Drum brake assembly with friction plate wear limit alarming

• Main Authors: WANG QIDONG, CHENG SHISHUN, JIANG WUHUA, REN YI, HUANG XINLIN, NIU JIAZHONG
• Format: Patent
• Language: Chinese; English
• Published: 23.04.2014
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model discloses a drum brake assembly with friction plate wear limit alarming. The drum brake assembly comprises a leading shoe, and a leading friction plate mounted on the leading shoe, wherein a wear alarm is mounted on the leading shoe friction plate, the positive electrode of the wear alarm is connected with a first external power source while the negative electrode is connected with a negative input end of a comparator, the first external power source is connected with the negative input end of the comparator through a first resistor, a positive input end of the comparator is connected with a second external power source through a second resistor, an output end of the comparator is connected with a positive electrode of an indicator light, a negative electrode of the indicator light is connected to the ground, the output voltage of the first external power source and the output voltage of the second external power source are the same, the resistance of the first resistor is larger than that o