| 摘要 |
A compact five-speed transmission planetary gear train includes a first, second, third, fourth and fifth planetary gear sets between an input and an output as well as first, second, third and fourth brakes and first and second clutches. The first, second, third and fourth brakes and first and second clutches are selectively actuatable to provide five different forward speeds and a plurality of different reverse speeds between the input and the output. |
| 主权项 |
1. A machine power transmission comprising:
a planetary gear train having only five planetary gear sets including a first planetary gear set having a first sun gear, first ring gear, and first carrier, a second planetary gear set having a second sun gear, second ring gear, and second carrier, a third planetary gear set having a third sun gear, third ring gear, and third carrier, a fourth planetary gear set having a fourth sun gear, fourth ring gear, and fourth carrier, and a fifth planetary gear set having a fifth sun gear, fifth ring gear, and fifth carrier; an input to the planetary gear train and an output from the planetary gear train; and a first brake, second brake, third brake, fourth brake, first clutch and second clutch associated with the planetary gear train, the first brake, second brake, third brake, fourth brake, first clutch and second clutch being linked to the planetary gear train such that selective actuation of one or more of the first brake, second brake, third brake, fourth brake, first clutch and second clutch provides five forward speeds and four or more reverse speeds, the first brake being positioned to brake the first carrier, the second brake being positioned to brake the second ring gear, the third brake being positioned to brake the fifth ring gear, the fourth brake being positioned to brake the fifth sun gear, the first clutch being positioned to tie the fourth ring gear to the fourth sun gear and fifth sun gear, and the second clutch being positioned to tie the fourth ring gear to the fifth carrier and third ring gear. |
