JPS6318639U

JPS6318639U -

Info

Publication number: JPS6318639U
Application number: JP11173786U
Authority: JP
Priority date: 1986-07-21
Filing date: 1986-07-21
Publication date: 1988-02-06
Also published as: JPH032026Y2

Description

[Brief explanation of the drawing]

第１図は第２図の―視断面の要部を示す図
である。第２図は本考案が適用されたシユー間隙
自動調節装置を備えたドラムブレーキの要部を示
す正面図である。第３図は第２図の―視断面
の要部を示す図である。１２，１４：ブレーキシユー、２６：シユーウ
エブ、３４：係合歯、３６：アジヤストレバー、
４０：掛止歯、４２：アジヤストラツチ、４４：
ピン、４６：トーシヨンスプリング、４８：スト
ラツト、５８：嵌合穴、６４：コイル部、６６，
６８，７４：係合部。 FIG. 1 is a diagram illustrating a main part of a cross section taken along the line "-" in FIG. FIG. 2 is a front view showing the main parts of a drum brake equipped with an automatic shoe gap adjustment device to which the present invention is applied. FIG. 3 is a diagram illustrating a main part of a cross section taken along the line "-" in FIG. 2. 12, 14: Brake shoe, 26: Shoe web, 34: Engagement tooth, 36: Adjust lever,
40: Latch tooth, 42: Asia strap, 44:
Pin, 46: Torsion spring, 48: Strut, 58: Fitting hole, 64: Coil part, 66,
68, 74: Engagement portion.

Claims

[Claims for Utility Model Registration] In a drum brake of the type in which a pair of brake shoes that are moved toward and away from each other are supported from the inner circumferential side by a strut that spans between the shoe webs of the brake shoes, an adjustment lever having matching teeth, rotatably attached to one shoe web of the brake shoe and engaged with one end of the strut; and a fitting provided on the shoe web of the one brake shoe. A pin whose one end is loosely fitted into a matching hole and is prevented from coming out, and a pin having a latch tooth at the tip and rotatably attached to the other end side of the pin, and a pin that is rotatably attached to the engagement tooth of the adjuster lever. An adjusting stretch that prevents the adjusting lever from rotating in the direction of expanding the shoe gap by engaging with the latch teeth, but allows rotating in the direction of reducing the shoe gap, and an adjusting lever that forms a predetermined angle with respect to the coil portion and both ends thereof. and a pair of extending engaging portions, which are attached to the tip of the other end of the pin in the coil portion, one of the engaging portions is engaged with the adjuster strap, and the other of the engaging portions is connected to the brake. an automatic shoe gap adjustment device that automatically adjusts the shoe gap, comprising a torsion spring that constantly biases the adjuster strap in a rotational direction in which it engages with the adjuster lever when engaged with the shoe; A biasing force that biases the engagement position between the other engaging portion of the torsion spring and the one brake shoe in a direction in which the latch tooth side of the adjuster strap approaches the shoe web of the one brake shoe is provided. An automatic shoe gap adjustment device for a drum brake, characterized in that the shoe gap is set at a position where the shoe gap occurs.