JPS61131366U

JPS61131366U -

Info

Publication number: JPS61131366U
Application number: JP1542585U
Authority: JP
Priority date: 1985-02-06
Filing date: 1985-02-06
Publication date: 1986-08-16
Also published as: JPH0343900Y2

Description

[Brief explanation of the drawing]

第１図は本考案によるバキユームブースタの第
１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図は緩衝体単体の断面図、
第４図は本考案によるバキユームブースタの第２
実施例を示す部分断面図、第５図は第４図の―
線に沿う断面図である。符号の説明、１０……ハウジング、２０……ダ
イアフラム付きピストン、２１……ピストン本体
、２１ａ……内孔、２１ｂ……（第２）弁座、２
１ｆ……取付孔、２２……ダイアフラム、３０…
…バルブプランジヤ、３０ａ……環状溝、３０ｂ
……（第１）弁座、４０……コントロールバルブ
、５０……リアクシヨンゴムデイスク、６０……
入力ロツド、７０，１７０……キー、７２，７３
，１７２，１７３……指状部、８０……出力ロツ
ド、９０，１９０……緩衝体、Ｒａ……定圧室、
Ｒｂ……変圧室。 FIG. 1 is a sectional view showing the first embodiment of the vacuum booster according to the present invention, and FIG.
A cross-sectional view along the line, Figure 3 is a cross-sectional view of the shock absorber alone,
Figure 4 shows the second version of the vacuum booster according to the present invention.
A partial cross-sectional view showing the embodiment, FIG. 5 is the same as in FIG. 4.
It is a sectional view along a line. Explanation of symbols, 10... Housing, 20... Piston with diaphragm, 21... Piston body, 21a... Inner hole, 21b... (Second) valve seat, 2
1f...Mounting hole, 22...Diaphragm, 30...
...Valve plunger, 30a...Annular groove, 30b
... (1st) valve seat, 40 ... control valve, 50 ... reaction rubber disk, 60 ...
Input rod, 70, 170...key, 72, 73
, 172, 173...Finger-shaped portion, 80...Output rod, 90, 190...Buffer body, Ra...Constant pressure chamber,
Rb...Transformer room.

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 tip of an input rod that can be fitted into the piston and extends rearward; and the valve plunger is fitted into a mounting hole provided in the piston substantially orthogonally to the inner hole of the piston with a predetermined axial clearance. a key that engages with a stepped portion formed on the outer periphery of the valve plunger to define the amount of retraction of the valve plunger with respect to the piston; The variable pressure chamber formed at the rear of the diaphragm is selectively seated on the annular first valve seat provided in the inner hole or the annular second valve seat provided in the inner hole, and the constant pressure chamber formed in the front of the diaphragm is The control valve is provided with a cylindrical control valve that is linked to the chamber or the atmosphere, and an output rod that is coaxially assembled to the front part of the piston and is linked to the piston, and the key is provided with the piston in the retracted position. In the vacuum booster, in the vacuum booster, a finger-like part that comes into contact with the inner surface of the rear wall of the housing and defines a retracted position of the valve plunger is formed to extend in a plane substantially perpendicular to the axis of the piston. A cylindrical shock absorber having the same cross-sectional shape is inserted and fixed in the finger-like section, and a part of the shock absorber is interposed between the finger-like section and the inner surface of the rear wall of the housing where the finger-like section abuts. Features Bakyum Booster.