JPS5879140U

JPS5879140U - Vehicle drum brake

Info

Publication number: JPS5879140U
Application number: JP17482581U
Authority: JP
Inventors: 金子　久教
Original assignee: トヨタ自動車株式会社
Priority date: 1981-11-25
Filing date: 1981-11-25
Publication date: 1983-05-28
Also published as: JPS621461Y2

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]

第１図は本考案に係る車両用ドラムブレーキの側面図、
第２図は同要部拡大断面図である。符号の説明、１１・・・ブレーキシュー、１１ａ・・・
上端部、１１ｂ・・・下端部、１２・・・バッキングプ
レート、１３・・・アンカーピン、１４・・・ホイルシ
リンダ、１５・・・アンカーシリンダ、１６・・・ホイ
ルシリンダピストン、１７・・・ブレーキドラム、１８
゜１９・・・アンカーシリンダピストン、Ｒ，、Ｒ２・
・・液室、Ｐ・・・通路、■・・・開閉弁、Ａ・・・ド
ラムブレーキ。FIG. 1 is a side view of a vehicle drum brake according to the present invention;
FIG. 2 is an enlarged sectional view of the same main part. Explanation of symbols, 11...brake shoe, 11a...
Upper end, 11b... Lower end, 12... Backing plate, 13... Anchor pin, 14... Foil cylinder, 15... Anchor cylinder, 16... Foil cylinder piston, 17... brake drum, 18
゜19...Anchor cylinder piston, R,, R2・
...Liquid chamber, P...Passage, ■...Opening/closing valve, A...Drum brake.

Claims

[Scope of utility model registration request]

A pair of arc-shaped brake shoes that are expandably assembled to a backing plate and can be slidably connected to a brake drum; an anchor that is fixed to the backing plate between one end of these brake shoes and that can hold one end of each brake shoe; and a foil cylinder to which hydraulic pressure from the master cylinder is applied; and a wheel cylinder that is slidably assembled to the foil cylinder and engaged with one end of each of the brake shoes, so that the wheel cylinder is moved from the master cylinder into the foil cylinder. a pair of foil cylinder pistons that expand each of the brake shoes when a hydraulic pressure of an anchor cylinder having a pair of inner holes, each of which is slidably assembled into each of the inner holes of the anchor cylinder to form a liquid chamber, and which engages with the other end of each of the brake shoes; A drum brake for a vehicle, comprising an anchor cylinder piston, a passage that communicates the two liquid chambers formed by these anchor cylinder pistons, and an on-off valve that is provided in the passage and opens and closes communication between the two liquid chambers. .