Study on the variables in designing the internal parallel move gears transmission

The mechanism of internal parallel move gears transmission, classified as the transmission of planet gear with a small teeth difference, has been developed as a new type of mechanical transmission on the principle of parallelogram mechanism as well as on the theoretical basis of planetary gear train. This mechanism can be widely applied in many fields, such as vehicle engineering, mine and metallurgy, heavy equipment, traffic transportation, machine tool industry, crane transportation and military equipment, etc, superseding cylindrical gear transmission and worm gear transmission. So, there are good prospects for the development of internal parallel move gears transmission. However, the current design and seriation work has been done only through the simple analogy, lacking the reliable theory and practical applied datas because of its short history. Therefore, the study of the design variables is of great significance to the research and seriation of the internal parallel move gears transmission. This paper discusses the relationships of modification coefficient, meshing angle, contact ratio and the interference coefficient of teeth profile. According to the actual examples of the design of internal parallel move gears transmission, the paper describes their relationships by means of figures and function equations and offers some empirical parameters for the design of internal parallel move gears transmission for reference.