Method and device for reducing over-high deflection in amplitude changing process of caterpillar-band crane arm support

Abstract

The invention relates to a method and a device thereof for reducing over-high deflection in amplitude changing process of caterpillar-band crane arm support. A waist-rope device is arranged on the arbitrary point in the + / -3-meter distance of the maximum deflection of a crane arm support and can be in an extendible structure, one support point of the waist-rope device is on a pulling plate or a pulling rope or a pulling tube of a crane, and the other end is connected with the arm support. The waist-rope device uses the cooperative work of two groups of pulley sets and a steel wire to control the collection and the release of the steel wire under the traction of a winding engine and adjust the distance between the two pulley sets so as to adjust the distance between the crane arm support and the pulling plate or the pulling rope or the pulling tube and control the deflection in the amplitude changing process of the arm support. The invention changes the length of the waist rope by collecting and releasing the steel wire, thus, the problem of the over-high deflection when the arm support rises can be solved, and the difficult problem of the reverse action force on the arm support after the arm rises can also be solved.

Description

technical field [0001] The invention relates to a crawler crane, in particular to a method and a device for reducing excessive deflection during the luffing process of a crawler crane boom. Background technique [0002] At present, the waist rope device of crawler cranes is adopted at home and abroad, such as the disclosed "crane arm frame flexible follow-up balance waist rope device" disclosed by Chinese patent announcement number CN01217725, the device has a waist rope, and one end of the waist rope is connected in the middle of the boom with a pin position, the other end is connected to the luffing pulley block, and the luffing pulley block is connected to the other end of the jib through the luffing cable. [0003] During the luffing process of the jib of the crane, the waist rope keeps the jib in a tensioned state from beginning to end, which reduces the stress on the jib, reduces the deflection of the jib, and overcomes the problem of the jib when it is hoisted. When ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method and device for reducing the excessive deflection of the crawler crane jib during the luffing process, which can reduce the problem of excessive deflection when the jib is raised, and can not generate reverse tension after the jib is raised , will not damage the jib

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