Technical field

The invention belongs to the technical field of agricultural seeder, in particular to an automatic quantitative seed feeding device for a precision seeder.

Background technique

Sowing is an important link in the process of agricultural production. With the rapid development of economy and society, the continuous progress of agricultural science and technology, and the implementation of precision agriculture, higher requirements are put forward for sowing quality. Seeder is the main means to realize mechanization and precision seeding technology, and its performance directly affects the quality of seeding and the growth of crops and yield.

Precision planter for seedling cultivation is a kind of air-sucking vibrating disc precision planter, which can overcome many shortcomings of mechanical sowing device. The requirement for seeds’ geometric size is not high, it’s easy to achieve single seed,  and is with high operation speed and low seed damage rate. In the seeding made by air suction vibrating disc precision seeder, the requirement for seed layer thickness of the seed plate is strict. The seed layer thickness must be kept in a suitable range, otherwise, it will not be able to make the seed group under the action of vibration to achieve "boiling" motion state, resulting in bad seeds absorption of some suction cup holes, which leads to seeding holes.

However, the existing seed supply device can not realize the accurate control of the seed thickness of the seed plate, and can not make the seed of the seed plate keep the "boiling" motion state at all times, so it can not guarantee the precision sowing requirements of the air suction vibrating disc precision seeder.

Invention content

Aiming at the deficiency of the existing technology, the invention provides an automatic quantitative seed feeding device for an air-sucking vibrating disc type precision seeder, which can realize automatic quantitative and accurate seed feeding, so that the seed is always in the "boiling" motion state when the thickness of the seed layer in the vibrating seed tray meets the requirement. The seed damage degree is low, one seed supply can make the seeder working time longer; In addition, the seed supply can be set quantitatively according to the actual needs, which provides conditions for realizing the precision sowing of air-sucking vibrating disc seedling in the field.

The invention has the advantages of:

(1) Automatic quantitative seed supply can be realized, and the seed supply can be set according to the needs of seed suction, improving the automation degree of the seeder.

(2) Equipped with a groove of the belt and the first cavernosa seed protection block, the second cavernosa seed protection block. When more seeds are on the belt, the first cavernosa seed protection block can effectively control the thickness of the seeds. The cavernosa material is so soft that seed damage is not high. When breeding in winter, the seeds will become wet due to the temperature difference, which leads to seeds sticking on the conveyor belt. The second cavernosum seed protection block can wipe down the seeds from the conveyor belt, extending the seeder's working time for one time’s seed supply, thus making the sowing efficiency greatly improved.

(3) Reasonable structure design, simple structure, easy to control, low processing cost and high planting accuracy.