JPS58182027U

JPS58182027U - Automatic adjustment device for hydraulically operated drum brakes

Info

Publication number: JPS58182027U
Application number: JP8005782U
Authority: JP
Inventors: 福沢　源一郎; 出沢　功
Original assignee: 日信工業株式会社
Priority date: 1982-05-31
Filing date: 1982-05-31
Publication date: 1983-12-05
Also published as: JPS6121623Y2

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すドラムブレーキの要部縦
断全体正面図、第２図は第１図の■−■線拡線断大断面
図る。Ａ・・・自動調整装置、２．２′・・・ホイールシリン
゛ダ、３．　３’・・・ブレーキシュー、４・・・シリ
ンダ本体（第１部材）、５・・・油圧室、６・・・ピス
トン（第２部材）、１０．１０’・・・戻しばね、１５
・−・当接面、１６・・・調節ナツト、１７・・・ばね
、１８・・・調節杆、１９・・・早ねじ、２０・・・ク
ラッチ体、２１・・・クラッチ孔、２２・・・固定クラ
ッチ面、２４・・・固定クラッチ体、２６・・・回止め
ピン、２８・・・ストッパ孔、３０・・・ストッパ部材
としてのストッパボルト。FIG. 1 is a front view of the main parts of a drum brake according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along the line ■--■ in FIG. A... Automatic adjustment device, 2. 2'... Wheel cylinder, 3. 3'... Brake shoe, 4... Cylinder body (first member), 5... Hydraulic chamber, 6... Piston (second member), 10.10'... Return spring, 15
... Contact surface, 16... Adjustment nut, 17... Spring, 18... Adjustment rod, 19... Quick screw, 20... Clutch body, 21... Clutch hole, 22... ...Fixed clutch surface, 24...Fixed clutch body, 26... Rotating pin, 28... Stopper hole, 30... Stopper bolt as a stopper member.

Claims

[Scope of utility model registration request]

The first and second members defining the hydraulic chamber of the wheel cylinder are disposed so as to be non-rotatable and slidable relative to each other, and the brake shoe is actuated by the separating action of the two members due to the hydraulic pressure supplied to the hydraulic chamber. An automatic adjustment device for a hydraulically operated drum brake configured to operate the first and second brakes.
an adjustment nut that is non-rotatably supported by one of the members and comes into contact with a contact surface provided on the one member in a separable manner; and the adjustment nut is biased toward contact with the contact surface. a spring, an adjusting rod screwed into the adjusting nut via a quick screw, and the adjusting rod is fixed to one end and is rotatable in a clutch hole provided in the other member of the first and second members. It consists of a movable clutch body that slides together and cooperates with a fixed clutch surface provided in the clutch hole, and the movable clutch body receives thrust toward the fixed clutch surface by hydraulic pressure of a certain value or more in the hydraulic pressure chamber. When the fixed clutch surface is thrust toward the fixed clutch surface by the return spring of the plexi knee, the fixed clutch surface is frictionally coupled to the movable clutch body. An automatic adjustment device for a hydraulically operated drum brake, characterized in that the fixed clutch body is formed to slide into the clutch hole so as to move forward and backward, and the fixed clutch body is held at a predetermined forward position by a removable stopper member. .゛