An air-suction adjustable-pitch spiral bevel tooth metering device

Abstract

An air-suction adjustable pitch spiral bevel tooth metering device belongs to the technical field of agricultural machinery sowing machinery. The retaining ring, the right end cover, the suction pipe, the lead screw, the drive part of the lead screw, the motor, the seed protection plate, the spring, and the seed wheel partition are connected. The structure is simple and the working principle is clear. The seed meter adopts symmetrical spiral bevel teeth. The structure can reduce the phenomenon of seeding pulsation; at the same time, the air suction structure is adopted to improve the filling performance. Through the screw pitch adjustment mechanism, the opening of the spiral bevel tooth groove can be adjusted to realize the control of the seeding amount; by setting the seed guiding device , to ensure uniform and accurate plant-to-plant spacing after planting, and greatly improve the qualified rate of seed-to-plant spacing.

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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