Tower crane standard joint high in shear resistance

Abstract

The invention discloses a tower crane standard joint high in shear resistance. The tower crane standard joint comprises four main chord members, a plurality of steps are fixedly arranged on the main chord members, the upper ends of the four main chord members are fixedly connected through four upper-layer cross beams, the middle portions of the four main chord members are fixedly connected throughfour middle-layer cross beams, and the lower ends of the four main chord members are fixedly connected through four lower-layer cross beams. Upper connecting sleeves and lower connecting sleeves arefixedly arranged at the upper ends and the lower ends of the main chord members respectively. Buckling plates are hinged to the inner sides of the four upper-layer cross beams, buckling grooves buckled to the lower-layer cross beams are formed in the buckling plates, and positioning holes which correspond to one another are formed in the buckling plates and the lower-layer cross beams. Pin shaftsor positioning bolts are inserted into the positioning holes so that the buckling plates and the lower-layer cross beams can be fixed. Through the use of the buckling plates, the inclined pulling force on the main chord members can be exerted on the buckling plates, so that the stress condition of the bolts at the connecting sleeves is reduced, the shear resistance of the standard joint is improved, and the connection firmness between standard joints is enhanced.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a standard section of a tower crane with strong shear resistance. Background technique [0002] The standard section of tower crane plays an important role in mechanical equipment such as cranes, tower cranes, and elevators. A good standard section can not only improve the stability of these cranes, but also improve the safety performance of the whole machine. The Chinese patent with the patent number CN201320541978.X proposes a tower crane standard section, including: a main chord, a connecting sleeve and a web, the connecting sleeve is welded on the main chord, and one end of the web is connected to the The top of the main chord is connected to the middle position of the adjacent main chord at the other end, and the solid strength between the main chords is improved through a triangular structure, so that the standard section has sufficient strength and rigidity. [0003]...

AI Technical Summary

Problems solved by technology

When the tower crane is hoisted, the standard section will be subjected to the bending moment, and the connection part of the main chord may be stressed in a certain direction for a long time, so that the bolts there will be subjected to a large shear force, affecting the joint between the main chord. The firmness of the connection will seriously cause the loosening of the connection part, which will endanger the safety of the tower crane.

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