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Folding extension arm

A long-arm, folding technology, applied in the field of extended arms, can solve the problems of high manufacturing precision, unsafe transportation, and large overall weight of folding cranes, and achieve the effects of saving transportation costs, stable transportation, and reducing transportation space

Active Publication Date: 2012-09-19
ZHEJIANG SANY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of folding crane requires high manufacturing precision, heavy overall weight, and unsafe transportation

Method used

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  • Folding extension arm
  • Folding extension arm
  • Folding extension arm

Examples

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Embodiment Construction

[0027] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] See figure 1 and figure 2 As shown, a foldable extension arm includes an upper forehead arm 1, a lower forehead arm 2 and a pull plate 3 connecting the upper forehead arm 1 and the lower forehead arm 2; the pull plate 3 connects with the upper forehead arm 1 and Lower forehead arm 2 connection. One end of the upper forehead arm 1 is provided with an upper connecting hole 11 , and the other end is provided with an upper mounting hole 12 for installing the upper forehead arm on the jib section 5 of the crane. One end of the lower forehead arm 2 is provided with a lower connecting hole 21, and the other end is provided with a lower mounting hole 22 for installing the upper forehead arm on the boom section 5 of the crane. One end of the pull plate 3 is provided with a first connection hole 31 for connecting the pull plate 3 and the upper forehead ...

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PUM

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Abstract

The invention discloses a folding extension arm, which comprises an upper arm, a lower arm and a pulling plate connecting the upper arm with the lower arm; and the pulling plate is connected with the upper arm and the lower arm through pin shafts. The folding extension arm can make up for the deficiency of manufacturing accuracy, and the whole weight of the extension arm is reduced; and in transportation, the folding extension arm is folded to descend the center of gravity so as to have the advantages of stable transportation, small transportation space and transportation cost conservation.

Description

technical field [0001] The invention relates to an extension arm of a hoisting machine, in particular to a foldable extension arm. Background technique [0002] The extended arm of the hoist is connected to the top of the jib, which can increase the length of the jib and increase the operating range, which is very practical and convenient for light-load and fast operations. At present, the extension arm is usually made into an integral structure, which is connected with other boom units through joints or lug plates. The extended arm of this overall structure has very strict requirements on the size of the connecting part, which brings great difficulties to the manufacture. Installation is also inconvenient. [0003] A jib comprising a jib support, a jib folding middle member and a jib top, which are hinged to each other at the same height as their lower jib. The intermediate member is connected to the boom support by a motorized mechanism controlling its rotation about th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/64
Inventor 张扬刘雪梅白刚张世勇孙开胜
Owner ZHEJIANG SANY EQUIP