Mini electric hoist is a kind of special lifting equipment, installed on the crane, gantry crane. And with electric hoist with small size, light weight, simple operation, easy to use and so on.
The lifting capacity is generally 0.3 to 80 tons and the lifting height is 3 to 30 meters. By the motor, transmission mechanism and reel or sprocket composition. And divided into wire rope electric hoist and chain electric hoist two kinds.
According to the different position of the motor and the drum, it has four types:
- The electric hoist with the motor axis perpendicular to the reel axis adopts the worm gear transmission device, the width dimension is large, the structure is bulky, the mechanical efficiency is low, the processing is more difficult, and there is no manufacturer to produce this structural type of product.
- The motor axis is parallel to the axis of the reel of the electric hoist, which has the advantage of small height and length. Its disadvantages are large width size, grouping, complex manufacturing and assembly, and large turning radius of track.
- The electric hoist with the motor installed in the reel has the advantages of small length and compact structure. Its main disadvantages are poor motor heat dissipation conditions, poor grouping, inconvenient inspection, installation and maintenance of motor, and complicated power supply device.
- The electric hoist with the motor mounted on the outside of the drum has the advantages of good grouping, high degree of generalization, easy to change the lifting height, and convenient installation and maintenance. Its disadvantage is the large length size.
How does the electric hoist work?
The sprocket of the electric chain hoist can suspend on the walking trolley. And the trolley can walk on the I-beam of electric hoist. While the electric hoist can also work with large lifting equipment such as gantry cranes. A tapered rotor motor at one end of the electric hoist transmits power to a reducer at the other end of a electric hoist through a spline sleeve and a transmission shaft.
After the deceleration of power, transmission to the middle of the wire rope drum. Electric hoist by wire rope and hook for electric hoist operation, this motor has a brake function. Most electric hoists are operated by people using buttons on the ground. It can also be operated in the driver’s room or by wired and wireless remote control.