Pin shaft connecting structure, assembling and disassembling methods thereof and tower crane

Abstract

Disclosed are a pin shaft connection structure, mounting and dismounting methods thereof, and a tower crane. The pin shaft connection structure comprises two pin shaft connection ear plates (10), fixedly connected to the ends of a chord (50) and arranged oppositely, and a connection pin shaft (20), arranged inside pin shaft connection holes of the two pin shaft connection ear plates (10). Each of the two pin shaft connection ear plates (10) comprises an upper connection plate (11) arranged above and a lower connection plate (12) arranged below. The upper connection plate (11) and the lower connection plate (12) are laterally connected to the ends of the chord (50), respectively. The connection pin shaft (20) is vertically mounted inside the pin shaft connection ear plate (10). The pin shaft connection structure of the present invention is capable of lowering the height of a cargo boom of the tower crane, lowering the transportation cost, and making dismounting convenient without lowering the structural strength of the pin shaft connection ear plate.

Description

technical field [0001] The invention relates to a connection structure of construction machinery, in particular to a pin connection structure, its installation and disassembly method, and a tower crane. Background technique [0002] The pin connection structure has a very important position in the connection structure between the various components of the tower crane, and can connect the various components of the tower crane together safely and effectively. Because the connecting lugs of the pin-shaft connection structure are subjected to a large force, in general, the pin-shaft connecting lugs need to have sufficient thickness and width to ensure the structural strength of the pin-shaft connection structure and prevent the pin-shaft connection structure from being used. During the process, due to the large force, the pin shaft connection lug plate was damaged, resulting in the instability of the connection structure of the tower crane. [0003] In order to prevent the pin-...

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Problems solved by technology

like figure 1 As shown, since the upper chord 50' of the jib root joint is under a greater force, the width of the pin connecting lug 10' is much larger than the height of the upper chord 50' of the jib to meet the requirements of the jib root. In this way, the height of the boom will be greatly increased due to the increase in the width of the lug plate 10' connected by the pin shaft, and the transportation height of the boom will be increased accordingly, which is not convenient for the tower The transportation of the jib of the type crane is easy to increase the transportation cost

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