# US 12,119,709 B2 · Axial flux machine for an electrical processing device and electrical processing device with an axial flux machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,709 B2 - Document ID: US12119709B2 - Status: Granted - Kind: B2 - Application number: 17/754,577 - Filed: 2020-10-21 - Published: 2024-02-22 - Granted: 2024-10-15 - Earliest claimed: 2019-10-31 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Andreas Echle; Nejila Parspour - Web page: https://patentgrep.com/patent/US12119709B2 ## CPC - H02K 1/182: {to stators axially facing the rotor, i.e. with axial or conical air gap} - H02K 5/1732: {radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence)} - H02K 5/08: Insulating casings - H02K 5/161: {radially supporting the rotary shaft at both ends of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)} - H02K 7/083: {radially supporting the rotary shaft at both ends of the rotor (H02K7/086, H02K7/09 take precedence)} - H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) - H02K 5/20: with channels or ducts for flow of cooling medium - H02K 2201/03: Machines characterised by aspects of the air-gap between rotor and stator - H02K 2213/09: Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract An axial flux machine, in particular a single-sided axial flux motor, for an electrical machining device, includes a machine shaft, in particular a motor shaft, a disc-shaped stator, and a disc-shaped rotor which is arranged adjacent to the stator in the axial direction of the machine shaft. The stator is formed as a winding carrier for at least one stator winding and the rotor, which is connected to the machine shaft in a rotationally fixed manner, can rotationally moved relative to the stator. The axial flux machine further includes a housing for receiving the stator and the rotor. The housing is cylindrical, open on one side and formed with a substantially closed end face, and the housing fixes the stator in such a way that a defined air gap remains between the rotor and the stator. The axial flux machine can be arranged in an electrical processing device. ## Claims ### Claim 1 An axial flux machine for an electric machining device, comprising: a machine shaft; a disk-like stator including a winding carrier for at least one stator winding; a disk-like rotor arranged next to the stator in an axial direction of the machine shaft, the rotor connected to the machine shaft for conjoint rotation and configured to rotationally move relative to the stator; and a cylindrical housing in which the stator and the rotor are received, the housing open on one side, and formed with a substantially closed end side, wherein the housing fixes the stator such that a defined air gap remains between the rotor and the stator, and the housing has, on the open side, a plurality of cutouts and tabs alternately distributed around the circumference of the housing and configured such that within each of the plurality of cutouts one of a plurality of protrusions of the stator is received such that each of the plurality of protrusions is positioned between respective adjacent tabs of the plurality of tabs. ### Claim 2 (depends on 1) The axial flux as claimed in claim 1, further comprising a floating bearing, which is configured to movably support the machine shaft, fixed in the substantially closed end side of the housing. ### Claim 3 (depends on 1) The axial flux machine as claimed in claim 1, wherein the housing consists of a plastic (PA66). ### Claim 4 (depends on 1) The axial flux machine as claimed in claim 1, further comprising a fixed bearing, which is configured to support the machine shaft in an immovable manner, integrated in a cover for the open side of the housing. ### Claim 5 (depends on 4) The axial flux machine as claimed in claim 4, wherein the cover consists of a plastic (PA66). ### Claim 6 (depends on 1) The axial flux machine as claimed in claim 1, wherein each tab defines at least one bore configured for fixing the stator via corresponding fastening elements. ### Claim 7 (depends on 6) The axial flux machine as claimed in claim 6, wherein the corresponding fastening elements are screws. ### Claim 8 (depends on 6) The axial flux machine as claimed in claim 6, wherein the plurality of radially and/or axially acting ventilation openings are ventilation outlet openings. ### Claim 9 (depends on 1) The axial flux machine as claimed in claim 1, wherein the housing defines, on the substantially closed end side, a plurality of radially and/or axially acting ventilation openings distributed around the circumference of the housing. ### Claim 10 (depends on 1) The axial flux machine as claimed in claim 1, wherein the housing has, approximately centrally between the substantially closed end side and the open side, a plurality of radially acting ventilation openings distributed around the circumference of the housing. ### Claim 11 (depends on 1) The axial flux machine as claimed in claim 1, wherein the axial flux machine is a single-sided axial flux motor. ### Claim 12 (depends on 1) The axial flux machine as claimed in claim 1, wherein the machine shaft is a motor shaft. ### Claim 13 An electric machining device comprising: an axial flux machine comprising: a machine shaft; a disk-like stator including a winding carrier for at least one stator winding; a disk-like rotor arranged next to the stator in an axial direction of the machine shaft, the rotor connected to the machine shaft for conjoint rotation and configured to rotationally move relative to the stator; and a cylindrical housing in which the stator and the rotor are received, the housing open on one side, and formed with a substantially closed end side, wherein the housing fixes the stator such that a defined air gap remains between the rotor and the stator, and the housing has, on the open side, a plurality of cutouts and tabs alternately distributed around the circumference of the housing and configured such that within each of the plurality of cutouts one of a plurality of protrusions of the stator is received such that each of the plurality of protrusions is positioned between respective adjacent tabs of the plurality of tabs. ### Claim 14 (depends on 13) The electric machining device as claimed in claim 13, wherein the electric machining device is an electric power tool. ### Claim 15 (depends on 10) The axial flux machine as claimed in claim 10, wherein the plurality of radially acting ventilation openings are ventilation inlet openings.