Helical gear-non-conical gear cross-axis planetary gear system transplanting mechanism for pot seedlings in wide and narrow rows

Abstract

The invention discloses a wide / narrow row potted-seedling transplanting mechanism with bevel gear and noncircular bevel gear crossed-axis planetary gear trains. A seedling needle of the existing wide / narrow row rice potted-seedling transplanting mechanism is large in lateral offset, inaccurate in seedling taking position and very low in seedling taking rate during seedling taking. According to the wide / narrow row potted-seedling transplanting mechanism, two planetary gear trains are symmetrically arranged at two ends of a central shaft and are driven by four-stage gear pairs, wherein the first-stage gear pair is a crossed-axis cylindrical bevel gear pair, and the second-stage, third-stage and fourth-stage gear pairs are noncircular bevel gear pairs. By using the planetary gear trains, a rice transplanting point can laterally offset relative to a seedling taking point after a seedling is taken by a seedling taking claw, so that the wide / narrow row potted-seedling planting is realized, and the seedling taking claw can favorably form an 8-shaped spatial motion track; and compared with two-stage gear transmission, the four-stage gear transmission has the advantages that the minimum lateral offset of the track during seedling taking can be up to 1.8mm, and the seedling taking claw is in a straight seedling taking posture, so that the seedling taking success rate is ensured. Meanwhile, the four-stage transmission can keep transmission ratio curves of all levels of gears more flat and is beneficial to generation of the noncircular bevel gears meeting the requirements of convexity and pressure angles.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and relates to a high-speed pot seedling wide and narrow row transplanting machine, in particular to a helical gear-non-conical gear staggered axis planetary gear train mechanism for pot seedling wide and narrow row transplanting. Background technique [0002] At present, there are various types of rice transplanters, but whether it is transplanting in wide and narrow rows or transplanting in equal rows, the seedlings taken by the transplanting mechanism are all blanket-shaped seedlings, which are easy to damage the roots. The seedlings taken by the pot seedling wide and narrow row transplanting mechanism are pot seedlings, and there is no root packing phenomenon between the pots and pots, so there is no problem of root damage during the seedling picking process. Compared with blanket seedlings, transplanting has a shorter This is of great significance for increasing rice yield. [0003] Wi...

AI Technical Summary

Problems solved by technology

Prior to this, a two-stage non-conical gear-driven transplanting mechanism for rice pot seedlings in wide and narrow rows has been realized. However, in actual operation, due to the excessive lateral offset of the seedling needle at the seedling picking section, the seedling picking position is inaccurate. , especially in the actual operation, the position of the seedlings is irregular, and the rate of picking seedlings is very low

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