Air-suction type adjustable-pitch helical bevel gear seed sowing device

Abstract

The invention provides an air-suction type adjustable-pitch helical bevel gear seed sowing device, and belongs to the technical field of seeding machines in agricultural machinery. The seed sowing device structurally comprises a shell, a left check ring, a left end cover, a seed sowing shaft, a belt, a seed guide device, a seed sowing wheel, a right check ring, a right end cover, an air suction pipe, a screw, a screw drive part, a motor, a seed protecting plate, springs and a seed sowing wheel partition. The air-suction type adjustable-pitch helical bevel gear seed sowing device is simple in structure and adopts a clear working principle, the seed sowing device adopts a symmetric helical bevel gear structure, and therefore, the phenomenon of seed sowing pulsation can be reduced; meanwhile,with adoption of the air-suction structure, seed filling performance is improved, and by means of a screw pitch adjusting mechanism, opening of a helical bevel gear groove can be adjusted, and control for seed sowing amount is realized; and the seed guide device is arranged, so that uniform and accurate plant spacing after seed charging is ensured, and qualification rate of seed plant spacing isgreatly increased.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery sowing machinery, and relates to a seed metering device, in particular to an air-suction adjustable distance spiral bevel tooth seed metering device. Background technique [0002] The seed meter is the core component of the seeder and the main factor that determines the characteristics of the seeder and the quality of sowing. The working performance of the seed meter will directly affect the working efficiency of the seeder and the quality of crop emergence. The outer groove wheel type seed meter is the most commonly used seed meter on the seeder at present. It has the advantages of simple structure, good versatility, and stable seeding rate. The seeds are forced to be discharged by moving the seeds. When the grooved wheel turns to the groove, more seeds are discharged, and the teeth are less. Therefore, the seed flow is pulsating, which affects the uniformity of the seeds, and the...

AI Technical Summary

Problems solved by technology

The outer groove wheel type seed meter is the most commonly used seed meter on the seeder at present. It has the advantages of simple structure, good versatility, and stable seeding rate. The seeds are forced to be discharged by moving the seeds. When the grooved wheel turns to the groove, more seeds are discharged, and the teeth are less. Therefore, the seed flow is pulsating, which affects the uniformity of the seeds, and there will be leakage of seeds when filling the seeds. And the amount of seeding can not be controlled

In addition, after the seeds leave the metering device, they fall freely in the seed guide tube under the action of gravity. During the process, the seeds are inevitably disturbed by the airflow, and there are phenomena such as collision, bounce and friction at the same time. The above factors make The uniformity of the initial throwing of the seeds from the seed metering device changes, resulting in uneven landing points and uneven plant spacing after the seeds leave the seed guide tube, which affects the growth of the crops to a certain extent

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