The invention provides a boom amplitude limiting system and method and a vehicle-mounted overhead working truck, the boom amplitude limiting system comprises a hydraulic system and a controller, the hydraulic system comprises a variable amplitude oil cylinder, a telescopic oil cylinder, a first amplitude limiting valve, a second amplitude limiting valve and a multi-way valve, a second working port is sequentially communicated with the first amplitude limiting valve and a rod cavity of the variable amplitude oil cylinder, and a second working port is sequentially communicated with a second working port of the multi-way valve. The third working port is sequentially communicated with the second amplitude limiting valve and a rodless cavity of the telescopic oil cylinder; the controller is used for controlling the first amplitude limiting valve and the second amplitude limiting valve to be powered on so as to be reversed to a first station, so that the first amplitude limiting valve and the second amplitude limiting valve can be bidirectionally conducted, or the controller is used for controlling the first amplitude limiting valve and the second amplitude limiting valve to be powered off so as to be reversed to a second station, so that the first amplitude limiting valve and the second amplitude limiting valve can be unidirectionally conducted towards the multi-way valve. According to the vehicle-mounted overhead working truck, the amplitude limiting function can be achieved whether an electric control multi-way valve or a manual multi-way valve is used, and safety is improved.

    本发明提供了一种臂架幅度限制系统、方法及车载式高空作业车,该臂架幅度限制系统包括液压系统和控制器,液压系统包括变幅油缸、伸缩油缸、第一限幅阀、第二限幅阀和多路阀,第二工作口依次与第一限幅阀和变幅油缸的有杆腔连通,第三工作口依次与第二限幅阀以及伸缩油缸的无杆腔连通;控制器用于控制第一限幅阀和第二限幅阀得电以换向至第一工位,以使第一限幅阀和第二限幅阀双向导通,或者,控制器用于控制第一限幅阀和第二限幅阀失电以换向至第二工位,以使第一限幅阀和第二限幅阀分别朝向多路阀单向导通。本发明的车载式高空作业车无论使用电控多路阀还是手动多路阀时均能实现限幅功能,提高了安全性。


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    Title :

    Arm support amplitude limiting system and method and vehicle-mounted overhead working truck


    Additional title:

    一种臂架幅度限制系统、方法及车载式高空作业车


    Contributors:
    FAN DAOPING (author) / TAN HAIBO (author) / ZOU YING (author) / CHEN DONG (author) / LV RONGZHI (author) / XIU QUANWEI (author)

    Publication date :

    2023-06-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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