Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-05-30
1998-08-11
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 29596, 29525, H02K 1514
Patent
active
057931291
ABSTRACT:
For a precision spindle motor, an invention for reducing distortion resulting from interference fits of a thrust plate to spindle motor shaft and of a counter plate to a journal. A method of assembly according to the invention includes the step of balancing an interference pressure about a centerline of at least one of the thrust plate and the counter plate of the spindle motor. A precision spindle motor according to the invention comprises a journal having a bore defined therein, a shaft located in the bore, a thrust plate mounted to a top portion of the shaft by means of an interference fit, and a counter plate mounted to the journal adjacent to the thrust plate by means of an interference fit, wherein an interference pressure is balanced about a centerline of at least one of the thrust plate and the counter plate.
REFERENCES:
patent: 4739427 (1988-04-01), Kilmer et al.
patent: 4828467 (1989-05-01), Brown
patent: 4920812 (1990-05-01), Okamoto et al.
patent: 5149111 (1992-09-01), Han
patent: 5313355 (1994-05-01), Hagen
patent: 5358339 (1994-10-01), Konno et al.
patent: 5666716 (1997-09-01), Parsoneault
Jennings David John
Leuthold Hans
Murthy Samnathan
Parsoneault Norbert Steven
Jones Judson H.
Seagate Technology Inc.
Stephan Steven L.
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