Effects of errors of elements on load distribution in planetary gears with various load equalizing mechanisms.

Abstract

Equations of the equilibrium of statical forces acting on elements of planetary gear drive are deduced. Then using the equations, effects on the load equalizing mechanism, run-out and attachment errors of elements and the number of planet gears on load distribution rates of planet gears are obtained, with the following conclusions : In the case of three planet gears, one element among a sun gear, an internal gear and a planet carrier should be movable. Whereas in cases where the number of planet gears is more than four, the planet gears should be movable. Each direction of the run-out error of the planet gear at the initial state should be in the radial direction to the center of the planet carrier. The circumferential position of the planet gear shaft as well as radial one should be composed with special care.