Rotor plate and rotor assembly including the same

Patent metadata

Field	Value
Publication number	US-11894758-B2
Application number	US-202217857445-A
Country	US
Kind code	B2
Filing date	Jul 5, 2022
Priority date	Jul 5, 2021
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

Disclosed are a rotor plate and a rotor assembly including the same. The rotor plate includes a plate body including a first part having a first hole at a center, and a second part having a second hole at a center, the second part having a diameter corresponding to the first part, and connected to the first part in a first direction that is an axial direction perpendicular to the first part, and a diameter of the second hole is larger than a diameter of the first hole, a first slot recessed on an outer peripheral surface of the plate body, a second slot recessed on the outer peripheral surface of the plate body, and a first plate passage formed on a wall of the first part in the second direction that is opposite to the first direction, and connecting the first slot and the first hole.

First claim

What is claimed is:

1. A rotor plate comprising:
a plate body comprising a first part having a first hole at a center thereof, and a second part having a second hole at a center thereof, the second part having a diameter corresponding to the first part, and connected to the first part in a first direction that is an axial direction perpendicular to the first part, and a diameter of the second hole is larger than a diameter of the first hole;
a first slot recessed on an outer peripheral surface of the plate body, and a length of the first slot along the first direction being smaller than a length of the plate body along the first direction;
a second slot recessed on the outer peripheral surface of the plate body, and a length of the second slot along the first direction corresponding to a length of the plate body along the first direction; and
a first plate passage formed on a wall of the first part in a second direction that is opposite to the first direction, and connecting the first slot and the first hole.

2. The rotor plate of claim 1 , wherein a width of the first slot along a circumferential direction of the plate body increases in the first direction.

3. The rotor plate of claim 1 , wherein a width of the second slot along a circumferential direction of the plate body increases in the first direction.

4. The rotor plate of claim 1 , wherein the first slot is opened in the first direction, and
wherein the rotor plate further comprises a passage hole formed at a distal end of the first slot in the second direction, and connecting the first plate passage and the first slot.

5. The rotor plate of claim 4 , wherein a side wall of the first part in the second direction comprises:
a peripheral area located in a radially outward direction of the first hole with respect to the passage hole.

6. The rotor plate of claim 1 , wherein the first slot comprises:
a (1-1)-th surface facing a radially outward direction of the plate body;
a (1-2)-th surface provided on one side of the (1-1)-th surface and connecting the outer peripheral surface of the plate body and the (1-1)-th surface;
a (1-3)-th surface provided on an opposite side of the (1-1)-th surface and connecting the outer peripheral surface of the plate body and the (1-1)-th surface; and
a (1-4)-th surface provided in the second direction of the (1-1)-th surface and connecting the (1-2)-th surface and the (1-3)-th surface.

7. The rotor plate of claim 6 , wherein the (1-2)-th surface and the (1-3)-th surface are curved surfaces.

8. The rotor plate of claim 6 , wherein a (1-1)-th line that is a border line of the (1-1)-th surface and the (1-2)-th surface and a (1-2)-th line that is a border line of the (1-1)-th surface and the (1-3)-th surface are inclined with respect to the first direction.

9. The rotor plate of claim 6 , wherein a (1-1)-th line that is a border line of the (1-1)-th surface and the (1-2)-th surface and a (1-2)-th line that is a border line of the (1-1)-th surface and the (1-3)-th surface are curved lines.

10. The rotor plate of claim 6 , wherein a (1-3)-th line that is a border line of the outer peripheral surface and the (1-2)-th surface and a (1-4)-th line that is a border line of the outer peripheral surface and the (1-3)-th surface are inclined with respect to the first direction.

11. The rotor plate of claim 6 , wherein a (1-3)-th line that is a border line of the outer peripheral surface and the (1-2)-th surface and a (1-4)-th line that is a border line of the outer peripheral surface and the (1-3)-th surface are curved lines.

12. The rotor plate of claim 1 , wherein the second slot comprises:
a (2-1)-th surface facing a radially outward direction of the plate body;
a (2-2)-th surface provided on one side of the (2-1)-th surface and connecting the outer peripheral surface of the plate body and the (2-1)-th surface; and
a (2-3)-th surface provided on an opposite side of the (2-1)-th surface and connecting the outer peripheral surface of the plate body and the (2-1)-th surface.

13. The rotor plate of claim 12 , wherein the (2-2)-th surface and the (2-3)-th surface are curved surfaces.

14. The rotor plate of claim 1 , wherein the first slot and the second slot are alternately arranged along a circumferential direction of the plate body.

15. The rotor plate of claim 1 , wherein the plate body further comprises:
a boss member protruding from a first area of the first part in a radially inward direction of the first hole, the first area being an area that defines the first hole.

16. The rotor plate of claim 1 , wherein a diameter of the second hole increases in the first direction.

17. A rotor assembly comprising:
a rotor shaft extending in a first direction, and having a first passage extending in the first direction and a second passage communicated with an interior of the first passage, the second passage extending in a radially outward direction of the first passage;
a rotor core disposed to surround an outer peripheral surface of the rotor shaft; and
a rotor plate comprising a first plate passage disposed to surround the outer peripheral surface of the rotor shaft, extending in the radially outward direction, and communicated with the second passage, and a second plate passage bent at a distal end of the first plate passage in the radially outward direction.

18. The rotor assembly of claim 17 , wherein the rotor plate comprises:
a plate body;
a first slot recessed on the outer peripheral surface of the plate body having a length along the first direction smaller than a length of the plate body along the first direction, and the first slot formed to be opened in the first direction,
wherein the rotor plate further comprises a passage hole formed at a distal end of the first slot in a second direction, and connecting the first plate passage and the first slot, and
wherein the second plate passage is defined by the first slot.

19. The rotor assembly of claim 17 , wherein the rotor core comprises:
a core passage communicating with the first plate passage and extending along the first direction.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Seo Yeong Woo

Classifications

• H02K9/22 Primary

  by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges · CPC title

• H02K1/22

  Rotating parts of the magnetic circuit · CPC title

• H02K1/32 Primary

  with channels or ducts for flow of cooling medium · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• Y02T10/64

  Electric machine technologies in electromobility · CPC title