Patent ID: 9726259
Date: 2017-08-08
CPC Classifications: F16H

Claim:
1. A planetary gear type transmission comprising: an input shaft configured to rotate around a rotation axis; a first intermediate shaft configured to rotate around the rotation axis; a first planetary gear mechanism having a first sun gear, a first planetary gear, a first ring gear, and a first carrier configured to rotate integrally with the input shaft; a second planetary gear mechanism having a second sun gear configured to rotate integrally with the first ring gear, a second planetary gear, a second ring gear, and a second carrier; a third planetary gear mechanism having a third sun gear configured to rotate integrally with the first intermediate shaft, a third planetary gear, a third ring gear, and a third carrier configured to rotate integrally with the second ring gear; a fourth planetary gear mechanism having a fourth sun gear configured to rotate integrally with the first intermediate shaft, a fourth planetary gear, a fourth ring gear, and a fourth carrier configured to rotate integrally with the third ring gear and to output power; a first clutch configured to couple the first ring gear and the second sun gear to the first intermediate shaft; a second clutch configured to couple the first carrier to the second carrier; a third clutch configured to couple the second carrier to the first intermediate shaft; a first brake configured to brake rotation of the first sun gear; a second brake configured to brake rotation of the second ring gear and the third carrier; and a third brake configured to brake rotation of the fourth ring gear.