A typical rail clamp comprises a pair of levers, provided with a brake shoe at the lever's first end to apply a clamping force, and a toggle mechanism or a cam follower at the lever's second end to apply an actuating force. When the rail is worn, due to the construction of the existing lever brake shoes, which create an angle to the rail surface when engage, the lever ratio and the clamping force decrease. The invention provides a novel and improved lever brake shoe assembly. It comprises: a lever; a cylindrical shoe block housing at the first lever's end; a cylindrical shoe holder, allowing rotation; a serrated shoe brake pad, mounted to the shoe holder. When the rail size varies, the cylindrical shoe holder rotates until the engaging pad surface becomes parallel to the rail surface, maintaining the clamp lever ratio constant and thereby a constant clamping force.
CONSTANT FORCE LEVER BRAKE SHOE ASSEMBLY FOR RAIL CLAMPS
PATIN DE FREIN A LEVIER A FORCE CONSTANTE POUR PINCE D'ANCRAGE
2015-06-04
Patent
Electronic Resource
English
WIND ACTIVATED BRAKE SHOE ASSEMLY FOR RAIL CLAMPS AND PUSH DOWN RAIL BRAKES
European Patent Office | 2016