Design And Research On Tobacco Seedling Pick-up Mechanism With Sector Gear

With the continuous improvement of scientific and technological level and the continuous application of new technology,pot seedling transplanting, has now become a mainstream way of planting crops.Applicable crops include rice,corn,rapeseed, cotton,tobacco seedlings,etc.But the slow development of automatic transplanting machine become one of the bottleneck of the transplanting technology of large-scale application. Automatic transplanting machine mainly include the establishment of seedlings and planting of two parts.Taking miao mechanism, in particular, is the key to automatic transplanting machine parts.Fully automatic transplanting machine has to save labor, improve the efficiency of planting and expand the scale of production, etc. Especially in the tobacco growing industry has been widely used. But the current tobacco transplanting machine mainly by artificial seedlings,automatic transplanting to give priority to.Therefore, to design a small, convenient taking seedling mechanism with tobacco transplanting machine cooperate with each other,for the development of tobacco transplanting machine, improving economic efficiency of drawing is of great significance.This article research object is the key parts of automatic tobacco transplanting machine and seedling mechanism.Through to the fan-shaped gear type take miao CAM design, to determine the trajectories of taking seedling mechanism.Combining with the characteristics of tobacco seedlings growth and specific BoPan size to determine the seedling mechanism structure parameters.Using Pro/E software for the virtual prototype simulation design of mechanism motion simulation, and complete the design and manufacture of a prototype.The use of ADAMS software prototype for dynamic design and analysis, thus to optimize the structure parameters.Mechanical characteristics analysis of tobacco pot seedling,Combined with the structure and material of seedling clip,determine the optimal miao, miao zhang and Angle Angle, shape into depth and miao miao. For the most suitable blade clip is18°,Miao clip shape double-sided clip-on.The detaching force minimum for and less damage on the tobacco seedlings. Institutions according to the tobacco pot seedling seedling cavity size and detaching mechanical characteristics analysis,combined with the characteristics of the fan-shaped gear type take seedlings,taking seedling mechanism of trajectory design.A complete set of institutions by the sector gear, grooved CAM, retractable blade clip, housing and stop.The agency to complete the tobacco pot seedling clip,transporting, miao, no-load four step process.Establishing mathematical model of the test prototype,and carries on the dynamic analysis. Optimize the institutions,to avoid excessive movement the pressure Angle of CAM and telescopic seedlings have great stress concentration phenomenon.Find the grooved CAM design and body length and seedling clip length is the main design parameters affecting the take effect.After the prototype for the optimization design, the multi-target orthogonal experiment.The test results show that the factors affecting the effects of take hello miao level combination is:The factors affecting the effects of take hello miao level for optimal combination is A2B2C2D1, input shaft speed18r/min, installation Angle for75°, for the seedlings into depth34mm, water content is22%. When taking seedling mechanism under the condition of the running, a whole set of institutions operates smoothly, take miao success rate is higher, and the injury rate is small.