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Title:
WHEEL BEARING DEVICE WITH ROTATIONAL SPEED DETECTOR
Document Type and Number:
WIPO Patent Application WO/2012/077685
Kind Code:
A1
Abstract:
[Problem] To provide a wheel bearing device with a rotational speed detector, with which a magnetic encoder is shielded and protected from the outside of a bearing by means of a protection cover, and with which workability and ease of assembly are increased while the rigidity of the protection cover is increased and deformations are limited. [Solution] A wheel bearing device with a rotational speed detector in which a protection cover (15) is attached to an inner end part of an inner wheel (5) to seal a detection unit, wherein the protection cover (15) comprises: a cylindrical fitting part (15a) which is fixed to a small-diameter part (16) of the inner wheel (5) by press fitting; a circular plate part (15b) which extends outward from the cylindrical fitting part (15a) in the radial direction and is folded against itself; and a bottom part (15d) which closes an end part of an inner member (1) by way of a cylinder part (15c) having a diameter smaller than that of the cylindrical fitting part (15a). A tip end part of the circular plate part (15b) faces the inner peripheral surface of a knuckle (K) with a small radial gap therebetween so as to form a labyrinth seal (17), and the circular plate part (15b) is formed having an angle of inclination (θ) of 5° to 15° from the inner side toward the tip end.

Inventors:
BABA TOMOKO (JP)
SEKI MAKOTO (JP)
Application Number:
PCT/JP2011/078206
Publication Date:
June 14, 2012
Filing Date:
December 06, 2011
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
BABA TOMOKO (JP)
SEKI MAKOTO (JP)
International Classes:
B60B35/02; F16C19/18; F16C33/78; F16C33/80; F16C41/00; G01P3/487
Domestic Patent References:
WO2010013439A12010-02-04
Foreign References:
JP2010230080A2010-10-14
JP4371429B22009-11-25
JP2010065800A2010-03-25
JP2007100715A2007-04-19
JP2010032013A2010-02-12
JP2009126416A2009-06-11
JP2005344901A2005-12-15
JP4442457B22010-03-31
JP2009068670A2009-04-02
JP2010106909A2010-05-13
JP2010125866A2010-06-10
Attorney, Agent or Firm:
KOSHIKAWA, TAKAO (JP)
Takao Koshikawa (JP)
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Claims: