Abstract
A novel planetary gear train (PGT) as a mechanical continuous varying gear ratio transmission is introduced and tested in this paper. The novel PGT has a novel shaft which connects planet gear rotation axis and revolution axis on it by universal joint.Although PGT has been using in many kinds machines, noise and vibration problem is still critical and it is yet to be done, especially in advanced transmission such as Toyota hybrid system and geared turbo fan engine. The new PGT can reduce meshing frequency less than one third compared to ordinary 2K-H PGTin the same gear ratio and the noise level in the new PGT is also less than that of 2K-H PGT. Furthermore, the new PGT can provide wider gear ratio than 2K-H PGT in the same meshing frequency level. Although it can achieve development goals, it also has several serious problems due to tilting axis. Problems and solutions for them are discussed in the last paper of this paper, and further PGT is introduced.
