| 摘要 |
<p>A crop threshing, separating and cleaning mechanism comprising a threshing rotor (1) and open grate concave (4) that co-operate to thresh crop material therebetween, a grain separating mechanism (5) that receives threshed crop material that passes through between the threshing rotor and concave grate, a conveyor mechanism (9, 7) that collects grain falling through the concave grate (4), a grain cleaning mechanism (18) to which the conveyor (9) delivers said grain independently of said threshed crop material, and a grain pre-cleaning mechanism (10) that directs a blast of air through falling grain as it passes via said conveyor mechanism (9, 7) to the cleaning device (8). The conveyor mechanism preferably comprises a continuous band-type conveyor (9) that elevates grain before dropping it to a second conveyor (7), a pre-cleaning fan (10) being located below the conveyor (9) to blow air through the grain as it falls onto the second conveyor (7). Air from the pre-cleaning fan (10) is preferably also directed to pre-clean grain in the grain separating mechanism (5) and/or as it falls in passing to the grain cleaning mechanism (8). </p> |
