JPS60107641U

JPS60107641U - drum brake wheel cylinder

Info

Publication number: JPS60107641U
Application number: JP20007183U
Authority: JP
Inventors: 坂田　光夫
Original assignee: 豊生ブレ−キ工業株式会社
Priority date: 1983-12-27
Filing date: 1983-12-27
Publication date: 1985-07-22
Also published as: JPS645136Y2

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図は本考案の一実施例であるホイールシリンダを含
むドラムブレーキの一例を示す正面区である。第２図は
そのドラムブレーキに組み込まれたホイールシリンダの
平面図であり、第３図は第２図の縦断面図である。第４
図は第２図および第３図の要部を示す部分断面図であり
、第５図は第４図における右側面図である。第６図およ
び第７図は上記ホイールシリンダにおいて係合歯と係合
爪との係合態様をそれぞれ示す部分断面図である。第８
図は本考案の別の実施例の要部を示す簡略的な部分断面
図であり、第９図は本考案のストッパ部材の別態様を示
す図であり、さらに第１０図は本考案の別の実施例を示
す簡略的な断面図である。１０：バッキングプレート、１２ニブレーキシユー、１
４ニブレーキライニング、１８：ホイールシリンダ、２
０ニブレーキドラム、２２ニドラム内周面、２６：シリ
ンダ本体、２８：取付部、３０：アンカ部、３２ニジリ
ンダ部（上記２８〜３２からシリンダ本体２６が構成さ
れる。）、３４：開口部、３８：ピストン、４８ニスリ
ーブ、５０：係合歯、６６：ストッパ部材、６８ニスリ
ツト、７０：係合爪、Ｃ：クリアランス、ｔ：隙間。FIG. 1 is a front view showing an example of a drum brake including a wheel cylinder, which is an embodiment of the present invention. FIG. 2 is a plan view of a wheel cylinder incorporated into the drum brake, and FIG. 3 is a longitudinal sectional view of FIG. 2. Fourth
The figure is a partial sectional view showing the main parts of FIGS. 2 and 3, and FIG. 5 is a right side view of FIG. 4. FIGS. 6 and 7 are partial sectional views showing the manner in which the engaging teeth and the engaging claws engage with each other in the wheel cylinder. 8th
9 is a diagram showing another embodiment of the stopper member of the present invention, and FIG. 10 is a diagram showing another embodiment of the present invention. FIG. 10: Backing plate, 12 brake shoes, 1
4 Brake lining, 18: Wheel cylinder, 2
0 Ni brake drum, 22 Ni drum inner circumferential surface, 26: cylinder body, 28: mounting portion, 30: anchor portion, 32 Niji cylinder portion (the cylinder body 26 is composed of the above 28 to 32), 34: opening, 38: piston, 48 sleeve, 50: engaging tooth, 66: stopper member, 68 Ni slit, 70: engaging claw, C: clearance, t: gap.

Claims

[Claims for Utility Model Registration] A drum brake in which a pair of brake shoes supported by a backing plate performs a braking action by being pressed by a wheel cylinder against the inner peripheral surface of a brake drum that rotates together with the wheel, the wheel cylinder comprising: (1) a cylinder body fixed to the backing plate and having an opening at one end; (2) a piston slidably fitted to the cylinder body and protruding from the opening of the cylinder body; (3) a cylindrical sleeve fixed to the outside of the cylinder body parallel to the moving direction of the piston; (4) an opening peripheral edge of the sleeve on the opening side of the cylinder body;
a plurality of engaging teeth formed in a step-like shape so as to move further away from the opening of the cylinder main body as the circumferential direction progresses along the opening periphery; (5) having an annular umbrella shape; The sleeve is disposed inside the sleeve in a manner that expands toward the opening of the cylinder body, and a portion of the piston that protrudes from the opening is located between the brake shoe and the inner circumferential surface of the brake drum. (6) a stopper member that is operatively connected via a gap in the piston axial direction corresponding to the clearance and that defines the movement position of the piston in the return direction; a radial shape in a possible state, and is fitted into the inner circumferential surface of the sleeve in an elastically contracted state, and in a direction that moves away from the opening of the cylinder body as the clearance increases when the piston protrudes; a plurality of engaging pawls that are displaced in small increments and sequentially engaged with step-like engaging teeth of the sleeve one by one to define the position of the stopper member relative to the cylinder body; A drum brake wheel cylinder characterized by having the following structure.