Dual-redundancy type hoisting mechanism

A dual-redundancy type hoisting mechanism comprises two winding drum sets, the two winding drum sets are both coaxially connected with the output end of a speed reducer, the output ends of the two speed reducers are coaxially connected through a drum-shaped coupler, the input ends of the two speed reducers are both connected with a power mechanism, the power mechanism comprises motors, output shafts of the two motors are coaxially connected through a torque coupler, and the output shafts of the two motors are coaxially connected through a transmission shaft. An output shaft of the motor is fixedly connected with a fixed pulley block, a brake and the input end of a speed reducer in sequence. Compared with the prior art, the dual-redundancy type hoisting mechanism has the advantages that the dual-redundancy type hoisting mechanism is provided with the two couplings, if one of the couplings breaks down, the other one of the couplings can keep the synchronism of the two winding drum sets, and the safety of a ladl