US 2024/0266909 A1 · SHAFT AND ROTATING MACHINE

Abstract

A shaft configured to suppress damage without having an increased diameter is provided. The shaft includes a supported portion supported by a bearing and an adjacent large-diameter portion larger in diameter than the supported portion and disposed closer to a center in an axial direction than the supported portion. The shaft is configured to rotate integrally with a rotor while holding the rotor. A sectional shape of a boundary portion between the supported portion and the large-diameter portion in a longitudinal section of the shaft is an arc shape that is, on an outer side in the axial direction with respect to a virtual rising point, recessed inward from an outer edge in the radial direction of the supported portion and raised outward in the radial direction from the outer edge, as the arc shape extends from the outer to an inner side in the axial direction.

Claims5

Dependent claims

1-4. (canceled)

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 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.

Dependencies are inferred from the claim text.

Facts

Application

18/568,704Filed 9 Jun 2022

Priority

JP 2021-09752010 Jun 2021

Published

8 Aug 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02K 7/003
Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical…:…
F16C 3/02
Shafts ; Axles; Cranks; Eccentrics: shafts; Axles
F16C 35/063
Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing: fixing them on the shaft
H02K 5/1732
Using bearings with rolling contact, e.g. ball bearings: radially supporting the rotary shaft at both ends of the rotor

Shaft and rotating machine

Life of this patent

Shaft and rotating machine

Life of this patent

Abstract

Claims5