The invention discloses a two-stage telescopic supporting leg structure of a lorry-mounted crane and a using method of the two-stage telescopic supporting leg structure, and belongs to the technical field of crane engineering.The two-stage telescopic supporting leg structure of the lorry-mounted crane comprises a lower rotating body, the lower rotating body comprises an upper fixing plate and two channel cavities formed in the bottom of the upper fixing plate in parallel, and a left supporting part is installed in the channel cavity located on the rear side; the left supporting component comprises a first-stage supporting leg, a second-stage supporting leg and a stand column, the first-stage supporting leg and the second-stage supporting leg are connected through a horizontal oil cylinder set and achieve stretching and retracting, a vertical oil cylinder used for adjusting the height is arranged in the stand column, the horizontal oil cylinder set comprises a first-stage oil cylinder and a second-stage oil cylinder, and the first-stage oil cylinder and the second-stage oil cylinder are connected through a connecting rod. And a cross-core oil pipe is arranged in the secondary oil cylinder and is communicated with an oil return path of the vertical oil cylinder. According to the invention, the span maximization of the crane support legs is met by adding the structural form of the secondary support legs, and meanwhile, the structural driving is completed by the combination of the horizontal primary and secondary oil cylinders and the matched arrangement of the vertical oil cylinders, so that the hoisting work is safer and more stable.

    本发明公开了一种随车起重机双级伸缩支腿结构及其使用方法,属于起重机工程技术领域,包括下回转体,所述下回转体包括一个上固定板,以及平行设置于上固定板底部的两个通道腔体,位于后侧的通道腔体内安装有左支部件,所述左支部件包括一级支腿、二级支腿以及立柱,所述一级支腿与二级支腿之间通过水平油缸组连接并实现伸缩,所述立柱的内部设有用于调节高度的垂直油缸,所述水平油缸组包括一级油缸和二级油缸,且所述二级油缸内部设有穿心油管,所述穿心油管与垂直油缸的回油路连通。本发明通过增设二级支腿的结构形式,满足了起重机支腿的跨距最大化,同时由水平子母油缸的组合和垂直油缸的配合设置完成结构驱动,使得吊载工作时更安全稳定。


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    Title :

    Two-stage telescopic supporting leg structure of lorry-mounted crane and use method of two-stage telescopic supporting leg structure


    Additional title:

    一种随车起重机双级伸缩支腿结构及其使用方法


    Contributors:
    LIANG ZHAOYI (author) / YU ZHENGMAO (author) / CHEN WEI (author) / CAI HONGMEI (author) / SONG MINGJIAN (author)

    Publication date :

    2022-11-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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