Abstract
In the design of a planetary gear system, the choice of the number of teeth for each gear in the system involves various conditions that need to be taken into consideration. Determination of the number of teeth that satisfies all the above conditions is difficult, and a great deal of trial and error is required to successfully obtain even one design plan. Formulae for these conditions have not been established for a 3K-type planetary gear system with a complex mechanism. In this study, a formula for equidistant arrangement of planetary gears and a formula for concentric arrangement of all component gears for a 3K-type planetary gear system were derived using a new method, and on the basis of these formulae, a system of automatic selection of the number of teeth was developed for 3K and 2K-H planetary gear systems. This automatic system was tested through extensive computation, and the results were checked by manual calculation. As a result, the validity of the selection data obtained by this system was verified. The system was thus confirmed to be practically applicable.
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