Arch gantry crane

Abstract

The invention relates to an arch gantry crane. Arch main beams are connected with support legs through upper cross beams at two ends; a traveling trolley is mounted on the two arch main beams, and is stretched across the arch main beams; an electric block is suspended at the upper middle part of the traveling trolley through a transverse shaft; transmission chain wheels are fixedly mounted on end beams at the two sides of the traveling trolley; the two sets of the transmission chain wheels both use a motor and a speed reducer as driving devices, are respectively horizontal to the two sides, and are connected with transmission shafts in mirror symmetry; chain wheels are fixedly mounted at the ends of both the transmission shafts; and the four chain wheels are engaged and fixed on chains at the inner sides of the arch main beams. The crane adopts an arch double-main beam gantry structure, and adopts a trolley-traveling and chain-wheel-transmission manner to form an arch roof structure with stable structure, smooth operation and proper lifting height; the physical limits of factory building structures are overcome; the construction cost is effectively reduced; and the arch gantry crane is a special crane, and is suitable for factory buildings with special structures and occasions having precise transverse positioning and a certain requirement on the lifting height.

Description

technical field [0001] The invention belongs to the field of cranes, and relates to a gantry crane, in particular to an arched gantry crane whose main girder is an arched girder. Background technique [0002] Usually, the main girder of the gantry crane is a horizontal girder, and the electric hoist runs on the main girder, and the main girder walks on the track; Double girder crane; if the two ends of the main girder are fixed on the outriggers, and the lower beam connected by the outriggers walks on the track on the ground, this kind of crane is a gantry crane. Gantry cranes are highly independent, unlike single-girder or double-girder cranes fixed in the factory building, they can perform lifting operations at various locations inside and outside the factory building, and are widely used. [0003] In existing gantry cranes, the horizontal main girder fixes the lifting height, that is, the height of the main girder determines the lifting height, and the lifting height is ...

AI Technical Summary

Problems solved by technology

[0003] In the existing gantry cranes, the horizontal main girder fixes the lifting height, that is, the height of the main girder is determined and the lifting height is determined, and the lifting height is limited by the physical height of the factory building

However, in the case of some arch-shaped special-structure workshops that require a constant span but only partially require a large lifting height, changing the structure of the workshop will greatly increase the construction cost; at the same time, due to the increased lifting height, it is easy to It causes unstable lifting, increases the swing of heavy objects, and brings many unsafe factors to the lifting operation; and when lifting valuable and dangerous objects, it is necessary to run horizontally with accurate and stable positioning, such as using the previous trolley transmission Type, can not effectively solve the resistance or inertial force generated when the trolley runs uphill or downhill on the arched main beam, making its speed unstable when running

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