Title:
WHEEL BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/159804
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a wheel bearing device in which leakage of grease from the vicinity of rolling bodies toward a magnetic encoder is suppressed, thus enabling the amount of grease enclosed to be reduced. A wheel bearing device 1 includes: an outer ring 2, serving as an outer member, in which two outside rolling surfaces 2A are integrally formed; an inner member in which an inside rolling surface 4A is formed, the inner member including a hub ring 3 that has an integral wheel mounting flange 3B to which a wheel is mounted, and at least one inner ring 4 that is press-fitted to a small-diameter step part 3A of the hub ring 3; ball rows 5 that are accommodated in a freely rolling manner; a magnetic encoder 7 that is provided at an inner end of the inner member; and a bottomed-tube-shaped cover 11 fitted to an inner-side opening 2B of the outer member. In order to retain grease GR enclosed between the outer member and the inner member near the ball rows 5, an outside damming member 11D, which is formed of a ring-shaped elastic body extending radially inward, is provided at a side 11A of the cover 11.
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Inventors:
NAKATSUJI YUTA (JP)
NAGAI NATSUKO (JP)
NAGAI NATSUKO (JP)
Application Number:
PCT/JP2017/010730
Publication Date:
September 21, 2017
Filing Date:
March 16, 2017
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/76; B60B35/02; F16C19/18; F16C19/38; F16C33/66; F16C33/80; F16C41/00; F16J15/3204; F16J15/16
Foreign References:
| JP2010031994A | 2010-02-12 | |||
| JP2000249138A | 2000-09-12 | |||
| JP2011058522A | 2011-03-24 | |||
| JP2000198304A | 2000-07-18 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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