(1) The motor axis is perpendicular to the axis of the hoist drum using worm gear, large width aspect size, structure, heavy, low mechanical efficiency, more difficult process. Manufacturers currently have no such structure type of product.
(2)lift hoist parallel to the axis of the drum hoist, its
Advantages of small size, height and length. The disadvantage of a large width dimension, of the packet, manufacturing and assembly complexity. Track turning radius.
(3) The motor is mounted inside the drum hoist, the advantage of a small length dimensions, compact structure. Its main drawback is the motor cooling conditions are poor, poor groups, inspection, installation, maintenance, motor inconvenience, power supply unit complex.
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