CORNER-OPERATED DRUM BRAKE ACTUATION MECHANISM AND DRUM BRAKE COMPRISING SUCH A MECHANISM

摘要

P The invention relates to a wedge-operated drum brake actuation mechanism 20, comprising a fixed body 16, two opposite pistons 14, 15 sliding in the body 16 and cooperating with ends 9, 10 opposite two segments 2, 3 carrying linings, a wedge 20 movable in the body in a direction 22 transverse to the axis of the pistons and provided with two inclined surfaces 27, 28 cooperating with the pistons 14, 15, characterized in that the wedge comprises, on either side of said inclined surfaces 27, 28, two extensions 29, 30 with parallel faces 31, 32 and perpendicular to the axis of the pistons, and in that the body 16 comprises two guide grooves 33, 34 perpendicular to the axis of the pistons, the two extensions 29, 30 being slidably received in said guide grooves. /P