The invention provides a light-weight and high-rigidity telescopic boom capable of suppressing deformation during manufacturing. The telescopic boom (13) has a telescopic structure formed by a plurality of booms, and has a boom fixing mechanism (15) for fixing a top boom (21) disposed on the inner side of a first intermediate boom (22) disposed on the outer side of the first intermediate boom at a predetermined position, the top boom (21) being disposed on the inner side of the first intermediate boom (22). The boom fixing mechanism (15) is provided with: a boom fixing pin (26) which is provided to the top boom (21) and which advances and retreats with respect to the first intermediate boom (22); a fixing boss (32) which is provided on the first intermediate boom (22) and into which the boom fixing pin (26) is inserted; and a gap maintaining member (90) which is provided on the fixed boss (32) and protrudes outward to maintain a gap between the first intermediate boom (22) and the second intermediate boom (23) disposed further outward.

    本发明提供一种能够抑制制造时的变形的轻量且高刚性的伸缩吊臂。伸缩吊臂(13)由多个吊臂形成伸缩结构,并且具有吊臂固定机构(15),其相对于配置于相对外侧的第一中间吊臂(22),将配置于相对内侧的顶部吊臂(21)固定在规定位置上。吊臂固定机构(15)具备:吊臂固定销(26),其设置于顶部吊臂(21),并相对于第一中间吊臂(22)进退;固定凸台(32),其设置于第一中间吊臂(22),供吊臂固定销(26)插拔;以及间隙维持部件(90),其设置于固定凸台(32),并向外侧突出以维持第一中间吊臂(22)与配置于更外侧的第二中间吊臂(23)之间的间隙。


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    Title :

    Telescopic suspension arm


    Additional title:

    伸缩吊臂


    Contributors:

    Publication date :

    2022-12-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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