Patent ID: 6766887
Filing Date: 2004-07-27
Classification: F16D

Abstract:
A dual mode type drum brake device comprising:first and second brake shoes facing each other and mounted on a back plate; a service brake actuator positioned between adjacent upper ends of the first and second brake shoes; an anchor positioned between adjacent lower ends of the first and second brake shoes; a shoe clearance adjustment device extended between the first and second brake shoes adjacent to the service brake actuator; a parking brake actuator positioned adjacent to the anchor; and a pivot lever pivotally mounted on the first brake shoe, an upper side and a lower side of the pivot lever engage with the shoe clearance adjustment device and the parking brake actuator respectively, wherein the parking brake actuator comprises a first brake lever, second brake lever and strut, the first brake lever has a first proximal portion pivotally supported on a portion between both ends of the second brake shoe; the second brake lever has a second proximal portion pivotally supported on a lower end portion of the second brake shoe; a first free end of the first brake lever and a second free end of the second brake lever extend so as to be substantially parallel and facing each other; the second free end of the second brake lever functionally engages with the first brake lever between the first proximal portion and the first free end thereof; the strut extends between the second brake lever at a portion between two ends thereof and the lower side of the pivot lever; and a brake cable to be pulled to activate the first free end of the first brake lever is arranged adjacent to the anchor and extended toward the first brake shoe side.