Seed metering and distributing device for precision drill

Abstract

The invention discloses a seed metering and distributing device for a precision drill, which comprises a seed taking mechanism and a conveying mechanism. The seed taking mechanism is provided with a seed room (5) consisting of a movable disk (2) and a fixed disk (6) and a seed discharge pipe (8); and the conveying mechanism is a conveyor belt type conveying mechanism and comprises a driving roller (10), a driven roller (15), a conveyor belt (12), a seed retaining plate (11) and a seed protection groove (9). The seed metering and distributing device is characterized in that both the movable disk (2) of the seed taking mechanism and the driving roller (10) of the conveying mechanism are provided with driving gears (16, 18); and a middle transmission gear (13) is arranged between the driving gears (16, 18). Compared with the prior art, the gears or chain wheels are adopted to carry out forced synchronization, so that the seed metering and distributing device not only has high seed taking accuracy and stable performance and can be suitable for various different soil conditions, but also has very stable seeding intervals and is particularly suitable for carrying out precision drilling in the harsh environment such as the no-tillage stubble field.

Description

technical field [0001] The invention relates to a sorting and distributing device for a seeder, in particular to a sorting and distributing device for a precision seeder. Background technique [0002] With the popularization and application of precision agriculture technology, the role of the seeder in planting is becoming more and more important, and the seed meter is the core component of the planter machinery, and its working performance directly affects the quality of sowing. [0003] At present, the precision seed metering devices used on seeders mainly include mechanical seed picking and air suction seed picking, which basically solve the problem of accurate seed picking, and have stable and reliable performance. The pipeline transports the seeds to the ground. The seed metering device of this kind of planter is installed at a high position, which will lead to a high seeding point. The seeds leave the seeding port and are affected by the acceleration of gravity during ...

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Problems solved by technology

However, the defects are also relatively obvious, mainly due to the space position, the installation position of the seed meter is relatively high, generally it is necessary to install a seed guide tube under the seed meter, and the conveying distance of the guided seeds increases before landing, which changes to a large extent. The falling time of the seeds, which in turn leads to an increase in the difference in the falling time of the seeds. In addition, the absolute speed of the seeds when they fall into the seed ditch is relatively high and bounces, which affects the accuracy of the planting distance, so it is difficult to achieve accurate high-speed sowing with small plant spacing.

[0006] Chinese patent CN202035277U discloses a kind of seed arrangement and distribution device of a planter, which realizes a relatively accurate arrangement through an air-suction seed-taking mechanism and a conveyor belt-type conveying mechanism. It can adapt to various soil conditions, especially in no-tillage stubble land, but in practice, the actual distribution of seeds often does not adhere to the expected phenomenon, that is, the uneven distribution of seeds in the seed ditch , the main reason is that the sowing environment in the stubble field is too poor, and various sundries cause the seed picking mechanism and the conveying mechanism to slip due to excessive resistance, so that the above-mentioned components cannot work synchronously, which in turn causes uneven seed distribution.

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