Motor rotor, supercharger, and method of manufacturing motor rotor
AssigneeIHI Corporation
InventorTakuya OZASA
Life of this patent
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Abstract
A motor rotor is configured to include a tubular inner sleeve, an annular magnet mounted on the outside of the inner sleeve in a radial direction of the inner sleeve, and a ring member disposed on the outside of the magnet in an axial direction of the inner sleeve and mounted on the outside of the inner sleeve in the radial direction of the inner sleeve. A linear expansion coefficient of the inner sleeve is higher than the linear expansion coefficient of the magnet. The ring member is mounted on the inner sleeve by shrinkage-fitting, and a gap is provided between the ring member and the magnet in the axial direction of the inner sleeve.
Claims5
A motor rotor comprising:
- a tubular inner sleeve;
- an annular magnet mounted on the outside of the inner sleeve in a radial direction of the inner sleeve;
- and
- a ring member disposed on the outside of the magnet in an axial direction of the inner sleeve and mounted on the outside of the inner sleeve in the radial direction of the inner sleeve,
- wherein a linear expansion coefficient of the inner sleeve is higher than the linear expansion coefficient of the magnet,
- the ring member is mounted on the inner sleeve by shrinkage-fitting, and
- a gap is provided between the ring member and the magnet in the axial direction of the inner sleeve.
A method of manufacturing a motor rotor including:
- a tubular inner sleeve;
- an annular magnet mounted on the outside of the inner sleeve in a radial direction of the inner sleeve;
- and
- a ring member disposed on the outside of the magnet in an axial direction of the inner sleeve and mounted on the outside of the inner sleeve in the radial direction of the inner sleeve,
- a linear expansion coefficient of the inner sleeve being higher than the linear expansion coefficient of the magnet,
- the method of manufacturing the motor rotor comprising:
- a step of inserting the inner sleeve through an opening portion of the magnet and mounting the magnet on the inner sleeve;
- and
- a step of inserting the inner sleeve through the opening portion of the ring member, disposing the ring member so as to be adjacent to the magnet in the axial direction of the inner sleeve, and shrink-fitting the ring member to the inner sleeve,
- wherein, in the step of shrink-fitting the ring member, a gap is provided between the ring member and the magnet in the axial direction of the inner sleeve to shrink-fit the ring member.
Dependencies are inferred from the claim text.