Bottom trolley structure of large-sized gantry crane

Abstract

The invention discloses a bottom trolley structure of a large-sized gantry crane. The bottom trolley structure of the large-sized gantry crane comprises a ground beam and trolley cross beams, wherein gantry crane supporting legs are welded above the side surface of the ground beam; a second trolley device is connected below the left side surface of an anchoring device through a ground beam fixing device; the ground beam fixing devices are connected to the upper middle parts of the trolley cross beams through ground beam lower flanges; rail clamping devices are arranged at the front ends of trolley frames below the right sides of the trolley cross beams; driving motors are fixedly arranged on trolleys below the left sides of the trolley cross beams; driving wheel sets are mounted below the driving motors; wheels are arranged on the driving wheel sets. The bottom trolley structure of the large-sized gantry crane adopts eight trolleys, so that the stability performance of the gantry crane is effectively improved, and stress conditions during working of the trolleys are reduced; meanwhile, the rail clamping devices are arranged at the front ends of the passive trolleys, so that the stable effect is good and the safety performance is high; the adopted anchoring device enhances the strength of the ground beam and prolongs the service life.

Description

technical field [0001] The invention relates to the technical field of gantry crane equipment, in particular to a bottom trolley structure of a large gantry crane. Background technique [0002] At present, in the field of bridge construction, large-scale gantry cranes play an important role in lifting large-tonnage integral box girders to the bridge deck for girder loading operations. When performing gantry crane operations, the trolley structure at the bottom of the gantry crane plays a very good role in stabilizing, improving the accuracy of the work, and playing the role of moving and stopping. The trolley structure at the bottom of the existing gantry cranes mostly adopts a single trolley on both sides, and one gantry crane is equipped with four trolleys. Therefore, compared with a large gantry crane, the force on the trolley is too large, resulting in poor braking effect. Contents of the invention [0003] The object of the present invention is to provide a bottom tr...

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Problems solved by technology

[0003] The object of the present invention is to provide a bottom trolley structure of a large-scale gantry crane, to solve the problem that one gantry crane is provided with four trolleys in the background technology, so compared with the large-scale gantry crane, the force on the trolley is too large, which leads to The problem of poor braking effect

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