Telescopic crane and single cylinder bolt type telescopic boom thereof

Abstract

The invention discloses a single cylinder bolt type telescopic boom. Any side of a telescopic oil cylinder of the telescopic boom is provided with at least two cylinder bolts; the axial lines of the cylinder bolts are parallel to the diameter which horizontally extends on the cross-section of the telescopic oil cylinder; and the cylinder bolts at the same side are positioned on both sides of the diameter which horizontally extends respectively. The invention also provides a telescopic crane. The invention installs at least two cylinder bolts on both sides of the telescopic oil cylinder, moves the cylinder bolts of the single cylinder bolt type telescopic boom from the middle parts of both sides of the telescopic oil cylinder to the tops and the bottoms, effectively utilizes the space inside the last section of the telescopic boom, provides the enlarging space of the cylinder diameter for the telescopic oil cylinder, improves the bearing capacity of the telescopic oil cylinder, and is favorable for the further large-scale development of the telescopic crane.

Description

Technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a single-cylinder pin-type telescopic boom used for a telescopic boom crane. In addition, the present invention also relates to a telescopic boom crane including the single-cylinder bolt type telescopic boom. Background technique [0002] With the rapid development of my country's economic construction, the demand for large-tonnage cranes on the construction site is increasing; large-scale is an important design goal of various cranes. For telescopic boom cranes, the performance of its telescopic boom is very important, which directly affects the overall lifting performance of the crane. [0003] Most of the existing telescopic booms use primary or secondary telescopic cylinder plus rope row technology, and individual large tonnage cranes use three-stage telescopic cylinder plus rope row technology. The multi-stage telescopic cylinder makes the cross section of each sect...

AI Technical Summary

Problems solved by technology

The increase in specifications of telescopic cylinders and cylinder pins requires more space in the telescopic boom of the last section; the above-mentioned larger space can be provided by correspondingly increasing the cross-sectional area of ​​the telescopic boom at the bottom section, but this will result in different specifications of the telescopic boom at each section. Increase accordingly, not only will significantly increase the consumption of materials, but also will significantly increase the self-weight of the entire boom

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