Concave tooth-incomplete eccentric circle-non-circular gear planetary system vegetable seedling picking mechanism

Abstract

The invention discloses a concave tooth-incomplete eccentric circle-non-circular gear planetary system vegetable seedling taking mechanism. A conventional seedling taking mechanism adopts a locking arch or a rack-incomplete non-circular transmission mechanism to achieve the purpose that the transmission ratio of a seedling taking track is greatly varied, the locking arch has large transmission impact, and the rack-incomplete non-circular transmission mechanism is not ideal in transmission ratio variation range. A central shaft of the concave tooth-incomplete eccentric circle-non-circular gear planetary system vegetable seedling taking mechanism is fixed together with a planet carrier; a central incomplete eccentric circle-non-circular gear is fixed together with a rack; central concave teeth are fixed together with the central eccentric circle-non-circular gear and are all arranged on the central shaft in a sleeving manner; a first middle circle-non-circular gear is connected with a first intermediate shaft spline; a first convex tooth is fixed with the first middle circle-non-circular gear; a second middle circle-non-circular gear is connected with a second intermediate shaft spline; second convex teeth are fixed with the second middle circle-non-circular gear; a first planetary circle-non-circular gear is connected with a first planetary shaft spline; a second planetary circle-non-circular gear is connected with a second planetary shaft spline; one end of each of a first planetary shaft and a second planetary shaft is fixed with a shell of a seedling taking claw. The concave tooth-incomplete eccentric circle-non-circular gear planetary system vegetable seedling taking mechanism is stable in transmission and small in impact.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and relates to a vegetable seedling picking mechanism, in particular to a concave tooth-incomplete eccentric circle-noncircular gear planetary system vegetable seedling picking mechanism. Background technique [0002] Transplanting has the comprehensive benefits of early crop growth and climate compensation. It can make full use of light and heat resources, and its economic and social benefits are very considerable. Potted seedling transplanting operations in paddy fields and dry land require the development of transplanting and seedling picking mechanisms. [0003] The planetary gear train transmission mechanism has been used in the seedling picking mechanism of transplanting machinery. In order to complete the working process of picking seedlings-pushing seedlings-returning, the tip of the transplanting arm must complete the required motion trajectory. In the existing planetary gear The l...

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Problems solved by technology

[0003] The planetary gear train transmission mechanism has been used in the seedling picking mechanism of transplanting machinery. In order to complete the working process of picking seedlings-pushing seedlings-returning, the tip of the transplanting arm must complete the required motion trajectory. In the existing planetary gear The locking arc mechanism or rack-incomplete non-circular transmission mechanism is used in the seedling picking mechanism to achieve the large-scale change of the transmission ratio required by the seedling trajectory, and the transmission ratio of the locking arc transmission is equivalent to infinity, so when When the locking arc mechanism enters or disengages due to the sudden change of the transmission ratio, it will produce a large impact, which is very unstable and is not conducive to improving the speed of seedling picking; Seedling depth and seedling pushing posture are not ideal

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