Title:
BEARING APPARATUS FOR WHEEL
Document Type and Number:
WIPO Patent Application WO/2011/152497
Kind Code:
A1
Abstract:
Provided is a bearing apparatus for a wheel having first to third generation structures, in which an inner ring is fixed by oscillation staking of a hub ring. The bearing apparatus improves durability by suppressing deformation of the inner ring that accompanies the staking process and increases product quality by preventing generation of remaining black scale in a width grinding process for the inner ring. A bearing apparatus for a wheel in which an inner ring (3) is axially fixed by a staking part (2c) formed by plastic deformation of an end of a small-diameter step part (2b) in the outward radial direction, wherein an outer diameter part (a) of the inner ring (3) has a larger diameter than a pitch circle diameter (PCD) of a ball (6), and a chamfered part (12) is formed in the angle between the outer diameter part (a) and a large end surface (3b) of the inner ring (3). The chamfered part (12) comprises an arc surface (12b) and a tapered surface (12a) formed inclining from a position approximately 4 mm away from the outer diameter of the staking part (2c), and in addition the ratio of a grinding width (B) of the large end surface (3b) of the inner ring (3) to a grinding width (A) of a small end surface (3c) is B/A≤10, and the ratio of the grinding width (B) to a thickness (C) is B/C≤0.8.
Inventors:
INOUE, Yasuyuki (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
井上 靖之 (〒10 静岡県磐田市東貝塚１５７８番地 ＮＴＮ株式会社内 Shizuoka, 〒4388510, JP)
井上 靖之 (〒10 静岡県磐田市東貝塚１５７８番地 ＮＴＮ株式会社内 Shizuoka, 〒4388510, JP)
Application Number:
JP2011/062727
Publication Date:
December 08, 2011
Filing Date:
June 02, 2011
Export Citation:
Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
ＮＴＮ株式会社 (〒03 大阪府大阪市西区京町堀１丁目３番１７号 Osaka, 〒5500003, JP)
INOUE, Yasuyuki (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
ＮＴＮ株式会社 (〒03 大阪府大阪市西区京町堀１丁目３番１７号 Osaka, 〒5500003, JP)
INOUE, Yasuyuki (1578 Higashikaizuka, Iwata-sh, Shizuoka 10, 〒4388510, JP)
International Classes:
F16C33/58; B60B35/14; B60B35/18; F16C19/18; F16C35/07; F16C43/04
Attorney, Agent or Firm:
KOSHIKAWA, Takao (19F, Hamamatsu Act Tower 111-2, Itayamachi, Naka-ku, Hamamatsu-sh, Shizuoka 91, 〒4308691, JP)
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