The invention relates to the technical field of forklifts, and particularly discloses a wide-view three-stage portal which comprises an outer portal. The middle door frame is arranged on the outer door frame in a sliding manner; the inner door frame is arranged on the middle door frame in a sliding manner; the fork arm carrier is arranged on the inner portal frame in a sliding manner; the driving part is used for driving the middle door frame to slide; the two sets of driving mechanisms are located on the two sides of the inner door frame correspondingly, each driving mechanism comprises an inner oil cylinder, a chain wheel base, a chain wheel and a chain, a cylinder body of each inner oil cylinder is arranged on the middle door frame, a piston rod of each inner oil cylinder is fixedly connected with the corresponding chain wheel base, each chain wheel base is fixedly connected with the inner door frame, and each chain wheel is rotationally connected to the corresponding chain wheel base; the chain is meshed with the chain wheel, and the two ends of the chain are fixedly connected with the middle door frame and the fork arm carrier respectively. By optimizing the design of the portal frame, the influence of the lifting oil cylinder in the middle on the sight of a driver is reduced, and the safety and convenience of the operation process are improved; each stage of gantry is rigidly supported by an oil cylinder, so that the stability is higher.

    本申请涉及叉车技术领域,具体公开了一种宽视野三级门架,其包括外门架;中门架,滑动设置于外门架上;内门架,滑动设置于中门架上;货叉架,滑动设置于内门架上;驱动件,用于驱使中门架滑动;驱动机构,设置有两组且分别位于内门架两侧,所述驱动机构包括内油缸、链轮座、链轮和链条,所述内油缸的缸体设置于中门架上,所述内油缸的活塞杆与链轮座固定连接,所述链轮座与内门架固定连接,所述链轮转动连接于链轮座上,所述链条与链轮相啮合,所述链条的两端分别与中门架和货叉架固定连接。本申请通过优化门架设计,减少中部的起升油缸对驾驶员视线造成的影响,提升操作过程的安全性和便利性;每一级门架均有油缸进行刚性支撑,稳定性更强。


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    Title :

    Wide-view three-stage portal frame


    Additional title:

    一种宽视野三级门架


    Contributors:
    DING LIANG (author) / CHEN XIAOHONG (author) / YE JIANFENG (author) / WENG LEI (author)

    Publication date :

    2025-02-11


    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 / F16H Getriebe , GEARING



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