Tower crane telescoping guide wheel type variable amplitude trolley

Abstract

A tower crane telescoping guide wheel type variable amplitude trolley is characterized in that the tower crane telescoping guide wheel type variable amplitude trolley is a lateral guide wheel apparatus provided with a traditional trolley, the lateral guide wheel apparatus comprises two modules comprising an installing and positioning module and a guide wheel module, the installing and positioning module and the guide wheel module are connected through a connecting rod and a spring sleeved outside the connecting rod, and the installing and positioning module is directly welded on the trolley.

Description

technical field [0001] The invention belongs to a load trolley of a tower crane, in particular to a luffing trolley of a tower crane. Background technique [0002] When the trolley of the luffing tower crane is working, the trolley is pulled by the luffing wire rope, and the luffing action is realized by rolling the rollers on the upper surface of the lower chord of the boom. At the same time, the lateral rollers contact the outer surface of the lower chord to realize lateral movement. guiding role. Generally, the rollers and side guide wheels are rigidly positioned by welding, but in actual production, due to the limitation of the manufacturing accuracy of the tower crane boom and the trolley itself, there is often an excessive gap between the side guide wheel and the bottom chord of the boom, and the trolley only has Part of the side guide wheel is in contact with the bottom chord, which causes the trolley to cause excessive lateral displacement during the longitudinal l...

AI Technical Summary

Problems solved by technology

Generally, the rollers and side guide wheels are rigidly positioned by welding, but in actual production, due to the limitation of the manufacturing accuracy of the tower crane boom and the trolley itself, there is often an excessive gap between the side guide wheel and the bottom chord of the boom, and the trolley only has Part of the side guide wheel is in contact with the bottom chord, which causes the trolley to cause excessive lateral displacement during the longitudinal luffing of the boom, causing the rollers on the upper surface of the bottom chord to rub against the side web bar or side of the boom during the luffing process of the trolley. Web root weld, generating additional dynamic load

Or because the number of side guide wheels is too small, the frictional resistance of trolley movement increases, which greatly reduces the efficiency of the luffing mechanism of the trolley, and even the trolley is stuck, and the luffing wire rope cannot be pulled.

These situations have seriously affected the use and overall safety of the tower crane.

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