Separating planting mechanism of denatured elliptic gear planetary gear train front planting type transplanter

Abstract

The invention relates to a separating planting mechanism of a denatured elliptic gear planetary gear train front planting type transplanter, and belongs to the agricultural machinery. According to the separating planting mechanism, a sun gear is arranged on a center position of a gear housing; a center drive shaft is inserted into a center hole of the sun gear, and forms a fixed connection with the gear housing; an upper middle shaft with an upper middle gear, a lower middle shaft with a lower middle gear, an upper planetary shaft with an upper planetary gear, and a lower planetary shaft with a lower planetary gear are respectively assembled on both sides of the center drive shaft; the upper middle gear, the lower middle gear, the upper planetary gear, the lower planetary gear and the sun gear are congruent denatured elliptic gears; planting arm housings are vertically and fixedly arranged on outer ends of the upper planetary shaft and the lower planetary shaft; the planting arm housing is provided with seedling planting needles, seedling pushing rods, a poking fork, a reset spring and a cam. With the separating planting mechanism, the tips of the seedling planting needles move in a kidney-shaped static trajectory curve. In addition, the mechanism has characteristics of simple and novel structure, small volume, light weight, small vibration, high work efficiency and good dynamic performance.

Description

technical field [0001] The invention belongs to agricultural machinery, in particular to a modified elliptical gear planetary system front-inserted rice transplanter splitting mechanism. Background technique [0002] The rice transplanting track of the existing rice transplanter in the market is realized by a non-uniform speed transmission mechanism. The applied non-uniform speed transmission mechanisms mainly include elliptical planetary gear trains, eccentric non-circular planetary gear trains, and eccentric displacement planetary gear trains. The pitch curves of these gears are all axisymmetric graphs, and the transmission ratio curves are symmetrical curves, so the adjustable performance of the transmission ratio is relatively poor. The rice transplanter has very strict requirements on the needle trajectory. If the trajectory requirements are met, it is difficult to optimize the speed and acceleration goals. At the same time, with the introduction of wide and narrow ro...

AI Technical Summary

Problems solved by technology

However, due to the poor adjustability of the transmission ratio of the planetary gear train of the original insertion mechanism, the effective offset rate brought by the inclination angle is low; however, increasing the inclination angle will affect the uprightness of the seedlings, and it is easy to damage the seedlings, so it is urgent There is a need for a splitting mechanism with an adjustable transmission ratio of the planetary gear train to improve the performance of the inclined wide and narrow row rice transplanter

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