JP-2026075331-A - Rotor

JP2026075331AJP 2026075331 AJP2026075331 AJP 2026075331AJP-2026075331-A

Abstract

[Problem] To provide a rotor that can rotate smoothly relative to the axis of rotation. [Solution] A rotor comprising: a fixed rotor fixed to a rotating shaft, which includes a first rotor core and a plurality of first magnets arranged on the first rotor core at equal angular intervals in the circumferential direction; a rotating rotor adjacent to the fixed rotor in the axial direction of the rotating shaft, which includes a second rotor core and a plurality of second magnets arranged on the second rotor core at equal angular intervals in the circumferential direction; a stopper provided adjacent to the second rotor core in the axial direction and rotating integrally with the rotating shaft; a pin protruding from the second rotor core in the axial direction and contacting the stopper when the rotating rotor rotates relative to the fixed rotor and the plurality of first magnets and the plurality of second magnets face each other with the same polarity; a spacer positioned inside the second rotor core and rotating integrally with the rotating shaft; and a sliding part positioned between the second rotor core and the spacer. [Selection Diagram] Figure 1

Inventors

服部宏之
北山武志

Assignees

トヨタ自動車株式会社

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (1)

A fixed rotor, which includes a first rotor core and a plurality of first magnets arranged on the first rotor core at equal angular intervals in the circumferential direction, and is fixed to a rotating shaft, A rotating rotor comprising a second rotor core and a plurality of second magnets arranged on the second rotor core at equal angular intervals in the circumferential direction, adjacent to the fixed rotor in the axial direction of the rotation axis and rotatable with respect to the rotation axis, A stopper is provided adjacent to the second rotor core in the axial direction and rotates integrally with the rotation axis, A pin protruding axially from the second rotor core, which contacts the stopper when the rotating rotor rotates relative to the stationary rotor and the plurality of first magnets and the plurality of second magnets face each other with the same polarity, A spacer positioned inside the second rotor core and rotating integrally with the rotation axis, A sliding component positioned between the second rotor core and the spacer, A rotor equipped with a rotor.

Description

This invention relates to a rotor. A rotor for a rotating electric machine is known, comprising a fixed rotor fixed to the rotating shaft and a rotating rotor adjacent to the fixed rotor in the axial direction of the rotating shaft and rotatable relative to the rotating shaft (for example, Patent Document 1). Japanese Patent Publication No. 2024-068500 Figure 1(a) is a cross-sectional view of a rotor according to an embodiment, Figure 1(b) is a plan view of a fixed rotor viewed from the -X direction, and Figure 1(c) is a plan view of a rotating rotor viewed from the -X direction.Figures 2(a) and 2(b) are plan views showing the rotation of the rotating rotor relative to the spacer in the embodiment. Figure 1(a) is a cross-sectional view of the rotor 100 according to an embodiment. Figure 1(b) is a plan view of the fixed rotor 20 as seen from the -X direction, and Figure 1(c) is a plan view of the rotating rotor 30a as seen from the -X direction. The axial direction of the rotation axis 10 is defined as the X-axis direction. The directions perpendicular to the X-axis direction and mutually perpendicular are defined as the Y-axis direction and the Z-axis direction. The rotor 100 is used by being incorporated into a rotating electric machine mounted on, for example, a hybrid vehicle, an electric vehicle, or a fuel cell vehicle. Although Figure 1(c) shows the rotating rotor 30a, the configuration of the rotating rotor 30b is similar. As shown in Figures 1(a) to 1(c), the rotor 100 comprises a rotation axis 10, a fixed rotor 20, rotating rotors 30a and 30b, spacers 40a and 40b, sliding parts 50a and 50b, and stoppers 60a and 60b. The fixed rotor 20 includes a first rotor core 21 and a plurality of first magnets 22 embedded so as to penetrate the first rotor core 21 in the X-axis direction. The first rotor core 21 has a cylindrical shape extending in the X-axis direction. The first magnets 22 are permanent magnets. The rotating shaft 10 is fitted and fixed into the first rotor core 21. Therefore, the fixed rotor 20 can rotate integrally with the rotating shaft 10. The plurality of first magnets 22 are arranged at equal angular intervals in the circumferential direction of the first rotor core 21 so that their polarities alternate. For example, eight first magnets 22 are arranged at equal angular intervals in the circumferential direction of the first rotor core 21. The rotating rotors 30a and 30b are provided adjacent to the fixed rotor 20, sandwiching it in the X-axis direction. Each rotating rotor 30a and 30b includes a second rotor core 31 and a plurality of second magnets 32 embedded so as to penetrate the second rotor core 31 in the X-axis direction. The second rotor core 31 has a larger inner diameter than the first rotor core 21 and is cylindrical in shape, extending parallel to the X-axis direction. The second magnets 32 are permanent magnets. The second rotor core 31 is not fixed to the rotation shaft 10, but is rotatably mounted to the rotation shaft 10 via sliding parts 50a or 50b. Therefore, the rotating rotors 30a and 30b are mounted on the rotation shaft 10 in a manner that allows them to rotate relative to the rotation shaft 10 and the fixed rotor 20. The outer diameter of the second rotor core 31 is approximately the same as the outer diameter of the first rotor core 21. Multiple second magnets 32 are arranged at equal angular intervals in the circumferential direction of the second rotor core 31, with alternating polarities. For example, eight second magnets 32 are arranged at equal angular intervals in the circumferential direction of the second rotor core 31. The distance from the central axis 11 of the rotation axis 10 to the second magnets 32 is approximately the same as the distance from the central axis 11 to the first magnets 22. Therefore, the second magnets 32 can face the first magnets 22 in the X-axis direction. The number of second magnets 32 is the same as the number of first magnets 22, so that all second magnets 32 face all first magnets 22 in the X-axis direction. Spacers 40a and 40b are positioned inside the second rotor core 31 of the rotating rotors 30a and 30b, respectively. Spacers 40a and 40b are cylindrical in shape. The rotating shaft 10 is fitted and fixed to spacers 40a and 40b. Therefore, spacers 40a and 40b are rotatable integrally with the rotating shaft 10. Sliding component 50a is positioned between spacer 40a and the rotating rotor 30a. Similarly, sliding component 50b is positioned between spacer 40b and the rotating rotor 30b. Sliding components 50a and 50b are, for example, bearings such as bush bearings. As shown in Figure 1(a), the stopper 60a is fitted and fixed to one end of the rotating shaft 10. The stopper 60a is adjacent to the spacer 40a in the X-axis direction. Similarly, the stopper 60b is fitted and fixed to the other end of the rotating shaft 10. The stopper 60b is adjacent to the spacer 40b in the X-axis direction. The stoppers 60a and 60b are forme