Optimization Design And Test Of Transplanting Mechanism Based On Clipping Rice Plug-Seedling

Transplanting mechanism is the core work part of high speed transplanting of rice bowl seedlings,which directly affects the transplanting efficiency and the quality of transplanting.Based on the analysis of rice seedling transplanting mechanism at the present stage,it is found that the transplanting mechanism based on seedling clamping type(transplanting is carried out through two metal sheets picking up the seedling stalk.)is the most widely used transplanting plant.But the problems existing in the transplanting mechanism of rice pot-seedling were found through a large number of field transplanting tests,such as the problem that failure to pick-up seedlings due to slipping when pickling claw sticking with soil,the problem that the uprightness of rice pot-seedling were affected because push seedling rod couldn't pushed pot-seedling sufficiently.A new type of rotary rice plug seedling pick-up mechanism of basing on clipping rice plug-seedling has been proposed for the above problems.These problems could be effectively resolved by this transplanting mechanism basing on clipping rice plug-seedling.Therefore,rice pot-seedling transplanting efficiency has been greatly improved.In this paper,the optimization design of rice pot-seedling transplanting mechanism and a series of related experiment studies were completed.The main research contents are as follows:1)The scheme of transplanting mechanism basing on clipping rice plug-seeding is determined on the basis of summarizing and analyzing the research on the rice seedling transplanting mechanism at the present stage.The work principle and structure of this transplanting mechanism was introduced,and its kinematics mathematical model was set up.2)Parameter optimization software of the mechanism was developed independently based on the visualized platform of Visual Basic.And the influence of parameters of seedling emergence on the trajectory of the transplanting arm and the attitude of the transplanting arm was analyzed by using optimization software By using this self-developed software,a set of parameters meeting the requirements of transplanting trajectory and posture was obtained.3)Basing on the optimized parameters of the transplanting mechanism,designing the overall structure and transplanting mechanism is divided into two parts: the planetary gear train and the transplanting arm,which mainly include the design of the transplanting claw,the cam contour and the elimination of the backlash device.4)Using SolidWorks2012 software for automatic transplanting mechanism overall three-dimensional modeling and virtual assembly,then assembly model was simplified into ADAMS virtual simulation software of kinematics simulation,carry out the virtual motion simulation test of transplanting mechanism.The coincident results of the contrastive theoretical design indicates that the result of the optimal design of the mechanism is correct.5)Physical prototype was manufactured to be installed on the test bench for high-speed photography kinematics test.Through this test,transplanting trajectory was obtained and compared with the theoretical trajectory,it is proved once again that the design of the mechanism is correct.6)To inprove the design for the rice pot-seedling transplanting test bench,and build the test bench to meet the needs of the transplanting mechanism.Then,carry out the seedling pick-up tests of transplanting mechanism.Due to the lack of self raising seedlings,the status of seedlings did not meet the ideal requirements,and had a great negative effect on transplanting experiment.But it was observed that successful transplanting test proved that the design effect of the transplanting mechanism is reasonable.