Small particle size seed air-suction hole-wheel type precision hole sowing seed metering device

Abstract

The invention belongs to the technical field of agricultural machinery, and provides a small particle size seed air-suction hole-wheel type precision hole sowing seed metering device which comprises abox body (1). A seed throwing funnel (4) is arranged at the bottom of the box body (1), the box body (1) is internally provided with a seed metering wheel (2), the seed metering wheel (2) is internally provided with a negative pressure zone (24) communicating with the seed metering wheel (2), the negative pressure zone (24) is internally provided with a seed pushing wheel (5), and the seed pushing wheel (5) is in meshing transmission with the seed metering wheel (2). Gravity and air suction are combined, so that the seed filling capacity, seed filling efficiency and reliability of seed filling of the seed metering wheel are improved; meanwhile, the seed metering wheel can adapt to the requirements of high-speed seed metering by adjusting the magnitude of negative pressure, and the workingefficiency of the seed metering device is improved; and meanwhile, the seed damage rate can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, and relates to a small-diameter seed sowing and metering device, in particular to an air-suction type hole-wheel type precision hole sowing seed metering device for small-particle diameter seeds. Background technique [0002] my country is a big country for planting small-sized seed crops. The small-sized seeds refer to seeds with an average particle size of less than 3 mm, mainly including rapeseed, millet, and some vegetables and flower seeds. At present, the sowing methods of small-sized seeds are still mainly manual or semi-mechanized, which has problems such as low operation efficiency, high operation cost, large amount of seeds used, uneven distribution of seeds, etc., and the labor intensity of seedlings or seedling replacement is high. Comprehensive The low economic benefit limits the expansion of the sowing scale of small-size crop seeds. [0003] Most of the existing sma...

AI Technical Summary

Problems solved by technology

The pneumatic seed metering device sucks seeds through negative pressure, or negative pressure sucks seeds and positive pressure seeds, which is greatly affected by air pressure fluctuations. When operating at high speed, the performance of the seed metering device is unstable, prone to missed seeding, and the hole is small and easy to Seedlings are blocked, resulting in missed sowing and broken seedlings; mechanical seed metering devices are prone to seed damage. The seeder is difficult to adapt to high-speed seeding operations

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