Power transmission shaft
    8.
    发明公开
    Power transmission shaft 审中-公开
    Antriebswelle

    公开(公告)号:EP1531276A2

    公开(公告)日:2005-05-18

    申请号:EP04256924.4

    申请日:2004-11-09

    申请人: NTN CORPORATION

    IPC分类号: F16C3/00

    摘要: An object of the present invention is to provide a technique for improving a strength, especially a fatigue strength of a power transmission shaft provided with a serrated portion for torque transmission such as a spline shaft.
    A power transmission shaft is serration-fitted to an inner joint member of respective constant velocity joints (2, 3). A driveshaft (1) is provided with a serrated portion (A) as well as a smooth portion (B) having a cylindrical outer circumferential surface (4a). A cut-up portion (13) is formed at the end portion of the serrated portion (A). When applying an induction hardening to the smooth portion (B) and the serrated portion (A), a hardening ratio of the smooth portion (B) is set at a different value from that of the serrated portion (A), and such that a fatigue strength of the smooth portion (A) becomes equal to or greater than that of the serrated portion (A).

    摘要翻译: 本发明的目的是提供一种用于提高设置有诸如花键轴的扭矩传递用锯齿部的动力传递轴的强度,特别是疲劳强度的技术。 动力传递轴与各等速接头(2,3)的内接头构件配合。 驱动轴(1)具有锯齿状部分(A)以及具有圆柱形外圆周表面(4a)的平滑部分(B)。 在锯齿状部(A)的端部形成切口部(13)。 当对光滑部分(B)和锯齿状部分(A)施加感应淬火时,将平滑部分(B)的硬化比设定为与锯齿状部分(A)不同的值, 光滑部分(A)的疲劳强度变得等于或大于锯齿状部分(A)的疲劳强度。