Patent GB-1470326-A (GB)
Title: Harvesters
IPC: A01D41/00
Filed: 1974-04-03
Abstract: 1470326 Combine harvesters H SCHMITT 3 April 1974 [5 April 1973] 14724/74 Heading A1F A combine harvester to be mounted on the front of a self-propelled power unit or tractor comprises a crop gathering table having cutter bar 1, feeding auger 2 constituting a feed-in conveyor moving crop to one side of the table, a threshing cylinder 5 and concave 6, and straw walkers 8 constituting a feed-out conveyor arranged above auger 2 and moving crop in the opposite direction to that of auger 2.  The embodiment of Figs. 1 (not shown). 3, 5 and 11 (not shown) has a band reel comprising endless belts or chains 10 on which cross bars 11 carrying tines 12 are mounted. The tines always project downwards for which purpose the cross bars are equipped with an attitude control linkage driven by endless belts or chains 13. The angle of the complete band reel with respect to the ground is adjustable by means of a hydraulic jack (16). The position of the rear shaft 17 relative to auger 2 can be changed since as the reel continues to be pivoted upwards a buffer (33) mounted on each carrying arm 20 engages arms 18. Grain falls from the concave 6 onto auger 7 against an air blast and grain separated by straw walker 8 falls onto pan 9 and from there to auger 7 where it is carried to a grain cleaning device 27, 28. In the embodiment of Figs. 13 14 (not shown) crop is transported to the threshing mechanisms (51, 52) positioned one each side of the harvester by means of a feeding auger (50) constituting the feed-in conveyer and having two flights of opposite hand. Straw is discharged onto auger (54) which also effects grain separation, the grain falling through perforations in trough (58), and conveys the remaining crop to one side of the harvester where paddles (55) throw it onto straw walkers (8) positioned above auger (50). The cutter bar (1) and trough (61). of auger (50) are carried by two gauge wheels (60); hinge (62) allows these parts to float over ground contours under the action of the gauge wheels and also permits the gathering, cutting and feeding parts of the harvester to be detached from the power source. In the embodiment of Fig. 15 (not shown) a conventional reel is used and the cutter bar is mounted on a forward extension of trough (61) cut crop being conveyed over this extension by drum conveyor (65). In the embodiment of Fig. 16 (not shown) a conventional reel is again used but the feeding auger (2) lies directly behind cutter bar (1) crop being fed to the threshing mechanism by chain elevator (66). The embodiment of Fig. 17 (not shown) shows a harvester with a beater (67) behind cutter bar (1) feeding crop directly to the threshing mechanism (68, 71). Conveyor belt (70) carries grain from auger (54) and concave (71) towards one side of the harvester. In the embodiment of Figs. 2 (not shown) 4 and 6 crop is cut by cutter bar 1 and delivered by augers 74, 76 whose flights overlap and which constitute feed-in conveyors to a threshing mechanism 75, 78. Cut crop is carried past the threshing cylinder by an extension of auger 74 having a flight of opposite hand to the remainder of auger 74. Beater (91) feeds crop into threshing cylinder 75 which rotates about an axis extending in the direction of motion of the harvester. Grain separated by the concave 78 drops to an auger (79) and is conveyed to a cleaning device. Threshed straw is thrown by cylinder 75 into a rotary straw walker 77 supported and driven by rollers 80 above conveying augers 74, 76 and constituting a feed-out conveyor. Grain falls into the cylindrical casing 81 within which walker 77 is mounted and paddles 82 convey it rearwards into an auger 83 which delivers it to the auger (79). One form of grain cleaning device used in any of the above embodiments and shown in Figs. 7 and 8 (not shown) comprises an upper rotary cylindrical sieve 27 inside which auger 28 is fed from auger 7. Grain falls through the sieve 27 onto auger 29 while larger crop particles are deflected by plate 30 into a second sieve 31. Here the operation is similar to that described above with larger grain particles deflected by a plate (32) into the third sieve 34 having larger openings which allow unthreshed ears to pass through to be deflected by a plate (35) to auger (2) while waste material is discharged from the machine by an auger within sieve 34. The grain falls to auger 29 through an air current and is discharged into a grain tank (not shown) by elevator 40. The embodiment of grain cleaning device of Fig. 9 (not shown) involves grain falling against an air current which carries away light particles. In the embodiment of Fig. 10 the grain chaff mixture is conveyed by auger (7) to elevator (42) and auger (43) from which it falls against an airflow to auger (44) and then to sieve elevator (46) consisting of conveying boxes (47) covered by adjustable sieves (48). The inclination of the bottoms of boxes (47) causes the grain to fall to elevator (49) which conveys it to a grain tank (not shown). As shown in Fig. 12 (not shown) air pressure generated by fan 27 39 is automatically regulated by the quantity of chaff underneath concave (6).