| 摘要 |
<p>An adjustable multiple row head assembly 10 for a crop harvester provides cantilevered support arms 56, 58, 60 for a plurality of row head units 12, 14, 16. The units are adjustably positioned for harvesting crops planted in differently spaced rows. An adjusting device 64 for the row head units provides infinitely variable adjustment, and specifically includes a jackscrew 70 operating between a moveable frame member 44, 48 of the row head unit and the fixed cantilevered support arm 56 therefor. The row head units extend in a fore-and-aft direction with respect to a base 18 and include gathering conveyors 24, 26 driven by sprockets 34, 36, 40. The conveyors cooperatively form passageways 28 having inlets 13, 15, 17 for the crop, and engage idler sprockets 38 adjustable in accordance with the row head unit adjustment to maintain proper tension in the conveyors. The adjustable row head units pivot about an axis 46 forwardly of the driving sprockets for the conveyors thereof, thus discharging the crop at substantially the same point, direction and orientation with respect to the cutting or chopping inlet of the harvester.</p> |
