Hydraulic push type precision seeding device

Abstract

The invention provides a hydraulic pushing type precision seed-metering device. The hydraulic pushing type precision seed-metering device comprises a seed box with a sealing cover plate; a water inlet hole (3) is formed in the upper part of the seed box; the bottom of the seed box is communicated with a step diameter-variable pipe (16); the step diameter-variable pipe is communicated with a first water passing hole of a vertical seed-metering pipe (13); a filter screen is arranged at the rear end of the first water passing hole and is connected with a reflowing water pipe (9); a seed push rod (6) sleeved with a spring is inserted into the vertical seed-metering pipe; a cam is arranged on the top of the seed push rod; a second water passing hole (18) is formed in the upper part of the vertical seed-metering pipe; a third water passing hole (9) is formed in the upper part of the seed push rod; the front end of the second water passing hole is connected with the reflowing water pipe and the tail end of the second water passing hole is connected with a water inlet pipe of a water pump; a water outlet pipe of the water pump is communicated with the seed box; when seeds are pushed in sequence, the second water passing hole and the third water passing hole are aligned and water reflows into the seed box; when the seeds are metered, the second water passing hole and the third water passing hole are staggered, and the reflowing water pipe is not communicated with the water inlet pipe of the water pump; and an elastic pipe (14) is arranged at the tail end of the vertical seed-metering pipe, and the inner diameter of the elastic pipe is one half of the diameter of the seeds.

Description

technical field [0001] The invention relates to a seed metering device for agricultural planting machinery, in particular to a hydraulic push type precision seed metering device which realizes precise seed metering through the joint action of hydraulic power and mechanical force. Background technique [0002] The seed metering device is the key core component of the seeder. At present, there are mainly two types: mechanical type and pneumatic type. Among them, the mechanical seed metering device has a simple structure, low cost and wide application range, but the seed metering precision is restricted, especially the broken rate. , Missing seeding rate and other indicators are relatively high, so it is often used in occasions where the accuracy of extensive seeding is not high; pneumatic seeding has high precision, which belongs to the type of precision seeding, and is often used in large-scale seeding machinery, but due to complex processing, The cost is high and restricted,...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a precision seed metering device with a simple structure and low cost in view of the problems that the precision of the existing mechanical seed metering device is restricted, the processing of the pneumatic seed metering device is complicated, and the cost is high. The hydraulic push type precision seeding device

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