Vehicle motor with splittable stator and rotor

Patent metadata

Field	Value
Publication number	US-12126228-B2
Application number	US-202217724167-A
Country	US
Kind code	B2
Filing date	Apr 19, 2022
Priority date	May 17, 2021
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

A vehicle motor includes a stator, a rotor, and a shaft. The stator has a ring shape. The rotor is disposed radially inward of the stator. The shaft is disposed radially inward of the rotor and is configured to rotate together with the rotor. The stator is splittable into a plurality of parts, and the rotor is splittable into a plurality of parts.

First claim

The invention claimed is:

1. A vehicle motor comprising:
a stator;
a rotor disposed radially inward of the stator;
a shaft disposed radially inward of the rotor and configured to rotate together with the rotor; and
at least one spoke configured to couple the shaft and the rotor;
wherein the stator includes a plurality of first splitting points that are cutouts formed radially inward from an outer peripheral surface of the stator,
wherein the rotor includes a plurality of second splitting points that are cutouts formed radially outward from an inner peripheral surface of the rotor, and
wherein the at least one spoke is disposed along a tangential direction of the shaft when viewed from a vehicle-width direction, and only on the rotational side where a vehicle moves forward.

2. The vehicle motor according to claim 1 ,
wherein the at least one first splitting point of the stator comprises a splitting point provided at either of a front side and a rear side of a vehicle.

3. The vehicle motor according to claim 2 ,
wherein how many parts the stator is splittable into is smaller than how many parts the rotor is splittable into.

4. The vehicle motor according to claim 3 , further comprising:
wherein the at least one spoke has a linear cross-section in a direction in which the shaft extends.

5. The vehicle motor according to claim 2 , further comprising:
wherein the at least one spoke has a linear cross-section in a direction in which the shaft extends.

6. The vehicle motor according to claim 1 ,
wherein how many parts the stator is splittable into is smaller than how many parts the rotor is splittable into.

7. The vehicle motor according to claim 6 , further comprising:
wherein the at least one spoke has a linear cross-section in a direction in which the shaft extends.

8. The vehicle motor according to claim 1 , further comprising:
wherein the at least one spoke has a linear cross-section in a direction in which the shaft extends.

9. The vehicle motor according to claim 8 , wherein the rotor further comprises a plurality of the second splitting points, and
wherein the rotor splits into a plurality of split sleeves starting from the plurality of the second splitting points serving as origin points, and
wherein when the external force is applied to the motor is transmitted to the at least one spoke, a first end of the at least one spoke coupled to a shaft breaks, and a second end of the at least one spoke disengages from a protrusion disposed on an inner peripheral surface of one of the split sleeves.

10. The vehicle motor according to claim 1 , wherein the rotor further comprises a plurality of the second splitting points, and
wherein the rotor splits into a plurality of split sleeves starting from the plurality of the second splitting points serving as origin points.

11. The vehicle motor according to claim 1 , wherein the stator further comprises a plurality of the first splitting points, and
wherein the stator splits into a plurality of parts starting from the plurality of the first splitting points serving as origin points.

12. A vehicle comprising the vehicle motor according to claim 1 ,
wherein the vehicle motor is an in-wheel motor.

13. The vehicle motor according to claim 1 , further comprising:
wherein the at least one spoke has a linear straight line cross-section in a direction in which the shaft extends.

14. The motor according to claim 1 ,
wherein a number of the at least one spoke is equal to a number of the first splitting points.

15. A motor comprising:
a stator;
a rotor disposed radially inward of the stator;
a shaft disposed radially inward of the rotor and configured to rotate together with the rotor; and
at least one spoke configured to couple the shaft and the rotor;
wherein the stator includes a plurality of first splitting points that are cutouts formed radially inward from an outer peripheral surface of the stator,
wherein the rotor includes a plurality of second splitting points that are cutouts formed radially outward from an inner peripheral surface of the rotor, and
wherein the at least one spoke is disposed along a tangential direction of the shaft when viewed from a vehicle-width direction, and only on the rotational side where a vehicle moves forward.

16. The motor according to claim 15 ,
wherein the at least one first splitting point of the stator comprises a splitting point provided at either of a front side and a rear side of a vehicle.

17. The motor according to claim 15 ,
wherein how many parts the stator is splittable into is smaller than how many parts the rotor is splittable into.

18. The motor according to claim 15 , further comprising:
wherein the at least one spoke has a linear cross-section in a direction in which the shaft extends.

19. The motor according to claim 15 , wherein the rotor further comprises a plurality of the second splitting points, and
wherein the rotor splits into the plurality of parts starting from the plurality of the second splitting points serving as origin points,
wherein the stator further comprises a plurality of the first splitting points, and
wherein the stator splits into the plurality of parts starting from the plurality of the first splitting points serving as origin points.

Assignees

• Subaru Corp

Inventors

• Kuwabara Mitsumasa
• Morita Tomohiro

Classifications

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H02K1/17

  Stator cores with permanent magnets · CPC title

• H02K1/22

  Rotating parts of the magnetic circuit · CPC title

• H02K2213/06

  Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements · CPC title

• H02K21/14

  with magnets rotating within the armatures · CPC title