Novel connecting structure for lower chord of cargo boom

Abstract

The invention relates to a novel connecting structure for a lower chord of a cargo boom, and belongs to the field of hoist machinery. The connecting structure comprises a front lower chord, a rear lower chord, a first joint, a second joint, connecting plates and a pin shaft assembly; the first joint is arranged at the right end of the front lower chord, the second joint is arranged at the left endof the rear lower chord, and the first joint is connected with the second joint in a crossed matching mode; the connecting plates are connected with the first joint and the second joint through the pin shaft assembly, and each of the first joint and the second joint comprises an inserting rod, a bottom plate and clamping plates; the inserting rods are correspondingly matched with the front lowerchord and the rear lower chord, the inserting rods are located on one sides of the bottom plates, and at least two clamping plates are evenly arranged on the other side of each bottom plate at intervals. According to the connecting structure, the structural design is simple and reasonable, installation and welding are convenient, the connection is firm and reliable, the structural strength of thelower chord of the cargo boom is effectively improved, the service life of the cargo boom is prolonged, and the safety and the stability of the hoisting machinery operation are improved.

Description

technical field [0001] The invention relates to a boom bottom chord, in particular to a novel boom bottom chord connection structure, which belongs to the field of crane machinery. Background technique [0002] The jib is generally a truss structure, and as an important part of the hoisting machinery, its reasonable structure and the strength of the connection structure between the jib sections play a vital role in the stability and safety of the entire hoisting machinery. [0003] The lower chord of the boom connects each boom section into a whole through a connection structure. The conventional connection structure adopts single and double joints. Although the structure is simple and the installation is convenient, it cannot meet the connection strength requirements between the lower chords of the boom when operating large-scale cranes. [0004] The conventional bottom chord connection structure adopts simple pin shaft and cotter pin fixing, which cannot effectively preve...

AI Technical Summary

Problems solved by technology

Although this patent can safely and reliably install the lower chord pin shaft in place, it cannot effectively prevent the pin shaft from rot

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