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Introduction Of Electric Hoist(I)


Electric hoist is a special lifting equipment, installed in the crane, gantry crane above, electric hoist with small size, light weight, simple operation, easy to use and so on, for industrial and mining enterprises, warehousing, terminals and other places.

Electric hoist compact structure, the motor axis perpendicular to the drum axis of the electric hoist using worm gear device. Its shortcomings are: the length of large size, width of the size of large, stupid structure, low mechanical efficiency, processing more difficult. Hydraulic system for the double control, overflow control valve, magnetic contact pressure gauge can be precise control of the pressure. Electrical control department uses a low voltage control, increasing the security of the dominant system.

Composition structure

From the general weight of 0.3 to 80 tons, lifting height of 3 to 30 meters. By the motor, transmission and reel or sprocket composition, divided into wire rope electric hoist and electric chain hoist two. One chain electric hoist is divided into two kinds of imported and domestic; wire rope electric hoist single speed upgrade, two-speed upgrade; mini electric hoist, hoist, multi-function hoist.

Reducer, hoisting motor, running motor, broken firearms, cable sliding line, reel device, hook device, coupling, soft cable current introduction device and other power and braking force in one.

Weight: 0.25t-80t

Lifting height: 3m-30m

Working level: M3, M4

Running speed: 20 (30) m / min

Lifting speed: 8m / min

Installation is used

Electric hoist is generally installed in single-beam cranes, bridge cranes, gantry cranes, suspended cranes. A little modification, can also be used as a hoist. Therefore, it is to improve labor efficiency, improve the working conditions of the necessary machinery.

Operating conditions

Ambient temperature: -20 ℃ ~ +40 ℃

Working system: Intermediate JC25%

Heavy: JC40%

When the intermediate work system electric hoist from the weight reduction of 30%, that is, heavy work system JC40% of the electric hoist.

Heavy duty system JC40% of the electric hoist is used in the relatively heavy work, the load is often rated or require a high safety factor in the case.

Electric hoist structure reducer: the use of three fixed shaft helical gear rotation mechanism, gear and gear shaft with heat treated alloy steel, the box, the lid made of high quality cast iron, tight assembly, good sealing. Reducer into a component, loading and unloading is very convenient.

Control box: the use of emergency situations can be cut off the main circuit, and with the upper and lower stroke to protect the fire limit device device. To ensure the safe operation of electric hoist. Electrical components long life, the use of reliable.

Wire rope: lifting wire rope, including phosphate coating wire rope, galvanized steel wire rope and stainless steel wire rope, the implementation of the current national standard GB8918-2006 important use of wire rope, to ensure a durable.

Cone motor: hoisting motor with a larger starting torque cone-shaped rotor brake asynchronous motor, no need to add a brake. The motor duty cycle is 25%, the motor is rated B or F, motor protection class IP44 / IP54.

Button switch: hand operation lightweight and flexible, sub-rope manipulation and wireless remote control in two ways.

Electric hoist components are: motor, transmission, reel and sprocket.

The different positions of the motor and the drum can be divided into four types:

(1) motor shaft perpendicular to the drum axis of the electric hoist using worm gear, the width of the size of large, bulky structure, low mechanical efficiency, processing more difficult, there is no manufacturers to produce this type of product structure.

(2) electric motor shaft parallel to the drum shaft of the electric hoist, the advantages of height and length of small size. The shortcomings of the width of large size, grouping, manufacturing and assembly complex, large track radius.

(3) motor installed in the reel inside the electric hoist, the advantages of small size, compact structure. Its main drawback is the motor cooling conditions are poor, poor classification, inspection, installation, maintenance of the motor inconvenience, power supply device complex.

(4) Motor installed in the drum outside the electric hoist, the advantages of good grouping, generalization of a high degree of change in height to rise easily, easy installation and maintenance. Its shortcomings are large in length.