JPS6414562U

JPS6414562U -

Info

Publication number: JPS6414562U
Application number: JP11104387U
Authority: JP
Priority date: 1987-07-20
Filing date: 1987-07-20
Publication date: 1989-01-25

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すもので、第１図
は縦断側面図、第２図は第１図の要部拡大図、第
３図は入力−出力特性線図である。１……シリンダ本体、７，８……マスタピスト
ン、４２……ブースタシリンダ、５３……ブース
タピストン、５６……入力油圧室、５７……出力
油圧室、５８……出口室、６３……出力杆、７８
……弁ピストン、７９……入口弁、８０……出口
弁、８５……反動機構、８７……反動ピストン、
８８……設定ばね、８９……反力室、９１……反
力規制弁、９２……弁体部、９３……弁孔、９８
……操作部材としてのプツシユロツド、Ｂ……油
圧ブースタ、Ｍ……マスタシリンダ。 The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal sectional side view, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is an input-output characteristic diagram. 1... Cylinder body, 7, 8... Master piston, 42... Booster cylinder, 53... Booster piston, 56... Input hydraulic chamber, 57... Output hydraulic chamber, 58... Outlet chamber, 63... Output rod, 78
... Valve piston, 79 ... Inlet valve, 80 ... Outlet valve, 85 ... Reaction mechanism, 87 ... Reaction piston,
88... Setting spring, 89... Reaction force chamber, 91... Reaction force regulating valve, 92... Valve body portion, 93... Valve hole, 98
... Push rod as an operating member, B ... Hydraulic booster, M ... Master cylinder.

Claims

[Scope of utility model registration request]

A booster piston, which has an output rod at its tip that contacts the rear end of the master piston that is slidably fitted to the cylinder body, is slidably fitted into a booster cylinder that is coupled to the rear end of the cylinder body of the master cylinder. A valve piston connected to the operating member and slidably fitted to the booster piston is connected between the output hydraulic chamber formed facing the back of the booster piston and the input hydraulic chamber communicating with the hydraulic pressure supply source. An inlet valve that opens when the booster piston moves forward relative to the booster piston is interposed between the output hydraulic pressure chamber and an outlet chamber communicating with the oil tank, and closes when the valve piston moves forward relative to the booster piston. In a hydraulic booster in which an outlet valve is interposed and a reaction mechanism is provided between the booster piston and the valve piston to transmit the operating reaction force of the output rod to the valve piston, the reaction mechanism has a reaction chamber between the tip of the valve piston and the valve piston. a recoil piston that forms a recoil piston and is slidably fitted to the tip of the booster piston, and a setting spring that is interposed between the booster piston and the recoil piston to bias the recoil piston toward the reaction force chamber. Prepare,
A reaction force is formed between the outlet valve and the output hydraulic chamber by a valve body protruding from the rear end of the reaction piston and a valve hole bored at the tip of the valve piston and communicating with the output hydraulic chamber. A hydraulic booster characterized in that a regulating valve is provided, and the reaction force regulating valve is set to close prior to opening of an inlet valve when the valve piston moves forward relative to the booster piston.