US 11,738,633 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 Jul. 28, 2022, as Appl. No. 17/875,584.
Claims priority of application No. 10 2021 208 555.5 (DE), filed on Aug. 6, 2021.
Prior Publication US 2023/0037558 A1, Feb. 9, 2023
Int. Cl. B60K 6/365 (2007.10); B60K 6/547 (2007.10); B60K 6/48 (2007.10)
CPC B60K 6/365 (2013.01) [B60K 6/48 (2013.01); B60K 6/547 (2013.01); B60K 2006/4825 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A powertrain (2) of an at least partially electrically driven vehicle (1), comprising:
a gear unit (3) including:
a stepped planetary gearset (4);
a first gear shifting element (5); and
a second gear shifting element (6), and
an electric machine (11) and a differential (16) configured to drivingly connect the gear unit (3) to two driven shafts (18a, 18b) arranged coaxial to an output axis (17),
wherein the stepped planetary gearset (4) has a first sun gear (7a), a second sun gear (7b), a first ring gear (8) and a plurality of stepped planet gears (10) rotatably mounted at a first planet carrier (9),
wherein the first ring gear (8) is connected to an output shaft (12) of the gear unit (3) so as to be fixed with respect to rotation relative to it,
wherein the first planet carrier (9) is connected to a housing (13) so as to be fixed with respect to rotation relative to it, wherein the first gear shifting element (5) is configured to drivingly connect the second sun gear (7b) to the electric machine (11) in a closed state, wherein the second gear shifting element (6) is configured to drivingly connect the first sun gear (7a) to the electric machine (11) in a closed state, and wherein one of the first and second gear shifting elements (5, 6) is in the closed state for driving the output shaft (12) in rotation,
wherein the electric machine (11), the stepped planetary gearset (4), the gear shifting elements (5, 6) and the differential (1) are arranged coaxially to each other, and
wherein the differential (16) is configured as an integral differential (25) which has a second planetary gearset (26) and a third planetary gearset (27), wherein each planetary gearset (26, 27) is drivingly connected to a respective driven shaft (18a, 18b), wherein a first output torque is transmittable to the first driven shaft (18a) by the second planetary gearset (26), and wherein a supporting torque of the second planetary gearset (26) is convertible in the third planetary gearset (27) in such a way that a second output torque corresponding to the first output torque is transmittable to the second driven shaft (18b).