Inter-hook space adjustment mechanism for large gantry cranes

Abstract

The invention discloses an inter-hook space adjustment mechanism for large gantry cranes, which comprises a screw, a fixed base, a power rotating device, a coupling and a big nut, the screw is arranged on the fixed base and can rotate in situ, the output shaft of the power rotating device is connected with one end of the screw through the coupling, the big nut is screwed on the screw at one side of the fixed base far from the coupling, and moreover, one side of the big nut, which is far from the fixed base, is firmly connected with a hoisting mechanism of a large gantry crane, which is provided with hooks. Preferably, the power rotating device is a three-in-one motor. The inter-hook space adjustment mechanism has the advantages of compact structure, reasonable arrangement and stable operation, can reduce the hoisting deflection of wire ropes to the max, and therefore can prolong the service lives of the wire ropes and enhance the safe production performance of the hoisting mechanism.

Description

technical field [0001] The invention relates to a large-scale gantry crane, in particular to a device for adjusting the distance between hooks of a large-scale gantry crane. Background technique [0002] Large-scale gantry cranes have a large weight, and the weight, volume and shape of the objects to be lifted often vary from object to object, and the distribution of the lifting points of the objects is also different. If the lifting point spacing is larger or smaller than the hook spacing, then the hoisting mechanism of the trolley will have a certain deflection angle in the wire rope during the lifting of the object. Compared with the lifting process with no deflection angle or small deflection angle, it is relatively The existence of a large deflection angle will increase the force on the steel wire rope and the object lifting lug, thereby affecting the service life of the steel wire rope and increasing potential safety hazards, and the arrangement position of the object ...

AI Technical Summary

Problems solved by technology

[0002] Large-scale gantry cranes have a large weight, and the weight, volume and shape of the objects to be lifted often vary from object to object, and the distribution of the lifting points of the objects is also different. If the lifting point spacing is larger or smaller than the hook spacing, then the hoisting mechanism of the trolley will have a certain deflection angle in the wire rope during the lifting of the object. Compared with the lifting process with no deflection angle or small deflection angle, it is relatively The existence of a large deflection angle will increase the force on the wire rope and the lifting lug of the object, thereby affecting the service life of the wire rope and increasing potential safety hazards, and the arrangement position of the lifting lug of the object is also restricted

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