Dosing device and distribution for grain seeder.

摘要

Dosing device and grain distribution to drill, comprising a housing (1) having an inlet (11) of the grains arranged in the base of a hopper and an outlet opening (12) of the grains with a dosage determined, being the housing (1) internally provided with moving assembly in axial translation along a horizontal axis XX¿, said assembly comprising a cylindrical drum (2) and immobilized in rotation by a shaft rotating distribution corrugated (3) being coupled coaxially with the drum (2), allowing adjustment means (50, 51) move the assembly axially so as to make project more or less the end of the fluted shaft (3) out of the box in order to vary the useful volume the grooves (30) that ensure the transfer of beads inlet opening (11) to the outlet opening (12) through the fluted shaft (3) with little play a ring (4) Cua l is integral in rotation and which is guided in rotation but fixed in translation in a wall element (10) of the box, being the metering chamber of defined grain transversely, ie perpendicularly to the grooves (30), by one side by the front face (20) of the drum which is adjacent the splined shaft and, on the other hand, by the front face (6) of the ring which faces the interior of the box, characterized in that said front faces (20) the drum (2) and (6) of the ring (4) have an essentially frustoconical shape and / or form part of a substantially frustoconical surface whose apexes are directed towards the same side.