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US 7,011,596 B2Granted
Transfer case
AssigneeGeneral Motors Corporation
InventorRaymond J. Haka
Life of this patent
Estimating the term…
Abstract
A compound planetary gear arrangement for a transfer case includes a ring gear in driving engagement with an output shaft. A sun gear and carrier are selectively alternatively connectable with a transmission housing (ground) through a clutch or selectively connectable with an input through a clutch. This compound planetary gear arrangement provides one direct and two underdrive ratios between the input and the output of the transfer case.
Claims10
A transfer case comprising:
- an input shaft and an output shaft;
- a compound planetary gear set including a ring gear, a carrier and a sun gear;
- said ring gear in driving engagement with the output shaft;
- and
- said sun gear and carrier being selectively alternatively connectable with ground through a first clutching arrangement, or selectively connectable with the input shaft through a second clutching arrangement;
- wherein said sun gear and said carrier are not simultaneously connectable with ground through said first clutching arrangement;
- wherein the first and second clutching arrangements are selectively engageable to provide one direct and two underdrive ratios between the input and the output shaft of the transfer case.
4 more elements
A transfer case comprising:
- an input shaft and an output shaft;
- a compound planetary gear set including a ring gear, a carrier and a sun gear;
- said ring gear in driving engagement with the output shaft;
- said sun gear and carrier being selectively alternatively connectable with ground through a first clutching arrangement, or selectively connectable with the input shaft through a second clutching arrangement;
- wherein said sun gear and said carrier are not simultaneously connectable with ground through said first clutching arrangement;
- wherein the first and second clutching arrangements are selectively engageable to provide one direct and two underdrive ratios between the input and the output shaft of the transfer case;
- and
- wherein said first and second clutching arrangements comprise dog clutches and synchronizers for non-dynamic shifting.
5 more elements
A transfer case comprising:
- an input shaft and an output shaft;
- a compound planetary gear set including a ring gear, a carrier and a sun gear;
- said ring gear in driving engagement with the output shaft;
- said sun gear and carrier being selectively alternatively connectable with ground through a first clutching arrangement, or selectively connectable with the input shaft through a second clutching arrangement;
- wherein the first and second clutching arrangements are selectively engageable to provide one direct and two underdrive ratios between the input and the output shaft of the transfer case;
- wherein said first clutching arrangement comprises a first one-way clutch and a first dog clutch connected in parallel between said sun gear and ground, and a second one-way clutch and a second dog clutch connected in parallel between said carrier and ground;
- and
- said second clutching arrangement comprises a primary clutch for connecting said sun gear with said input shaft, and a secondary clutch for connecting said carrier with said input shaft.
5 more elements
Dependencies are inferred from the claim text.