JPS63166866U

JPS63166866U -

Info

Publication number: JPS63166866U
Application number: JP6117487U
Authority: JP
Priority date: 1987-04-21
Filing date: 1987-04-21
Publication date: 1988-10-31

Description

[Brief explanation of the drawing]

第１図は本考案の実施例であるエアオーバ・ハ
イドロリツク・ブースタの側断面図、及び第２図
は第１図における複弁装置の拡大側面図である。なお図において、１……エアオーバ・ハイドロ
リツク・ブースタ、２……エアシリンダ部、４…
…シリンダ・ケーシング、１４……第２のシリン
ダ・ピストン、２６，３２……圧力室、２９……
第１のシリンダ・ピストン、３３……背室、３６
……連結ロツド。 FIG. 1 is a sectional side view of an air-over-hydraulic booster according to an embodiment of the present invention, and FIG. 2 is an enlarged side view of the multiple valve device shown in FIG. 1. In the figure, 1... air over hydraulic booster, 2... air cylinder section, 4...
...Cylinder casing, 14...Second cylinder piston, 26, 32...Pressure chamber, 29...
First cylinder piston, 33...back chamber, 36
...Connection rod.

Claims

[Scope of utility model registration request]

A hydraulic cylinder in which a main pressure chamber and an auxiliary pressure chamber are partitioned by slidably inserting a hydraulic piston into a cylinder hole, and a hydraulic cylinder that allows liquid to move from the auxiliary pressure chamber side to the main pressure chamber side and vice versa. is a first valve that can be prohibited;
a second valve that prohibits liquid movement from the auxiliary pressure chamber to the hydraulic fluid reservoir below a predetermined pressure; a pneumatic body disposed coaxially with the hydraulic cylinder; and a second valve that is movable within the pneumatic body. a movable body that is inserted and partitions a pressure-free chamber on the side of the hydraulic cylinder and a pressure chamber into which compressed air is introduced on the opposite side; In a pneumatically actuated two-stage master cylinder that has an intermediate output member that transmits to a hydraulic piston, a large diameter portion is provided on the pressure chamber side of the pneumatic main body, and the pressure receiving area is larger than the movable body and has a maximum stroke. A second movable body with a smaller stroke is provided, and compressed air is supplied to a side of the second movable body opposite to the first movable body, and when the stroke is less than a predetermined stroke, the second movable body A pneumatically actuated two-stage master cylinder in which communication on both sides is restricted and when the predetermined stroke is exceeded, both sides of the second movable body are communicated.