Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1986-11-03
1988-07-26
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 42, 310 43, 310235, 403372, 403373, H02K 1310
Patent
active
047603011
ABSTRACT:
An improved commutator usable for an electric motor of the type adapted to be press fitted onto the support shaft of a rotor which is accommodated in the motor. The inner wall of the commutator comprises a plurality of larger diameter portions of which inner diameter is larger than the outer diameter of the support shaft and a plurality of press fitting portions of which inner diameter is smaller than the outer diameter of the support shaft. Press fitting of the commutator onto the support shaft is achieved by elastic bending deformation of the press fitting portions on the inner wall of the commutator in the outward direction. Typically, the inner wall of the commutator comprises three larger diameter portions and three press fitting portions. No preliminary machining is required on the inner wall of the commutator before press fitting is effected. The amount of press fitting allowance can be increased remarkably compared with any conventional commutator.
REFERENCES:
patent: 2831991 (1958-04-01), Perkins
patent: 3129350 (1964-04-01), Clark
patent: 3829722 (1974-08-01), Rosenthal, Jr. et al.
patent: 3983431 (1976-09-01), Hancock
patent: 4183104 (1980-01-01), Frey
patent: 4408140 (1983-10-01), Thompson
Iizima Masaki
Takahashi Toshio
Mitsuba Electric Manufacturing Co. Ltd.
Skudy R.
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