# US 2015/0145352 A1 · Electric motor and bearing arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0145352 A1 - Document ID: US20150145352A1 - Status: Published application - Kind: A1 - Application number: 14/403,669 - Filed: 2013-05-23 - Published: 2015-05-28 - Earliest claimed: 2012-05-25 - Assignees: Leantec Motor GmbH & Co.KG - Applicants: Leantec Motor GmbH & Co.KG - Inventors: Soeren Hein; Friedrich Boebel - Web page: https://patentgrep.com/patent/US20150145352A1 ## CPC - H02K 1/2796: where both axial sides of the rotor face a stator - F16C 19/06: with a single row or balls - H02K 1/04: characterised by the material used for insulating the magnetic circuit or parts thereof - H02K 1/30: using intermediate parts, e.g. spiders - H02K 7/08: Structural association with bearings - H02K 7/088: {radially supporting the rotor directly} - H02K 7/083: {radially supporting the rotary shaft at both ends of the rotor (H02K7/086, H02K7/09 take precedence)} - H02K 2201/03: Machines characterised by aspects of the air-gap between rotor and stator - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS ## Abstract An electric motor has a rotor that is rotatably arranged around a rotor shaft. The rotor is mounted by way of at least one outer bearing that is arranged at a radial distance from the rotor shaft. The rotor has an annular design and is connected to the rotor shaft by way of at least one flexible connecting element. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 An electrical machine, comprising: a rotor rotatably mounted for rotation around a rotor shaft; at least one outer bearing mounting said rotor at a radial distance from said rotor shaft; and said rotor shaft being connected to said rotor for transmitting rotational movements of said rotor to said rotor shaft; and a connection between said rotor and said rotor shaft enabling an axial relative movement between said rotor and said rotor shaft. ### Claim 17 (depends on 16) The electrical machine according to claim 16, wherein said rotor is an annular rotor and is connected to said rotor shaft by way of at least one flexible connecting element, and wherein said flexible connecting element is configured to permit one or more movements selected from the group consisting of axial relative movements, radial relative movements, and angular relative movements between respective geometric axes of said rotor and said rotor shaft. ### Claim 18 (depends on 17) The electrical machine according to claim 17, wherein said rotor and said flexible connecting element are integrally formed in one piece. ### Claim 19 (depends on 16) The electrical machine according to claim 16, wherein said flexible connecting element comprises an elastic disc. ### Claim 20 (depends on 19) The electrical machine according to claim 19, wherein said flexible elastic disc is a membrane or a plate spring. ### Claim 21 (depends on 16) The electrical machine according to claim 16, wherein said rotor and said rotor shaft are connected to one another with a positively interlocking connection. ### Claim 22 (depends on 16) The electrical machine according to claim 16, wherein said rotor has an internal toothing and said rotor shaft has an external toothing. ### Claim 23 (depends on 16) The electrical machine according to claim 16, wherein said rotor is a disc-shaped rotor. ### Claim 24 (depends on 16) The electrical machine according to claim 16, wherein said rotor is formed of a plastic material or of a composite material. ### Claim 25 (depends on 24) The electrical machine according to claim 24, wherein said rotor is formed of a fiber composite material. ### Claim 26 (depends on 16) The electrical machine according to claim 16, wherein said electrical machine is an axial flux machine. ### Claim 27 (depends on 16) The electrical machine according to claim 16, wherein said rotor comprises a multiplicity of permanent magnets. ### Claim 28 (depends on 16) The electrical machine according to claim 16, which comprises at least one shaft bearing for mounting said rotor shaft. ### Claim 29 (depends on 16) The electrical machine according to claim 16, wherein said outer bearing comprises rotatably mounted bodies. ### Claim 30 (depends on 29) The electrical machine according to claim 29, wherein said rotatably mounted bodies form a roller bearing or a ball bearing. ### Claim 31 (depends on 29) The electrical machine according to claim 29, wherein said rotatably mounted bodies are mounted with damped mounting. ### Claim 32 (depends on 29) The electrical machine according to claim 29, wherein said rotor is formed with a running surface of a material selected from the group consisting of hardened metal, ceramic, and glass, and wherein said rotatably mounted bodies are in contact with said running surface. ### Claim 33 (depends on 16) The electrical machine according to claim 16 configured as an electric motor. ### Claim 34 A bearing arrangement for a machine having a rotor shaft, a rotor rotatably mounted for rotation about the rotor shaft, the bearing arrangement comprising: at least one outer bearing mounting the rotor at a radial distance from the rotor shaft; a connection between the rotor and the rotor shaft configured to transfer a rotary movement of the rotor to the rotor shaft, said connection further enabling an axial relative movement between the rotor and the rotor shaft.