Title:
BEARING DEVICE FOR VEHICLE WHEEL
Document Type and Number:
WIPO Patent Application WO/2017/051836
Kind Code:
A1
Abstract:
Provided is a bearing device for a vehicle wheel in which a cap does not adversely affect sensing performance of a speed sensor, and desired detection accuracy with respect to the detection limit of the speed sensor can be ensured to improve reliability. This bearing device for a vehicle wheel is provided with a magnetic encoder 14 fitted over an internal wheel 5, the magnetic encoder 14 and a speed sensor being made to face each other across an air gap via a cap 10 mounted on the end of an outer member 2, wherein: the cap 10 is provided with a cylindrical fitting part 10a press-fitted into the inner periphery of the end of the outer member 2, and a discoid shielding part 10c extending radially inward, the speed sensor being brought near or in contact with a side surface of the shielding part 10c; the cap 10 is formed from an austenitic stainless steel plate containing SUS 304 as the base, the C content being set to 0.030% by weight or less and the Ni content being set to 9.00-13.00% by weight; and the difference in magnetic flux density between a martensitically transformed portion and a non-martensitic portion is set to 1.4 mT or less.
Inventors:
SUMA HIROTO (JP)
Application Number:
PCT/JP2016/077929
Publication Date:
March 30, 2017
Filing Date:
September 23, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16C33/76; B60B35/02; F16C19/18; F16C41/00
Foreign References:
| JP2012066661A | 2012-04-05 | |||
| JP2003082445A | 2003-03-19 |
Attorney, Agent or Firm:
KOSHIKAWA, Takao (JP)
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