Inner filling type corn seed-metering device

Abstract

The invention relates to an inner filling type corn seed-metering device for precision sowing, which aims at resolving the problems that in the existing seed-metering, when a seed-metering wheel is low in rotating speed, hole rate exists, and when the seed-metering wheel is high in rotating speed, double grains or multi-grains exists. The technical scheme is that a shaft rod of the seed-metering wheel is sleeved in a center hole of the casing, and the shaft rod of the seed-metering wheel is in sliding match with the center hole of the casing. A seed-metering square shaft is arranged in a square hole of the shaft rod of the seed-metering wheel, and an adjusting nut and a spring are fixed on the shaft rod of the seed-metering wheel. An inner seed protective plate is arranged on the inner lateral wall of the casing, a seed inlet communicated with a seed box is arranged on the lateral wall of the casing, a seed filling port is further arranged on the cylindrical face of the casing, and a lateral seed discharge groove and a radial seed discharge groove are respectively arranged on the inner lateral face and the inner cylindrical face at the position of the seed filling port of the casing. Interference grooves and interference ribs are arranged on the lateral wall of the casing corresponding to a seed cleaning area, column-shaped filling holes and inclined lateral wall inner nest holes connected with the filling holes are distributed on the outer edge of the seed-metering wheel at intervals, and a round nest-shaped pit is arranged at the bottom of each inner nest hole respectively.

Description

technical field [0001] The invention relates to a mechanical precision seed metering device for precision sowing, which is suitable for precision sowing of corn seeds. Background technique [0002] The patent applied for and approved by the applicant is "Combined Hole Precision Seed Meter", Patent No. 200410011100.1. By changing the width of the inner hole, the seed meter can adapt to a wider range of seed shapes and sizes. However, it can be seen through experiments that when the seed wheel rotates at a low speed, there is still a void rate, the main reason being that a seed in the inner nest hole falls out; when the seed wheel rotates at a high speed, there are also double seeds or Multiple seeds, the main reason is that multiple seeds are stuck in the filling hole. In order to solve the above two problems, the present application is proposed. Contents of the invention [0003] The purpose of the present invention is to overcome the problems of existing seed metering d...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of existing seed metering devices with void rate when the rotation speed of the seed metering wheel is low, and double or multiple grains when the rotation speed of the seed metering wheel is high, and provide a kind of inner filling corn seed metering The device makes a pit at the bottom of the inner nest so that when the rotation speed of the seeding wheel is low, a seed entering the inner nest is not easy to fall out, thereby reducing the void rate; at the same time, in the corresponding seed clearing area Interference grooves are made on the side wall of the housing, so that when the seed wheel rotates at a high speed, the seeds stuck in the filling hole can fall out of the filling hole after being disturbed, thereby reducing the rate of double or multiple seeds, so that So that the seed meter can achieve the purpose of precise seed metering within a wide speed range

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