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US 7,028,386 B2Granted
Rotor body and production method thereof
AssigneeNissan Motor Co., Ltd.
InventorsTakashi Kato, Haruyoshi Kumura, Masaki Nakano, Toshikazu Oshidari, Yuji Gotou, Hirofumi Shimizu
Life of this patent
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Abstract
A rotor body according to the present invention comprises an annular laminated core of electromagnetic steel sheets defining therein a plurality of apertures in which permanent magnets are to be fixed, respectively, and a cylindrical core support to support the core, wherein the laminated core and the core support are joined to each other by brazing.
Claims3
A method for producing a rotor body, comprising:
- providing a subassembly of an annular laminated core of electromagnetic steel sheets, a cylindrical core support and a brazing material meltable at or below a raised temperature;
- and
- heat treating the subassembly at the raised temperature to anneal the laminated core and the core support and to join the laminated core and the core support together by the brazing material, and
- wherein the laminated core is formed with axially extending and spaced cuts, and said providing includes engaging the laminated core and the core support with each other so that the cuts define spaces between the laminated core and the core support and inserting wires of brazing material into the respective spaces between the laminated core and the core support.
1 more element
Dependencies are inferred from the claim text.