A rack-incomplete non-circular-elliptical gear planetary system vegetable seedling picking mechanism

Abstract

The invention discloses a tooth bar-incomplete non-circular-elliptical gear planetary system vegetable seedling-taking mechanism. The existing seedling-taking mechanism utilizes a locking arc to realize long-range change of a transmission ratio of a seedling-taking locus so that mechanism transmission impact is large. According to the tooth bar-incomplete non-circular-elliptical gear planetary system vegetable seedling-taking mechanism, a center shaft and a planetary carrier are fixed, a central incomplete non-circular gear and a frame are fixed, a central rack and the central incomplete non-circular gear are fixed, the central incomplete non-circular gear and the central rack sleeve the center shaft without key joint, a first middle elliptical gear is in a splined connection relationship with a first middle shaft, a first middle incomplete non-circular gear and the first middle elliptical gear are fixed, a second middle elliptical gear is connected to a second middle shaft by a spline, a second middle incomplete non-circular gear and the second middle elliptical gear are fixed, a first planetary elliptical gear and a first planetary gear shaft are connected by a spline, a second planetary elliptical gear and a second planetary gear shaft are connected by a spline, and one end of each one of the first planetary gear shaft and the second planetary gear shaft stretches out of the planetary carrier and then is fixed to the housing of a seedling-taking claw. The tooth bar-incomplete non-circular-elliptical gear planetary system vegetable seedling-taking mechanism has the advantages of stable transmission and small 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 rack-incomplete non-circular-elliptical 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 arc mech...

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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 rotation speed of the intermediate gear and the planetary gear has a great mutation, and the transmission of the mechanism has a great impact and is very unstable, which is not conducive to improving the seedling picking speed.

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