Design And Test Of The Automatic Conveying System For The Plug Seedling Transplanter

In recent years,with the adjustment of agricultural structure and the improvement of living standards,people’s demand for vegetables is increasing day by day.At present,most of the transplanters on the market are semi-automatic transplanters,which only solve the problem of transplanting potted seedlings to the earth.However,the distribution and throwing of potted seedlings are still done manually.The artificial problem has not been solved completely,and the semi-automatic transplanter is limited by the frequency of manual seeding,so the overall planting efficiency has not reached the expectation.Therefore,the development of a new automatic transplanter is of great significance for the development of vegetable planting industry such as pepper.According to the technical requirements of vegetable transplanting,the common semi-automatic transplanter with duckbill planter in the market is selected,and an automatic conveying system is designed,which can not only be loaded on the existing semi-automatic transplanter,but also work in coordination with the duckbill planting mechanism,mainly including gear cam linkage type seedling taking mechanism and transverse feeding based on cylindrical cam with straight driven follower There are three parts: seedling mechanism and longitudinal seedling feeding mechanism based on cylindrical indexing cam.The system has the advantages of high efficiency,reasonable structure and good stability.The main contents of this paper are as follows:(1)This paper expounds the development status of automatic conveying of plug seedling transplanter at home and abroad,analyzes the working principle of several typical plug seedling transplanter automatic conveying,summarizes the overall functional requirements of the automatic conveying system,decomposes its action,and determines the design scheme of automatic conveying and picking up seedlings;selects the semi-automatic transplanter with duck beak planter as the core component,and Its working principle is briefly described.(2)The kinematics analysis of the seedling taking mechanism is carried out,and the trajectory equations of the process trajectory,return trajectory and theoretical contour curve ofthe cam groove are derived.The overall structure of the seedling taking mechanism is designed,and the specific structure of the core parts is designed;the profile equations of the cylindrical cam and the cylindrical indexing cam with the translating follower are established;the overall structure of the seedling feeding device is designed;the core parts such as seedling cup and cam connecting rod are designed;the geometric parameters and motion parameters of the cylindrical indexing cam are calculated and determined.(3)The three-dimensional model of the automatic conveying system is established by using UG and SolidWorks software.The kinematics simulation of the seedling taking mechanism and the seedling conveying mechanism is carried out in ADAMS simulation software,and the seedling taking trajectory diagram,transverse seedling conveying displacement diagram and longitudinal seedling conveying displacement diagram are obtained,which verifies the correctness of the theoretical design;the static force of the supporting sheet metal parts is carried out by ANSYS simulation software And modal analysis of the whole seedling delivery device.(4)According to the design scheme of the automatic conveying system of the plug seedling transplanter,the parts were processed and the prototype was assembled.Taking Pepper Plug Seedlings as the test object,the experiment of automatic conveying system for automatic seedling delivery and picking was completed,which verified the accuracy and efficiency of automatic conveying system in delivering and picking up seedlings.