| 摘要 |
An auxiliary drive unit which consists of a cylindrical housing which has an extension arm attached thereto for the support of an idler shaft; the cylindrical housing is mounted in a bore of a wall of the gear box of the automatic screw machine and the extension arm is disposed within the housing; a shaft extends through the housing and into the gear box and has a gear mounted adjacent the extension arm to mesh with a gear on the idler shaft which is supported in the extension arm of the housing; a further gear is mounted on the idler shaft within the gear box housing which is adapted to mesh with a gear supported and driven by the main spindle drive shaft of the automatic screw machine. The gears on both the housing shaft and idler shaft can be easily interchanged to obtain different auxiliary drive arrangements and drive ratios for different purposes. Conversely, the driving connection from the idler shaft of the auxiliary drive unit to the housing shaft of the drive unit can be provided for by a chain drive.
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