Patent ID: 6408994
Filing Date: 2002-06-25
Classification: F16D

Abstract:
A drum brake comprising:a pair of brake shoes opposedly arranged inside a drum; an operating force producing mechanism for driving a power lever constituting an output portion of a shoe operating force by an electric motor; link mechanism, for driving said brake shoes, including an input lever for receiving the shoe operating force outputted from said power lever, wherein said link mechanism presses said brake shoes to a drum and operates a brake restricting force to said input lever in a direction of a reducing operation of the shoe operating force in accordance with a brake force operated from said brake shoes to an anchor portion for controlling a press force of said brake shoes to said drum; a damper spring between said power lever and said input lever, for transmitting the shoe operating force outputted from said power lever to said input lever and for absorbing an impact force transmitted from said brake shoes to said power lever via said link mechanism in braking.