JP5802586B2 - Lubricator for power transmission mechanism - Google Patents

Description

  The present invention relates to a lubricating device for a power transmission mechanism that lubricates gears and the like with an oil pump.

  In the lubrication device described in Patent Document 1, an oil strainer is disposed so as to lie in the same plane in the vertical direction at the bottom of the transmission case, and the retainer is pressed toward the oil strainer by a pressing spring supported by the drain plug. The oil strainer is fixed to the transmission case. The oil flows into the oil strainer from the opening above the oil strainer and flows out from the opening of the retainer on the side of the oil strainer.

  By fixing the oil strainer in this way, it is described that the oil strainer can be taken out from the inside of the transmission case by removing the drain plug at the time of oil change, and the oil strainer can be easily cleaned. Yes.

Japanese Utility Model Publication No. 64-45055

  However, in the lubricating device described in Patent Document 1, since foreign matter collected by the oil strainer accumulates above the oil strainer, there is a concern that the filter performance may deteriorate as the usage time becomes longer.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lubricating device for a power transmission mechanism that can suppress a decrease in filter performance of an oil strainer.

In order to achieve the above object, the invention described in claim 1
An oil pump (for example, an embodiment described later) is circulated by lubricating oil stored in an oil reservoir (for example, an oil reservoir 12 of an embodiment described later) inside a case (for example, a mission case 11 of the embodiment described later). A lubricating device for a power transmission mechanism (for example, a transmission 10 in an embodiment described later) for supplying the lubricating oil from the oil pump 44),
An oil strainer (for example, oil strainers 50 and 50A in the embodiments described later);
An insertion part (for example, a strainer insertion port 18 of an embodiment described later) into which the oil strainer formed on the lower surface of the case can be inserted;
A lid (for example, a strainer cover 27 in an embodiment described later) for sealing the insertion portion;
A support member for supporting the oil strainer (for example, a spring 28 and a rib 27b in an embodiment described later);
A first chamber (for example, a lower space 61 in an embodiment described later) at least a part of which is located upstream of the oil strainer;
A second chamber (for example, an upper space 62 in an embodiment described later) at least a part of which is located downstream of the oil strainer;
An internal communication part (for example, an oil circulation path 13 in an embodiment described later) that communicates the oil reservoir and the first chamber;
A pump communication portion (for example, a suction pipe 42 in an embodiment described later) for communicating the second chamber and the oil pump;
It said first and second chambers is extended toward the insertion portion or al upper side in,
A connection portion between the internal communication portion and the first chamber (for example, a connection portion 64 in an embodiment described later) has a bent portion bent in the same plane ,
A magnet is provided on a wall surface of the first chamber facing the bent portion and the connecting portion .

Moreover, in addition to the structure of Claim 1, the invention of Claim 2 is
The oil strainer filter (for example, the filter 51 in the embodiment described later) is disposed in the second chamber,
The filter is formed in a hollow cylindrical shape extending in the longitudinal direction of the second chamber,
The lubricating oil flows from the first chamber through the filter into a gap formed by a wall surface of the filter and the second chamber.

Moreover, in addition to the structure of Claim 2, the invention of Claim 3 is
The lid portion has an annular recess (for example, a recess 27a in an embodiment described later) in the upper part,
The inner diameter dimension of the recess is larger than the outer diameter dimension of the filter.

Moreover, in addition to the structure of Claim 3, the invention of Claim 4 adds to the structure of Claim 3,
The bottom surface of the recess, characterized in that located below side Ri by said connecting portion.

According to the first aspect of the present invention, since the connecting portion between the internal communication portion and the first chamber is bent in the horizontal plane, the foreign matter is likely to collect in the bent portion, and the foreign matter is collected upstream of the oil strainer. By collecting, clogging of the oil strainer can be suppressed, and a decrease in filter performance can be suppressed.
In addition, since the oil bends in the horizontal plane and then bends upward in the vertical direction, foreign matter tends to accumulate in the lid, and the oil strainer is clogged by collecting further foreign matter upstream from the oil strainer. It is possible to suppress the deterioration of the filter performance. Furthermore, by removing the lid, foreign matter can be discharged along with oil discharge, and the oil strainer can be easily cleaned and replaced.

  According to the second aspect of the present invention, since it is not necessary to provide a space for arranging the oil strainer separately from the first chamber and the second chamber, the lubricating device can be reduced in size.

  According to the third aspect of the present invention, since the foreign matter can be kept in the concave portion, the foreign matter can be removed by cleaning only the concave portion.

  According to invention of Claim 4, it can suppress that the foreign material repaired to the recessed part is stirred with lubricating oil.

It is a figure which shows the power transmission mechanism for motor vehicles provided with the lubricating device of 1st Embodiment which concerns on this invention, (a) is the figure which looked at the 1st case and the speed change mechanism from the inside, (b) is the 2nd It is the figure which looked at the case from the inside. It is the sectional view on the AA line of Fig.1 (a). FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a figure which shows the connection part of an oil circulation path and the downward space of an oil strainer insertion space. It is a perspective view explaining the support structure of an oil strainer. It is a fragmentary sectional view of the power transmission mechanism for motor vehicles provided with the lubricating device of 2nd Embodiment which concerns on this invention.

  Hereinafter, embodiments of a lubricating device for a power transmission mechanism according to the present invention will be described with reference to the drawings. First, a lubricating device for a power transmission mechanism (hereinafter referred to as a transmission) according to a first embodiment will be described with reference to FIGS.

<First Embodiment>
As shown in FIGS. 1A and 1B, an automobile transmission 10 rotates in a direction perpendicular to the paper surface inside a transmission case 11 formed by a first case 11A and a second case 11B. A transmission mechanism including a first main shaft MS1, a second main shaft MS2, an idle shaft IS, a counter shaft CS, a reverse shaft RS, and a differential device D serving as axes, and a motor (not shown) are arranged. As shown by the arrows in FIG. 1, the transmission 10 has the differential device D side forward and the reverse shaft side forward and backward with the left and right sides of the paper in the vertical direction. It arrange | positions so that it may become back. Therefore, the rotation axis of each shaft is in the vehicle width direction of the vehicle.

  Power from an engine and / or motor (not shown) is input from the first main shaft MS1 and can be output to the countershaft CS. Further, the power input to the first main shaft MS1 can be input to the second main shaft MS2 via the idle shaft IS, and the power input to the second main shaft MS2 can be output to the counter shaft CS. Composed. Further, the power input to the first main shaft MS1 is configured to be transmitted to the reverse shaft RS, and is configured to be output from the reverse shaft RS to the counter shaft CS via the idle shaft IS and the second main shaft MS2. . Each shaft is provided with a shift for switching the meshing between a gear (only some of the gears are shown in FIG. 1A) and the gear can be selected and the power transmission path can be switched. Yes. The power transmitted to the countershaft CS is input to the differential device D and output to a wheel (not shown).

  Referring also to FIG. 2, at the bottom of the mission case 11, there are an oil reservoir 12 that stores oil that serves both for lubrication and motor cooling, and an oil circulation path 13 that supplies oil to an oil strainer 50 (see FIG. 3). Is formed in the rotation axis direction, and the circulation path opening 14 of the oil circulation path 13 opens rearward in the rotation axis direction.

  A baffle plate 20 is provided on the second main shaft MS2 positioned at the lowest position in the vertical direction so as to surround the lower side of the gear G formed on the second main shaft MS2. The baffle plate 20 has an arc shape when viewed from the rotational axis direction, a baffle plate body 21 extending in the rotational axis direction, a cylindrical portion 22 positioned below the baffle plate body 21 and extending in the rotational axis direction, and the baffle plate A substantially rectangular surface portion 23 that connects the main body 21 and the cylindrical portion 22 and extends in the direction of the rotation axis is integrally formed.

  The baffle plate body 21 functions to reduce the rotational resistance of the gear G by scattering the internal oil by the rotation of the gear G formed on the second main shaft MS2, and lowering the oil level in the baffle plate body 21. Plays.

  The cylindrical portion 22 has a hollow shape, the front end portion 22a is press-fitted into the circulation passage opening portion 14 of the oil circulation passage 13 formed at the bottom of the transmission case 11, and the rear end portion 22b is oil that opens to the bottom surface side. A suction port 22c is formed. Therefore, since the oil stored in the oil reservoir 12 is sucked up from the oil suction port 22c and flows into the oil circulation path 13, the cylinder portion 22 functions as a suction guide. The baffle plate 20 configured as described above press-fits the front end portion 22a of the cylindrical portion 22 into the circulation path opening 14, and the clips (not shown) provided on the baffle plate 20 to the first and second cases 11A and 11B. It is fixed in the mission case 11 by being attached to the clip fastening portion.

  The oil circulation path 13 is bent in the same plane (hereinafter referred to as a horizontal plane) at the vertical position on the front side of the paper surface of FIG. Communicate to 60. As shown in FIG. 3, the oil strainer insertion space 60 extends vertically upward from a strainer insertion port 18 formed on the lower surface of the mission case 11, and is a lower space formed in a columnar shape including the strainer insertion port 18. 61 and an upper space 62 which is located above the lower space 61 and is formed in a columnar shape having a smaller diameter than the lower space 61. Therefore, the boundary between the upper space 62 and the lower space 61 is a stepped portion 63 whose diameter decreases from the upper space 62 side to the lower space 61 side.

  As shown in FIG. 1, the upper space 62 is connected to an oil pump 44 disposed above the mission case 11 via a suction pipe 42. A lubrication pipe 46 different from the oil pump 44 is also connected to the oil pump 44, and oil is supplied through the lubrication pipe 46 to each shaft, gear meshing portions, and the like.

  In the vicinity of the step portion 63 of the lower space 61, the connection portion 64 connected to the oil circulation path 13 is located, and the connection portion 64 between the lower space 61 and the oil circulation path 13 is bent in a horizontal plane. .

FIG. 4 is a view showing a connection portion 64 between the oil circulation path 13 and the lower space 61 of the oil strainer insertion space 60.
A wall surface W1 on which the oil of the connecting portion 64 collides, and a wall surface W2 of the lower space 61 facing the connecting portion 64, that is, magnets Mg1 and Mg2 for collecting foreign matter at a position 180 ° circumferentially from the connecting portion 64. Is attached.

  An oil strainer 50 is inserted from the strainer insertion opening 18 opened on the lower surface of the mission case 11. As shown in FIG. 5, the oil strainer 50 has a hollow cylindrical filter 51 held by a filter holder 52. In the filter holder 52, two support plates 54 arranged at intervals of 180 degrees extend downward from a disk-like top plate 53 having a diameter smaller than the diameter of the upper space 62, and the two support plates 54 are positioned downward. And is connected to a hollow cylindrical holder base 55 and holds the filter 51 therein. A flange 56 having substantially the same size as the diameter of the lower space 61 protrudes from the holder base 55 to the outer diameter side.

  The oil strainer 50 inserted from the strainer insertion port 18 is positioned in the oil strainer insertion space 60 by pressing the flange 56 of the filter holder 52 against the step portion 63 by the spring 28 supported by the strainer cover 27. The filter 51 is accommodated in the upper space 62. The strainer cover 27 is screwed onto the lower surface of the transmission case 11 with a bolt 29 to seal the strainer insertion port 18.

  Returning to FIG. 3, the strainer cover 27 is formed with a recess 27 a on the upper surface facing the oil strainer 50. The inner diameter dimension of the recess 27 a is larger than the outer diameter dimension of the filter 51. The bottom surface of the recess 27 a is positioned below the connecting portion 64 between the lower space 61 and the oil circulation path 13 in the vertical direction. A magnet Mg3 is also attached to the bottom surface of the recess 27a.

  In the lubrication device of the transmission 10 configured as described above, when the oil pump 44 is operated, oil is supplied to the shafts, gear meshing portions and the like through the lubrication pipe 46 and stored in the oil reservoir 12. The flowing oil flows from the oil suction port 22 c provided below the cylinder portion 22 through the oil circulation path 13 to the lower space 61 of the oil strainer insertion space 60. In the connecting portion 64 between the oil circulation path 13 and the lower space 61, the oil flow direction is bent in a horizontal plane, and therefore foreign matter contained in the oil is collected by the magnet Mg1 provided in the connecting portion 64. That is, foreign matters are collected on the upstream side of the oil strainer 50.

  Further, the oil flowing into the lower space 61 from the oil circulation path 13 is bent in the vertical direction upward at the wall surface of the lower space 61 facing the connection portion 64, and the lower space 61 facing the connection portion 64. Foreign matter is also collected by the magnet Mg2 provided on the wall surface W2. That is, foreign matter is also collected on the upstream side of the oil strainer 50 here.

  Then, the oil whose flow direction has been changed upward in the vertical direction passes through the filter 51 of the oil strainer 50, flows upward in the vertical direction through the gap formed by the wall surface of the filter 51 and the upper space 62, and further passes through the suction pipe 42. And collected by the oil pump 44. At this time, the foreign matter further contained in the oil is collected by the filter 51 of the oil strainer 50. By circulating the oil in this way, efficient lubrication of the transmission mechanism is realized.

  In this way, foreign matters are collected by the oil flow direction being bent in a horizontal plane at the connection portion 64 on the upstream side of the filter 51 of the oil strainer 50, so that the foreign matters are collected by the filter 51 of the oil strainer 50. As a result, the clogging of the filter 51 is suppressed and the deterioration of the filter performance is suppressed.

  In addition, since the oil strainer insertion space 60 extends upward in the vertical direction, foreign matter is collected by the bending of the oil flow direction in this case as well, so that it is collected by the filter 51 of the oil strainer 50. The foreign matter further decreases, clogging of the filter 51 is further suppressed, and the deterioration of the filter performance is suppressed.

  Further, when the oil pump 44 is stopped, the foreign matter collected by the filter 51 of the oil strainer 50 falls to the concave portion 27a of the strainer cover 27 located below the oil strainer 50 due to gravity. Here, since the inner diameter dimension of the recessed part 27a is larger than the outer diameter dimension of the filter 51, the fallen foreign material is efficiently accommodated in the recessed part 27a. And since the bottom face of the recessed part 27a is located below the connection part 64, even when the oil pump 44 operates again, it is suppressed that the collected foreign material rises.

  When oil is changed, the bolt 29 is removed and the strainer cover 27 is removed, so that the oil can be discharged and the oil strainer 50 can be removed, so that the oil strainer 50 can be easily cleaned and replaced. Furthermore, the foreign matter can be easily collected by cleaning the foreign matter collected by the strainer cover 27. By using the strainer insertion port 18 for exchanging the oil strainer 50 as a drain hole in this way, drain bolts and washers can be omitted, the number of parts and assembly man-hours can be reduced, and further, drain hole processing Man-hours can also be reduced.

Second Embodiment
Next, a lubricating device for a power transmission mechanism according to a second embodiment will be described with reference to FIG. In addition, since 2nd Embodiment has the structure same as 1st Embodiment except the structure of an oil strainer, it attaches | subjects the same code | symbol about the same part, and abbreviate | omits description.

  The oil strainer 50 </ b> A of the present embodiment is configured by a filter 51 </ b> A having a disk shape having substantially the same size as the lower space 61, and the filter 51 </ b> A is a rib 27 b that is erected on the strainer cover 27 at a predetermined interval in the circumferential direction. By being pressed by the step portion 63, it is positioned in the lower space 61 of the oil strainer insertion space 60.

  Thus, the filter 51 may be accommodated in the lower space 61, and even in this case, the same effect as the first embodiment can be obtained. Note that the oil strainer 50A of the present embodiment has a smaller area of the filter 51A than the oil strainer 50 of the first embodiment, but is included in the oil upstream of the oil strainer 50A, as in the first embodiment. Since foreign matters are collected, clogging of the oil strainer 50A can be suppressed as compared with the conventional case, and a decrease in filter performance can be suppressed.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
In the above embodiment, the oil strainer insertion space 60 is formed so as to extend straight upward from the strainer insertion opening 18 formed in the lower surface of the mission case 11, but from the strainer insertion opening 18 to the upper vertical direction. Not only when extending straight, it may be formed so as to extend obliquely from the strainer insertion port 18 toward the upper side in the vertical direction, and may be formed so as to be bent or curved toward the upper side in the vertical direction. In any case, the oil flowing into the lower space 61 from the oil circulation path 13 bends in the flow direction upward in the vertical direction on the wall surface of the lower space 61 facing the connecting portion 64, thereby upstream of the oil strainer 50. Foreign matter will be collected on the side.

10 Transmission (Power transmission mechanism)
11 Mission Case (Case)
12 Oil reservoir (oil reservoir)
13 Oil circulation path (internal communication part)
18 Strainer insertion slot (insertion part)
27 Strainer cover (lid)
27a Recessed portion 27b Rib (supporting member)
28 Spring (support member)
42 Suction pipe (pump communication part)
44 Oil pump 50, 50A Oil strainer 51, 51A Filter 61 Lower space (first chamber)
62 Upper space (second room)
64 connections

Claims (4)

A lubricating device for a power transmission mechanism that circulates lubricating oil stored in an oil reservoir inside the case and supplies the lubricating oil from an oil pump,
An oil strainer,
An insertion part into which the oil strainer formed on the lower surface of the case can be inserted;
A lid portion for sealing the insertion portion;
A support member for supporting the oil strainer;
A first chamber at least partially located upstream of the oil strainer;
A second chamber at least partially located downstream of the oil strainer;
An internal communication portion that communicates the oil reservoir and the first chamber;
A pump communication portion for communicating the second chamber and the oil pump;
It said first and second chambers is extended toward the insertion portion or al upper side in,
The connecting portion between the internal communication portion and the first chamber has a bent portion bent in the same plane ,
A lubricating device for a power transmission mechanism , wherein a magnet is provided on a wall surface of the first chamber facing the bent portion and the connecting portion . The filter of the oil strainer is disposed in the second chamber;
The filter is formed in a hollow cylindrical shape extending in the longitudinal direction of the second chamber,
The lubricating device for a power transmission mechanism according to claim 1, wherein the lubricating oil flows from the first chamber through the filter to a gap formed by a wall surface of the filter and the second chamber. The lid portion has an annular recess at the top,
3. The lubricating device for a power transmission mechanism according to claim 2, wherein an inner diameter of the recess is larger than an outer diameter of the filter. The bottom surface of the recess, the lubricating device for a power transmission mechanism according to claim 3, characterized in that located below side Ri by said connecting portion.

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