The invention relates to a limit switch used in an elevator machine room. The limit switch comprises a positioning frame, a steel cable positioning mechanism, a speed limiting mechanism, a main shaft fixed-point stopping mechanism and a controller, wherein the steel cable positioning mechanism, the speed limiting mechanism, the main shaft fixed-point stopping mechanism and the controller are mounted on the positioning frame; the steel cable positioning mechanism comprises a permanent magnet and a limiting magnetic sensor; the speed limiting mechanism comprises a connecting plate, a core sleeve, a fixed contact, a movable contact, a return spring and a centrifugal rod; the main shaft fixed-point stopping mechanism comprises a permanent magnet and a positioning magnetic sensor; the controller is electrically connected with the steel cable positioning mechanism, the speed limiting mechanism and the main shaft fixed-point stopping mechanism respectively. According to the limit switch, a lifting limit position, maximum rotation speed and fixed-point stopping of a car of an elevator are precisely controlled and positioned in the elevator machine room, thereby further improving the safety and the reliability of the elevator operation in a facilitated mode while improving the degree of automation of the elevator control system.


    Access

    Download


    Export, share and cite



    Title :

    Limit switch used in elevator machine room


    Contributors:
    ZHANG CHEN (author) / XU HUA (author) / LYU CHUNHUA (author)

    Publication date :

    2015-11-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



    Elevator limit switch bracket

    CHOI JEONG WON | European Patent Office | 2022

    Free access

    Elevator limit switch auxiliary monitoring method

    LU CHENGLONG / SUN YONG / XIAO YUN et al. | European Patent Office | 2021

    Free access

    LIMIT SWITCH BRACKET FOR AN ELEVATOR

    JI SANG YUL | European Patent Office | 2016

    Free access

    limit switch bracket for an elevator

    European Patent Office | 2016

    Free access

    ELEVATOR AND CAM FOR LIMIT SWITCH ACTUATION

    HATTORI TAKEHITO / SHIMOMURA YUKI / CHIKAHISA JUMPEI | European Patent Office | 2021

    Free access