Lifter speed-reducing apparatus

An elevator speed-reducing apparatus of the utility model is composed of one or two stages of planetary gear sets and a wheel hub. The two stages of the planetary gear sets can be used to decrease the input revolution rate of the electromotion motor of an elevator and improve wringing force. In the first stage of the planetary gear set, a sun gear is taken as the dynamic input terminal of the motor, and the first stage of the planetary gear set is fixed around the gear, a planet bracket is connected with the second stage of a sun tooth as a power output end in order to reach the highest moderating ratio of the first stage of the planetary gear set. And an attachment planet bracket is used in the second stage of the planetary gear set, and the dynamic of the motor is made to be final output via the wheel hub of the elevator which is connected around the gear. The speed-reducing apparatus has the advantages of increasing structural strength, reducing volume and decreasing cost.