Wedge drum brake of a vehicle
OwnerChong-Chul Chuninventor
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Abstract
A wedge drum brake of vehicles is disclosed. A pair of pistons of a wheel cylinder are pushed out by a vertically descending wedge to make a leading shoe and a trailing shoe press against an inner circumference of a drum 10, wherein the wedge has a larger inclined angle on the side of the trailing shoe compared to the inclined angle on the side of the leading shoe and the end surfaces of the pistons facing both sides of the wedge have correspondingly different inclined angles, thereby reinforcing the expanding force of the trailing shoe so that the leading and trailing shoes have the same degree of expanding force.
Claims8
A wedge drum brake, with a wedge that causes first and second pistons of a wheel cylinder to be pushed out and press a leading shoe and a trailing shoe against an inner circumference of a drum, wherein said wedge has a larger inclined angle on the side of said trailing shoe compared to the inclined angle on the side of the leading shoe.
A drum brake, comprising:
- first and second pistons;
- a drum;
- a wedge with first and second sides, wherein the wedge is dimensioned and configured to exert different forces against the first and second pistons upon movement of the wedge;
- a leading shoe and lining, said first piston acting against said leading shoe and lining causing a leading braking force against the drum;
- and
- a trailing shoe and lining, said second piston acting against said trailing shoe and lining causing a trailing braking force against the drum, wherein:
- the different forces exerted by the wedge against the first piston and the second piston make a the leading braking force substantially equal to the trailing braking force.
Dependencies are inferred from the claim text.