MOTOR AND FAN DEVICE

To provide a motor in which liquid drops having entered a space around a shaft can be discharged with a simple structure.SOLUTION: A motor includes a motor bracket, a shaft, a rotor yoke, a bearing, and a stator around which a coil that generates a magnetic field for rotating the rotor yoke is wound...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NAGAMOTO SATOJI, HORIUCHI SHINYA, WATANABE SHINGO, UEHARA HIROSHI, HOSOI KEIICHI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a motor in which liquid drops having entered a space around a shaft can be discharged with a simple structure.SOLUTION: A motor includes a motor bracket, a shaft, a rotor yoke, a bearing, and a stator around which a coil that generates a magnetic field for rotating the rotor yoke is wound. The rotor yoke has a cylindrical outer circumferential wall that is disposed radially outside the stator and that has an inner circumferential surface supporting a plurality of permanent magnets, a cylindrical inner circumferential wall that is disposed radially inside the stator and that is supported by the bearing in a rotatable manner with respect to the shaft, and a disk-shaped connection wall for connecting, at the other end side in the axial direction of the shaft, an end of the outer circumferential wall and an end of the inner circumferential wall. An axial direction groove that extends in the axial direction and is open to the other end side of the shaft is formed in the outer circumferential surface of the bearing and/or the inner circumferential surface of the inner circumferential wall.SELECTED DRAWING: Figure 5 【課題】シャフトの周りの空間に浸入した液滴を、シンプルな構成で排水可能なモータを提供する。【解決手段】モータは、モータブラケットと、シャフトと、ロータヨークと、ベアリングと、ロータヨークを回転させるための磁界を発生するコイルが巻装されたステータとを備える。ロータヨークは、ステータより径方向の外側に配置されて、複数の永久磁石を内周面で支持する円筒形状の外周壁と、ステータより径方向の内側に配置されて、ベアリングによってシャフトに対して回転自在に支持された円筒形状の内周壁と、シャフトの軸方向の他端側において、外周壁及び内周壁の端部同士を連結する円盤形状の連結壁とを有する。ベアリングの外周面及び内周壁の内周面の少なくとも一方には、軸方向に延設され且つシャフトの他端側に開放された軸方向溝が形成されている。【選択図】図5