Rotor core, rotor assembly, and motor
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- WELLING WUHU MOTOR MFG
- Filing Date
- 2024-06-18
- Publication Date
- 2026-06-26
Smart Images
Figure 2026521133000001_ABST
Abstract
Claims
1. A rotor core comprising a plurality of core units arranged around the rotation axis of the rotor core, wherein a housing space is defined between each of two adjacent core units, the housing space is used to house permanent magnets, and one of the core units is designated as a first core unit, and in the circumferential direction of the rotation axis, the first core unit is separated from all the other core units. The first core unit includes a plurality of laminated sheets arranged in a stack along a direction parallel to the rotation axis, one of which is a first laminated sheet, and the first laminated sheet includes a first side and a second side arranged opposite each other in the circumferential direction of the rotation axis. The first side has a first projection at the end near the axis of rotation, the first projection includes a contact portion and a gap portion, the contact portion is used to contact the end of the permanent magnet near the axis of rotation, the gap portion is connected between the contact portion and the first side, and the gap portion is used together with the permanent magnet to define a first gap. Rotor core.
2. The first projection has a first wall surface and a second wall surface facing the end of the permanent magnet near the axis of rotation, the first wall surface is used to abut against the end of the permanent magnet near the axis of rotation, and the second wall surface and the end of the permanent magnet near the axis of rotation define the first gap. The third wall surface for contacting the first projection of the permanent magnet is parallel to the axis of rotation, and the maximum dimension H of the first wall surface from the third wall surface in the radial direction perpendicular to the axis of rotation is １ and the maximum dimension H from the third wall surface of the second wall surface ２ is 0 ≤ H １ <H ２ Satisfying The rotor core according to claim 1.
3. In the circumferential direction of the rotation axis, the contact portion is located at the end of the first projection that is away from the first side edge. The rotor core according to claim 1 or 2.
4. The first side has a second projection at the end away from the axis of rotation, and the second projection is used to contact the end of the permanent magnet away from the axis of rotation. A rotor core according to any one of claims 1 to 3.
5. The end of the second projection closest to the permanent magnet and the end of the permanent magnet away from the axis of rotation define a second gap between them. The rotor core according to claim 4.
6. One of the core units is a second core unit, and the second core unit is separated from all the other core units, and in the circumferential direction of the rotation axis, the first core unit and the second core unit are arranged adjacent to each other with a gap between them, and the second core unit includes a plurality of laminated sheets, one of the laminated sheets is a second laminated sheet, and the second laminated sheet has a third side facing the first side, In the circumferential direction of the rotation axis, the minimum dimension L from the third side of the second projection is ３ and the maximum dimension L from the third side of the first side ４ is 0.5 ≤ L ３ / L ４ < 0.95 The rotor core according to claim 4 or 5.
7. One of the core units is a second core unit, and the second core unit is separated from all the other core units, and the first core unit and the second core unit are arranged adjacent to each other with a gap in the circumferential direction of the rotation axis, and the second core unit includes a plurality of laminated sheets, one of the laminated sheets is a second laminated sheet, and each of the second laminated sheets has a third side facing the first side, In the circumferential direction of the rotation axis, the minimum dimension L from the third side of the first protrusion １ and the maximum dimension L from the third side of the first side ２ satisfy 0.3 ≤ L １ / L ２ < 0.95 A rotor core according to any one of claims 1 to 6.
8. At least one of the first sides has a first projection at the end closer to the axis of rotation and a second projection at the end further away from the axis of rotation, the second projection being used to contact the end of the permanent magnet further away from the axis of rotation. A rotor core according to any one of claims 1 to 7.
9. The total number of laminated sheets in the first core unit is M, and it contains N first laminated sheets, and M > 2N. A rotor core according to any one of claims 1 to 8.
10. In a direction parallel to the rotation axis, at least one of the two adjacent laminated sheets is the first laminated sheet. A rotor core according to any one of claims 1 to 9.
11. The rotor core has a first plane, the first plane is perpendicular to the axis of rotation, and each of the laminated sheets is arranged symmetrically with respect to the first plane, and has at least one of the first laminated sheets on each side of the first plane in a direction parallel to the axis of rotation. A rotor core according to any one of claims 1 to 10.
12. Each of the aforementioned core units is cut from one another, and each of the aforementioned core units is the same in shape and structure. A rotor core according to any one of claims 1 to 11.
13. A rotor core according to any one of claims 1 to 12, A plurality of permanent magnets provided within the aforementioned containment space, Rotor assembly.
14. The rotor assembly according to claim 13, A motor, including a stator assembly.