Welding centering device for tower crane swing mechanism and welding fixture

Abstract

The invention relates to a welding centering device for a tower crane swing mechanism. The welding centering device comprises a central rotating shaft, tensioning sleeve discs connected with the central rotating shaft in a sleeving manner, and at least three tensioning connecting rod assemblies connected with the tensioning sleeve discs, and the tensioning connecting rod assemblies are uniformly distributed along the circumferential direction of the tensioning sleeve discs. The tensioning connecting rod assemblies comprise rotatable eccentric tensioning wheels, and the outer edges of the eccentric tensioning wheels make contact with an inner ring of a swing supporting seat on the tower crane swing mechanism. The invention provides a welding fixture, and the welding centering device for thetower crane swing mechanism is applied to the welding fixture. According to the welding centering device for the tower crane swing mechanism and the welding fixture, the swing supporting seat can beself-centered in the welding process and always coincides with the design center of the tower crane swing mechanism, then the swing error of the tower crane swing mechanism is reduced, and the swing performance of a tower crane is improved.

Description

technical field [0001] The invention relates to the technical field of tower crane manufacturing, in particular to a welding centering device and a welding fixture used for a slewing mechanism of a tower crane. Background technique [0002] Tower crane is the most commonly used lifting equipment on construction sites, also known as "tower crane", which originated in Western Europe. Due to the large operating space of tower cranes, it can be used for vertical and horizontal transportation of materials in building construction and installation of building components. It is often used to hang construction materials such as steel bars, wooden corrugations, concrete, steel pipes, etc. Therefore, tower cranes have become an indispensable equipment on the construction site. [0003] When the tower crane is running, it often needs to move the hook horizontally, move the counterweight horizontally and rotate the boom at the same time. This process must be carried out smoothly, and th...

AI Technical Summary

Problems solved by technology

Due to the welding heat deformation of the upper slewing bearing during the welding process, a slight deformation will occur at the position of the inner ring, which will cause the center point of the upper slewing bearing to deviate from the design center. Once the operator cannot find this deformation, the tower crane will turn The overall center of the mechanism deviates from the theoretical design center, resulting in the rotation error of the slewing mechanism of the tower crane

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