To sufficiently take out grains in a tank without installing an empty space under the grain tank and to avoid or eliminate a bridging phenomenon of the grains in the tank irrespective of the grain tank for a combine harvester designed to take out the grains with a bottom screw while preventing the grains from remaining in the tank.
The grain tank for the combine harvester is obtained by supporting a bottom plate 15 through a pair of rotating supporting shafts 31 with a front wall plate and a rear wall plate 13. Each of the rotating supporting shafts 31 is an eccentric rotor. Power is transmitted from the bottom screw 18 to rotate and drive one of the rotating supporting shafts 31. The power is transmitted from the one of the rotating and supporting shafts 31 to rotate and drive the other rotating supporting shaft 31. The bottom plate 15 is rotated, driven and vibrated in the horizontal or nearly horizontal direction in the far and near direction from the bottom screw 18 while maintaining a grain-carrying surface 15a in the horizontal or nearly horizontal direction. The grain-carrying surface 15a of the bottom plate 15 applies transferring force to threshed grains by friction with the threshed grains on the grain-carrying surface and the threshed grains are fed to the bottom screw 18.
COPYRIGHT: (C)2007,JPO&INPIT
TAKEUCHI YOSHIAKI
TAKAHARA KAZUHIRO
