Seeder with automatic-controllable seeding quantity

Abstract

The invention discloses a seeder with automatic-controllable seeding quantity, which includes: a machine frame, a three-point suspension apparatus, a seed discharge system, a press wheel, two depth limiting wheels, and a seeding quantity control system. The machine frame includes a left side plate and a right side plate, and a first support beam, a second support beam and a third support beam, which are fixedly connected between the left side plate and the right side plate. The lower suspension point and the upper suspension point of the three-point suspension apparatus are respectively fixedon the first support beam and the second support beam. The seed discharge system includes a plurality of seed discharge units, which are installed on the second support beam in parallel. According tothe invention, rotation speed signals of the two depth limiting wheels are collected; and by means of the seeding quantity control system, the signal with maximum rotation speed serves as a control signal so as to regulate and control the rotation speed and length of an outer groove roller seeding unit. The seeder can enlarge the adjustment range of seeding quantity and is increased in control precision, and reduces the influence on seeding uniformity due to slipping of ground wheels.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, in particular to a sowing rate automatic control seeder. Background technique [0002] In the traditional ground wheel drive seeding method, the transmission ratio determined by the seed meter and the ground wheel ensures the uniformity of the sowing amount, and the adjustment of the sowing amount is realized by changing the transmission ratio and the length of the grooved wheel, and the transmission ratio is realized by replacing the sprocket Adjustment, adjustment and installation are cumbersome, and the number of sprockets cannot be too many, the adjustment range is limited, and stepless adjustment cannot be realized, and this method is prone to slippage under the harsh conditions of high soil moisture and uneven ground surface, which will It will cause uneven sowing amount and affect the quality of sowing. [0003] In response to the above problems, the Chinese patent "Synchro...

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Problems solved by technology

[0004] The above-mentioned technical solutions respectively use the method of controlling the speed of the seed meter and the length of the seed meter to realize the control of the sowing rate. The single sowing rate adjustment method has a limited range of sowing rate adjustment. The present invention realizes the sowing rate control by simultaneously controlling the speed and length of the seed meter. , and the adjustment range is large; the above-mentioned technical scheme uses a single ground wheel speed signal as the control signal, and when the ground wheel slips, it will cause uneven seeding

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