DRIVE WHEEL BEARING UNIT AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2012/043706

A1

[Problem] To provide a drive wheel bearing unit and a method for manufacturing the same, the bearing unit being reduced in costs by reducing a cutting allowance and increased in the strength of a high-load portion to solve the mutually contradictory problem of achieving reduction in weight and enhancement in rigidity, thereby providing an elongated service life for the bearing. [Solution] A drive wheel bearing unit is adapted such that: a drive wheel mounting flange (6) is made up of a plurality of partial flanges (6a) which are divided in the circumferential direction; pilot portions (12) extend from the drive wheel mounting flange (6) towards the outer side and are provided with notches at a plurality of positions in the circumferential direction so as to be formed in the shape of intermittently projected pieces; the pilot portions (12) are each disposed between each of the partial flanges (6a); and a hub ring (4) is formed in two forging steps, i.e., by hot forging and thereafter by cold forging, in a manner such that at least the root portion of the drive wheel mounting flange (6) is cold forged.

UMEKIDA MITSURU (JP)
SHIBATA KIYOTAKE (JP)

PCT/JP2011/072345

April 05, 2012

September 29, 2011

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NTN TOYO BEARING CO LTD (JP)
UMEKIDA MITSURU (JP)
SHIBATA KIYOTAKE (JP)

B60B27/00; B21J3/00; B21J13/02; B21K1/40; B60B35/02; F16C19/18; F16C33/62; F16C33/64

JP2006123890A	2006-05-18
JP2008194742A	2008-08-28
JP2007152413A	2007-06-21
JP2006142916A	2006-06-08
JP2010089522A	2010-04-22
JP2010013039A	2010-01-21
JP2009255751A	2009-11-05
JP2008307563A	2008-12-25

KOSHIKAWA, TAKAO (JP)
Takao Koshikawa (JP)

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