| The research on the agricultural machines which applied in the areas of hillside has become one of the significant point in the field of the Chinese Agricultural Engineering. The hillside crawler tractor should not only have the basic characters of a general crawler tractor, but also good working abilities on slope. Along with the country pays more attention to agricultural mechanization development in hillside, the research on steering stability plays an irreplaceable role on improving the overall performance of the hillside crawler tractor.Hillside crawler tractor is a very complicated mechanical system, based on the analysis of present research situation of tractor’s stability; the classical mechanics analysis method and dynamic analysis method were used to research on the hillside crawler tractor in this dissertation:(1) Using classical mechanical theory to analysis the static stability under two cases: equipped with/unload agricultural implement. Getting the influencing factors of the tractor’s static stability, the influencing process and the influencing rules as well. The results indicated that the limit rolling angle of the tractor when going up and down the hill is 52.3°and 54.1° respectively;(2) The relationship among driving force, design parameters, ground parameters and slip rate are established in a special case of pressure distribution. Then get the relationship between the driving force, steering resistant torque and the tractor’s design parameters, et al;(3) The position of hillside crawler tractor on slope, the kinematics and dynamics equations in the process of steering was described, as well as the kinematics and dynamics equations in the process of steering. Based on these studies, considering slip rate and slide turn, minimum steering radius is calculated under different ground status and velocity. And the maximum steering base offset is 0.61 m and 0.79 m respectively, when the tractor is steering up and down the hill. |
PDF Full Text Request