US 12,392,394 B2
Planetary gearbox with thrust washer for two ring gears, axial ring gear support, thrust washer for a ring gear, and electric vehicle drive train with axially supported ring gears
Johann Averichev, Nuremberg (DE); Sarah Sponsel, Aurachtal (DE); and Peter Welker, Herzogenaurach (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/717,129
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Nov. 10, 2022, PCT No. PCT/DE2022/100833
§ 371(c)(1), (2) Date Jun. 6, 2024,
PCT Pub. No. WO2023/104233, PCT Pub. Date Jun. 15, 2023.
Claims priority of application No. 102021132457.2 (DE), filed on Dec. 9, 2021.
Prior Publication US 2025/0035191 A1, Jan. 30, 2025
Int. Cl. F16H 57/08 (2006.01); F16C 17/04 (2006.01); F16H 1/28 (2006.01); F16H 57/04 (2010.01)
CPC F16H 1/28 (2013.01) [F16C 17/04 (2013.01); F16H 57/043 (2013.01); F16H 57/0486 (2013.01); F16C 2361/61 (2013.01); F16H 2057/085 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A planetary gearbox, comprising:
first and second ring gears which are arranged in different planes;
a planet gear set, the first ring gear and the second ring gear are designed to mesh, during operation, with at least one planet gear of the planet gear set;
a thrust washer arranged axially between the first and second ring gears, a first contact area on a first end face of the thrust washer is configured for making contact with the first ring gear and a second contact area on a second end face of the thrust washer is configured for making contact with the second ring gear;
the first ring gear has a first outer diameter that is smaller than a second outer diameter of the second ring gear; and
the thrust washer has a first bend and a second bend, such that the first contact area adjoins a radially inner edge on a first axial side of the thrust washer and the second contact area adjoins a radially outer edge on a second axial side of the thrust washer.