Air-suction type seeder for small and medium-sized seeds

Abstract

The invention discloses an air-suction type seeder for small and medium-sized seeds, and belongs to the technical field of agricultural machinery. The air-suction type seeder for small and medium-sized seeds comprises a seed box, a seed metering disc, a negative pressure air chamber outer shell and a seed metering tube, wherein the negative pressure air chamber outer shell is fixedly mounted on amachine frame of the seeder; an air chamber is formed in the negative pressure air chamber outer shell; a negative pressure air passage is formed in the top of the negative pressure air chamber outershell; the seed metering disc capable of rotating relatively is arranged at the bottom of the negative pressure air chamber outer shell; the seed metering disc is driven to rotate by a motor; seed suction air passages are uniformly formed in the seed metering disc in an annular array; seed suction air nozzles are mounted at the bottom ends of the seed suction air passages; the seed box and the seed metering tube are respectively and fixedly mounted on two sides of the seed metering disc; a seed filling slideway is formed in an outlet at the bottom of the seed box; and an air flow blocking piece is mounted on the side wall of the air chamber. The seeder utilizes a negative pressure seed suction mode to carry out seed delivery, the delivery is stable and efficient, and the phenomena of seeddamage and missed sowing and resowing are effectively reduced, and thus the seed metering efficiency of the seeder is guaranteed.

Description

Technical field [0001] The invention relates to the field of agricultural machinery, in particular to an air suction planter for small and medium grain seeds. Background technique [0002] With the rapid development of domestic agricultural machinery seeding technology, the requirements for precision seeding are getting higher and higher. According to the requirements of modern agricultural technology, the seeder should be as versatile as possible, that is, it can meet the seeding needs of multiple seeds at the same time. Small agricultural machinery can be better promoted to farmers to reduce labor intensity and improve planting efficiency, and should have an automatic detection function to reduce the missed rate of planters and reduce farmers' losses. [0003] At present, conventional air-suction seeders have a long airway distance and generally use fast airflow. When the airflow passes through the airway quickly, the shaft airway will have serious loss along the way. If multiple...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the long airway distance of conventional air suction seeders, and the air suction generally adopts fast airflow, when the airflow passes through the airway quickly, the shaft airway will have serious loss along the way. If multiple seeding wheels are simultaneously The seeding wheel at the end of the airway has poor seed suction effect; for a single seeding wheel, due to the large diameter of the airway of the rotating shaft, the design diameter of the seeding wheel is large, and each airway connected to the hole Due to the long distance from the air passage of the rotating shaft, the adsorption effect on the seeds is not ideal. To avoid the above problems, a high-power air pump is required, which will excessively increase the manufacturing cost and cannot be used in normal agricultural work.

At the same time, due to the different sizes of the seeds, smaller seeds may be stuck in the air passage connected to the suction hole, causing the seed wheel to be blocked and affecting the seed metering efficiency of the seed meter.

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