# US 12,191,716 B2 · Rotor of rotating electric machine and rotating electric machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,716 B2 - Document ID: US12191716B2 - Status: Granted - Kind: B2 - Application number: 18/011,652 - Filed: 2020-08-20 - Published: 2023-08-17 - Granted: 2025-01-07 - Earliest claimed: 2020-08-20 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Junya Suzuki; Mitoru Yabe; Hideya Nishikawa; Masafumi Okazaki - Web page: https://patentgrep.com/patent/US12191716B2 ## CPC - H02K 1/28: Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures - H02K 1/278: Surface mounted magnets; Inset magnets - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract A base portion of a magnet holder attached to a rotor core of a rotor has a press-fit pin press-fitted into a press-fit hole provided at an end surface of the rotor core. An arm portion of the magnet holder has a holder rib which protrudes inward in the radial direction of an output shaft and of which one end surface in the circumferential direction serves as a pressing surface, and a come-off prevention protrusion inserted into an insertion groove provided at an outer circumferential surface of the rotor core. Magnets are located between the rotor core and the magnet holders, one end surface in the circumferential direction of each magnet contacts with the pressing surface, and another end surface contacts with a core rib protruding from the rotor core. ## Claims ### Claim 1 A rotor of rotating electric machine, comprising: a rotor core fixed to an output shaft; a plurality of magnets arranged on an outer circumference of the rotor core along a circumferential direction of the output shaft; and a plurality of magnet holders each having an arm portion extending along an axial direction of the output shaft and a base portion retaining the arm portion, wherein the base portion has a press-fit pin press-fitted into a press-fit hole provided at an end surface of the rotor core, the arm portion has a holder rib which protrudes inward in a radial direction of the output shaft and of which one end surface in the circumferential direction serves as a pressing surface, and a protrusion inserted into an insertion groove provided at an outer circumferential surface of the rotor core, and the magnets are located between the rotor core and the magnet holders, one end surface in the circumferential direction of each magnet contacts with the pressing surface, and another end surface in the circumferential direction of each magnet contacts with a core rib protruding from the rotor core. ### Claim 2 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein a cutout having a predetermined length is provided to the holder rib on a side where the base portion is present. ### Claim 3 (depends on 2) The rotor of rotating electric machine according to claim 2, wherein at the outer circumferential surface of the rotor core, a lock groove to which the protrusion is fitted is provided adjacently to the insertion groove in the axial direction. ### Claim 4 (depends on 3) The rotor of rotating electric machine according to claim 3, wherein the base portion has an output-shaft-direction retaining portion extending in the circumferential direction and retaining each magnet in the axial direction. ### Claim 5 (depends on 3) The rotor of rotating electric machine according to claim 3, wherein the arm portion has an output-shaft-direction retaining portion extending in the circumferential direction from an end on a side opposite to the base portion side and retaining each magnet in the axial direction. ### Claim 6 (depends on 3) The rotor of rotating electric machine according to claim 3, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 7 (depends on 2) The rotor of rotating electric machine according to claim 2, wherein the base portion has an output-shaft-direction retaining portion extending in the circumferential direction and retaining each magnet in the axial direction. ### Claim 8 (depends on 2) The rotor of rotating electric machine according to claim 2, wherein the arm portion has an output-shaft-direction retaining portion extending in the circumferential direction from an end on a side opposite to the base portion side and retaining each magnet in the axial direction. ### Claim 9 (depends on 2) The rotor of rotating electric machine according to claim 2, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 10 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein at the outer circumferential surface of the rotor core, a lock groove to which the protrusion is fitted is provided adjacently to the insertion groove in the axial direction. ### Claim 11 (depends on 10) The rotor of rotating electric machine according to claim 10, wherein the base portion has an output-shaft-direction retaining portion extending in the circumferential direction and retaining each magnet in the axial direction. ### Claim 12 (depends on 10) The rotor of rotating electric machine according to claim 10, wherein the arm portion has an output-shaft-direction retaining portion extending in the circumferential direction from an end on a side opposite to the base portion side and retaining each magnet in the axial direction. ### Claim 13 (depends on 10) The rotor of rotating electric machine according to claim 10, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 14 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein the base portion has an output-shaft-direction retaining portion extending in the circumferential direction and retaining each magnet in the axial direction. ### Claim 15 (depends on 14) The rotor of rotating electric machine according to claim 14, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 16 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein the arm portion has an output-shaft-direction retaining portion extending in the circumferential direction from an end on a side opposite to the base portion side and retaining each magnet in the axial direction. ### Claim 17 (depends on 16) The rotor of rotating electric machine according to claim 16, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 18 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein a plurality of the protrusions are provided along the axial direction. ### Claim 19 (depends on 1) The rotor of rotating electric machine according to claim 1, wherein a plurality of the rotor cores are arranged along the axial direction, and the respective rotor cores are shifted from each other by a predetermined angle in the circumferential direction. ### Claim 20 (depends on 1) A rotating electric machine comprising the rotor of rotating electric machine according to claim 1.