Spindle motor, and its rotor yoke manufacturing method

Details Spindle motor, and its rotor yoke manufacturing method Spindle motor, and its rotor yoke manufacturing method

1995-10-17

1998-04-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 360 9908, 360 9909, H02K 700

Patent

active

057448817

ABSTRACT:
A drive magnet unit is fixedly mounted on the inner cylindrical surface of the cylindrical portion of a rotor yoke which is fixedly mounted on a hub, in such a manner that the drive magnet unit confronts a stator core. The rotor yoke has an annular portion along its open end. The rotor yoke has a curved portion along the open end which forms a gap with the outer cylindrical surface of the drive magnet unit. The annular portion is sheared along its base, thus forming a shear plane. The inner surface of the bottom of the rotor yoke, and the inner cylindrical surface of the cylindrical portion of the rotor yoke form a right-angled portion with which the right-angled outer edge portion of the drive magnet unit is engaged. The peripheral surface of the right-angled portion defines a through-hole in the bottom which is engaged with the hub. The gap is filled with adhesive, to fixedly secure the drive magnet unit to the rotor yoke.

REFERENCES:
patent: 4259603 (1981-03-01), Uchiyama et al.
patent: 5057725 (1991-10-01), Kasai et al.
patent: 5128819 (1992-07-01), Elsaesser et al.
patent: 5227686 (1993-07-01), Ogawa
patent: 5252871 (1993-10-01), Inoue
patent: 5402023 (1995-03-01), Nakanishi et al.
patent: 5414575 (1995-05-01), Katakura
patent: 5446610 (1995-08-01), Elsaesser et al.
patent: 5457588 (1995-10-01), Hattori et al.

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