JPS614005U - hydraulic actuator - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る油圧アクチュエータの断面図。 第２図は第１図の■一■断面図。図に都いて；１・・・
ハウジング、２・・・シリンダ、３・・・ピストン、３
ａ・・・（ピストンの）右室、４・・・圧縮ばね、５・
・・オリフィス、５ａ・・・圧縮ばね、５ｂ・・・油路
、５ｃ・・・（オリフィス内の）小径孔、６・・・ＯＮ
−ＯＦＦ弁。FIG. 1 is a sectional view of a hydraulic actuator according to the present invention. Figure 2 is a cross-sectional view of Figure 1. As shown in the figure; 1...
Housing, 2... Cylinder, 3... Piston, 3
a... Right chamber (of the piston), 4... Compression spring, 5...
... Orifice, 5a... Compression spring, 5b... Oil path, 5c... Small diameter hole (in the orifice), 6... ON
-OFF valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ハウジング内に設けられ、１端は油圧源に、他端はドレ
ンに通じるシリンダ２内にあって自動復動用圧縮スプリ
ング４で常時押圧されたピストン３と、該ピストン３を
貫通して設けられ、圧縮スプリングで常時曲方向に付勢
されピストン３１こ穿饅された油路を開閉するオリフイ
ス５と、ハウジング１の油圧源に設けたＯＮ−ＯＦＦ弁
６からなり、往動時はオリフイス開口面積を小に、ピン
トンの復動時にはオリフイスの開口面積を大きくなしう
るようにしたことを特徴とする油圧アクチュエータ。A piston 3 is provided in the housing, one end is connected to a hydraulic source, the other end is in a cylinder 2, and is constantly pressed by an automatic reciprocating compression spring 4. It consists of an orifice 5 that is always biased in the bending direction by a compression spring and opens and closes the oil passage bored by the piston 31, and an ON-OFF valve 6 provided in the hydraulic power source of the housing 1. During forward movement, the orifice opening area is A hydraulic actuator characterized in that the opening area of the orifice can be made large when the pinton moves backward.