly reduce the sliding resistance. It is suitable for hydraulic cylinders and is extremely inexpensive.

[Effects of the Invention] In the single-acting fluid pressure cylinder of the present invention, since the piston and the rod are integrally slidably connected by a bendable rope, they are automatically aligned with great freedom during sliding. Therefore, malfunction due to eccentricity can be prevented.

Also, since the rope connection has no frictional resistance during bending, the operation is smooth even if the eccentricity is large, there is almost no increase in sliding resistance due to self-centering, and the configuration is extremely simple and inexpensive. .

[Brief description of drawings]

 FIG. 1 is a front view of a half section of an embodiment of the present invention. 10 …… Cylinder, 16 …… Piston, 17 …… Rod, 19 …… Rope.

Claims (1)

[Scope of utility model registration request] 1. A single-acting fluid pressure system comprising: a cylinder; a piston and a rod that slide in the cylinder; and a pressure fluid supplied to and discharged from one of the pressure chambers defined by the piston to drive and return the piston. A single-acting fluid pressure cylinder, wherein the piston and the rod are integrally slidably connected by a bendable rope.