公开(公告)号：US07004637B1

公开(公告)日：2006-02-28

申请号：US11035766

申请日：2005-01-14

申请人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

发明人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

IPC分类号： F16C13/00 ,  F16C43/00

CPC分类号： C22C38/28 ,  B60B27/00 ,  C21D9/40 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  F16C19/185 ,  F16C19/186 ,  F16C33/64 ,  F16C2326/02 ,  Y10S384/913 ,  Y10T29/49679

摘要： In a wheel-support rolling bearing unit, in order to made a flange 6 thinner and thus lighten the bearing unit without impairing fatigue strength, machinability, and workability after forging, the composition of the alloy steel constituting the flange attached member (hub ring 2), the surface hardness of the root portion 14 on the axial outside surface side of the flange 6, and the surface roughness, are stipulated to thereby improve the durability ratio (fatigue limit strength/tensile strength) of the flange 6. In one aspect, the member is made from an alloy steel containing C: 0.5 to 0.65 weight %, Mn: 0.3 to 1.5 weight %, Si: 0.1 to 1.0 weight %, Cr: 0.01 to 0.5 weight %, S: 0.35 weight % or less, and any one type or more selected from 0.01 to 0.2 weight % of V, 0.01 to 0.15 weight % of Nb, and 0.01 to 0.15 weight % of Ti, with the rest being Fe and inevitable impurities, and the oxygen contents is 15 ppm or less. Moreover, the surface hardness of the inner raceway 7a formed with the hardened layer, is between Hv 650 and 780, and the surface hardness of a portion not formed with the hardened layer is between Hv 230 and 300.

摘要翻译： 在车轮支承滚动轴承单元中，为了使凸缘6更薄，从而减轻轴承单元，而不损害锻造后的疲劳强度，机械加工性和可加工性，构成凸缘连接构件（轮毂环2 ），规定法兰6的轴向外表面侧的根部14的表面硬度和表面粗糙度，从而提高凸缘6的耐久性（疲劳极限强度/拉伸强度）。 一方面，该构件由C：0.5〜0.65重量％，Mn：0.3〜1.5重量％，Si：0.1〜1.0重量％，Cr：0.01〜0.5重量％，S：0.35重量％ 以下，V：0.01〜0.2重量％，Nb：0.01〜0.15重量％，Ti：0.01〜0.15重量％，其余为Fe和不可避免的杂质，氧含量为 15ppm以下。 此外，形成有硬化层的内侧滚道7a的表面硬度为Hv650〜780，未形成硬化层的部分的表面硬度为Hv 230〜300。

公开(公告)号：US20050141799A1

公开(公告)日：2005-06-30

申请号：US11035766

申请日：2005-01-14

申请人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

发明人： Hideyuki Uyama ,  Yuuji Miyamoto ,  Shigeru Okita

IPC分类号： B60B27/00 ,  B60B27/02 ,  B60B35/18 ,  C21D9/40 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/18 ,  C22C38/24 ,  F16C19/18 ,  F16C33/62 ,  F16C33/64 ,  F16C13/00 ,  F16C41/04 ,  F16C32/00

CPC分类号： C22C38/28 ,  B60B27/00 ,  C21D9/40 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  F16C19/185 ,  F16C19/186 ,  F16C33/64 ,  F16C2326/02 ,  Y10S384/913 ,  Y10T29/49679

摘要： In a wheel-support rolling bearing unit, in order to made a flange 6 thinner and thus lighten the bearing unit without impairing fatigue strength, machinability, and workability after forging, the composition of the alloy steel constituting the flange attached member (hub ring 2), the surface hardness of the root portion 14 on the axial outside surface side of the flange 6, and the surface roughness, are stipulated to thereby improve the durability ratio (fatigue limit strength/tensile strength) of the flange 6. In one aspect, the member is made from an alloy steel containing C: 0.5 to 0.65 weight %, Mn: 0.3 to 1.5 weight %, Si: 0.1 to 1.0 weight %, Cr: 0.01 to 0.5 weight %, S: 0.35 weight % or less, and any one type or more selected from 0.01 to 0.2 weight % of V, 0.01 to 0.15 weight % of Nb, and 0.01 to 0.15 weight % of Ti, with the rest being Fe and inevitable impurities, and the oxygen contents is 15 ppm or less. Moreover, the surface hardness of the inner raceway 7a formed with the hardened layer, is between Hv 650 and 780, and the surface hardness of a portion not formed with the hardened layer is between Hv 230 and 300.

摘要翻译： 在车轮支承滚动轴承单元中，为了使凸缘6更薄，从而减轻轴承单元，而不损害锻造后的疲劳强度，机械加工性和可加工性，构成凸缘连接构件（轮毂环2 ），规定法兰6的轴向外表面侧的根部14的表面硬度和表面粗糙度，从而提高凸缘6的耐久性（疲劳极限强度/拉伸强度）。 一方面，该构件由C：0.5〜0.65重量％，Mn：0.3〜1.5重量％，Si：0.1〜1.0重量％，Cr：0.01〜0.5重量％，S：0.35重量％ 以下，V：0.01〜0.2重量％，Nb：0.01〜0.15重量％，Ti：0.01〜0.15重量％，其余为Fe和不可避免的杂质，氧含量为 15ppm以下。 此外，形成有硬化层的内侧滚道7a的表面硬度为Hv650〜780，未形成硬化层的部分的表面硬度为Hv 230〜300。