GB1139902A - Improvements in or relating to combine harvesters - Google Patents

Abstract

1,139,902. Combine harvesters. TEXAS INDUSTRIES Inc. 26 Jan., 1966 [3 Feb., 1965], No. 3598/66. Heading A1F. A combine harvester comprises a threshing mechanism, a straw shaking mechanism for the separation of grain from straw, the shaking mechanism including a substantially horizontal supporting member lying rearwardly of the threshing mechanism and provided with openings, an endless conveyer arranged above the supporting member for displacing threshed crop therealong, and driving means for causing the supporting member to perform substantially vertical vibratory oscillations in operation. As illustrated cut crop is delivered directly to a threshing assembly which extends the whole width of the mowing table. The threshed crop is then forced by the lower run of an endless conveyer 132 which includes angle bars mounted on chains, the bars carrying e.g. rubber impregnated canvas strips over a guide 102 and a slotted corrugated supporting member 117. The supporting member may include a single plate or a plurality of slotted plates (Figs. 14-17, not shown). In an alternative embodiment the member 117 is replaced by an apertured endless belt. The guide and supporting member are pivotably mounted at their adjacent ends and are resiliently mounted at their remote ends by springs 110, 124 respectively. The supporting member 117 is oscillatable about its pivot 118 by means of a bell crank lever 154, a lever 150 and an eccentric 149 mounted on a shaft 147. Threshed grain is carried upwardly by an endless belt 188 to a cleaning unit 146. Grain falling through the supporting member 117 passes directly on to the sieves of the unit. The grain is then fed from trough 159 by augers and an elevator to a grain tank 161 which has an endless belt therein for evenly distributing the grain and an unloading auger 168. Other threshed grain or unthreshed crop falls on to gutter 186 which slopes laterally of the combine or into a trough 158 via a guide 217. Crop in the gutter passes via a feeder (185) (Fig. 4, not shown) on to one section 181 (Fig. 19) of an endless conveyer 172 enclosed in a housing 170. The other section 180 of the conveyer receives grain from auger 169 in the trough 158. The conveyer 172 transports the material beneath a viewing opening 187 in the housing 170, to the threshing assembly. The shaft 147 carries rubber blades 148 which sweep straw from the conveyer 132. The mowing table which includes two arms 30, cutter bar 31, base plate 32 and side walls 33 is pivotally connected at 29 to lugs 28 provided on the harvester main frame beam 4 (Fig. 5). The mowing table is moved to a transport position via lever 52 and mechanism 46-51 when the lever is engaged by pin 218. A lever 114 connected to a lever 116 contacts lug 11 of the guide 102 and thus defines the uppermost position of the guide. The position of the drum 80 is also variable through screw threaded member 95 and mechanism 81-91. A spring 92 permits resilient movement of the drum away from the concave. The reel 57 which may include bars of circular section having angle bars carrying tines affixed thereto (Fig. 8, not shown) or bars of square section carrying tines (Fig. 10, not shown) is adjustable through a supporting arm 77, pin 78, and holes 79. The machine parts are driven by an engine via belts and continuously variable change-speed pulleys.