| 摘要 |
A vehicular reduction unit is provided with a planetary gear mechanism including a sun gear, a stepped pinion in which a first gear engaged with the sun gear and a second gear having fewer teeth than the first gear are connected on the same shaft, a first ring gear engaged with the first gear, a second ring gear engaged with the second gear and a carrier for outputting orbital motion of the stepped pinion, a case for housing the planetary gear mechanism, a first brake and a second brake. Rotation of the carrier is output when either one of the first brake and the second brake is in an engaged state. |
