Cooling structure of drive motor

• US 10,404,140 B2
• Filed: 12/09/2016
• Issued: 09/03/2019
• Est. Priority Date: 10/24/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Moon, Sanghoon, Kim, Yeonho, Chae, WoongChan, Shin, YoungJin, Cho, Hyoungjun, Kim, Jung Shik
• Primary Examiner(s): Nash, Gary A
• Application Number:
  US15/373,946
• Publication Number:
  US 20180115219A1
• Time in Patent Office: 998 Days
• Field of Search: 310 52- 54
• CPC Class Codes: H02K 1/18 Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: H02K 9/19 for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• CPC Class Codes: H02K 9/193 with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium

Abstract

A cooling structure of a drive motor may include a ring-shaped support member disposed on the inside of a housing and supporting the stator core of the drive motor, in which the support member may have a channel for cooling oil flow therein and nozzle openings for spraying the cooling oil to the stator core and a stator coil wounded around the stator core.

Claims

1. A cooling structure of a drive motor, including

a ring-shaped support member disposed on an inside of a housing and supporting a stator core of the drive motor,

wherein the support member has a channel for cooling oil flow therein and nozzle openings for spraying the cooling oil to the stator core and a stator coil wounded around the stator core,

wherein the nozzle openings are formed toward a first side and a second side of the stator core in the channel, and

wherein the nozzle openings are formed at a portion connecting an inside surface and a first side and a second side of the support member, respectively, and circumferentially spaced from each other with predetermined intervals.

2. The structure of claim 1, whereinthe nozzle openings are inclined toward the first side and the second side of the stator core at the portion connecting the inside surface and the first side and the second side of the support member.

3. A cooling structure of a drive motor, including

a ring-shaped support member disposed on an inside of a housing and supporting a stator core of the drive motor,

where the support member has a channel for cooling oil flow therein and nozzle openings for spraying the cooling oil to the stator core and a stator coil wounded around the stator core, and

a guide formed on a bobbin supporting the stator coil and guiding the cooling oil sprayed from the nozzle openings to the stator coil.

4. The structure of claim 3, wherein the guide has:

a blocking portion disposed adjacent to the nozzle openings of the support member and blocking the cooling oil sprayed from the nozzle openings, and

a guiding portion integally connected to the blocking portion and guiding the cooling oil blocked by the blocking portion to the stator coil.

5. The structure of claim 4, wherein the guide has an L-shaped cross-section.

6. The structure of claim 4, wherein the guiding portion is horizontally connected to a body of the bobbin, and

the blocking portion is vertically connected to the guiding portion.

7. The structure of claim 4, wherein the guiding portion has a curved guiding surface for guiding the cooling oil blocked by the blocking portion to the stator coil.

8. The structure of claim 7, wherein the guiding portion has a guiding opening exposing the stator coil and guiding the cooling oil to the stator coil.

9. The structure of claim 3, wherein the nozzle openings are formed at a portion connecting an inside surface and a first side and a second side of the support member, respectively, and circumferentially spaced from each other with predetermined intervals.

10. The structure of claim 9, wherein the nozzle openings are inclined toward a first side and a second side of the stator core at the portion connecting the inside surface and the first side and the second side of the support member.