JP2016032380A - Oil scraper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil scraper capable of ensuring oil scraping performance even during high speed rotation.SOLUTION: In an oil scraper including a case 2 for housing a rotor 11 and a drive shaft 12 rotated by means of a motor 1, an oil reservoir 21 provided in the case 2 and storing lubricant, and an oil scrape member 3 rotated integrally with the rotor 11 and drive shaft 12, and scraping the lubricant stored in the oil reservoir 21 into the case, during rotation, by the tip in the outer diameter direction, i.e., the outer peripheral tip 31, an entrainment suppression member 4 for guiding the air flows Ar1, Ar2, flowing into the oil reservoir 21 together with the outer peripheral tip 31 during rotation of the oil scrape member 3, in a direction separating from the oil scrape member 3 is installed at the oil level OL1 position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an oil scooping device that scoops up oil in a case using an oil scooping member that rotates integrally with a rotating body.

2. Description of the Related Art Conventionally, an oil scooping device that cools and lubricates a driving device by scooping up oil stored in a lower portion of the case of the driving device using an oil scooping member that rotates integrally with a rotor of a motor is known (for example, , See Patent Document 1).
In this prior art, an oil scooping member that rotates integrally with the rotor is provided, and this scooping member extends in an outer diameter direction on one side portion in the axial direction with respect to the stator rather than a surface facing the rotor of the stator. Are arranged.

JP 2011-120417 A

  However, in the above prior art, if the end surface in the outer radial direction of the oil scooping member is separated from the outer peripheral surface in the radial direction on the case side in the vicinity of the oil level, the airflow above the oil surface is transferred to the oil during high-speed rotation. There was a risk that the oil surface would be rippled and the oil would not be sufficiently raked up.

  The present invention has been made paying attention to the above problem, and an object of the present invention is to provide an oil scooping device that can ensure oil scooping performance even at high speed rotation.

  In order to achieve the above-mentioned object, the present invention suppresses the entrainment that guides the airflow toward the oil reservoir together with the tip of the oil scraping member in the direction away from the oil scraping member when the oil scraping member rotates. The member was installed within a predetermined distance in the vertical direction from the oil level position or the oil level position.

  In the oil scooping device according to the present invention, when the oil scooping member rotates, the air flow toward the oil storage part together with the tip of the oil scooping member is caused by the entrainment suppressing member in the vertical direction from the oil level position or the oil level position. Guided in a direction away from the oil scooping member at a position within a predetermined distance. Therefore, it is possible to prevent the air surface from being swollen under the oil level and to suppress the oil surface from being swollen, and to suppress the shortage of oil scooping caused by this wavy, and to ensure the oil scooping performance even at high speed rotation. .

It is sectional drawing of the drive unit provided with the oil scraping apparatus of Embodiment 1, and shows the cross section in the S1-S1 line of FIG. It is a front view which shows the internal structure of the drive unit provided with the oil scooping apparatus of Embodiment 1, and has shown the state seen from the arrow Y2 direction of FIG. It is a perspective view which shows the entrainment suppression member of the oil scooping device of Embodiment 1. It is sectional drawing which shows the entanglement suppression member of the oil scraping apparatus of Embodiment 1. FIG. It is explanatory drawing of a comparative example with the oil scooping apparatus of Embodiment 1. FIG. It is sectional drawing of the drive unit provided with the oil scooping apparatus of Embodiment 2, and shows the cross section in the S6-S6 line of FIG. It is a front view which shows the internal structure of the drive unit provided with the oil scooping apparatus of Embodiment 2, and has shown the state seen from the arrow Y7 direction of FIG. FIG. 5 is a cross-sectional view of a drive unit that includes the oil scooping device according to Embodiment 3. FIG. 10 is a plan view showing a roll-in suppressing member in the oil scooping device according to the third embodiment.

Hereinafter, the best mode for realizing the oil scraping device of the present invention will be described based on the embodiments shown in the drawings.
(Embodiment 1)
First, the configuration of the oil scooping device according to the first embodiment will be described.
The oil scooping device according to Embodiment 1 is installed in drive unit A shown in FIGS. 1 and 2. 1 is a longitudinal sectional view of the drive unit A (cross section taken along the line S1-S1 in FIG. 2), and FIG. 2 shows the internal structure of the drive unit A as viewed from the direction of arrow Y2 in FIG. It is a front view.
This drive unit A is used, for example, to drive vehicle drive wheels (not shown) as an in-wheel motor used in electric vehicles and hybrid vehicles.

The drive unit A includes a case 2 that houses a rotor 11 and a drive shaft 12 that are rotated by a motor 1 as a case that houses a rotating body that is rotated by a drive device.
In addition, a stator 13 that applies a rotational force to the rotor 11 is provided on the inner periphery of the case 2 in a circumferential shape.
The motor 1 is a brushless type, and a DC motor, a synchronous type, an induction type AC motor, or the like can be used. The drive shaft 12 is connected to the drive wheel directly or indirectly.
In FIG. 2, an arrow FR indicates a rotation direction when the vehicle moves forward. Hereinafter, this is referred to as forward rotation, and the reverse direction is referred to as reverse rotation.

In the lower part of the case 2, in addition to cooling the stator 13, there is provided an oil storage portion 21 that stores lubricating oil used for lubricating a bearing (not shown).
That is, the case 2 includes disk-shaped outer portions 22 and 23 and a cylindrical outer peripheral portion 24 as shown in FIG. Therefore, the lubricating oil filled in the case 2 is stored in the oil storage portion 21 at the bottom thereof by its own weight. In FIG. 1 and FIG. 2, the oil level OL <b> 1 in a stationary state is indicated by a two-dot chain line, and the height thereof is disposed slightly below the lower end of the rotor 11. Further, in the case 2, the upper part of the oil reservoir 21 is referred to as a case internal space 25.

An oil scooping member 3 that scoops up oil stored in the oil storage unit 21 when the rotor 11 rotates is attached to the drive shaft 12.
The oil scooping member 3 is formed in a substantially disc shape, and is disposed with an interval in the axial direction of the drive shaft 12 with respect to the side surface of the rotor 11, and the outer peripheral tip 31 thereof is the oil surface OL1. It is formed in the outer diameter dimension arrange | positioned below.
Therefore, when the rotor 11 and the drive shaft 12 are rotated, the oil scooping member 3 is rotated integrally therewith and the lubricating oil is scooped up at the outer peripheral tip 31. Therefore, it is preferable that the outer peripheral tip 31 is provided with unevenness, grooves, slits, and the like for scraping the lubricating oil, as in Patent Document 1.

Further, in the oil storage unit 21, the entrainment suppressing member is disposed in a portion where the oil scooping member 3 enters the lubricating oil when the rotor 11 rotates forward and a portion where the oil scooping member 3 enters the lubricating oil during the reverse rotation. 4 is provided. In addition, these entanglement suppressing members 4 and 4 are each attached to the case 2.
The entrainment suppressing member 4 guides the airflow toward the oil reservoir 21 in the direction away from the oil scooping member 3 when the oil scooping member 3 rotates, and follows the rotational direction of the oil scooping member 3. Thus, it extends from a position above the oil level OL1 to a position below the oil level OL1. In the first embodiment, the entrainment suppressing member 4 is disposed below the oil level OL1 at least half of its extending direction.

As shown in FIG. 1 and FIG. 3, the entrainment suppressing member 4 is oil scraped by a pair of parallel side piece portions 41, 41 and a bottom portion 42 that connects the side piece portions 41, 41 at the outer periphery. It is formed in the concave cross-sectional shape which surrounds the groove part 43 through which the outer periphery front-end | tip part 31 of the raising member 3 passes.
Further, as shown in FIG. 3, the entrainment suppressing member 4 includes a stepped portion 44 on the side piece portion 41 that faces the side surface of the outer peripheral tip portion 31 of the oil scraping member 3. The step portion 44 is formed by changing the plate thickness of the side piece portion 41 so that the groove width of the groove portion 43 is wide on the upstream side in the forward rotation direction of the oil scraping member 3 and narrows on the downstream side. ing. By the step portion 44, guide surfaces 44 a and 44 a extend in the direction orthogonal to the rotation direction of the oil scooping member 3 and in the radial direction of the rotor 11. FIG. 4 is an arrow view of the entrainment suppressing member 4 as viewed from the direction of the arrow SE in FIG. 2, which is the upstream side of the rotational direction when the oil scooping member 3 is rotated forward. The guide surfaces 44a and 44a are raised.

  As shown in FIG. 2, the guide surface 44 a extends in the direction of the rotation center of the rotor 11, and the oil surface OL <b> 1 is the most used rotation region from the illustrated stationary height. It is arranged so as to overlap in the range of the height. Therefore, when the height of the oil surface OL1 in the most used rotation region is lower than that of the first embodiment, the guide surface 44a of the entanglement suppressing member 4 arranged on the right side in FIG. It is arranged at a position in the clockwise direction.

  In addition, in the entrainment suppressing member 4 installed on the side where the oil scooping member 3 enters the oil level OL1 when the oil scooping member 3 rotates in the reverse direction, the wide side of the groove 43 is upstream of the rotation (see FIG. 2 on the left side).

(Operation of Embodiment 1)
Next, the operation of the first embodiment will be described. First, the operation of the comparative example in which the entrainment suppressing member 4 is not provided will be described with reference to FIG.

When the oil scooping member 3 rotates with the rotation of the rotor 11, the lubricating oil in the oil reservoir 21 is scooped up in the direction indicated by the arrow OL2.
Further, during the rotation of the rotor 11, an airflow Ar0 that moves along the oil scooping member 3 is generated in the air in the case internal space 25, and this airflow Ar0 is combined with the scooping member 3 to the oil level OL <b> 1. It is caught below.

In particular, when the rotor 11 and the oil scooping member 3 rotate at a high speed, the amount of entrainment by the air flow Ar0 increases, and the oil surface OL1 has a wave as shown by a dotted line in the drawing.
Further, when the rotor 11 and the oil scooping member 3 rotate at a high speed, the amount of lubricating oil scooped up and the oil level OL1 decreases. Therefore, when the oil level OL1 is lowered and a wave as shown by the dotted line occurs, the immersion area in the lubricating oil on the scraping side of the outer peripheral tip portion 31 of the oil scraping member 3 is reduced, and the amount of scraping is increased. There was a risk of decline.

On the other hand, in the first embodiment in which the entrainment suppressing member 4 is provided, the airflows Ar <b> 1 and Ar <b> 2 generated along the outer peripheral tip 31 of the oil scraping member 3 as the oil scraping member 3 rotates are indicated by arrows. As shown in FIG. 4, the end face 45 and the guide surface 44a of the curbing suppression member 4 collide with each other. As a result, the airflows Ar1 and Ar2 are guided in the direction away from the oil scooping member 3 while changing their direction in the direction of the rotation center of the rotor 11 along the end surface 45 and the guide surface 44a as indicated by arrows.
Therefore, the airflow generated along the outer peripheral tip 31 of the oil scooping member 3 is less likely to be caught below the oil level OL1, and the oil surface OL1 undulates due to the airflow being caught below the oil level OL1. Is also suppressed.
Thereby, the oil scooping member 3 is immersed in the lubricating oil, and the oil scooping (arrow OL2) can be performed more stably than in the comparative example.

Further, when the rotation of the rotor 11 becomes high, the amount of oil scooped up increases and the oil level OL1 decreases. Even in this case, the guide surface 44a is disposed so as to be the height of the oil surface OL1 in the rotational frequency range where the frequency of use is the highest.
Therefore, in the rotational frequency range where the frequency of use is the highest, the guide surface 44a guides the airflow in the direction away from the oil scooping member 3, and suppresses the ripple of the oil surface OL1 as described above, so that it is stable. Oil can be raked up.
Therefore, even when the rotor 11 rotates and the oil level OL1 decreases, the oil scooping member 3 can stably perform the oil scooping.

Furthermore, in the wrap-up suppressing member 4 (disposed on the left side in FIG. 2) on the side where the outer peripheral tip 31 of the oil scooping member 3 protrudes from the oil surface OL1 to the case internal space 25 during forward rotation, the groove portion The groove width of 43 is wider on the side closer to the oil level OL1 than on the far side.
Therefore, the lubricating oil scraped up along the groove 43 by the oil scraping member 3 is diffused past the stepped portion 44, and a higher scooping performance than that having a constant groove width can be obtained.
The entrainment suppressing member 4 is installed on both the side where the outer peripheral tip 31 of the oil scooping member 3 enters the oil surface OL1 during forward rotation and the side where the outer peripheral tip 31 enters during reverse rotation. Therefore, the above action can be obtained both when the rotor 11 is rotating forward and when it is rotating backward.

(Effect of Embodiment 1)
The effects of the oil scooping device according to Embodiment 1 are listed below.
1) The oil scooping device of Embodiment 1 is
A case 2 housing a rotor 11 and a drive shaft 12 as a rotating body rotated by a motor 1 as a drive device;
An oil storage portion 21 provided in the case 2 for storing lubricating oil;
Lubricating oil stored in the oil storage portion 21 is scraped into the case 2 at the outer peripheral tip 31 that is rotated integrally with the rotor 11 and the drive shaft 12 as the rotating body and is rotated in the outer diameter direction. An oil scraping member 3;
An oil scraping device comprising:
When the oil scooping member 3 rotates, the entrainment suppressing member 4 that guides the airflows Ar1 and Ar2 heading into the oil reservoir 21 together with the outer peripheral tip 31 in the direction away from the oil scooping member 3, It is characterized by being installed within a predetermined distance in the vertical direction from the position of the oil surface OL1 as the liquid level of the lubricating oil or the position of the oil surface OL1.
Therefore, when the oil scooping member 3 rotates, the air flow toward the oil reservoir 21 together with the outer peripheral tip 31 of the oil scooping member 3 is guided in a direction away from the oil scooping member 3 by the entrainment suppressing member 4. The Therefore, the airflow above the oil level OL1 is restrained from being entrained in the lubricating oil, and the oil surface OL1 is prevented from undulating, and the occurrence of the phenomenon that the oil is not sufficiently raised due to this undulation can be suppressed. It is possible to ensure oil scooping performance even during rotation.
In addition, the installation position of the entrainment suppressing member 4 is not limited to the oil surface OL1 position, as long as it is possible to suppress a reduction in drawing performance due to entrainment of the airflow into the lubricating oil as described above. To some extent, it may be higher and lower than the oil level OL1 in the vertical direction.

2) The oil scooping device of Embodiment 1 is
The entrainment suppressing member 4 is formed in a concave cross-sectional shape surrounding both side surfaces and the front end surface of the outer peripheral front end portion 31 of the oil scraping member 3.
Therefore, the air flow toward the oil reservoir 21 along the both side surfaces and the outer peripheral surface of the outer peripheral tip portion 31 of the oil scooping member 3 is surely moved away from the oil scooping member 3 by the entrainment suppressing member 4. I can guide you.
Therefore, the effect 1) can be obtained more reliably.

3) The oil scooping device of Embodiment 1 is
A guide surface 44 a extending in a direction intersecting the rotational direction of the oil scraping member 3 is provided on the side piece portion 41 that is a surface facing the side surface of the oil scraping member 3 of the winding restraining member 4. A step 44 is formed.
Therefore, the air flow that travels toward the oil reservoir 21 together with the outer peripheral tip 31 of the oil scooping member 3 is scooped up in two stages of the end (end surface 45) of the oil scooping member 3 and the stepped portion 44. It is possible to guide in a direction away from the member 3.
In particular, when the rotor 11 is rotated, when the lubricating oil is scraped, the amount of lubricating oil in the oil reservoir 21 is reduced by the amount of the scraped oil and the oil level OL1 is lowered. It arrange | positions at the height of the oil surface OL1 of the rotation speed area with high use frequency.
Thus, when the oil level OL1 is lowered in the frequently used rotation speed range, the airflow is surely separated from the oil scooping member 3 at the height of the oil level OL1 and orthogonal to the rotation direction. You can guide in the direction you want. Thereby, the effect 1) can be obtained more reliably.

4) The oil scooping device of Embodiment 1 is
The entrainment suppressing member 4 extends from a position above the oil surface OL1 of the lubricating oil to a position below the oil surface OL1 along the rotation direction of the oil scraping member 3, and extends in the rotation direction thereof. More than half of the length is arranged below the oil level OL1 when not rotating.
Therefore, even when the oil scooping member 3 scoops up the lubricating oil and the oil level OL1 is lowered, it is ensured that the air flow traveling along with the outer peripheral tip 31 of the oil scooping member 3 enters the oil reservoir 21. Can be suppressed.
Further, at the portion where the entrainment suppressing member 4 is immersed in the lubricating oil, the lubricating oil can be reliably held along the oil scooping member 3 so that the entrainment of the lubricating oil is promoted and the oil scooping performance is improved. Can do.

5) The oil scooping device of Embodiment 1 is
The entrainment suppressing member 4 is disposed at a position where the outer peripheral tip 31 of the oil scooping member 3 enters the lubricating oil when the rotor 11 and the drive shaft 12 as the rotating body are rotated forward, and the rotating body rotates in reverse. It is characterized in that it is provided at a position where the outer peripheral tip 31 of the oil scooping member 3 sometimes enters the lubricating oil.
Therefore, in both cases of the forward rotation and the reverse rotation of the rotor 11 and the drive shaft 12 as the rotating body, the ripple of the lubricating oil due to the airflow flowing along the oil scraping member 3 is suppressed, so The scraping performance can be secured.
Further, the entrainment suppressing member 4 disposed on the side where the oil scooping member 3 exits from the oil surface OL1 to the in-case space 25 can further promote the improvement of the lubricating oil scooping performance of the above 4).

(Other embodiments)
Next, an oil scooping device according to another embodiment will be described.
In the description of the other embodiments, the same reference numerals as those in the first embodiment are assigned to the same components as those in the first embodiment, and the description thereof is omitted. Only the differences from the first embodiment will be described. .

(Embodiment 2)
Based on FIG. 6, FIG. 7, the oil scooping apparatus of Embodiment 2 is demonstrated.
6 is a longitudinal sectional view (cross section taken along the line S6-S6 in FIG. 7) of the drive unit provided with the oil scooping device according to the second embodiment, and FIG. 7 is viewed from the direction of arrow Y7 in FIG. It is the front view which shows the internal structure of the said drive unit.

The second embodiment is an example in which the stator 13 is used as a part of the entrainment suppressing member.
As shown in FIG. 6, the winding suppression member 204 is formed in an L-shaped cross-sectional shape by a side piece portion 241 and a bottom portion 242, and is attached to the case 2 as in the first embodiment. . The winding restraining member 204 is formed in a concave shape having a groove 243 similar to that of the first embodiment, with the axial end of the bottom 242 being in contact with or close to the side surface of the stator 13.

  Further, in the second embodiment, the entrainment suppressing member 204 is provided only in a portion where the oil scooping member 3 enters the lubricating oil during the forward rotation of the rotor 11. It may also be provided at the entry position of the oil scooping member 3 at the time.

Further, in the second embodiment, the step portion 44 and the guide surface 44a similar to those in the first embodiment are provided in the intermediate portion in the direction along the rotation direction of the rotor 11 in the side piece portion 241 of the entrainment suppressing member 204. Shall. In addition, it can also be set as the structure which does not provide these level | step-difference parts 44 and the guide surface 44a in the side piece part 241. FIG.
Even in the oil scooping device of the second embodiment described above, it is possible to obtain the effects 1) to 4) based on having the same configuration as that of the first embodiment.

(Embodiment 3)
Next, based on FIG. 8, FIG. 9, the oil scooping apparatus of Embodiment 3 is demonstrated.
FIG. 8 is a front view showing the internal structure of the drive unit to which the oil scooping device of the third embodiment is applied, and FIG. 9 is a plan view showing the entrainment suppressing member used in the third embodiment.
The third embodiment is an example in which the entrainment suppressing member 304 is formed in a plate shape. That is, as shown in FIG. 9, the winding suppression member 304 includes a pair of thin plate-like side plate portions 341 and 341 and a thin plate-like connecting plate portion 342 that connects the end portions of the side plate portions 341 and 341. It is formed in a concave shape surrounding the opening 343 and surrounding the outer peripheral tip 31.

Then, as shown in FIG. 8, the entrainment suppressing member 304 is disposed substantially horizontally along the oil surface OL1 at a height near the oil surface OL1 when stationary.
Even in the third embodiment, the entrainment suppressing member 304 is attached to the case 2. FIG. 8 shows an example in which the entrainment suppressing member 304 is installed only on the side where the oil scraping member 3 enters the lubricating oil when the rotor 11 is rotated forward. As in the first embodiment, It may also be installed at a position where the oil scooping member 3 enters the lubricating oil when the rotor 11 rotates in the reverse direction.

Even in the third embodiment configured as described above, during the forward rotation of the rotor 11, the airflow Ar <b> 3 along the outer peripheral tip 31 of the oil scraping member 3 is horizontally directed by the upper surface of the entrainment suppressing member 304. That is, it is guided in a direction away from the oil scooping member 3.
Thereby, similarly to Embodiment 1, it is suppressed that the said airflow is wound in lubricating oil with the outer periphery front-end | tip part 31. FIG. Therefore, the undulation of the lubricating oil due to the entrainment of the airflow is suppressed, and it is possible to suppress the occurrence of a scraping failure caused by the undulation.

Further, when the oil level OL1 is lowered, the entrainment suppressing member 304 is disposed at a position above the oil level OL1, but guides the airflow in a direction away from the oil scooping member 3 before the oil level OL1. By doing so, it is possible to suppress the above-described undulation and to prevent the occurrence of scraping failure.
It should be noted that, when the oil level OL1 is lowered, a similar entrainment suppressing member 304 may be provided in parallel below the illustrated entrainment suppression member 304 so that the same effect is obtained in the vicinity of the oil level OL1. . Thereby, the said effect | action can be acquired more reliably also at the time of an oil level fall.

The effects of the oil scooping device of Embodiment 3 are listed below.
3-1) The oil scraping device of Embodiment 3 is
The roll-in suppressing member 304 is formed in a plate shape.
Therefore, it is possible to reduce the weight of the entrainment suppressing member 304. In addition, the entrainment suppressing member 304 can be manufactured by pressing or the like, and is excellent in manufacturability.

3-2) The oil scraping device of Embodiment 3 is
The entrainment suppressing member 304 is installed at the position of the oil surface OL1 when the rotor 11 and the drive shaft 12 as the rotating body are not rotated.
Therefore, the airflow flowing along the outer peripheral tip 31 of the oil scraping member 3 is guided in the direction away from the oil scraping member 3 by the entrainment suppressing member 304 at a position near the oil surface OL1 when not rotating. Can do. Therefore, the airflow flowing along the outer peripheral tip 31 of the oil scraping member 3 is surely cut off before entering the lubricating oil, and the ripple of the lubricating oil is reliably suppressed, and the scraping caused by this ripple is caused. It is possible to suppress the occurrence of raising failure.
Further, even when the oil level OL1 is lowered, the same effect can be obtained even when the rotor 11 is rotated by guiding the air flow in the direction away from the outer peripheral tip 31 at the height when the oil surface OL1 is not rotating.
In addition, the installation position of the entrainment suppressing member 304 is not limited to the oil level OL1 position to some extent, as long as it is possible to suppress a decrease in the scraping performance due to the entrainment of the airflow into the lubricating oil as described above. The height and the height may be higher than the oil level OL1 in the vertical direction.

  As mentioned above, although the oil scraping apparatus of this invention has been demonstrated based on embodiment, about a specific structure, it is not restricted to this embodiment, The invention which concerns on each claim of a claim Design changes and additions are allowed without departing from the gist.

For example, in the embodiment, the example in which the entrainment suppressing member is installed at the oil level position is shown, but the installation position is not limited to the oil level position. As described in the third embodiment, the installation position may be higher and lower than the oil level in the vertical direction as long as it is possible to suppress the deterioration of the scraping performance due to the entrainment of the airflow into the lubricating oil. Good. That is, even if the installation position of the entrainment suppression member is somewhat higher than the oil level position, the air flow toward the oil storage unit together with the tip of the oil scooping member is separated from the oil scooping member at that position. By guiding in the direction, it is possible to suppress the oil from being caught in the oil by the tip.
Similarly, even if the installation position of the entrainment suppressing member is somewhat lower than the oil level position, the air flow toward the oil storage unit together with the tip of the oil lifting member is By guiding in the away direction, it is possible to suppress the oil from being caught in the oil by the tip. In particular, it becomes more effective when the oil level is lowered with the rotation of the rotating body.
Further, in the embodiment, when guiding the air flow toward the oil reservoir together with the tip of the oil scooping member in the direction away from the oil scooping member, the example is guided in the axial direction and the horizontal direction of the rotating body. Indicated. However, the guiding direction is not limited to those shown in the embodiment as long as the airflow is guided in a direction away from the oil scooping member.

  Moreover, although the thing which encloses only the side surface and outer peripheral surface of the front-end | tip part of an oil scooping-up member was shown as an entrainment suppression member, it is not limited to this, It is good also as a shape enclosed to an inner diameter direction side rather than a front-end | tip part.

  Moreover, in Embodiment 2, although the guide surface by a level | step difference showed the example formed in only one of the both sides | surfaces of the front-end | tip part of an oil scooping member in an entrainment suppression member, you may provide in the other side. . That is, a columnar portion that forms a guide surface from the bottom of the L-shaped cross-section suppressing member may be raised in parallel with the side piece portion, and its side surface may be used as the guide surface.

1 Motor (drive device)
2 Case 3 Oil scooping member 4 Entrainment suppressing member 11 Rotor (rotating body)
12 Drive shaft (rotating body)
21 Oil reservoir 31 Outer peripheral tip 44 Step 44a Guide surface 204 Entrainment suppression member 304 Entrainment suppression member Ar1, Ar2 Airflow Ar3 Airflow OL1 Oil surface

Claims (7)

A case for accommodating a rotating body rotated by a driving device;
An oil reservoir provided in the case for storing oil;
An oil scooping member that rotates integrally with the rotating body and scoops up the oil stored in the oil storage part at the tip in the outer diameter direction during rotation;
An oil scraping device comprising:
When the oil scooping member rotates, an entrainment suppressing member that guides the air flow toward the oil storage part together with the tip part in a direction away from the oil scooping member is perpendicular to the oil level position or the oil level position. An oil scooping device that is installed within a predetermined distance in the direction. In the oil scooping device according to claim 1,
The oil scraping device, wherein the entrainment suppression member is formed in a concave cross-sectional shape surrounding both side surfaces and the tip surface of the tip portion of the oil scraping member. In the oil scooping device according to claim 1 or 2,
A stepped portion having a guide surface extending in a direction intersecting a rotation direction of the oil lifting member is formed on a surface of the winding suppressing member facing the side surface of the oil lifting member. Oil scraping device. In the oil scooping device according to any one of claims 1 to 3,
The entrainment suppressing member extends from the upper position of the oil surface to the lower position of the oil surface along the rotation direction of the oil scraping member, and more than half of the extending length in the rotation direction. An oil scooping device arranged below the oil level position when not rotating. In the oil scooping device according to any one of claims 1 to 3,
An oil scooping device, wherein the entrainment suppressing member is formed in a plate shape. In the oil scooping device according to claim 5,
The oil scooping device, wherein the entrainment suppressing member is installed at the oil level position when the rotating body is not rotating. In the oil scooping device according to any one of claims 1 to 6,
The entrainment suppressing member includes a position where the tip of the oil scooping member enters the oil during normal rotation of the rotating body, and a tip of the oil scooping member during the reverse rotation of the rotating body. An oil scooping device provided at an intrusion position.