JPS6374535U

JPS6374535U -

Info

Publication number: JPS6374535U
Application number: JP16869586U
Authority: JP
Priority date: 1986-10-31
Filing date: 1986-10-31
Publication date: 1988-05-18
Also published as: JPH032017Y2

Description

[Brief explanation of drawings]

第１図は第２図の―視断面の要部拡大図で
ある。第２図は本考案が適用されたシユーホルド
ダウン装置を備えたドラムブレーキの一例を示す
正面図である。第３図は従来のシユーホルドダウ
ン装置を備えたドラムブレーキの要部を示す図で
あつて、第１図に相当する図である。１０：バツキングプレート、１２，１４：シユ
ーウエブ、１６，１８：ブレーキシユー、２０，
２２：シユーホルドダウン装置、４２：頭部、４
６：シユーホルドダウンピン、５０，５１：カツ
プ、５２：コイルスプリング、５６：切欠、５８
：貫通穴、６０：係合爪、６２：当接部。 FIG. 1 is an enlarged view of a main part of a cross section taken along the line - in FIG. 2. FIG. 2 is a front view showing an example of a drum brake equipped with a shun hold down device to which the present invention is applied. FIG. 3 is a diagram showing the main parts of a drum brake equipped with a conventional shun hold down device, and corresponds to FIG. 1. 10: Bucking plate, 12, 14: Show web, 16, 18: Brake show, 20,
22: Shuhold down device, 42: Head, 4
6: Shuhold down pin, 50, 51: Cup, 52: Coil spring, 56: Notch, 58
: Through hole, 60: Engagement claw, 62: Contact part.

Claims

[Claims for Utility Model Registration] A shew web having an arcuate shape and having a notch that opens toward the inner circumference in the middle part in the longitudinal direction, and a through hole formed at a predetermined position on the outer circumferential side of the notch. a pair of brake shoes each having; a shoe hold down pin that is swingably attached to the bucking plate at one end, has an intermediate portion inserted through the notch of the shoe web, and has a head at the other end; a first cup located on the head side and a second cup located on the shew web side, which are disposed between the head and the shew web with the shew hold down pins inserted therethrough; a shoe hold-down device having a coil spring interposed between the cups with a predetermined preload applied thereto, and supporting the brake shoe on the bucking plate in a state in which the brake shoes can be mutually expanded; In the drum brake, the second cup is inserted into the second cup so as to extend from the outer peripheral edge toward the backing plate and protrude a predetermined distance into the through hole, and is engaged with the through hole on the inner peripheral side of the shew web. An engaging pawl that can be engaged is provided at a protruding end of the engaging pawl, extending toward the inner circumferential side of the shew web, at least at a position where the engaging pawl engages with the inner circumferential side of the shew web of the through hole. . A shoe hold down device for a drum brake, characterized in that a contact portion is provided that can come into contact with a surface of the shoe web opposite to the side on which the second cup is provided.