Title:
SHAFT MEMBER FOR WHEEL ROLLING BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/121242
Kind Code:
A1
Abstract:
[Problem] To suppress localized concentration of stress (stress concentration) generated in a flange section, formed by cold forging, by the input of a load into the flange section, in a shaft member for a wheel rolling bearing device. [Solution] A flange section (21) formed by cold forging comprises an outward flange section (21d) and an inward flange section (21a). The inward flange section (21a) viewed in a shaft line direction cross-section is formed thicker than the outward flange section (21d) and the flange surface shape on the side where a bolt seat surface section is arranged is formed by having a vertical surface shape of a constant length in the radial direction at a radial direction base section position and by having an inclined surface (21c) shape that gradually becomes thinner from the vertical surface shape position towards the radially outward direction. A first flange surface joining position (21f) for the inclined surface (21c) and the outward flange section (21d) is formed as a convex curve section that surrounds a bolt hole (24) for a hub bolt (27), when viewed in the planar view from a shaft section (10) side.
Inventors:
MASUDA YOSHINORI (JP)
OKUMURA TSUYOSHI (JP)
OKUMURA TSUYOSHI (JP)
Application Number:
PCT/JP2012/055669
Publication Date:
September 13, 2012
Filing Date:
March 06, 2012
Export Citation:
Assignee:
JTEKT CORP (JP)
MASUDA YOSHINORI (JP)
OKUMURA TSUYOSHI (JP)
MASUDA YOSHINORI (JP)
OKUMURA TSUYOSHI (JP)
International Classes:
B60B27/00; B21K1/05; B60B35/02; F16C33/58
Foreign References:
| JP2010214467A | 2010-09-30 | |||
| JP2010281351A | 2010-12-16 | |||
| JP2008110659A | 2008-05-15 | |||
| JP2006111070A | 2006-04-27 | |||
| JP2008045718A | 2008-02-28 | |||
| JP2006111070A | 2006-04-27 | |||
| JP2008045718A | 2008-02-28 |
Attorney, Agent or Firm:
UENO, HIDEKI (JP)
Ueno Hideki (JP)
Ueno Hideki (JP)
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Claims: