Precision seed metering device of seeds with middle and large grain diameters

Abstract

The invention discloses a precision seed metering device of seeds with middle and large grain diameters. Seed taking principles of pneumatic seed metering devices and mechanical seed metering devicesare combined, and a seed carrying component and a seed metering component are designed, wherein negative pressure and indent holes are combined to conduct seed taking. The precision seed metering device includes a seed metering device shell, a seed removing device, a seed storage device and a shaft; the seed metering device shell includes an end cover, a cover plate, a belt and an external fixingplate; the shaft is mounted on the external fixing plate; the seed removing device is located at the inner side of the end cover of the seed metering device, and the seed storage device is composed ofa seed metering disc, an indent hole sliding block mechanism and a cam-like mechanism. The precision seed metering device can adapt to the appearance requirements of the seeds; in a seed taking stage, the seeds enter the indent holes through negative pressure and self-gravity, then, superfluous seeds are brushed back to a seed chamber through the seed removing device and enter a seed carrying area, the seeds are still subjected to an adsorption effect, indent hole sliding blocks are closed so that the seeds can be more stable in a seed carrying process, a dual seed protection effect is achieved, and finally, the seeds pass through a secondary seed putting area to be put into seed holes. Overall, by adopting the precision seed metering device, power consumption can be reduced, the seed carrying rate is increased, the seed damage rate is reduced, and the sowing qualification rate of the precision seed metering device is increased.

Description

Technical field [0001] The invention relates to a seed metering device, in particular to a precision seed metering device for medium and large-diameter seeds, belonging to the field of agricultural mechanization engineering. Background technique [0002] There are two main types of seed metering devices: mechanical and pneumatic. Regarding the mechanical seed metering device that can be used for medium and large-size seeds, the degree of precision seeding is not high. With the development of large-scale and high-speed seeder, the disadvantage of mechanical seeding device is becoming more and more obvious. The suction type seed metering device in the pneumatic seed metering device is suitable for high-speed operation due to its low damage rate to seeds, strong adaptability and high seeding efficiency, but its seeding process is closely related to negative pressure. Provided by the fan, and the seeding effect has a lot to do with the working conditions. For medium and large-sized...

AI Technical Summary

Problems solved by technology

For medium and large-sized seeds, using a fan with a higher power for sowing will increase the cost of sowing; but using a fan with a lower power usually cannot meet the sowing effect, and the adsorption performance of the seeds when the negative pressure is unstable reduce

Secondly, the mechanical seed metering device is easy to damage the seeds during operation, which can reduce the qualified rate of the seeds; for the pneumatic seed metering device, when the seed particle size is irregular, the negative pressure loss is large, and the operating performance of the seed metering device is reduced

[0003] At present, the domestic air-suction seed metering device is mainly used for small and medium-sized seeds, such as cotton, corn, soybean seeds, etc., but the air-suction seed metering device is not suitable for large and irregularly shaped seeds (such as peanut seeds)

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