Circle-ellipse pitch curve gear planetary system transmission case of transplanting mechanism

Abstract

The invention discloses a circle-ellipse pitch curve gear planetary system transmission case of a transplanting mechanism, which comprises a gear sun wheel, a planet carrier, a stander, two intermediate gears, two planting arm gears, two planting arms and two seedlings needles; the transmission ratio design of the transmission gear of the transplanting mechanism is suitable for the seedlings transplanting path of the large seedlings; the pitch curve of the elliptic gear is formed by the means that a section of circular curve is in smooth connection with a section of elliptic curve, the seedlings needles are even in moving speed when the seedlings needles are used for pushing the seedlings due to the circular part of the pitch curve, the seedlings needles are lift up after a seedlings pushing rod is used for pushing the seedlings into the mud, the movement locus of the seedlings needles is changed to be small in a plant pit in the mud, and the seedlings laying and the seedlings floating are hardly generated; and the seedlings movement locus has the minimum attack to the seedlings due to the elliptic part of the pitch curve when the seedlings are withdrawn by the seedlings needles, so that the seedlings are hardly injured.

Description

technical field [0001] The invention relates to a rice transplanter, in particular to a planting mechanism of a rice motorized transplanter. Background technique [0002] The rotary splitting mechanism used in the rice transplanter has the advantages of high working efficiency and good mechanical power performance. However, the design of the elliptical gear train of the rotary subplanting mechanism is mainly adapted to the transplanting of milk seedlings (ie small seedlings) at present, and cannot adapt to the transplanting of large seedlings, and many varieties of late rice of double-cropping rice need large seedlings for transplanting; existing eccentric gears, etc. The movement trajectory of the elliptical gear train splitting mechanism will hit the seedlings against the seedlings or the impact force is relatively large when picking seedlings, and the damage to the seedlings is serious; moreover, the movement trajectory will cause the planting pits of the seedling needles...

AI Technical Summary

Problems solved by technology

However, the design of the elliptical gear train of the rotary subplanting mechanism is mainly adapted to the transplanting of milk seedlings (ie small seedlings) at present, and cannot adapt to the transplanting of large seedlings, and many varieties of late rice of double-cropping rice need large seedlings for transplanting; existing eccentric gears, etc. The movement trajectory of the elliptical gear train splitting mechanism will hit the seedlings against the seedlings or the impact force is relatively large when picking seedlings, and the damage to the seedlings is serious; moreover, the movement trajectory will cause the planting pits of the seedling needles in the mud to become larger, which is easy to cause lodging and floating seedlings, it is necessary to study a new type of elliptical gear pitch curve, so that the trajectory of the needle movement formed by the change of the transmission ratio can adapt to the transplanting of large seedlings, and the damage to the seedlings is small when the seedlings are taken, and the phenomenon of inverted seedlings and floating seedlings is not easy to occur

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