Development Of The Split & Variable-Radius CVT And Finite Element Analysis On Its Structural Intensity

CVT transmission is the area of the pursuit of the ideals and goals, the practical use of the CVT transmission is also hot areas of research, mechanical CVT continuously variable transmission is the most important areas of the branch, from the principle of which is uniquely positioned . With ordinary mechanical transmission, a continuously variable mechanical constant power, high efficiency, high reliability advantages, it is also the largest study into the transmission technology. V-belt CVT has many advantages, such as simple structure, easy manufacturing, work stable and so on. So it has become one of mechanical CVT widely used with the economic benefits of large-scale in industry.Through the information collection and analysis about auto CVT technology, this dissertation carried out a new research about the split and variable-radius continuously variable transmission technology. With the split pulley structure, the split and variable-radius CVT change the overall pulley's working diameter by the pulley parts'radial expansion and contraction, in order to achieve the purpose for CVT. Compared with the traditional V-belt CVT, the split and variable-radius CVT eliminates the pressing force acting on the side of transmission belt, reduces the wear and hereby, extends the belt's life.This dissertation mainly carried out principle introduction, characteristic analysis, structure design and intensity analysis for the split and variable-radius CVT with two grades transmission. In the research, the principle and overall program structure ware introduced, and the movement character in transmission using split pulleys was analyzed. In the need of the structure design of CVT, the main working and structural parameters of CVT ware calculated, and the dimension of main components ware designed. And then, based on Pro/E, the dissertation built the 3-D models of CVT, assembled them, and generated the overall assembly of CVT in order to check the connectivity and interference among the components. At last, the dissertation analyzed the main power transmission process, and then carried out the static analysis and intensity calibration on the main drive components using ANSYS. The dissertation's research achieved the expected target, and laid the foundation for the further development of the split and variable-radius CVT.