BALL BEARING

WIPO Patent Application WO/2023/238222

A1

A ball bearing 30 includes an inner ring 31, an outer ring 32, a plurality of balls 33, a crown-shape holder 34, and a shield 40. The inner ring 31 is fixed to a shaft 20a of non-rotatable case 20, and the outer ring 32 is fixed to a rotatable output member 14. The inner ring 31 includes, on an outer periphery surface, a first cylinder surface 31a extending from a side surface 31e to a second side of a shaft direction, a first step surface 31b that extends from the first cylinder surface 31a outward in a radial direction, a second cylinder surface 31c that extends from the first step surface 31b to the second side of the shaft direction, and an inner ring raceway groove 31d that extends from the second cylinder surface 31c to the second side of the shaft direction and inward in the radial direction. The shield 40 includes a fixed part 41a that is fixed to the outer ring 32, and an annular part 41b that extends from the fixed part 41a inward in the radial direction. An edge portion 41c on the second side of the shaft direction and inward in the radial direction of the annular part 41b overlaps the second cylinder surface 31c in a range of the shaft direction, and is also positioned more inward in the radial direction than a pitch diameter D of a ball set of the plurality of balls 33.

CHUDO RYOSUKE (JP)
YAMAMOTO TAKESHI (JP)

PCT/JP2022/022929

December 14, 2023

June 07, 2022

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JTEKT CORP (JP)

F16C33/76

JP2018162870A	2018-10-18
US4695062A	1987-09-22
JP2011021639A	2011-02-03

SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)

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