A self-locking structure of threaded connection for installing a step roller of an escalator on a step, comprising: the step having a mounting shaft on which the step roller is installed through a rolling bearing; a threaded connection structure comprising a bolt, a washer and a nut, wherein the mounting shaft has a through hole along its axis line direction, the bolt passes through the washer, the through hole and the nut, and the washer presses the inner ring of the rolling bearing against the mounting shaft through the tightening engagement between the bolt and the nut, wherein a countersunk slot hole for placing the nut is formed at the end of the through hole such that the bolt passes through the nut located in the countersunk slot hole, the sidewall of the countersunk slot hole includes a bottom face and two side faces symmetrical to each other, thereby forming a U-shaped structure in which three sides of the sidewall are closed and one side is open; and when the nut is placed in the U-shaped structure and is positioned by the bottom face and the two side faces, the hole of the nut is exactly aligned with the through hole. The self-locking structure improves the assembly efficiency and can prevent the threaded connection from loosening.


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    Title :

    SELF-LOCKING STRUCTURE OF THREADED CONNECTION


    Additional title:

    SELBSTSICHERNDE STRUKTUR EINER SCHRAUBVERBINDUNG
    STRUCTURE AUTOBLOQUANTE DE RACCORD FILETÉ


    Contributors:

    Publication date :

    2025-01-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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