Multi-speed planetary transmission for a vehicle with at least one electric machine
AssigneeRobert Bosch GmbH
InventorsTobias Schlittenbauer, Ianislav Krastev, Wael Mohamed
Life of this patent
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Abstract
The invention relates to a multi-speed planetary transmission (10). The multi-speed planetary transmission (10) comprises a driveshaft (12), which comprises a sun gear (18) and a ring gear (19), and an output shaft (14), which comprises a planet carrier with at least one planet gear (30). The drive shaft (12) and the output shaft (14) can be connected together or separated from each other by means of a clutch (20). The multi-speed planetary transmission (10) has a freewheel (26), via which a shift is carried out between a first transmission ratio i_1 and a second transmission ratio i_2 under a load using the clutch (20).
Claims12
A multi-speed planetary transmission (10) with a drive shaft (12) with a sun gear (18) and a ring gear (19) and an output shaft (14) with a planetary gear carrier which comprises at least one planetary gear (30), wherein the drive shaft (12) and the output shaft (14) are configured be connected to each other and disconnected from each other by a clutch (20), characterized in that the multi-speed planetary transmission (10) has a freewheel (26) via which power shifting between a first gear ratio i_1 and a second gear ratio i_2 by the clutch (20) is achieved, and
- wherein the multi-speed planetary transmission (10) further comprises a locking device (28) configured to selectively immobilize the freewheel (26),
- wherein a reverse gear is achieved by driving an electric machine (40) connected to the drive shaft (10) in a reverse direction while the clutch (20) is open and while the freewheel (26) is blocked by the locking device (28), and
- wherein a parking brake function is implemented by closing the clutch (20) and blocking the freewheel (26) with the locking device (28).
Dependencies are inferred from the claim text.