Introduction to the control circuit and maintenance of electric hoist

Electric hoist is a small weight, simple structure of a kind of hoisting machinery, widely used in industrial enterprises in the lifting installation of small equipment, has small occupied area is small, convenient use, etc. Electric hoist have two hoisting mechanism and a mobile device, structure associated with each other, they are all have Manual block own motor drive. Electric hoist lifting and lowering is motor driven by gear box for car motor through the role of the idler pulley, walking back and forth on the h beam movement, rising and falling, by line with limit switch to control the itinerary. Commonly used electric hoist are: 2 t, 3 t, 5 t with conical rotor motor, motor stator and rotor are tapered, after electrify with the establishment of the magnetic field and rotor shaft Hoist and trolley the fan wheel to overcome the spring force to produce axial movement, fan wheel conical brake ring out of the back cover, out of control, the rotor of the motor can operate freely, cone-shaped brake laps in the spring when the power is cut off, and back cover tightly closed to control the braking of electric hoist motor circuit consists of: circuit breaker, contactor, transformer, terminal, control handle button, thermal relay, wires, slide wire cable (mobile), and other electrical components.