Rotor and motor having an insulator for rotor teeth

• US 10,644,569 B2
• Filed: 07/20/2016
• Issued: 05/05/2020
• Est. Priority Date: 07/21/2015
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Jong Chan
• Primary Examiner(s): Hollington, Jermele M
• Assistant Examiner(s): Johnson, Rashad H
• Application Number:
  US15/215,295
• Publication Number:
  US 20170025926A1
• Time in Patent Office: 1,385 Days
• Field of Search: 31015608, 31015609, 310194, 310 62, 310 63, 310 64, 310 89
• CPC Class Codes: H02K 1/24 Rotor cores with salient poles ; Variable reluctance rotors
• CPC Class Codes: H02K 1/26 Rotor cores with slots for windings
• CPC Class Codes: H02K 1/30 using intermediate parts, e.g. spiders
• CPC Class Codes: H02K 2203/12 Machines characterised by the bobbins for supporting the windings
• CPC Class Codes: H02K 3/527 applicable to rotors only
• CPC Class Codes: H02K 5/18 with ribs or fins for improving heat transfer
• CPC Class Codes: H02K 5/207 with openings in the casing specially adapted for ambient air
• CPC Class Codes: H02K 9/06 with fans or impellers driven by the machine shaft

Abstract

Provided is a rotor including a rotor core, a plurality of teeth disposed at an outer side of the rotor core, and an insulator configured to surround the teeth wherein the teeth are detachably coupled to the rotor core, the insulator includes a body configured to surround the teeth, and a blade configured to protrude from at least one of an upper surface and a lower surface of the body, and thereby the number of manufacturing components is reduced and manufacturing costs and the number of manufacturing processes are reduced.

Claims

1. A rotor comprising:

a rotor core;

a plurality of teeth disposed at an outer side of the rotor core;

a coil wound around the rotor; and

a plurality of insulators, each insulator surrounding a respective tooth and configured to electrically insulate the coil from the rotor,

wherein each insulator among the plurality of insulators engages adjacent insulators among the plurality of insulators,

wherein the teeth are detachably coupled to the rotor core, and

wherein each insulator includes;

a body surrounding the respective tooth; and

a blade protruding in an axial direction from at least one of an upper surface and a lower surface of the body.

2. The rotor of claim 1, wherein each insulator includes a coupling slot concavely formed on a first side surface thereof to engage a first adjacent insulator among the adjacent insulators and a coupling protrusion convexly formed on a second side surface thereof to engage a second adjacent insulator among the adjacent insulators, and

wherein the coupling slot and coupling protrusion extend a width of each insulator.

3. The rotor of claim 1, wherein each insulator includes a first coupling slot concavely formed at an upper portion of a first side surface to engage a first adjacent insulator among the adjacent insulators and a first coupling protrusion convexly formed at a lower portion of the first side surface to engage the first adjacent insulator, and

wherein the first coupling slot and first coupling protrusion extend a width of each insulator.

4. The rotor of claim 3, wherein each insulator includes a second coupling protrusion convexly formed at an upper portion of a second side surface to engage a second adjacent insulator among the adjacent insulators and a second coupling slot concavely formed at a lower portion of the second side surface to engage the second adjacent insulator, and

wherein the second coupling slot and second coupling protrusion extend a width of each insulator.

5. The rotor of claim 1, wherein the blade is obliquely formed to form a receiving angle with respect to a reference line formed in a radial direction from a rotational center of the rotor.

6. The rotor of claim 1, wherein the rotor core includes an assembling slot concavely formed on an outer circumferential surface thereof in an axial direction of the rotor and an assembling protrusion formed at an inner end part of the teeth to be inserted into the assembling slot.

7. The rotor of claim 1, wherein the plurality of teeth extend in a radial direction, and

wherein the blade of each insulator protrudes from the body in a direction perpendicular to the radial direction.

8. The rotor of claim 1, wherein the upper surface and the lower surface of the body of each insulator are planar.

9. The rotor of claim 1, wherein an outermost extent of the blade in a radial direction from a rotational center of the rotor and an outermost extent of the plurality of teeth in the radial direction have substantially the same radial position.

10. The rotor of claim 1, wherein the blade comprises an upper blade protruding from the upper surface of the body, and further comprising a lower blade protruding from the lower surface of the body.

11. A motor comprising:

a rotating shaft;

a rotor through which the rotating shaft passes; and

a stator disposed at an outer side of the rotor,

wherein the rotor includes;

a rotor core;

a plurality of teeth disposed at an outer side of the rotor core;

a coil wound around the rotor; and

a plurality of insulators, each insulator surrounding a respective tooth and configured to electrically insulate the coil from the rotor,

wherein each insulator among the plurality of insulators engages adjacent insulators among the plurality of insulators,

wherein the teeth are detachably coupled to the rotor core, and

wherein each insulator includes;

a body surrounding the respective tooth; and

a blade protruding in an axial direction from at least one of an upper surface and a lower surface of the body.

12. The motor of claim 11, wherein each insulator includes a coupling slot concavely formed on a first side surface thereof to engage a first adjacent insulator among the adjacent insulators and a coupling protrusion convexly formed on a second side surface thereof to engage a second adjacent insulator among the adjacent insulators, and

wherein the coupling slot and coupling protrusion extend a width of each insulator.

13. The motor of claim 11, wherein each insulator includes a first coupling slot concavely formed at an upper portion of a first side surface to engage a first adjacent insulator among the adjacent insulators and a first coupling protrusion convexly formed at a lower portion of the first side surface to engage the first adjacent insulator, and

wherein the first coupling slot and first coupling protrusion extend a width of each insulator.

14. The motor of claim 13, wherein each insulator includes a second coupling protrusion convexly formed at an upper portion of a second side surface to engage a second adjacent insulator among the adjacent insulators and a second coupling slot concavely formed at a lower portion of the second side surface to engage the second adjacent insulator, and

wherein the second coupling slot and second coupling protrusion extend a width of each insulator.

15. The motor of claim 11, wherein the blade is obliquely formed to form a receiving angle with respect to a reference line formed in a radial direction from a rotational center of the rotor.

16. The motor of claim 11, wherein the rotor core includes an assembling slot concavely formed on an outer circumferential surface thereof in an axial direction of the rotor and an assembling protrusion formed at an inner end part of the teeth to be inserted into the assembling slot.

17. The motor of claim 11, wherein the plurality of teeth extend in a radial direction, and

wherein the blade of each insulator protrudes from the body in a direction perpendicular to the radial direction.

18. The motor of claim 11, wherein the upper surface and the lower surface of the body of each insulator are planar.

19. The motor of claim 11, wherein an outermost extent of the blade in a radial direction from a rotational center of the rotor and an outermost extent of the plurality of teeth in the radial direction have substantially the same radial position.

20. The motor of claim 11, wherein the blade comprises an upper blade protruding from the upper surface of the body, and further comprising a lower blade protruding from the lower surface of the body.