US 11,752,849 B2
Gear unit and powertrain for a vehicle
Michael Wechs, Weißensberg (DE); Fabian Kutter, Kressbronn (DE); Thomas Martin, Weissensberg (DE); and Oliver Schaudt, Cologne (DE)
Assigned to ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE)
Filed by ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE)
Filed on Aug. 2, 2022, as Appl. No. 17/879,173.
Claims priority of application No. 10 2021 208 564.4 (DE), filed on Aug. 6, 2021.
Prior Publication US 2023/0044964 A1, Feb. 9, 2023
Int. Cl. F16H 37/08 (2006.01); B60K 1/00 (2006.01)
CPC B60K 1/00 (2013.01) [F16H 37/082 (2013.01); B60K 2001/001 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A gear unit for a powertrain of an at least partially electrically driven vehicle, comprising:
a stepped planetary gearset, having:
a first sun gear configured to be drivingly connected to an electric machine;
a first ring gear;
a second ring gear; and
a plurality of stepped planet gears rotatably mounted at a first planet carrier;
a first gear shifting element configured to connect the second ring gear to an output shaft of the gear unit in a closed state to be fixed with respect to rotation relative to the output shaft; and
a second gear shifting element configured to connect the first ring gear to the output shaft of the gear unit in a closed to state so as to be fixed with respect to rotation relative to the output shaft;
wherein the first planet carrier is fixedly connected with respect to rotation to a housing;
wherein one of the first gear shifting element and the second gear shifting element is in the closed state for driving the output shaft in rotation;
a planetary gear assembly that is drivingly connected to the output shaft of the gear unit and has at least a first planetary gearset, wherein the first planetary gear set of the planetary gear assembly has a second sun gear that is fixed with respect to the housing, a third ring gear, and a plurality of planet gears rotatably mounted at a second planet carrier,
wherein the third ring gear is fixedly connected with respect to rotation to the output shaft of the gear unit.