Device and method for automatic site changing of trackless port portal crane

Abstract

The invention belongs to the technical field of portal cranes, and particularly relates to a device and method for automatic site changing of a trackless port portal crane. The device comprises supporting legs, fixing seats, locking devices and travelling devices; the fixing seats are fixedly connected to the supporting legs of the crane; the locking devices are arranged on the side surfaces of the fixing seats; the travelling devices are fixedly connected to the bottoms of the fixing seats; universal wheels are mounted on the locking devices; and permanent magnets are laid on the ground belowthe travelling devices, and the permanent magnets with S-poles facing upwards and N-poles facing downwards and the permanent magnets with N-poles facing upwards and S-poles facing downwards are arranged alternately. According to the device and the method, excitation coils are electrified with current in different directions, so that magnetic poles of the excitation coils are changed alternately,according to the theory that magnetic fields S and N attract each other, trackless travelling of the crane is realized, the movement range of the crane is enlarged, and the flexibility of the crane isimproved. The device and the method are applicable to trackless movement of the port portal crane.

Description

technical field [0001] The invention belongs to the technical field of gantry cranes, and in particular relates to a device and method for a trackless port gantry crane to automatically switch sites. Background technique [0002] Gantry cranes are generally divided into four legs, L-shaped and one leg is fixed and the other leg is rotated around. Four-legged and L-shaped gantry cranes can only rely on iron wheels and tracks to move on the track as a whole. There are related patents on how to make the gantry crane move from one set of tracks to another set of tracks, but they still can't get rid of the tracks. Limiting its range of movement greatly reduces its productivity. A gantry crane with one leg fixed and the other leg rotating around is a full circle, and relatively speaking, the range of motion has become larger. So is there a method or device that enables the gantry crane to move in any direction along the site plane, so as to fully exert the role of the gantry cra...

AI Technical Summary

Problems solved by technology

Four-legged and L-shaped gantry cranes can only rely on iron wheels and tracks to move on the track as a whole. There are related patents on how to make the gantry crane move from one set of tracks to another set of tracks, but they still can't get rid of the tracks. Restricting its range of movement greatly reduces its productivity

So is there a method or device that enables the gantry crane to move in any direction along the site plane, so as to give full play to the role of the gantry crane and create the greatest benefit?

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