Mechanism Design And Motion Simulation Of Vegetable Transplanter With Planetary Bevel Gear Train

China is a large vegetable production country, the area and yield of vegetable planting rank first in the world. Vegetable production is labor-intensive industries, which transplanting is an important part in the process of vegetable production, but the characteristic of the traditional way of transplanting for artificial planting operation is low degree of automation, low efficiency of planting, large amount of labor. In order to meet the modern agriculture high speed automatic transplanting requirements, reduce artificial consumption, improve the quality of the transplanting and work efficiency, this paper analyzed the domestic and foreign vegetables transplanting machine research status and existing planting structure. According to the "zero speed for seedling " principle and meet the planting frequency90～120plants/min planting requirements, this paper completed the planting design and selection. Through the virtual prototype simulation analysis, this research obtained the optimal parameters of the planting trajectory and performance. The paper made the following results:1. put forward two kinds of vegetables seedling planting automotive mechanism (vegetables seedling planetary gear train planting, vegetables seedling planetary bevel gear train planting). Considering the characteristics of the two kinds of planting and planting operation stability requirements, optimized out of the vegetables seedling planetary bevel gear train planting as vegetables seedling planting automation design institutions.2. Taking the vegetables seedling planetary bevel gear train planting apparatus as the research object. Built a planting trajectory equation and determined the planting of the inner link between basic parameters.3. Taking the duckbill clip apparatus as the research object. Designed a cam and pressure rod drive mechanism as the planting of movable mechanism. Determined the cam and the motion law of follower curve equation. Set up kinematics equation of the open mechanism. Deduced the cam push process and duckbill clip opening range, the relationship between planting and open mechanism.4. Established the planting virtual prototype and realized the virtual prototype of the dynamic simulation. The simulation results show that:during2second planting period, tomato seedling separated from duckbill clip in moment of1.12second, completely separated from duckbill clip in moment of1.33second. Duckbill clip biggest movable range was60.3mm and single duckbill clip biggest opening Angle is10.3°. Front and back planting duckbill clip opening synchronism was consistent. To meet the planting frequency90～120plants/min planting requirements, the characteristic parameter λ>1is key to guarantee the quality of the planting plant, the optimal characteristic parameter λ, was1.26, plant spacing in the rows range was200～265mm.