Folding-arm-type super lifting counter weight amplitude variation device for crawler crane

Abstract

The invention relates to a folding arm type superlift counterweight luffing device for a crawler crane, comprising a superlift mast arranged on the crawler crane, the superlift mast is connected with the superlift counterweight of the crawler crane through the superlift counterweight pull plate connected, a superlift counterweight luffing device is provided between the superlift counterweight and the crawler crane, and the superlift counterweight luffing device includes a first folding arm frame whose connection end is connected to the crawler crane, a connection end connected to The second folding arm frame connected to the superlift counterweight pull plate, the movable end of the first folding arm frame is movably connected with the active end of the second folding arm frame, and between the first folding arm frame and the second folding arm frame There is also a telescopic cylinder. The present invention does not need to readjust the angle of the main arm, so that the operation of the whole process becomes simpler; the present invention only needs to set a fixed point at the rear of the turntable to realize the large-range amplitude change of the overlift.

Description

technical field [0001] The invention relates to a luffing mechanism of a crawler crane, in particular to a folding arm type superlift counterweight luffing device for a crawler crane. Background technique [0002] The crawler crane is a crane with a lattice boom structure using a crawler chassis. The superlift counterweight luffing device on the crawler crane is composed of the superlift mast of the crawler crane, the superlift counterweight pull plate and the horizontal support device of the superlift counterweight. [0003] The luffing function of superlift counterweight is also a necessary basic function of large crawler cranes. Its luffing device structure determines the convenience of its luffing function, and then determines the operability of the crane. [0004] At present, there are mainly two structural forms of traditional superlift counterweight luffing, such as figure 1 with figure 2 Shown: [0005] The first traditional structural form is that the superlift...

AI Technical Summary

Problems solved by technology

[0008] The disadvantages of adopting the traditional first structural form are: 1. During the process of superlift counterweight luffing, the positional relationship of superlift mast 10 relative to the whole machine will change, thereby affecting the change of the main arm angle, so It is necessary to re-adjust the angle of the main arm, which makes the operation of the whole process very complicated; 2. During the process of changing the amplitude of the superlift counterweight 20, the height of the upper hinge point of the superlift mast 10 changes greatly, causing the superlift counterweight The height of 20 varies greatly, so for a certain fixed-length superlift counterweight pull plate 40, to ensure that the height of the superlift counterweight 20 is within a reasonable range, the amplitude of the superlift mast will be very small; It is necessary to adjust the length of the superlift counterweight pull plate 40 for a large amplitude change, and it is very difficult to connect the pull plate at high altitude

[0009] The disadvantage of adopting the traditional second structure form is: in order to achieve a larger luffing range, a longer horizontal luffing cylinder 32 must be used, and a longer horizontal support 31 must be equipped to accommodate the horizontal Luffing cylinder 32

This also brings about the problem of small amplitude range under one-time installation conditions, which greatly reduces the range of applicable working conditions of the crane

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