US 12,228,196 B2
Electric drive system
Frank Steffens, Ostfildern (DE); Marc Stroelin, Neuhausen (DE); and Jens Luckmann, Winnenden (DE)
Assigned to Daimler Truck AG, Leinfelden-Echterdingen (DE)
Appl. No. 18/043,823
Filed by Daimler Truck AG, Leinfelden-Echterdingen (DE)
PCT Filed Aug. 12, 2021, PCT No. PCT/EP2021/072515
§ 371(c)(1), (2) Date Mar. 2, 2023,
PCT Pub. No. WO2022/048882, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 10 2020 005 394.7 (DE), filed on Sep. 3, 2020.
Prior Publication US 2024/0026960 A1, Jan. 25, 2024
Int. Cl. F16H 3/093 (2006.01); B60K 1/02 (2006.01); B60K 17/08 (2006.01); B60K 17/16 (2006.01); F16H 3/52 (2006.01); F16H 37/08 (2006.01)
CPC F16H 37/0806 (2013.01) [B60K 1/02 (2013.01); B60K 17/08 (2013.01); B60K 17/165 (2013.01); F16H 2200/0021 (2013.01); F16H 2200/0043 (2013.01); F16H 2200/2005 (2013.01); F16H 2200/2094 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A purely electric drive system (1), comprising:
a first electric engine (2);
a second electric engine (3);
a differential transmission (16);
a driven wheel (17); and
a group transmission (7) having a main group (6) and a range group (9), wherein the range group (9) has a planetary gear set (10), wherein a first input shaft (4) of the main group (6) is coupled with the first electric engine (2) such that torques starting from the first electric engine (2) are introducible into the group transmission (7) via the first input shaft (4), wherein a second input shaft (5) of the main group (6) is coupled with the second electric engine (3) such that torques starting from the second electric engine (3) are introducible into the group transmission (7) via the second input shaft (5), wherein an output shaft (8) of the main group (6) is permanently coupled with a first element (26) of the planetary gear set (10) such that it transfers torque, and wherein a second element (12) of the planetary gear set (10) is permanently coupled with an output drive shaft (13) of the group transmission (7) such that it transfers torque;
wherein with regard to a torque flow starting from the first electric engine (2) and the second electric engine (3) to the driven wheel (17), the first electric engine (2), the main group (6), the range group (9), a differential gear (15) and the wheel (17) are disposed one after the other in this order claimed;
wherein exactly two idler wheels (18, 19) comprising a first idler wheel (18) and a second idler wheel (19) are disposed coaxially to the first input shaft (4);
wherein exactly two further idler wheels (20, 21) comprising a third idler wheel (20) and a fourth idler wheel (21) are disposed coaxially to the second input shaft (5);
wherein the first input shaft (4) and second input shaft (5) are coupled with the output shaft (8) via exactly two fixed gears (22, 23) disposed coaxially to the output shaft (8), wherein a first fixed gear (22) of the two fixed gears (22, 23) is in permanent meshed engagement with the first idler wheel (18) and the third idler wheel (20), and wherein a second fixed gear (23) of the two fixed gears (22, 23) is in permanent meshed engagement with the second idler wheel (19) and the fourth idler wheel (21);
wherein a third fixed gear (24) is disposed coaxially to the output shaft (8) and permanently meshes with a fourth fixed gear (25) which is non-rotatably connected to the first element (26) of the planetary gear set (10);
wherein a gear wheel (14) non-rotatably connected to the output drive shaft (13) meshes with the differential gear (15) which is non-rotatably connected to a differential cage of the differential transmission (16);
wherein an axis of rotation of the first input shaft (4), an axis of rotation of the second input shaft (5), an axis of rotation of a sun shaft (11) of the planetary gear set (10) and an axis of rotation of the differential gear (15) are all disposed in parallel and axially offset from one another.