Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-12-17
1999-07-20
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310254, 310 51, 360 9908, 360 9912, G11B 17028
Patent
active
059259493
ABSTRACT:
A brushless DC motor for a disc drive having a base and a coil-wound stator secured to an upper portion of the base. One or more first stoppers are secured to the stator and a shaft is rotatably secured in a bearing forcibly inserted in a bore in the upper portion of the base. A hub of a rotor is secured to the shaft and a cylindrical wall extends downwardly at the rim of the hub and carries a magnet facing the stator with an air gap therebetween. A second stopper is secured to the rotor, to face the first stopper to retain the rotor in the axial direction. The second stopper has a flange over which the first stopper is placed with slight clearance. An elastomer rests on the first stopper and carries guides which extend in slots in the rotor to engage and center a hole in a disc.
REFERENCES:
patent: 4634908 (1987-01-01), Sturm
patent: 5264748 (1993-11-01), Ootsuka et al.
patent: 5446610 (1995-08-01), Elsaesser et al.
patent: 5623382 (1997-04-01), Moritan et al.
patent: 5633856 (1997-05-01), Mukawa
patent: 5668792 (1997-09-01), Choi
patent: 5723927 (1998-03-01), Teshima
patent: 5747908 (1998-05-01), Saneshige et al.
Jung Sung Cheon
Min Jin Ki
Imayoshi Tamai Karl E.
Ramirez Nestor
Samsung Electro - Mechanics Co., Ltd.
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