Rotary electric machine

Patent metadata

Field	Value
Publication number	US-2025357807-A1
Application number	US-202519182974-A
Country	US
Kind code	A1
Filing date	Apr 18, 2025
Priority date	May 15, 2024
Publication date	Nov 20, 2025
Grant date	—

Abstract

A rotary electric machine includes a rotor shaft, a stator having a stator core, and paired rotors each of which is connected to the rotor shaft while maintaining a predetermined gap from the stator core. The paired rotors are provided to oppose each other in a manner to sandwich the stator core from both sides in an axial direction. In an opening that is provided in the stator core and penetrates the stator core in the axial direction, paired rollers which are aligned in the axial direction, are each provided to be rotatable about a radial direction. The paired rollers are in contact with each other in the opening, and portions thereof that protrude outward in the axial direction from the opening are in contact with the paired rotors, respectively.

First claim

What is claimed is:

1 . A rotary electric machine comprising:
a rotational shaft; a stator having an annular stator core that is coaxial with the rotational shaft; and paired rotors, each of which is connected to the rotational shaft while maintaining a predetermined gap from the stator core, wherein the paired rotors are provided to oppose each other in an axial direction of the rotational shaft in a manner to sandwich the stator core from both sides in the axial direction, or to oppose each other in a radial direction of the rotational shaft in a manner to sandwich the stator core from radially inner and outer sides, the stator core is provided with an opening that penetrates the stator core in an opposing direction of the paired rotors, in the opening, paired rotating bodies are rotatably provided to be aligned in the opposing direction, and the paired rotating bodies are in contact with each other in the opening, and a portion of each of the rotating bodies that protrudes outward in the opposing direction from the opening is in contact with at least one of the paired rotors.

2 . The rotary electric machine according to claim 1 , wherein
the paired rotors are provided to oppose each other in the axial direction in the manner to sandwich the stator core from both of the sides in the axial direction, the opening is provided in the stator core in a manner to penetrate the stator core in the axial direction, and the paired rotating bodies are provided in the opening in a manner to be rotatable about the radial direction and be aligned in the axial direction, and a portion of each of the rotating bodies that protrudes toward each of outer sides in the axial direction from the opening is in contact with at least one of the paired rotors.

3 . The rotary electric machine according to claim 1 , wherein
the stator core has a cylindrical shape, the paired rotors are provided to oppose each other in the radial direction in the manner to sandwich the stator core from the radially inner and outer sides, the opening is provided in the stator core in a manner to penetrate the stator core in the radial direction, and the paired rotating bodies are provided in the opening in a manner to be rotatable about the axial direction and be aligned in the radial direction, and a portion of each of the rotating bodies that protrudes radially inward and outward from the opening is in contact with at least one of the paired rotors.

4 . The rotary electric machine according to claim 1 , wherein each of the rotating bodies is made of a magnetic body.

5 . The rotary electric machine according to claim 2 , wherein each of the rotating bodies is made of a magnetic body.

6 . The rotary electric machine according to claim 3 , wherein each of the rotating bodies is made of a magnetic body.

7 . The rotary electric machine according to claim 4 , wherein an electromagnetic fluid is interposed between the rotating body and the rotor.

8 . The rotary electric machine according to claim 5 , wherein an electromagnetic fluid is interposed between the rotating body and the rotor.

9 . The rotary electric machine according to claim 6 , wherein an electromagnetic fluid is interposed between the rotating body and the rotor.

Assignees

• Mazda Motor

Inventors

• Yonemori Kei

Classifications

• H02K2205/03

  Machines characterised by thrust bearings · CPC title

• H02K21/24

  with magnets axially facing the armatures, e.g. hub-type cycle dynamos · CPC title

• H02K21/22

  with magnets rotating around the armatures, e.g. flywheel magnetos · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• H02K1/2798 Primary

  where both axial sides of the stator face a rotor · CPC title