The invention relates to the technical field of fabricated buildings, and discloses a crane with a stall protection function. The inner wall of a shell is fixedly connected with a fixing groove, and the inner wall of the fixing groove is fixedly connected with an air bag. According to the crane with the stall protection function, a cable movably connected to the outer side of a cable rotating shaft penetrates out through the shell, a movable groove and a through hole formed in the middle of an electromagnet, when the rotating speed of the cable rotating shaft is too high and the cable is loosened too fast, the temperature of the cable rotating shaft is increased, the air bag absorbs heat and expands upwards to drive a dielectric plate, the relative area between a positive plate and a negative plate is changed to generate current, the current exceeds the minimum resistance value of a piezoresistor, the piezoresistor electrifies the electromagnet, the electromagnet generates a magnetic field, a magnetostrictive rod is affected by the magnetic field to extend, an abutting block is driven to move inwards to clamp the cable, meanwhile, according to the Lenz's law, the principle of rejecting and remaining is adopted, rapid loosening of the cable is prevented, and objects hoisted at the bottom of the cable are prevented from falling off.

    本发明涉及装配式建筑技术领域,且公开了一种具有失速保护功能的起重机,所述壳体的内壁固定连接有固定槽,固定槽的内壁固定连接有气囊。该具有失速保护功能的起重机,通过将线缆转轴外侧活动连接的线缆通过壳体、活动槽和电磁铁的中部处设置的通孔穿出,当线缆转轴转速过快,线缆松动过快时,线缆转轴的温度升高,气囊吸热膨胀向上带动电介质板,改变正极板和负极板之间的相对面积产生电流,电流超过压敏电阻的最小阻值,压敏电阻对电磁铁进行通电,电磁铁产生磁场,磁致伸缩杆受到磁场的影响伸长,带动抵紧块向内运行对线缆进行夹持的同时,根据楞次定律,来拒去留的原理,阻止线缆的快速松动,防止线缆底部吊起的物品掉落。


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    Titel :

    Crane with stall protection function


    Weitere Titelangaben:

    一种具有失速保护功能的起重机


    Beteiligte:
    ZHANG JUN (Autor:in)

    Erscheinungsdatum :

    2021-06-25


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B66C Krane , CRANES



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