Metal working – Method of mechanical manufacture – Electrical device making
Patent
1987-06-12
1988-12-27
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
310154, H02K 1514
Patent
active
047930543
ABSTRACT:
A permanent magnet motor for use in such electrically-powered devices as appliances, power tools, and the like includes a longitudinally-split cylindrical ferromagnetic wrapper having an inner diameter normally less in its free state than the outer cross-sectional dimension of a permanent magnet array. During assembly of the motor, the split wrapper is expanded to fit around the magnet array, and then is allowed to contract to urge the magnet array radially inwardly against cooperating surfaces formed on each of two end caps. This maintains a predetermined orientation or alignment of the magnet array relative to the armature, including, for example, a predetermined air gap between the magnet array and the armature. Accordingly, the conventional requirement for such additional retention mechanisms as spring clips, adhesives, fasteners, and the like, is eliminated. The split wrapper also automatically aligns the respective bore axes of the end caps with respect to each other and with respect to an armature axis, regardless of any pre-existing axial misalignment of the edges defining the split in the wrapper. This automatic alignment enhances the lives of bearings mounted in the end cap bores. Another feature of the permanent magnet motor of the present invention is that it permits the use of multi-function, unitary end caps, namely those which not only contain motor element alignment features, but also one or more integral electrical and mechanical connection features.
REFERENCES:
patent: 2513226 (1950-06-01), Wylie
patent: 3023332 (1962-02-01), St. Charles
patent: 3165654 (1965-01-01), Mabuchi
patent: 3234417 (1966-02-01), Somers et al.
patent: 3401281 (1968-09-01), Martin et al.
patent: 3422295 (1969-01-01), Parker
patent: 3445693 (1969-05-01), Crenshaw et al.
patent: 3489937 (1970-01-01), Maher et al.
patent: 3500090 (1970-03-01), Baermann
patent: 3878802 (1975-04-01), Schmitt et al.
patent: 4071794 (1978-01-01), Schoen
patent: 4074159 (1978-02-01), Robison
patent: 4125791 (1978-11-01), Futterer
patent: 4335323 (1982-06-01), Kebbon et al.
patent: 4443934 (1984-04-01), Hickey
patent: 4505031 (1985-03-01), Colwell et al.
patent: 4682066 (1987-07-01), Abbratozzato et al.
Abbratozzato Salvatore R.
Walter Richard T.
Wheeler Dale K.
Black & Decker Inc.
Dearing Dennis A.
Goldberg Howard N.
Murphy Edward M.
Ross Taylor J.
LandOfFree
Alignment system for permanent magnet motors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alignment system for permanent magnet motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alignment system for permanent magnet motors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-860007