Combined internal hole precise seed dropping device

Abstract

A precise seed dropping mechanism with combined seed pits is composed of a cylindrical casing with seed filling opening and seed discharging opening, sowing wheel with seed pits consisting of filling hole and internal hole, and a spring for regulating the relative position between said casing and sowing wheel for adapting the different seeds with different sizes.

Description

technical field [0001] The invention relates to agricultural seeding machinery, in particular to a mechanical precision metering device for precision sowing. The seed metering device is especially suitable for precision sowing of large seeds such as corn and soybean. Background technique [0002] Precision sowing has the advantages of saving seeds, reducing field labor for thinning seedlings, increasing crop yields, and reducing seed production fields. It is the only way to modernize agriculture, and it is also one of the important measures to reduce food production costs and increase farmers' income. In developed countries, crops such as corn, soybeans, and sugar beets have already implemented precision sowing. [0003] The key to realizing precision sowing is the heart of the planter—the seed meter can meet the requirements of precision sowing. my country began to study precision seeding in the 1970s, but it has not been widely used so far. There are many reasons for thi...

AI Technical Summary

Problems solved by technology

[0004] Most of the seed metering devices used in foreign precision sowing are pneumatic type. This kind of seed metering device has a complex structure, high price, and strict requirements for use and maintenance.

The hole-shaped wheel-type mechanical seed meter has simple structure, low price, convenient use and maintenance, and reliable operation. Scholars at home and abroad generally believe that the seed meter is an ideal seed meter for sowing large seeds, such as corn and soybeans. There are shortcomings such as strict requirements on seed shape and size, high seed damage rate and unsuitable for high-speed operation.

[0005] The applicant's prior invention patent ZL97122327.0 "Precision Seed Meter for Corn" is a precision seed meter for filling seeds on the inner side of the compound hole. It adopts the working principle of filling seeds inside and clearing seeds by gravity, and the seed damage rate is low. It is suitable for high-speed operation. When the stepped inner socket is used, it can adapt to seeds of different shapes and sizes to a certain extent, but there are still disadvantages such as the complicated manufacturing process of the stepped inner socket and the narrow adaptability of the seed shape and size.

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