Telescopic boom and crane with the telescopic boom

Abstract

The invention discloses a telescopic boom. A basic jib is provided with a main hinge point hole of a superlift device and a hinge pint hole of a variable amplitude oil cylinder; the telescopic boom also comprises a first positioning block and a second positioning block; the first positioning block is arranged on the basic jib at the lower part of the front side of the main hinge point hole; a side of the first positioning block adjacent to the main hinge point hole is provided with a first concave arc positioning face; the first concave arc positioning face adapts to an outer convex arc surface of a hinged end of the superlift device and is concentric with the main hinge point hole; the second positioning block is arranged on the basic jib below the rear side of the hinge point hole of the variable amplitude oil cylinder; a side, of the second positioning block, adjacent to the main hinge point hole of the variable amplitude oil cylinder is provided with a second concave arc positioning face; the second concave arc positioning face adapts to an outer convex arc surface of a hinged end of the variable amplitude oil cylinder, and is concentric with the hinge point hole of the variable amplitude oil cylinder. Accordingly, the telescopic boom can greatly reduce the installation cost while improving the assembly efficiency. Accordingly, the telescopic boom can greatly reduce the installation cost while improving the assembly efficiency. On this basis, the invention also provides a crane provided with the telescopic boom.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a telescopic arm and a crane with the telescopic arm. Background technique [0002] With the continuous development of the world economy, large-scale infrastructure projects such as wind power and large-scale petrochemicals are increasing, and super-large-tonnage all-terrain cranes are favored by the market for their flexible movement, rapid transition, and quick operation. At the same time, the performance requirements for super-large-tonnage cranes are getting higher and higher, and the importance of its super-lifting device to improve the performance of super-large-tonnage cranes is also becoming more and more obvious. [0003] See figure 1 with figure 2 ,in, figure 1 It is a schematic diagram of the overall structure of the existing superlift device, figure 2 yes figure 1 Schematic diagram of the cooperative relationship between the left and right arms of...

AI Technical Summary

Problems solved by technology

[0004] like image 3 As shown, the super-lifting device assembly method requires the use of two auxiliary cranes, which are used to lift the super-lifting device smoothly through the spreader 31 and the spreader 32 respectively, and slowly move to the top of the basic boom section 33, and the lower hinge point 34 of the luffing cylinder Bypass the box-shaped structure above the hinge point hole 35 of the basic arm, and drop to the bottom of the hinge point hole 35; then, the hinge point hole 36 and the hinge point hole 37 are aligned through repeated adjustments in the front, rear, left, and right directions of the auxiliary crane. This process is time-consuming and laborious. , during the centering process, the height of the lifting device 32 should be slightly higher than that of the lifting device 31, so that the overall super-lifting device is inclined (the hoisting end is upturned), so that the main hinge point hole is centered and the shaft is threaded; the hinge point hole 36 and After the hinge point hole 37 is fixed by the shaft, remove the spreader 31, lift the lower hinge point 34 of the superlift luffing cylinder with the auxiliary crane

Due to the poor micro-movement of the auxiliary crane, the overall assembly process takes a long time; in addition, two auxiliary cranes must be used for assembly, and the installation cost is high

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