| 摘要 |
<p>A machine for harvesting grains or seeds comprises a cutting head mounted on a self-powered vehicle, the cutting head containing both cutting means for cutting crop material including the seeds or grain, and threshing means for separating seeds or grains from the cut crop material, the head being mounted on the vehicle so as to be movable vertically to control the height from the ground at which the crop is cut. In a further aspect, a sensing mechanism (figure 3) is disclosed for sensing the height of the crop. The sensor may be a paddle (31, figure 3) mounted on a lever (30, figure 3) or of an optical type. The cutting head may be supported by a caster (40, figure 4).</p> |
