Rotor member, rotor and electric motor
AssigneeFanuc Corporation
InventorYouhei ARIMATSU
Life of this patent
Estimating the term…
Abstract
In a rotor member fixed by press-fitting to a rotary shaft part of an electric motor, the inner circumferential face of a sleeve part has an inner circumferential tapered face in which the inside diameter of the sleeve part continuously increases at a fixed ratio in a direction from a first end towards a second end. In addition, an outer circumferential face of the sleeve part has an outer circumferential tapered face in which the outside diameter of the sleeve part continuously decreases at a fixed ratio in a direction from the first end towards the second end in an axial-direction segment of the sleeve part in which at least the inner circumferential tapered face is present.
Claims3
A rotor member which is fixed by press-fitting to a rotary shaft part of an electric motor, the rotor member comprising:
- a cylindrical sleeve part having a first end at an axial-direction first side thereof, and a second end at an axial-direction second side thereof;
- a plurality of magnet segments that are arranged to align in a circumferential direction at an outer side in the radial direction of the sleeve part;
- and
- a cylindrical member that covers the plurality of the magnet segments from an outer side in the radial direction, and sandwiches the plurality of the magnet segments with the sleeve part,
- wherein an inner circumferential face of the sleeve part has an inner circumferential tapered face in which the inside diameter of the sleeve part continuously increases at a fixed ratio in a direction from the first end towards the second end, and
- wherein an outer circumferential face of the sleeve part has an outer circumferential tapered face in which the outside diameter of the sleeve part continuously decreases at a fixed ratio in a direction from the first end towards the second end, in an axial-direction segment of the sleeve part in which at least the inner circumferential tapered face is present.
Dependencies are inferred from the claim text.