Configuration for Compact Five Speed 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 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.
Claims20
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 a plurality of reverse speeds of the transmission.
A planetary gear train comprising:
- first, second, third, fourth and fifth planetary gear sets between an input and an output;
- and
- first, second, third and fourth brakes and first and second clutches, the first, second, third and fourth brakes and first and second 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 five or fewer planetary gear sets, four or fewer brakes for braking one or more elements of the planetary gear sets, and two or fewer clutches.
Dependencies are inferred from the claim text.