The invention discloses a connection bolt hole limit switch between a tower crane rotation lower support and a standard knot, the connection bolt hole limit switch comprises a limit switch and a bolt hole, the limit switch comprises a normally-closed positive electrode contact, a push rod, a shell, a positive terminal, a spring, a negative terminal and a normally-closed negative electrode contact, the push rod comprises a connector and a support rod, and the support rod is connected with the shell. One end of the supporting rod is arranged in the shell, the other end of the supporting rod is arranged at the bottom of the connector, a through hole is formed in the top of the shell, a fixing groove, a first fixing hole and a second fixing hole are formed in the inner side face of the bottom of the shell, the normally-closed positive electrode contact is arranged on the left side of the supporting rod, and the normally-closed negative electrode contact is arranged on the right side of the supporting rod; the invention relates to a safety device for lifting, mounting and dismounting a tower crane, which is placed in a rotary lower support and a standard knot connecting bolt hole when in use, detects whether a connecting bolt is connected or not through a mechanical device, and is linked with a rotary motor, a variable amplitude motor and a lifting motor of the tower crane.

    本发明公开了一种塔吊回转下支座与标准节之间的连接螺栓孔限位开关,包括限位开关和螺栓孔,所述限位开关包括常闭正极触点、顶杆、壳体、正极接线柱、弹簧、负极接线柱以及常闭负极触点,所述顶杆包括连接头和支撑杆,所述支撑杆一端设置于壳体内,另一端设置于连接头底部,所述壳体顶部设有通孔,所述壳体底部内侧面上设有固定凹槽、第一固定孔和第二固定孔,所述常闭正极触点设置于支撑杆左侧,所述常闭负极触点设置于支撑杆右侧;本发明是一种用于塔吊顶升、安拆时候用的安全装置,使用时放置于回转下支座和标准节连接螺栓孔内,通过机械装置探测连接螺栓是否连接,并于塔吊的回转、变幅、提升电机连锁。


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    Title :

    Connecting bolt hole limit switch between rotary lower support and standard knot of tower crane


    Additional title:

    一种塔吊回转下支座与标准节之间的连接螺栓孔限位开关


    Contributors:
    LI QIANG (author)

    Publication date :

    2022-06-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES



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