The electric hoist for wire rope suspended platform is mainly consists of electric motor, main brake and auxiliary brake, reducer, rope wheel and pressure rope mechanism.
The hoist motor torque should not be lower than 180% of the rated torque, and the rope can not be jammed. All rotating exposed parts shall be provided with a hood or protective device.
The brake must be suspended with a rated load of 125% and stop operation within a slip distance of no more than 100mm.
The ratio between the diameter of the rope wheel and the diameter of the steel wire rope should not be less than 20. Under static test load, the brake works15 min and the slip distance is no more than 10mm. It must be equipped with manual sliding device to make the suspension drop smoothly when the power is cut off.