Rotor for brushless motor and brushless motor

Details Rotor for brushless motor and brushless motor Rotor for brushless motor and brushless motor

2008-05-13

2008-05-13

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S156210

Reexamination Certificate

active

07372181

ABSTRACT:
A rotor for a brushless motor which can securely prevent an idle running and a scattering of a magnet while restricting a manufacturing cost as low as possible. The rotor is provided with a sintered ring magnet in which not-ground recess portions are formed in an axial direction of a inner peripheral surface in correspondence to a magnetic pole, and a portion between the recess portions is ground in an inner peripheral surface having a desired inner diameter, a rotor yoke in which convex portions each having a larger diameter than the inner diameter of the sintered ring magnet are formed in an axial direction of an outer peripheral surface in correspondence to the recess portion, and a through hole is pierced in an axial center, and which is concentrically adhered to the sintered ring magnet by fitting the recess portions and the convex portions, and a shaft inserted and fitted to the through hole of the rotor yoke.

REFERENCES:
patent: 3502922 (1970-03-01), Welker
patent: 3826941 (1974-07-01), Folmar
patent: 4547758 (1985-10-01), Shimizu et al.
patent: 5786651 (1998-07-01), Suzuki
patent: 5881447 (1999-03-01), Molnar
patent: 6084330 (2000-07-01), Fisher et al.
patent: 6384502 (2002-05-01), Masuzawa et al.
patent: 6583530 (2003-06-01), Hsu
patent: 2001-178042 (2001-06-01), None
patent: 2003-174745 (2003-06-01), None
patent: WO9912248 (1999-03-01), None

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