electric wire rope hoist structural features

part of the electric wire rope hoist are: motor, transmission, drum and wire rope. The mutual position of the motor and the spool can be roughly divided into four different types.
Motor axis is perpendicular to the axis of the reel hoist using worm gear, large width aspect size, structure,electric wire rope hoist bulky, low mechanical efficiency, more difficult process. Manufacturers have no such structural type of product.
Motor axis is parallel to the roll axis of the electric hoist, the advantage of height and length of the small size. Its disadvantage is that the large width dimension, the packet of the manufacturing and assembly complexity. Track turning radius.
Motor mounted on the reel inside the electric hoist, the advantage is the length of the small size and compact structure. Its main drawback is the motor cooling conditions are poor, poor grouping,electric wire rope hoists inspection, installation, maintenance, motor inconvenience, power supply unit complex.
Motor mounted on the outside of the drum hoist, the advantage is for the grouping is good, high degree of common, easily changing the lift height for easy installation and maintenance. Its disadvantages are: the length of the large size.