Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1992-07-30
1993-12-21
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 42, 310 43, 310 45, 310235, H02K 1304
Patent
active
052724050
ABSTRACT:
A plate-like material is rounded in the form of a cylinder so as to form a main body of a commutator to which an end of a winding for an armature coil of an electric motor is electrically connected, and both ends of the plate-like material are opposed to each other so as to define a joint portion therebetween. When a molten soldering material is introduced into the joint portion and solidified therein, the joint point is closed by the soldering material, thereby making it possible to mold the main body of the commutator, which is shaped substantially in the form of a jointless cylinder. The commutator can be easily fabricated and the manufacturing cost thereof can also be reduced as compared with a case where the main body of the commutator is fabricated from a pipe-shaped material. Since the joint portion can reliably be closed, resin used to charge the inside of the main body of the commutator therewith at a subsequent step can be prevented from extruding toward the outside of the main body.
REFERENCES:
patent: 3302281 (1967-02-01), Freeman
patent: 3423819 (1969-01-01), Carlson et al.
patent: 3958326 (1976-05-01), Matsumoto et al.
patent: 4833769 (1989-05-01), Tomite
patent: 5122975 (1992-06-01), Luciani
patent: 5153979 (1992-10-01), Terada
Japanese Patent Application Laid-Open No. 63-265548, published Nov. 2, 1988.
Japanese Patent Application Laid-Open No. 63-265549, published Nov. 2, 1988.
Asmo Co. Ltd.
Skudy R.
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