JP2013167296A - Lubricating structure of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating structure of a rotary electric machine that can improve cooling effect of a second rotary electric machine during travel on an uphill road.SOLUTION: During travel on a flat road, a lubricant flowing down from a supply hole 3c of a lubricant receiving part 3 is dripped from a front end of a lubricant guide member 4 downward, and is supplied to a first rotary electric machine MG 1 which is to be cooled. During travel on an uphill road, the lubricant flowing down from the supply hole 3c of the lubricant receiving part 3 is flown along in a longitudinal direction of the lubricant guide member 4, is dripped downward from a rear end of the lubricant guide member, and is supplied to a second rotary electric machine MG 2 which is to be cooled.

Description

  The present invention relates to a lubricating structure for a rotating electrical machine applied to a hybrid vehicle.

Some hybrid vehicles include a first rotating electrical machine that is a motor generator and a second rotating electrical machine that is a motor generator.
The first rotating electrical machine mainly plays a role of charging power to the battery and a role of supplying driving power to the second rotating electrical machine.
The second rotating electrical machine is mainly operated by electric power supplied from the battery or the first rotating electrical machine, and plays a role of driving the wheels.
2. Description of the Related Art Conventionally, there has been proposed an apparatus that includes an oil receiving portion serving as a lubricating oil tank and a supply ratio variable mechanism and that can supply lubricating oil to a first rotating electrical machine and a second rotating electrical machine (for example, see Patent Document 1). ).

Each of the first rotating electrical machine and the second rotating electrical machine has a rotor shaft that extends horizontally in the vehicle width direction, and the first rotating electrical machine and the second rotating electrical machine are housed in a case.
The first rotating electrical machine is disposed in a front portion in the vehicle front-rear direction within the case, and the second rotating electrical machine is disposed in a rear portion in the vehicle front-rear direction in the case. In addition, the second rotating electrical machine is located in the upper part of the vehicle in the vertical direction with respect to the first rotating electrical machine in the case.

The oil receiving portion is formed in the upper portion of the vehicle in the vertical direction within the case. The oil receiver has an oil passage extending in the vehicle front-rear direction. The oil passage is configured to descend from the rear side toward the front side in the vehicle longitudinal direction. Therefore, the lubricating oil fed to the oil receiving portion flows through the oil path from the rear side of the vehicle front to the front side.
The oil receiving part has a first opening and a second opening. The first opening is configured to supply lubricating oil from the oil passage to the first rotating electrical machine. The second opening is configured to supply lubricating oil from the oil passage to the second rotating electrical machine.
Therefore, the first rotating electric machine and the second rotating electric machine are cooled by the lubricating oil supplied from the first opening and the second opening in the oil receiving part, respectively.

The supply ratio variable mechanism is provided in the oil passage so as to be positioned between the first opening and the second opening. This variable supply ratio mechanism is configured to be able to adjust the cross-sectional area of the oil passage between the first opening and the second opening in accordance with the running state of the vehicle.
The supply ratio variable mechanism keeps the flow passage cross section of the oil passage at a predetermined value when traveling on a flat road where the vehicle runs on a flat road. Further, the supply ratio variable mechanism is configured to reduce the flow passage cross section of the oil passage when traveling on an uphill road where the vehicle travels on an uphill road, rather than when traveling on a flat road.
Therefore, when traveling on an uphill road, the amount of lubricating oil supplied to the first rotating electrical machine decreases and the amount of lubricating oil supplied to the second rotating electrical machine increases compared to when traveling on a flat road. . Further, when traveling on a flat road, the amount of lubricating oil supplied to the first rotating electrical machine increases and the amount of lubricating oil supplied to the second rotating electrical machine decreases compared to when traveling on an uphill road. .
That is, the lubricating oil supply device in Patent Document 1 adjusts the relative ratio between the amount of lubricating oil supplied to the first rotating electrical machine and the amount of lubricating oil supplied to the second rotating electrical machine. .

JP 2011-158069 A

  However, since the lubricating oil supply device in Patent Document 1 cannot selectively supply the lubricating oil only to the second rotating electrical machine, the second rotating electrical machine using the lubricating oil during traveling on an uphill road where the amount of heat generated by the second rotating electrical machine increases. It was difficult to improve the cooling effect.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a lubricating structure for a rotating electrical machine that can improve the cooling effect of the second rotating electrical machine when traveling on an uphill road. .

  In order to solve the above problems, the lubricating structure for a rotating electrical machine according to the present invention includes (1) a first rotating electrical machine, a second rotating electrical machine, a case that houses the first rotating electrical machine and the second rotating electrical machine, A lubricating structure for a rotating electrical machine comprising a lubricating oil receiving portion and a lubricating oil guide member and capable of supplying lubricating oil to the first rotating electrical machine and the second rotating electrical machine, wherein the first rotating electrical machine includes the case Disposed in the front portion of the vehicle in the longitudinal direction of the vehicle, the second rotating electrical machine is disposed in the rear portion of the case in the longitudinal direction of the vehicle, and the lubricating oil receiving portion is located in the upper portion of the case, The lubricating oil receiving portion has a supply hole for flowing lubricating oil toward the first rotating electrical machine, the lubricating oil guide member is provided in the case, and the lubricating oil guide member is driven on a flat road. Sometimes the lubricant flowing down from the supply hole Lead to the first rotary electric machine, when climbing a slope, the lubricant oil flowing down from the supply hole, characterized in that it is configured to direct to the second rotary electric machine.

With this configuration, in the lubricating structure for a rotating electric machine according to the present invention, when the vehicle travels on a flat road where the vehicle travels on a flat road, the lubricating oil flowing down from the supply hole of the lubricating oil receiving portion is caused to flow through the first lubricating oil guide member. Since it is guided to the rotating electrical machine, the first rotating electrical machine is actively cooled by the lubricating oil when traveling on a flat road.
Further, when traveling on an uphill road where the vehicle runs on an uphill road, the lubricating oil flowing down from the supply hole of the lubricating oil receiving portion is guided to the second rotating electrical machine by the lubricating oil guide member. The second rotating electrical machine is actively cooled by the lubricating oil.

  In the lubricating structure for a rotating electrical machine according to (1) above, (2) the lubricant guide member extends in the vehicle front-rear direction, and a front end portion of the lubricant guide member in the vehicle front-rear direction is located below the supply hole. The rear end portion of the lubricant guide member in the vehicle front-rear direction is located near the outer periphery of the second rotating electrical machine.

With this configuration, in the lubrication structure for a rotating electrical machine according to the present invention, when traveling on a flat road, the lubricating oil flowing down from the supply hole of the lubricating oil receiving portion drops down along the front end portion of the lubricating oil guide member, and Lubricating oil is supplied to the one-rotary electric machine.
Further, when traveling on an uphill road, the lubricating oil that flows down from the supply hole of the lubricating oil receiving portion flows along the longitudinal direction of the lubricating oil guide member, and drops downward from the rear end portion of the lubricating oil guide member, thereby causing the second rotation. Lubricating oil will be supplied to the electric machine.

  In the lubricating structure for a rotating electrical machine described in (1) or (2) above, (3) the lubricating oil guide member is formed so as to form a downward gradient from the vehicle front side toward the rear side when traveling on an uphill road. It is characterized by being.

  With this configuration, in the lubricating structure for a rotating electrical machine according to the present invention, the lubricating oil flowing down from the lubricating oil receiving portion quickly travels from the vehicle front side to the rear side in the lubricating oil guide member when traveling on an uphill road. It will be.

  In the lubricating structure for a rotating electrical machine described in (1) to (3) above, (4) the lubricating oil guide member is formed linearly when viewed from the vehicle width direction.

  With this configuration, in the lubricating structure for a rotating electrical machine according to the present invention, the lubricating oil flowing down from the lubricating oil receiving portion flows smoothly from the vehicle front side to the rear side in the lubricating oil guide member when traveling on the uphill road. It will be.

  In the lubricating structure for a rotating electrical machine described in (1) to (4) above, (5) the lubricating oil guide member is formed in a bowl shape when viewed from the vehicle front-rear direction.

  With this configuration, in the lubricating structure of the rotating electrical machine according to the present invention, the lubricating oil flowing down from the lubricating oil receiving portion during running on the uphill road does not spill from the vehicle front side to the rear side in the lubricating oil guide member. Will flow.

  According to the present invention, the lubricating oil flowing down from the supply hole of the lubricating oil receiving portion when traveling on the uphill road is guided to the second rotating electrical machine by the lubricating oil guide member. It is possible to provide a lubricating structure for a rotating electrical machine that can improve the cooling effect of the rotating electric machine.

It is sectional drawing which shows the principal part in the drive device of the vehicle to which the lubrication structure of the rotary electric machine which concerns on embodiment of this invention is applied, and represents the time of flat road driving | running | working. 2A is a partial plan view showing the relationship between the partition wall, the supply hole, and the lubricant guide member, and FIG. 2B is a partial cross-section showing the relationship between the partition wall, the supply hole, and the lubricant guide member. FIG. It is a block diagram which shows the principal part in the drive device of the vehicle to which the lubrication structure of the rotary electric machine which concerns on embodiment of this invention is applied, and represents the time of an uphill road driving | running | working. FIG. 4A shows a first modification of the lubricating structure of the rotating electrical machine according to the embodiment of the present invention, and FIG. 4A is a partial plan view showing the relationship between the partition walls, the supply holes, and the lubricating oil guide member. (B) is a fragmentary sectional view showing the relation of a partition, a supply hole, and a lubricant guide member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
1 to 3 show a hybrid vehicle drive device 10 to which a lubricating structure for a rotating electrical machine according to an embodiment of the present invention is applied. The arrow F indicates the front of the vehicle, the arrow R indicates the rear of the vehicle, the arrow U indicates the upper side of the vehicle, and the arrow L indicates the lower side of the vehicle.
The driving device 10 includes a first rotating electrical machine MG1 that is a motor generator, a second rotating electrical machine MG2 that is a motor generator, a case 1, a gear mechanism 2, a lubricant receiving portion 3, and a lubricant guide member 4. I have.

The first rotating electrical machine MG1 mainly plays a role of charging a battery and supplying power for driving to the second rotating electrical machine MG2.
The second rotating electrical machine MG2 is mainly operated by electric power supplied from the battery or the first rotating electrical machine MG1, and plays a role of driving the wheels.
Each of the first rotating electrical machine MG1 and the second rotating electrical machine MG2 has a rotor shaft that extends horizontally in the vehicle width direction.

The case 1 has a partition wall 1a extending in the vehicle front-rear direction. The partition 1a divides the inside of the case 1 into a rotating electrical machine chamber 1b and a gear mechanism chamber 1c as shown in FIG. That is, the rotating electrical machine chamber 1b and the gear mechanism chamber 1c are arranged in the vehicle width direction.
An opening penetrating in the vehicle width direction is provided in the lower portion of the partition wall 1a, and the lower portion in the rotating electrical machine chamber 1b and the lower portion in the gear mechanism chamber 1c communicate with each other through the opening. It is like that. In the lower part of the case 1, a lubricating oil reservoir 5 is formed over both the rotating electrical machine chamber 1b and the gear mechanism chamber 1c.

The rotating electrical machine chamber 1b houses a first rotating electrical machine MG1 and a second rotating electrical machine MG2.
The first rotating electrical machine MG1 is disposed in the front portion of the rotating electrical machine chamber 1b in the vehicle longitudinal direction, and the second rotating electrical machine MG2 is disposed in the vehicle longitudinal direction rear side portion of the rotating electrical machine chamber 1b. Further, the second rotating electrical machine MG2 is located above the first rotating electrical machine MG1 in the rotating electrical machine chamber 1b.
And the gear mechanism 2 mentioned later is arrange | positioned in the gear mechanism chamber 1c.

  As shown in FIGS. 1 and 3, the gear mechanism 2 includes a counter drive gear 21, a reduction gear 22, a counter driven gear 23, a drive pinion gear 24, and a differential ring gear 25.

The counter drive gear 21 is connected to the output shaft of the engine and the rotor shaft of the first rotating electrical machine MG1 via a planetary gear mechanism.
The counter drive gear 21 is located coaxially with the rotor shaft of the first rotating electrical machine MG1. Further, the counter drive gear 21 is configured to rotate integrally with the ring gear in the planetary gear mechanism.
The engine output shaft is configured to rotate integrally with the carrier in the planetary gear mechanism, and the rotor shaft of the first rotating electrical machine MG1 is configured to rotate integrally with the sun gear in the planetary gear mechanism. Yes.
As a result, the engine output is divided and input to the counter drive gear 21 and the first rotating electrical machine MG1.

The reduction gear 22 is positioned coaxially with the rotor shaft of the second rotating electrical machine MG2, and is configured to rotate integrally with the rotor shaft of the second rotating electrical machine MG2.
The counter driven gear 23 is located between the counter drive gear 21 and the reduction gear 22 and meshes with both the counter drive gear 21 and the reduction gear 22.
The drive pinion gear 24 is positioned coaxially with the counter driven gear 23 and is configured to be able to rotate integrally with the counter driven gear 23.

The differential ring gear 25 is positioned below the drive pinion gear 24 and meshes with the drive pinion gear 24. The differential ring gear 25 is connected to the drive wheel via a differential mechanism, and rotates in the direction of arrow A as shown in FIGS. 1 and 3 in conjunction with the rotation of the drive wheel.
Further, a part of the differential ring gear 25 is soaked in a lubricating oil reservoir 5 formed in the lower part of the gear mechanism chamber 1c. For this reason, when the differential ring gear 25 rotates in the direction of the arrow A, the splash of the lubricating oil from the lubricating oil reservoir 5 extends along the rear inner surface 1d of the case 1 as shown by the arrow B in FIGS. It can be lifted up to the upper part in the chamber 1c.
Further, the splash of the lubricating oil that is swept up from the lubricating oil reservoir 5 in the direction of arrow B by the differential ring gear 25 is a concave curved corner inner surface interposed between the rear inner surface 1d and the top inner surface 1e in the case 1. The direction of the flow is changed to the vehicle front side by 1f.

The lubricating oil receiving part 3 is located in the upper part in the gear mechanism chamber 1c.
The lubricating oil receiving portion 3 is formed by a partition wall 1a in the case 1, a rib 3a protruding from the partition wall 1a in the vehicle width direction, and a top inner surface 1e in the case 1, and below the rib 3a in the gear mechanism chamber 1c. Separated from the space in which it is located.
When viewed in the vehicle width direction, the rib 3a has a shape that is recessed near the top of the first rotating electrical machine MG1 in the vehicle longitudinal direction.
Further, a lubricating oil inlet 3b is formed between the rear side portion of the rib 3a in the vehicle front-rear direction and the top inner surface 1e of the case 1. Thereby, the splashes of the lubricating oil whose direction of flow is changed at the corner inner surface 1f in the case 1 described above flow into the lubricating oil receiving portion 3 through the lubricating oil inlet 3b. And in the lubricating oil receiving part 3, lubricating oil flows toward the location which is the shape which became depressed in the rib 3a mentioned above.

  As shown in FIG. 2, a supply hole 3 c penetrating in the vehicle width direction is formed in the partition wall 1 a forming the lubricating oil receiving portion 3. As shown in FIGS. 1 and 3, the supply hole 3 c is located above the first rotating electrical machine MG <b> 1, that is, a portion that is recessed in the above-described rib 3 a. As a result, the lubricating oil flows from the lubricating oil receiving portion 3 located on the gear mechanism chamber 1c side into the rotating electrical machine chamber 1b through the supply hole 3c.

The lubricant guide member 4 is provided in the rotating electrical machine chamber 1b.
The lubricating oil guide member 4 guides the lubricating oil flowing down from the lubricating oil receiving portion 3 into the rotating electrical machine chamber 1b through the supply hole 3c to the first rotating electrical machine MG1 when the vehicle travels on a flat road. It comes to play a role.
Further, the lubricating oil guide member 4 allows the second rotating electrical machine to flow the lubricating oil flowing down from the lubricating oil receiving portion 3 into the rotating electrical machine chamber 1b through the supply hole 3c when the vehicle travels on an uphill road. It is supposed to play a role leading to MG2.

The lubricating oil guide member 4 is integrated with the partition wall 1a in the case 1 and extends linearly in the vehicle front-rear direction as shown in FIGS. 1 and 3 when viewed in the vehicle width direction.
As shown in FIG. 1, the lubricating oil guide member 4 is substantially horizontal in the vehicle front-rear direction as shown in FIG. 1, and as shown in FIG. It is formed so as to form a downward slope toward the rear side.
For example, when the vehicle travels on a road having an upward slope of 5 degrees with respect to the horizontal, the lubricant guide member 4 forms a downward slope of 5 degrees with respect to the horizontal from the vehicle front side to the rear side. It is like that.
That is, the angle of the downward gradient from the vehicle front side to the rear side formed by the lubricant guide member 4 changes in proportion to the change in the angle of the upward gradient of the road on which the vehicle travels.
The front end portion of the lubricant guide member 4 in the vehicle front-rear direction is located below the supply hole 3c formed in the partition wall 1a, and the rear end portion of the lubricant guide member 4 in the vehicle front-rear direction is the second rotation. It is located near the outer periphery of the electric machine MG2.

The relative position between the supply hole 3c drilled in the partition wall 1a and the front end portion of the lubricating oil guide member 4 in the vehicle front-rear direction is almost equal to that in the vehicle front-rear direction as shown in FIG. In a horizontal state, that is, when traveling on a flat road, almost the entire amount of the lubricating oil flowing from the lubricating oil receiving portion 3 through the supply hole 3c into the rotating electrical machine chamber 1b travels along the front end portion of the lubricating oil guide member 4. It is set to drip downward and to be supplied to the first rotating electrical machine MG1.
Further, the relative position between the supply hole 3c drilled in the partition wall 1a and the front end portion of the lubricant guide member 4 in the vehicle front-rear direction is such that the lubricant guide member 4 is located on the vehicle front side as shown in FIG. In the state of making a downward slope from the rear side to the rear side, that is, when traveling on an uphill road, a part of the lubricating oil flowing down from the lubricating oil receiving portion 3 into the rotating electrical machine chamber 1b through the supply hole 3c is shown by an arrow in FIG. As indicated by C, it is set so as to flow from the front end portion of the lubricant guide member 4 along the longitudinal direction of the lubricant guide member 4.
Furthermore, the relative position between the rear end portion of the lubricant guide member 4 in the vehicle front-rear direction and the second rotating electrical machine MG2 is such that the lubricant flowing along the longitudinal direction of the lubricant guide member 4 is the lubricant oil. It is set so as to drip downward from the rear end portion of the guide member 4 and to be supplied to the second rotating electrical machine MG2.

Next, the operation of the drive device 10 to which the lubricating structure for a rotating electrical machine according to the present embodiment is applied will be described.
When the vehicle travels, the differential ring gear 25 rotates in the direction of arrow A.
A portion of the differential ring gear 25 is immersed in the lubricating oil reservoir 5 formed in the lower portion of the gear mechanism chamber 1c. Therefore, when the differential ring gear 25 rotates in the direction of arrow A, the lubricating oil splashes from the lubricating oil reservoir 5. However, as represented by the arrow B, along the rear inner surface 1d of the case 1, it is lifted up to the upper part in the gear mechanism chamber 1c.
The splashes of the lubricating oil swept up from the lubricating oil reservoir 5 in the direction of the arrow B by the differential ring gear 25 are caused by the concave curved corner inner surface 1f interposed between the rear inner surface 1d and the top inner surface 1e in the case 1. Change the flow direction to the front side of the vehicle.
Due to the corner inner surface 1f of the case 1, the splash of the lubricating oil whose direction of flow has changed flows into the lubricating oil receiving portion 3 located in the upper part in the gear mechanism chamber 1c via the lubricating oil inlet 3b. . Then, in the lubricating oil receiving portion 3, the lubricating oil flows toward the portions that are recessed in the rib 3a.

The lubricating oil that has entered the lubricating oil receiver 3 located on the gear mechanism chamber 1c side flows down into the rotating electrical machine chamber 1b through the supply hole 3c.
When the vehicle travels on a flat road where the vehicle travels on a flat road, the lubricant guide member 4 is substantially horizontal in the vehicle longitudinal direction as shown in FIG. After that, almost the entire amount of the lubricating oil flowing down into the rotating electrical machine chamber 1b drops downward along the front end portion of the lubricating oil guide member 4, and is supplied to the first rotating electrical machine MG1.
Therefore, when traveling on a flat road, the first rotating electrical machine MG1 that mainly plays the role of charging the battery and supplying the driving power to the second rotating electrical machine MG2 is actively cooled by the lubricating oil. It will be.

When the vehicle travels on a downhill road where the vehicle travels on a downward slope road, the lubricant guide member 4 is in a state of forming a linear downward slope from the vehicle rear side to the front side. After that, almost the entire amount of the lubricating oil flowing down into the rotating electrical machine chamber 1b drops downward along the front end portion of the lubricating oil guide member 4, and is supplied to the first rotating electrical machine MG1.
Accordingly, when traveling downhill, the first rotating electrical machine MG1 that mainly plays the role of charging the battery and supplying the driving power to the second rotating electrical machine MG2 is actively cooled by the lubricating oil. It will be.

When the vehicle travels on an uphill road where the vehicle travels on an uphill road, the lubricating oil guide member 4 is in a state of forming a linear downward slope from the vehicle front side to the rear side as shown in FIG. As shown by the arrow C, almost the entire amount of the lubricating oil flowing from the receiving portion 3 through the supply hole 3c and into the rotating electrical machine chamber 1b extends from the front end portion of the lubricating oil guide member 4 in the longitudinal direction of the lubricating oil guide member 4. Along with this, the lubricating oil flows quickly without stagnation, and this lubricating oil is set to drip downward from the rear end portion of the lubricating oil guide member 4 and supplied to the second rotating electrical machine MG2.
Therefore, when traveling on an uphill road, the second rotating electrical machine MG2 that operates mainly by the power supplied from the battery or the first rotating electrical machine MG1 and plays the role of driving the wheels is actively cooled by the lubricating oil. Will be.
Thereby, the cooling effect of the second rotating electrical machine MG2 by the lubricating oil can be improved during traveling on an uphill road where the amount of heat generated by the second rotating electrical machine MG2 increases.

In the embodiment shown in FIGS. 1 to 3, the lubricating oil guide member 4 is substantially horizontal in the vehicle longitudinal direction when traveling on a flat road as viewed in the vehicle width direction, and when traveling on an uphill road. The lubricant guide member 4 forms a downward gradient from the vehicle front side to the rear side.
However, the relative positions of the case 1 and the lubricant guide member 4 are not limited to this.
For example, when traveling on a flat road, the lubricant guide member 4 has a downward slope from the rear side to the front side of the vehicle, and the vehicle travels on a road having an upward slope of 3 degrees with respect to the horizontal. In addition, the lubricating oil guide member 4 may be configured to be substantially horizontal in the vehicle front-rear direction.
When such a configuration is adopted, when the vehicle travels on any one of a downhill road, a flat road, and a road having an uphill gradient of 3 degrees or less with respect to the horizontal, the first rotating electrical machine MG1. When the vehicle travels on a road having an upward slope exceeding 3 degrees with respect to the horizontal, the lubricating oil is supplied to the second rotating electrical machine MG2. .
That is, based on the relative position between the case 1 and the lubricant guide member 4, the angle of the upward slope at which the lubricant is supplied to the second rotating electrical machine MG2 can be selected.

(Modification 1)
FIG. 4 shows a lubricating oil guide member 4A to which the first modification of the lubricating oil guide member 4 in the lubricating structure of the rotating electrical machine according to the embodiment of the present invention is applied, and is the same as FIGS. 1 to 3 in the figure. The part which attached | subjected the code | symbol represents the same thing.

The lubricant guide member 4A is provided in the rotating electrical machine chamber 1b.
The lubricating oil guide member 4A performs the first rotation shown in FIG. 1 when lubricating oil flows down from the lubricating oil receiving portion 3 into the rotating electrical machine chamber 1b through the supply hole 3c when the vehicle travels on a flat road. It plays a role leading to the electric machine MG1.
Further, the lubricating oil guide member 4A shows lubricating oil that flows down from the lubricating oil receiving portion 3 into the rotating electrical machine chamber 1b through the supply hole 3c when the vehicle travels on an uphill road as shown in FIG. It plays a role leading to the second rotating electrical machine MG2.

The lubricating oil guide member 4A is attached to the partition wall 1a in the case 1 and, when viewed in the vehicle width direction, extends linearly in the vehicle longitudinal direction, similar to the lubricating oil guide member 4 shown in FIGS. .
The side edge portion of the lubricating oil guide member 4A is provided with a wall portion 4a protruding upward over the entire length in the longitudinal direction of the lubricating oil guide member 4A. When the lubricating oil guide member 4A is viewed from the vehicle front-rear direction, It is formed in a bowl shape.
The lubricating oil guide member 4A is substantially horizontal in the vehicle front-rear direction when running on a flat road, as in the lubricating oil guide member 4 shown in FIG. 1, and the lubricating oil shown in FIG. Similar to the guide member 4, the guide member 4 is formed to have a downward gradient from the vehicle front side to the rear side.
The front end portion of the lubricant guide member 4A in the vehicle front-rear direction is located below the supply hole 3c formed in the partition wall 1a, and the rear end portion of the lubricant guide member 4A in the vehicle front-rear direction is shown in FIG. Similar to the lubricating oil guide member 4 shown in FIG. 3, it is located in the vicinity of the outer peripheral portion of the second rotating electrical machine MG2.

  In the lubricating oil guide member 4A shown in FIG. 4, the wall portion 4a is provided at the side edge portion of the lubricating oil guide member 4A, so that the lubricating oil flowing down from the lubricating oil receiving portion 3 during the traveling on the uphill road is guided by the lubricating oil guide. The member 4A can flow without spilling from the vehicle front side toward the rear side.

  As described above, according to the present invention, when the vehicle travels on an uphill road where the vehicle travels on an uphill road, the lubricating oil flowing down from the supply hole of the lubricating oil receiving portion is supplied to the second rotating electrical machine by the lubricating oil guide member. Since the second rotating electrical machine is cooled, the lubricating effect of the rotating electrical machine that can improve the cooling effect of the second rotating electrical machine when traveling on an uphill road can be provided. Useful for overall structure.

DESCRIPTION OF SYMBOLS 1 Case 3 Lubricating oil receiving part 3c Supply hole 4 Lubricating oil guide member 4A Lubricating oil guide member MG1 1st rotary electric machine MG2 2nd rotary electric machine

Claims (5)

A first rotating electrical machine, a second rotating electrical machine, a case that houses the first rotating electrical machine and the second rotating electrical machine, a lubricant receiving portion, and a lubricant guide member,
A lubricating structure of a rotating electrical machine capable of supplying lubricating oil to the first rotating electrical machine and the second rotating electrical machine,
The first rotating electrical machine is disposed in a front portion of the vehicle in the front-rear direction within the case,
The second rotating electrical machine is disposed in a rear portion of the vehicle front-rear direction in the case,
The lubricating oil receiver is located in the upper part of the case,
The lubricating oil receiving portion has a supply hole for flowing lubricating oil toward the first rotating electrical machine,
The lubricating oil guide member is provided in the case,
The lubricating oil guide member guides the lubricating oil flowing down from the supply hole to the first rotating electrical machine when traveling on a flat road, and causes the lubricating oil flowing down from the supply hole to travel to the second rotating electrical machine when traveling on an uphill road. A lubricating structure for a rotating electrical machine, characterized in that it is configured to guide to The lubricating oil guide member extends in the vehicle longitudinal direction,
A front end portion of the lubricant guide member in the vehicle front-rear direction is located below the supply hole,
2. The lubricating structure for a rotating electrical machine according to claim 1, wherein a rear end portion of the lubricating oil guide member in a vehicle front-rear direction is positioned in the vicinity of an outer peripheral portion of the second rotating electrical machine.   3. The rotating electrical machine according to claim 1, wherein the lubricant guide member is formed to have a downward slope from the front side of the vehicle toward the rear side when traveling on an uphill road. Lubrication structure.   The lubricating structure for a rotating electrical machine according to any one of claims 1 to 3, wherein the lubricating oil guide member is formed linearly when viewed from the vehicle width direction.   The lubricating structure for a rotating electrical machine according to any one of claims 1 to 4, wherein the lubricating oil guide member is formed in a bowl shape when viewed from the front-rear direction of the vehicle.

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