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Variable speed drive for machine tool - using dual motors and differential epicyclic gear with satellite wheels running on tool shaft and driven by induction motors
Variable speed drive for machine tool - using dual motors and differential epicyclic gear with satellite wheels running on tool shaft and driven by induction motors
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机译：机床的变速驱动器-使用双电机和差速器行星齿轮，带有在工具轴上运行并由感应电机驱动的卫星轮
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摘要
The variable speed drive for a machine tool, such as a drill (14), uses an epicyclic gear train functioning as a differential with its satellite wheels driven by separate three phase induction motors. The induction motors are of the pole changing type, one 4/8 poles and the other 2/8 poles, and the drill speed is altered by altering the relative speed of the two induction motors. Two arms (12) are fixed perpendicular to the drill shaft, and each carries a conical planet wheel (10,11). Conical satellite wheels (8,9) run on the drill shaft (13), one above the planet wheel arms and one below. Each satellite wheel has a second spur gear cut on it, and this gear meshes with the pinions (4,5) on the shaft of the two induction motors (2,3).
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