DRUM-TYPE BLOCK BRAKE AND BRAKE BLOCK Russian patent published in 2007 - IPC F16D51/14 

FIELD: mechanical engineering; drum-type brakes.

SUBSTANCE: proposed drum-type brake has shield, brake blocks with friction linings, hold-down device and elastic return device which moves the brake block away from the drum after applying the brake; brake block moves at sliding in radial direction between two guide walls secured on shield. Hold-down device is made in form of lever articulated to shield. Reaction force F_r arising at braking is applied to hold-down lever and braking force F_br is applied to brake block in such way that braking force F_br and reaction force F_r act at two different points of brake. Brake block for drum-type block brake has rigid base for friction lining whose external ends form support for circumferential rest of brake block against guide walls; it moves over them at radial sliding. Located on outer surface of rigid base is friction lining which is secured to base.

EFFECT: facilitated procedure of replacement of brake blocks; enhanced stability of braking torque.

17 cl, 9 dwg