JP5769598B2 - Transmission oil strainer - Google Patents

Description

  The present invention relates to an oil strainer that sucks oil collected and accumulated in an oil pan of a vehicle transmission and guides it to an oil pump.

An oil strainer (hereinafter simply referred to as “strainer”) is disposed in an oil pan and extends its oil suction pipe into the oil. The liquid level constantly changes as it moves inside. For this reason, the oil suction pipe is positioned at a position where the oil is always stably present so that the suction port at the tip of the oil suction pipe is not exposed on the liquid level and the oil pump sucks air, or When it is difficult, it is necessary to increase the amount of oil in the oil pan so that the liquid level becomes high.
However, it becomes difficult to provide a portion where oil always exists under the compactness of various devices of the vehicle, and increasing the amount of oil causes an increase in weight of the entire transmission.

Therefore, as a solution, conventionally, for example, Japanese Patent Application Laid-Open No. 2007-205499 includes a horizontal portion that extends in the horizontal direction from the rotating portion, and an oil suction pipe that is bent vertically from the tip of the horizontal portion and extends into the oil. There has been proposed a structure in which the suction port can move in almost the whole area except the center part of the oil pan by rotating in the oil pan around the rotating part.
This is because even if the vehicle accelerates in either the front-rear direction, turns in the left-right direction, or travels uphill, an acceleration that changes the oil level of the oil pan is applied. Is intended to rotate around the rotating part and move to a position where the suction port is always below the liquid level.

JP 2007-205499 A

  That is, in the above-described conventional strainer, as shown in the plan view of FIG. 8, the horizontal portion 52 extends from the rotating portion 51 positioned substantially at the center of the oil pan 50, and the oil suction pipe 53 extends into the oil from the tip. ing. Assuming that the oil suction pipe 53 is at the initial position indicated by the solid line, for example, when acceleration indicated by a thick arrow acts from the PA to the PB direction and the oil moves in the oil pan 50 and the liquid level on the PB side becomes higher, The suction pipe 53 is expected to finally move to the phantom line position on the PB side.

However, since the oil suction pipe 53 has to rotate on an arc whose radius is the distance between the oil suction pipe 53 and the rotating portion 51, the oil flow A that moves upon receiving the acceleration indicated by the thick arrow B As shown in FIG. In addition, although arrow A is a flow of the oil in the oil pan 50, in order to avoid complexity, it has shown outside the oil pan.
When the change in the liquid level is small, it is not necessary for the oil suction pipe 53 to move to the phantom line position. However, in this case, the oil suction pipe 53 must cross the oil flow for a considerable distance as described above. Since the acceleration for moving is relatively small, the followability is particularly lowered.
Therefore, despite the expectation, there is a problem that it is difficult for the suction port at the lower end of the oil suction pipe 53 to reach an appropriate position where air is not sucked.

  For this reason, in view of the above-mentioned conventional problems, the present invention enables the oil suction pipe to move with high followability, and even if the oil level changes, the suction port is surely below the oil level, and the air is discharged. An object of the present invention is to provide an oil strainer for a transmission that does not inhale.

The present invention includes an oil suction pipe on the bottom wall of a housing that is partitioned into an upper chamber and a lower chamber by a filter, and the upper chamber is connected to the oil pump side to suck in oil collected and accumulated in an oil pan of a transmission. An oil strainer that leads to the oil pump, and has an arc cross-sectional area having a circular cross section in the bottom wall of the housing, and the arc cross-sectional area is provided with a hole centered at the lowest point thereof. Includes a cover member that is movably disposed along the arc and covers the hole over the moving range, and the oil suction pipe is provided to open to the cover member so as to communicate with the lower chamber through the hole, the lower the inlet extends downward, when the acceleration is applied, and the cover member is moved to move the oil suction pipe to bias the side of the oil, the housing holds the peripheral edge of the cover member A bar member holding portion is provided, and a seal is provided between the arc cross-sectional area of the bottom wall of the housing and the cover member held by the cover member holding portion to prevent air from entering and leaving the lower chamber. And a cover member holding portion are provided with a seal that prevents air from entering and exiting the lower chamber .

Since the cover member moves along the arc of the arc cross-sectional area toward the oil bias side and the oil suction pipe moves in the same direction, the suction port can always be kept below the oil level.
If the arc cross-sectional area is a spherical surface and a spherical disk is formed along the cover member arc cross-sectional area, the oil suction pipe can be quickly positioned at an arbitrary position within the hole.

It is sectional drawing which shows the 1st Example of this invention. It is a bottom view of the strainer of a 1st Example. It is explanatory drawing which shows the action | operation of a strainer. It is explanatory drawing which shows the action | operation of a strainer. It is sectional drawing which shows a 2nd Example. It is a bottom view of the strainer of a 2nd Example. It is explanatory drawing which shows the action | operation of a strainer. It is a figure which shows a prior art example.

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

FIG. 1 is a sectional view showing a first embodiment, and FIG. 2 is a bottom view of a strainer in a transmission case with an oil pan removed.
A strainer 10 is disposed in an oil pan 2 attached to the lower end portion of the transmission case 1 and is supported by an oil passage cylinder 5 connected to an oil passage connected to an oil pump (not shown).
The strainer 10 includes a housing 11 and an oil suction pipe 42 extending from the housing 11.
The housing 11 includes an upper half 12, a filter holding plate 16, a lower half 20, and a disk 30 held by the lower half 20.

The upper half part 12 has an upper wall 13 having an arbitrary plane shape and a side wall 14 connected to the upper wall, and has a cross-sectional hat shape including a flange part 15 on the periphery of the opening. The lower half portion 20 includes a spherical surface portion 21 that bulges downward, and a flange portion 22 that extends outward from its peripheral edge and forms a flat surface as a whole. The outer shape of the flange portion 22 is made to correspond to the outer shape of the flange portion 15 of the upper half portion 12.
The filter holding plate 16 has a hole at a portion corresponding to the inner side from the periphery of the spherical surface portion 21, and a filter mesh 18 is attached so as to fill the hole.

  The flange portion 15 of the upper half portion 12 and the flange portion 22 of the lower half portion 20 are overlapped with each other with the peripheral edge portion of the filter holding plate 16 therebetween, and an upper chamber R1 is formed between the upper half portion 12 and the filter holding plate 16; The lower half 20 cooperates with the disk 30 to form a lower chamber R2 between the filter holding plate 16 and the lower half 20. In addition, in order to avoid interference with the other member in the oil pan 2, the flange part etc. with which the periphery overlapped can be suitably trimmed.

The oil passage cylinder 5 is coupled to, for example, the center of the upper wall 13 of the housing 11 and opens into the upper chamber R1.
The lower half 20 becomes the lower wall of the housing 10.
A round hole 23 centering on the lowest point is formed at the center of the spherical surface portion 21 of the lower half portion 20. Strictly speaking, the lowest point is a point that is the lowest position when the transmission is mounted on the vehicle, but the lowest position is determined from the viewpoint of determining the approximate center of the movement range of the disk 30 described later. If it is the predetermined range including, it is sufficient practically.

A guide member 25 is attached to the lower half 20. The guide member 25 is concentric with the spherical surface portion 21 and forms a predetermined gap with respect to the spherical surface portion 21, and a basic ring shape that contacts the flange portion 22 of the lower half portion 20 with a step from the periphery of the spherical surface portion 26. And a round hole 28 corresponding to the round hole 23 of the lower half 20 at the center of the spherical part 26.
The guide member 25 is preferably joined by welding to the lower half 20 at the flange 27 before joining the lower half 20 to the upper half 12 and the filter holding plate 16.
As a result, a disk holding part 29 having a constant gap along the spherical surface is formed between the guide member 25 and the spherical part 21 of the lower half part 20, and the disk 30 is held here. In the present embodiment, a disk holding portion 29 is formed over the entire area of the spherical portion 21 surrounding the round hole 23 of the lower half portion 20.

The disk 30 is formed of a spherical plate that fits in the disk holding part 29, and can slide in the disk holding part 29 in an arbitrary direction of 360 °.
An oil suction pipe 42 extending downward is provided at the center O <b> 2 of the disk 30. The oil suction pipe 42 communicates with the lower chamber R <b> 2 of the housing 11, and the lower end serves as a suction port 43.
A rectangular plate-like weight 45 is radially attached to the lower half of the outer wall of the oil suction pipe 42 at equal intervals in the circumferential direction, extending in the radial direction in the longitudinal direction, forming a fin shape as a whole. The lower end edge of each weight 45 is flush with the suction port 43.

Lip seals 24 (24a, 24b) are provided between the disk 30 and the spherical surface portion 21 and between the disk 30 and the guide member 25, respectively, so that air does not enter and exit from the disk holding portion 29 into the housing 11. Configured.
When the lip seal 24 is provided on the spherical surface portion 21 and the disk holding portion 29 side, it is disposed near the hole edge of the round hole 23 (28), and when the lip seal 24 is disposed on the disk 30 side, it is disposed near the outer peripheral edge of the disk 30. do it. In any arrangement, the lip seal 24 extends in a circle corresponding to the round hole 23.

The relationship between the disk 30 and the disk holding part 29 is such that when the side wall of the oil suction pipe 42 comes into contact with the inner peripheral edge of the disk holding part 29 (the hole edge of the round hole 23 (28)), the round hole 23 (28) in the disk 30 is obtained. More specifically, it is set so that the seal by the lip seal 24 is held so that the outer periphery on the side opposite to the contact point does not come off from the disk holder 29.
Thereby, the disk 30 can move in any direction until the side wall of the oil suction pipe 42 contacts the inner peripheral edge of the disk holding part 29 while holding the housing 11 in a liquid-tight state.
The bottom wall of the oil pan 2 has at least a region facing the disk 30 in the movable range as a spherical surface portion 21 of the lower half portion 20 and a spherical surface portion 3 concentric with (ie parallel to) the spherical surface portion 26 of the guide member 25. The region is also set so as not to interfere with the housing 11.
While the disk 30 moves, the distance between the suction port 43 and the bottom wall of the oil pan 2 is constant.

In the strainer configured as described above, when the acceleration in the PB direction from PA as shown in FIG. 3 acts, the oil in the oil pan 2 moves in the same direction as indicated by arrow A and is biased. The disk 30 slides from the current position X1 indicated by the phantom line toward the oil bias side against the frictional force of the lip seal 24 (24a, 24b), and the oil suction pipe 42 is a hole edge of the round hole 28 (23). It moves to a position X2 indicated by a solid line in contact with.
As shown in FIG. 4, the movement of the disk 30 draws an arc along the spherical surface of the disk holding portion 29, and hence the spherical surface of the disk 30 itself. The suction port 43 of the oil suction pipe 42 protruding from the disk 30 also draws an arc, and the position of the suction port 43 becomes higher at the position X2, but the bottom wall of the oil pan 2 is also a spherical surface parallel to the disk 30. Since the bottom wall at the position X2 is high and the suction port 43 is surely below the liquid level of the oil moved to the PB side by acceleration, air is not sucked.

The disk 30 can move in any direction along the spherical surface with respect to the disk holding portion 29, and the oil suction pipe 42 moves almost linearly to the final position regardless of the direction of acceleration, so that the responsiveness is high.
Note that the disk 30 moves to a midway position where the oil suction pipe 42 does not come into contact with the hole edge of the round hole 28 (23) under a gentle slope or low acceleration. Since the degree of inclination is small, the suction port 43 of the oil suction pipe 42 is sufficiently below the oil level where the oil is inclined and does not suck air.
Further, by forming the spherical portion 21 in the lower half portion 20 of the housing 11 and making the disc 30 movable along the spherical surface, the disc 30 moves according to the horizontal or inclination of the road surface when the vehicle stops, Since the suction port 43 of the oil suction pipe 42 settles in the vicinity of the lowest position in the vertical direction, the suction port 43 is surely positioned below the oil level even when the vehicle starts next time, and there is no fear of air suction.

In the present embodiment, the lower half portion 20 corresponds to the bottom wall of the housing in the invention, and the spherical surface portion 21 corresponds to the arc cross-sectional area.
The disk 30 corresponds to the cover member, and the disk holding portion 29 corresponds to the cover member holding portion.

The first embodiment is configured as described above, and the oil suction pipe 42 is provided in the lower half portion 20 of the housing 11 partitioned by the filter mesh 18 into the upper chamber R1 and the lower chamber R2, and the upper chamber R1 is disposed on the oil pump side. The oil strainer is connected to the oil pan and sucks the oil collected and accumulated in the oil pan of the transmission and guides it to the oil pump. The lower half portion 20 includes a spherical portion 21, and the spherical portion 21 has its lowest point. And the spherical portion 21 is provided with a disk 30 which is arranged so as to be movable along the spherical surface and covers the round hole 23 over the moving range, and the oil suction pipe 42 passes through the round hole 23. An opening is provided in the disk 30 so as to communicate with the lower chamber R2, and the lower end serves as a suction port 43 that extends downward. When acceleration is applied, the disk 30 moves and an oil suction pipe is provided on the oil bias side. 4 Since the oil suction pipe 42 moves in the same direction within the range of the round hole 23 regardless of the direction of the oil, the suction port 43 can always be kept below the liquid level of the oil. I can .

The housing 11 is provided with a disk holding portion 29 that holds the periphery of the disk 30, and prevents air from entering and leaving the lower chamber R <b> 2 between the spherical surface portion 21 and the disk 30 held by the disk holding portion 29. Since the lip seal 24a is provided, and further, the lip seal 24b is provided between the disc 30 and the disc holding portion 29 to prevent air from entering and exiting into the lower chamber R2. While being movable, air suction from the relative movement site is reliably prevented .
Since the oil suction pipe 42 is provided at the center of the disk 30, the oil suction pipe 42 can be moved uniformly in all directions from the center position of the round hole 23 of the housing 11 .

Since the weight 45 is attached to the oil suction pipe 42, not only due to the flow of oil when subjected to acceleration, but also due to the large external force due to the acceleration applied to the mass of the oil suction pipe 42 and the weight 45, the disk 30 is It becomes easier to move and responsiveness is improved .
Further, since the bottom wall of the oil pan 2 facing the suction port 43 of the oil suction pipe 42 is the spherical surface portion 3 parallel to the spherical surface portion 21 of the housing, the bottom wall becomes farther away from the position corresponding to the center of the round hole 23. Becomes higher. For this reason, the oil level on the biased side moved under acceleration is also particularly high, and the amount of oil in the oil pan is reduced by the height of the bottom wall while the suction port 43 is reliably positioned below the level. it is possible.

Next, a second embodiment will be described. This is suitable for a transmission of a vehicle in which a change in main acceleration such as a track vehicle is limited to one direction such as front and rear.
FIG. 5 is a cross-sectional view of the second embodiment, and FIG. 6 is a bottom view of the strainer in the transmission case of the second embodiment shown with the oil pan removed.
In the strainer 10 ′ of the present embodiment, the lower half portion 20 ′ of the housing 11 ′ has a cylindrical surface portion 21A in which the front-rear cross-section when mounted on the vehicle forms an arc and bulges downward, and extends outward from its peripheral edge. As a flat flange portion 22. The outer shape of the flange portion 22 is made to correspond to the outer shape of the flange portion 15 of the upper half portion 12.
At the center of the cylindrical surface portion 21A, a rectangular hole 23A that is long in the front-rear direction with the lowest point as the center is formed, and a rectangular cover plate 30A is used as a cover member instead of the disk 30 of the previous embodiment.

A guide member 25 'is attached to the lower half 20'. The guide member 25 ′ is concentric with the cylindrical surface portion 21A and has a cylindrical surface portion 26A that forms a predetermined gap with respect to the cylindrical surface portion 21A, and a basic shape that contacts the flange portion 22 of the lower half portion 20 ′ with a step from the periphery of the cylindrical surface portion 26A. It has a rectangular frame-shaped flange portion 27 ', and has a rectangular hole 28A corresponding to the rectangular hole 23A of the lower half portion 20' at the center of the cylindrical surface portion 26A.
Thus, a cover plate holding portion 29A having a constant gap is formed between the guide member 25 ′ and the cylindrical surface portion 21A of the lower half portion 20 ′, and the cover plate 30A is held here.

The cover plate 30A is formed of a cylindrical face plate that fits in the cover plate holding portion 29A, and can slide in the front and rear (longitudinal) direction within the cover plate holding portion 29A.
Similarly to the first embodiment, lip seals 24 (24a, 24b) are provided between the cover plate 30A and the cylindrical surface portion 21A and between the cover plate 30A and the guide member 25 to hold the cover plate. Air is prevented from entering and exiting the housing 11 ′ from the portion 29A. Unlike the first embodiment, the lip seal 24 extends in a rectangular shape, but the same number is used for simplicity.
An oil suction pipe 42 extending downward is provided at the center O2 of the cover plate 30A. The oil suction pipe 42 communicates with the lower chamber R2 of the housing 11 ′ and has a lower end as a suction port 43.
A weight 45 is attached to the oil suction pipe 42 as in the previous embodiment.
The lateral width of the rectangular hole 28A of the guide member 25 ′ is slightly larger than the diameter of the oil suction pipe 42 so as to allow the oil suction pipe 42 to slide.

The relationship between the cover plate 30A and the cover plate holding portion 29A is that when the side wall of the oil suction pipe 42 contacts the front end of the inner peripheral edge of the cover plate holding portion 29A (the front end edge of the rectangular hole 23A (28A)), The end is not removed from the cover plate holding portion 29A, and the seal by the lip seal 24 is held. The same applies to the case where the front and rear are reversed.
Thereby, the cover plate 30A can move in a range until the side wall of the oil suction pipe 42 contacts the front end edge and the rear end edge of the rectangular hole 23A (28A) while holding the housing 11 'in a liquid-tight state. .

The bottom wall of the oil pan 2 ′ has at least a region facing the cover plate 30A in the movable range as a cylindrical surface portion 21A of the lower half portion 20 ′ and a cylindrical surface portion 3A concentric with the cylindrical surface portion 26A of the guide member 25 ′. The region is also set so as not to interfere with the housing 11 '.
The other configuration of the strainer 10 ′ is the same as that of the strainer 10 of the previous embodiment.
While the cover plate 30A moves, the distance between the suction port 43 and the bottom wall of the oil pan 2 'is constant.

In the strainer 10 ′ configured as described above, for example, when acceleration in the front-rear direction is applied due to sudden start, the oil in the oil pan 2 ′ moves in the same direction as indicated by an arrow A and is biased as shown in FIG. However, the cover plate 30A also slides against the oil bias side from the current position X1 indicated by the phantom line against the frictional force by the lip seal 24, and the oil suction pipe 42 contacts the rear end edge of the rectangular hole 28A (23A). Move to the position X2 indicated by the solid line in contact.
As shown in FIG. 4 in the previous embodiment, the movement of the cover plate 30A in the cross section draws an arc along the cylindrical surface of the cover plate holding portion 29A, and the suction port 43 of the oil suction pipe 42 extending from the cover plate 30A also has an arc. However, since the bottom wall of the oil pan 2 'is also a cylindrical surface parallel to the cover plate 30A, the suction port 43 is below the liquid level of the oil moved to the PB side by the acceleration even at the position X2. Never inhale air.
Since the cover plate 30A moves linearly along the cylindrical surface with respect to the cover plate holding portion 29A, the responsiveness is high.
Further, as in the previous embodiment, when the vehicle is stopped, the suction port 43 of the oil suction pipe 42 settles near the lowest position, so there is no fear of air suction when the vehicle starts next time.

In the second embodiment, the lower half portion 20 'corresponds to the bottom wall of the housing in the invention, and the cylindrical surface portion 21A corresponds to the arc cross-sectional area.
Further, the cover plate 30A corresponds to the cover member, and the cover plate holding portion 29A corresponds to the cover member holding portion.

The second embodiment is configured as described above, and the oil suction pipe 42 is provided in the lower half portion 20 'of the housing 11' partitioned by the filter mesh 18 into the upper chamber R1 and the lower chamber R2, and the upper chamber R1 is oiled. An oil strainer connected to the pump side, sucking the oil collected and accumulated in the oil pan of the transmission and guiding it to the oil pump, comprising a cylindrical surface portion 21A having a circular section in the lower half portion 20 ′, The cylindrical surface portion 21A is provided with a rectangular hole 23A centered on the lowest point, and the cylindrical surface portion 21A is provided with a cover plate 30A that is movably disposed along the cylindrical surface and covers the rectangular hole 23A over the moving range. The oil suction pipe 42 is provided in the cover plate 30A so as to communicate with the lower chamber R2 through the rectangular hole 23A, and extends downward to form the suction port 43 at the lower end so that acceleration acts. Since the cover plate 30A moves to move the oil suction pipe 42 toward the oil bias side, the oil suction pipe 42 moves in the same direction within the rectangular hole 23A even if the oil is biased by acceleration. Therefore, the suction port 43 can always be kept below the oil level. Since the cover plate 30A moves linearly along the cylindrical surface portion 21A, the responsiveness is high .

The housing 11 ′ is provided with a cover plate holding portion 29A for holding the periphery of the cover plate 30A, and at least the space between the cylindrical surface portion 21A and the cover plate 30A held by the cover plate holding portion 29A is provided into the lower chamber R2. Since a seal that prevents air from entering and exiting is provided, and further, a lip seal 24b that prevents air from entering and exiting into the lower chamber R2 is provided between the cover plate 30A and the cover plate holding portion 29A. While the cover plate 30A can be moved with a simple structure, air suction from the relative movement portion is reliably prevented .
Further, since the cylindrical surface portion 21A has a cylindrical surface in the longitudinal direction of the rectangular hole 23A and the cover plate 30A is a cylindrical surface plate along the cylindrical surface portion 21A, the cover plate 30A can be easily manufactured simply by curving the flat plate. .

Since the oil suction pipe 42 is provided at the center of the cover plate 30A, the oil suction pipe 42 can be moved evenly in the front-rear direction from the center position of the rectangular hole 23A of the housing 11 ′ .
Further, the bottom wall of the oil pan 2 'facing the suction port 43 of the oil suction pipe 42 is provided with a cylindrical surface portion 3A parallel to the cylindrical surface portion 21A of the housing 11', and therefore a position corresponding to the center of the rectangular hole 23A. The farther away from the, the higher the bottom wall. For this reason, the oil level on the biased side moved under acceleration is particularly high, and the amount of oil in the oil pan 2 'can be reduced while the suction port 43 is reliably positioned below the level .

Further, as in the previous embodiment, since the weight 45 is attached to the oil suction pipe 42, not only due to the flow of oil when subjected to acceleration, but also due to the acceleration applied to the mass of the oil suction pipe 42 and the weight 45. With the help of external force, the cover plate 30A becomes easier to move and the responsiveness is improved .

Each example is merely an example of an embodiment of the present invention, and the curvature or size of the spherical surface of the disk 30 or the curved surface of the cover plate 30A, the shape of the oil suction pipe 42 and the weight 45, etc. are arbitrarily set. Can do.
Further, the lip seal 24 is used to seal the disk 30 and the cover plate 30A in the disk holding portion 29 and the cover plate holding portion 29A. However, the present invention is not limited to this, and an appropriate sealing means having a low frictional resistance is used. Can be adopted.

  In the second embodiment, the housing 11 ′ is provided with the cylindrical surface portion 21A as the arc cross-sectional area of the bottom wall, and the cover plate 30A of the cylindrical face plate is used as the cover member. The rectangular hole 23A is formed with the spherical surface 21 being used, and the disc 30 is cut to a certain width as a cover member to form a cover plate, and the cover plate can be moved along the spherical surface 21 in a state of covering the rectangular hole 23A. A cover plate holding part can also be set.

DESCRIPTION OF SYMBOLS 1 Transmission case 2, 2 'Oil pan 3 Spherical surface part 3A Cylindrical surface part 5 Oil path cylinder 10, 10' Strainer 11, 11 'Housing 12 Upper half part 13 Upper wall 14 Side wall 15, 22, 27, 27' Flange part 16 Filter holding plate 18 Filter mesh 20, 20 'Lower half part 21, 26 Spherical surface part 21A, 26A Cylindrical surface part 23, 28 Round hole 23A, 28A Rectangular hole 24a, 24b Lip seal 25, 25' Guide member 29 Disc holding part 29A Cover Plate holder 30 Disc 30A Cover plate 42 Oil suction pipe 43 Suction port 45 Weight R1 Upper chamber R2 Lower chamber

Claims (7)

An oil suction pipe is provided on the bottom wall of the housing divided into an upper chamber and a lower chamber by a filter, and the upper chamber is connected to the oil pump side, and the oil collected and accumulated in the oil pan of the transmission is sucked into the oil An oil strainer leading to the pump,
The bottom wall is provided with an arc cross-sectional area having a circular cross section, and the arc cross-sectional area is provided with a hole centered on the lowest point thereof,
The arc cross-sectional area includes a cover member that is movably disposed along the arc and covers the hole over the moving range,
The oil suction pipe is provided to open to the cover member so as to communicate with the lower chamber through the hole, and extends downward to serve as a suction port at the lower end.
When acceleration is applied, the cover member moves to move the oil suction pipe to the oil bias side ,
The housing is provided with a cover member holding portion for holding the periphery of the cover member, and at least between the arc cross-sectional area of the bottom wall and the cover member held by the cover member holding portion into the lower chamber. The transmission is characterized in that a seal for preventing the air from entering and exiting is provided, and a seal for preventing the air from entering and exiting the lower chamber is also provided between the cover member and the cover member holding portion . Oil strainer. The oil strainer for a transmission according to claim 1, wherein the hole is a long hole having a direction along the arc as a longitudinal direction . The circular arc cross-sectional area forms a cylindrical surface in the longitudinal direction of the hole;
The oil strainer of a transmission according to claim 2, wherein the cover member is a cylindrical face plate along the circular arc cross-sectional area . The arc cross-sectional area is spherical and the hole is a round hole;
The oil strainer of a transmission according to claim 1 , wherein the cover member is a spherical disk along the circular arc cross-sectional area . The transmission oil strainer according to any one of claims 1 to 4, wherein the oil suction pipe is provided at a center of the cover member .
Oil strainer for a transmission according to claim 1, any one of the 5, characterized in that said oil suction pipe and the weight is attached. The transmission according to any one of claims 1 to 6, wherein the bottom wall of the oil pan facing the suction port of the oil suction pipe includes at least a region parallel to a circular arc sectional region of the housing. Oil strainer.

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