Type hole volume variable type precision seed metering device

Abstract

The invention discloses a type hole volume variable type precision seed metering device, belonging to the technical field of agricultural machines. A bearing outer ring is in interference fit with a bearing seat of a seed box, a bearing inner ring is in interference fit with a power input shaft of a type hole disc, a pin shaft hole of a V-shaped seed pushing rod in a driving disc assembly is movably connected with a pin shaft of the type hole disc, a side cover of the type hole disc is fixedly connected with the type hole disc by virtue of countersunk head screws, a boss on the side cover of the type hole disc covers the top of the pin shaft of the type hole disc, a driving disc shaft of a driving disc in the driving disc assembly is movably connected with a driving disc shaft base of a disc II in an adjustment disc, and the adjustment disc is connected with a left lower vertical plate and an arc plate of the seed box by virtue of adjustment holes through screws. By adopting the type hole volume variable type precision seed metering device disclosed by the invention, the damaging probability of seeds caused by the seed metering device in seed filling, seed cleaning and seed charging processes can be reduced, the volume of type holes generated when the type holes rotate to a seed cleaning area can be changed by adjusting the adjustment disc, and the precision seeding requirements of seeds with a wider size range can be met without changing the type hole disc.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a mechanical seed metering device for precision sowing. Background technique [0002] Row crops such as corn, soybeans, sugar beets, sorghum and cotton are already commonly used for precision seeding. Precision sowing can save a lot of high-quality seeds; make the seedlings uniform, strong and uniform, improve the effect of thinning and setting seedlings, and even completely cancel the operation of thinning and setting seedlings; the seedlings are evenly distributed, with good ventilation and light transmission, and can make full use of the water in the soil. Nutrients and water are conducive to stable and increased production. The key to realize precision sowing is the seed meter. [0003] Precision seed metering device can be divided into mechanical type and pneumatic type. Most of the seed metering devices used in foreign precision seeding are pneu...

AI Technical Summary

Problems solved by technology

In addition, the size of seeds of the same variety is often different. It often happens that one larger seed or several smaller seeds get stuck in the hole and cannot be planted, resulting in missed sowing.

For this reason, many seed metering devices have added a seed cleaning sheet, which is inserted into the hole to remove the seeds. Since the seed cleaning sheet is very thin and the speed of the seeds is very fast, the seeds are easily damaged during the seed removal process.

These shortcomings limit the scope of application of the type hole seed meter to a large extent

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