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    Method of manufacturing a hollow power transmission shaft
    1.
    发明公开
    Method of manufacturing a hollow power transmission shaft 有权
    Verfahren zur Herstellung einer hohlen Antriebswelle

    公开(公告)号：EP1974837A2

    公开(公告)日：2008-10-01

    申请号：EP08012227.8

    申请日：2005-07-21

    申请人： NTN Corporation

    发明人： Sakurai, Katsuhiro, c/o NTN Corporation ,  Nakagawa, Toru, c/o NTN Corporation ,  Shinbo, Masamichi, c/o NTN Corporation ,  Yamaguchi, Masami, c/o NTN Corporation ,  Hiraoka, Tsuneaki, c/o NTN Corporation

    IPC分类号： B21J5/02 ,  B21J5/12 ,  F16C3/02

    CPC分类号： F16C3/02 ,  B21J5/12 ,  B21K1/12 ,  F16C2326/06

    摘要： A hollow shaft material (1') is provided with, on an outer peripheral surface (1g) side thereof, for example, a movable induction heating coil (5) wrapped therearound. While a high-frequency current with a predetermined frequency is caused to flow through the induction heating coil (5), the induction heating coil (5) is axially moved to perform induction hardening of the hollow shaft material (1') from the outer peripheral surface (1g) side. At this moment, the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively low as to the small-diameter portions (1b), which have a relatively small thickness, and the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively high as to the large-diameter portion (1a), which has a relatively small thickness.

    摘要翻译： 一种制造中空动力传递轴的方法，该中空动力传动轴具有沿其轴向中心部分形成的大直径部分和小直径部分，其分别在其端部形成有花键，沿其轴向相对的侧部形成，小直径部分 相对于大直径侧向定位，所述方法包括：绘制管材以形成具有所述大直径部分和所述小直径部分的中空轴材料; 制备在其内周上具有花键模制部分的骰子，该花键模制部分的最大直径大于中空轴材料的小直径部分的端部的外径，并且其最小直径小于端部的外径 的中空轴材料的小直径部分; 并将中空轴材料的小直径部分的端部轴向压配合到骰子的花键模制部分中，以分别在端部处模制花键。

    Hollow power transmission shaft
    3.
    发明公开
    Hollow power transmission shaft 有权
    Hohle Antriebswelle

    公开(公告)号：EP1975423A2

    公开(公告)日：2008-10-01

    申请号：EP08012228.6

    申请日：2005-07-21

    申请人： NTN Corporation

    发明人： Sakurai, Katsuhiro, c/o NTN Corporation ,  Nakagawa, Toru, c/o NTN Corporation ,  Shinbo, Masamichi, NTN Corporation ,  Yamaguchi, Masami, c/o NTN Corporation ,  Hiraoka, Tsuneaki, c/o TNT Corporation

    IPC分类号： F16C3/02

    CPC分类号： F16C3/02 ,  B21J5/12 ,  B21K1/12 ,  F16C2326/06

    摘要： A hollow shaft material (1') is provided with, on an outer peripheral surface (1g) side thereof, for example, a movable induction heating coil (5) wrapped therearound. While a high-frequency current with a predetermined frequency is caused to flow through the induction heating coil (5), the induction heating coil (5) is axially moved to perform induction hardening of the hollow shaft material (1') from the outer peripheral surface (1g) side. At this moment, the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively low as to the small-diameter portions (1b), which have a relatively small thickness, and the frequency of the high-frequency current caused to flow through the induction heating coil (5) is set relatively high as to the large-diameter portion (1a), which has a relatively small thickness.

    摘要翻译： 一种空心动力传递轴，包括：沿其轴向中心部分形成的大直径部分; 小直径部分沿其轴向相对的横向部分形成，并且相对于大直径部分横向设置; 以及沿着其内周形成的中空部，其中，所述中空部填充有树脂发泡体以被所述树脂泡沫密封。

    Power transmission shaft
    4.
    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

    发明人： Sakurai, Katsuhiro, c/o NTN Corporation ,  Yamazaki, Kisao, c/o NTN Corporation

    IPC分类号： F16C3/00

    CPC分类号： C21D9/28 ,  C21D1/10 ,  C21D7/06 ,  C21D2221/00 ,  F16C3/02 ,  F16D3/20 ,  F16D2300/10 ,  Y02P10/253 ,  Y10S29/049

    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。

    Method of manufacturing a hollow power transmission shaft
    5.
    发明公开
    Method of manufacturing a hollow power transmission shaft 有权
    制造空心动力传动轴的方法

    公开(公告)号：EP1974837A3

    公开(公告)日：2008-10-15

    申请号：EP08012227.8

    申请日：2005-07-21

    申请人： NTN Corporation

    发明人： Sakurai, Katsuhiro, c/o NTN Corporation ,  Nakagawa, Toru, c/o NTN Corporation ,  Shinbo, Masamichi, c/o NTN Corporation ,  Yamaguchi, Masami, c/o NTN Corporation ,  Hiraoka, Tsuneaki, c/o NTN Corporation

    IPC分类号： B21J5/02 ,  B21J5/12 ,  F16C3/02

    CPC分类号： F16C3/02 ,  B21J5/12 ,  B21K1/12 ,  F16C2326/06

    摘要： A method of producing a hollow power transmission shaft having a large-diameter portion formed along an axially central portion thereof and small-diameter portions, which have splines formed at ends thereof respectively, formed along axially opposite lateral portion thereof, the small-diameter portions being located laterally with respect to the large-diameter, the method comprising:
    Drawing a pipe material to form a hollow shaft material having the large-diameter portion and the small-diameter portions;
    preparing a dice having on an inner periphery thereof a spline molding portion, whose maximum diameter is larger than an outer diameter of the ends of the small-diameter portions of the hollow shaft material and whose minimum diameter is smaller than the outer diameter of the ends of the small-diameter portions of the hollow shaft material; and
    axially press-fitting the ends of the small-diameter portions of the hollow shaft material into the spline molding portion of the dice to mold the splines at the ends respectively.

    摘要翻译： 一种制造中空传动轴的方法，该中空传动轴具有沿其轴向中心部分形成的大直径部分和沿其轴向相对的横向部分形成的分别在其端部形成有花键的小直径部分，小直径部分 所述方法包括：拉拔管材以形成具有所述大直径部分和所述小直径部分的中空轴材料; 准备在内周具有花键成形部的模具，该花键成形部的最大直径比中空轴材料的小径部的端部的外径大，并且最小直径比端部的外径小 中空轴材料的小直径部分; 并将中空轴材料的小直径部分的端部轴向压入模具的花键模制部分，以分别在端部模制花键。

    Power transmission shaft
    6.
    发明公开
    Power transmission shaft 审中-公开
    动力传动轴

    公开(公告)号：EP1531276A3

    公开(公告)日：2006-02-01

    申请号：EP04256924.4

    申请日：2004-11-09

    申请人： NTN CORPORATION

    发明人： Sakurai, Katsuhiro, c/o NTN Corporation ,  Yamazaki, Kisao, c/o NTN Corporation

    IPC分类号： F16D3/20 ,  F16C3/02

    CPC分类号： C21D9/28 ,  C21D1/10 ,  C21D7/06 ,  C21D2221/00 ,  F16C3/02 ,  F16D3/20 ,  F16D2300/10 ,  Y02P10/253 ,  Y10S29/049

    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： 本发明的目的在于提供一种提高花键轴等传递扭矩的锯齿部的传动轴的强度，特别是疲劳强度的技术。 动力传递轴与各等速万向节（2,3）的内侧接头部件锯齿嵌合。 驱动轴（1）具有锯齿部分（A）以及具有圆柱形外圆周表面（4a）的光滑部分（B）。 切割部分（13）形成在锯齿部分（A）的端部。 当对平滑部分（B）和锯齿部分（A）进行高频淬火时，平滑部分（B）的硬化率设定为与锯齿部分（A）不同的值，并且使得 平滑部分（A）的疲劳强度变得等于或大于锯齿状部分（A）的疲劳强度。