To provide a small mobile crane that can operate continuously for a long time even though the mountable battery is small and of small capacity.SOLUTION: When power is externally supplied, a small mobile crane 1 uses an external power source as a drive power source to drive an electric motor 12 to perform crane operations. At the same time, an on-board battery 13 is charged using the external power source. When load of the electric motor 12 is high, insufficient current is supplemented from the battery 13. Since the electric motor 12 is driven and the battery 13 is charged in parallel, it is possible to avoid frequent shortage of remaining capacity of the battery 13, which is compact and of small capacity, and to operate for a long time.SELECTED DRAWING: Figure 2

    【課題】搭載可能なバッテリが小型で小容量であっても、長時間に亘って連続運転可能な小型移動式クレーンを提供すること。【解決手段】小型移動式クレーン1では、外部から電力が供給される場合には、外部電源を駆動電源として用いて電動モータ12が駆動され、クレーン作業等が行われる。同時に、外部電源を用いて搭載されているバッテリ13が充電される。電動モータ12の高負荷時にはバッテリ13から不足電流を補う。電動モータ12の駆動とバッテリ13の充電が並行して行われるので、小型の小容量のバッテリ13の残容量不足が頻繁に発生することを回避でき、長時間運転が可能である。【選択図】図2


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    Title :

    ELECTRIC SMALL MOBILE CRANE


    Additional title:

    電動式の小型移動式クレーン


    Contributors:

    Publication date :

    2022-03-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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