公开(公告)号：EP3279514A1

公开(公告)日：2018-02-07

申请号：EP16772876.5

申请日：2016-03-29

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： NARUMIYA, Hiroki ,  KADA, Osamu ,  FUJITA, Takashi ,  NEISHI, Yutaka

IPC分类号： F16H55/08 ,  F16H55/06

摘要： A gear keeping the bending stress at the dedendum from becoming locally high at the time of power transmission and thereby raising the dedendum bending strength is provided. The radius of curvature is maximum at a critical section position determined by the Hofer's 30° tangent method. Both of the radii of curvature from the critical section position to the first and second connecting points X1 and Y1 are constant or decreasing. In the dedendum line segment 23, there are the points A1 and B1 where the radius of curvature is smaller than the critical section position. In the dedendum line segment 23, the maximum radius of curvature is 3 times or less the minimum radius of curvature. By a cross-sectional view, the critical section position is part of an arc, and the arc extends to the two sides of the critical section position. Due to this, the maximum bending stress becomes smaller and improvement of the dedendum bending strength can be realized.

摘要翻译： 提供一种保持齿根弯曲应力不会在动力传递时局部变高的齿轮，从而提高齿根弯曲强度。 曲率半径在由霍费尔30°切线方法确定的临界截面位置处是最大的。 从临界截面位置到第一和第二连接点X1和Y1的曲率半径都是恒定的或者减小的。 在齿根线段23中，存在曲率半径小于临界截面位置的点A1和B1。 在齿根线段23中，最大曲率半径是最小曲率半径的3倍或更小。 通过横截面图，临界截面位置是弧的一部分，并且弧延伸到临界截面位置的两侧。 由此，最大弯曲应力变小，能够实现齿根弯曲强度的提高。