The invention discloses an anti-back-tilting device for a cantilever crane, a cantilever crane system and a crane, relates to the field of crane hoisting, and is used for reliably preventing the cantilever crane from tilting backwards. The cantilever crane anti-back-tipping device comprises a sleeve, a core tube and a limiting assembly. The sleeve comprises a sliding hole and a positioning hole which are communicated with each other; and the positioning hole penetrates through the wall body of the sleeve. One end of the core tube is slidably inserted into the sliding hole of the reinforcing tube. The limiting assembly is rotatably mounted on the outer wall of the reinforcing pipe; in the process that the included angle of the sleeve is changed relative to the ground, the limiting assembly is constructed to be unchanged relative to the included angle of the ground, so that the positioning hole of the sleeve automatically rotates to the position clamped by the limiting assembly. According to the technical scheme, two different states are set, so that the arm support anti-back-tipping device has different working performance, and the requirements of the arm support in the two different states of arm connecting and working are met. And moreover, the backward inclination prevention difficulty is effectively reduced, the installation is convenient, the adaptability is strong, and the reliability is high.

    本发明公开了一种臂架防后倾装置、臂架系统以及起重机,涉及起重机吊装领域,用以可靠地防止臂架后倾。臂架防后倾装置包括套管、芯管以及限位组件。套管包括相互连通的滑移孔以及定位孔;定位孔贯穿套管的壁体。芯管一端可滑移插入加强管的滑移孔中。限位组件可转动地安装于加强管的外壁;其中,在套管相对于地面改变夹角的过程中,限位组件被构造为相对于地面的夹角不变,以使得套管的定位孔自动转动至被限位组件卡紧的位置。上述技术方案,通过设置两种不同的状态,来使得臂架防后倾装置具有不同的工作性能,以满足臂架接臂、工作两种不同状态下的需求。并且有效降低了防后倾的难度,安装方便、适应性强、可靠性高。


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    Title :

    Cantilever crane anti-tilting device, cantilever crane system and crane


    Additional title:

    臂架防后倾装置、臂架系统以及起重机


    Contributors:
    SHI GUOSHAN (author) / CUI DANDAN (author) / XIE CHANGKAI (author)

    Publication date :

    2023-09-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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