JPH0263103U

JPH0263103U -

Info

Publication number: JPH0263103U
Application number: JP14330988U
Authority: JP
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-05-11

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は概略
的な構成を示す側断面図、第２図ａ，ｂは始動時
の状態を示す作用説明図、第３図ａ，ｂは作動中
の状態を示す作用説明図、第４図ａ，ｂは停止時
の状態を示す作用説明図である。また、第５図は
他の実施例を構成するスプールの側断面図である
。２……進退部材、３……第１のアクチユエータ
、４……第２のアクチユエータ、５……スプール
、６……高圧源、７……回転入力手段（ステツピ
ングモータ）、２１……スプール保持孔、２４…
…第１のポート、２５……第２のポート、２６…
…第１の流路、２７……第２の流路、３２，４２
……圧力室、５１……高圧螺旋溝、５２，５３…
…低圧螺旋溝。 The drawings show an embodiment of the present invention, in which Fig. 1 is a side sectional view showing the schematic structure, Fig. 2 a and b are action explanatory diagrams showing the state at startup, and Fig. 3 a and b are operation diagrams. FIGS. 4A and 4B are explanatory diagrams showing the operation when the engine is stopped. FIGS. Further, FIG. 5 is a side sectional view of a spool constituting another embodiment. 2... Advancement/retraction member, 3... First actuator, 4... Second actuator, 5... Spool, 6... High pressure source, 7... Rotation input means (stepping motor), 21... Spool holding Hole, 24...
...First port, 25...Second port, 26...
...First flow path, 27...Second flow path, 32, 42
...Pressure chamber, 51...High pressure spiral groove, 52, 53...
...Low pressure spiral groove.

Claims

[Scope of utility model registration request]

A reciprocating member having a spool holding hole and movable back and forth in the axial direction of the holding hole, a first actuator that biases the reciprocating member in the forward direction, and a second actuator that biases the retractable member in the backward direction. an actuator;
a first port opening on the inner periphery of the spool holding hole; a first flow path communicating the first port with the pressure chamber of the first actuator; a second port that opens adjacent to the rear side of the first port; a second flow path that communicates the second port with the pressure chamber of the second actuator; A spool that is slidably fitted, a high-pressure helical groove provided on the outer periphery of the spool and connected to the high-pressure source, and adjacent to the high-pressure helical groove on the front and rear sides of the spool outer periphery. The spool retaining hole has a low-pressure helical groove whose interior is open to a low-pressure region, and a rotation input means connected to the spool, and both ports of the spool holding hole advance and retreat from a position where both ports communicate with the high-pressure helical groove of the spool at the same time. A hydraulic positioning mechanism characterized by serving as a stopping position for a member.