The invention discloses a limiting protection type electric hoist which comprises a motor, a rope winding drum, a poke rod, a stop lever and a positioning lamp. The poke rod is of a Z-shaped trend structure and is arranged on the motor in a limited mode, and the lower end of the poke rod is in transmission connection with a switch button of a second microswitch. The stop lever is of a U-shaped rod structure and is in transmission connection with a switch button on a first microswitch. According to the limiting protection type electric hoist provided by the invention, when the height of an object to be lifted is too high and approaches the stop lever, the stop lever is driven to deflect, and then the first microswitch is triggered to turn off a power supply of the motor, so that safety accidents caused by the fact that goods are lifted too high are prevented; in addition, after a steel wire rope on the rope winding drum is completely unwound, if the motor still drives the rope winding drum to rotate, the steel wire rope is inevitably wound from the other side of the rope winding drum, so that the other end of a lever triggers the button of the second microswitch according to the lever principle, and the rope winding drum is prevented from continuously rotating; and the positioning lamp on the stop lever is used for positioning the positions of the goods and a sling, so that the situation that the hoisting gravity center is unstable is prevented.

    本发明公开了一种限位保护式电动葫芦,电机、卷绳筒、拨动杆、挡杆、以及定位灯;其中拨动杆为“Z”字走向结构且限位设置在电机上,其下端部与第二微动开关的开关按钮传动连接;挡杆为“U”形杆结构,与第一微动开关上的开关按钮传动连接。本申请中当待起重物的高度过高以接近挡杆时带动挡杆偏转,进而触发第一微动开关关闭电机的电源,防止货物被提升过高引起安全事故;另外当卷绳筒上的钢丝绳放完后,如果电机仍然带动卷绳筒进行转动,必然使得钢丝绳从卷绳筒的另一侧进行收卷,以利用杠杆原理使得杠杆的另一端触发第二微动开关的按钮,以防卷绳筒继续转动;本申请利用挡杆上的定位灯对货物以及吊索的位置进行定位,防止起吊重心不稳。


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    Titel :

    Limiting protection type electric hoist


    Weitere Titelangaben:

    一种限位保护式电动葫芦


    Beteiligte:
    ZHANG JINGDONG (Autor:in) / LIN XIAOBO (Autor:in)

    Erscheinungsdatum :

    2021-06-22


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B66D Haspeln , CAPSTANS



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