	US 11,746,852 B2
	Drive assembly for a two-wheeled vehicle
Franz-Josef Wetzel, Gernlinden (DE); Sascha Groetzki, Augsburg (DE); Lionel Mathern, Dachau (DE); Volker Weihnacht, Dresden (DE); and Andreas Leson, Dresden (DE)
Assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, Munich (DE); and FRAUNHOFER-GESELLSCHAFT ZUR FOERDERONG DER ANGEWANDTEN FORSCHUNG E.V, Munich (DE)
Appl. No. 16/639,177
Filed by BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT, Munich (DE); and Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V., Munich (DE)
PCT Filed Nov. 5, 2018, PCT No. PCT/EP2018/080163 § 371(c)(1), (2) Date Feb. 14, 2020, PCT Pub. No. WO2019/091913, PCT Pub. Date May 16, 2019.
Claims priority of application No. 10 2017 220 152.5 (DE), filed on Nov. 13, 2017.
Prior Publication US 2020/0232541 A1, Jul. 23, 2020
Int. Cl. F16G 13/06 (2006.01); B62M 9/00 (2006.01); C10M 107/38 (2006.01); F16H 7/06 (2006.01); C10N 40/04 (2006.01); C10N 50/08 (2006.01)

CPC F16G 13/06 (2013.01) [B62M 9/00 (2013.01); C10M 107/38 (2013.01); F16H 7/06 (2013.01); C10M 2213/0623 (2013.01); C10N 2040/04 (2013.01); C10N 2050/08 (2013.01)]

9 Claims

1. A drive assembly for a two-wheeled vehicle, in which a closed chain is guided around a drive pinion and a sprocket for the output and the chain is formed by pins, on each of which there is arranged a bushing which is rotatable about the center longitudinal axis of the pin, and a roller is provided on each bushing, which roller is arranged for rotation around the bushing, the pins are connected to each other at two opposite end faces by means of plates; wherein the outer surface of each of the bushings and of each of the rollers is coated with a coating of essentially pure ta-C and;

an Ra roughness of between 0.03 μm and 0.2 μm and/or an R_zroughness of between 0.3 μm and 2 μm is maintained at the surface of the coatings; the surfaces of the pinion and of the sprocket that are in contact with the rollers of the chain do not have a coating of diamond-like carbon; and the closed chain is not used in internal combustion engines.