| 摘要 |
A tool support adjusts the level of, for example, a tool mounted behind the work surface of a plate so as to vary how far the tool working implement extends through and beyond the work surface. The tool support includes a plurality of threaded rods fixed at one end to the plate, a carriage mounted to the threaded rods and holding the tool, a drive rod and a gear train. Rotation of the drive rod effects, through the gear train, translation of the carriage along the threaded rods, thus advancing or withdrawing the tool working implement through an aperture in the plate. A distance gauge informs an operator how far beyond the work surface the working implement protrudes or how far the carriage has traveled. Other embodiments include a drive motor, various gear train configurations involving posts and gear racks, and translating the carriage within a cylinder.
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