Tower crane mast section pin shaft connection method

Abstract

The invention discloses a tower crane tower body section pin shaft connecting method, and belongs to the technical field of tower cranes. The the tower body section pin shaft connecting method comprises the following steps: arranging a tower body section tenon in an inner hole of a main branch end and then putting the block pin in the block pin hole of the otic placode; arranging a bumper pin in a bumper pin hole of an ear board; arranging the connecting pin shaft which has a lockpin groove end in a connecting hole of the main branch of the tower body section; causing the end part of the lockpin part of the connecting pin shaft to contact with the bumper pin; arranging the lockpin in a lockpin hole of the ear board to lock the connecting pin shaft, using a cotter lockpin to fix the lockpin; exiting from the bumper pin,and completing the connection of a pin shaft. The connecting pin shaft comprises a pin shaft main body, an introducing part and a lockpin part, wherein, the introducing part is positioned between thepin shaft main body and the lockpin part; the lockpin groove used for fixing the lockpin is formed on the lockpin part along a circumference direction. The lockpin groove is formed on the connecting pin shaft of the invention and is free from the direction restrain during the lockpin process; and the introducing part is positioned between the connecting pin shaft main body and the lockpin groove,thereby causing the lockpin groove not to influence the introducing process of the connecting pin shaft. The invention has the advantages of convenient installation and detachment.

Description

technical field [0001] The invention belongs to the technical field of tower cranes, and in particular relates to a method for connecting pin shafts between tower body sections of a tower crane and a structural form of the used connecting pin shafts. Background technique [0002] At present, some of the tower cranes are connected by pin shafts, and some are connected by high-strength bolts. The tower body sections connected by tenons or fishplates are all connected by pins. This working method has high safety and reliability. It is enough to put the connecting pins in place and then position them. There is no pre-tightening force requirement; The method of connecting the tower body sections with high-strength bolts is simple, but the high-strength bolts must have an appropriate pre-tightening force to ensure work safety. [0003] At present, the pins used to connect the tower sections mainly have the following three problems: [0004] 1. Most of them are pin shafts with he...

AI Technical Summary

Problems solved by technology

In order to ensure that the orientation of the positioning hole on the pin shaft is consistent with the orientation of the positioning hole used for the pin shaft positioning hole on the positioning sleeve, the two holes must be aligned before driving the pin shaft. If the hole position changes after driving, it must be withdrawn. It is difficult and work-intensive to re-drive the pin

[0005] 2. With this connection method, when the pin shaft is withdrawn, it must be punched from the inside of the tower body section. Because there are not all platforms in the tower body section, it is difficult for workers to stand on it, which brings difficulties to the disassembly of the tower body section. inconvenient

[0006] 3. The connecting pins used between the tower body sections are all made of precious high-strength alloy steel. If the headed pins are used, they must be turned with larger diameter materials, resulting in waste of materials

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