公开(公告)号：EP1262671B1

公开(公告)日：2007-01-17

申请号：EP02253695.7

申请日：2002-05-27

申请人： NTN CORPORATION

发明人： Wakita, Kazuya ,  Ikei, Katsuyuki ,  Kura, Hisaaki

IPC分类号： F16C3/02

CPC分类号： B21K1/12 ,  B21K1/063 ,  C21D9/28 ,  F16C3/02 ,  F16C2204/62 ,  F16C2326/06 ,  Y10S148/909 ,  Y10T428/12965

公开(公告)号：EP1262671A1

公开(公告)日：2002-12-04

申请号：EP02253695.7

申请日：2002-05-27

申请人： NTN CORPORATION

发明人： Wakita, Kazuya ,  Ikei, Katsuyuki ,  Kura, Hisaaki

IPC分类号： F16C3/02

CPC分类号： B21K1/12 ,  B21K1/063 ,  C21D9/28 ,  F16C3/02 ,  F16C2204/62 ,  F16C2326/06 ,  Y10S148/909 ,  Y10T428/12965

摘要： A power transmission shaft having an improved strength and ensuring a stable torsion fatigue strength. The power transmission shaft has coupling members respectively provided on the opposite ends of an pipe part made of a steel material. The steel material includes 0.30-0.45% by weight of C, 0.05-0.35% by weight of Si, 1.0-2.0% by weight of Mn, 0.05% by weight or less of Al, 0.01% by weight or less of S, and the remainder (iron Fe and unavoidable impurities). The pipe part has an electro-unite portion that extends in the axial direction. The electro-unite portion and neighborhood thereof are hardened so as to have a Rockwell hardness HRC of 45 or more. Also, another power transmission shaft has coupling members integrally formed on opposite ends thereof. In addition, the shaft is formed from a steel element tube by a plastic working. The shaft has an inner diametrical surface which is subjected to a high-frequency induction hardening and tempering treatment to make the surface portion hardness of the inner diametrical surface to have a Rockwell hardness HRC of 35 or more.

摘要翻译： 一种动力传递轴，具有改善的强度并确保稳定的扭转疲劳强度。 动力传递轴具有分别设置在由钢材制成的管部的相对端上的联接构件。 钢材含有0.30-0.45重量％的C，0.05-0.35重量％的Si，1.0-2.0重量％的Mn，0.05重量％以下的Al，0.01重量％以下的S，以及 余量（铁铁和不可避免的杂质）。 管部具有沿轴向延伸的电联合部。 电联合部分及其附近被硬化，使得洛氏硬度HRC为45以上。 此外，另一个动力传递轴具有一体地形成在其相对两端的联接构件。 此外，轴由塑料加工的钢质元件管形成。 轴具有内径面，经受高频感应淬火和回火处理，使得内径表面的表面部分硬度具有35以上的洛氏硬度HRC。