Drum brake device

摘要

A drum brake device of the leading-trailing (LT) type is provided having a duo-servo effect when the parking brake is applied. First and second brake shoes (2, 3) are mounted between an actuator cylinder (8) at one end and an anchor block (9) at the other ends of the brake shoes (2, 3). A shoe clearance adjustment device (12) is provided between first adjacent ends of the brake shoes (2, 3) adjacent the actuator cylinder (8). The parking brake actuator means (18) are disposed between the second adjacent ends of the brake shoes (2, 3) adjacent the anchor block (9). The parking brake actuator means are provided with stroke adjustment means (13'a) for adjusting the length of the stroke travelled by the parking brake actuator means (18) when applying the parking brake. <IMAGE>