Configuration for Compact Planetary Transmission
AssigneeCaterpillar Inc.
InventorsThomas Koch, Justin Floro, Michael Gross, Kevin Meyer, Kevin Knox, James Rice, James Elmer Winzeler, Peter Hodges, Perry Cruce
Life of this patent
Estimating the term…
Abstract
A compact five-speed transmission planetary hear train includes a first, second, third, and fourth planetary gear sets between an input and an output as well as first, second, and third brakes and first, second and third clutches. The first, second and third brakes and first, second and third clutches are selectively actuatable to provide five different forward speeds and a four different reverse speeds between the input and the output.
Claims20
A machine power transmission comprising:
- a planetary gear train having exactly four 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, and a fourth planetary gear set having a fourth sun gear, fourth ring gear, and fourth carrier;
- an input to the planetary gear train and an output from the planetary gear train;
- and
- a first brake, second brake, third brake, first clutch, second clutch and third clutch associated with the planetary gear train, the first brake, second brake, third brake, first clutch, second clutch and third clutch being linked to the planetary gear train such that selective actuation of one or more of the first brake, second brake, third brake, first clutch, second clutch and third clutch provides five forward speeds and a four reverse speeds of the transmission.
A planetary gear train comprising:
- first, second, third, and fourth planetary gear sets between an input and an output;
- and
- first, second, and third brakes and first, second and third clutches, the first, second, and third brakes and first, second and third clutches being selectively actuatable to provide five different forward speeds and four different reverse speeds between the input and the output.
A compact transmission providing five forward speeds and four reverse speeds, the compact transmission including only four planetary gear sets, three brakes for braking one or more elements of the planetary gear sets, and three clutches for interconnecting one or more elements of the planetary gear sets.
Dependencies are inferred from the claim text.