KR100828799B1 - Oil cooling structure for motor and generator of hybrid vehicle - Google Patents

Abstract

An oil cooling structure for a motor and a generator of a hybrid vehicle is provided to facilitate layout of an engine room by reducing a size of a cooling device using a coolant or without requiring the cooling device. A housing with a void receives a driving axis which is rotatably mounted by the medium of a bearing. A rotor(14) is mounted on an outer circumference of the driving axis by interposing a sleeve. A stator is fixedly mounted inside the housing and outside the rotor. A coil is installed through the stator. The lubricating oil is injected into a part of void spaces between the coil and the rotor, and the sleeve and the housing. A plurality of spatulas(18) are attached to one outer circumferential surface or both outer circumferential surfaces of the rotor to draw up the oil and splash the oil peripherally.

Description

Oil cooling structure for motor and generator of hybrid vehicle

1 is a cooling circuit diagram of a motor and a generator of a hybrid vehicle according to the prior art,

2 is a schematic cross-sectional view of a motor of a hybrid vehicle to which the present invention is applied;

3 is a perspective view of a state in which the splash spatula according to the present invention is mounted on the rotor,

4 is an explanatory view of the mounting of the splash spatula according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10-housing 11-drive shaft

12-Bearing 13-Sleeve

14-rotor 15-stator

16-coil 17-empty space

18- spatula

The present invention relates to a motor and a generator of a hybrid vehicle, and more particularly, to a motor and generator oil cooling structure of a hybrid vehicle to improve the cooling efficiency of the motor and generator by splashing the lubricating oil through a splash spatula.

The generator and the motor of the conventional hybrid vehicle are cooled by using the coolant, that is, the cooling circuit (2) and the generator (3) cooling the motor (1) with the coolant as shown in FIG. Circuits 4 are provided, respectively, and the cooling circuit 2 of the motor and the cooling circuit 4 of the generator are connected in communication with each other via a connecting hose 5.

Accordingly, a part of the coolant circulating in the cooling circuit of the motor flows into the cooling circuit of the generator, cools the generator, and then flows out of the generator.

As described above, as a hybrid vehicle requires a driving motor and a cooling channel exclusively for a generator separate from the cooling water channel of the engine, the required space of the engine room is gradually expanded, and recently, due to an increase in the output of the driving motor and the generator, As the cooling demand increases, the size of the cooling channel and the size of the radiator are gradually increased, and the design of the engine room aout is complicated by the increase in the volume of the entire case, and the cooling efficiency of the generator and the motor can be increased while taking up less space. There was a need for a solution.

Accordingly, the present invention has been made in view of the above circumstances, and it is possible to efficiently cool the generator and the motor by using the lubricating oil of the generator and the motor, so that it is not necessary to use a cooling device using the cooling water or reduce the size of the engine. The purpose is to provide a motor and generator oil cooling structure for a hybrid vehicle that facilitates the design of the layout of the room and reduces the number of parts, weight and cost of the vehicle.

In order to achieve the above object, the present invention has a structure in which a plurality of spatulas are attached to sprinkle lubricating oil on the rotor to fry them around.

Preferably the plurality of spatulas are attached at an angle of 45 degrees with respect to the horizontal central axis of the rotor.

And each said spatula is characterized in that formed in a semi-circular shape.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 schematically shows a cross section of a motor of a hybrid vehicle to which the present invention is applied, that is, a drive shaft 11 is accommodated in an empty housing 10 to be rotatably mounted via a bearing 12. The rotor 14 is integrally rotated on the outer circumference of the drive shaft 11 via the sleeve 13.

Outside the rotor 14, the stator 15 is fixed to the inside of the housing, the coil 16 is installed through the stator 15, the coil, the rotor, the sleeve and the As the empty space 17 is formed between the housings, lubricating oil is injected into a part of the empty space.

The lubricating oil is injected to about half without being filled to fill the empty space completely. When the drive shaft of the motor is rotated, the lubricating oil is slumped to cool the hot coil and the internal parts a little. do.

Therefore, in the present invention, the lubricating oil is actively used to cool the coil and the peripheral parts more effectively.

That is, as shown in Figure 3, one side or both sides of the outer peripheral surface of the rotor 14 is attached to a plurality of semi-circular spatula 18 is integrally rotated when the rotor rotates while sprinkling the lubricating oil by arrows As shown in the figure, the splashing is performed to improve the lubrication and cooling of the internal parts of the motor and the generator.

Each spatula 18 is attached to the inclined at an angle of approximately 45 degrees with respect to the central axis of the rotor as shown in Figure 4 to facilitate the operation of the lubricating oil up and splashing around.

By spreading the lubricating oil by using a spatula and splashing it to the surrounding parts as described above, the lubricating action and the cooling action by the lubricating oil are performed at the same time effectively, so that there is no need to use a separate cooling device using the cooling water of the generator and the motor, or Since the size can be reduced, the weight, the number of parts and the cost of the vehicle can be reduced.

As described above, according to the motor and generator oil cooling structure of the hybrid vehicle according to the present invention, a plurality of spatulas are integrally attached to a rotor that is rotated by a drive shaft, so that lubricating oil is pumped up using the spatula and splashed to surrounding parts. By lubricating oil and cooling effect by lubricating oil, it is not necessary to use separate cooling device for cooling generator and motor or reduce the size. Not only can the reduction be achieved, but the layout of the engine room can be easily designed.

Claims (3)

The drive shaft 11 is accommodated in the housing 10 which is empty and is rotatably mounted via the bearing 12, and the rotor 14 is integrally formed on the outer circumference of the drive shaft 11 via the sleeve 13. The stator 15 is fixedly mounted to the inside of the housing, the coil 16 is installed through the stator 15, and the coil and the rotor and the outside of the rotor 14. As the empty space 17 is formed between the sleeve and the housing, lubricating oil is injected into a part of the empty space, and a plurality of spatulas are used to pour the oil onto one or both outer circumferential surfaces of the rotor 14 to splash it around. The motor and generator oil cooling structure of the hybrid vehicle to which 18 is integrally attached. The motor and generator oil cooling structure of claim 1, wherein the plurality of spatulas are attached at an angle of 45 degrees with respect to the horizontal center axis of the rotor. 3. The motor and generator oil cooling structure of claim 2, wherein the spatulas are formed in a semicircular shape.

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