Two-stage seed metering and sowing machine for natural grassland re-sowing

Abstract

The invention discloses a two-stage seed metering and sowing machine for natural grassland re-sowing, belonging to the technical field of agricultural machinery. The device comprises a stirring unit, a first-stage seed box, a remaining seed receiving box, a second-stage seed box, an eccentric shaft structure, a vibrating sieve plate unit, an eccentric shaft chain wheel, a first-stage seed metering unit, a stirring shaft chain wheel and a first-stage seed metering unit transmission chain wheel. After seeds enter the first-stage seed box, the stirring shaft chain wheel drives a plurality of rows of flexible brushes on the stirring shaft to rotate, so as to prevent the phenomenon that the seeds with poor flowability in the first-stage box are underlay-free. The seeds discharged from the first-stage seed box can uniformly flow in a split manner into four seed metering ports of the second-stage seed box via two sieve plates of the vibrating sieve plate unit, to solve the problems of a general seed metering unit such as large discharge capacity and unstability of small-size seeds of such as pasture. The vibrating sieve plate unit applies the eccentric shaft structure so that the sieve plate can reciprocate. The remaining seed receiving box can receive the remaining seeds that fail to fall into the second-stage seed box from the vibrating sieve plate.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery devices, and in particular relates to a secondary row seeding planter suitable for supplementary sowing of natural pastures. Background technique [0002] The total area of ​​grassland in the world is about 6.557 billion hm 2 , of which 3.211 billion hm of permanent grazing land 2 , 3.546 billion hm of sparse forest grassland and other types of grassland 2 . Chinese grasslands are located in the range of 20°-51° north latitude, with a wide distribution area. The total area of ​​natural grassland in the country is 6 billion mu (the national grassland resource survey data in 1990), accounting for 41.7% of the country's land area, of which the usable area is 4.74 billion mu. Grassland types are divided into 18 major categories, more than 20 subcategories, and more than 800 types. Grassland degradation and desertification are also serious due to reasons such as unreasonable use, po...

AI Technical Summary

Problems solved by technology

[0003] Grass sowing technology is of great significance to the development and improvement of grassland resources. Due to the small thousand-grain weight and poor fluidity of forage seeds, it has been difficult to achieve even and small amount of seeds to the grassland during the sowing process.

Although the application of pneumatic seeders can achieve the effect of precise sowing, but the price of pneumatic seeders is expensive, and it is difficult to achieve uniform and small amount of sowing. The application of the seeding process is restricted

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