| 摘要 |
The electric rotating machine includes a stator having an inner hole, a rotor disposed in the inner hole of the stator with a gap with an inner periphery of the stator and formed with magnet housing holes each housing a permanent magnet as a magnetic pole embedded in the outer periphery of the rotor, and a shaft pressure-inserted into a center hole of the rotor. The rotor includes, for each adjacent two of the magnet housing holes, a beam portion formed radially outside the magnet housing holes, a projecting portion projecting radially inward to define the center hole, an extension portion formed radially outside the projecting portion and radially outside the magnet holes, and a plate-shaped bridge portion connecting the beam portion and the extension portion. |
| 主权项 |
1. An electric rotating machine comprising:
a stator having an inner hole; a rotor disposed in the inner hole of the stator with a gap with an inner periphery of the stator, and formed with magnet housing holes each housing a permanent magnet as a magnetic pole embedded in an outer periphery of the rotor; and a shaft pressure-inserted into a center hole of the rotor, wherein the rotor includes, for each adjacent two of the magnet housing holes, a beam portion formed radially outside the magnet housing holes, a projecting portion projecting radially inward to define the center hole, an extension portion formed radially outside the projecting portion and radially inside the magnet holes, a plate-shaped bridge portion connecting the beam portion and the extension portion, and a concave portion formed between adjacent projecting portions, wherein a hollow portion is formed between each of the magnet housing holes and a corresponding one of the projecting portions; and wherein the plate-shaped bridge portion is on an extension of a center line of the projecting portion, and the hollow portion is immediately radially outside the projecting portion. |
