Title:
WHEEL BEARING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/079703
Kind Code:
A1
Abstract:
Provided is a wheel bearing device with which the ability of a drain hole to discharge foreign matter can be improved without increasing the size of a cover in the axial direction. This wheel bearing device (1) is equipped with: an inner member comprising an outer ring (2), a hub ring (3), and at least one inner ring (4) press-fitted into the hub ring (3); multiple rows of rolling bodies (5a/5b); a magnetic encoder (9) provided on an end portion of the inner ring (4); a cover (10) fitted onto the outer ring (2); and a magnetic sensor (11) provided on the cover (10). The cover (10) comprises a large-diameter cylindrical section (10a) fitted onto the outer ring (2), a step section (10b) protruding toward the inside in the radial direction and contacting an end surface of the outer ring (2), and a small-diameter cylindrical section (10c) extending in the axial direction from the step section (10b). A portion of the ground-surface side of the small-diameter cylindrical section (10c) forms a protruding circumferential surface (S), which is an arc shape protruding toward the outside in the radial direction and having the same radius as that of the large-diameter cylindrical section (10a), and a drain hole (10e) is formed in the protruding circumferential surface (S).
Inventors:
NAKA DAISUKE (JP)
Application Number:
PCT/JP2017/038873
Publication Date:
May 03, 2018
Filing Date:
October 27, 2017
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/76; B60B35/18; F16C41/00
Domestic Patent References:
| WO2011043266A1 | 2011-04-14 |
Foreign References:
| JP2011079512A | 2011-04-21 | |||
| JP2009097660A | 2009-05-07 | |||
| JP2013100855A | 2013-05-23 |
Attorney, Agent or Firm:
YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)
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