JPH071304U - Fluid pressure cylinder - Google Patents

Abstract

(57) [Summary] [Purpose] In a fluid pressure cylinder, a stopper inside the cylinder is moved forward and backward to obtain a simple, space-saving fluid stroke cylinder with variable stroke. [Structure] In a fluid pressure cylinder that is used in industrial robots that use fluid pressure as a drive source and has a built-in piston, move the stopping position of the advancing piston from the outside of the cylinder to the stopper inside the cylinder to advance the cylinder stroke. I made it variable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fluid pressure cylinder used in an industrial machine such as a robot that uses fluid pressure as a drive source and having a piston that moves forward and backward.

 [Prior Art] It is already known that a fluid pressure cylinder is used in a robot or the like that uses fluid pressure as a drive source.

 This fluid pressure cylinder has been provided with another positioning device outside the cylinder when performing positioning of a work, a jig, and the like.

 As a result, the size of robots will become larger, more driving force will be required, equipment costs will increase, and more installation space will be required.

 However, it is possible to incorporate a positioning device, but when it is built-in, it is necessary to maintain the airtightness of the inner part, so the sealing method is difficult and the cylinder is rather large.

 [Problems to be Solved by the Invention] In the present invention, in the fluid pressure cylinder, the stroke of the cylinder can be changed by moving the stop position of the advancing piston back and forth from the outside of the cylinder to the stopper inside the cylinder. The problem to be solved is to obtain a simple and space-saving fluid pressure cylinder.

 [Means for Solving Problems] In the present invention, in the fluid pressure cylinder, the stopping position of the advancing piston is changed by moving the stopper inside the cylinder back and forth from outside the cylinder so that the stroke of the cylinder can be changed. The above problem is solved.

 [Operation] When the stopping position of the advancing piston is rotated from the outside of the cylinder to the lot cover 5 provided with a seal for maintaining the airtightness of the inside, the screw is attached to the lot cover 5 The stroke of the cylinder is made variable by moving the stopper of which rotation is prevented back and forth.

 [Embodiment] FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5 show a first embodiment of the present invention. In FIG. A piston cover 4 is provided, one of which is a cylinder cover 7 and the other is a lot cover 5.

 A screw is provided on the pressure chamber 3 side of the lot cover 5, and a stopper 6 is connected so as to engage with the screw. A stopper groove 13 is provided on a part of the outer circumference of the stopper 6 so as not to rotate by the stopper 8, and a fluid pressure groove 12 is provided on a part of the outer circumference so that the fluid pressure can pass therethrough.

 An adjusting groove 14 is provided on the lot cover 5 side of the body 1 so that the lot cover 5 can be rotated, and an adjusting hole 15 is provided on the outer circumference of the lot cover 5.

 Next, the operation of the above first embodiment will be described.

 FIG. 1 shows a state in which the port 9 communicates with the outside and the piston is at the upper end in the figure by the pressure fluid supplied from the port 10 to the pressure chamber 3, and the stopper 6 is at the uppermost end.

 Next, the stopper 8 is loosened to the extent that it does not come out of the stopper groove 13.

 Next, when the pressure fluid supplied to the port 10 is stopped and the pressure fluid is supplied from the port 9, the piston 4 is at the lower end in the figure as shown in FIG. At this time, since the stopper 6 is at the uppermost end, the piston 4 has moved the shortest stroke.

 Next, as shown in FIG. 2, by turning the lot cover 5 upward and downward in the figure, the screw on the pressure chamber 3 side of the lot cover 5 rotates as shown in FIG. 1, and engages with this screw. As described above, the stopper 6 is connected, and the stopper groove 13 is provided at one portion on the outer periphery of the stopper 6, so that the stopper 8 does not rotate but ascends and descends in the figure.

 When the lot cover 5 is rotated as shown in FIG. 5 and the stopper 6 is set to the lowermost end in the figure, the result is as shown in FIG. 4, so that the shortest stroke in FIG. 5 can be changed to the longest stroke in FIG. Becomes

 Further, FIG. 6 shows a second embodiment. As shown in FIG. 6, the stopper 6 may have not only the descending end but also the ascending end or both the descending end and the ascending end.

[Effects of the Invention] The fluid pressure cylinder of the present invention can be easily and space-saving because the stroke position of the forward piston can be changed by moving the stopper inside the cylinder back and forth from outside the cylinder.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of the upper end of the piston of the first embodiment of the present invention, FIG. 2 is a transverse sectional view of the same section AA, and FIG.
4 is a longitudinal sectional front view with the piston at the lower end for the longest stroke, FIG. 5 is a longitudinal sectional front view for the piston with the lower end at the shortest stroke, and FIG. 6 is a longitudinal front view with the piston of the second embodiment at the upper end. : Body, 2: Cylinder, 3: Pressure chamber,
4: Piston, 5: Lot cover,
6: Stopper, 7: Cylinder cover, 8: Stopper, 9: Port, 10: Port, 11: Retaining ring, 12: Fluid pressure groove, 13: Stop groove,
14: adjustment groove, 15: adjustment hole,

Claims (1)

[Scope of utility model registration request] In a fluid pressure cylinder containing a piston that enables forward and backward movement, the stop position of the forward piston is
A fluid pressure cylinder characterized in that the stroke of the cylinder can be changed by moving the stopper inside the cylinder back and forth from the outside of the cylinder.