Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-09-12
1995-10-17
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 40MM, 310 42, H02K 2300, H02K 500
Patent
active
054593654
ABSTRACT:
A miniature motor including a case formed into a bottomed hollow tubular shape having a permanent magnet, an end cap fitted to an open end of the case, and a rotor having an armature iron core and a commutator. A sleeve made of a resin material and formed into a hollow cylindrical shape is fitted coaxially with the core constituting the armature iron core and the commutator, with a gap provided on at least one end face of the sleeve; a plurality of grooves facing at least an end face of the sleeve are provided on the iron core and the commutator at certain spacings in the circumferential direction; a projection for press-fitting to any one of the grooves is provided each on both end faces of the sleeve integrally with the sleeve; and a groove extending along the axial line of the sleeve is provided in the middle part of these projections.
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patent: 5157299 (1992-10-01), Gerlach
patent: 5272404 (1993-12-01), Yuhi et al.
patent: 5369326 (1994-11-01), Strobl
Dougherty Thomas M.
Mabuchi Motor Co. Ltd.
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