Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-09-19
1996-03-05
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 89, 310156, H02K 700
Patent
active
054970407
ABSTRACT:
An outer rotor type brushless DC motor has: a first housing member formed of a sheet metal by press-working and having a first central bearing receiver also formed by press-working in the form of generally hollow cylinder; a second housing member formed from a sheet metal by press-working and having a second central bearing receiver also pressed in the form of generally hollow cylinder; a hollow cylindrical stator support formed of a sheet metal by press-working and having one end mounted on the first bearing receiver of the first housing member and another end for receiving the stator on the outer surface of the stator support; a magnets support press-worked from a electrical steel sheet metal for supporting magnets around the stator and inside the second housing member; a first bearing mounted in the first bearing receiver; a second bearing mounted in the second bearing receiver coaxially with the first bearing; and a freely rotatable shaft mounted on the first and second bearings, for firmly supporting thereon the stator support. The motor may be assembled in simple steps without any molding to suppress vibrations and noises. The motor has a suitable design for mass production.
REFERENCES:
patent: 3614495 (1971-10-01), Suzuki et al.
patent: 3676725 (1972-07-01), Wiser et al.
patent: 4017964 (1977-04-01), Schulte et al.
patent: 4829208 (1989-05-01), Uchino
patent: 5008573 (1991-04-01), Beppu et al.
patent: 5144183 (1992-09-01), Farrenkopf
patent: 5252873 (1993-10-01), Hamamoto et al.
Budd Mark O.
Sanyo Electric Co,. Ltd.
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