Rotor of a rotating electric machine and method for manufacturing a rotor

Abstract

The present invention provides a rotor for a rotating electric machine that can automatically insert magnets into magnet insertion holes, even when the gap between the magnet insertion hole and the magnet is small. [Solution] A rotor for a rotating electric machine in which magnets are inserted into a plurality of magnet insertion holes that penetrate in the axial direction, wherein each magnet has a first chamfered portion, which is formed by chamfering the corner where a first side surface, one of a plurality of sides arranged along the axial direction of the rotor, intersects with one end surface in the axial direction, and a second chamfered portion, which is formed by chamfering the corner where a second side surface, one of a plurality of sides arranged along the axial direction of the rotor, which is adjacent to the first side surface, intersects with one end surface.

Claims

1. A rotor for a rotating electric machine in which magnets are inserted into multiple magnet insertion holes that penetrate in the axial direction, The aforementioned magnet is A first chamfered portion is formed by chamfering the corner where the first side surface and one end face in the axial direction intersect among a plurality of side surfaces arranged along the axial direction of the rotor, A rotor for a rotating electric machine, having a second chamfered portion formed by chamfering the corner where a second side, which is adjacent to a first side among a plurality of sides arranged along the axial direction of the rotor, intersects with the one end face.

2. The rotor of the rotating electric machine according to claim 1, wherein the amount of chamfering of the first chamfered portion and the second chamfered portion is greater than the amount of protrusion of the step formed on the inner wall surface of the magnet insertion hole.

3. A method for manufacturing a rotor of a rotating electric machine, comprising inserting magnets into magnet insertion holes formed in the rotor of the rotor, The aforementioned magnet is A first chamfered portion is formed by chamfering the corner where the first side surface and one end face in the axial direction intersect among a plurality of side surfaces arranged along the axial direction of the rotor, The rotor has a second chamfered portion, which is formed by chamfering the corner where the second side, which is adjacent to the first side among a plurality of side surfaces arranged along the axial direction of the rotor, intersects with the one end face. A positioning step of positioning the magnet using a positioning jig that uses the two inner surfaces that abut the first and second surfaces of the magnet as reference surfaces, A positioning step of aligning the reference surface of the positioning jig that has positioned the magnet so that it coincides with the positions of two adjacent sides in the opening of the magnet insertion hole, A method for manufacturing a rotor, comprising: an insertion step of pushing the magnet out of the positioning jig and inserting it into the magnet insertion hole, while the position of the reference surface of the positioning jig and the positions of the two sides of the opening are aligned.

4. The method for manufacturing a rotor according to claim 3, wherein the amount of chamfering of the first chamfered portion and the second chamfered portion is greater than the amount of protrusion of the step formed on the inner wall surface of the magnet insertion hole.

5. The method for manufacturing a rotor according to claim 3 or 4, wherein the positioning step involves supporting the magnet on the positioning jig by pressing the magnet against the two inner surfaces of the positioning jig with a support device.

6. The method for manufacturing a rotor according to claim 5, wherein the positioning step involves elastically pressing the magnet against the two inner surfaces of the positioning jig using the support device.

7. The method for manufacturing a rotor according to claim 5, wherein the positioning step involves pressing the magnet against the two inner surfaces of the positioning jig by making point contact or line contact of the support device with the magnet.

8. The method for manufacturing a rotor according to claim 5, wherein the positioning step involves providing a difference in the pressing load used to press the first side surface and the second side surface of the magnet against the two inner surfaces of the positioning jig, respectively.

9. The method for manufacturing a rotor according to claim 5, wherein the insertion step involves rotating the tip of the support device in accordance with the movement of the magnet that has been pushed toward the magnet insertion hole.

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