Wide-narrow row walk rice transplanting machine transplanting mechanism comprising helical teeth, alternate axles and denatured ellipse gears

Abstract

The invention relates to a wide-narrow row walk rice transplanting machine transplanting mechanism comprising helical teeth, alternate axles and denatured ellipse helical gears, and belongs to agricultural machinery. The mechanism utilizes three denatured ellipse gear planetary systems as variable-speed transmission mechanisms, wherein a sun gear is a denatured ellipse helical gear, and the others are both spur gears, an alternate angle is generated between a middle gear axle and a sun gear axle, a planetary gear axle is parallel to the middle gear axle, and a transplanting arm and the planetary gear axle are vertically and fixedly mounted. The mechanism changes the transmission ratio curve of gear transmission through regulating the denatured factor of the denatured ellipse gears, thus improving the use ratio of transverse offset generated by alternate axles, reducing ineffective transverse offset, realizing wide-narrow row rice transplanting meeting agricultural requirements by using the minimum helical angle and avoiding influence of excessive ineffective offset on vertical degree of seedlings.

Description

technical field [0001] The invention belongs to agricultural machinery, and in particular relates to a splitting mechanism of a wide-narrow-row walking rice transplanter with helical gears and staggered-axis denatured elliptical gears. Background technique [0002] Through years of painstaking research on rice planting, agronomic experts have put forward the agronomic requirements for dense planting of rice in wide and narrow rows. The dense planting cultivation technology of rice in wide and narrow rows is conducive to improving ventilation and light transmission, reducing pests and diseases, increasing tiller spike rate, especially for low-yield fields, which can increase yield by 5%-10%. With the agronomic requirements of wide and narrow row dense planting, the wide and narrow row transplanter has also begun to study. The equal row distance transplanter is a relatively mature technology. At present, the wide and narrow row rice transplanters on the market are all improved...

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Problems solved by technology

With the agronomic requirements of wide and narrow row dense planting, the wide and narrow row transplanter has also begun to study. The equal row distance transplanter is a relatively mature technology. At present, the wide and narrow row rice transplanters on the market are all improved on the basis of the equal row distance transplanter. There are two ways to realize it. One is to change the seedling box. Changing the seedling box requires changing the seedling tray, which brings about a change in the seedling raising method, which is contradictory to the mature seedling raising method; second, to ensure that the seedling box remains unchanged. , there are two ways to change the insertion mechanism. One is that the new sun gear shaft forms a small angle with the central axis of the transmission box. This solution needs to change the transmission box, so that the structure of the transmission box increases. constant, which makes the structure too compact and poor in adjustability; the other is to use the interlaced method of planetary gears and intermediate helical gears to make the needles move in an inclined plane. The gear train is the original elliptical gear, eccentric-non-circular gear. The transmission ratio of these gears is symmetrically distributed. Under the premise of meeting the requirements of rice planting, the utilization rate of the lateral offset caused by the inclined surface is low, and the inclined surface needs to be increased. The helix angle of the gear is realized, which intensifies the wear of the gear, and too much invalid offset affects the uprightness of the seedlings, which is easy to damage the seedlings; while using the non-circular helical gear space staggered method alone to achieve wide and narrow rows, the processing cost of the non-circular helical gear high

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