发明名称 |
BEARING DEVICE FOR WHEEL AND MANUFACTURING METHOD THEREFOR |
摘要 |
A bearing device for a wheel includes an outer member having double-row outer raceway surfaces formed on an inner circumference thereof, an inner member including a hub wheel having a wheel mounting flange formed thereon and at least one inner race fitted to a small-diameter step portion formed on an outer circumference of the hub wheel, the inner member having double-row inner raceway surfaces formed thereon so as to be opposed to the double-row outer raceway surfaces, and a plurality of rolling elements in spaces between the double-row inner and outer raceway surfaces. The at least one inner race being fixed in an axial direction thereof by a staked portion, the staked portion having a face spline formed on an end surface thereof by plastic working |
申请公布号 |
US2015231920(A1) |
申请公布日期 |
2015.08.20 |
申请号 |
US201314434192 |
申请日期 |
2013.09.13 |
申请人 |
MATSUNAGA Hiroshi;TOSAJI Masahiro;NTN CORPORATION |
发明人 |
Matsunaga Hiroshi;Tosaji Masahiro |
分类号 |
B60B27/00;C21D9/40;B21D53/10;F16C33/64 |
主分类号 |
B60B27/00 |
代理机构 |
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代理人 |
|
主权项 |
1. A bearing device for a wheel, comprising:
an outer member having double-row outer raceway surfaces formed on an inner circumference thereof; an inner member comprising:
a hub wheel having a wheel mounting flange formed thereon; andat least one inner race fitted to a small-diameter step portion formed on an outer circumference of the hub wheel,the inner member having double-row inner raceway surfaces formed thereon so as to be opposed to the double-row outer raceway surfaces; and a plurality of rolling elements assembled into spaces between the double-row outer raceway surfaces and the double-row inner raceway surfaces, the at least one inner race being fixed in an axial direction thereof by a staked portion formed by plastically deforming an end portion of the small-diameter step portion of the hub wheel radially outward, the staked portion having a face spline formed on an end surface thereof by plastic working, wherein the following relationship is satisfied:
S/M≦α×βwhere M represents a mean diameter of an outer diameter and an inner diameter of the end portion of the small-diameter step portion of the hub wheel before the staked portion is formed, S represents an outer diameter of the face spline, α represents a value indicating ductile elongation of a material for the hub wheel in terms of proportion, and β represents a correction coefficient depending on a type of process. |
地址 |
US |