| US 7,541,711 B2 | ||
| Electric motor, stator of electric motor, and manufacturing method for the stator | ||
| Taku Adaniya, Kariya (Japan); Minoru Mera, Kariya (Japan); Hideo Nakai, Nisshin (Japan); and Kenji Hiramoto, Aichi-ken (Japan) | ||
| Assigned to Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi (Japan) | ||
| Filed on May 29, 2007, as Appl. No. 11/807,886. | ||
| Claims priority of application No. 2006-150413 (JP), filed on May 30, 2006. | ||
| Prior Publication US 2007/0290567 A1, Dec. 20, 2007 | ||
| Int. Cl. H02K 1/18 (2006.01); H02K 1/14 (2006.01); H02K 1/16 (2006.01) | ||
| U.S. Cl. 310—218 [310/217; 310/259] | 4 Claims |
| 1. A stator of an electric motor, comprising:
a plurality of teeth each having a tooth main body and a tooth reinforcing portion, the tooth main body being formed of a
powder magnetic core material, and the tooth reinforcing portion being integrally molded with at least a part of a surface
of the tooth main body and being formed of metal having a higher mechanical strength than that of the tooth main body, and
surrounding a proximal portion in rectangular shape;
coils each being wound about one of the teeth; and
a yoke having fitting openings each receiving one of the teeth, wherein the yoke includes a yoke main body made of a powder
magnetic core material and yoke reinforcing portions each provided on at least a part of a wall surface defining one of the
fitting openings, the yoke reinforcing portion being molded integrally with the yoke main body and being formed of metal having
a higher mechanical strength than that of the yoke main body, and wherein each tooth is fitted to the corresponding fitting
opening in such a manner that the tooth reinforcing portion contacts the corresponding yoke reinforcing portion.
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