SOWING APPARATUS WITH PNEUMATIC ACTUATOR Russian patent published in 2017 - IPC A01C7/04 

FIELD: agriculture.

SUBSTANCE: sowing apparatus contains a perforation disc 6, a pulse former 4, a photodetector 5, a seed hopper 22, seed tubes 24, 25, a compressed air source 1, a pneumatic distributor 3, a pressure head 2, actuating 10, 11 and ejecting 26, 27 pneumatic mains, a plunger 20 entering the housing 21. The apparatus additionally contains the second hopper 23, a seed tube and two pneumatic chambers. The diaphragms 14, 15 of the pneumatic chambers 12, 13 act through the rods 16, 17 and the arms 18, 19 on the plunger 20, which in turn has two transverse channels in the form of through openings. The axes of the openings are located at a distance equal to the difference between the distance between the axes of the outlet openings of the hoppers 22 and 23 and the reciprocating motion amplitude value of the plunger 20. The axes of the seed tubes 24 and 25 in the housing 21 are located at the distance equal to the difference in the distance between the axes of the outlet openings of the hoppers 22 and 23 and the double value of the reciprocating motion amplitude of the plunger 20. When the direction of the air flows in the pneumatic mains changes, the diaphragms 14, 15 and the rods 16, 17 of the pneumatic chambers 12 and 13 alternately move, acting via the arms 18, 19 on the plunger 20, which causes its reciprocating motion.

EFFECT: increasing the productivity while keeping stable seeding accuracy.

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