Mast crane

Abstract

The invention relates to a mast crane, which comprises a mast, an upper hinge supporting piece, a plurality of cable wind ropes, a large arm, two lifting lugs, two small arms and a lower hinge supporting piece, wherein the mast is vertically arranged along the gravity direction; the upper hinge supporting piece is arranged on the top of the mast; the cable wind ropes are connected with the upper hinge supporting piece and a drag pit to fix the mast; the large arm is vertically arranged on the upper part of the mast; the lengths of the large arm on the two sides of the mast are the same as each other; one end of each of the two lifting lugs is connected with the two end parts of the large arm; the two small arms are connected with the other end of each of the lifting lugs and are vertical to the lifting lugs; the lengths of the small arms on the two sides of the lifting lugs are the same as each other; the two ends of the small arms are connected with the lifting lugs through hoisting steel wire ropes of a winch; and the lower hinge supporting piece is arranged at the bottom of the mast. According to the technical scheme, all the parts of the mast crane can be uniformly stressed as much as possible, the additional bending moment of the mast is reduced, and the balance performance of a complete machine is improved, so that the reliability of the mast crane is improved.

Description

technical field [0001] The invention relates to a crane, in particular to a mast crane. Background technique [0002] Mast cranes are fixed-mounted cranes. The mast crane has the characteristics of simple structure, easy design and manufacture, low cost, easy disassembly and assembly, variable amplitude, small dead weight and large capacity. Mast cranes are generally used in occasions where the components are heavy, the hoisting projects are concentrated, the construction site is narrow, and there is a lack of other suitable large-scale hoisting machinery. [0003] In the process of realizing the present invention, the inventor found that the existing mast cranes with a lifting capacity of 150 tons or less need to be further improved in terms of force balance of each component, additional bending moment of the mast, and overall machine balance performance. Since the force balance of each component, the additional bending moment of the mast, and the finishing and balancing ...

AI Technical Summary

Problems solved by technology

Since the force balance of each component, the additional bending moment of the mast and the finishing balance performance will affect the reliability of the mast crane, the reliability of the existing mast crane needs to be further improved.

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