Clean grain and tailings conveying system for an agricultural combine

1. A clean grain and tailings conveying system for an agricultural combine, comprising:

a pan adapted to be fixedly mounted to a combine beneath a lowermost sieve of a cleaning system of the combine, including a tailings receiving portion disposed below a peripheral edge portion of the sieve for receiving tailings which fall downwardly from the edge portion during operation of the sieve, and a clean grain receiving portion disposed beneath the sieve for receiving clean grain which falls downwardly therethrough during the operation of the sieve, the pan including at least one elongate collecting trough including a clean grain collecting portion which extends longitudinally through the clean grain receiving portion of the pan, and a tailings collecting portion which extends longitudinally through the tailings receiving portion, for separately receiving and collecting the clean grain and the tailings received by the pan;

a clean grain transfer conveyor in connection with the clean grain collecting portion of the collecting trough;

a tailings transfer conveyor in connection with the tailings collecting portion of the collecting trough; and

an elongate helical auger supported in and extending longitudinally through the collecting trough, the auger being rotatable in a predetermined rotational direction about a longitudinally extending rotational axis for simultaneously and separately conveying clean grain contained in the clean grain collecting portion of the collecting trough to the clean grain transfer conveyor, and tailings contained in the tailings collecting portion of the collecting trough to the tailings transfer conveyor.

2. The clean grain and tailings conveying system of claim 1 , comprising a plurality of the collecting troughs extending in side by side relation across the pan.

3. The clean grain and tailings conveying system of claim 2 , wherein the clean grain transfer conveyor and the tailings transfer conveyor are disposed below and extend across the plurality of the collecting troughs at spaced locations therealong.

4. The clean grain and tailings conveying system of claim 1 , wherein the pan is inclined upwardly toward a location spaced beneath the peripheral edge portion of the sieve.

5. The clean grain and tailings conveying system of claim 1 , wherein the auger includes a helical flight extending therearound in a first rotational direction and disposed in the clean grain collecting portion of the collecting trough, and a helical flight extending therearound in a second rotational direction and disposed in the tailings collecting portion of the collecting trough, such that when the auger is rotated, clean grain and tailings collected in the collecting trough will be conveyed in opposite directions toward the clean grain transfer conveyor and the tailings transfer conveyor, respectively.

6. The clean grain and tailings conveying system of claim 5 , wherein the auger includes a helical flight extending therearound in the second rotational direction and disposed in the clean grain collecting portion of the collecting trough, such that when the auger is rotated, clean grain collected in the collecting trough will be conveyed in opposite directions toward the clean grain transfer conveyor.

7. The clean grain and tailings conveying system of claim 1 , further comprising a shield over the tailings receiving portion of the pan adjacent to the peripheral edge portion of the sieve.