| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor having a cooling structure formed by a simple and inexpensive method.SOLUTION: In the motor including a rotating shaft, a rotor fitted to the rotating shaft so as to surround the rotating shaft, and a stator provided around the rotor, the cooling structure to cool at least one of the rotor and the stator is provided. A first hole extending along a rotation axis is formed in a boundary portion between the rotating shaft and the rotor. A second hole is also formed extending in a radial direction while communicating with the first hole at one end part and opening to the ambient space of the rotating shaft and the rotor or the external space of the motor at the other end part. A cooling fluid flows in a passage formed by the first hole and the second hole. A third hole extending along the rotation axis may be formed between the second hole and the ambient space or the external space. |
