JPS61152567U

JPS61152567U -

Info

Publication number: JPS61152567U
Application number: JP3678185U
Authority: JP
Priority date: 1985-03-14
Filing date: 1985-03-14
Publication date: 1986-09-20

Description

[Brief explanation of the drawing]

第１図は本考案による負圧式倍力装置の一実施
例を示す断面図、第２図は第１図の―線に沿
う断面図、第３図はプレート（流量制限部材）の
変形例を示す背面図、第４図は第３図に示したプ
レート（流量制限部材）の断面図である。符号の説明、１０…ハウジング、２０…ダイア
フラム付ピストン、２１…ピストン本体、２１ａ
…内孔、２１ｂ…（第２）弁座、２２…ダイアフ
ラム、３０…バルブプランジヤ、３０ｂ…（第１
）弁座、４０…コントロールバルブ、４１…スプ
リング、６０…入力ロツド、８０…プレート（流
量制限部材）、９０…出力ロツド、Ｒａ…定圧室
、Ｒｂ…変圧室。 Fig. 1 is a sectional view showing an embodiment of the negative pressure booster according to the present invention, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a modified example of the plate (flow restriction member). The rear view shown in FIG. 4 is a sectional view of the plate (flow rate restriction member) shown in FIG. 3. Explanation of symbols, 10...Housing, 20...Piston with diaphragm, 21...Piston body, 21a
...inner hole, 21b...(second) valve seat, 22...diaphragm, 30...valve plunger, 30b...(first)
) Valve seat, 40... Control valve, 41... Spring, 60... Input rod, 80... Plate (flow rate limiting member), 90... Output rod, Ra... Constant pressure chamber, Rb... Variable pressure chamber.

Claims

[Scope of utility model registration request]

A piston with a diaphragm that divides the inside of the housing into a constant pressure chamber to which negative pressure is applied at all times and a variable pressure chamber to which negative pressure or atmospheric pressure is applied, and a piston that slides in the axial direction within the middle part of the inner hole provided at the axis of this piston. a valve plunger connected to a distal end of an input rod that can be fitted into the input rod and extends rearward; The variable pressure chamber is formed at the rear of the diaphragm of the piston and is urged forward by a spring so as to be seated on the valve seat or an annular second valve seat provided on the inner wall of the inner hole. a cylindrical control valve communicating with the constant pressure chamber or the atmosphere;
an output rod coaxially assembled to the front part of the piston and interlocked with the piston, and when the valve plunger is pushed forward by operation of the input rod, the control valve is activated by the second control valve. In a negative pressure booster seated on a valve seat and separated from the first valve seat so that the atmosphere flows into the variable pressure chamber through the rear end of the inner hole and through the control valve, A negative pressure booster characterized in that a flow rate restriction member is installed behind the control valve to restrict the inflow of atmospheric air into the variable pressure chamber.