Drum brake

Abstract

The drum brake includes: a drum configured to rotate together with a wheel; a pair of brake shoes positioned inside the drum and configured to move to an inner circumferential surface of the drum by a wheel cylinder; and a pad attached to an outer circumferential surface of each brake shoe and configured to rub against the inner circumferential surface of the drum when the brake shoe operates outward, wherein the brake shoe includes an expansion portion made of a material that expands thermally in a radial direction and configured to compensate a gap formed between the pad and the drum expanding thermally.

Dependencies are inferred from the claim text.