JPH0656506U - Hydraulic cylinder piping fixing structure - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to reduce the number of parts, downsize the pipe fixing structure, and to use the hydraulic cylinder regardless of the diameter size of the cylinder, and to manufacture the hydraulic cylinder at a low cost. [Structure] The pipe 2 is arranged on the outer peripheral surface of the cylinder tube 1 via a spacer 4 having high elasticity, and the pipe 2 is fixed to the cylinder tube 1 with a band 3 having high elasticity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe fixing structure for a hydraulic cylinder.

[0002]

[Prior art]

 As shown in FIGS. 8 and 9, the conventional pipe fixing structure includes a first band 5 having a semicircular cross section in which a pipe receiving portion 6 is welded to the outer circumference of a cylinder tube 1 and one end of which is bent, The second bands 51 having the same shape are arranged so as to face each other, the ends of both the bands 5, 51 are fastened with the bolts 52 and the nuts 53, and then the pipe 2 is arranged in the pipe receiving portion 6, and the bolts are arranged. The pipe 2 is assembled by fastening the holder 61 to the pipe receiving portion 6 at 62.

Repetitive internal pressure fluctuations (deformation of the cylinder tube) peculiar to the hydraulic cylinder are absorbed by the deformation of the ends of the bands 5 and 51 and the tightening force of the bolt 52.

Further, as a conventional technique, there is one disclosed in Japanese Utility Model Publication No. 3-38501, which has a structure in which a grommet is interposed and fixed when a pipe is attached to a clamp body.

[0005]

[Problems to be solved by the device]

 However, the above-mentioned conventional technique has a problem that mounting is troublesome because the number of parts for mounting the pipe is large.

Further, since both ends of the band, the pipe receiving portion and the holder have protruding portions, a large space is required. Therefore, there is a problem that the structure cannot be downsized.

Further, since the band is formed in a semicircular shape in cross section, there is a problem that it is necessary to prepare the band for each diameter size of the cylinder tube.

Further, since the pipe fixing structure is complicated, there is a problem that it becomes expensive.

Therefore, the present invention was devised in view of the problems of the above-mentioned conventional techniques, and it is possible to reduce the number of parts, downsize the pipe fixing structure, and use it regardless of the diameter size of the cylinder. The purpose is to provide a pipe fixing structure for a hydraulic cylinder that can be manufactured.

[0010]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the pipe fixing structure of the hydraulic cylinder of the present invention, the pipe is arranged on the outer peripheral surface of the cylinder tube through a spacer having a high elasticity, and the pipe is stretchable in the cylinder tube. It is characterized by being fixed with a rich band.

[0011]

[Action]

 A spacer is arranged at a predetermined position on the outer circumference of the cylinder tube, and a pipe is arranged on the spacer through the spacer.

After that, the cylinder tube, the spacer, and the piping are tightened together with one band, and then a stopper is attached to the end of the band, and the stopper is fixed by caulking.

[0013]

【Example】

 An embodiment will be described with reference to Figs. 1 to 7. As shown in Figs. It is arranged.

In addition, a pipe 2 that serves as a passage for oil or the like such as a hydraulic cylinder is arranged via the spacer 4.

The band 3 is formed into a band shape by a deformable material having a restoring force and a high elasticity, such as plastic or rubber, and the band 3 is a single band, and the spacer 4 and the pipe 2 are attached to the cylinder tube 1. It is fixed by tightening it up in the form of bundling together.

The fixing means at the end portion of the band 3 is fixed by caulking 32 at one to several places with a stopper 31 as shown in FIG.

That is, as shown in FIG. 5, the end portions of the band 3 are arranged so as to overlap each other, the stopper 31 is disposed in this portion as shown in FIG. 4, and both sides of the stopper 31 are caulked 32 as shown in FIG. Processed and fixed.

As shown in FIG. 7, an end portion of the band 3 may be provided with an anti-slip portion 33 having a sawtooth or corrugated cross section so as to prevent loosening in the length direction.

The spacer 4 and the band 3 are made of a highly elastic material such as plastic so that the spacer 4 can absorb the repeated deformation of the cylinder tube 1 due to the fluctuation of the internal pressure of the hydraulic cylinder by the deformation and restoring repulsive force. , Rubber, etc., and select a material with low elasticity for the band 3, or conversely, select a material with low elasticity for the spacer 4, and select the aforementioned material with high elasticity for the band 3. Good.

[0020]

[Effect of device]

 Since the present invention is configured as described above, the pipe fixed to the cylinder tube is deformed by the spacer, which is highly elastic against the repeated deformation of the cylinder tube due to the fluctuation of the internal pressure of the hydraulic cylinder, the restoring force and the elasticity. It can be fixed in a state where it can be absorbed by the deformation and restoring force of the rich band.

Further, since the pipe can be fixed to the cylinder tube with the two parts of the spacer and the band, the number of parts can be reduced.

Further, since the pipe is fixed to the cylinder tube with the band and the spacer, the pipe can be structurally downsized, and since there is no protruding portion unlike the conventional structure, the space can be saved and the elasticity can be improved. The weight can be reduced because a spacer made of a material having a material and a band made of a material having elasticity are used.

[Brief description of drawings]

FIG. 1 is a diagram showing a state where a pipe of the present invention is attached.

FIG. 2 is a sectional view of a pipe mounting portion.

FIG. 3 is a perspective view of a stopper.

FIG. 4 is a cross-sectional view when a stopper is attached to the band.

FIG. 5 is a side view of the end portion of the band.

FIG. 6 is a front view when the end portion of the band is crimped with a stopper.

FIG. 7 is a side view of another embodiment of the end portion of the band.

FIG. 8 is a sectional view of a conventional pipe fixing structure.

FIG. 9 is a diagram showing a conventional pipe mounting state.

[Explanation of symbols]

 1 Cylinder tube 2 Piping 3 Band 31 Stopper 4 Spacer

Claims (1)

[Scope of utility model registration request] 1. A pipe fixing structure for a hydraulic cylinder, wherein pipes are arranged on the outer peripheral surface of the cylinder tube via spacers having high elasticity, and the pipe is fixed to the cylinder tube with a band having high elasticity.