CD, MD type electric hoist is composed of three parts: lifting mechanism, operating mechanism and electric control.

1.Lifting mechanism The lifting mechanism is composed of four devices: drive, brake, transmission and winding. The driving and braking device is a squirrel cage conical brake motor, that is, the rotor and stator of the motor are conical structure, and the brake is also composed of conical brake ring and conical brake wheel. The lifting motor of MD hoist is double electric unit type, and the speed ratio is 1:10 through the gear reduction between the two motors. The transmission device is a four-stage cylindrical gear reducer; The taking device is composed of hook, wire rope, reel, etc.

The overall layout is that the drum is in the middle, one end is a conical brake motor, the other end is a reducer, and the motor shaft is connected with the reducer through the long shaft and the rubber coupling. The drum shell is cylindrical, and there are suspension rows and fixed shapes.

2.The operating mechanism is also known as the hoist car, by the drive, brake, transmission and wheel four devices, the driving brake device is a two-in-one squirrel cage cone brake motor, the brake is a flat brake; The drive gear reducer is an open and closed cylindrical gear drive, and the open gear low speed stage is composed of direct milling teeth on the wheel rim; The wheels are single-rim steel wheels with approximately conical treads.

The running car has manual, chain and electric points.

3.The electric control adopts two sets of standard magnetic starter, one set controls the positive and negative rotation of the lifting motor, that is, rise and fall; A set of control running motor positive and negative rotation, that is, left and right transverse. Operation control is the use of manual button, the operating voltage is 380V, in order to safety some have used a low voltage 36V, in order to prevent chaos, the drum is provided with a rope guide, the rope guide lateral movement with the lifting limit switch action, to control the lifting limit position.