| With the implementation of the strategy of Crux, the mulberry sericulture farmers will be more and more, and thus the demand for mulberry growing. However, picking mulberry degree of automation is still relatively low and domestic mulberry picking basically mainly manual work. In view of this, mulberry picking machine technology behind of China,which we main stay in the manual picking mulberry situation. In order to reduce farmers labor intensity, a rocker-type mulberry leaves picking machine was designed, which automatic machines to replace manual picking mulberry.Therefore, the conducted research of mulberry field and understanding mulberry picking methods, and in the analysis of the domestic Mulberry technology on the basis of picking machines, which conditions must be needed. On the purpose of obtaining a cylindrical indexing cam specific motion parameters, the operational principle of device of mulberry leaves picking and intermittent slide switch positioning were be analysised.In addition to this, the machine of picking mulberry leabes about picking process also need to be knew. In this paper, a study from the following aspects:(1) To Mulberry research in orde to understand the Mulberry management, mulberry growth and mulberry farmers picking mulberry way. And in accordance with domestic and mulberry pickers picking mechanism, the development trend of mulberry picking machine and the work environment analysis to determine the mulberry picking tool is engaged stroke of 1200 mm, mulberry main stem height from the ground is 200 mm. Commonly used in mulberry planting mulberry ridge distance 80 cm, 40 cm spacing the way. Spring dynamometer and small blade to cut mulberry leaves petiole simple mechanical test to determine the mulberry leaf petiole sheath and mulberry Mo main shaft junction size of the force, the test results showed that the cutting force petiole focused on the scope of 2N-6N Room. Through these investigations and trials, provide the basis for the overall design of mulberry picking machine.(2) Connecting rod type mulberry leaf picking machine assembly structure has been designed, it contains transmission and the main working parts- walking devices, base unit, intermittent toggle positioning device, mulberry picking devices and other auxiliary organizations.And connecting rod length to crank length as design variables; the maximum distance slider and crank axis constraint; crank slider mechanism to increase the minimum transmission angle as the goal, the establishment of slider-crank mechanism optimization model; with Pro / E of movement optimization module is solved to obtain optimum design parameters: crank length is 547 mm, connecting rod length is 1275 mm, slider-crank mechanism to obtain the minimum transmission angle of 39.4 °, with the theoretical minimum transmission angle of the basic agreement, so picking mechanism optimum transmission performance. A picking cycle to coordinate research on exercise time matching mulberry picking device and intermittent toggle positioning device according to the optimization results to determine mulberry picking machine for 5.7s, 1.3s where mulberry struck time and positioning time of 4.4s.(3) Positioning means for intermittent toggle key parts of cylindrical indexing cam analysis and study, combined with the movement of mulberry picking devices and structural characteristics of cylindrical indexing cam, a cylindrical indexing cam is divided into divisions and the rest of the period. According to the calculation to determine the division of the angle of 820 degrees, stop on the corner of 2780. By analyzing the calculations to determine the structural parameters of cylindrical indexing cam and indexing plate, complete intermittent struck positioning device design. Turn exercise time that an intermittent positioning device and matching mulberry picking device coordination to protect the logistics flow, so mulberry picking can proceed smoothly. |
PDF Full Text Request