An elliptical-incomplete non-circular and circular gear planetary vegetable seedling picking mechanism

Abstract

The invention discloses a vegetable seedling taking mechanism adopting planetary systems comprising elliptical, incomplete non-circular and circular gears, and aims to solve the problem of large transmission impact due to the fact that a conventional seedling taking mechanism adopts a locking arc for realizing large-range change of a transmission ratio of the seedling taking track. According to the mechanism, a center shaft is fixed with a planet carrier, a center incomplete non-circular gear is fixed with a rack, a center incomplete circular gear is fixed with the center incomplete non-circular gear, and the center shaft is freely sleeved with the center incomplete circular gear and the center incomplete non-circular gear; a first middle elliptical gear and a first middle shaft are connected through a spline, and a first middle incomplete circular gear is fixed with the first middle elliptical gear; a second middle elliptical gear is connected with a second middle shaft through a spine, and a second middle incomplete circular gear is fixed with the second middle elliptical gear; a first planetary elliptical gear is connected with a first planetary shaft through a spine, and a second planetary elliptical gear is connected with a second planetary shaft through a spine; and one end of the first planetary shaft and one end of the second planetary shaft both extend out of the planet carrier to be fixed with a casing of one seedling taking claw. According to the mechanism, the transmission is stable, and the impact is small.

Description

technical field [0001] The invention belongs to the field of agricultural machinery, and relates to a vegetable seedling picking mechanism, in particular to an ellipse-incomplete non-circular and circular 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 locking a...

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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 is used in the seedling picking mechanism to achieve the large-scale change of the transmission ratio required for the seedling picking track. The transmission ratio of the locking arc transmission is equivalent to infinity, so in the transition stage between the locking arc transmission and the gear transmission, Due to the huge mutation of the transmission ratio, the transmission of the mechanism has a great impact and is very unstable, which is not conducive to improving the speed of seedling picking

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