Patent ID: 6641499
Filing Date: 2003-11-04
Classification: F16H

Abstract:
A planetary spur gear system for setting the drive ratio of a transmission, including;a first sun gear having external teeth and forming an output gear for supply of rotary power; a second sun gear having external teeth; a planet cage; a planet gear system supported in the planet cage and having a first planet gear, and a second planet gear pixel to the first planet gear; a transfer gear in mesh with the second planet gear, the first planet gear being in mesh with one of the first sun gear or the second sun gear and the transfer gear being in mesh with the other of the first sun gear or the second sun gear; one of the second sun gear and the planet cage forming a control that sets the drive ratio of the transmission, and the other of the second sun gear and the planet cage forming an input to the transmission, the first sun gear forming an output from the transmission; and control means for controlling the rotation of the second sun gear or the planet cage to thereby set the drive ratio of the transmission.