The invention provides a trackless portal crane. The trackless portal crane comprises a cross beam, wherein a sliding rail is fixedly connected to the bottom end of the cross beam; an electric hoist is slidably connected to the bottom end of the sliding rail; upper supporting rods are fixedly connected to the two sides of the bottom end of the cross beam separately; lower supporting rods are connected to the bottom ends of the upper supporting rods through a plurality of telescopic rods; double-head hydraulic rods are further arranged at the outer sides of the upper supporting rods and the lower supporting rods; piston rods at the two ends of each double-head hydraulic rod are correspondingly and fixedly connected with the upper supporting rods and the lower supporting rods separately; a carrying plate is fixedly connected to the bottom end of the lower supporting rods; universal wheels are arranged at the four corners of the bottom end of the carrying plate separately; n-shaped framesfurther slidably penetrate through the two ends of the carrying plate separately; the two ends of the n-shaped frame are jointly and fixedly connected with a supporting plate located below the carrying plate; and the middle of the top of the n-shaped frame is connected with the carrying plate through a single-head hydraulic rod. The trackless portal crane is capable of realizing rapid lifting forthe cross beam, so that the application range is widened, and the stability can be guaranteed when the electric hoist is used for hoisting objects.

    本发明提供了一种无轨门式起重机,该无轨门式起重机包括:横梁,横梁的底端固定连接有滑轨,滑轨的底端滑动连接有电葫芦,横梁底端的两侧分别固定连接有上支撑杆,上支撑杆的底端通过多个伸缩杆连接有下支撑杆,上支撑杆和下支撑杆的外侧还设置有双头液压杆,双头液压杆两端的活塞杆分别与上支撑杆和下支撑杆对应固连,下支撑杆的底端固定连接有载物板,载物板的底端四角处分别设置有万向轮,载物板的两端还分别滑动贯穿有n形架,n形架的两端共同固定连接有位于载物板下方的支撑板,n形架顶部中间与载物板之间通过单头液压杆连接。本发明能实现对横梁的快速升降,提高了适用性范围,且能在使用电葫芦吊运物件时保证稳定性。


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    Title :

    Trackless portal crane


    Additional title:

    一种无轨门式起重机


    Contributors:
    PENG JUN (author) / LUO XUEMING (author)

    Publication date :

    2021-02-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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