Air-aspiration type precise seed taking device

Abstract

The invention relates to a component for an agricultural seeding machine, in particular to an air-aspiration type precise seed taking device which can be used for a precise seeding machine. The air-aspiration type precise seed taking device mainly comprises a negative pressure cavity (1), a seed sucking disc (3) and an installation shaft (4), wherein the seed sucking disc (3) is fixedly connected to the end part of the negative pressure cavity (1); the installation shaft (4) is connected with the negative pressure cavity (1) through a bearing (6); an air stopping block is arranged in the negative pressure cavity (1); the air stopping block is connected with the installation shaft (4) and is in sliding or rolling fit with the seed sucking disc (3); and the contact area between the air stopping block and the seed sucking disc at least covers one seed sucking hole (2). The invention has the advantages that: the overall structural design is scientific, the transmission is stable, and the rotation of the negative pressure cavity is combined with the air stopping of a sliding block to realize precise seeding; the air tightness of the negative pressure cavity is good, thus the negative pressure is more stabilized, the seed taking rate is improved, and the hole rate is reduced; the service life of the seed sucking disc is prolonged, and the power consumption is reduced; and the negative pressure seal is airtight and reliable, and the service performance is stable, thus the precise seed taking quality and stability are further improved.

Description

technical field [0001] The invention relates to a component on an agricultural seeder, in particular to an air-suction precision seed picking device, which can be used on a precision seeder. technical background [0002] The usual air-suction seed picker (or seed divider) consists of a seed suction disc and a negative pressure chamber. When in use, the seed suction disc is fixed on the end face of the negative pressure chamber through a coupling shaft, and the seed suction disc is a disc. , along the circumferential direction of the edge of the disk, equidistant seed suction holes are evenly distributed. When working, the air is sucked through the suction pipe connected to the negative pressure chamber, and the seed suction disk is driven by the central shaft to rotate on the end face of the negative pressure chamber. The purpose of the rotation of the seed suction disc is to complete two tasks, one is to suck the seeds to the seed suction holes (one or two); The bottom of ...

AI Technical Summary

Problems solved by technology

Among them, the air-suction precision seed picker is mainly composed of a negative pressure cavity and a seed suction plate. The seed suction plate is fixed on the end face of the negative pressure cavity. When working, the seed suction plate and the negative pressure cavity rotate relatively. Specifically speaking, the negative pressure chamber is fixed on the bracket, and the suction disk rotates. Such a structure is difficult to ensure the stability of the negative pressure in the negative pressure chamber. The reason is that when the suction disk rotates, the distance between the suction disk and the negative pressure chamber There is an inevitable gap at the joint, which leads to air leakage. The size of the air leakage is an important factor to ensure the stability of the negative pressure of the product. Therefore, technicians in the same industry have been expecting to control the air leakage through the improvement of materials and the design of the matching method, but Due to the structural problems of the design itself, it has not been substantively resolved

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