Lifting mechanism of crane

Abstract

The invention provides a lifting mechanism of a crane. The lifting mechanism comprises a drive mechanism, a dual-link rolling drum, a steel rope device, a horizontal guide mechanism, a vertical guide mechanism, a balance mechanism and a lifting mechanism; the steel rope device comprises a first steel rope, a second steel rope, a third steel rope and a fourth steel rope; the horizontal guide mechanism comprises at least four horizontal guide pulleys which are arranged symmetrically corresponding to the centerline of the double-link rolling drum; the vertical guide mechanism comprises four vertical guide pulleys; the balance mechanism comprises a large balance arm, two small balance arms and a connecting rod, wherein the small balance arms are arranged symmetrically at the two ends of the large balance arm in a manner of corresponding to the large balance arm; each steel rope extends downwards in the vertical direction after bypassing the corresponding horizontal guide pulley and vertical guide pulley and is then fixedly connected with the lifting mechanism, and when uneven forces are applied on the steel ropes during rolling of the double-link rolling drum, the balance mechanism can swing, and when the forces on the steel ropes are balanced, the balance mechanism stops swinging.

Description

technical field [0001] The invention relates to a crane, in particular to a hoisting mechanism of the crane. Background technique [0002] During the hoisting process of some cranes, it is required to ensure that the load must be lifted vertically during the entire hoisting process. The vast majority of cranes use suspension hooks as pick-up devices, and suspension hooks are currently using movable pulleys as labor-saving mechanisms. Especially for hanging loads with relatively large loads, the winding ratio of the wire rope is usually increased. But this means that the total number of segments of wire ropes passing around both sides of the pulley block increases, which leads to interference between the wire ropes. In order to ensure that the steel wire ropes do not interfere, a large pulley is provided to adjust the lowering angle of the steel wire rope, but it is difficult to ensure that the load can rise and fall vertically during the lifting process. Contents of the ...

AI Technical Summary

Problems solved by technology

But this means that the total number of segments of the wire rope passing around the pulley block increases, resulting in interference between the wire ropes

In order to ensure that the wire ropes do not interfere with each other, a large pulley will be set to adjust the lowering angle of the wire rope, but it is difficult to ensure that the load can be lifted vertically during the lifting process.

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