US 12,170,473 B2
Shaft and rotating machine
Shinhaku Sho, Tokyo (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/568,704
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Jun. 9, 2022, PCT No. PCT/JP2022/023262
§ 371(c)(1), (2) Date Dec. 8, 2023,
PCT Pub. No. WO2022/260123, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 2021-097520 (JP), filed on Jun. 10, 2021.
Prior Publication US 2024/0266909 A1, Aug. 8, 2024
Int. Cl. H02K 7/00 (2006.01); F16C 3/02 (2006.01); H02K 5/173 (2006.01); H02K 7/08 (2006.01)
CPC H02K 7/003 (2013.01) [F16C 3/02 (2013.01); H02K 5/1732 (2013.01); H02K 7/083 (2013.01); F16C 2380/26 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A shaft comprising: a supported portion that is rotatably supported by a bearing; and a large-diameter portion that is disposed closer to a center in an axial direction than the supported portion is, is adjacent to the supported portion, and has a larger diameter than the supported portion, the bearing being disposed such that a side surface of the bearing faces and comes close to an end face of the large-diameter portion on a side of the supported portion, the shaft being configured to rotate integrally with a rotor while holding the rotor, wherein
a cross-sectional shape of a boundary portion between the supported portion and the large-diameter portion in a longitudinal section of the shaft is formed in an arc shape that, on an outer side in the axial direction with respect to a virtual rising point, the virtual rising point being given when a rising angle of the large-diameter portion from the supported portion is assumed to be a right angle, has a radius of curvature larger than a radius of curvature of a concave corner formed by an outer edge of the supported portion and the end face of the large-diameter portion and is recessed inward in a radial direction of the supported portion.