The invention discloses an automatic grading
machine for removing impurities in grain seeds. The automatic grading
machine comprises a
machine body, a rotary body, a rotary body shaft, an opened sleeve, a screen, a
maple leaf wheel, a shaft wheel, a rectangular belt, an
electric motor, a motor wheel, a grading box, a funnel, a door, an
impurity barrel, a rotary wheel, a
threaded rod, a puling
handle, a shell, a small shaft, walking wheels, a universal rack and the like; the rotary body is provided with a shaft hole, and the part, which penetrates through the shaft hole, of the rotary body shaft is provided with the
maple leaf wheel and the shaft wheel; the rotary shaft penetrates through a corresponding shaft hole formed in the machine body to be assembled; the automatic grading machine isapplicable to one-step screening,
impurity removing and grading of wheat, rice, beans, corns, broomcorn, mung beans, peanuts, rapeseeds and other particle seeds,
dried fruits and grains; cleanness isgood; long-term storage is facilitated; molding and deterioration do not happen easily; and the automatic grading machine is an indispensable ideal device for
agriculture, and is safe, reliable, lowin cost, long in service life, convenient, rapid, low in
power consumption, low in
noise, labor-saving, large in market, durable, stable in performance and accordant with mechanical principle.