THE HARVESTING AND ASSORTING MACHINE

摘要

Harvester machine used for threshing and assorting of grain etc. The purpose of the invention is to provide a harvester in which the separation and cleaning processes of the grain as well as the translation of the straw have been joined and connected to the devices mounted to revolve about the same axis, standard. This harvester is made up of a vertically revolving threshing drum (2) in the form of a truncated cone which separates the grain and screening unit (8) revolving around the drum at different speed which cleans the grain by means of blower (9). These activities take place concurrently. The harvester also includes a chute conveyor (17) which collects the partly threshed grain with returns in order to be rethreshed. The typical feature of the invention is that the threshing clearance can be easily adjusted by mere lifting and lowering the drum; moreover the angle of inclination of the threshing drum and the grate and screening unit can be different, with a further change of inclination if required, the outermost of the threshing machinery and the size of the screen unit can be chosen as desired by altering the diameters, height and the angle of inclination of the truncated cones. Both the separation and the cleaning process of the grain takes place under gravitational and centrifugal force assisted by means of air-circulating impellers. The grate and screening unit, assorting the grain, has been mounted at the bottom with a large thrust bearing (14) and on top is supporting by the rubber rolls (15) which rotate the unit. To keep the outermost sieve clean the thresher drum housing can be provided if desired with a brush which is either stationary or engaged with gears on both ends.