Self-suction type precision seed metering device with seed loading and unloading functions

Abstract

The invention relates to a self-suction type precision seed metering device with seed loading and unloading functions. Specifically, an existing pneumatic seed metering device is improved to solve theproblems of the existing pneumatic seed metering device, such as poor sealing performance, serious abrasion, repeated replacement of seal rings, unreasonable distribution of seed groups in a workingair chamber of the seed metering device, complicated transmission system pipelines, low working speed, high energy consumption, and high requirements on fan and power transmission. An eccentric shaftpiston mechanism is arranged in the seed metering device, a guide rod mechanism is driven by the power of a low-horsepower tractor to rotate, a piston reciprocates to alternately generate negative pressure and positive pressure, and accordingly, seed suction and discharge are realized. A large quantity of seeds can be saved, large power output required by negative pressure generation by the fan isreduced, the energy consumption is integrally reduced, and the economical practicability of a seeding machine is improved.

Description

technical field [0001] The invention belongs to the field of precision seed metering devices for agricultural machinery, and in particular relates to a self-priming precision seed metering device for picking and discharging seeds. Background technique [0002] Precision seeding technology is one of the key links in the whole mechanization of crop production. The seed meter is the core component of the precision seeder, and its performance directly affects the sowing quality. Especially with the popularization and application of precision agriculture technology, the requirements for sowing density and row spacing are getting higher and higher. Present hole sower or on-demand device generally adopts mechanical or air suction mode to get seed. The mechanical seed picking mechanism is relatively complicated and takes up a lot of space. When the sowing density reaches a certain level, it is difficult to increase it. One of the biggest shortcomings of the mechanical mechanism is...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the existing air-suction precision seed metering devices with poor sealing performance, severe wear and tear, frequent replacement of sealing rings, unreasonable distribution of seed populations in the working air chamber of the seed metering device, and complicated pipelines in the transmission system. High consumption, high requirements for fan and power transmission, etc., design a small horsepower tractor's own power to drive the rotating guide rod mechanism, so that the reciprocating movement of the piston generates negative pressure to adsorb seeds, reducing the need for large power output caused by using the fan to generate negative pressure Power waste problem, thereby reducing energy consumption, can meet the characteristics of wheat planting

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