Product dosing system for agricultural machines

Product dosing system for agricultural machines, being of special utility for the type of fertilizing machines which have, at least:

• a hopper for placing the fertilizer mixture to be spread;
• dosing means for the fertilizer to be poured, and;
• rolling means, associated to the machine itself, for the transmission of movement to the regulating endless axle,
• characterized in that the dosing system comprises:
• at least one deposit body (2) into which three hoppers (3, 3′ and 3″) are defined to place each granulated simple fertilizer (29), independently from one another;
• rolling means (4) associated to the agricultural machine (1) itself that transmit the rotary movement to plates (13) to which respective connecting rods (17) are linked;
• a regulating endless axle (8) associated to each one of the simple fertilizer (29) hoppers (3, 3′ and 3″), to which the displacement of the corresponding connecting rod (17) transmits rotary movement associated to the respective plate (13) to which movement is transmitted from the rolling means (4);
• guiding means for the connecting rods (17), associated to the corresponding regulating endless axle (8), arranged with respect to a slanted hole (27) of the connecting rod (17);
• dosing means associated to each one of the hoppers (3, 3′ and 3″) and defined by a first axle (9) with groups of dosing discs lodged in corresponding rooms (12) to which the simple fertilizer (29) is poured, regulated by the corresponding regulating endless axle (8), the dosing discs (10) being provided in their periphery with a plurality of notches or cuts (11) and to whose first axle (9) movement is transmitted from the respective plate (13);
• a circular crown body (18) with an internal perforation joined to the respective plate (13), in eccentric position;
• a disc body (19) in relation to the circular crown body (18), also in eccentric position to the respective plate (13);
• a pinion (20), associated to the corresponding connecting rod (17), which engages with the internal perforation of the circular crown body (18) joined to the plate (13) and whose pinion (20) is joined to the eccentric disc body (19);
• a pair of racks (21 and 22) joined to the corresponding connecting rod (17), one on each side, into which a third and fourth gearwheels (23 and 24) respectively engage and whose third and fourth gearwheels (23 and 24) alternatively block each other over the regulating endless axle (8) in the displacement of the connecting rod (17) in one direction and the other, and;
• regulating and blocking means for the pinion (20), associated to the corresponding connecting rod (17).