Coil multi-cooling path type drive motor and eco-friendly vehicle having the same

• US 10,615,668 B2
• Filed: 12/12/2017
• Issued: 04/07/2020
• Est. Priority Date: 09/26/2017
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Yang, Hong-Seok, Kim, Myung-Gyu, Lee, Hee-Ra
• Primary Examiner(s): Kim, John K
• Application Number:
  US15/838,543
• Publication Number:
  US 20190097500A1
• Time in Patent Office: 847 Days
• Field of Search: 310 52, 310 54
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/40 characterised by the assembly or relative disposition of components
• CPC Class Codes: B60K 6/405 Housings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: H02K 1/185 to outer stators
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 11/225 Detecting coils
• CPC Class Codes: H02K 5/203 specially adapted for liquids, e.g. cooling jackets
• CPC Class Codes: H02K 7/108 with friction clutches
• CPC Class Codes: H02K 9/02 by ambient air flowing through the machine
• 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
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A drive motor is provided in which a coil is cooled in a three-dimensional manner. The drive motor includes a coil multi-cooling path through which oil collected by centrifugal force of a rotor flows to an engine clutch from an internal space of a rotor sleeve to be scattered in forward and backward directions of a coil and simultaneously flows to a resolver from an external space of the rotor sleeve to be scattered in the backward direction of the coil.

Claims

1. A drive motor, in which a coil is cooled in a three-dimensional manner, comprising:

a coil multi-cooling path that collects oil by centrifugal force of a rotor,

wherein the coil multi-cooling path includes;

a coil cooling path through which the oil flowing to the engine clutch is scattered in the forward direction of the coil;

an engine clutch cooling path through which the oil flowing to the engine clutch is scattered in the back direction of the coil; and

a resolver cooling path through which the oil flowing to the resolver is scattered in the backward direction of the coil, and

wherein the coil cooling path and the engine clutch cooling path are formed at intervals in a circular body that defines the internal space of the rotor sleeve, and the resolver cooling path is formed in a resolver boss protruding toward a shaft boss of the rotor sleeve to be blocked from the internal space.

2. The drive motor of claim 1, wherein the oil flowing to the resolver is mixed with the oil flowing to the engine clutch to be scattered in the backward direction of the coil.

3. The drive motor of claim 1, wherein the coil cooling path includes a front bobbin scattering aperture formed radially of a circular body of the rotor sleeve that defines the internal space, and a front coil scattering groove formed in a bobbin coupled to the coil to scatter the oil scattered from the front bobbin scattering aperture in the forward direction of the coil.

4. The drive motor of claim 1, wherein the engine clutch cooling path includes a rear bobbin scattering aperture formed in the rotor sleeve, and a rear coil scattering groove formed in a bobbin coupled to the coil to scatter the oil scattered from the rear bobbin scattering aperture in the backward direction of the coil.

5. The drive motor of claim 4, wherein the rear bobbin scattering aperture includes of an inlet passage, a connection passage, and an outlet passage, the inlet passage operates as an inlet for inflow of the oil, the outlet passage operates as an inlet for inflow of the oil scattered from the resolver cooling path to flow to the resolver together with an outlet through which the oil is scattered in the backward direction of the coil, and the connection passage connects the inlet passage to the outlet passage.

6. The drive motor of claim 5, wherein the connection passage has a rectilinear shape, the inlet passage communicates with a first end of the connection passage at a right angle, and the outlet passage is formed in the rotor sleeve to communicate with a second end of the connection passage at a right angle.

7. The drive motor of claim 1, wherein the resolver cooling path includes a resolver passage formed in a resolver boss of the rotor sleeve, and the oil flowing to the resolve is transferred to the engine clutch cooling path through the resolver passage.

8. The drive motor of claim 7, wherein the resolver passage has an angle of inclination to be directed toward the engine clutch cooling path.

9. The drive motor of claim 7, wherein the oil flowing to the resolver is transferred to an oil collection protrusion to be introduced into the engine clutch cooling path through the resolver passage.

10. The drive motor of claim 9, wherein the oil collection protrusion is formed in the rotor sleeve having the engine clutch cooling path formed therein.

11. The drive motor of claim 1, wherein the coil is wound around a stator, and the stator is cooled by coolant circulated in a cooling channel.