# US 12,113,399 B2 · Door drive with a small high-performance motor unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,399 B2 - Document ID: US12113399B2 - Status: Granted - Kind: B2 - Application number: 17/782,862 - Filed: 2020-12-03 - Published: 2023-01-19 - Granted: 2024-10-08 - Earliest claimed: 2019-12-09 - Assignees: Dormakaba Deutschland GmbH - Applicants: dormakaba Deutschland GmbH - Inventors: Dennis Bertels; Martin Wagner; Dietmar Finis - Web page: https://patentgrep.com/patent/US12113399B2 ## CPC - H02K 1/278: Surface mounted magnets; Inset magnets - E05F 15/603: using rotary electromotors - E05F 15/643: operated by flexible elongated pulling elements, e.g. belts, chains or cables (by flexible elongated push-pull mechanisms E05F15/635) - H02K 15/03: having permanent magnets - E05F 15/632: for horizontally-sliding wings - E05Y 2201/434: Electromotors; Details thereof - E05Y 2201/438: Rotors - E05Y 2201/46: Magnets - E05Y 2600/526: Gluing or cementing - E05Y 2900/132: Doors - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - E05F: DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING - E05Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF ## Abstract A door drive for arrangement on or in connection with a door system, whereby at least one leaf element of the door system is movable. The door drive includes a motor unit with a housing, in which a stator is stationarily received, and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft, wherein the output shaft can be brought into operative connection in a driving manner with the leaf element. The rotor includes a support body, on which receiving fields are formed, on which permanent magnets are adhered. ## Claims ### Claim 1 A door drive for arrangement on or in connection with a door system, whereby at least one leaf element of the door system is movable, including a motor unit with a housing, in which a stator is stationarily received, and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft, wherein the output shaft is configured to be brought into operative connection in a driving manner with the leaf element, wherein the rotor includes a support body, on which receiving fields are formed, on which permanent magnets are adhered, wherein the rotor has an axis of rotation, wherein separating webs are formed between the receiving fields, which form a part of the circumferential area and extend parallel to the axis of rotation, wherein the receiving fields have a longitudinal extension running parallel to the axis of rotation between the separating webs and over their longitudinal edge are formed with overlay strips laterally adjoining the separating webs. ### Claim 2 (depends on 1) The door drive according to claim 1, wherein the receiving fields have a depressed area between the overlay strips such that, when the permanent magnets are arranged on the receiving fields, a defined adhesive gap is formed for receiving adhesive. ### Claim 3 (depends on 1) The door drive according to claim 1, wherein, on the side facing away from the output shaft, the permanent magnets protrude beyond the support body. ### Claim 4 (depends on 1) The door drive according to claim 1, wherein, with regard to its circumferential cross-section, the support body has a T-shape and/or, with regard to its half-section, has an H-shape, whereby inner recesses are formed, into which bearing elements are introduced. ### Claim 5 (depends on 1) The door drive according to claim 1, wherein the output shaft is formed with a rotor receiving section, on which the support body fitted with the permanent magnets is attached and/or wherein the output shaft has a first bearing section and a second bearing section, on each of which one bearing element is received, wherein the rotor receiving section is formed between the bearing sections. ### Claim 6 (depends on 1) The door drive according to claim 1, wherein the support body is formed from a metallic sintered material or a casting material. ### Claim 7 (depends on 1) The door drive according to claim 1, wherein a film retaining body is attached on the support body fitted with the permanent magnets. ### Claim 8 (depends on 7) The door drive according to claim 7, wherein the film retaining body includes an insulating tube made of polyester film and configured to be shrink-fitted onto the support body fitted with the permanent magnets. ### Claim 9 (depends on 7) The door drive according to claim 7, wherein the film retaining body is formed from a winding body of a fibre glass film or a fibre glass fabric. ### Claim 10 (depends on 1) The door drive according to claim 1, wherein the output shaft extends in sections from an end face of the housing such that a belt pulley is attached on said section of the output shaft. ### Claim 11 (depends on 1) The door drive according to claim 1, wherein the adhesive for adhering the permanent magnets onto the support body of the rotor comprises acrylate adhesive and/or an anaerobic adhesive. ### Claim 12 (depends on 1) A door system with a door drive according to claim 1, including at least one connecting element for connecting to a leaf element and/or at least one leaf element, with which the door drive is operatively connected in a driving manner.