Locking device of portal crane

Abstract

The invention relates to the technical field of cranes, in particular to a locking device of a portal crane. The locking device comprises mounting plates, wherein a traction column is arranged on thesurface of each mounting plate, a spring sleeves the outer side of each traction column, the other end of each traction column is connected to the surface of a rack, a driving motor is arranged in therack, a shaft body of the driving motor is in transmission connection with a transmission rod through a coupler, a first bearing sleeves the outer side of the transmission rod, the first bearing is installed in a through opening, the through opening penetrates through the mounting plates and sleeves, and each sleeve is installed on the surface of the corresponding mounting plate. The locking device of the portal crane has the beneficial effects that the sleeves are additionally arranged on the two sets of mounting plates, a telescopic structure is additionally arranged on the surface of eachsleeve to drive an inner push plate to be ejected and fixed from an inner ring of a steel bar roll, due to the existence of the telescopic structures, the steel bar rolls with different diameters canbe conveniently fixed, and therefore the stability of the hoisted steel bar rolls is high.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a locking device of a gantry crane. Background technique [0002] Gantry crane is a deformation of bridge crane, also called gantry crane. It is mainly used for loading and unloading operations of outdoor cargo yards, stockyard cargoes, and bulk cargoes. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port freight yards. Its metal structure is like a door-shaped frame. Two legs are installed under the main beam, which can directly walk on the track on the ground. The two ends of the main beam can have outrigger cantilever beams. [0003] In the prior art, steel bars are commonly used consumables during construction. Usually, the steel bars are rolled up and transported in coils. When in use, the steel bars are straightened and used by straightening equipment. Due to the heav...

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Problems solved by technology

[0003] In the prior art, steel bars are commonly used consumables during construction. Usually, the steel bars are rolled up and transported in coils. When in use, the steel bars are straightened and used by straightening equipment. Due to the heavy weight of the steel bar coils, they are usually hoisted and loaded by a gantry crane. , but the traditional gantry crane is hoisted by binding steel coils with ropes, and the binding ropes are removed after loading.

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