Method for manufacturing rotor core
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsMasaaki Takemoto, Takasuke Shikida
Life of this patent
Estimating the term…
Abstract
A rotor core is manufactured by forming thin plate-like core pieces including holes, forming a lamination body including insertion holes by laminating the core pieces, and inserting and embedding a permanent magnet in each of the insertion holes of the lamination body. The holes of each core piece include one or more first holes, in each of which a position determining portion for determining the position of the permanent magnet is formed, and one or more second holes, in which a position determining portion is not formed. Each insertion hole of the lamination body is formed by overlapping first holes of some of the core pieces and second holes of the remaining core pieces.
Claims14
A method for manufacturing a rotor core comprising:
- forming thin plate-shaped core pieces, each having a plurality of holes;
- forming a lamination body including a plurality of insertion holes by laminating the core pieces in a stacking position, the plurality of insertion holes being formed by said plurality of holes in each of said core pieces in the stacking position;
- and
- inserting and embedding a permanent magnet in each of the insertion holes of the lamination body, wherein
- the plurality of holes of each core piece include one or more first holes, in each of the one or more first holes a position determining portion for determining a position of a corresponding inserted permanent magnet is formed, and one or more second holes of the plurality of holes, in each of the one or more second holes a position determining portion is not formed, each of the one or more first holes and each of the one or more second holes accommodating a corresponding inserted permanent magnet, and
- each of the plurality of insertion holes of the lamination body has at least one of the first holes and at least one of the second holes such that each of the plurality of insertion holes is correspondingly formed by the at least one of the first holes and the at least one of the second holes of each of the core pieces in the stacking position.
Dependencies are inferred from the claim text.