The invention belongs to the technical field of automobile seats, and particularly relates to a framework structure of an automobile seat backrest. The framework structure comprises a framework body,the framework body comprises a backrest frame and connecting bases, the connecting bases are installed on the left side and the right side of the lower portion of the backrest frame, and a rotating shaft is installed between the backrest frame and the connecting bases; and first bearing holes are formed in the sides, away from the backrest frame, of the connecting bases on the left side and the right side correspondingly, first bearings are installed in the first bearing holes, and rotating shafts are fixedly connected to the left side and the right side of the lower portion of the backrest frame correspondingly. The framework structure has the beneficial effects that a first motor drives a worm to rotate, as the worm is meshed with a worm wheel, the worm drives the worm wheel to rotate, the worm wheel drives the backrest frame to rotate through the rotating shafts to adjust the backrest angle, and the spiral lead angle of the worm is smaller than the equivalent friction angle betweenthe worm and the meshing teeth of the worm wheel, so that self-locking is generated, the worm wheel cannot drive the worm to rotate, and the situation that the worm wheel drives the worm to rotate tochange the backrest angle when the backrest is stressed is avoided.

    本发明公开的属于汽车座椅技术领域,具体为一种汽车座椅靠背的骨架构造,包括骨架本体,所述骨架本体包括靠背框和连接座,所述靠背框下方左右两侧均安装有连接座,所述靠背框与连接座之间安装有转轴,左右两侧的所述连接座远离靠背框的一侧均开设有第一轴承孔,所述第一轴承孔中安装有第一轴承,所述靠背框下方左右两侧均固定连接有转轴,第一电机带动蜗杆转动,由于蜗杆与蜗轮啮合,蜗杆带动蜗轮转动,蜗轮通过转轴带动靠背框转动,对靠背角度进行调节,且由于蜗杆的螺旋线升角小于蜗杆和蜗轮啮合齿间的当量摩擦角,从而产生自锁,使蜗轮无法带动蜗杆转动,避免靠背受力时,通过蜗轮带动蜗杆转动,从而改变靠背角度。


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    Titel :

    Framework structure of automobile seat backrest


    Weitere Titelangaben:

    一种汽车座椅靠背的骨架构造


    Beteiligte:
    LIU LILI (Autor:in)

    Erscheinungsdatum :

    2020-11-24


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet



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