Seed-metering device

Abstract

The invention relates to a seed-metering device of a seeder, belonging to the technical field of agricultural machinery. The seed-metering device comprises a shell with a rotary shaft, wherein large and small seed seed-metering wheels are installed on the rotary shaft in parallel, the large and small seed seed-metering wheels are respectively fixed on the rotary shaft in a sleeved mode, the shell is hinged with one end of an elastic seed protective tongue below the large and small seed seed-metering wheels, the other end of the elastic seed protective tongue leans against the lower ends of the large and small seed seed-metering wheels, an eccentric pin hole for accommodating a sliding pin is formed on the end face of the large seed seed-metering wheel, a through hole and a dialing block are arranged on the end face of the small seed seed-metering wheel, and the through hole and the dialing block as well as the eccentric pin hole are located in a same rotary radius. The seed-metering device provided by the invention not only can be used for seeding great grains such as paddy and wheat, but also can be used for seeding small grains such as oilseed rape and sesame. The seed-metering device has the advantages of convenience in operation and high seeding precision.

Description

technical field [0001] The invention relates to a seeder used in agricultural production, in particular to a seeder for the seeder, and belongs to the technical field of agricultural machinery. Background technique [0002] At present, the seeders used in the drill planting of rice, wheat, rape and other crops in agricultural production usually use the seed metering wheel type seed metering device, and the seed metering wheel can be divided into groove wheel type, socket type and special-shaped socket hole type This type of seed wheel is generally not suitable for sowing seeds with a large difference in grain size. For example, a seed meter suitable for large seeds cannot be used for sowing small seeds, and vice versa. The "Seed Meter" invention patent with the publication number CN10042036C discloses a kind of seed meter that can be applied to seeds of different shapes and sizes. Different seeding wheels need to be replaced, and it is troublesome to disassemble and assembl...

AI Technical Summary

Problems solved by technology

[0002] At present, the seeders used in the drill planting of rice, wheat, rape and other crops in agricultural production usually use the seed metering wheel type seed metering device, and the seed metering wheel can be divided into groove wheel type, socket type and special-shaped socket hole type This type of seed wheel is usually not suitable for sowing seeds with large size differences at the same time. For example, a seed meter suitable for large seeds cannot be used for small seeds, and vice versa

The "Seed Meter" invention patent with the publication number CN10042036C discloses a kind of seed meter that can be applied to seeds of different shapes and sizes. Different seeding wheels need to be replaced, and it is troublesome to disassemble and assemble; the second is that only the matching seeding wheels have been replaced for seeds with different grain sizes, so in the seed protection section of the seed metering device, the seeding wheel and the housing The seed protection gap space formed by the wall cannot achieve effective seed protection control for seeds of different sizes, so that the seeding accuracy cannot be ensured

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