A front-filling precision seed metering device

Abstract

The invention provides a front-side seed-filling precise seed-metering device and belongs to the technical field of agricultural seed metering. The left portion of a main shaft is sleeved with a seed metering assembly, a cylindrical boss of a transmission disc is sleeved with a through hole of a cam end cover, and an elastic pin penetrates through a pin hole II of the cylindrical boss and a pin hole I of the main shaft to be fixedly connected with the seed metering assembly and the main shaft. The right portion of a stair of the main shaft is sequentially sleeved with a bearing II, a sleeve and a bearing I. Inner rings of the two bearings are in clearance fit with the main shaft, and the sleeve is movably matched with the main shaft. Outer rings of the two bearings are in clearance fit with the inner ring of a bearing block of a shell. A bolt set I is fixedly connected with the end cover and the shell through a through hole group I of the cam end cover and a threaded hole pair of the shell. A circular face, an inner side face, an arc face and the seed metering assembly form a seed cavity. When the seed-metering device is filled with seeds, a seed obtaining hole right faces the seeds, relative seed-filling speed of the seeds and the seed obtaining hole can be increased, and seed-filling time is shortened. When the seed-metering device works at high speed, the seed-filling success rate can be guaranteed, and the miss-seeding rate is reduced.

Description

technical field [0001] The invention belongs to the technical field of agricultural seed metering, and in particular relates to a front-loading precision seed metering device. Background technique [0002] The current precision seed metering devices mainly include pneumatic type and mechanical type. The former uses pneumatic force to arrange seeds, which consumes a lot of power and is affected by the speed of power traction, so the structure is complicated. The latter uses the gravity and inertia of the seeds during the forward process to fill the seeds. When the common mechanical seed meter is working, the seeds are filled from the side of the hole. At this time, the direction of the seed filling movement is perpendicular to the movement direction of the hole. , when the speed of the seed meter increases, the linear speed of the hole increases. At this time, the hole is equivalent to a closed surface, and the seeds do not have enough time to enter the hole, which increases ...

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Problems solved by technology

[0003] In order to solve the problem that the seeds do not have enough time to enter the hole when the speed of the existing mechanical seed metering device increases, the patent of this invention designs a front-filling precision seed metering device. When the seed metering device is working, the seeds are facing Filling the hole, the movement direction of the seed filling and the movement direction of the hole are on the same straight line and the direction is opposite, which reduces the time of filling the seed. When the seed meter is working at high speed, it can also ensure the success rate of filling and reduce the Missed broadcast rate

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