BAND-AND-SHOE BRAKE WITH RADIALLY MOVABLE LININGS IN WHEEL Russian patent published in 2007 - IPC B66D5/10 F16D49/12 

FIELD: mechanical engineering; drawworks.

SUBSTANCE: proposed band-and-shoe brake contains brake wheel installed on drum, brake band, friction members, mechanical and pneumatic drives. Through ports are made in brake wheel over perimeter of its cylindrical surface in which friction members are fitted. Said friction members have form of equilateral trapezium in longitudinal section, with larger convex and smaller concave bases. Radial of curvature of bases correspond to curvature of mating surfaces, larger base projects over surface of wheel and smaller base rests on convex with flanging preventing falling out of friction member. Plate is formed into outer surface of torus rubber pneumatic chamber whose inner surface is arranged on cylindrical ring projection of drum flange and is fastened to it by unions of air pipelines.

EFFECT: improved efficiency of brake by balancing load on its friction units with possibility of control of value of summary brake torque in process of braking.

4 dwg