JPS63146236U

JPS63146236U -

Info

Publication number: JPS63146236U
Application number: JP3896387U
Authority: JP
Priority date: 1987-03-17
Filing date: 1987-03-17
Publication date: 1988-09-27
Also published as: JPH0318751Y2

Description

[Brief explanation of the drawing]

第１図は第２図のＩ―Ｉ視断面の要部を示す拡
大図である。第２図は本考案が適用されたドラム
ブレーキの要部を示す正面図であつて、回転ドラ
ムを省略して示す図である。第３図は従来のドラ
ムブレーキの要部を示す断面図であつて、第１図
に相当する図である。１０：バツキングプレート、１２，１４：ブレ
ーキシユー、２０，２２：シユーリム、２４，２
６：シユーウエブ、２８，３０：ライニング、３
６：パーキングブレーキレバー、４０：ストラツ
ト、４８：回転ドラム、５０：内周面、５２，５
４：外周面。 FIG. 1 is an enlarged view showing a main part of a cross section taken along line II in FIG. 2. FIG. 2 is a front view showing the main parts of a drum brake to which the present invention is applied, with the rotating drum omitted. FIG. 3 is a sectional view showing essential parts of a conventional drum brake, and corresponds to FIG. 1. 10: Bucking plate, 12, 14: Brake shoe, 20, 22: Shoe rim, 24, 2
6: Sheuweb, 28, 30: Lining, 3
6: Parking brake lever, 40: Strut, 48: Rotating drum, 50: Inner peripheral surface, 52,5
4: Outer peripheral surface.

Claims

[Claims for Utility Model Registration] A bucking plate having a band-shaped and arcuate sew rim, a sew web protruding from the inner peripheral surface of the sew rim, and a lining fixed to the outer periphery of the sew rim, respectively. a pair of brake shoes disposed so as to be able to expand with respect to each other; and a parking space rotatably provided at one end on one of the brake shoes and on a surface of the shoe web on the bucking plate side. a brake lever, and a strut spanning between an intermediate portion of the parking brake lever and the other shoe web of the brake shoe, the strut having a cylindrical shape with a bottom, and an inner circumferential surface of which is aligned with an outer circumferential surface of the brake shoe. and a rotary drum provided so as to be able to rotate relative to the brake shoe while facing the brake shoe, and as the parking brake lever is rotated in the direction of brake operation, the brake shoe is rotated through the strut. In a drum brake of a type in which braking is performed by spreading the linings apart and pressing the outer circumferential surface of the lining against the inner circumferential surface of the rotating drum, the outer circumferential surface of the lining of the brake shoe is spaced apart from the bucking plate. The bucking plate is inclined in the inner circumferential direction, and the inner circumferential surface of the rotary drum is inclined in the inner circumferential direction of the backing plate at an inclination angle similar to that of the outer circumferential surface of the lining as the distance from the backing plate increases. Drum brakes with a unique feature.