英文资料及其翻译.doc

无级变速传动 金属带 主 从动锥盘 Along with the development of economics, the increment of population, and the improvement of traffic conditions automotives have been used widely, its number increasing year after year. Then developing perfect vehicles transmission system is becoming more and more urgent. Compared with conventional multiratio gearbox, the metal V-belt continuously Variable Transmissions have attracted a great deal of interest because of their economy, drive performance and comfort. Now many big motor corporations all over the world are investing huge money to investigate them. In this thesis, its history, current status, and the dimension parameters and function of principal structures are described. Through the analysis of its working progress, the author explained the superiority and advantage of this device. For the metal V-belt CVT, the belt transmission device is the hardcore, and one of its key parts is the pulley. It affects the transmissionquality, the efficiency and the life and cost of the CVT. To straight generatrix pulleys, while the transmission ratio isnt one to one, the matal belt will retort, resulting in the declining of the belts life. In this thesis, the reason of retorting and the relation between the deflection and transmission ratio are analyzed. The author tesified that the pulleys genetrix shouldnt be straight if there is no deflection happening. The object of this thesis is to design the curve genetrix to meet requirements. Defining the mesh point between metal block and pulley as the initial point, the surface within the initial point as the inner prick, the surface outside the initial point as the outer one. Analyzing the relative movement between pulleys and metal blocks separately to acquire their onnection formula. Only when the numerical values meet this formula wont the metal V-belt deflect. From the connection formula between pulleys and metal blocks, we know the genetrix which meet the formula is not one and only. Considering the