Air suction type corn precision seed metering device

By setting a seed-disturbing protrusion and a shaped hole in the air-suction corn precision seed metering device, and using double discs for staggered seeding, the seed posture is adjusted, the seed filling area is increased, and the problems of difficult seed filling and high missed seeding rate during high-speed operation are solved, achieving a highly efficient sowing effect.

CN119856622BActive Publication Date: 2025-10-21CHINA AGRI UNIV
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Patent Information

Application Number
CN202510283125.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-11
Publication Date
2025-10-21
Estimated Expiration
2045-03-11

AI Technical Summary

Technical Problem

Existing air-suction precision seeders have difficulty filling seeds and have a high rate of missed seeding when operating at high speeds, which affects the seeding quality.

Method used

A pneumatic precision seed metering device for corn was designed, including a seed metering unit and a seed cleaning structure. A seed disturbance protrusion is set up to cooperate with the shaped hole. The seed metering is carried out by two discs in an alternating manner. The seed disturbance protrusion is used to adjust the seed posture. A seed cleaning area, a seed filling area and a seed placement area are set up inside the shell to increase the filling time and range and reduce the missed seeding rate.

Benefits of technology

It improved the single-seed filling rate, reduced the missed sowing rate and the re-sowing rate, and improved sowing efficiency and quality.

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Abstract

The application discloses a gas suction type corn precision seed metering device in the field of agricultural machinery equipment, which comprises a shell, a seed metering unit is arranged in the shell, the seed metering unit comprises a seed metering disc, a plurality of type holes are uniformly and spaced apart in the circumferential direction of the seed metering disc, and the distance between the center of the type hole and the seed metering disc is a preset value; the shell is respectively provided with a seed filling area, a seed cleaning area, a seed carrying area and a seed dropping area corresponding to the surface position of the seed metering disc, a seed cleaning structure is arranged in the shell, the seed cleaning structure is arranged at the position of the seed cleaning area, the shell is provided with a seed inlet communicated with the position of the seed filling area, and the shell is provided with a seed dropping port communicated with the position of the seed dropping area; a seed disturbing boss is arranged between two adjacent type holes, the distance between two adjacent seed disturbing bosses is a preset value and is adapted to the maximum length of the corn seeds; the single grain filling rate is greatly improved, the seed filling efficiency is improved, and the reseeding rate is reduced.
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Citation Information

Patent Citations

  • Mechanical / pneumatic combined internal-charging type precision corn seed sowing device

    CN102027825A

  • Accurate seed throwing mechanism and accurate seed throwing method of corn planter

    CN104956815A