Drum brake
The present application relates to a drum brake, which includes a brake arm; a brake shoe; a base; and a brake torque detection device; the brake shoe is hinged on the brake arm through a brake shoe shaft, the brake arm is provided with a shaft hole penetrating through the brake shoe shaft, and the shaft hole is an oblong shaft hole, and a hole wall at one side of the oblong shaft hole is provided with a wear-resistant strip configured for pressing against the brake shoe shaft during braking of the drum brake; the brake torque detection device includes a sensing plate and a tension and compression sensor arranged on the sensing plate; one end of the sensing plate is connected to the brake shoe shaft, and the other end of the sensing plate is connected to the brake arm.
1. A drum brake, comprising:
a brake arm;
a brake shoe, hinged on the brake arm through a brake shoe shaft;
a base; and
a brake torque detection device;
wherein the brake arm is provided with a shaft hole penetrating through the brake shoe shaft, and the shaft hole is an oblong shaft hole, and a hole wall at one side of the oblong shaft hole is provided with a wear-resistant strip configured for pressing against the brake shoe shaft during braking of the drum brake; the brake torque detection device comprises a sensing plate and a tension and compression sensor arranged on the sensing plate; one end of the sensing plate is connected to the brake shoe shaft, and the other end of the sensing plate is connected to the brake arm; and
wherein a shaft sleeve is slidably sleeved on the brake shoe shaft, and the shaft sleeve is attached to the wear-resistant strip.
2. The drum brake according to claim 1 , wherein the sensing plate is vertically arranged, one end of the sensing plate is provided with a hole and is connected to the brake arm through a connection shaft, and the other end of the sensing plate is provided with a closed hole or a groove, the brake shoe shaft passes through the closed hole or the groove, and an axle center of the brake shoe shaft is located at a center position along a length direction of the oblong shaft hole under a static state.
3. A drum brake, comprising:
a brake arm;
a brake shoe, hinged on the brake arm through a brake shoe shaft;
a base; and
a brake torque detection device;
wherein the brake arm is provided with a shaft hole penetrating through the brake shoe shaft, and the shaft hole is an oblong shaft hole; the brake arm is provided with a support plate, and a plate surface of the support plate is provided with a through hole, a hole diameter of the oblong shaft hole is within a diameter range of the through hole, and a hole edge of the through hole on the support plate is provided with a wear-resistant strip that presses against the brake shoe shaft during braking of the drum brake; the brake torque detection device comprises a sensing plate and a tension and compression sensor arranged on the sensing plate; one end of the sensing plate is connected to the brake shoe shaft, and the other end of the sensing plate is connected to the brake arm; and
wherein a shaft sleeve is slidably sleeved on the brake shoe shaft, and the shaft sleeve is attached to the wear-resistant strip.
4. The drum brake according to claim 3 , wherein the sensing plate is vertically arranged, one end of the sensing plate is provided with a hole and is connected to the brake arm through a connection shaft, and the other end of the sensing plate is provided with a closed hole or a groove, the brake shoe shaft passes through the closed hole or the groove, and an axle center of the brake shoe shaft is located at a center position along a length direction of the oblong shaft hole under a static state.
5. The drum brake according to claim 3 , wherein an outer surface of the support plate is provided with a fixing sheet configured to block the wear-resistant strip.
6. The drum brake according to claim 3 , wherein the brake arm is hinged on the base through an articulated shaft, a lower end of the sensing plate is connected to the articulated shaft, and an upper end of the sensing plate is connected to the brake arm.
7. A drum brake, comprising:
a brake arm;
a brake shoe;
a base; and
a brake torque detection device;
wherein the brake arm is hinged on the base through an articulated shaft, the brake arm is provided with a shaft hole penetrating the articulated shaft, and the shaft hole is an oblong shaft hole; a hole wall at one side of the oblong shaft hole is provided with a wear-resistant strip configured for pressing against the articulated shaft during braking of the drum brake; the brake torque detection device comprises a sensing plate and a tension and compression sensor arranged on the sensing plate; a lower end of the sensing plate is connected to the articulated shaft, and an upper end of the sensing plate is connected to the brake arm; and
wherein a shaft sleeve is slidably sleeved on the brake shoe shaft, and the shaft sleeve is attached to the wear-resistant strip.