JPS6342903U

JPS6342903U -

Info

Publication number: JPS6342903U
Application number: JP13708086U
Authority: JP
Priority date: 1986-09-05
Filing date: 1986-09-05
Publication date: 1988-03-22

Description

[Brief explanation of the drawing]

第１図は本考案油圧空圧シリンダの断面図、第
２図は第１図のＡ部詳細図、第３図は第２図内ポ
ートブロツクをＢより見た平面図、第４図は本考
案の他の実施例断面図、第５図は第４図のＣ部詳
細図、第６図は第５図のＤより見た平面図、第７
図は従来技術油圧シリンダの断面図である。１ａ，１ｂ，１′……油圧シリンダ、２，２′
……ピストンロツド、３……センタパイプ、４，
４′……シリンダ本体、７……正圧側ポート、８
……逆圧側ポート、１０……ポートブロツク、１
３，１４……環状溝。 Fig. 1 is a sectional view of the hydraulic pneumatic cylinder of the present invention, Fig. 2 is a detailed view of section A in Fig. 1, Fig. 3 is a plan view of the port block in Fig. 2 viewed from B, and Fig. 4 is the main part. 5 is a detailed view of section C in FIG. 4, FIG. 6 is a plan view as seen from D in FIG. 5, and FIG.
The figure is a sectional view of a prior art hydraulic cylinder. 1a, 1b, 1'...Hydraulic cylinder, 2, 2'
... Piston rod, 3 ... Center pipe, 4,
4'...Cylinder body, 7...Positive pressure side port, 8
...Reverse pressure side port, 10...Port block, 1
3, 14... annular groove.

Claims

[Scope of utility model registration request]

In a double-acting cylinder having a flow passage pipe in the piston rod, a center pipe having an outer diameter stepped portion is fixed almost concentrically to the piston rod inner cavity, and the inner diameter hole of the center pipe is used as a positive pressure side flow passage,
In addition, the space between the stepped portion of the outer diameter of the center pipe and the inner lumen of the piston rod is formed as a flow path on the reverse pressure side, while the port block is rotatably attached to the base end of the piston rod on the outside of the cylinder body, or is integrated with the piston rod. , an annular groove is installed in the inner diameter of the port block, and the center pipe inner diameter positive pressure side flow path and reverse pressure side flow path are configured to communicate with the positive pressure side port and the reverse pressure side port of the port block, respectively. The structure of hydraulic and pneumatic cylinders.