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

Abstract

The invention relates to a mechanical / pneumatic combined internal-charging type precision corn seed sowing device which is characterized by comprising a flat-plate-shaped seed sowing device underpan, a concave disk-shaped structure seed sowing tray, a semicircular-like isolation plate fixed on the underpan, a transmission shaft, an air inlet hole, a seed sowing port and a seed inlet port, whereinthe outer edge on the inner side of the seed sowing tray is provided with a circle of bosses in the circumferential direction, the bosses rotatablely abut against the underpan, a cavity is formed between the concave part of the seed sowing tray and the underpan; the bosses are provided with a plurality of hemipyramid grooves at intervals along the circumferential direction, each groove has a bigger upper opening and a smaller lower opening, and the grooves abut against the underpan to form a plurality of pockets; the outer edge of the isolation plate is arranged on the inner edge of the boss;one end of the transmission shaft is fixedly connected with the seed sowing tray, and the other end of the transmission shaft is connected with a power system after penetrating through the isolation plate and the underpan; the air inlet hole is arranged on the underpan at the start end of the isolation plate and partially penetrates through the start end of the isolation plate; the air inlet holeis connected with an air inlet pipe; the seed sowing port is arranged on the underpan below the tail end of the isolation plate; and the seed inlet port is arranged on the underpan which is adjacent to the seed sowing port and far away from the isolation plate and connected with a seed inlet pipe.

Description

technical field [0001] The invention relates to a seed metering device, in particular to a mechanical-pneumatic combination inner-filling type corn precision seed metering device. Background technique [0002] The internal seed metering device has simple structure and convenient transmission, and can adapt to high-speed operation in terms of seed filling. Most of the existing inner-filling seed metering devices are mechanical, such as the two inner-filling seed metering devices with patent numbers 02294813.9 and 93240136.8. Seed. However, this type of seed metering device has the disadvantages of excessive seed quantity, complex seed cleaning and metering device, easy to cause mechanical damage to seeds, and the amount of seed held in each socket cannot be accurately controlled, making it difficult to achieve Precision sowing of ungraded seeds. The internal filling seed metering device with the application number 91108988.8 has made some improvements in seed filling, but ...

AI Technical Summary

Problems solved by technology

However, this type of seed metering device has the disadvantages of excessive seed quantity, complex seed cleaning and metering device, easy to cause mechanical damage to seeds, and the amount of seed held in each socket cannot be accurately controlled, making it difficult to achieve Precision Sowing of Ungraded Seeds

The internal filling seed metering device with the application number 91108988.8 has made some improvements in seed filling, but the distance between the seed injection hole and the seed discharge port is too close to implement effective seed clearing measures, and the possibility of reseeding and missing seeding is relatively high. Difficult to complete precision seeding under high-speed operation

Some existing air-suction inner-filling seed metering devices require good sealing in the entire cavity, high processing accuracy requirements, complex structure, large power consumption, and high cost

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