The invention discloses a rotary locking structure which comprises a fixing seat, a locking sleeve and an inner rod, the lower end of the inner rod and the fixing seat form a revolute pair through twodeep groove ball bearings and a thrust ball bearing, a second spline is arranged at the position close to the lower end of the inner rod, the left side of each tooth of the second spline is of a flatstructure, and a protrusion is arranged on the lower half portion of the right side, a groove is formed in the top end of each bulge, an inner upper spline is arranged at the upper end in the lockingsleeve, a protruding block is arranged on the right side of the lower end of each tooth of the inner upper spline, a first spline is arranged at the top end of the fixing base, the locking sleeve andthe lower end of the inner rod are coaxially installed, the inner upper spline and the second spline are installed in a matched mode, and the locking sleeve can move up and down and rotate relative to the inner rod, namely, the locking sleeve can rotate relative to the inner rod when located at the upper position, the locking sleeve can only move relative to the inner rod when located at the lower position, and an inner lower spline is arranged at the lower end in the locking sleeve and can be matched with and separated from the first spline.

    本发明公开一种转动锁止结构,包括固定座、锁止套、内杆,其中内杆下端通过两个深沟球轴承和一个推力球轴承与固定座构成转动副,靠近内杆下端位置设有第二花键,第二花键每个齿的左侧为平整结构,右侧下半部分设有凸起,每个凸起顶端均设有一个凹槽,锁止套内部上端设有内上花键,内上花键每个齿的下端右侧设有凸块,固定座顶端设有第一花键,锁止套与内杆下端同轴安装,且内上花键与第二花键配合安装,且锁止套可相对于内杆上下移动和转动,即锁止套在上位时可相对于内杆转动,锁止套在下位时只能相对于内杆移动,锁止套内部下端设有内下花键,内下花键可与第一花键进行配合和分离。


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    Titel :

    Rotary locking structure


    Weitere Titelangaben:

    一种转动锁止结构


    Erscheinungsdatum :

    2021-02-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS



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