# US 2016/0252136 A1 · Device for Transmitting a Torque in a Range Extender > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0252136 A1 - Document ID: US20160252136A1 - Status: Published application - Kind: A1 - Application number: 15/151,744 - Filed: 2016-05-11 - Published: 2016-09-01 - Earliest claimed: 2014-02-14 - Assignees: Bayerische Motoren Werke Aktiengesellschaft - Applicants: Bayerische Motoren Werke Aktiengesellschaft - Inventors: Hans HOHENNER; Stefan RUDERT; Daniel STOPPER; Ingo BEUCK - Web page: https://patentgrep.com/patent/US20160252136A1 ## CPC - F16D 1/02: for connecting two abutting shafts or the like - F16D 1/00: Couplings for rigidly connecting two coaxial shafts or other movable machine elements (attachment of wheels to axles for railway carriages B60B; for attachment of cranks to their shafts F16C3/10) - F16D 2300/06: Lubrication details not provided for in group F16D13/74 - F16D 2300/08: Details or arrangements of sealings not provided for in group F16D3/84 - Y10S 277/912: Spline connection - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A device for transmitting a torque between an internal combustion engine and a generator has a motor-side shaft, a generator-side shaft, a separate transmission element for transmitting the torque between the two shafts, and a seal device. The motor-side shaft and the generator-side shaft are situated in each case substantially coaxially with respect to one another and are in each case connected by way of a shaft-hub connection to the transmission element, wherein a lubricant chamber which is situated radially outside the transmission element and between the motor-side shaft and the generator-side shaft and which couples the two shaft-hub connections with regard to a flow of lubricant is sealed off with respect to the outside by the seal device. ## Claims ### Claim 1 A device for transmitting a torque between an internal combustion engine and a generator, the device comprising: a motor-side shaft; a generator-side shaft; a separate transmission element that transmits torque between the motor-side shaft and the generator-side shaft, wherein the motor-side shaft and the generator-side shaft are arranged substantially coaxially with respect to one another and are connected in each case via a shaft/hub connection to the separate transmission element; a lubricant chamber is formed radially outside the transmission element between the motor-side shaft and the generator-side shaft, the lubricant chat b coupling the two shaft/hub connections in terms of lubricant flow; and a seal device configured to externally seal-off the lubricant chamber. ### Claim 2 (depends on 1) The device according to claim 1, further comprising: at least one lubricant intake provided in one of the motor-side shaft and the generator-side shaft. ### Claim 3 (depends on 2) The device according to claim 2, wherein at least one lubricant intake is provided in the motor-side shaft. ### Claim 4 (depends on 1) The device according to claim 1, wherein the lubricant chamber is fluidically connected to a lubricant circuit of the internal combustion engine. ### Claim 5 (depends on 1) The device according to claim 1, wherein: the seal device has a seal element, at one axial end of the seal element, the seal element overlaps with a tubular seal extension on one of the motor-side shaft and the generator-sides shaft, and the one axial end of the seal element bears against the tubular seal extension. ### Claim 6 (depends on 5) The device according to claim 5, wherein: the axial end of the seal element has a conical seat surface that overlaps with the seal extension, and the seal extension has a complementary conical counter-surface that contacts the conical seal surface. ### Claim 7 (depends on 1) The device according to claim 1, wherein: at least one of the motor-side shaft and the generator-side shaft has an axially projecting tubular shell part that extends around the transmission element and delimits the lubricant chamber radially outwardly at least in portions. ### Claim 8 (depends on 5) The device according to claim 5, wherein: at least one of the motor-side shaft and the generator-side shaft has an axially projecting tubular shell part that extends around the transmission element and delimits the lubricant chamber radially outwardly at least in portions. ### Claim 9 (depends on 7) The device according to claim 7, wherein: the tubular shell part is configured integrally with the generator-side shaft, and the seal element bears against and is guided on a radially inner surface of the tubular shell part. ### Claim 10 (depends on 8) The device according to claim 8, wherein the tubular shell part and the tubular seal extension overlap one another. ### Claim 11 (depends on 1) The device according to claim 1, wherein the seal device comprises a seal element axially tensioned between the motor-side shaft and the generator-side shaft. ### Claim 12 (depends on 1) The device according to claim 1, wherein the seal device comprises a spring supported on one of the motor-side shaft and the generator-side shaft, the spring pressing a seal element against the other one of the motor-side shaft and the generator-side shaft. ### Claim 13 (depends on 5) The device according to claim 5, wherein: the seal device has a spring supported on e of the motor-side shaft and the generator-side shaft that does not have a tubular seal extension, and the spring is configured to press the seal element with a force against the tubular seal extension on the other one of the motor-side shaft and the generator-side shaft. ### Claim 14 (depends on 5) The device according to claim 5, wherein the seal element is configured as a sleeve or an O-ring. ### Claim 15 (depends on 1) The device according to claim 1, wherein: at least one of the motor-side shaft or the generator-side shaft is configured as a hollow shaft having a torque transmission profile, the at least one of the two shafts being connected in a positive-locking manner to a complementary profile on the transmission element. ### Claim 16 (depends on 15) The device according to claim 15, wherein the torque transmission profile is a toothed profile.