Rotor for rotary electric machine, and rotary electric machine that uses the rotor
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYoshitada Yamagishi
Life of this patent
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Abstract
A rotor for a rotary electric machine includes: a rotor shaft that is rotatably supported; and a rotor core that has a shaft hole in a central portion of the steel sheet stack, and that is tightened and fixed by thermal shrink fitting to a periphery of the rotor shaft inserted in the shaft hole, and that is made up of a stack of steel sheets. The rotor shaft has a reduced-interference portion at a position that corresponds to an end region of the rotor core in an axis direction of the rotor core, in a contact region of the rotor shaft which contacts an inner peripheral portion of the shaft hole of the rotor core.
Claims17
A rotor for a rotary electric machine, comprising:
- a rotor shaft;
- and
- a rotor core that is made up of a stack of steel sheets, and that has a shaft hole in a central portion of the stack of steel sheets, and that is tightened and fixed, by thermal shrink fitting, to a periphery of the rotor shaft inserted in the shaft hole, wherein
- the rotor shaft has a pressing-force distribution adjustment portion that reduces a difference in pressing force that is a reaction force to tightening force of the rotor core occurring during a state in which the rotor core is tightened and fixed to the rotor shaft between a position that corresponds to a middle portion of the rotor core in an axis direction of the rotor core and a position that corresponds to an end region of the rotor core in the axis direction.
A rotor for a rotary electric machine, comprising:
- a rotor shaft;
- and
- a rotor core that is made up of a stack of steel sheets, and that has a shaft hole in a central portion of the stack of steel sheets, and that is tightened and fixed, by thermal shrink fitting, to a periphery of the rotor shaft inserted in the shaft hole, wherein
- the rotor shaft has a reduced-interference portion at a position that corresponds to an end region of the rotor core in an axis direction of the rotor core, in a contact region of the rotor shaft which contacts an inner peripheral portion of the shaft hole of the rotor core.
Dependencies are inferred from the claim text.