Power transmission device

Abstract

And stable supporting of the filter is ensured. This power transmission device for a vehicle is provided with: a housing that accommodates a power transmission mechanism; a partition wall portion that supports the power transmission mechanism and partitions the inside of the housing; a filter disposed at the lower part of the housing; and a pump supported by the partition wall portion, in which a first chamber located on one side of the partition wall portion in the direction of the rotation axis of the power transmission device and a second chamber located on the other side of the partition wall portion in the direction of the rotation axis of the power transmission device are provided in the housing. The filter has a first connection port connected to the pump, and a second connection port connected to a second oil passage in the partition wall portion, and the second connection port is connected to the second oil passage in an assembly direction from the pump to the partition wall portion.

Description

Technical Field

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

[0002] Patent Document 1 discloses a drive device for a vehicle.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: (Japanese) Patent Publication No. 2015-045401 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In this driving device, a filter for filtering oil sucked by the mechanical oil pump and the electric oil pump is provided in a cantilever-supported state at the mechanical oil pump.

[0008] When a vehicle equipped with a power transmission device is running, vibration caused by the running of the vehicle is transmitted to the filter. Therefore, it is preferable that the filter is supported more stably.

[0009] However, if the support stability of the filter is to be ensured, there is a possibility that the housing of the power transmission device will become larger due to an increase in the number of parts and the like.

[0010] Therefore, it is required to ensure stable support of the filter without increasing the size of the housing.

[0011] Technical solutions for solving technical problems

[0012] One embodiment of the present invention is a power transmission device, which is a power transmission device for a vehicle, comprising: a housing that accommodates a power transmission mechanism; a partition wall portion that supports the power transmission mechanism and divides the inside of the housing; a filter that is arranged at the lower part of the housing; a pump that is supported by the partition wall portion, wherein the housing is provided with: a first chamber that is located on one side of the partition wall portion in the direction of the rotation axis of the power transmission device; a second chamber that is located on the other side of the partition wall portion in the direction of the rotation axis of the power transmission device, the filter having: a first connection port that is connected to the pump; a second connection port that is connected to a second oil circuit in the partition wall portion, the second connection port being connected to the second oil circuit in an assembly direction from the pump toward the partition wall portion.

[0013] Effects of the Invention

[0014] According to one aspect of the present invention, the supporting stability of the filter is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram for explaining the arrangement of a power transmission device in a vehicle.

[0016] Figure 2 It is a schematic diagram showing a schematic structure of a power transmission device.

[0017] Figure 3 This is a diagram of the housing as viewed from the second cover side.

[0018] Figure 4 This is a diagram of the housing as viewed from the first cover side.

[0019] Figure 5 It is a cross-sectional view for explaining the housing portion.

[0020] Figure 6 It is a cross-sectional view for explaining the housing portion.

[0021] Figure 7 It is a diagram illustrating a filter.

[0022] Figure 8 It is a diagram illustrating a filter.

[0023] Fig. 9 It is a diagram for explaining the support structure of the mechanical oil pump in the partition wall portion.

[0024] Fig.10 It is a diagram for explaining the process of mounting the filter and the mechanical oil pump to the partition wall portion. DETAILED DESCRIPTION

[0025] First, the definitions of terms used in this specification are explained.

[0026] The power transmission device is a device having 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 speed reduction mechanism.

[0027] In the following embodiment, the power transmission device 1 is exemplified as having a function of transmitting the output rotation of the engine, but the power transmission device 1 only needs to transmit the output rotation of at least one of the engine and the motor (rotating electric machine).

[0028] “Overlapping when viewed in a predetermined direction” means that a plurality of components are arranged in a predetermined direction, which is synonymous with the case where it is described as “overlapping in a predetermined direction”. The “prescribed direction” may be, for example, the axial direction, radial direction, gravity direction (direction of the vertical line VL), vehicle travel direction (vehicle forward direction, vehicle backward direction), etc.

[0029] When a plurality of members (components, parts, etc.) are shown in a drawing as being arranged in a predetermined direction, the description in the specification may be regarded as including a description that they overlap when viewed in the predetermined direction.

[0030] “Not overlapping when viewed in a specified direction” or “offset when viewed in a specified direction” means that a plurality of components are not arranged in a specified direction, and is synonymous with the case where it is described as “not overlapping in a specified direction” or “offset in a specified direction”. The “specified direction” may be, for example, the axial direction, radial direction, gravity direction, vehicle travel direction (vehicle forward direction, vehicle backward direction), etc.

[0031] When a plurality of members (components, parts, etc.) are shown in a drawing as not being aligned in a predetermined direction, the description in the specification may be regarded as indicating that they do not overlap when viewed in the predetermined direction.

[0032] “When observed from a specified direction, the first member (component, part, etc.) is located between the second member (component, part, etc.) and the third member (component, part, etc.)” means that when observed from a specified direction, the first member can be observed to be located between the second member and the third member. “Specified direction” refers to the axial direction, radial direction, gravity direction, vehicle travel direction (vehicle forward direction, vehicle backward direction), etc.

[0033] For example, when the second member, the first member, and the third member are arranged in sequence along the axial direction, it can be said that the first member is located between the second member and the third member when viewed in the radial direction. In the attached drawings, when the first member is shown to be between the second member and the third member when viewed in a specified direction, it can be regarded as a description in the specification that the first member is located between the second member and the third member when viewed in the specified direction.

[0034] Two components (parts, sections, etc.) are coaxial when they overlap when viewed axially.

[0035] “Axial direction” refers to the axial direction of the rotation axis of a component constituting the power transmission device. “Radial direction” refers to the direction orthogonal to the rotation axis of a component constituting the power transmission device. Examples of the component are a motor, a gear mechanism, a differential gear mechanism, and the like.

[0036] The “downstream side in the rotation direction” refers to the downstream side in the rotation direction when the vehicle is moving forward or the rotation direction when the vehicle is moving backward. It is preferably the downstream side in the rotation direction when the vehicle is moving forward, which is the most frequent direction.

[0037] The "vertical placement" of the control valve means that, in the case of a control valve having a basic structure in which a partition plate is sandwiched between valve cores, the valve cores 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" mentioned here does not mean a strictly horizontal direction, but also includes a case where the stacking direction is inclined relative to the horizontal line.

[0038] The “vertical placement” of the control valve means that the control valve is arranged in a direction in which a plurality of pressure regulating valves (valve bodies) in the control valve are arranged in a line in the direction of a vertical line VL based on the installation state of the power transmission device in the vehicle.

[0039] “A plurality of pressure regulating valves are arranged 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.

[0040] In this case, the plurality of pressure regulating valves do not need to be strictly arranged in a row in the direction of the vertical line VL.

[0041] For example, when a control valve is formed by stacking a plurality of valve bodies, in a vertically arranged control valve, a plurality of pressure regulating valves may be arranged in the direction of the vertical line VL while being shifted in the stacking direction of the valve bodies.

[0042] Furthermore, when viewed from the axial direction (advance and retreat direction) of the valve body included in the pressure regulating valve, the plurality of pressure regulating valves do not need to be arranged at intervals in the direction of the vertical line VL.

[0043] When viewed in the axial direction (advance and retreat direction) of the valve body included in the pressure regulating valve, the plurality of pressure regulating valves do not need to be adjacent to each other in the direction of the vertical line VL.

[0044] Therefore, for example, when the pressure regulating valves arranged in the direction of the vertical line VL are staggered in the stacking direction (horizontal direction) of the valve core, this also includes the case where the adjacent pressure regulating valves in the direction of the vertical line VL are arranged in a positional relationship where they partially overlap when viewed from the stacking direction.

[0045] Furthermore, when the control valve is “vertically disposed”, it means that the plurality of pressure regulating valves in the control valve are disposed in such a manner that the movement direction of the valve bodies (spool valves) included in the pressure regulating valves is along the horizontal direction.

[0046] The moving direction of the valve body (sliding valve) in this case is not limited to the horizontal direction in a strict sense. The moving direction of the valve body (sliding valve) in this case is along the rotation axis X of the power transmission device. In this case, the rotation axis X direction is the same as the sliding direction of the valve body (sliding valve).

[0047] Hereinafter, embodiments of the present invention will be described.

[0048] Figure 1 1 is a schematic diagram for explaining the arrangement of the power transmission device 1 in the vehicle V.

[0049] Figure 2 It is a schematic diagram for explaining a schematic structure of the power transmission device 1 .

[0050] like Figure 1As shown, the power transmission device 1 is disposed between left and right frames FR, FR at the front of the vehicle V. A housing HS of the power transmission device 1 is constituted by a case 6 , a first cover 7 , a second cover 8 , and a third cover 9 .

[0051] like Figure 2 As shown, a torque converter T / C, a forward / reverse switching mechanism 2, a speed change mechanism 3, a reduction mechanism 4, a differential device 5, an electric oil pump EOP, a mechanical oil pump MOP, a control valve CV, etc. are accommodated inside the housing HS.

[0052] In the power transmission device 1 , output rotation of an engine ENG (driving source) is input to a forward / reverse travel switching mechanism 2 via a torque converter T / C.

[0053] The rotation input to the forward / reverse travel switching mechanism 2 is input to the primary pulley 31 of the speed change mechanism 3 through forward rotation or reverse rotation.

[0054] In the speed change mechanism 3 , by changing the winding radius of the belt 30 in the primary pulley 31 and the secondary pulley 32 , the rotation input to the primary pulley 31 is speed-changed at a desired speed ratio and output from the output shaft 33 of the secondary pulley 32 .

[0055] The output rotation of the secondary pulley 32 is input to the differential device 5 (differential gear mechanism) via the speed reduction mechanism 4 , and then transmitted to the drive wheels WH, WH via the left and right drive shafts 55A, 55B.

[0056] The speed reduction mechanism 4 includes an output gear 41 , an idler gear 42 , a speed reduction gear 43 , and a final drive gear 45 .

[0057] The output gear 41 rotates integrally with the output shaft 33 of the secondary pulley 32 .

[0058] The idler gear 42 meshes with the output gear 41 in a rotationally transmittable manner. The idler gear 42 is splined with the idler shaft 44 and rotates integrally with the idler shaft 44. The idler shaft 44 is provided with a reduction gear 43 having a smaller diameter than the idler gear 42. The reduction gear 43 meshes with a final drive gear 45 fixed to the outer periphery of the differential case 50 of the differential device 5 in a rotationally transmittable manner.

[0059] 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 coaxially (concentrically) arranged on the rotation axis X1 (first axis) of the primary pulley 31 .

[0060] The output shaft 33 of the secondary pulley 32 and the output gear 41 are coaxially arranged on the rotation axis X2 (second axis) of the secondary pulley 32 .

[0061] The idler gear 42 and the reduction gear 43 are coaxially arranged on a common rotation axis X3.

[0062] The final drive gear 45 and the drive shafts 55A and 55B are coaxially arranged on a common rotation axis X4. In the power transmission device 1, these rotation axes X1 to X4 are set in a mutually parallel positional relationship. Hereinafter, as needed, these rotation axes X1 to X4 are also collectively referred to as the rotation axis X of the power transmission device 1 (power transmission mechanism).

[0063] Figure 3 It is a plan view of the housing 6 as seen from the second cover 8 side. Figure 4 7 is a top view of the housing 6 as viewed from the first cover 7 side. Figure 3 In the enlarged view of FIG. 1 , the filter 10 and the mechanical oil pump MOP are omitted, and the connection parts 625 and 627 provided in the partition wall part 62 are shown. Figure 3 The enlarged image and Figure 4 In order to easily identify the position of the opening 620, the area of ​​the opening 620 is indicated by cross hatching.

[0064] Figure 5 It will follow Figure 3 FIG. 2 is an enlarged cross-sectional view of the main parts of the case 6 cut along line AA in FIG. Figure 6 It will follow Figure 5 FIG. 2 is an enlarged cross-sectional view of the main parts of the case 6 cut along line AA in FIG. Figure 7 This is a top view of the filter 10 as viewed from above the upper housing 101. Figure 7 In the enlarged view of FIG. 1 , in order to easily identify the positional relationship between the exhaust path 107 and the exhaust path 109 in the filter 10 , the peripheries of the exhaust path 107 and the exhaust path 109 are shown in cross section. Figure 8 This is a perspective view of the filter 10 as viewed obliquely from above the upper case 101 side.

[0065] like Figure 3 As shown, the housing 6 has a cylindrical peripheral wall portion 61 and a partition wall portion 62. The partition wall portion 62 is provided in a range that crosses the rotation axis (rotation axis X1 to rotation axis X4) of the power transmission mechanism.

[0066] like Figure 2 As shown, the partition wall 62 divides the inner space of the peripheral wall 61 into two in the direction of the rotation axis X1. One side of the partition wall 62 in the direction of the rotation axis X1 is the first chamber S1, and the other side is the second chamber S2.

[0067] The first chamber S1 accommodates the forward / reverse switching mechanism 2, the speed reduction mechanism 4, and the differential device 5. The second chamber S2 accommodates the speed change mechanism 3.

[0068] In the housing 6, the opening on the first chamber S1 side is sealed by the second cover 8 (torque converter cover). The opening on the second chamber S2 side is sealed by the first cover 7 (side cover).

[0069] In the housing 6 , oil used for the operation of the power transmission device 1 and lubrication of components of the power transmission device 1 is stored in the lower portion of the space (the first chamber S1 , the second chamber S2 ) between the first cover 7 and the second cover 8 .

[0070] like Figure 3 As shown in FIG. 1 , the end surface of the housing 6 on the second cover 8 side (the front side of the paper) becomes a joint 611 with the second cover 8. The joint 611 is a flange-shaped portion that surrounds the opening on the second cover 8 side of the partition wall portion 62 over the entire circumference. In the joint 611, the joint 811 on the second cover 8 side is joined over the entire circumference (see FIG. 1 ). Figure 2 The housing 6 and the second cover 8 are connected by bolts (not shown) in a state where the joint portions 611 and 811 are joined to each other. Thus, the opening of the housing 6 is kept sealed by the second cover 8, forming a closed first chamber S1.

[0071] like Figure 3 As shown, in the housing 6 , the partition wall portion 62 is located inside the joint portion 611 .

[0072] The partition wall portion 62 of the housing 6 is provided in a direction substantially perpendicular to the rotation axis (rotation axis X1 to X4 ). The partition wall portion 62 is provided with through holes 621 , 622 , 624 and a support hole 623 .

[0073] The through hole 621 is formed with the rotation axis X1 as the center. 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 are provided on the surface of the partition wall portion 62 on the first chamber S1 side (the front side of the paper). Figure 3 , the supporting wall portion 631 and the peripheral wall portion 641 are toward the front side of the paper surface ( Figure 2 The second cover 8 side) protrudes.

[0074] The region 651 between the support wall portion 631 and the peripheral wall portion 641 is a cylindrical space that accommodates a piston (not shown), friction plates (forward clutch, reverse brake), and the like of the forward / reverse switching mechanism 2 .

[0075] The input shaft 34 of the primary pulley 31 is rotatably supported on the inner periphery of the support wall portion 631 via a bearing B (see Figure 2 ).

[0076] like Figure 3 As shown, the through hole 622 is formed with the rotation axis X2 as the center.

[0077] In the power transmission device 1 mounted on the vehicle V, the rotation axis X2 is located obliquely above the rear side of the vehicle when viewed from the rotation axis X1.

[0078] A cylindrical support wall portion 632 surrounding the through hole 622 is provided on the surface of the partition wall portion 62 on the first chamber S1 side (front side on the paper). Figure 3 , the support wall portion 632 is toward the front side of the paper ( Figure 2 The second cover 8 side) protrudes.

[0079] The output shaft 33 of the secondary pulley 32 is rotatably supported on the inner periphery of the support wall portion 631 via a bearing B (see Figure 2 ).

[0080] like Figure 3 As shown, the support hole 623 is a bottomed hole formed with the rotation axis X3 as the center.

[0081] In the power transmission device 1 mounted on the vehicle V, the rotation axis X3 is located obliquely above the vehicle rear side when viewed from the rotation axis X1 , and is located obliquely below the vehicle rear side when viewed from the rotation axis X2 .

[0082] A cylindrical support wall portion 633 surrounding the support hole 623 is provided on the surface of the partition wall portion 62 on the first chamber S1 side (front side in the drawing). Figure 3 , the support wall portion 633 is toward the front side of the paper ( Figure 2 The support wall portion 633 surrounds the outer periphery of the support hole 623 at intervals. The idler shaft 44 of the speed reduction mechanism 4 is rotatably supported via the bearing B on the inner periphery of the support wall portion 633 (see FIG. 1 ). Figure 2 ) on one end side.

[0083] like Figure 3 As shown, the through hole 624 is formed with the rotation axis X4 as the center.

[0084] In the power transmission device 1 mounted on the vehicle V, the rotation axis X4 is located obliquely below the rear side of the vehicle when viewed from the rotation axis X1, the rotation axis X4 is located obliquely below the rear side of the vehicle when viewed from the rotation axis X2, and the rotation axis X4 is located obliquely below the front side of the vehicle when viewed from the rotation axis X3.

[0085] A cylindrical support wall portion 634 surrounding the through hole 624 is provided on the surface of the partition wall portion 62 on the first chamber S1 side (front side in the drawing). Figure 3 , the support wall portion 634 is toward the front side of the paper ( Figure 2 The support wall portion 634 surrounds the outer periphery of the through hole 624 at intervals. The differential case 50 (see FIG. 1 ) of the differential device 5 is rotatably supported via the bearing B on the inner periphery of the support wall portion 634. Figure 2 ).

[0086] like Figure 2As shown, a final gear 45 having an annular 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.

[0087] like Figure 3 As shown, a baffle 66 is installed on the surface of the partition wall portion 62 on the first chamber S1 side (near the front side of the paper) below the through hole 624. When viewed from the direction of the rotation axis X4, the baffle 66 is in a semicircular shape with a curved surface facing downward, and has a side plate portion 661 covering both side surfaces in the direction of the rotation axis X4 of the final transmission gear 45 and an arc-shaped wall portion 662 covering the radial outer periphery of the rotation axis X4 (see FIG. Fig.10 ). In addition, Figure 3 In the figure, the side plate portion 661 near the front side of the paper is omitted.

[0088] In the housing 6 , a region on the vehicle front side relative to the arcuate wall portion 662 of the baffle 66 , that is, a region below the arcuate peripheral wall portion 641 serves as a housing portion 67 for the resin filter 10 .

[0089] like Figure 5 As shown, the accommodating portion 67 is opened toward the first chamber S1 side ( Figure 5 The bottomed space on the right side of the image.

[0090] The lower region Rx of the partition wall portion 62 on the side of the peripheral wall portion 61 of the housing 6 becomes the bottom wall portion in the direction of the rotation axis X1 of the accommodating portion 67. In the direction of the rotation axis X1, the lower region Rx is located closer to the second chamber S2 side (left side in the figure) than the partition wall portion 62. That is, when viewed from the radial direction of the rotation axis X1, the partition wall portion 62 and the lower region Rx are arranged at offset positions in the direction of the rotation axis X1.

[0091] Therefore, the accommodation portion 67 is formed in the lower portion of the housing 6 in a range that crosses below the region 651 (recessed portion) that accommodates the forward / reverse travel switching mechanism 2 in the direction of the rotation axis X1.

[0092] The lower region Rx is provided with an opening 620 that penetrates the lower region Rx in the direction of the rotation axis X1. The first chamber S1 and the second chamber S2 in the housing 6 communicate with each other through the opening 620.

[0093] like Figure 3 As shown, the opening 620 is provided at a position intersecting with a tangent line Lm when viewed from the direction of the rotation axis X1. The tangent line Lm is a straight line connecting the outer periphery of the peripheral wall portion 641 and the outer periphery of the arc-shaped wall portion 662 of the baffle 66.

[0094] The opening 620 is formed in a range from the area between the peripheral wall 641 and the arcuate wall 662 along the straight line Ln from the top to the bottom across the tangent line Lm to the lower part of the housing 6. Here, the straight line Ln is a straight line passing between the peripheral wall 641 and the arcuate wall 662 and perpendicular to the tangent line Lm.

[0095] In the power transmission device 1 , the region between the peripheral wall portion 641 and the arc-shaped wall portion 662 tends to become an unused dead space, but the opening portion 620 is provided to effectively utilize the dead space.

[0096] like Figure 5 As shown, in the lower region Rx, a connection portion 625 of the filter 10 is provided at a position adjacent to the peripheral wall portion 641 in the radial direction of the rotation axis X1. The connection portion 625 is a cylindrical portion with a connection port 625a facing the second cover 8 side (first chamber S1).

[0097] like Figure 3 As shown, when viewed from the rotation axis X1 direction, the connection portion 625 is provided so that a portion of the lower side overlaps with the opening 620. When viewed from the rotation axis X1 direction, a portion of the lower side of the connection portion 625 protrudes into the opening 620.

[0098] like Figure 5 As shown, an oil passage 626 is opened on the inner side of the connecting portion 625 .

[0099] like Figure 3 As shown, the oil passage 626 extends linearly in the direction away from the opening 620 in the partition wall portion 62. The oil passage 626 is connected to the electric oil pump EOP housed in the housing portion 68 described later via the oil passage in the housing 6.

[0100] In the housing portion 67, a connection portion 627 connected to the mechanical oil pump MOP is provided below the oil passage 626. A connection port 627a of the connection portion 627 opens in the same direction as the connection portion 625 connected to the filter 10. The connection port 627a of the connection portion 627 communicates with an oil passage 628 (first oil passage) provided in the partition wall portion 62.

[0101] The oil passage 628 extends the lower side of the oil passage 626 toward the housing portion 68 (right side in the figure) along the oil passage 626. The oil passage 628 is connected to the control valve CV (see FIG. 1 ) provided in the housing chamber S3 described later via the oil passage in the housing 6. Figure 2 ) connected.

[0102] like Figure 2 As shown, a storage portion 68 with its opening facing the vehicle front side is provided on the side surface on the vehicle front side of the housing 6. The storage chamber S3 is formed by sealing the opening of the storage portion 68 with the third cover 9.

[0103] The accommodating portion 68 and the third cover 9 are fastened together by bolts (not shown) with the joint portions 683 and 911 being joined to each other. Thus, a closed accommodating chamber S3 is formed on the side surface of the housing 6 on the vehicle front side.

[0104] A control valve CV and an electric oil pump EOP are vertically arranged in the accommodation chamber S3.

[0105] The control valve CV has a basic structure in which a partition plate 920 is sandwiched between valve cores 921, 921. A hydraulic control circuit (not shown) is formed inside the control valve CV. The hydraulic control circuit is provided with a solenoid driven based on a command from a control device (not shown), and a pressure regulating valve SP (spool valve) operated by a signal pressure generated by the solenoid.

[0106] In the storage chamber S3, the valve CV is controlled so that the stacking direction of the valve elements 921, 921 is vertically oriented along the vehicle front-rear direction (paper surface, up-down direction).

[0107] In the storage chamber S3, the control valve CV is arranged vertically in a manner that satisfies the following conditions. (a) The plurality of pressure regulating valves SP (slide valves) in the control valve CV are arranged in a vertical direction (vertical direction) based on the installation state of the power transmission device 1 on the vehicle V (see Figure 3 ), (b) the forward and backward movement direction Xp of the pressure regulating valve SP (slide valve) becomes a direction along the horizontal line direction (refer to Figure 3 ).

[0108] Thus, the forward and backward movement of the pressure regulating valve SP (spool valve) is not hindered, and the control valve CV is vertically arranged in the accommodation chamber S3. Therefore, the accommodation chamber S3 is not enlarged in the vehicle front-rear direction.

[0109] The electric oil pump EOP is disposed vertically so that the rotation axis of the motor (not shown) is oriented along the direction of the vertical line VL.

[0110] like Figure 2 As shown, the electric oil pump EOP and the control valve CV are arranged in the direction of the rotation axis X of the power transmission mechanism.

[0111] like Figure 3 As shown, in the lower part of the housing 6, the opening 620 is provided on the lower side of the peripheral wall 641. The opening 620 is provided along the inner periphery of the peripheral wall 61 (joint portion 611) at a position closer to the front side of the vehicle than the arc-shaped wall 662 of the baffle 66. When viewed from the direction of the rotation axis X1, the opening 620 is formed to a size that allows at least a portion of the filter 10 to be inserted.

[0112] like Figure 4As shown, the partition wall 62 is located inside the peripheral wall 61 surrounding the second chamber S2 on the first cover 7 side of the housing 6. The opening 620 is located below the partition wall 62, and through holes 621 and 622 are formed above the opening 620.

[0113] The end surface of the peripheral wall portion 61 on the first cover 7 side is provided with a joint portion 612 with the first cover 7. The joint portion 612 is a flange-shaped portion surrounding the opening on the first cover 7 side of the partition wall portion 62 over the entire circumference. The inner side of the joint portion 612 forms the partition wall portion 62.

[0114] The joint portion 612 is joined to the joint portion 711 on the first cover 7 side over the entire circumference (see Figure 2 ). The housing 6 and the first cover 7 are connected by bolts (not shown) in a state where the joint portions 612 and 711 are joined to each other. Thus, the opening of the housing 6 is sealed by the first cover 7, forming a closed second chamber S2.

[0115] like Figure 4 As shown, the through hole 621 is located obliquely above the vehicle front side when viewed from the opening 620. The through hole 622 is located obliquely above the vehicle rear side when viewed from the through hole 621.

[0116] Inside the peripheral wall portion 61 , the primary pulley 31 and the secondary pulley 32 of the speed change mechanism 3 are located in an upper region in the direction of the vertical line VL.

[0117] The lower portion of the region of the peripheral wall portion 61 where the primary pulley 31 is provided is greatly bulged toward the lower portion of the case 6 , and the opening 620 is located at the lowermost portion of the bulged region.

[0118] When the power transmission device 1 is driven, the oil OL supplied through the oil passage (not shown) is ejected toward the belt 30 of the speed change mechanism 3 in the second chamber S2 to lubricate the belt 30 of the speed change mechanism 3 .

[0119] The oil OL that has lubricated the belt 30 moves toward the lower portion where the opening 620 is provided in the second chamber S2 due to its own weight, and returns to the lower portion of the first chamber S1 where the filter 10 is arranged through the opening 620 .

[0120] like Figure 5 and Figure 6 As shown, the filter 10 has a basic structure in which the filter 100 is arranged in a space S10 formed between an upper case 101 and a lower case 102 .

[0121] The lower case 102 is provided with an opening 103 that allows the internal space S10 of the filter 10 to communicate with the outside of the filter 10. A peripheral wall 104 that surrounds the opening 103 over the entire circumference is formed to protrude from the outer side surface of the lower case 102.

[0122] like Figure 7 As shown in FIG. 1 , the filter 10 is in a generally rectangular shape when viewed from above. A cylindrical first connecting portion 105 is provided on one side portion 101a of the upper housing 101. The first connecting portion 105 is disposed in a longitudinal direction ( Figure 7 The approximate center portion (in the up-down direction) is arranged in a direction perpendicular to one side portion 101a.

[0123] The first connection portion 105 extends linearly along the straight line L1 in a direction away from the one side portion 101a. The front end 105a of the first connection portion 105 reaches a position away from the one side portion 101a by a predetermined distance La. Here, the straight line L1 is a straight line passing through the approximate middle of the length direction (in the figure, the up-down direction) of the one side portion 101a and perpendicular to the one side portion 101a.

[0124] An annular groove 106 is provided on the front end 105 a side of the first connection portion 105 so as to surround the outer circumference of the first connection portion 105 over the entire circumference.

[0125] like Figure 6 As shown, the front end 105a side of the first connection part 105 is inserted into the connection port 120 of the mechanical oil pump MOP when the filter 10 is connected to the mechanical oil pump MOP. At this time, the seal ring SL embedded in the annular groove 106 seals the gap between the outer periphery of the first connection part 105 and the inner periphery of the connection port 120.

[0126] The interior of the first connection portion 105 serves as a discharge path 107 for the oil in the filter 10 , and an opening of the discharge path 107 serves as a first discharge port for the oil OL in the filter 10 .

[0127] like Figure 7 As shown, a second connection part 108 is provided on the side of the base 105b of the first connection part 105. The second connection part 108 is in the shape of a bottomed cylinder having a discharge passage 109 for the oil OL inside. The second connection part 108 is arranged so that the opening of the discharge passage 109 faces the direction of the straight line L2 orthogonal to the straight line L1. The opening of the discharge passage 109 is a second discharge port of the oil OL in the filter 10.

[0128] The second connection portion 108 bulges upward on the base portion 105b side of the first connection portion 105 so that the upper end of the second connection portion 108 is located above the first connection portion 105 (see Figure 8 ).

[0129] like Figure 7 As shown, the opening direction of the discharge path 109 in the second connection portion 108 is orthogonal to the opening direction of the discharge path 107 in the first connection portion 105 in a plan view.

[0130] like Figure 6As shown, the discharge path 107 in the first connection portion 105 is inclined at a predetermined angle θ1 with respect to the horizontal line HL intersecting the straight line L2 , and the first connection portion 105 is inclined in a direction located above the vertical line VL direction as it approaches the front end 105 a .

[0131] like Figure 6 As shown, the discharge path 109 in the second connection portion 108 and the discharge path 107 in the first connection portion 105 open into the internal space S10 of the filter 10 .

[0132] like Figure 7 As shown, the second connection portion 108 is located near a straight line L1 passing through the approximate center of the upper housing 101 .

[0133] In the upper housing 101, a region located on the extension of the discharge path 109 in the second connection portion 108 is provided on the lower housing 102 side ( Figure 7 A recessed portion 110 (notch portion) is formed on the inner side of the paper surface.

[0134] That is, when the filter 10 is viewed from the side, the discharge passage 109 of the second connection portion 108 is completely exposed. Figure 5 The illustrated cylindrical member 130 is inserted into the discharge path 109 from the side of the filter 10 without interfering with the upper case 101 .

[0135] Here, a small diameter portion 109a having an inner diameter smaller than that of the discharge path 109 is provided in the middle of the discharge path 109 (see Figure 7 ). The tubular member 130 inserted into the discharge passage 109 is inserted into the discharge passage 109 until it contacts the small diameter portion 109a.

[0136] like Figure 5 As shown, in this embodiment, the second connection portion 108 of the filter 10 and the connection portion 625 on the partition wall portion 62 side are connected via a tubular member 130 inserted into the discharge path 109 and the connection port 625a.

[0137] In this state, the discharge passage 109 of the filter 10 communicates with the oil passage 626 in the partition wall portion 62 via the tubular member 130 and the connection port 625 a of the connection portion 625 .

[0138] Therefore, after the tubular member 130 is inserted into the discharge passage 109 on the filter 10 side, the filter 10 is moved close to the partition wall portion 62 from the first chamber S1 side, and the tubular member 130 is inserted into the connection port 625 a of the connection portion 625 , so that the discharge passage 109 and the oil passage 626 communicate with each other via the connection portion 625 .

[0139] In addition, at this time, the cylindrical member 130 may be inserted into the connection port 625 a of the connection portion 625 first.

[0140] like Figure 6 As shown, the filter 10 is assembled to the mechanical oil pump MOP by inserting the front end 105a of the first connection portion 105 into the connection port 120 on the mechanical oil pump MOP side. The mechanical oil pump MOP is assembled to the partition wall portion 62, and the filter 10 is supported by the partition wall portion 62 via the mechanical oil pump MOP.

[0141] Fig. 9 62 is a diagram for explaining the support structure of the mechanical oil pump MOP in the partition wall portion 62. Fig. 9 Schematically represents the Figure 6 The AA line in the figure cuts through the cross section of the mechanical oil pump MOP.

[0142] like Fig. 9 As shown, a positioning projection 150 and a discharge port 140 for the oil OL are provided at a portion of the mechanical oil pump MOP that faces the partition wall portion 62 .

[0143] The partition wall portion 62 has an insertion hole 629 and a connection portion 627 formed on a surface thereof facing the mechanical oil pump MOP.

[0144] The mechanical oil pump MOP is positioned at a predetermined position on the partition wall portion 62 by inserting the protrusion 150 into the insertion hole 629 of the partition wall portion 62. In this state, the mechanical oil pump MOP is fixed to the partition wall portion 62 by bolts (not shown).

[0145] When the mechanical oil pump MOP is fixed to the partition wall portion 62, the discharge port 140 of the mechanical oil pump MOP is arranged at a position opposite to the connection portion 627 on the partition wall portion 62 side, and the discharge port 140 is communicated with the connection portion 627. The connection portion 627 is communicated with the oil passage 628 in the partition wall portion 62. Therefore, the oil OL discharged from the discharge port 140 of the mechanical oil pump MOP is supplied to the oil passage 628 through the connection portion 627.

[0146] Fig.10 The diagram is for explaining the process of mounting the filter 10 and the mechanical oil pump MOP to the partition wall portion 62 .

[0147] First, the first connection portion 105 of the filter 10 is inserted into the connection port 120 of the mechanical oil pump MOP from the straight line L1 direction, and the filter 10 is assembled to the mechanical oil pump MOP.

[0148] The insertion direction (displacement direction) of the filter 10 at this time is a direction along the mounting surface 640 of the partition wall portion 62 , and is a direction orthogonal to the mounting direction (the straight line L2 direction) of the mechanical oil pump MOP with respect to the partition wall portion 62 .

[0149] Next, the assembly of the mechanical oil pump MOP in which the filter 10 is assembled is displaced in the direction of the straight line L2 orthogonal to the straight line L1 , and the protrusion 150 of the mechanical oil pump MOP is inserted into the insertion hole 629 of the partition wall portion 62 for positioning.

[0150] At this time, the cylindrical member 130 is inserted into the connection port 625 a of the connection portion 625 , and simultaneously with the insertion of the protrusion 150 into the insertion hole 629 , the cylindrical member 130 is inserted into the second connection portion 108 of the filter 10 .

[0151] Thus, the filter 10 is supported at both the connection portion 625 and the mechanical oil pump MOP. If the filter 10 is supported only by the mechanical oil pump MOP, the filter 10 may rotate about the straight line L1 due to vibrations during travel of the vehicle V equipped with the power transmission device 1 .

[0152] The filter 10 is restricted from rotating about the straight line L1 by inserting the cylindrical member 130 of the second connecting portion 108 from the straight line L2 direction.

[0153] In this state, the filter 10 is arranged so that a part of the filter 10 reaches below the partition wall portion 62. In particular, Figure 5 As shown, a partial region of the filter 10 is arranged to reach the inside of the opening 620 .

[0154] In the case where the opening 620 is not provided, the filter 10 is arranged to avoid interference with the lower region Rx on the side of the peripheral wall portion 61, and the position of the filter 10 is in the direction away from the lower region Rx in the direction of the rotation axis X1 ( Figure 5 In this case, the housing HS (shell 6) may be enlarged in the direction of the rotation axis X1.

[0155] As described above, since the filter 10 can be arranged so that a part of the region reaches the inside of the opening 620 , it is possible to appropriately suppress an increase in size of the housing HS (casing 6 ) in the direction of the rotation axis X1 .

[0156] As described above, the vehicle power transmission device 1 according to the present embodiment has the following structure.

[0157] (1) The power transmission device 1 includes: a power transmission mechanism (torque converter T / C, forward / reverse switching mechanism 2, speed change mechanism 3, reduction mechanism 4, differential device 5) for transmitting the driving force of the engine ENG (driving source) to the driving wheels WH, WH; a housing HS for accommodating the power transmission mechanism; a partition wall portion 62 for supporting the rotating shaft of the power transmission mechanism and dividing the interior of the housing HS; a filter 10 arranged at the lower portion of the housing HS; and a mechanical oil pump MOP (pump) supported by the partition wall portion 62.

[0158] A first chamber S1 located on one side of the partition wall 62 in the rotation axis X direction of the power transmission device and a second chamber S2 located on the other side of the partition wall 62 in the rotation axis X direction of the power transmission device are provided in the housing HS.

[0159] The filter 10 has a first connection portion 105 (first connection port) connected to the mechanical oil pump MOP and a second connection portion 108 (second connection port) connected to the oil passage 626 (second oil passage) in the partition wall portion 62 .

[0160] The second connection portion 108 is connected to the oil passage 626 in the assembling direction of the mechanical oil pump MOP toward the partition wall portion 62 .

[0161] According to this structure, the filter 10 is supported at two locations: the mechanical oil pump MOP attached to the partition wall portion 62 and the partition wall portion 62 . Therefore, the support stability of the filter 10 can be ensured.

[0162] Furthermore, after the filter 10 is assembled to the mechanical oil pump MOP, the mechanical oil pump MOP is assembled to the partition wall portion 62 , thereby completing the connection between the second connection portion 108 of the filter 10 and the oil passage 626 on the partition wall portion 62 side.

[0163] Thus, the connection structure between the filter 10 and the oil passage 626 can be simplified. The oil passage 626 (in-casing oil passage) in the partition wall portion 62 of the casing 6 can be used to supply the oil OL sucked through the filter 10 to units located in front of the oil passage 626, such as the electric oil pump EOP and the control valve CV.

[0164] That is, by assembling the mechanical oil pump MOP (pump) in which the filter 10 is assembled to the partition wall portion 62 , the arrangement of the mechanical oil pump MOP and the filter 10 in the housing HS is completed.

[0165] That is, by assembling the filter 10 to the mechanical oil pump MOP to form a module, the filter 10 and the mechanical oil pump MOP can be easily arranged in the housing HS. In addition, the support structure of the filter 10 can be simplified.

[0166] Furthermore, it is not necessary to prepare a pipe for connecting the second connection portion 108 of the filter 10 and the unit in the housing HS. Therefore, the total number of components for connecting the second connection portion 108 of the filter 10 and the unit can be reduced. In addition, in the case of separately providing a pipe, in order to avoid interference with other components in the housing HS, it is necessary to bend the pipe and provide it. Since no pipe is required, the length of the oil path from the second connection portion 108 of the filter 10 to the unit can be shortened.

[0167] (i) An opening 620 (communication hole) for communicating the first chamber S1 and the second chamber S2 is provided at the lower portion of the partition wall 62 .

[0168] When viewed from the direction of the vertical line VL based on the installation state of the power transmission device 1 on the vehicle V, a part of the filter 10 is located in the opening 620 and is arranged to have a region overlapping with the partition wall 62 .

[0169] If the filter 10 is disposed so as to avoid the partition wall portion 62 , the width of the housing HS in the rotation axis direction of the power transmission mechanism may be increased.

[0170] If the filter 10 is arranged in the receiving portion 67 provided so as to overlap with the partition wall portion 62 when viewed from the vertical line VL direction, the filter 10 can be arranged so as to overlap with the partition wall portion 62 when viewed from the vertical line VL direction. Thus, a compact arrangement structure of the filter 10 capable of accommodating the filter in the housing HS is achieved. Therefore, the possibility of increasing the width of the housing HS in the direction of the rotation axis of the power transmission mechanism can be reduced.

[0171] (2) In the resin filter 10 , the recessed portion 110 for avoiding interference with the partition wall portion 62 is provided on the partition wall portion 62 side when viewed from the second connection portion 108 .

[0172] If configured in this way, when viewed from the assembly direction of the mechanical oil pump MOP relative to the partition wall portion 62, the area of ​​the second connection portion 108 in the filter 10 is arranged to overlap with the partition wall portion 62. In this state, since the filter 10 has the recessed portion 110 for avoiding interference with the partition wall portion 62, the main body of the filter 10 can be arranged across the lower side of the partition wall portion 62 in the direction of the rotation axis X1.

[0173] Thus, the area of ​​the filter 10 viewed from the vertical line VL direction can be ensured, and the filter 10 can be arranged close to the upper side in the vertical line direction, so that the capacity of the filter 10 can be ensured.

[0174] (3) The assembly direction of the first connection portion 105 of the filter 10 and the mechanical oil pump MOP (the straight line L1 direction) intersects with, and is more preferably orthogonal to, the assembly direction of the mechanical oil pump MOP with respect to the partition wall portion 62 (the straight line L2 direction).

[0175] If the connection portion connected to other components of the filter 10 is only the first connection portion 105, it is necessary to restrict the rotation of the filter 10 around the straight line L1, so the number of parts may increase.

[0176] By connecting the second connection portion 108 of the filter 10 to the partition wall portion 62, the connection portion connected to other components of the filter 10 can be two locations. As a result, the rotation of the filter 10 assembled in the mechanical oil pump MOP can be more reliably suppressed. Since there is no need to prepare a separate component for suppressing the rotation of the filter 10, the increase in cost caused by the increase in the number of parts can be suppressed.

[0177] (4) The first chamber S1 is provided with: a peripheral wall portion 641 which surrounds the outer periphery of the first rotating member (forward-reverse switching mechanism 2) constituting the power transmission mechanism; and a housing portion 67 which is arranged in a range such that the lower side of the peripheral wall portion 641 reaches the partition wall portion 62 along the rotation axis X in the direction of a vertical line based on the setting state of the power transmission device 1 to the vehicle V.

[0178] The filter 10 is disposed in the accommodation portion 67 .

[0179] When viewed in the direction of the rotation axis X of the power transmission device 1 , an opening 620 (communication hole) for communicating the first chamber S1 and the second chamber S2 is provided in a region of the partition wall portion 62 that overlaps with the accommodating portion 67 .

[0180] With such a configuration, the housing 67 functions as a through-hole that communicates the lower portion of the first chamber S1 with the lower portion of the second chamber S2 in the housing HS. As a result, the oil OL in the first chamber S1 and the oil OL in the second chamber S2 are recovered in the housing 67 located at the lower portion of the housing HS, thereby increasing the amount of oil OL sucked through the filter 10.

[0181] In addition, since the peripheral wall portion 641 is located between the housing portion 67 and the region 651 that houses the forward / reverse switching mechanism 2 (first rotating member), the degree of fluctuation of the oil level of the oil OL in the housing portion 67 can be suppressed by the rotation of the rotating member included in the forward / reverse switching mechanism 2. If the oil level of the oil OL in the housing portion 67 fluctuates greatly, air suction may occur in the filter 10, but since the possibility of causing air suction can be reduced, the oil OL can be stably sucked through the filter 10.

[0182] When the oil OL sucked through the filter 10 is used for operation or lubrication of the power transmission mechanism, the oil OL can be stably supplied to the hydraulic control circuit side, so that the power transmission mechanism can be appropriately operated and lubricated.

[0183] (5) The final gear 45 (second rotating element) provided below the forward / reverse travel switching mechanism 2 (first rotating element) on the vehicle rear side and the baffle 66 surrounding the outer periphery of the final gear 45 are provided in the first chamber S1.

[0184] When viewed from the rotation axis X direction of the power transmission device 1 , the filter 10 is located between the rotation axis X1 of the forward / reverse switching mechanism 2 and the rotation axis X4 of the final drive gear 45 .

[0185] In the power transmission device 1, there is a surplus space between the rotation axis X1 of the forward / reverse switching mechanism 2 and the rotation axis X4 of the final drive gear 45. If the filter 10 is arranged in this space, the filter 10 can be arranged close to the upper side in the vertical direction. Thus, the enlargement of the power transmission device 1 in the vertical direction VL can be appropriately suppressed.

[0186] (6) When viewed from the rotation axis X direction of the power transmission device 1 , the filter 10 is disposed at a position intersecting with the tangent line Lm.

[0187] The tangent line Lm connects the peripheral wall portion 641 along the lower outer periphery of the forward / reverse switching mechanism 2 (first rotating element) and the arcuate wall portion 662 of the baffle plate 66 along the lower outer periphery of the final gear 45 (second rotating element).

[0188] In the power transmission device 1, the area between the peripheral wall portion 641 and the arc-shaped wall portion 662 tends to become an unused dead space, but the dead space can be effectively utilized to provide the opening portion 620 and the filter 10. In particular, by arranging the filter 10 close to the area between the peripheral wall portion 641 and the arc-shaped wall portion 662, it is possible to appropriately suppress the case 6 from being enlarged in the vertical direction in order to provide the filter 10.

[0189] (ii) In the housing HS, the accommodating portion 67 is located on the lower side in the direction of the vertical line VL based on the setting state of the power transmission device 1 to the vehicle V, when viewed from the rotation axis X1 of the forward-reverse switching mechanism 2 (first rotating component) and the rotation axis X4 of the final drive gear 45 (second rotating component).

[0190] A baffle plate 66 is provided on the first chamber S1 side so as to surround the outer periphery of the final gear 45 (second rotating member).

[0191] The opening 620 is located at a position intersecting a tangent line Lm connecting the outer periphery of the arcuate peripheral wall 641 surrounding the forward / reverse travel switching mechanism 2 and the outer periphery of the arcuate wall 662 of the baffle 66 surrounding the outer periphery of the final drive gear 45 .

[0192] The opening 620 is formed in a range where the tangent line Lm passes from the region between the peripheral wall portion 641 and the arc-shaped wall portion 662 from the upper side to the lower side and reaches the lower portion of the housing 6 .

[0193] The filter 10 is arranged so as to have a range overlapping with the opening 620 when viewed from the direction of the rotation axes X1 and X4.

[0194] In the power transmission device 1, the area between the peripheral wall portion 641 and the arc-shaped wall portion 662 tends to become an unused dead space, but the dead space can be effectively utilized to provide the opening portion 620 and the filter 10. In particular, by arranging the filter 10 close to the area between the peripheral wall portion 641 and the arc-shaped wall portion 662, it is possible to appropriately suppress the case 6 from being enlarged in the vertical direction in order to provide the filter 10.

[0195] (iii) The mechanical oil pump MOP is located to the side of the filter 10 on the vehicle front side.

[0196] The forward / reverse switching mechanism 2 (first rotating element) is located above the final gear 45 (second rotating element) on the vehicle front side. Therefore, there is more space on the vehicle front side of the filter 10 than on the vehicle rear side in the vertical line VL direction.

[0197] By arranging the mechanical oil pump MOP laterally on the vehicle front side of the filter 10 , it is possible to appropriately suppress an increase in size of the case 6 of the power transmission device 1 in the vertical direction.

[0198] (iv) The power transmission device 1 has a power transmission mechanism for transmitting the driving force from the engine ENG (driving source) to the driving wheels WH, WH, a housing HS for accommodating the power transmission mechanism, a control valve CV for controlling the pressure of the oil OL supplied to the power transmission mechanism, and a pump (electric oil pump EOP, mechanical oil pump MOP) for supplying the oil OL to the control valve CV.

[0199] The housing HS has: a partition wall portion 62 that supports the rotating axis of the power transmission mechanism; a first chamber S1 that is located on one side of the partition wall portion 62 in the direction of the rotating axis X of the power transmission mechanism; a second chamber S2 that is located on the other side of the partition wall portion 62 in the direction of the rotating axis X of the power transmission mechanism; and a storage chamber S3 that is located on the vehicle front side of the first chamber S1 and the second chamber S2.

[0200] The control valve CV and the electric oil pump EOP are arranged vertically in the accommodation chamber S3. The control valve CV and the electric oil pump EOP are arranged in the direction of the rotation axis X of the power transmission mechanism in the accommodation chamber S3.

[0201] When viewed from the rotation axis X direction of the power transmission mechanism, the filter 10 supported by the mechanical oil pump MOP is located in the first chamber S1 between the input shaft (rotation axis X1 ) and the output shaft (rotation axis X4 ) of the power transmission mechanism.

[0202] The filter 10 has a first connection portion 105 (first connection port) connected to the mechanical oil pump MOP and a second connection portion 108 (second connection port) connected to the oil passage 626 (second oil passage) in the partition wall portion 62 .

[0203] The second connection portion 108 is connected to the oil passage 626 in the assembling direction of the mechanical oil pump MOP toward the partition wall portion 62 .

[0204] In addition, for example, when the control valve CV is a power transmission device disposed in a lower portion of the housing HS in a direction along a horizontal line, the filter 10 is attached to the control valve CV.

[0205] In the case of the power transmission device 1 in which the control valve CV is disposed vertically on the vehicle front side of the housing HS, the control valve CV is disposed in the accommodating chamber S3 different from the first chamber S1 in which the filter 10 is disposed.

[0206] Therefore, the filter 10 cannot be supported by the control valve CV.

[0207] According to the above-described configuration, the filter 10 is supported at two locations, namely, the mechanical oil pump MOP attached to the partition wall portion 62 and the partition wall portion 62 . Therefore, the support stability of the filter 10 can be ensured.

[0208] In the above-mentioned embodiment, the case where the power transmission device 1 transmits the rotation of the engine ENG to the drive wheels WH, WH is exemplified, but the power transmission device 1 may also transmit the rotation of at least one of the engine ENG and the motor (rotating motor) to the drive wheels WH, WH. For example, a single-motor, dual-clutch type power transmission device (a motor is arranged between the engine ENG and the power transmission device, a first clutch is arranged between the engine ENG and the motor, and a second clutch is arranged in the power transmission device 1) may also be used.

[0209] In addition, in the above-mentioned embodiment, the case where the power transmission device 1 has a speed change function is illustrated, but the power transmission mechanism may not have a speed change function and only perform deceleration (or speed increase). In the case where the power transmission device does not have a speed change function and the power transmission device is configured to decelerate the rotation of the motor and transmit it to the drive wheels WH, WH, the hydraulic control circuit for supplying the oil OL for cooling the motor and the oil OL for lubrication of the speed reduction mechanism is arranged in the storage chamber S3 together with the electric oil pump EOP. In addition, in the above-mentioned embodiment, the case where the control unit of the power transmission device 1 has a control valve CV is illustrated, but in the case where the power transmission device 1 also does not have a speed change mechanism, and in addition, when the driving source is not the engine ENG but a motor (rotating motor), it may also be a control unit having an inverter or the like for driving and controlling the motor.

[0210] Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above and can be modified appropriately within the scope of the technical concept of the invention.

[0211] Description of Reference Numerals

[0212] 1: Power transmission device (power transmission mechanism)

[0213] 2: Forward / reverse switching mechanism (power transmission mechanism: first rotating member)

[0214] 3: Speed ​​change mechanism (power transmission mechanism)

[0215] 4: Speed ​​reduction mechanism (power transmission mechanism)

[0216] 45: Final drive gear (second rotating member)

[0217] 5: Differential device (power transmission mechanism)

[0218] 6: Shell

[0219] 61: Wall

[0220] 62: Partition wall

[0221] 66: Baffle

[0222] 662: Arc-shaped wall

[0223] 67: Accommodation

[0224] 7: First cover

[0225] 8: Second cover

[0226] 9: The third cover

[0227] 10: Filter

[0228] 105: First connection portion (first connection port)

[0229] 107: Exhaust route

[0230] 108: Second connection portion (second connection port)

[0231] 109: Exhaust route

[0232] 110: concave part

[0233] 120: Connection port

[0234] 620: Opening (communication hole)

[0235] 626: Oil circuit (second oil circuit)

[0236] 628: Oil circuit (first oil circuit)

[0237] 641: Wall

[0238] HS: Shell

[0239] MOP: Mechanical Oil Pump (Pump)

[0240] OL: Oil

[0241] S1: First Room

[0242] S2: Second Chamber

[0243] X1~X4:rotation axis

Claims

1. A power transmission device for a vehicle, comprising: a housing that accommodates a power transmission mechanism; a partition wall that supports the power transmission mechanism and divides the inside of the housing; a filter that is arranged at the lower part of the housing; and a pump that is supported by the partition wall, characterized in that: The housing is provided with: a first chamber located on one side of the partition wall portion in the direction of the rotation axis of the power transmission device; and a second chamber located on the other side of the partition wall portion in the direction of the rotation axis of the power transmission device. The filter has a first connection port connected to the pump and a second connection port connected to a second oil passage in the partition wall. The second connection port is connected to the second oil passage in an assembling direction from the pump to the partition wall portion.

2. The power transmission device according to claim 1, characterized in that: The filter is provided with a recessed portion on the partition wall side when viewed from the second connection port so as to avoid interference with the partition wall.

3. The power transmission device according to claim 1 or 2, characterized in that: The assembly direction of the first connection port and the pump is a direction intersecting with the assembly direction of the pump to the partition wall portion.

4. The power transmission device according to any one of claims 1 to 3, characterized in that: A peripheral wall portion and a housing portion are provided in the first chamber, the peripheral wall portion surrounds the outer periphery of the first rotating member constituting the power transmission mechanism, and the housing portion is provided at a lower side of the peripheral wall portion and extends along the rotating shaft to the partition wall portion. The filter is disposed in the housing. A communicating hole is provided in a region of the partition wall portion that overlaps with the accommodation portion when viewed from the rotation axis direction of the power transmission device.

5. The power transmission device according to claim 4, characterized in that: The first chamber includes a second rotating member provided below the first rotating member on the rear side of the vehicle and a cover surrounding the outer periphery of the second rotating member. The filter is located between the rotation axis of the first rotation element and the rotation axis of the second rotation element when viewed from the rotation axis direction of the power transmission device.

6. The power transmission device according to claim 5, characterized in that: The filter is disposed at a position intersecting with a tangent line connecting an outer periphery of a lower side of the first rotation member and an outer periphery of a lower side of the second rotation member when viewed from the rotation axis direction of the power transmission device.

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