Title:
BEARING DEVICE FOR WHEEL
Document Type and Number:
WIPO Patent Application WO/2007/010772
Kind Code:
A1
Abstract:
A bearing device for a wheel enabling an increase in the strength and the fatigue
strength of its flange for mounting the wheel or its flange for mounting a vehicle
body against high stress and repeated stress and the suppression of the lowering
of productivity due to the increase of the number of steps. The bearing device
for the wheel is applicable to a bearing device for a wheel comprising an inner
member (1) and an outer member (2) rotatable relative to each other through multiple
rows of rolling elements (3). A flange (17) for mounting the wheel is formed on
a part forming the overall or a part of the inner member (1) or the outer member (2),
for example, a hub (14). The part such as the hub (14) having the flange (17) for
mounting the wheel is manufactured by hot-forging a steel material. The part
is so formed that its base metal portion is formed in a standard structure and the
portion (30) of a non-standard structure is formed on the surface of the flange
(17) for mounting the wheel. The non-standard structure is formed of either of
a micro ferrite/perlite structure, an upper bainite structure, a lower bainite
structure, and a tempered martensite structure, or the mixed structure of at
least two or more of these structures. The portion (30) of the non-standard structure
may be formed on the flange (12) for mounting the vehicle body of the outer member
(2).
Inventors:
HIRAI ISAO (JP)
YOSHINO KOHEI (JP)
TAKUBO TAKAYASU (JP)
FUJIMURA AKIRA (JP)
OBATA TAKUYA (JP)
YOSHINO KOHEI (JP)
TAKUBO TAKAYASU (JP)
FUJIMURA AKIRA (JP)
OBATA TAKUYA (JP)
Application Number:
PCT/JP2006/313659
Publication Date:
January 25, 2007
Filing Date:
July 10, 2006
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
HIRAI ISAO (JP)
YOSHINO KOHEI (JP)
TAKUBO TAKAYASU (JP)
FUJIMURA AKIRA (JP)
OBATA TAKUYA (JP)
HIRAI ISAO (JP)
YOSHINO KOHEI (JP)
TAKUBO TAKAYASU (JP)
FUJIMURA AKIRA (JP)
OBATA TAKUYA (JP)
International Classes:
C21D9/40; B60B27/00; B60B35/02; C21D8/00; F16C19/18; F16C33/62; F16C33/64
Foreign References:
| JP2005003061A | 2005-01-06 | |||
| JP2005145313A | 2005-06-09 | |||
| JP2003300401A | 2003-10-21 | |||
| JP2004217003A | 2004-08-05 |
Other References:
See also references of EP 1908852A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (10-2 Edobori 1-chome, Nishi-k, Osaka-shi Osaka 02, JP)
Download PDF:
Previous Patent: OPTICAL PICKUP AND RECORDER/REPRODUCER OF OPTICAL INFORMATION RECORDING MEDIUM
Next Patent: CONTROLLER OF MOBILE ROBOT
Next Patent: CONTROLLER OF MOBILE ROBOT