Telescopic truss arm and engineering machinery

A technology of construction machinery and truss arms, which is applied to cranes and other directions, can solve problems such as unfavorable manpower and time, and cumbersome operations, and achieve the effects of low price, good production process, and increased selection range

Active Publication Date: 2012-06-20
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, on some construction machinery, the lattice arm needs to change the length of the lattice arm according to the actual working conditions. The usual way is to remove a section of the boom section from the lattice arm or add a section of the boom section to the lattice arm. This method is cumbersome to operate. Not conducive to saving manpower and time

Method used

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  • Telescopic truss arm and engineering machinery
  • Telescopic truss arm and engineering machinery
  • Telescopic truss arm and engineering machinery

Examples

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Embodiment approach

[0036] The telescopic mechanism 2 can take various suitable forms, such as figure 2As shown, according to a preferred embodiment of the present invention, the telescopic mechanism 2 includes a pulley block and a wire rope 13, the pulley block includes a first pulley 11 and a second pulley 12, and the first pulley 11 is fixed to two adjacent The upper part of one side of the outer jib section 1 among the jib sections 1, the second pulley 12 is fixed on the bottom of the inner jib section 1 among the two adjacent jib sections 1, and one end of the steel wire rope 13 is fixed to the The other end of the steel wire rope 13 is wound around the bottom of the second pulley 12 and the top of the first pulley 11 in turn and stretches out from the first pulley 11 . In this way, the expansion and contraction of each boom can be controlled by an independent winch, which has high reliability and good safety.

[0037] There may be two second pulleys 12 , and the two second pulleys 12 may ...

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PUM

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Abstract

The invention provides a telescopic truss arm, which comprises at least two arm sections (1) in nested arrangement, and a extending/retracting mechanism (2) for extending/retracting the arm sections (1), wherein each arm section (1) includes a plurality of chord members (3) each having a round cross section, and a plurality of web members (4) connecting the chord members (3). The invention also provides engineering machinery including the telescopic truss arm mentioned above. With the inventive telescopic truss arm, the length of the truss arm can be conveniently adjusted. In addition, the chord member can adopt a round tube with good processibility, high linearity and torsion, various specifications of selectable high-strength materials, and low cost, compared with a conventional square tube, to consequently increase the chord member selection range of the arm section and lower the cost of the telescopic truss arm.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a telescopic lattice arm and construction machinery comprising the telescopic lattice arm. Background technique [0002] Because the structure of the truss arm is light and the force is good, the truss arm has been widely used in construction machinery. At present, on some construction machinery, the lattice arm needs to change the length of the lattice arm according to the actual working conditions. The usual way is to remove a section of the boom section from the lattice arm or add a section of the boom section to the lattice arm. This method is cumbersome to operate. It is not conducive to saving manpower and time. With the development of the lattice arm, a telescopic lattice arm is gradually produced, and the telescopic lattice arm usually includes a boom section and a telescopic mechanism for telescoping the boom section. Since the boom section can be telescopically ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/687
Inventor 詹纯新刘权高一平黎伟福涂凌志王锌
Owner ZOOMLION HEAVY IND CO LTD
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