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    • 28. 发明授权
    • Enclosed electric motor with dynamic pressure air bearing
    • 封闭式电动机带动态空气轴承
    • US5650674A
    • 1997-07-22
    • US504329
    • 1995-07-19
    • Kunio Hayashi
    • Kunio Hayashi
    • F16C17/02G02B26/12H02K5/16H02K5/24H02K7/08H02K7/14H02K9/08H02K9/12H02K9/18H02K21/24H02K15/14
    • H02K9/12G02B26/121H02K21/24H02K5/1675H02K9/08
    • An enclosed electric motor includes a stator assembly, a rotor assembly held via a dynamic pressure air bearing on the stator assembly, and a motor casing enclosing the stator and rotor assemblies. An air flow path is formed in the motor casing so as to communicate between an axial upper space and an axial lower space in the motor casing, so that the difference in air pressure between these spaces is reduced. Heat-dissipating fins are formed on the outer periphery of the motor casing so as to correspond to the air flow path. When the motor casing is formed with a plurality of air flow paths, a circumferential interval of the air flow paths is set at 150 degrees. A circumferential interval of two concavities formed in the inner periphery of the motor casing is also set at 150 degrees. Either one of the concavities serves as a window through which laser beams pass when the motor is used as a scanner motor for driving a polygon mirror which is employed for scanning laser beams in a laser printer.
    • 封闭式电动机包括定子组件,通过定子组件上的动压空气轴承保持的转子组件和封闭定子和转子组件的电动机壳体。 在电动机壳体中形成气流路径,以便在马达壳体中的轴向上部空间和轴向下部空间之间连通,从而减小了这些空间之间的空气压力差。 散热翅片形成在马达壳体的外周上,以对应于空气流动路径。 当马达壳体形成有多个空气流路时,空气流路的周向间隔被设定为150度。 形成在马达壳体的内周中的两个凹部的周向间隔也被设定为150度。 当马达用作用于驱动在激光打印机中扫描激光束的多面镜的扫描仪电机时,两个凹部中的任一个用作激光束通过的窗口。