JPS63128338U

JPS63128338U -

Info

Publication number: JPS63128338U
Application number: JP2097587U
Authority: JP
Priority date: 1987-02-16
Filing date: 1987-02-16
Publication date: 1988-08-22

Description

[Brief explanation of the drawing]

第１図は本考案が適用されたドラムブレーキの
一例を示す図であつて、要部を示す断面図である
。第２図は第１図のバイメタルを底壁外表面側か
ら見た拡大図である。第３図は第２図の―視
断面図である。２０：回転ドラム、２２：底壁、２４：周壁、
２６：ブレーキシユー、３０：貫通穴、３２：バ
イメタル。 FIG. 1 is a diagram showing an example of a drum brake to which the present invention is applied, and is a sectional view showing the main parts. FIG. 2 is an enlarged view of the bimetal shown in FIG. 1 viewed from the outer surface of the bottom wall. FIG. 3 is a cross-sectional view taken from FIG. 2. 20: rotating drum, 22: bottom wall, 24: peripheral wall,
26: Brake shoe, 30: Through hole, 32: Bimetal.

Claims

[Claims for Utility Model Registration] (1) Comprising a bottom wall and a peripheral wall protruding from the outer periphery of the bottom wall in a direction parallel to the axis, forming a cylindrical shape with a bottom;
A drum brake including a rotating drum whose rotation is suppressed by pressing a brake shoe against the inner circumferential surface of the circumferential wall, wherein a through hole is provided in at least one of the bottom wall and the circumferential wall of the rotating drum; A bimetal is attached to the periphery of the through hole, which is normally covered in a substantially tight state, but which opens the through hole when the temperature of the rotating drum exceeds a predetermined temperature due to braking. Features a drum brake. (2) The drum brake according to claim 1, wherein the bimetal is provided on the outer surface of the rotating drum. (3) The drum brake according to claim 2, wherein the bimetal is fixed to the periphery of the through hole at one end opposite to one rotational direction of the rotating drum.