| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a combined planetary gear drive apparatus which can prevent deterioration of fuel consumption by an increase in an agitation loss of oil. <P>SOLUTION: The combined planetary gear drive apparatus 3 includes a first planetary gear drive apparatus 11 having a sun gear S1, a pinion gear P1 and a ring gear R1, and a second planetary gear drive apparatus 12 having a sun gear S2, a pinion gear P2 and a ring gear R2 provided in parallel on the same axis of the sun gear S1, and a counter drive gear 13 which is integrally formed so that the ring gear R1 and the ring gear R2 surround the pinion gear P1 and the pinion gear P2. In this case, a communication hole 13c is provided on the counter drive gear 13. The communication hole 13c communicates a close space A1 which is divided and formed by the first planetary gear drive apparatus 11 and the second planetary gear drive apparatus 12, and an external space A2 outside an integral type outer ring member. <P>COPYRIGHT: (C)2009,JPO&INPIT |
