JPH02102003U

JPH02102003U -

Info

Publication number: JPH02102003U
Application number: JP1081189U
Authority: JP
Priority date: 1989-02-02
Filing date: 1989-02-02
Publication date: 1990-08-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す縦断面図、第
２図は第１図の―に沿つた横断面図である。
第３図は公知の油圧シリンダーを示す縦断面図で
ある。１……高圧油噴出孔、２……ピストン、３……
通油路、４……逆止弁、５……絞り、６……油溝
、７……排油路、８……ピストンロツド、９……
ドレンポート、０１２……シリンダー、０１３…
…圧力供給ポート、０１４……圧力室、０１５…
…ロツドパツキン。 FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line - in FIG. 1.
FIG. 3 is a longitudinal sectional view showing a known hydraulic cylinder. 1... High pressure oil jet hole, 2... Piston, 3...
Oil passage, 4... Check valve, 5... Throttle, 6... Oil groove, 7... Oil drain passage, 8... Piston rod, 9...
Drain port, 012...Cylinder, 013...
...Pressure supply port, 014...Pressure chamber, 015...
...Rotsudpatzkin.

Claims

[Scope of utility model registration request]

A hydraulic cylinder having a piston rod passing through both end plates of the cylinder and having a piston protruding from the center thereof, a plurality of oil passages each extending from the front and rear surfaces of the piston through the inside of the piston to the center of the peripheral surface of the piston; A high-pressure check valve and a throttle inserted into each of the above oil passages, annular oil grooves provided around the front and rear sides of the piston circumferential surface, and each of the annular oil grooves and a drain port at one end of the piston rod, respectively. A hydraulic cylinder characterized by comprising a connecting oil drain passage.