A portal crane for roads and bridges comprises a base, an outer barrel is fixedly mounted on the base, a plurality of coaxial inner barrels are rotatably mounted in the outer barrel, the inner diameters of the inner barrels are gradually increased from inside to outside, strip-shaped through grooves are formed in the bottom sides of the inner barrels and the bottom side of the outer barrel respectively, and one side of the periphery of the inner barrel on the innermost side is fixedly connected with one end of a steel wire rope. A nut is installed on the periphery of the reciprocating lead screw in a threaded fit mode, the sleeve is fixedly connected with the nut, a driving device capable of driving the inner barrels to rotate is arranged on the base, and when one inner barrel rotates, the inner barrel inside the inner barrel synchronously rotates along with the inner barrel, and the inner barrel outside the inner barrel is static. The device is simple in structure and ingenious in conception, multiple layers of steel wire ropes are wound on different inner barrels, extrusion and abrasion between the steel wire ropes are reduced, the service life of the steel wire ropes is prolonged, the steel wire ropes are wound on the inner barrels with different diameters, the steel wire rope winding and unwinding speed is adjusted, the market requirement can be met, and the device is suitable for popularization.

    一种路桥用门式起重机,包括底座,底座上固定安装外筒,外筒内转动安装数个同轴的内筒,内筒的内径由内至外逐渐增加,内筒的底侧、外筒的底侧分别开设条形透槽,最内侧的内筒外周的一侧固定连接钢丝绳的一端,往复丝杠的外周螺纹配合安装丝母,套筒与丝母固定连接,底座上设有能够驱动内筒转动的驱动装置,当一个内筒转动时,该内筒内部的内筒随该内筒同步转动,该内筒外部的内筒静止不动。本发明结构简单,构思巧妙,使多层钢丝绳缠绕在不同的内筒上,减少钢丝绳之间的挤压、磨损,从而延长钢丝绳的使用寿命,并且通过使钢丝绳缠绕在不同直径的内筒上,实现对钢丝绳收绳与放绳速度调节,能够满足市场需求,适合推广。


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    Titel :

    Portal crane for roads and bridges


    Weitere Titelangaben:

    一种路桥用门式起重机


    Beteiligte:
    LIU DONGXIA (Autor:in) / TANG LI (Autor:in)

    Erscheinungsdatum :

    2022-04-15


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B66C Krane , CRANES / B66D Haspeln , CAPSTANS



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