Transmission device for crane

Abstract

The invention discloses a transmission device for a crane. The transmission device comprises an electric hoist machine shell, a threaded groove, a standby steel wire rope and a speed sensor. A windingdrum is arranged in the electric hoist machine shell. The threaded groove is formed in the periphery of the winding drum. The standby steel wire rope is arranged in the middle of the winding drum. The transmission device has the beneficial effects that speed sensor is arranged on a hoisting hook connecting block, the moving speed of a hook is monitored in real time, after the moving speed of thehook exceeds a certain limiting value, an electromagnetic brake locks a main transmission shaft, free-fall motion of the hook is effectively prevented from threating ground crews, and the safety performance of whole equipment is improved; and the threaded groove is formed in the winding drum, thus, the steel wire rope can be orderly arranged in the winding drum in the withdrawal process, the situation that the steel wire rope is stacked somewhere is avoided, transmission of the whole equipment is not affected, and smooth conduction of the operation is ensured.

Description

technical field [0001] The invention belongs to the technical field of hoisting equipment, and in particular relates to a transmission device for a crane. Background technique [0002] Electric hoist is a kind of special lifting equipment, which is installed on the crane and gantry crane. The electric hoist has the characteristics of small size, light weight, simple operation and convenient use. It is used in industrial and mining enterprises, storage, docks and other places. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the drum axis adopts a worm gear transmission. The main components of the wire rope electric hoist include: reducer, operating mechanism, reel device, hook device, coupling, flexible cable current introducer, limiter, etc. Wire rope electric hoist is one of the commonly used lifting equipment in factories, mines, ports, warehouses, freight yards, shops, etc. It is an essential machine for improving l...

AI Technical Summary

Problems solved by technology

[0003] The lifting equipment of the prior art has the following problems: 1. When the electric hoist fails and is left unattended, the main drive shaft may rotate rapidly, causing the lifting hook to fall rapidly downwards, posing a threat to the staff on the ground; 2. 1. During the process of winding the steel wire rope on the drum, the steel wire rope may be stuck on the drum due to the uneven winding of the steel wire rope, which will affect the smooth operation of the internal main shaft and seriously cause damage to the equipment.

Images