Folding jib for lattice boom crawler cranes

Abstract

The invention discloses a folding arm support for a truss arm crawler crane. The folding arm support comprises an upper arm section and a lower arm section which are connected with each other through a middle section, wherein the middle section comprises an upper part and a lower part which are rotatably connected with each other; the upper arm section and the lower arm section are fixedly connected with the upper part and the lower part of the middle section respectively; connection structures between the upper arm section and a platform as well as the lower arm section and the platform at least comprise a first pulling plate arranged between the upper arm section and the platform and a second pulling plate arranged between the lower arm section and the platform; the lower ends of the first pulling plate and the second pulling plate are connected with a main variable-amplitude steel rope respectively; and the first pulling plate comprises an upper part internal pulling plate and a lower part internal pulling plate which are connected with each other. The folding arm support can successfully realize folding after working, so the gravity center is reduced, running of the whole arm support is realized, the arm support can be folded without being landed, running stability is enhanced, safety during transferring is guaranteed and transferring efficiency is improved.

Description

[0001] technical field [0002] The invention relates to a jib structure, in particular to a folding jib for a lattice arm crawler crane. Background technique [0003] As an important lifting equipment in modern construction, crawler cranes play an increasingly important role in my country's efforts to strengthen infrastructure construction, and its safety has also received more and more attention. The main load-bearing structural parts determine the safety of the whole machine. Usually, especially in the hoisting process of wind turbines, when the crawler crane is moving, if the whole machine is walking with the jib, on the one hand, due to the high center of gravity of the whole machine, there will be a large gap during the transition. The risk of side tipping; on the other hand, if the boom is removed, the transition efficiency will be seriously affected due to the long disassembly and assembly time. Contents of the invention [0004] In view of the above existing prob...

AI Technical Summary

Problems solved by technology

Usually, especially in the hoisting process of wind turbines, when the crawler crane is moving, if the whole machine is walking with the jib, on the one hand, due to the high center of gravity of the whole machine, there will be a large gap during the transition. Risk of side tipping; on the other hand, if the boom is removed, the transition efficiency will be seriously affected due to the long disassembly time

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