| 摘要 |
<p>A gantry robot construction is provided. The construction includes a pair of elongated substantially spaced parallel rails (112, 114), a bridge (120) spanning and substantially perpendicular to the rails and movable relative to the rails, and a robot head (134) and support mounted on the bridge and movable relative to the bridge. The rails are positioned along the width or shorter side of the work area (90) with the bridge spanning the length or longer side of the work area. An improved rack (150, 152) and pinion (200) apparatus is also disclosed that is used in association with the gantry robot construction. There is a zero degree pressure angle between the rack and pinion. In the pinion the base circle is congruent with the pitch circle (205).</p> |
