Pneumatic combined plate type single seed precision seed metering device

Abstract

The invention relates to a pneumatic combined plate type single seed precision seed metering device, which comprises a shell. A seed inlet, an air inlet, and a seeding port are formed on the shell, and a seed cleaning piece and a seed pushing piece are fixed in the shell; a seed plate is arranged in the shell and consists of a plate center, a rubber indent belt, and an outer ring which are sleeved; and holes are formed at the peripheries of the plate center, the rubber indent belt, and the outer ring at interval correspondingly. A circle of strip-shaped groove is formed on the inner side of the circumference of the plate center; the rubber indent belt is provided with a hemispherical indent; a cross slot is formed at the bottom of the indent; and a conical hole is formed on the outer ring so as to be naturally connected with the indent. The seed cleaning piece is close to the seed inlet and can slide in the plate center groove and cannot pass through the cross slot at the bottom of the rubber indent. The seed pushing piece is close to the seeding port and can slide in the plate center groove and pass through the cross slot at the bottom of the rubber indent; a seed brush is tangential to the outer ring of the seed plate; and a brush axle is parallel to a transmission shaft of the seed plate. The seed metering device is also provided with a seed blocking piece and a seed protection rubber piece. The pneumatic combined plate type single seed precision seed metering device effectively guarantees the links of filling seeds, cleaning the seeds, protecting the seeds and discharging the seeds, and realizes precision seeding.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a pneumatic combined disc single-grain precision metering device for precise sowing of corn seeds and the like. Background technique [0002] The precision seed metering device is mainly divided into two categories: mechanical type and pneumatic type. The mechanical precision metering device widely used in China cannot adapt to high-speed operation, and it is difficult to meet the needs of the development of modern agricultural industrialization. Among the pneumatic seed metering devices, the air-suction seed metering device has poor adaptability to the shape of seeds. When sowing non-round seeds such as corn, the rate of missed seeding is high, and the power consumption is large, and the field is prone to missed seeding. Air-blowing seed metering device and pneumatic seed metering device are two kinds of pneumatic seed metering devices that are less used in curre...

AI Technical Summary

Problems solved by technology

The air-blowing seed metering device uses airflow to blow out the excess seeds in the socket of the seeding tray, and only keeps one seed to achieve single seed sowing. The matching requirements of the upper hole are strict, and when the blowing pressure is slightly higher, the phenomenon of seed knocking by the air nozzle is easy to occur; in the pneumatic seed metering device, the seeds are pressed and attached to the socket under the action of their own weight and air pressure difference, and then rotate. To the upper part, the excess seeds fall back by their own weight, and the few seeds remaining on the socket are scraped off by the brush, leaving only one seed to form a single seed sowing, but this kind of seed meter generally can only accommodate one seed in one socket. If there are many seeds in the filling area and the air pressure is weak, it is difficult to ensure the filling effect

Using a brush to clear seeds, the fixed brush is prone to seed knocking, and the brush is severely worn; the rotating brush needs an external drive, and the structure is complex

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