Rotor, rotating electric machine, method for manufacturing a rotor, parts, and method for manufacturing parts

Abstract

Provided is a rotor (2) that comprises: a rotor core (20), in which a rotating shaft (1) is disposed to serve as the rotational center for a rotary electrical machine (100); and a magnet (3) disposed in the rotor core (20). The rotor core (20) comprises: a press-fit hole (21) into which the rotating shaft (1) is inserted and fixed in the axial direction (Y); a through hole (6) that is formed at least at one location in the circumferential direction and that passes, in the axial direction (Y), between the press-fit hole (21) and an outer circumferential surface (22) of the rotor core (20); and a positioning hole portion (4), which is located in one part in the axial direction (Y) of the through hole (6) and which has a smaller diameter (W2) than the minimum diameter (W1) of the through hole (6).

Claims

1. A rotor core on which the rotating shaft that serves as the center of rotation of a rotating electric machine is installed, A rotor comprising a magnet installed on the rotor core, The rotor core has a press-fit hole for inserting and fixing the rotating shaft in the axial direction, Between the press-fit hole and the outer circumferential surface of the rotor core, there is a through-hole that penetrates axially and is formed at one or more locations in the circumferential direction, The magnet is not placed inside the through hole, and A rotor having a positioning portion in a part of the through hole in the axial direction, the positioning portion having a smaller diameter than the diameter of the other part of the through hole.

2. Multiple rotor cores are installed in the axial direction of the aforementioned rotating shaft. Each of the multiple rotor cores is offset by a predetermined phase angle and fixed to the rotation axis. The rotor according to claim 1, wherein the through holes of the multiple rotor cores are formed to communicate axially with each of the rotor cores in a skewed state.

3. The rotor according to claim 1 or claim 2, wherein the positioning portion is formed on both end faces in the axial direction of the rotor core.

4. The rotor according to claim 1 or 2, wherein the positioning portion is formed at the axial central position of the rotor core.

5. The rotor according to claim 1 or 2, wherein the positioning portion is formed at a position on either end face side in the axial direction of the rotor core.

6. The rotor according to claim 1 or 2, wherein the positioning portion is provided with a notch connected to the press-fit hole or the outer circumferential surface of the rotor core.

7. The positioning portion includes a notch that connects to the press-fit hole of the rotor core, The rotor according to claim 1 or claim 2, wherein the through hole is provided with a notch that connects to the press-fit hole of the rotor core.

8. The positioning portion includes a notch that connects to the outer circumferential surface of the rotor core, The rotor according to claim 1 or claim 2, wherein the through hole is provided with a notch that connects to the outer circumferential surface of the rotor core.

9. The rotor core is formed by stacking multiple core pieces in the axial direction. The rotor according to claim 1 or claim 2, wherein multiple core pieces are fixed together in the axial direction by a fixing portion.

10. The core pieces of the rotor core include multiple types, One type of core piece has a through hole that forms the through hole, The rotor according to claim 9, wherein the other core piece is provided with a positioning hole for forming the positioning portion.

11. The rotor core has a plurality of through holes spaced at predetermined intervals in the circumferential direction. One core piece has multiple through holes that form multiple through holes and positioning holes that form the positioning portion, The rotor according to claim 9, wherein the rotor core is formed by rotating and stacking the core pieces around the rotation axis.

12. The rotor according to claim 1 or claim 2, wherein the positioning portion has a circular shape.

13. A rotor according to claim 1 or claim 2, A rotating electric machine comprising a rotor having multiple windings and a stator positioned opposite the rotor on its outer circumference with a predetermined air gap between them.

14. The rotating electric machine according to claim 13, wherein the rotating electric machine is a motor for electric power steering of an automobile.

15. In the method for manufacturing a rotor according to claim 1 or claim 2, After inserting a positioning pin into the through hole of the rotor core having the positioning portion, which has a diameter smaller than the diameter of the other part of the through hole and the maximum diameter that can be inserted into the positioning portion, A method for manufacturing a rotor, comprising: press-fitting the rotating shaft into the press-fit hole of the rotor core and then removing the positioning pin from the rotor core.

16. In a part that is positioned relative to a manufacturing device, The aforementioned component has a through hole into which a positioning pin installed in the manufacturing apparatus can be inserted, The through hole is a component that includes a positioning portion in a part of the through-hole direction having a diameter smaller than the diameter of the other part of the through hole.

17. In the method for manufacturing a component according to claim 16, After inserting the positioning pin, which has a diameter smaller than the diameter of the other part of the through hole having the positioning portion of the component, A method for manufacturing a part, comprising performing the manufacturing process of the part using the manufacturing apparatus, and then removing the positioning pin from the part.

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