The invention discloses a small positive and negative pressure double-acting pneumatic-type vegetable precision
seeder. The
seeder comprises a rack, a seeding unit, a
plant spacing adjustment gearbox,front and rear press wheels, walking wheels at the two sides, a fan and a power
system; the front and rear press wheels are arranged at the two ends of the rack in the forward and backward direction,the power
system is arranged on the rack, the fan is connected with the power
system and connected with the seeding unit through an air
pipe, the seeding unit is movably connected to the rack, and the gearbox is rotatably connected with the front press wheel and arranged on the rack; positive and negative pressure is generated by supplying
kinetic energy to the fan through the power system, an
airway disc achieves the separation of the positive and negative pressure, vegetable seeds are prevented from being attached into a seed discharging disc of the seeding unit, the seeding unit is movablyconnected to the rack, row spacing adjustment is achieved, the problem of low seeding precision of vegetable seeds with irregular seed shapes and
low mass is solved, the vegetable seeding precision and efficiency are improved, and the
seeder is clear in principle and has use prospects.