JPH01111868U

JPH01111868U -

Info

Publication number: JPH01111868U
Application number: JP621588U
Authority: JP
Priority date: 1988-01-20
Filing date: 1988-01-20
Publication date: 1989-07-27

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の全体半断面図、第２
図は従来技術の全体半断面図を示す。１……シリンダチユーブ、２，２―１……ピス
トン、２ｃ，２ｃ―１……凹部、２ｄ，２ｄ―１
……テーパー面、３，３―１……ピストンロツド
、３ｂ，３ｂ―１……ねじ部、３ｅ……ねじ部、
４，４―１……ピストンナツト、４ａ，４ａ―１
……凸部、４ｂ，４ｂ―１……凹部。 Figure 1 is an overall half-sectional view of an embodiment of the present invention;
The figure shows an overall half-sectional view of the prior art. 1... Cylinder tube, 2, 2-1... Piston, 2c, 2c-1... Recess, 2d, 2d-1
...Tapered surface, 3, 3-1...Piston rod, 3b, 3b-1...Threaded part, 3e...Threaded part,
4, 4-1...Piston nut, 4a, 4a-1
...Convex portion, 4b, 4b-1...Concave portion.

Claims

[Scope of Claim for Utility Model Registration] A piston rod passes through a piston that is slidably fitted into a cylinder tube, and the piston rod and a piston nut are screwed and fixed, and the piston expands toward the piston nut side. A hydraulic cylinder having a configuration in which a truncated cone-shaped recess with a tapered surface is formed, a convex part that fits into the concave part of the piston is provided on the piston side of the piston nut, and an annular concave part is formed on the inner periphery of the tip of the convex part. In the piston locking device, a threaded portion is provided in the penetrating portion of the piston rod of the piston for screwing and fixing both, and the threaded portion of the piston nut is made to have a smaller diameter than this threaded diameter, and
1. A locking device for a piston of a hydraulic cylinder, characterized in that the pitch of the thread of the piston nut is made thinner than the pitch of the thread of the piston, or the directions of the two threads are different.