Seeding quantity adjustment and seeding grain distance adjustment dual-adjustment combined seed-metering device

Abstract

The invention discloses a double-adjustment combined seed-metering device for adjusting the seeding quantity and the seeding grain distance, and belongs to agricultural machinery. A supporting plate, an upper disc, an arc-shaped seed box and a seed box limiting cover cylinder are sequentially assembled in an annular frame from bottom to top in a supported mode through rollers, a track disc is fixedly installed on the lower end face of the supporting plate through bolts, a seeding quantity adjusting knob is inserted in the center of the upper disc and the center of the supporting plate, and a grain distance adjusting knob is inserted in the center of the seeding quantity adjusting knob. A grain distance adjusting disc fixedly installed at the lower end of a grain distance adjusting knob is hinged to a lower seed containing pipe through a connecting rod, an upper seed containing pipe and the lower seed containing pipe are assembled on an upper disc and a supporting plate respectively in a radial moving mode, the upper seed containing pipe is inserted into the lower seed containing pipe in a vertically moving mode, and a power frame is arranged on the lower portion of a track disc. A power output shaft of the bevel gear transmission box is fixedly mounted with the power frame; according to the device, the seeding quantity and the seeding grain distance can be adjusted on one seed-metering device, and the device is unique and reasonable in structure, wide in application range, high in adaptability and simple and convenient to adjust and operate.

Description

technical field [0001] The invention belongs to agricultural machinery, and mainly relates to a mechanical seed metering device for adjusting the seeding rate and the seeding grain distance. Background technique [0002] In order to meet the agronomic requirements of different sowing operations, the sowing amount and sowing grain distance of the seed metering device on the unit area need to be adjusted. The traditional adjustment method is to change the sprocket transmission ratio between the ground wheel driven by the planter and the seed metering shaft of the seed meter to complete and realize, that is, when the sowing amount per unit area increases, the sowing grain distance decreases; when the sowing amount decreases , the sowing distance increases accordingly. However, in actual production and use, when the sowing amount per unit area increases, the sowing grain distance does not need to be changed, or even needs to be increased without decreasing the sowing grain dist...

AI Technical Summary

Problems solved by technology

However, in actual production and use, when the sowing amount per unit area increases, the sowing grain distance does not need to be changed, or even needs to be increased without decreasing the sowing grain distance, or needs to be increased or decreased only when the sowing grain distance remains unchanged. Small unit area seeding rate adjustment, or the unit area seeding rate and seeding grain distance need to be changed and adjusted separately at the same time. Obviously, the various seed metering devices currently in use can no longer adapt to and meet the above operation adjustment requirements.

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