Shaft hinging type cable crane crown block

Abstract

The invention discloses a shaft hinging type cable crane crown block. The shaft hinging type cable crane crown block comprises an upper rack and a traveling cart, wherein the lower portion of the traveling cart is hinged to the upper portion of the upper rack through an upper rack shaft, a plurality of traveling cart wheels are installed at the top end of the traveling cart, and a plurality of load wheels are installed at the bottom end of the upper rack; the upper rack shaft is provided with a plurality of traction wheels located below the traveling cart wheels, and the whole traveling cart is in the shape of a reverse triangle. It is guaranteed that the torque of the upper rack on the traveling cart is zero under the action of a load; by arranging the traction wheels under the traveling cart and on the two sides of the load wheels, the width of the crown block is reduced, the stability of the crown block is increased, and then torsional deformation of the crown block caused by synchronous traction failure is reduced.

Description

technical field [0001] The invention relates to a lifting device used in a cable crane in a bridge construction project, in particular to a crown block of a shaft-hinged cable crane. Background technique [0002] With the development of highway construction and railway construction in our country, the use of cable cranes in bridge engineering construction has become more and more widely used, especially in bridge engineering with narrow sites, steep mountains and canyons on both sides, and long-span rivers. [0003] As an important lifting device of the cable crane, the crown block is generally assembled from side plates and pulleys through pin shafts. In the existing crane with the upper hanger fixed on the sports car, because the upper hanger is fixed on the sports car and cannot rotate in real time, when the sky crane is pulled to the tower end, the vertical lifting load borne by the upper hanger The angle between the upper hanger and the center line of the sports car wi...

AI Technical Summary

Problems solved by technology

Since the traction wheels are set on the outermost sides of the left and right ends of the crown block, the width of the crown block is increased. If the left and right sides of the crown block cannot be pulled synchronously during the process of pulling the crown block, the force on the traction wheel will The crane produces a large torque. Although the overall torsional rigidity of the crane is improved through the rigid beam on the top, it may also cause lateral shearing, torsional deformation and other force problems of the crane, which poses a safety hazard

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