MOTOR

To provide a motor capable of restraining reduction of magnetic force of a magnet.SOLUTION: A motor includes a rotor having a medial axis J, and a stator facing the rotor in the radial direction. The rotor includes a rotor core 22a having multiple magnetic steel sheets laminated in the axial directi...

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Bibliographic Details
Main Authors TAKENAKA AKIRA, IBUKI HIROTO, FUJIWARA HIDEO, YOSHIDA YUSAKU
Format Patent
LanguageEnglish
Japanese
Published 02.04.2020
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Summary:To provide a motor capable of restraining reduction of magnetic force of a magnet.SOLUTION: A motor includes a rotor having a medial axis J, and a stator facing the rotor in the radial direction. The rotor includes a rotor core 22a having multiple magnetic steel sheets laminated in the axial direction, a magnet placed on a face of the rotor core directing the radial direction, and a resin magnet holder 26 provided on the rotor core and holding the magnet. The rotor core has a first rotor core part 22 placed in a first region in the axial direction. The first rotor core part has a groove 28 recessed in the radial direction from a face of the first rotor core part directing the radial direction, and extends in the axial direction. The multiple magnetic steel sheets has a first magnetic steel sheet 41 having a recess constituting a part of the groove in the axial direction, in a face of the magnetic steel sheet directing the radial direction, and a second magnetic steel sheet 42 having a closing part overlapping and covering the recess when viewing from the axial direction. The second magnetic steel sheet is placed at the end of the first rotor core part in the axial direction.SELECTED DRAWING: Figure 7 【課題】マグネットの磁力の低減を抑制できるモータを提供する。【解決手段】中心軸Jを有するロータと、ロータと径方向に対向するステータと、を備える。ロータは、軸方向に積層する複数の電磁鋼板を有するロータコア22aと、ロータコアの径方向を向く面に配置されるマグネットと、ロータコアに設けられ、マグネットを保持する樹脂製のマグネットホルダ26と、を有する。ロータコアは、軸方向の第1領域に配置される第1ロータコア部22を有する。第1ロータコア部は、第1ロータコア部の径方向を向く面から径方向に窪み、軸方向に延びる溝部28を有する。複数の電磁鋼板は、電磁鋼板の径方向を向く面に、溝部の軸方向の一部を構成する凹部を有する第1電磁鋼板41と、軸方向から見て、凹部と重なり凹部を覆う塞ぎ部を有する第2電磁鋼板42と、を有する。第2電磁鋼板は、第1ロータコア部の軸方向の端部に配置される。【選択図】図7
Bibliography:Application Number: JP20180184822