JPS60119670U

JPS60119670U - Brake booster

Info

Publication number: JPS60119670U
Application number: JP750084U
Authority: JP
Inventors: 暁佐藤; 淳一大木
Original assignee: 自動車機器株式会社
Priority date: 1984-01-23
Filing date: 1984-01-23
Publication date: 1985-08-13
Also published as: JPH035496Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示したものであって、第１図
はブレーキ倍力装置の縦断面図、第２図はパワーピスト
ンの復動完了時におけるプランジャ周辺の拡大縦断面図
、第３図はパワーピストンの復動中における第２図と同
様の縦断面図である。１・・・フロントバウシング、−２・・・リヤハウジン
グ、３川ハウジング、４・・・ダイヤフラム、５・・・
パワーピストン、７・・・定圧室、８・・・変圧室、９
・・・パワーピストンのバルブボディ（外周壁）、１０
・・・ガイドリング、１１・・・ダイヤフラム、１３・
・・反動板、１４・・・ブツシュロッド、１８・・・第
１の開閉弁、１９・・・第２の開閉弁、２０・・・プラ
ンジャ、２１・・・操作ロッド、２９，３１・・・連通
路、３．２・・・通　□路、３３・・・エアフィルタ、
３７・・・後退規制板、３８．３９・・・長孔、４０・
・・係止部材、４０ｂ・・・係止部材のストッパ部（先
端部）。The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the brake booster, Fig. 2 is an enlarged longitudinal cross-sectional view of the vicinity of the plunger when the power piston completes its return movement, and Fig. FIG. 3 is a longitudinal sectional view similar to FIG. 2 during the backward movement of the power piston. 1...Front bousing, -2...Rear housing, 3-way housing, 4...Diaphragm, 5...
Power piston, 7... Constant pressure chamber, 8... Variable pressure chamber, 9
...Power piston valve body (outer peripheral wall), 10
...Guide ring, 11...Diaphragm, 13.
...Reaction plate, 14... Bush rod, 18... First on-off valve, 19... Second on-off valve, 20... Plunger, 21... Operating rod, 29, 31... Communication passage, 3.2... passage □ passage, 33... air filter,
37...Retreat restriction plate, 38.39...Long hole, 40.
... Locking member, 40b... Stopper part (tip part) of the locking member.

Claims

[Scope of utility model registration request]

A power piston that presses the mask cylinder piston is reciprocally disposed within the housing, and a constant pressure chamber and a variable pressure chamber are formed in front and behind the power piston, and the constant pressure chamber and the variable pressure chamber are formed inside the power piston. A first on-off valve that opens and closes the nine communication passages between the variable pressure chamber and the atmosphere, and a second on-off valve that opens and closes the communication passage between the variable pressure chamber and the atmosphere are respectively provided.
In the brake booster, the first and second on-off valves are slidably disposed within the power piston and are controlled to open and close by advancing and retracting a plunger connected to a brake pedal via an operating rod, An insertion hole is formed in the outer circumferential wall of the power piston surrounded by the rear part of the housing, and a locking member is attached to the operating rod, and the tip of the locking member is inserted into the insertion hole to connect the power piston. When the parry piston moves back, the tip of the locking member abuts against the rear inner surface of the housing, and the operating rod and plunger are moved relative to the power piston. A brake booster characterized in that the brake booster is configured to move the first on-off valve forward, thereby reducing the opening degree of the first on-off valve.