Electric hoist for single-beam crane

Abstract

The invention belongs to the technical field of hoisting, and particularly relates to an electric hoist for a single-beam crane. The electric hoist comprises a lifting mechanism speed reducer, a winding drum component, a lifting mechanism electric motor and an operation mechanism speed reducer, wherein a motor shaft is rotationally connected in an electric motor box body, and the motor shaft is insliding connection with a rotor through a spline; the motor shaft is fixedly connected with a first input shaft through an elastic sleeve pin coupling, and an opening is formed in the motor shaft; athird spring is fixedly connected to each of the two ends of the rotor, the rotor is fixedly connected in the electric motor box body which is connected with a machine frame through a screw, a fan brake wheel is fixedly connected to a support ring, a brake ring is fixedly connected to the electric motor box body, and the brake ring is made of a flexible material; one end of a movable shaft is fixedly connected with the rotor, the other end of the movable shaft is fixedly connected with the support ring, and the movable shaft is slidably connected in the opening; a sliding chute is arranged onone side of the elastic sleeve pin coupling, a sliding plate is slidably connected in the sliding chute, and the sliding plate is fixedly connected with the bottom of the sliding chute through a fourth spring; and the end surface of the sliding plate is in contact with the inner wall of a winding drum, so that the safety of the electric hoist is enhanced.

Description

technical field [0001] The invention belongs to the technical field of hoisting, in particular to an electric hoist for a single beam crane. Background technique [0002] Electric hoist is a kind of special lifting equipment, which is installed on the crane and gantry crane. It has the characteristics of small size, light weight, simple operation and convenient use. tons, with a lifting height of 30 meters. Electric hoists are generally composed of motors, transmission mechanisms, brakes or gearboxes, reels or sprockets, wire ropes, hook devices and other components. [0003] The existing electric hoist braking device is composed of a motor braking mechanism and a reduction gear braking mechanism. When the bearings, gears, gear shafts and other parts of the reducer are damaged or the braking mechanism of the motor and the reducer cannot be effectively braked, the heavy lifting object will have a downward impact under the action of gravity, which is easy to damage the work ...

AI Technical Summary

Problems solved by technology

[0005] Although this type of technical solution increases the safety factor of the electric hoist and can maintain the advantages of excellent braking performance of the electric hoist for a long time; however, the braking of this type of electric hoist needs to be equipped with various sensors, and the motor braking The load is too large, for this reason, we propose an electric hoist for single-girder cranes to solve the above problems

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