Power transmission

Abstract

[Problem] To reduce the amount of foreign matter included in oil flowing into a strainer.　[Solution] This power transmission device comprises: a case for accommodating therein a power transmission mechanism; a control valve for controlling the pressure of oil for operating the power transmission mechanism; a pump for supplying oil to the control valve; and a strainer allowing passage of oil suctioned by the pump. The case is provided with: a first chamber having the strainer disposed so as to face the bottom wall part; a second chamber into which oil discharged from the control valve flows; and a connection part for connecting the first chamber and the second chamber. In the first chamber, on an oil transfer path which connects the connection part and the strainer, a first magnet is disposed so as to face the bottom wall part.

Description

[Technical field]

[0001] The present invention relates to a power transmission device. [Background technology]

[0002] Patent Document 1 discloses a hydraulic control device in which a magnet is provided on the surface of a strainer facing an oil pan to capture foreign matter contained in the oil in the oil pan. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-208779 A Summary of the Invention [Problem to be solved by the invention]

[0004] The oil in the oil pan is drawn to the oil pump through a strainer, which is fitted with a filter to remove foreign matter from the oil. It is preferable that the amount of foreign matter contained in the oil flowing into the inside of the strainer is small. [Means for solving the problem]

[0005] One aspect of the present invention is A case that houses a power transmission mechanism; a control valve that adjusts the pressure of oil for operating the power transmission mechanism; a pump for supplying oil to the control valve; a strainer through which the oil drawn by the pump passes, In the case, A first chamber in which the strainer is disposed opposite a bottom wall portion; a second chamber into which the oil discharged from the control valve flows; A communication section is provided to communicate the first chamber and the second chamber, In the first chamber, a first magnet is disposed opposite the bottom wall portion on a path of oil movement connecting the communication portion and the strainer, which is a power transmission device. Effect of the Invention

[0006] According to one aspect of the present invention, the amount of foreign matter contained in oil flowing into the strainer can be reduced. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram showing a schematic configuration of a power transmission device. [Diagram 2] FIG. 2 is a schematic diagram of the case as viewed from the second cover side. [Diagram 3] FIG. 3 is a schematic diagram illustrating the arrangement of the control valve in the second chamber. [Figure 4] FIG. 4 is a schematic diagram illustrating the arrangement of the strainer in the storage section. [Diagram 5] FIG. 5 is a plan view of the strainer as viewed from below the lower case side. [Figure 6] FIG. 6 is a schematic diagram illustrating the arrangement of the strainer and the mechanical oil pump in the housing portion. [Figure 7] FIG. 7 is a diagram illustrating the rotation transmission mechanism and the baffle plate. [Figure 8] FIG. 8 is a plan view of the second cover of the baffle plate. [Figure 9] FIG. 9 is a perspective view of the second cover of the baffle plate. [Figure 10] FIG. 10 is a diagram illustrating support of the magnet in the flange portion of the second cover. [Figure 11] FIG. 11 is a schematic diagram illustrating the action of magnets attached to a baffle plate. [Figure 12] FIG. 12 is a diagram for explaining the movement path of the oil OL along the bottom wall portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First, the definitions of terms used in this specification will be explained. The power transmission device is a device that has at least a power transmission mechanism, and the power transmission mechanism is, for example, at least one of a gear mechanism, a differential gear mechanism, and a reduction mechanism. In the following embodiment, an example is given in which the power transmission device 1 has the function of transmitting the output rotation of an engine, but the power transmission device 1 may be any device that transmits the output rotation of at least one of an engine and a motor (rotating electric machine).

[0009] "Overlapping when viewed in a predetermined direction" means that a plurality of elements are arranged in a predetermined direction, and is synonymous with "overlapping in a predetermined direction." The "predetermined direction" is, for example, an axial direction, a radial direction, a gravitational direction, a front-rear direction of a vehicle, etc. When a drawing shows multiple elements (parts, portions, etc.) arranged in a specified direction, it may be assumed that the description in the specification contains a sentence explaining that they overlap when viewed in the specified direction.

[0010] "Not overlapping when viewed in a predetermined direction" and "offset when viewed in a predetermined direction" mean that multiple elements are not lined up in a predetermined direction, and are synonymous with "not overlapping in a predetermined direction" and "offset in a predetermined direction." Examples of the "predetermined direction" include the axial direction, radial direction, gravity direction, and vehicle longitudinal direction (vehicle forward direction, vehicle backward direction). When a drawing shows that multiple elements (parts, portions, etc.) are not lined up in a specified direction, it may be assumed that the description in the specification contains a sentence explaining that they do not overlap when viewed in the specified direction.

[0011] "When viewed from a predetermined direction, a first element (part, section, etc.) is located between a second element (part, section, etc.) and a third element (part, section, etc.)" means that when observed from a predetermined direction, it can be observed that the first element is located between the second element and the third element. The "predetermined direction" refers to the axial direction, radial direction, gravity direction, vehicle running direction (vehicle forward direction, vehicle backward direction), etc. For example, when the second element, the first element, and the third element are arranged in that order along the axial direction, it can be said that the first element is located between the second element and the third element when viewed in the radial direction. When the drawing shows that the first element is between the second element and the third element when viewed in a specific direction, it may be deemed that the description in the specification contains a sentence explaining that the first element is between the second element and the third element when viewed in the specific direction.

[0012] When two elements (parts, portions, etc.) overlap in an axial view, the two elements are coaxial. "Axial direction" refers to the axial direction of the rotation shaft of a component constituting the power transmission device. "Radial direction" refers to the direction perpendicular to the rotation shaft of a component constituting the power transmission device. The component is, for example, a motor, a gear mechanism, a differential gear mechanism, etc.

[0013] "Vertical placement" of a control valve means that, in the case of a control valve having a basic configuration in which a separator plate is sandwiched between valve bodies, the valve bodies of the control valve are stacked in a horizontal direction based on the installation state of the power transmission device on the vehicle. The "horizontal direction" here does not mean a horizontal direction in the strict sense, but also includes cases where the stacking direction is inclined relative to the horizontal line.

[0014] Furthermore, "vertically mounted" of the control valve means that the control valve is arranged so that multiple pressure regulating valves (valve bodies) within the control valve are aligned in the direction of a vertical line VL based on the installation state of the power transmission device on the vehicle. "Aligning a plurality of pressure regulating valves in the direction of the vertical line VL" means that the pressure regulating valves in the control valve are arranged at staggered positions in the direction of the vertical line VL.

[0015] In this case, the pressure regulating valves do not need to be strictly aligned in a row in the direction of the vertical line VL. For example, in the case where a control valve is formed by stacking multiple valve bodies, in a vertically oriented control valve, multiple pressure regulating valves may be aligned in the direction of the vertical line VL while being shifted in the stacking direction of the valve bodies.

[0016] Furthermore, when viewed from the axial direction (the direction of forward and backward movement) of the valve disc provided in the pressure regulating valve, the multiple pressure regulating valves do not need to be aligned at intervals in the direction of the vertical line VL. When viewed from the axial direction (the direction of forward and backward movement) of the valve disc provided in the pressure regulating valve, multiple pressure regulating valves do not need to be adjacent to each other in the direction of the vertical line VL.

[0017] Therefore, for example, when pressure regulating valves lined up in the vertical line VL direction are arranged with their positions shifted in the stacking direction (horizontal direction) of the valve body, this also includes cases where adjacent pressure regulating valves in the vertical line VL direction are arranged in a positional relationship where they partially overlap when viewed from the stacking direction.

[0018] Furthermore, when a control valve is "vertically mounted," this means that multiple pressure regulating valves within the control valve are arranged in such a way that the movement direction of the valve body (spool valve) of the pressure regulating valve is aligned along the horizontal line. In this case, the movement direction of the valve body (spool valve) is not limited to the horizontal direction in the strict sense. The movement direction of the valve body (spool valve) in this case is the direction along the rotation axis X of the power transmission device. In this case, the direction of the rotation axis X and the sliding direction of the valve body (spool valve) are the same.

[0019] Hereinafter, an embodiment of the present invention will be described. FIG. 1 is a schematic diagram illustrating a general configuration of a power transmission device 1. As shown in FIG. As shown in FIG. 1, a housing HS of the power transmission device 1 is composed of a case 6, a first cover 7, a second cover 8, and a third cover 9. The housing HS accommodates the torque converter T / C, forward / reverse switching mechanism 2, variator 3, reduction gear mechanism 4, differential gear 5, electric oil pump EOP, mechanical oil pump MOP, control valve CV, etc. Here, the torque converter T / C, the forward / reverse switching mechanism 2, the variator 3, the reduction gear mechanism 4, and the differential gear 5 are components of the power transmission mechanism of the present invention.

[0020] In the power transmission device 1, the output rotation of an engine ENG (drive source) is input to a forward / reverse switching mechanism 2 via a torque converter T / C. The rotation input to the forward / reverse switching mechanism 2 is input to a primary pulley 31 of the variator 3 in a forward or reverse rotation.

[0021] In the variator 3, the winding radius of the belt 30 around the primary pulley 31 and the secondary pulley 32 is changed, so that the rotation input to the primary pulley 31 is changed in speed at a desired gear ratio and output from the output shaft 33 of the secondary pulley 32.

[0022] The output rotation of the secondary pulley 32 is input to a differential device 5 (differential gear mechanism) via a reduction gear mechanism 4, and then transmitted to the drive wheels WH, WH via left and right drive shafts 55A, 55B.

[0023] The reduction mechanism 4 has an output gear 41 , an idler gear 42 , a reduction gear 43 , and a final gear 45 . The output gear 41 rotates integrally with the output shaft 33 of the secondary pulley 32 . The idler gear 42 is meshed with the output gear 41 so as to be capable of transmitting rotation. The idler gear 42 is spline-fitted to an idler shaft 44. The idler gear 42 rotates integrally with the idler shaft 44. A reduction gear 43 having a smaller diameter than the idler gear 42 is provided on the idler shaft 44. The reduction gear 43 is meshed with a final gear 45 fixed to the outer periphery of a differential case 50 of the differential device 5 so as to be capable of transmitting rotation.

[0024] In the power transmission device 1, the forward / reverse switching mechanism 2, the torque converter T / C, and the output shaft of the engine ENG are arranged coaxially (concentrically) on the rotation axis X1 (first shaft) of the primary pulley 31. The output shaft 33 of the secondary pulley 32 and an output gear 41 are coaxially arranged on a rotation axis X2 (second shaft) of the secondary pulley 32. The idler gear 42 and the reduction gear 43 are coaxially arranged on a common rotation axis X3. The final gear 45 and the drive shafts 55A, 55B are arranged coaxially on a common rotation axis X4. In the power transmission device 1, these rotation axes X1 to X4 are set in a positional relationship in which they are parallel to one another. Hereinafter, these rotation axes X1 to X4 will be collectively referred to as the rotation axis X of the power transmission device 1 (power transmission mechanism) as necessary.

[0025] FIG. 2 is a schematic diagram showing the case 6 as viewed from the second cover 8 side. As shown in FIG. 2, the case 6 has a cylindrical peripheral wall portion 61 and a partition wall portion 62.

[0026] 1, the partition 62 divides the space inside the peripheral wall 61 into two in the direction of the rotation axis X1. One side of the partition 62 in the direction of the rotation axis X1 is a first chamber S1, and the other side is a third chamber S3. In the case 6, the opening on the first chamber S1 side is sealed by the second cover 8 (torque converter cover) to form a closed first chamber S1. The opening on the third chamber S3 side is sealed by the first cover 7 (side cover) to form a closed third chamber S3. The first chamber S1 accommodates the forward / reverse switching mechanism 2, the reduction mechanism 4, and the differential gear 5. The third chamber S3 accommodates the variator 3.

[0027] In the case 6, a storage section 68 that forms the second chamber S2 is provided on the outer periphery of the peripheral wall section 61 on the vehicle front side. The storage section 68 is provided with an opening facing the vehicle front side. The opening of the storage section 68 is sealed with the third cover 9 to form a closed second chamber S2. The second chamber S2 is provided with a control valve CV and an electric oil pump EOP.

[0028] As shown in FIG. 2, in the case 6, the partition portion 62 is located inside the joint portion 611. The partition wall 62 of the case 6 is provided in a range that crosses the rotation axes (rotation axes X1 to X4) of the power transmission mechanism. The partition wall 62 is provided in a direction that is approximately perpendicular to the rotation axes (rotation axes X1 to X4).

[0029] The partition wall 62 is provided with through holes 621 , 622 , 624 and a support hole 623 . The through hole 621 is formed around the rotation axis X1. A cylindrical support wall portion 631 surrounding the through hole 621 and a peripheral wall portion 641 surrounding the outer periphery of the support wall portion 631 at a distance are provided on the surface of the partition portion 62 facing the first chamber S1 (the front side of the paper). In Fig. 2, the support wall portion 631 and the peripheral wall portion 641 protrude toward the front side of the paper (the side toward the second cover 8 in Fig. 1).

[0030] An area 651 between the support wall portion 631 and the peripheral wall portion 641 is a cylindrical space that accommodates a piston (not shown) of the forward / reverse switching mechanism 2, friction plates (forward clutch, reverse brake), and the like. The input shaft 34 (see FIG. 1) of the primary pulley 31 is rotatably supported on the inner periphery of the support wall portion 631 via a bearing B.

[0031] As shown in FIG. 2, the through hole 622 is formed centered on the rotation axis X2. In the power transmission device 1 mounted on the vehicle V, the rotation axis X2 is located obliquely above and on the rear side of the vehicle when viewed from the rotation axis X1.

[0032] As shown in FIG. 2, the support hole 623 is a bottomed hole formed around the rotation axis X3. In the power transmission device 1 mounted on the vehicle V, the rotation axis X3 is located diagonally upward and rearward of the vehicle as viewed from the rotation axis X1, and diagonally downward and rearward of the vehicle as viewed from the rotation axis X2.

[0033] As shown in FIG. 2, the through hole 624 is formed centered on the rotation axis X4. In the power transmission device 1 mounted on the vehicle V, the rotation axis X4 is located diagonally downward on the vehicle rear side as viewed from the rotation axis X1, diagonally downward on the vehicle rear side as viewed from the rotation axis X2, and diagonally downward on the vehicle front side as viewed from the rotation axis X3.

[0034] A cylindrical support wall portion 634 is provided on a surface of the partition portion 62 facing the first chamber S1 (the front side of the page) and surrounding the through hole 624. The differential case 50 (see FIG. 1) of the differential device 5 is rotatably supported on the inner periphery of the support wall portion 634 via a bearing B. 1, a final gear 45 having a ring shape when viewed from the direction of the rotation axis X4 is fixed to the outer periphery of the differential case 50. The final gear 45 rotates integrally with the differential case 50 about the rotation axis X4.

[0035] As shown in Fig. 2, a baffle plate 66 is attached to the underside of the through hole 624 on the surface of the partition wall 62 facing the first chamber S1 (the front side of the page). When viewed from the direction of the rotation axis X4, the baffle plate 66 has a semicircular shape with a curved surface facing downward, and has a side plate portion 661 covering both side surfaces of the final gear 45 in the direction of the rotation axis X4, and an arc-shaped wall portion 662 covering the outer periphery in the radial direction of the rotation axis X4. Note that the side plate portion 661 on the front side of the page is not shown in Fig. 2. A magnet 14D (third magnet) is attached to the outer periphery of the arc-shaped wall portion 662 facing diagonally downward toward the strainer 10.

[0036] In the case 6, the area on the vehicle front side of the arc-shaped wall portion 662 of the baffle plate 66 and below the arc-shaped peripheral wall portion 641 serves as an accommodation portion 67 for the strainer 10 and the mechanical oil pump MOP. The storage portion 67 is located in the lower portion inside the case 6 (housing HS). Therefore, the storage portion 67 stores oil OL used for driving and cooling the components of the power transmission mechanism.

[0037] The storage section 67 is a space with a bottom, and in the storage section 67, the partition section 62 which serves as the bottom wall is located on the rear side of the paper surface in FIG.

[0038] The partition 62 has an opening 620. The opening 620 is located below the peripheral wall 641 of the partition 62 when viewed from the direction of the rotation axis X1. When viewed from the direction of the rotation axis X1, the opening 620 is provided at a position intersecting with a tangent Lm connecting the outer periphery of an arc-shaped peripheral wall portion 641 surrounding the forward / reverse switching mechanism 2 (not shown) and the outer periphery of an arc-shaped wall portion 662 of the baffle plate 66 surrounding the outer periphery of the final gear 45. The above-mentioned magnet 14D is provided at a position where the tangent Lm of the arc-shaped wall portion 662 intersects.

[0039] The opening 620 is formed in a range extending from the region between the peripheral wall portion 641 and the arc-shaped wall portion 662 along the straight line Ln, crossing the tangent line Lm from above to below, to the lower portion of the case 6. Here, the straight line Ln passes between the peripheral wall portion 641 and the arc-shaped wall portion 662 and is perpendicular to the tangent line Lm. The opening 620 is provided along the inner periphery of the peripheral wall portion 61 (joint portion 611) on the vehicle front side of the arc-shaped wall portion 662 of the baffle plate 66.

[0040] In the case 6 of the power transmission device 1, the area below the peripheral wall portion 641 and further forward of the arc-shaped wall portion 662 of the baffle plate 66 tends to become an unused dead space. In this embodiment, the area below the peripheral wall portion 641 and toward the front of the vehicle from the arc-shaped wall portion 662 is provided as a storage portion 67 for arranging the strainer 10 and the mechanical oil pump MOP, thereby preventing the occurrence of dead space.

[0041] 2, in the storage section 67, a connection section 625 of the strainer 10 is provided at a position adjacent to the peripheral wall section 641. When viewed from the direction of the rotation axis X1, the connection section 625 is provided in a positional relationship such that a portion of a lower side area overlaps with the opening section 620.

[0042] An oil passage 626 is connected to the connection port 625a of the connection portion 625. The oil passage 626 extends linearly inside the partition portion 62 in a direction away from the opening 620. The oil passage 626 is connected to the electric oil pump EOP housed in the second chamber S2 via an oil passage in the case 6.

[0043] In the accommodation portion 67, a connection portion 627 for connecting to the mechanical oil pump MOP is provided below the oil passage 626. A connection port 627a of the connection portion 627 communicates with an oil passage 628 provided in the partition portion 62. The oil passage 628 extends below the oil passage 626 along the oil passage 626 toward the housing portion 68 (to the right in the figure). The oil passage 628 is connected to the control valve CV (see FIG. 1) installed in the second chamber S2 via an oil passage in the case 6.

[0044] Fig. 3 is a diagram for explaining the arrangement of the control valve CV in the second chamber S2. In Fig. 3, the second chamber S2 as viewed from the front side of the vehicle is shown typically together with other components of the housing HS (case 6, first cover 7, second cover 8). Also, the area of ​​the joint 683 located on the front side of the page is shown with cross-hatching. Also, the external appearance of the control valve CV and the external appearance of the mechanical oil pump MOP are shown typically.

[0045] 3, when viewed from the front side of the vehicle, the storage section 68 has a wall section 682 and a surrounding wall 681 that surrounds the entire outer periphery of the wall section 682. The area of ​​the wall section 682 that overlaps with the first chamber S1 also serves as a boundary wall between the second chamber S2 and the first chamber S1. The end face of the surrounding wall 681 on the front side of the paper surface forms a joint section 683 with the third cover 9. 1, a joint portion 911 on the third cover 9 side is joined around the entire periphery to the joint portion 683. The accommodation portion 68 and the third cover 9 are connected with bolts (not shown) in a state in which the joint portions 683 and 911 are joined to each other.

[0046] As shown in FIG. 3, the second chamber S2 accommodates a control valve CV and an electric oil pump EOP. 1, the control valve CV has a basic structure in which a separate plate 920 is sandwiched between valve bodies 921, 921. A hydraulic control circuit (not shown) is formed inside the control valve CV. The hydraulic control circuit is provided with a solenoid that is driven based on commands from a control device (not shown), and a pressure regulating valve (spool valve SP) that is operated by a signal pressure generated by the solenoid, etc.

[0047] In the second chamber S2, the control valve CV is disposed vertically with the stacking direction of the valve bodies 921, 921 aligned along the vehicle front-rear direction. 3, in the second chamber S2, the control valve CV is vertically oriented so as to satisfy the following conditions: (a) the multiple spool valves SP in the control valve CV are aligned along a vertical line VL (up-down direction) based on the installation state of the power transmission device 1 on the vehicle V, and (b) the direction Xp of the forward and backward movement of the spool valve SP is oriented along the horizontal line. In this specification, the term "vertical installation" refers to a state in which the control valve CV is installed with the spool valve SP in the control valve shifted in the direction of the vertical line VL. In this state, the stacking direction of the valve bodies 921, 921 of the control valve CV is oriented along the horizontal line (the front-rear direction of the vehicle).

[0048] In this manner, the control valve CV is disposed vertically in the second chamber S2 while the forward and backward movement of the spool valve SP is not hindered, so that the size of the second chamber S2 is not increased in the front-rear direction of the vehicle.

[0049] In the second chamber S2, the control valve CV and the electric oil pump EOP are arranged side by side in the direction of the rotation axis X. When viewed from the front side of the vehicle, the control valve CV is provided in a positional relationship where it overlaps with the first chamber S1. When viewed from the front side of the vehicle, the electric oil pump EOP is provided in a positional relationship where it overlaps with the third chamber S3. The electric oil pump EOP is vertically oriented with the rotation axis X1 of the motor (not shown) perpendicular to the rotation axis X and along the up-down direction.

[0050] The control valve CV is provided with a discharge port 96 for the oil OL discharged from the spool valve SP. Therefore, excess oil OL is discharged from the control valve CV into the second chamber S2 that accommodates the control valve CV, and the oil OL is stored in the second chamber S2. In the second chamber S2, a lower end edge 924 of the control valve CV is provided with a gap between it and the inner periphery 686 of the surrounding wall 681. In the second chamber S2, a communication portion 94 opens at the lowermost portion of the region of the wall portion 682 that overlaps with the first chamber S1. When viewed from the front side of the vehicle, the communication portion 94 opens into the gap between a lower end edge 924 of the control valve CV and the surrounding wall 681. The oil OL between the lower end edge 924 and the surrounding wall 681 can quickly flow into the communication portion 94.

[0051] Furthermore, an opening 95 is provided at the top of the wall portion 682. The opening 95 opens at a position of the wall portion 682 overlapping with the first chamber S1. A lower edge 95a of the opening 95 is located at approximately the same height as an upper edge 925 of the control valve CV. In this manner, the communication portion 94 and the opening 95 respectively connect the second chamber S2 and the first chamber S1. Therefore, the second chamber S2 communicates with the first chamber S1 at the upper and lower portions in the direction of the vertical line VL based on the installation state of the power transmission device 1 on the vehicle V.

[0052] As shown in FIG. 7, in the case 6, oil OL used for operating the power transmission device 1 and for lubricating the components of the power transmission device 1 is stored in the lower part of the first chamber S1. When the power transmission device 1 is in operation, as shown in FIG. 11, oil OL scooped up by a rotating body (such as the final gear 45) in the first chamber S1 flows from the opening 95 into the second chamber S2. The second chamber S2 stores the oil OL flowing in from the opening 95 and the oil OL discharged from the control valve CV. The oil OL in the second chamber S2 passes through a communication part 94 provided in the lower part of the second chamber S2 and is returned to the first chamber S1.

[0053] Fig. 4 is a schematic diagram for explaining the arrangement of the strainer 10 in the housing portion 67. Fig. 4 is a diagram in which the case 6 is cut at the back side of the paper surface in Fig. 2 so that the connection portion between the strainer 10 and the mechanical oil pump MOP is shown in cross section.

[0054] 4, the storage section 67 at the bottom of the first chamber S1 also functions as a storage section for storing the oil OL. In the storage section 67, the strainer 10 is provided with the peripheral wall 13 having the suction port 135 for the oil OL facing the bottom wall portion 613 of the case 6. In the power transmission device 1, when the pump (mechanical oil pump MOP, electric oil pump EOP) is driven, the oil OL stored in the lower part (accommodation section 67) of the first chamber S1 is sucked through the strainer 10 and supplied to the pump side.

[0055] 4, the strainer 10 has a basic configuration in which a filter 19 is disposed in a space S10 formed between an upper case 11 and a lower case 12. The upper case 11 and the lower case 12 are formed of a resin material.

[0056] The upper case 11 is provided with a cylindrical first connection portion 15 and a second connection portion 16 having a circular connection port 17 . The strainer 10 communicates the internal space S10 with the mechanical oil pump MOP by inserting the tip 15a side of the first connection portion 15 into a connection port 120 on the mechanical oil pump MOP side. Furthermore, the second connection portion 16 of the strainer 10 connects the internal space S10 to an oil passage 626 (see FIG. 2) on the case 6 side via a cylindrical member (not shown) inserted across the connection port 17 and a connection portion 625 (see FIG. 2) on the partition wall portion 62 side. The oil passage 626 connects to the electric oil pump EOP (see FIG. 2).

[0057] Therefore, the strainer 10 is shared by the two pumps (the mechanical oil pump MOP and the electric oil pump EOP). When the pumps (the mechanical oil pump MOP and the electric oil pump EOP) are driven, the oil OL stored in the storage portion 67 is sucked into the pumps (the mechanical oil pump MOP and the electric oil pump EOP) through the strainer 10. At this time, the oil OL sucked into the strainer 10 passes through the filter 19, and the oil OL from which impurities have been removed by the filter 19 is sucked toward the pump (mechanical oil pump MOP, electric oil pump EOP).

[0058] FIG. 5 is a plan view of the strainer 10 as viewed from below on the lower case 12 side. In the following description, center line C1 is a straight line passing through approximately the middle in the width direction (vertical direction in the drawing) of strainer 10. Center line C2 is a straight line passing through approximately the middle in the longitudinal direction (horizontal direction in the drawing) of strainer 10 and perpendicular to center line C1. The strainer 10 has a lower case 12 provided with a peripheral wall 13 and magnets 14 (14A, 14B) (second magnets).

[0059] As shown in FIG. 5, in the lower case 12, a peripheral wall 13 is located on the first connection portion 15 side (left side in the figure) when viewed from the center line C2, and a ring-shaped magnet 14 (14A, 14B) is provided on the opposite side. The magnets 14A and 14B are disposed in a symmetrical positional relationship with respect to the center line C1. When there is no need to distinguish between magnets 14A and 14B, they will simply be referred to as "magnet 14."

[0060] The peripheral wall 13 is formed in a cylindrical shape from a first side plate portion 131, a second side plate portion 132, a third side plate portion 133, and a fourth side plate portion . The first side plate portion 131 and the second side plate portion 132 are provided along the center line C2 with a gap between them. The first side plate portion 131 is located closer to the center line C2 than the second side plate portion 132. The third side plate portion 133 and the fourth side plate portion 134 are provided in a direction along the center line C1. The third side plate portion 133 and the fourth side plate portion 134 connect the ends of the first side plate portion 131 and the second side plate portion 132 to each other.

[0061] As shown in FIG. 4, each side plate portion of the peripheral wall 13 (first side plate portion 131, second side plate portion 132, third side plate portion 133, and fourth side plate portion 134) protrudes in the direction of a vertical line VL that extends along the opposing direction between the strainer 10 and the bottom wall portion 613. The first side plate portion 131 and the second side plate portion 132 are inclined at predetermined crossing angles θ131 and θ132, respectively, with respect to the vertical line VL. Here, the crossing angle θ131 of the first side plate portion 131 with respect to the vertical line VL is smaller than the crossing angle θ132 of the second side plate portion 132 with respect to the vertical line VL (θ131<θ132). Therefore, the peripheral wall 13 is formed in a tapered shape in which the width W in the vehicle front-rear direction becomes narrower toward the tip side.

[0062] A tip 131a of the first side plate portion 131 is located above a tip 132a of the second side plate portion 132 in the direction of the vertical line VL. An end portion of the peripheral wall 13 on the bottom wall portion 613 side serves as an oil OL suction port 135. When the power transmission device 1 is installed on the vehicle as a reference, the peripheral wall 13 is provided such that the opening direction of the suction port 135 faces diagonally downward toward the rear of the vehicle. Here, the opening direction of suction port 135 is a direction perpendicular to the opening surface of suction port 135, and the opening surface of suction port 135 means a surface along a straight line L connecting tip 131a of first side plate portion 131 and tip 132a of second side plate portion 132. In this embodiment, this straight line L intersects with a slope relative to a vertical line VL. The straight line L along the opening surface of suction port 135 is inclined such that its position in the direction of the vertical line VL becomes higher as it approaches magnet 14 (the left side in the figure).

[0063] 4, in the case 6, a bulging portion 675 is provided in a region of the bottom wall portion 613 facing the peripheral wall 13 on the strainer 10 side. The bulging portion 675 is formed by recessing the bottom wall portion 613 toward the inside of the case 6. In a cross-sectional view, the bulging portion 675 has a substantially semicircular shape with an apex P facing upward in the direction of the vertical line VL.

[0064] Fig. 6 is a schematic diagram for explaining the arrangement of the strainer 10 and the mechanical oil pump MOP in the housing portion 68. Fig. 6 shows a schematic diagram of the case 6 cut along the line AA in Fig. 4 and the area of ​​the bottom wall portion 613 as viewed from above.

[0065] As shown in FIG. 6, the bulge 675 extends linearly in the vehicle width direction in the area of ​​the bottom wall 613 . In bottom wall portion 613, bulging portion 675 is a region located between joint portion 611 and joint portion 612. Bulging portion 675 extends linearly toward joint portion 612 on the extension of boss portion 615 (see FIG. 2) having bolt hole 615a. Bulging portion 675 is formed to reach the region where partition portion 62 is provided.

[0066] 6, bulging portions 674, 675, 676, and 677 are provided at intervals in the vehicle front-rear direction in bottom wall portion 613. Bulging portions 674, 676, and 677 also extend linearly in the vehicle width direction within the area of ​​bottom wall portion 613. The bulges 674, 676, 677 extend linearly on the extension of the bosses 614, 616, 617 (see FIG. 2) having the bolt holes 614a, 616a, 617a toward the joint 612 (upper side in the figure). As shown in FIG. 4, the bulges 674, 676, 677 are also formed by recessing the bottom wall portion 613 toward the inside of the case 6.

[0067] 4, the strainer 10 disposed in the case 6 has the peripheral wall 13 positioned between the bulging portions 674 and 675 on the bottom wall portion 613 side. In this state, the strainer 10 has the oil OL suction port 135 facing the outer peripheral surface 675b of the bulging portion 675 on the vehicle front side. The peripheral wall 13 positions the tip 132a of the second side plate portion 132 below the apex P of the bulge portion 675 in the direction of the vertical line VL, and positions the tip 131a of the first side plate portion 131 above the apex P of the bulge portion 675 in the direction of the vertical line VL.

[0068] When viewed from the front side of the vehicle (the right side in the figure), tip 132a side of suction port 135 overlaps with the area on the apex P side of bulging portion 675. In other words, tip 132a side of suction port 135 and apex P side of bulging portion 675 are provided in a positional relationship in which they overlap over an area R1 of a predetermined height range.

[0069] Moreover, when viewed from above in the direction of vertical line VL, suction port 135 overlaps with the region on the vehicle front side of bulging portion 675. That is, suction port 135 and the vehicle front side of bulging portion 675 are provided in a positional relationship in which they overlap over a predetermined range of region R2.

[0070] FIG. 7 is a diagram illustrating the rotation transmission mechanism 150. As shown in FIG. As shown in FIG. 2, in the power transmission device 1, the mechanical oil pump MOP is located in a housing portion 68 (on the right side in the figure) when viewed from the strainer .

[0071] 7, the mechanical oil pump MOP is driven by a rotational driving force transmitted via a rotation transmission mechanism 150. The rotation transmission mechanism 150 is made up of a drive sprocket 151, a driven sprocket 152, and a chain 153. As shown in FIG. 1, the drive sprocket 151 rotates about a rotation axis X1 by a rotational driving force input via an impeller sleeve 155 of the torque converter T / C. The impeller sleeve 155 is fitted onto the input shaft 20 of the forward / reverse switching mechanism 2. The input shaft 20 is rotatably supported by a dummy cover 21 that closes the opening of the peripheral wall portion 641. The drive sprocket 151 and the impeller sleeve 155 are rotatably supported by the input shaft 20 of the forward / reverse switching mechanism 2 .

[0072] 7, the rotation input to the drive sprocket 151 is transmitted to the driven sprocket 152 via the chain 153. The driven sprocket 152 rotates around a rotation axis X5 by the transmitted rotation. When the driven sprocket 152 rotates, the rotation axis of the mechanical oil pump MOP to which the driven sprocket 152 is connected rotates, driving the mechanical oil pump MOP. As a result, the oil OL stored in the lower part of the case 6 is sucked into the mechanical oil pump MOP via the strainer 10.

[0073] As shown in FIG. 7, a baffle plate 160 is provided at the bottom of the case 6. The baffle plate 160 is provided to adjust the moving direction of the oil OL scooped up by the driven sprocket 152. The baffle plate 160 is composed of a first cover portion 161 and a second cover portion 165. 6, the side plate portion 162 of the first cover portion 161 is located between the driven sprocket 152 and the mechanical oil pump MOP. The side plate portion 162 is formed to a size sufficient to cover the side surface of the driven sprocket 152. The side plate portion 162 has a peripheral wall portion 163 that surrounds the outer periphery of the driven sprocket 152. As shown in Fig. 7, the peripheral wall portion 163 has an arc shape that surrounds the outer periphery of the driven sprocket 152 on the bottom wall portion 613 side (lower side). The side plate portion 162 has an extension portion 164 that extends toward the final gear 45 side (left side in the figure), and the tip portion of the extension portion 164 is fixed to a peripheral wall portion 641 on the case 6 side by a bolt BL.

[0074] 6, the second cover portion 165 has a side plate portion 166 that covers the side surface of the driven sprocket 152. The side plate portion 166 is a plate-shaped member large enough to cover the side surface of the driven sprocket 152 opposite the mechanical oil pump MOP.

[0075] FIG. 8 is a plan view of the second cover portion 165 of the baffle plate 160. FIG. 9 is a perspective view of the second cover portion 165 of the baffle plate 160. Fig. 10 is a diagram for explaining support of magnet 14C (first magnet) in flange portion 168 of second cover portion 165. Fig. 10 shows a cross section of flange portion 168 taken along line AA in Fig. 8, with first cover portion 161 of baffle plate 160 and magnet 14C shown by imaginary lines.

[0076] As shown in FIGS. 8 and 9, a side plate portion 166 is integrally provided with a connecting piece 167 having a bolt hole 167a, and a flange portion 168 having a bulging portion 168a of the magnet 14C. The connecting piece 167 and the flange portion 168 are provided in a substantially symmetrical positional relationship with respect to the rotation axis X5 of the mechanical oil pump MOP (see FIG. 8). The second cover portion 165 is attached to the case 6 by fixing the connecting piece 167 to the peripheral wall portion 641 on the case 6 side with a bolt BL (see FIG. 7).

[0077] 9 and 10, the flange portion 168 is bent in a direction substantially perpendicular to the side plate portion 166. When the baffle plate 160 is attached to the case 6, the flange portion 168 is disposed in a direction along the rotation axis X5. A bulging portion 168a is provided in the center of the flange portion 168. The bulging portion 168a is formed by causing the flange portion 168 to bulge outward.

[0078] A ring-shaped magnet 14C is fitted onto the outside of the bulging portion 168a for positioning. In this embodiment, at least the second cover portion 165 of the baffle plate 160 is formed of a magnetic material. Therefore, the magnet 14C fitted onto the bulging portion 168a is magnetically attached to the flange portion 168 while being positioned by the bulging portion 168a. This makes it difficult for the magnet 14C to become displaced due to vibrations during the travel of the vehicle V equipped with the power transmission device 1. The flange portion 168 may be provided separately from the side plate portion 166 , and the flange portion 168 made of a magnetic material may be attached to the side plate portion 166 .

[0079] Fig. 11 is a schematic diagram illustrating the action of magnet 14C attached to baffle plate 160. Fig. 12 is a diagram illustrating the movement path of oil OL along bottom wall portion 613 of case 6.

[0080] 11, when baffle plate 160 is placed in case 6, flange portion 168 is disposed opposite a region between adjacent bulging portions 674, 677 in bottom wall portion 613. Flange portion 168 faces bulging portion 674. Therefore, magnet 14C provided on flange portion 168 is disposed opposite bulging portion 674 on the bottom wall portion 613 side. The magnet 14C faces a surface 674b of the bulging portion 674 on the second chamber S2 side with a gap therebetween. The narrowest part of the distance between the magnet 14C and the surface 674b in the facing direction is the gap W674. This gap W674 is narrower than the narrowest gap W160 of the gap between the bottom wall portion 613 of the case 6 and the baffle plate 160 (W160>W674).

[0081] A wall portion 682 is located on the second chamber S2 side as viewed from the baffle plate 160. The wall portion 682 is a boundary wall between the first chamber S1 and the second chamber S2, and a communication portion 94 opens at the lower portion of the wall portion 682. As described above, the oil OL in the second chamber S2 passes through the communication portion 94 and is returned to the first chamber S1.

[0082] 12, the bottom wall 613 of the case 6 is inclined downward in the direction of the vertical line VL as it moves away from the wall 682. Therefore, the oil OL returned to the first chamber S1 through the communication part 94 moves by its own weight along the inclined region (inclined region 613a) of the bottom wall 613 toward the strainer 10. The suction port 135 of the strainer 10 is located at a height h11 below the connecting portion 94. Therefore, the oil OL moving along the inclined region 613a is sucked into the strainer 10 through the suction port 135 located below the connecting portion 94.

[0083] At this time, the oil OL moving in the inclined region 613a passes through the gap between the baffle plate 160 and the bottom wall portion 613 and moves toward the strainer 10 side. Magnet 14C attached to strainer 10 is disposed facing downward on the side of bottom wall portion 613. Magnet 14C faces bulging portion 674 that bulges inward from bottom wall portion 613. Therefore, the magnet 14C is disposed opposite the bottom wall portion 613 on the movement path of the oil OL that is returned from the second chamber S2 to the first chamber S1 and moves toward the strainer 10.

[0084] Here, "facing arrangement" in this specification means that the magnet 14C and the bottom wall portion 613 are arranged to face each other in a direction along a vertical line VL based on the installation state of the power transmission device 1 on the vehicle V. Therefore, when it is stated that the magnet 14C is arranged to face the bottom wall portion 613, it means that the magnet 14C and the bottom wall portion 613 are aligned along the vertical line VL. 11 is the opposing direction between magnet 14C and bulging portion 675. As shown in FIG.

[0085] As shown in FIG. 6, the oil OL returned from the communication portion 94 to the first chamber S1 is attracted to the peripheral wall 13 side of the strainer 10 by the suction force of the pump (electric oil pump EOP, mechanical oil pump MOP).

[0086] Therefore, in the first chamber S1, when viewed from the direction of the vertical line VL, the area between the straight line L94a connecting the connecting portion 94 and the third side plate portion 133 of the peripheral wall 13, and the straight line L94b connecting the connecting portion 94 and the fourth side plate portion 134 of the peripheral wall 13, has the greatest flow rate of oil OL. Furthermore, as shown in FIG. 12, in the first chamber S1, when viewed from the direction of the rotation axis X of the power transmission device, the flow rate of the oil OL is greatest in the region between the straight line L94c and the inclined region 613a of the bottom wall portion 613. Here, the straight line L94c is a straight line that passes through the upper edge of the connecting portion 94 and the upper edge of the suction port 135 of the strainer 10 (the tip 131a of the first side plate portion 131: see FIG. 4). Inside the housing HS (first chamber S1), when the power transmission device 1 is operating, the flow rate of the oil OL becomes the largest in the height range between the inclined region 613a of the bottom wall portion 613 and the straight line L94c in the direction of the vertical line VL.

[0087] In this embodiment, the shape and arrangement of flange portion 168 are set so that at least a portion of magnet 14C supported by flange portion 168 of baffle plate 160 is located in the area between straight line L94a and straight line L94b (the area where oil OL moves: see Figure 6) and in the area between straight line L94c and inclined area 613a (the area where oil OL moves: see Figure 12).

[0088] The function of the magnet 14C provided on the baffle plate 160 will now be described. When the vehicle equipped with the power transmission device 1 travels forward, as shown in FIG. 11, the oil OL stored in the lower part of the first chamber S1 is scooped up by the final gear 45 rotating about the rotation axis X4. 11, the final gear 45 rotates in the clockwise direction CW. Therefore, the oil OL scooped up by the final gear 45 moves in the upper part of the first chamber S1 toward the second chamber S2 (the right side in the figure).

[0089] An opening 95 is provided in an upper portion of the wall portion 682, which is a boundary wall between the first chamber S1 and the second chamber S2. Therefore, most of the oil OL scooped up by the final gear 45 flows from the opening 95 into the second chamber S2. At the bottom of the second chamber S2, a communication portion 94 that communicates with the first chamber S1 opens, so that the oil OL in the second chamber S2 is returned to the first chamber S1.

[0090] Here, in addition to the oil OL flowing in from the first chamber S1, the excess oil OL discharged from the control valve CV is stored in the second chamber S2. The communication portion 94 that opens to the lower portion of the second chamber S2 has an opening diameter smaller than that of the opening 95. Therefore, when the power transmission device 1 is in operation, the height of the oil OL in the second chamber S2 (oil level OL_Level) becomes higher than the height of the oil OL in the first chamber S1 (oil level OL_Level) (see FIG. 11).

[0091] When the vehicle is running, at least one of the electric oil pump EOP and the mechanical oil pump MOP is driven. Therefore, the oil OL in the storage portion 67 in the lower part of the case 6 is sucked into the inside of the strainer 10 through the suction port 135 arranged opposite to the bottom wall portion 613. Therefore, in the container 67, a flow of oil OL toward the suction port 135 is formed (see FIG. 12).

[0092] The oil OL returned from the communication portion 94 to the first chamber S1 moves toward the strainer 10 by the suction force of the pumps (electric oil pump EOP, mechanical oil pump MOP). As shown in FIG. 12, the bottom wall portion 613 of the case 6 has an inclined region 613a in the range from the wall portion 682 to the region where the strainer 10 is provided, the height of which decreases in the vertical line VL direction with increasing distance from the wall portion 682. Therefore, the oil OL returned to the first chamber S1 through the communication portion 94 moves due to its own weight along the bottom wall portion 613 downward toward where the strainer 10 is located. The oil OL moving along the bottom wall portion 613 toward the strainer 10 passes through the gap between the baffle plate 160 and the bottom wall portion 613 and moves to the strainer 10 side.

[0093] Here, the gap between the baffle plate 160 and the bottom wall portion 613 is narrowest in the region where the magnet 14C is provided (see FIG. 11). Therefore, the oil OL that moves from the communication portion 94 side is hindered from moving by the bulging portion 674, and the moving speed becomes slow. Since the magnet 14C is disposed facing the surface 674b of the bulging portion 674, a larger amount of impurities can be captured by the magnet 14C from the oil OL whose moving speed has been reduced. 6, in the first chamber S1, the magnet 14C is located in a region where the flow rate of the oil OL moving from the connecting portion 94 toward the strainer 10 is the largest (region between straight lines L94a and L94b: the movement path of the oil OL). Furthermore, as shown in FIG 12, the magnet 14C is located in a region where the flow rate of the oil OL moving from the connecting portion 94 toward the strainer 10 is the largest (region between straight line L94c and inclined region 613a: the movement path of the oil OL). Therefore, more impurities can be captured by the magnet 14C.

[0094] Furthermore, the storage section 67 in which the strainer 10 is disposed is in communication with the third chamber S3 via an opening 620. The variator 3 is located in the third chamber S3, and oil used for lubricating and cooling the variator 3 moves to the lower part of the third chamber S3 due to its own weight. Therefore, the oil OL that moves to the lower part of the third chamber S3 is returned to the first chamber S1 through the opening 620. In the case of Fig. 12, a flow of the oil OL is generated from the opening 620 that opens to the back side of the page toward the strainer 10 that is located on the front side of the page.

[0095] 6, strainer 10 disposed in case 6 has suction port 135 positioned between bulging portion 674 and bulging portion 675 on the bottom wall portion 613 side. In this state, strainer 10 has suction port 135 for oil OL facing outer peripheral surface 675b (see FIG. 4) on the vehicle front side of bulging portion 675. As shown in FIG. 4, the peripheral wall 13 of the strainer 10 positions the tip 132a of the second side plate portion 132 below the apex P of the bulge portion 675 in the direction of the vertical line VL, and positions the tip 131a of the first side plate portion 131 above the apex P of the bulge portion 675 in the direction of the vertical line VL.

[0096] When viewed from the front side of the vehicle (the right side in FIG. 4), tip 132a side of suction port 135 overlaps with the area on the apex P side of bulging portion 675. That is, tip 132a side of suction port 135 and apex P side of bulging portion 675 are provided in a positional relationship in which they overlap over an area R1 of a predetermined height range.

[0097] Moreover, when viewed from above in the direction of vertical line VL, suction port 135 overlaps with the region on the vehicle front side of bulging portion 675. That is, suction port 135 and the vehicle front side of bulging portion 675 are provided in a positional relationship in which they overlap over a predetermined range of region R2.

[0098] As shown in Figs. 4 and 12, the suction port 135 of the strainer 10 is disposed with its opening facing diagonally downward toward the rear of the vehicle. Therefore, of the oil OL returned to the storage section 67 from the opening 620, the oil OL on the rear side of the vehicle where the magnets 14 (14A, 14B, 14D) are located is more actively sucked into the strainer 10 through the suction port 135 than the oil OL on the front side of the vehicle. When viewed from above in the direction of the vertical line VL, the magnets 14 (14A, 14B, 14D) are located in the middle of the movement path of the oil OL from the rear side of the vehicle toward the suction port 135. Therefore, the oil OL toward the suction port 135 reaches the suction port 135 through the range covered by the magnetic force of the magnets 14 (14A, 14B, 14D).

[0099] Here, the oil OL stored in the lower part inside the case 6 is the oil OL that has been used for lubricating and cooling the power transmission mechanism, and contains impurities (foreign matter) such as metal powder. In this embodiment, the oil OL after passing near the magnet 14 is actively sucked into the strainer 10. Therefore, when the oil OL passes below the magnet 14, foreign matter such as metal powder contained in the oil OL is attracted by the magnetic force of the magnet 14 and captured by the magnet 14. This makes it possible to reduce the amount of foreign matter contained in the oil OL sucked into the strainer 10 from the suction port 135.

[0100] Here, the bulging portion 675 is located between the area where the magnets 14 (14A, 14B) are arranged and the suction port 135. The gap between the strainer 10 and the bottom wall portion 613 in the direction of the vertical line VL is narrowed at the bulging portion 675. Therefore, the flow of the oil OL sucked in from the magnet 14 side is hindered and slowed down at the bulging portion 675. As a result, the flow of the oil OL slows down in the area on the magnet 14 (14A, 14B) side as seen from the bulging portion 675, and foreign matter contained in the oil OL is more likely to be captured by the magnet 14 (14A, 14B). This makes it possible to further reduce the amount of foreign matter contained in the oil OL sucked into the strainer 10.

[0101] As described above, the power transmission device 1 according to this embodiment has the following configuration. (1) A power transmission device 1 includes: A power transmission mechanism (torque converter T / C, forward / reverse switching mechanism 2, variator 3, reduction gear mechanism 4, differential gear 5) that transmits driving force from an engine ENG (drive source) to drive wheels WH, WH; The housing HS (case) that houses the power transmission mechanism, A control valve CV that adjusts the pressure of oil for operating the power transmission mechanism; Pumps that supply oil to the control valve CV (mechanical oil pump MOP, electric oil pump EOP), and a strainer 10 through which the oil OL sucked by the pump passes. In Housing HS, A first chamber S1 in which the strainer 10 is disposed opposite the bottom wall portion 613; a second chamber S2 into which oil OL discharged from a control valve CV flows; A communication portion 94 is provided to communicate between the first chamber S1 and the second chamber S2. In the first chamber S1, on the oil movement path connecting the communication portion 94 and the strainer 10, a magnet 14C (first magnet) is disposed opposite the bottom wall portion 613.

[0102] Excess oil OL discharged from the control valve CV is sucked back into the pump (mechanical oil pump MOP, electric oil pump EOP) via the strainer 10. When configured as described above, the magnet 14C is disposed on the path of movement of the oil OL from the control valve CV side toward the strainer 10. This allows the magnet 14C to capture foreign matter contained in the oil OL, thereby making it possible to suppress the amount of foreign matter contained in the oil OL that flows into the strainer 10.

[0103] (2) The control valve CV has multiple spool valves SP (pressure regulating valves) inside. The control valve CV is disposed vertically within the second chamber S2 of the housing HS with the spool valve SP aligned vertically. In the second chamber S2, a communication portion 94 opens at a position adjacent to a lower end edge 924 (lower portion) of the control valve CV.

[0104] When the control valve CV is disposed vertically and the communication portion 94 is open in the second chamber S2 at a position close to the lower edge 924 (lower portion) of the control valve CV, the oil OL flowing from the control valve CV toward the strainer 10 moves along the bottom wall portion 613 of the housing HS. Therefore, by arranging the magnet 14C facing the bottom wall portion 613, foreign matter contained in the oil OL can be further captured by the magnet.

[0105] (3) The pump is a mechanical oil pump MOP that is driven by the rotational driving force of the drive source. In the housing HS, between the control valve CV and the strainer 10, a rotation transmission mechanism 150 is provided which transmits the rotational driving force of the driving source to the mechanical oil pump MOP. The magnet 14C is provided on a baffle plate 160 that covers the driven sprocket 152 of the rotation transmission mechanism 150.

[0106] With this configuration, the baffle plate 160 is positioned on the path of oil OL moving from the control valve CV side toward the strainer 10. Therefore, by providing the magnet 14C on the baffle plate 160, it is not necessary to prepare a separate part dedicated to installing the magnet 14C. This makes it possible to preferably prevent an increase in costs due to an increase in the number of parts. In addition, because the control valve CV is vertically oriented, there is no iron oil pan covering the opening at the bottom of the case 6. Therefore, the strainer 10 is disposed adjacent to the bottom wall portion 613 of the case 6, but because the case 6 is made of a non-magnetic material such as an aluminum alloy, when the magnet 14C is provided in the case 6, it is necessary to provide a portion for positioning the magnet 14C in the case 6 or to prepare a dedicated positioning part separately. As described above, by providing magnet 14C on baffle plate 160, which is an existing component, there is no need to provide a portion for positioning magnet 14C on case 6 or to prepare a separate dedicated positioning component. Compared to providing a portion for positioning magnet 14C on case 6 or preparing a separate dedicated positioning component, it is expected that the production costs of power transmission device 1 will be reduced.

[0107] (4) The baffle plate 160 has a flange portion 168 on which the magnet 14 is mounted.

[0108] With this configuration, magnet 14C can be easily positioned by forming at least flange portion 168 from a magnetic material. Also, by providing magnet 14C on flange portion 168 extending from baffle plate 160, flange portion 168 can be provided with a size that ensures a contact area with magnet 14C. This increases the contact area between magnet 14C and flange portion 168, making it possible to preferably prevent magnet 14C from falling off flange portion 168.

[0109] (5) The bottom wall portion 613 is provided with bulging portions 674, 675, 676, and 677 that bulge toward the inside of the case 6 and are spaced apart in the circumferential direction of the bottom wall portion 613. The flange portion 168 is provided at a position facing the area between the adjacent bulges 674, 677 on the bottom wall portion 613.

[0110] The bulging portions 674, 675, 676, and 677 bulge toward the inside of the case 6. Therefore, the gap between the baffle plate 160 and the area between the bulging portions adjacent to each other in the arrangement direction of the strainer 10 and the control valve CV is wider than the area where the bulging portions are located. Therefore, when configured as described above, magnet 14C is placed in the widened gap. Magnet 14C is placed by an operator inserting the fingers holding magnet 14C into the gap between bottom wall portion 613 and flange portion 168. Therefore, the installation work of magnet 14C can be performed more easily than when magnet 14C is provided in the gap between bulging portion 674 and baffle plate 160. This makes it possible to preferably prevent a decrease in work efficiency when installing magnet 14C.

[0111] (6) The strainer 10 has a suction port 135 for oil OL at a lower portion facing the bottom wall portion 613. Magnets 14A and 14B (second magnets) are provided at the bottom of the strainer 10. The magnets 14A and 14B are located in the lower part of the strainer 10 on the opposite side of the oil suction port 135 from the control valve CV.

[0112] With this configuration, the magnets 14A and 14B are also disposed on the opposite side of the control valve CV from the oil suction port 135. Therefore, foreign matter contained in the oil OL moving from the opposite side of the control valve CV toward the oil suction port 135 can be captured by the magnets 14A and 14B. This makes it possible to reduce the amount of foreign matter contained in the oil OL that flows into the strainer 10.

[0113] (7) In the first chamber S1, the final gear 45, which is a rotating body that rotates when power is transmitted via the power transmission mechanism, and a baffle plate 66 (second baffle plate) that surrounds the outer periphery of the final gear 45 are provided. The final gear 45 and the baffle plate 66 are located on the opposite side of the strainer 10 from the control valve CV. A magnet 14D (third magnet) is provided on the outer periphery of the baffle plate 66.

[0114] In the first chamber S1, the oil OL before being sucked into the strainer 10 is stored in the lower part on the baffle plate 66 side. By providing the magnet 14D on the outer periphery of the baffle plate 66, foreign matter contained in the oil OL before being sucked into the strainer 10 can be more suitably removed.

[0115] (i) The rotation transmission mechanism 150 has a driven sprocket 152 that rotates around the rotation axis X5 of the mechanical oil pump MOP, and a chain 153 that is wound around the outer periphery of the driven sprocket 152. The baffle plate 160 has a first cover portion 161 covering one side surface of the driven sprocket 152 in the direction of the rotation axis X5, a second cover portion 165 covering the other side surface of the driven sprocket 152 in the direction of the rotation axis X5, and a peripheral wall portion 163 covering the outer periphery of the chain 153. The peripheral wall portion 163 is provided on the first cover portion 161. The second cover portion 165 is provided with a flange portion 168 to which the magnet 14C is attached.

[0116] With this configuration, the flange portion 168 can be provided at any position on the baffle plate 160 without impairing the function of the baffle plate 160. This improves the degree of freedom in installing the magnet 14C.

[0117] (ii) The flange portion 168 is provided with a bulge 168a that serves as an engagement portion for the magnet 14C.

[0118] For example, when magnet 14C is ring-shaped, magnet 14C can be positioned at a desired position by providing flange portion 168 with a locking portion of a size that can be inserted into an opening in the center of magnet 14C. Furthermore, by inserting the locking portion into the opening, magnet 14C can be suitably prevented from being displaced due to vibrations while vehicle V equipped with power transmission device 1 is traveling.

[0119] (iii) The magnet 14C supported by the flange portion 168 is provided facing the bulge 674 located between the strainer 10 and the flange portion 168. The magnet 14C faces a surface 674b of the bulging portion 674 on the control valve CV side with a gap W674 therebetween.

[0120] The flow of oil OL from the control valve CV toward the strainer 10 is obstructed at the bulge 674. With the above-described configuration, the flow of the oil OL is obstructed at the bulge 674 and slows down, and the oil OL whose movement is obstructed passes closer to the magnet 14C. This allows the magnet 14C to more appropriately capture foreign matter contained in the oil OL.

[0121] (iv) The bottom wall portion 613 is provided with an inclined region 613a whose height in the direction of the vertical line VL based on the installation state of the power transmission device 1 on the vehicle V decreases from the connecting portion 94 toward the strainer 10 side. The magnet 14C is located below the connecting portion 94 in the direction of the vertical line VL.

[0122] The oil OL that flows into the first chamber S1 through the connecting portion 94 moves along the inclined region 613a toward the strainer 10 due to its own weight. When the power transmission device 1 transmits power, a rotating body such as the final gear 45 scoops up the oil OL in the first chamber S1, lowering the level of the oil in the first chamber S1. The area between the straight line L94c (see FIG. 12) passing through the upper edge of the connecting portion 94 and the inclined region 613a, and the area between the straight lines L94a and L94b (see FIG. 6) are the movement paths of the oil OL from the connecting portion 94 toward the suction port 135 of the strainer 10, and are the areas where the flow rate of the oil is high. With the above configuration, the oil OL that has flowed into the first chamber S1 can be quickly moved toward the strainer 10, reducing the possibility of air being sucked into the oil pump. Furthermore, since the magnet 14C can be positioned so as to be submerged in the oil, foreign matter contained in the oil OL can be appropriately removed.

[0123] (v) When viewed from the direction of the rotation axis X of the power transmission device 1, a portion of the strainer 10 is provided in a positional relationship overlapping with the opening 620. When viewed from the opening 620, the baffle plate 66 is located on the opposite side to the mechanical oil pump MOP. The baffle plate 66 has an arcuate wall portion 662 whose outer periphery is located near the periphery of the opening 620 . The magnet 14D is attached to the outer periphery of the arc-shaped wall portion 662 and faces an area of ​​the bottom wall portion 613 of the case 6 that is located below the strainer 10.

[0124] The oil OL that has moved to the lower part of the third chamber S3 that houses the variator 3 passes through an opening 620 that connects the lower part of the third chamber S3 and the lower part of the first chamber S1, and is returned to the first chamber S1. A portion of the oil OL returned to the first chamber S1 moves toward the suction port 135 of the strainer 10 through the baffle plate 66 side (left side in FIG. 12) and the baffle plate 160 side (right side in FIG. 12) as viewed from the strainer 10. With the above configuration, magnets 14A, 14B, and magnet 14D are positioned on the baffle plate 66 side when viewed from suction port 135. This allows foreign matter contained in oil OL flowing from the baffle plate 66 side toward suction port 135 to be properly removed.

[0125] In the embodiment described above, the magnet 14C is disposed facing the bulging portion 674. The magnet 14C may be disposed in another position as long as the magnet 14C can appropriately remove foreign matter contained in the oil OL moving toward the strainer 10. Therefore, it is sufficient that the magnet 14C is disposed facing the gap between the baffle plate 160 and the bottom wall portion 613. Therefore, if the magnet 14C is disposed at any position within the angle range indicated by the reference symbol R14 in FIG. 12, foreign matter contained in the oil OL moving toward the strainer 10 can be appropriately removed. In particular, since the area between adjacent bulges 674, 677 is an area where the movement speed of the oil OL decreases and the oil OL is likely to stagnate, it is preferable that the magnet 14C is provided facing the bottom wall portion 613 between the bulges 674 and 677.

[0126] In the above embodiment, the power transmission device 1 transmits the rotation of the engine ENG to the drive wheels WH, WH, but the power transmission device 1 may transmit the rotation of at least one of the engine ENG and a motor (rotating electric machine) to the drive wheels WH, WH. For example, the power transmission device 1 may be of a one-motor, two-clutch type (a type in which a motor is disposed between the engine ENG and the power transmission device, a first clutch is disposed between the engine ENG and the motor, and a second clutch is disposed within the power transmission device 1). In the above embodiment, the power transmission device 1 has a speed change function, but the power transmission mechanism may not have a speed change function and may simply decelerate (or may increase) the speed. In the case where the power transmission device does not have a speed change function and is configured to reduce the speed of the motor and transmit the rotation to the drive wheels WH, WH, a hydraulic control circuit for supplying oil OL for cooling the motor and oil OL for lubricating the speed reduction mechanism is disposed in the second chamber S2 together with the electric oil pump EOP. In the above embodiment, the control unit of the power transmission device 1 has a control valve CV, but in the case where the power transmission device 1 does not have a speed change mechanism and the drive source is a motor (rotating electric machine) instead of the engine ENG, the control unit may have an inverter or the like for driving and controlling the motor.

[0127] Although the embodiments of the present invention have been described above, the present invention is not limited to the aspects shown in these embodiments and can be modified as appropriate within the scope of the technical concept of the invention. [Explanation of symbols]

[0128] 1 Power transmission device 2. Forward / reverse switching mechanism (power transmission mechanism) 3 Variator (power transmission mechanism) 4. Reduction mechanism (power transmission mechanism) 45 Final Gear 5 Differential (power transmission mechanism) 6 Cases 66 Baffle plate (second baffle plate) 613 Bottom wall 674~677 Bulge 94 Liaison Department 924 Bottom edge 10 Strainer 135 Intake port (suction port) 14. Magnets 14A, 14B Magnets (second magnets) 14C Magnet (first magnet) 14D Magnet (third magnet) 150 Rotational transmission mechanism 152 Driven sprocket 160 Baffle Plate 168 Flange CV Control Valve HS housing (case) MOP Mechanical Oil Pump (Pump) EOP Electric Oil Pump (Pump) ENG Engine (power source) S1 Room 1 S2 Room 2 SP spool valve (pressure regulating valve)

Claims

1. a case that houses a power transmission mechanism; a control valve that adjusts the pressure of oil for operating the power transmission mechanism; a pump for supplying oil to the control valve; a strainer through which the oil drawn by the pump passes, In the case, A first chamber in which the strainer is disposed opposite a bottom wall portion; a second chamber into which the oil discharged from the control valve flows; A communication portion is provided to communicate the first chamber and the second chamber, A power transmission device, wherein a first magnet is disposed in the first chamber, facing the bottom wall portion, on a path of oil movement connecting the communication portion and the strainer.

2. In claim 1, The control valve has a plurality of pressure regulating valves therein, The control valve is disposed in the case such that the pressure regulating valve is aligned vertically, A power transmission device, wherein the communication portion opens into the second chamber at a position adjacent to a lower portion of the control valve.

3. In claim 1 or 2, the pump is a mechanical oil pump driven by a rotational driving force of a driving source, a rotation transmission mechanism for transmitting the rotational driving force to the mechanical oil pump is provided between the control valve and the strainer, A power transmission device, wherein the first magnet is provided on a baffle plate that covers the rotation transmission mechanism.

4. In claim 3, A power transmission device, wherein the baffle plate has a flange portion on which the first magnet is mounted.

5. In claim 4, The bottom wall portion is provided with bulging portions spaced apart from each other and bulging toward the inside of the case. The flange portion is provided at a position facing a region between adjacent ones of the bulging portions.

6. In claim 5, The strainer has an oil suction port at a lower portion facing the bottom wall portion, A second magnet is provided at the bottom of the strainer. A power transmission device, wherein the second magnet is located at the lower part of the strainer on the opposite side to the control valve as viewed from the oil suction port.

7. In claim 6, The first chamber is provided with a rotor that rotates when power is transmitted, and a second baffle plate that surrounds an outer periphery of the rotor, the rotor and the second baffle plate are located on the opposite side of the strainer from the control valve, A power transmission device, wherein a third magnet is provided on an outer periphery of the second baffle plate.

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