Drum brake device
AssigneeNisshinbo Industries, Inc.
InventorsSeiji Asai, Takashi Ikeda
Life of this patent
Estimating the term…
Abstract
A brake structure that prevents damaging the shoe-hold mechanism by way of securing a larger space at a central region of the brake and achieves a long effective and stable brake function. A by-pass hole 60d, through which the shoe-hold pin 41 is freely penetrating, is formed in the brake lever 60 positioned beneath the shoe web 20b of the brake shoe 20, and the stopper portion 60e contacting the shoe rim 20a is formed on the brake lever 60 so as to avoid the collision between the shoe-hold pin 41 and the by-pass hole 60d when the brake lever 60 is in operation.
Claims4
A drum brake device comprising a brake shoe being movably disposed parallel to a surface on a fixed back plate, a parking brake actuating lever superposed on a shoe web of the brake shoe, positioned between the back plate and the shoe web, but adjacent to the shoe web, a base end of which is pivotally supported at one end of the shoe web, a shoe hold mechanism, composed of a shoe-hold pin, rising from a back plate, and a shoe-hold spring, laid on the brake shoe, said shoe-hold pin contracting said shoe-hold spring so as to urge the brake shoe toward the back plate and to hold the brake shoe, and a remote control device which pulls a free end of said parking brake actuating lever to cause a frictional engagement between the brake shoe and a brake drum, wherein a by-pass hole, through which said shoe-hold pin freely penetrates, is formed in the parking brake actuating lever, and a stopper means, preventing the by-pass hole of the parking brake actuating lever from colliding against the shoe-hold pin in the parking brake actuating lever operational direction, is provided on the drum brake device.
Dependencies are inferred from the claim text.