US 12,404,907 B2
Drum brake
Zhengfang Han, Shijiazhuang (CN); Wulin Han, Shijiazhuang (CN); Bo Wang, Shijiazhuang (CN); Xiangle Qiao, Shijiazhuang (CN); Yan Zhao, Shijiazhuang (CN); Dejun Cui, Shijiazhuang (CN); and Guoqi Liu, Shijiazhuang (CN)
Assigned to SHIJIAZHUANG WULONG BRAKE CORPORATION, Hebei (CN)
Appl. No. 18/028,248
Filed by SHIJIAZHUANG WULONG BRAKE CORPORATION, Shijiazhuang (CN)
PCT Filed Mar. 11, 2022, PCT No. PCT/CN2022/080305
§ 371(c)(1), (2) Date Mar. 24, 2023,
PCT Pub. No. WO2022/213771, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 202110379964.1 (CN), filed on Apr. 8, 2021.
Prior Publication US 2023/0375059 A1, Nov. 23, 2023
Int. Cl. F16D 55/224 (2006.01); F16D 49/16 (2006.01); F16D 66/00 (2006.01)
CPC F16D 66/00 (2013.01) [F16D 49/16 (2013.01); F16D 2066/005 (2013.01)] 7 Claims
OG exemplary drawing
 
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.