US 12,449,027 B2
Transmission for E-axle
Peter Ziemer, Bad Woerishofen (DE); Bernard Hunold, Friedrichshafen (DE); Eckhardt Lübke, Friedrichshafen (DE); Thomas Riedisser, Sigmarszell (DE); Thomas Schneider, Langenargen (DE); Martin Brehmer, Tettnang (DE); Thomas Martin, Weissensberg (DE); Michael Wechs, Weißensberg (DE); and Fabian Kutter, Kressbronn (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on Mar. 30, 2023, as Appl. No. 18/192,930.
Claims priority of application No. 10 2022 203 203.9 (DE), filed on Mar. 31, 2022.
Prior Publication US 2023/0313871 A1, Oct. 5, 2023
Int. Cl. B60K 1/02 (2006.01); B60K 1/00 (2006.01); B60K 6/365 (2007.10); B60K 6/442 (2007.10); B60K 6/52 (2007.10); B60K 6/547 (2007.10); F16H 3/62 (2006.01); F16H 37/08 (2006.01); F16H 61/04 (2006.01)
CPC F16H 37/082 (2013.01) [B60K 1/00 (2013.01); B60K 6/365 (2013.01); B60K 6/442 (2013.01); B60K 6/52 (2013.01); B60K 6/547 (2013.01); F16H 61/0403 (2013.01); B60K 2001/001 (2013.01); B60Y 2200/92 (2013.01); F16H 2061/0422 (2013.01); F16H 2200/0021 (2013.01); F16H 2200/0039 (2013.01); F16H 2200/2007 (2013.01); F16H 2200/2038 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric transmission (16) for a motor vehicle drive train (12) of a motor vehicle (10), comprising:
a transmission input shaft (24) configured for operatively connecting the electric transmission to an electric prime mover (14) of the motor vehicle;
a reduction gear (26) configured for reducing a rotational speed of the electric prime mover;
a transmission (28) configured for establishing gear steps, the transmission (28) comprising a first planetary gear set (RS1) and a second planetary gear set (RS2);
a first output shaft (34) and a second output shaft (36) configured for transmitting drive power from the electric transmission; and
a plurality of shift elements (B, C, D) configured for engaging the gear steps,
wherein a planet carrier of the first planetary gear set is drivingly connected to a planet carrier of the second planetary gear set,
wherein a sun gear of the first planetary gear set is drivingly connected to a ring gear of the second planetary gear set, and
wherein:
the shift elements (B, C, D) comprise a first brake (C), a second brake (D), and a clutch (B), an uncoupled sun gear of the transmission (28) connectable to the input shaft by the clutch (B) and rotationally fixable by the first brake (C), an uncoupled ring gear of the transmission (28) rotationally fixable by the second brake (D); or
the shift elements (B, C, D) comprise a first clutch (C), a brake (D), and a second clutch (B), a free shaft (40) connectable to an uncoupled ring gear of the transmission (28) by the first clutch (C), the free shaft connectable to an uncoupled sun gear of the transmission (28) by the second clutch (B), the free shaft rotationally fixable by the brake (D); or
the shift elements (B, C, D) comprise a first brake and a second brake, an uncoupled ring gear rotationally fixable by the first brake, an uncoupled sun gear rotationally fixable by the second brake.