Vehicle drive device

Abstract

To provide a vehicle drive device that is easy to ensure respective arrangement spaces for a strainer and a hydraulic control device even when the size of a case is limited.SOLUTION: A strainer 1 for filtering oil sucked into an oil pump has a first connection port 1a that is a connection port for transferring oil to and from a hydraulic control device 2. The hydraulic control device 2 has a second connection port 2a connected to the first connection port 1a. A case 9 has a first case part 91 and a second case part 92 joined to the first case part 91. The strainer 1 is fixed to the first case part 91 in a posture in which the first connection port 1a faces toward a second side J2 in the joining direction, and the hydraulic control device 2 is fixed to the second case part 92 in a posture in which the second connection port 2a faces toward a first side J1 in the joining direction. In the state that the first case part 91 and the second case part 92 are joined, the first connection port 1a and the second connection port 2a are connected via a sealing member 10.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle drive device including an input member drivingly connected to a drive force source, an output member drivingly connected to wheels, a power transmission mechanism that transmits power between them, an oil pump driven by the drive force transmitted through the power transmission mechanism, a strainer that filters oil sucked into the oil pump, and a hydraulic control device including a control valve that controls the oil discharged from the oil pump. [Background technology]

[0002] An example of such a vehicle drive device is disclosed in the following Patent Document 1. In the following description of the background art, reference symbols in Patent Document 1 will be cited in parentheses.

[0003] In the vehicle drive device (1) of Patent Document 1, the strainer (87a) and the hydraulic control device (86) are connected to each other so that oil sucked through the strainer (87a) flows to the hydraulic control device (86). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-187535 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the vehicle drive device (1) of Patent Document 1, the hydraulic control device (86) is fixed to the case (40), and the strainer (87a) is fixed to the hydraulic control device (86) (see paragraph 0051 of Patent Document 1). In such a configuration, a large continuous space is required in the case (40) in which both the strainer (87a) and the hydraulic control device (86) can be disposed. This leads to an increase in the size of the case (40), and therefore to an increase in the size of the vehicle drive device (1).

[0006] Therefore, it is desirable to realize a vehicle drive device that makes it easy to ensure the space required for disposing the strainer and the hydraulic control device even when the size of the case is limited. [Means for solving the problem]

[0007] In view of the above, the characteristic configuration of the vehicle drive device is as follows: an input member drivingly connected to a drive force source; An output member drivingly connected to the wheels; a power transmission mechanism for transmitting power between the input member and the output member; an oil pump driven by a driving force transmitted through the power transmission mechanism; a strainer for filtering the oil drawn by the oil pump; a hydraulic control device including a control valve for controlling the oil discharged from the oil pump; a case including the power transmission mechanism, the oil pump, the strainer, the hydraulic control device, and a storage chamber that stores oil, The strainer includes a first connection port which is a connection port for transferring oil to and from the hydraulic control device, The hydraulic control device includes a second connection port connected to the first connection port, the case includes a first case portion and a second case portion joined to the first case portion to form the accommodation chamber together with the first case portion, A direction in which the first case portion and the second case portion are joined to each other is defined as a joining direction, a side in the joining direction on which the first case portion is disposed relative to the second case portion is defined as a joining direction first side, and a side opposite to the joining direction first side is defined as a joining direction second side, The strainer is fixed to the first case portion with the first connection port facing the second joining direction, The hydraulic control device is fixed to the second case portion with the second connection port facing the first joining direction, The first connection port and the second connection port are connected via a seal member when the first case portion and the second case portion are joined together.

[0008] According to this characteristic configuration, the case includes a first case portion and a second case portion joined to the first case portion. The strainer and the hydraulic control device are separately fixed to the first case portion and the second case portion, respectively. This makes it easy to ensure sufficient space for arranging the strainer and the hydraulic control device even when the size of the case is limited. According to this characteristic configuration, by joining a first case part to which the strainer is fixed with the first connection port facing the second joining direction and a second case part to which the hydraulic control device is fixed with the second connection port facing the first joining direction, the first connection port and the second connection port can be connected via a seal member. This makes it easy to simplify the process of connecting the first connection port and the second connection port and joining the first case part and the second case part. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view taken along an axial direction of a vehicle drive device according to an embodiment; [Diagram 2] 1 is a skeleton diagram of a vehicle drive device according to an embodiment taken along an axial direction; [Diagram 3] FIG. 2 is a diagram showing the positional relationship of components of a vehicle drive device according to an embodiment; [Figure 4] FIG. 1 is a cross-sectional view showing a state in which a first connection port of the strainer and a second connection port of the hydraulic control device are connected to each other. [Diagram 5] FIG. 11 is a perspective view showing the positional relationship between the strainer and the second oil pump. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a vehicle drive device 100 according to an embodiment will be described with reference to the drawings. As shown in Fig. 1 and Fig. 2, the vehicle drive device 100 includes an input member I, an output member O, a power transmission mechanism TS, an oil pump OP, and a case 9.

[0011] The input member I is drivingly connected to a driving force source S. In this embodiment, the driving force source S is an internal combustion engine EG serving as a prime mover (a gasoline engine, a diesel engine, or the like) that is driven by the combustion of fuel to extract power.

[0012] Here, in this application, "driving connection" refers to a state in which two rotating elements are connected so as to be able to transmit a driving force, and includes a state in which the two rotating elements are connected so as to rotate integrally, or a state in which the two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members. Such transmission members include various members that transmit rotation at the same speed or at a variable speed, such as shafts, gear mechanisms, belts, chains, etc. Note that the transmission members may also include engagement devices that selectively transmit rotation and driving force, such as friction engagement devices and meshing engagement devices.

[0013] The output member O is drivingly connected to wheels W (see FIG. 2). The power transmission mechanism TS is configured to transmit power between the input member I and the output member O. The oil pump OP is configured to be driven by the driving force transmitted through the power transmission mechanism TS.

[0014] In this embodiment, the vehicle drive device 100 further includes a first rotating electric machine MG1, a second rotating electric machine MG2, an engagement device CL, and a differential gear mechanism DF.

[0015] Each of the first rotating electric machine MG1 and the second rotating electric machine MG2 has a function as a motor (electric motor) that receives a supply of electric power to generate power, and a function as a generator (electric power generator) that receives a supply of power to generate electric power.

[0016] The engagement device CL is a friction clutch that connects and disconnects the power transmission in the power transmission mechanism TS. The differential gear mechanism DF is configured to distribute the driving force transmitted to the output member O to a pair of wheels W.

[0017] In this embodiment, the oil pump OP includes a first oil pump OP1 driven by a driving force transmitted through a portion of the power transmission mechanism TS closer to the input member I than the engagement device CL, and a second oil pump OP2 driven by a driving force transmitted through a portion of the power transmission mechanism TS closer to the output member O than the engagement device CL.

[0018] In this embodiment, there are a first axis X1 to a sixth axis X6 as rotation axes of a plurality of rotating members included in the vehicle drive device 100. The first axis X1 to the sixth axis X6 are arranged parallel to one another.

[0019] In the following description, the direction along each of the first axis X1 to the sixth axis X6 is referred to as the "axial direction L." One side of the axial direction L is referred to as the "first axial side L1," and the other side of the axial direction L is referred to as the "second axial side L2." Additionally, the direction perpendicular to each of the first axis X1 to the sixth axis X6 is referred to as the "radial direction R" based on the corresponding axis. Note that when it is not necessary to distinguish which axis is used as the reference or when it is clear which axis is used as the reference, it may be simply referred to as the "radial direction R."

[0020] 1 and 3, the case 9 includes a first housing chamber CM1. The first housing chamber CM1 houses a power transmission mechanism TS and an oil pump OP. In this embodiment, the first housing chamber CM1 further houses an input member I, an output member O, an engagement device CL (see FIG. 1), and a differential gear mechanism DF (see FIG. 1).

[0021] 1, in this embodiment, the case 9 further includes a second housing chamber CM2. The second housing chamber CM2 houses the first rotating electric machine MG1 and the second rotating electric machine MG2. The second housing chamber CM2 is disposed on a first axial side L1 with respect to the first housing chamber CM1.

[0022] The case 9 includes a first case part 91 and a second case part 92. The second case part 92 is joined to the first case part 91 to form a first housing chamber CM1 together with the first case part 91. In this embodiment, the second case part 92 is joined to the first case part 91 from a second axial side L2. The first housing chamber CM1 is formed between the first case part 91 and the second case part 92 in the axial direction L.

[0023] In this embodiment, the case 9 further includes a third case portion 93. The third case portion 93 is joined to the first case portion 91 to form a second storage chamber CM2 together with the first case portion 91. In this embodiment, the third case portion 93 is joined to the first case portion 91 from a first axial side L1. The second storage chamber CM2 is formed between the first case portion 91 and the third case portion 93 in the axial direction L.

[0024] The first case portion 91 includes a partition wall portion 911 and a first side wall portion 912. The partition wall portion 911 and the first side wall portion 912 are each formed to extend along the radial direction R. The partition wall portion 911 is disposed so as to cover the power transmission mechanism TS from the first axial side L1 and to cover the first rotating electric machine MG1 and the second rotating electric machine MG2 from the second axial side L2. In this manner, the partition wall portion 911 is formed so as to separate the first housing chamber CM1 and the second housing chamber CM2 in the axial direction L. The first side wall portion 912 is disposed so as to cover the differential gear mechanism DF from the first axial side L1.

[0025] The second case portion 92 includes a second side wall portion 921 and a third side wall portion 922. Each of the second side wall portion 921 and the third side wall portion 922 is formed to extend along the radial direction R. The second side wall portion 921 is disposed so as to cover the power transmission mechanism TS from the second axial side L2. The third side wall portion 922 is disposed so as to cover the differential gear mechanism DF from the second axial side L2.

[0026] The third case portion 93 includes a fourth side wall portion 931. The fourth side wall portion 931 is formed so as to extend along the radial direction R. The fourth side wall portion 931 is disposed so as to cover the first rotating electric machine MG1 and the second rotating electric machine MG2 from the first axial side L1.

[0027] 1, the input member I is disposed on the first axis X1. In this embodiment, the input member I is a shaft member extending along the axial direction L. The input member I is disposed so as to penetrate the second side wall portion 921 in the axial direction L. The input member I is rotatably supported from the outside in the radial direction R by the second side wall portion 921 via an input bearing B11.

[0028] The first rotating electric machine MG1 is disposed on the second axis X2. The first rotating electric machine MG1 includes a first stator ST1 and a first rotor RT1.

[0029] The first stator ST1 includes a cylindrical first stator core SC1. The first stator core SC1 is fixed to a case 9 (here, a first case portion 91).

[0030] The first rotor RT1 includes a cylindrical first rotor core RC1. The first rotor core RC1 is rotatably supported by the first stator core SC1. In this embodiment, the first rotor core RC1 is connected to the first rotor shaft RS1 so as to rotate integrally with the first rotor core RC1.

[0031] The first rotor shaft RS1 is a shaft member extending along the axial direction L. In this embodiment, the first rotor shaft RS1 is formed in a cylindrical shape extending along the axial direction L. In this embodiment, the first rotor shaft RS1 is disposed so as to penetrate the partition wall portion 911 in the axial direction L. The first rotor shaft RS1 is rotatably supported from the outside in the radial direction R by the partition wall portion 911 via the first rotor bearing B21. The first rotor shaft RS1 is rotatably supported from the outside in the radial direction R by the fourth side wall portion 931 via the second rotor bearing B22.

[0032] In this embodiment, the first rotating electric machine MG1 is an inner rotor type rotating electric machine. Therefore, the first rotor core RC1 is disposed on the inside in the radial direction R with respect to the first stator core SC1. Also, the first rotor shaft RS1 is disposed on the inside in the radial direction R with respect to the first rotor core RC1.

[0033] In this embodiment, the first rotating electric machine MG1 is a rotating field type rotating electric machine. Therefore, a stator coil is wound around the first stator core SC1. In this embodiment, the stator coil is wound around the first stator core SC1 so that a first coil end portion CE1 protruding on both sides in the axial direction L is formed with respect to the first stator core SC1. In addition, a permanent magnet is provided in the first rotor core RC1.

[0034] The second rotating electric machine MG2 is disposed on the third axis X3. The second rotating electric machine MG2 includes a second stator ST2 and a second rotor RT2.

[0035] The second stator ST2 includes a cylindrical second stator core SC2. The second stator core SC2 is fixed to the case 9 (here, the first case portion 91).

[0036] The second rotor RT2 includes a cylindrical second rotor core RC2. The second rotor core RC2 is rotatably supported by the second stator core SC2. In this embodiment, the second rotor core RC2 is connected to the second rotor shaft RS2 so as to rotate integrally with the second rotor core RC2.

[0037] The second rotor shaft RS2 is a shaft member extending along the axial direction L. In this embodiment, the second rotor shaft RS2 is disposed so as to penetrate the partition wall portion 911 in the axial direction L. The second rotor shaft RS2 also includes a first shaft member RS21 connected to the second rotor core RC2 so as to rotate integrally therewith, and a second shaft member RS22 connected to the first shaft member RS21 so as to rotate integrally therewith. In this embodiment, the first shaft member RS21 is rotatably supported from the outside in the radial direction R by the partition wall portion 911 via the third rotor bearing B31. Furthermore, the first shaft member RS21 is rotatably supported from the outside in the radial direction R by the fourth side wall portion 931 via the fourth rotor bearing B32. The second shaft member RS22 is rotatably supported from the outside in the radial direction R by the partition wall portion 911 via the fifth rotor bearing B33. Furthermore, the second shaft member RS22 is rotatably supported from the outside in the radial direction R by the second side wall portion 921 via a sixth rotor bearing B34.

[0038] In this embodiment, the second rotating electric machine MG2 is an inner rotor type rotating electric machine. Therefore, the second rotor core RC2 is disposed on the inside in the radial direction R with respect to the second stator core SC2. Also, the second rotor shaft RS2 is disposed on the inside in the radial direction R with respect to the second rotor core RC2.

[0039] In this embodiment, the second rotating electric machine MG2 is a rotating field type rotating electric machine. Therefore, a stator coil is wound around the second stator core SC2. In this embodiment, the stator coil is wound around the second stator core SC2 so that second coil end portions CE2 protruding on both sides in the axial direction L are formed with respect to the second stator core SC2. In addition, a permanent magnet is provided in the second rotor core RC2.

[0040] The differential gear mechanism DF is disposed on the fourth axis X4. The differential gear mechanism DF includes a differential case DC, a pair of pinion gears PG, and a pair of side gears SG.

[0041] The differential case DC houses a pair of pinion gears PG and a pair of side gears SG. The differential case DC is configured to rotate about a fourth axis X4. In this embodiment, the differential case DC is rotatably supported from the outside in the radial direction R by the first side wall portion 912 via a first differential bearing B41. The differential case DC is rotatably supported from the outside in the radial direction R by the third side wall portion 922 via a second differential bearing B42.

[0042] The pair of pinion gears PG are disposed to face each other with a gap in the radial direction R based on the fourth axis X4. The pair of pinion gears PG are rotatably supported by a pinion shaft PS fixed to the differential case DC. More specifically, each of the pair of pinion gears PG is configured to be rotatable (spin) about its own axis and rotatable (revolve) about the fourth axis X4.

[0043] The pair of side gears SG are arranged on either side of the pinion shaft PS in the axial direction L. The pair of side gears SG mesh with the pair of pinion gears PG. The pair of side gears SG are configured to rotate about a fourth axis X4. Each of the pair of side gears SG is connected to a drive shaft DS drivingly connected to wheels W so as to rotate integrally with the drive shaft DS.

[0044] In this embodiment, the vehicle driving device 100 further includes a first input gear Gi1, a second input gear Gi2, a first counter gear Gc1, a second counter gear Gc2, a first rotor gear Gr1, a second rotor gear Gr2, and an output gear Gd.

[0045] The first input gear Gi1 is connected to the input member I so as to rotate integrally with the input member I. The first input gear Gi1 is connected to the second input gear Gi2 via the engagement device CL. The first input gear Gi1, the second input gear Gi2, and the engagement device CL are arranged on the first axis X1. In this embodiment, the first input gear Gi1, the engagement device CL, and the second input gear Gi2 are arranged in the order described from the first axial side L1 toward the second axial side L2.

[0046] In this embodiment, the first input gear Gi1 is rotatably supported by the partition wall portion 911 from the inside in the radial direction R via a first input gear bearing B51. The second input gear Gi2 is disposed on the outside in the radial direction R with respect to the input member I. The second input gear Gi2 and the input member I are supported by the second input gear bearing B52 so as to be rotatable relative to each other.

[0047] The first counter gear Gc1 meshes with the second input gear Gi2. The second counter gear Gc2 meshes with the output gear Gd. The first counter gear Gc1 and the second counter gear Gc2 are arranged on the fifth axis X5. In this embodiment, the second counter gear Gc2 is formed to have a smaller diameter than the first counter gear Gc1. The second counter gear Gc2 is also arranged on the first axial side L1 of the first counter gear Gc1.

[0048] The first counter gear Gc1 and the second counter gear Gc2 are connected to each other via a counter shaft CS so as to rotate integrally with each other. The counter shaft CS is a shaft member extending along the axial direction L. In this embodiment, the counter shaft CS is rotatably supported from the outside in the radial direction R by the partition wall portion 911 via a first counter bearing B71. Furthermore, the counter shaft CS is rotatably supported from the outside in the radial direction R by the second side wall portion 921 via a second counter bearing B72.

[0049] The first rotor gear Gr1 meshes with the first input gear Gi1. The first rotor gear Gr1 is connected to the first rotor shaft RS1 so as to rotate integrally with the first rotor shaft RS1. The first rotor gear Gr1 and the first rotor shaft RS1 are disposed on the second axis X2. In this embodiment, the first rotor gear Gr1 is rotatably supported from the inside in the radial direction R by the partition wall portion 911 via the first rotor gear bearing B61. Furthermore, the first rotor gear Gr1 is rotatably supported from the outside in the radial direction R by the second side wall portion 921 via the second rotor gear bearing B62.

[0050] The second rotor gear Gr2 meshes with the first counter gear Gc1. The second rotor gear Gr2 is connected to the second rotor shaft RS2 so as to rotate integrally with the second rotor shaft RS2. The second rotor gear Gr2 and the second rotor shaft RS2 are disposed on the third axis X3. In this embodiment, the second rotor gear Gr2 is connected to the second shaft member RS22 of the second rotor shaft RS2 so as to rotate integrally with the second rotor shaft RS2.

[0051] The output gear Gd is disposed so as to overlap with the first case portion 91 when viewed in the radial direction R. In this embodiment, the output gear Gd functions as an output member O. The output gear Gd is also connected to the differential case DC so as to rotate integrally with the differential case DC. Here, with regard to the arrangement of two elements, "overlapping when viewed in a specific direction" refers to the existence of at least a portion of an area where a virtual line parallel to the line of sight intersects with both of the two elements when the virtual line is moved in each direction perpendicular to the line of sight.

[0052] In this embodiment, the first input gear Gi1, the second input gear Gi2, the first counter gear Gc1, and the second counter gear Gc2 function as a power transmission mechanism TS.

[0053] As shown in Figures 1 and 2, the first oil pump OP1 includes a first pump rotor PR1. The first pump rotor PR1 is connected to a first rotor shaft RS1 via a connecting shaft PS1 so as to rotate integrally with the first rotor shaft RS1. The connecting shaft PS1 is a shaft member extending along the axial direction L. The first pump rotor PR1 and the connecting shaft PS1 are disposed on the second axis X2.

[0054] As shown in Fig. 2, the second oil pump OP2 includes a second pump rotor PR2. The second pump rotor PR2 is connected to a pump drive gear Gp so as to rotate integrally with the pump drive gear Gp. The pump drive gear Gp is ​​meshed with an output gear Gd. The second oil pump OP2 is configured to be driven by the rotation of the output gear Gd. The second pump rotor PR2 and the pump drive gear Gp are disposed on a sixth axis X6.

[0055] 3, the second oil pump OP2 is fixed to the first case portion 91 so as to be accommodated in the first accommodation chamber CM1. In this embodiment, the second oil pump OP2 is fixed to the partition wall portion 911 of the first case portion 91 from the second axial side L2 by a third fastening member F3 such as a bolt.

[0056] In the following description, when the vehicle equipped with the vehicle driving device 100 is located on a horizontal plane, the direction along the vertical direction is referred to as the "up-down direction V". The upper side in the vertical direction is referred to as the "upper side V1", and the lower side in the vertical direction is referred to as the "lower side V2". When the vehicle equipped with the vehicle driving device 100 is located on a horizontal plane, the direction along the horizontal direction and perpendicular to the axial direction L is referred to as the "front-rear direction D". One side of the front-rear direction D is referred to as the "front side D1", and the other side of the front-rear direction D is referred to as the "rear side D2". Each of the up-down direction V and the front-rear direction D coincides with a specific direction in the radial direction R.

[0057] In this embodiment, the first axis X1, the second axis X2, and the sixth axis X6 are disposed on the rear side D2 with respect to the third axis X3, the fifth axis X5, and the fourth axis X4. The first axis X1 is disposed on the upper side V1 with respect to the second axis X2, and the sixth axis X6 is disposed on the lower side V2 with respect to the second axis X2. The third axis X3 is disposed on the upper side V1 with respect to the fifth axis X5, and the fourth axis X4 is disposed on the lower side V2 with respect to the fifth axis X5.

[0058] As shown in Fig. 4, the vehicle drive device 100 includes a first strainer 1 and a hydraulic control device 2. The first strainer 1 is configured to filter oil sucked into an oil pump OP (here, a first oil pump OP1). The hydraulic control device 2 is a device including a control valve (not shown) that controls the oil discharged from the oil pump OP (here, the first oil pump OP1). The first strainer 1 and the hydraulic control device 2 are accommodated in a first accommodation chamber CM1.

[0059] In this embodiment, the vehicle drive device 100 further includes a second strainer 4 (see FIG. 3). The second strainer 4 is configured to filter the oil sucked into the second oil pump OP2. The second strainer 4 is accommodated in the first accommodation chamber CM1. In a variation of this configuration, the vehicle drive device 100 may not include the second strainer 4, and the first strainer 1 may be configured to filter the oil sucked into the second oil pump OP2. In this embodiment, the first strainer 1 corresponds to the "strainer."

[0060] In the following description, the direction in which the first case part 91 and the second case part 92 are joined to each other is referred to as the "joining direction J." The side on which the first case part 91 is disposed relative to the second case part 92 in the joining direction J is referred to as the "joining direction first side J1," and the side opposite to the joining direction first side J1 is referred to as the "joining direction second side J2." In this embodiment, the axial direction L corresponds to the joining direction J. The axial direction first side L1 corresponds to the joining direction first side J1, and the axial direction second side L2 corresponds to the joining direction second side J2.

[0061] The first strainer 1 has a first connection port 1a which is a connection port for transferring oil to and from the hydraulic control device 2. The first strainer 1 is fixed to the first case portion 91 with the first connection port 1a facing the second joining direction side J2. In this embodiment, the first strainer 1 is fixed to the partition wall portion 911 of the first case portion 91 from the second joining direction side J2 by ​​a first fastening member F1 such as a bolt.

[0062] The hydraulic control device 2 includes a second connection port 2a connected to the first connection port 1a. The hydraulic control device 2 is fixed to the second case portion 92 with the second connection port 2a facing the first side J1 in the joining direction. In this embodiment, the hydraulic control device 2 includes a valve body 21 provided with an oil passage communicating with the above-mentioned control valve. The valve body 21 is fixed to the third side wall portion 922 of the second case portion 92 from the first side J1 in the joining direction by a second fastening member F2 such as a bolt.

[0063] The first connection port 1a of the first strainer 1 and the second connection port 2a of the hydraulic control device 2 are connected to each other via a seal member 10 in a state in which the first case portion 91 and the second case portion 92 are joined. The seal member 10 is a member that seals the opposing surfaces of the first connection port 1a and the second connection port 2a in an oil-tight manner. The seal member 10 is made of, for example, rubber, elastomer, resin, etc. In this embodiment, the seal member 10 is attached to a groove portion formed in a portion of the first strainer 1 that constitutes the first connection port 1a.

[0064] When the first oil pump OP1 is driven, the oil stored in the case 9 flows through the first strainer 1, the connection between the first connection port 1a and the second connection port 2a, the oil passage in the valve body 21, the suction port of the first oil pump OP1, and the discharge port of the first oil pump OP1 in the order described above, and is supplied to the hydraulic control device 2. Then, the hydraulic pressure after control by the control valve of the hydraulic control device 2 is supplied to the working hydraulic chamber (hydraulic chamber for driving the piston) of the engagement device CL. In this embodiment, the oil discharged by the first oil pump OP1 is also used for cooling the first rotating electric machine MG1 and the second rotating electric machine MG2 and lubricating each part.

[0065] As described above, the vehicle drive device 100 has the following features: An input member I drivingly connected to a driving force source S; An output member O drivingly connected to a wheel W; a power transmission mechanism TS for transmitting power between an input member I and an output member O; an oil pump OP driven by a driving force transmitted through a power transmission mechanism TS; a first strainer 1 for filtering oil drawn into an oil pump OP; A hydraulic control device 2 including a control valve for controlling oil discharged from an oil pump OP; a power transmission mechanism TS, an oil pump OP, a first strainer 1, a hydraulic control device 2, and a case 9 including a first storage chamber CM1 for storing oil, The first strainer 1 has a first connection port 1a which is a connection port for transferring oil to and from a hydraulic control device 2, The hydraulic control device 2 has a second connection port 2a connected to the first connection port 1a, The case 9 includes a first case portion 91 and a second case portion 92 joined to the first case portion 91 to form a first housing chamber CM1 together with the first case portion 91. The direction in which the first case part 91 and the second case part 92 are joined to each other is defined as a joining direction J, the side in the joining direction J where the first case part 91 is disposed relative to the second case part 92 is defined as a joining direction first side J1, and the side opposite to the joining direction first side J1 is defined as a joining direction second side J2. The first strainer 1 is fixed to the first case portion 91 with the first connection port 1a facing the second side J2 in the joining direction, The hydraulic control device 2 is fixed to the second case portion 92 with the second connection port 2a facing the first side J1 in the joining direction, With the first case portion 91 and the second case portion 92 joined together, the first connection port 1a and the second connection port 2a are connected via a seal member 10.

[0066] According to this configuration, the case 9 includes a first case portion 91 and a second case portion 92 joined to the first case portion 91. The first strainer 1 and the hydraulic control device 2 are separated and fixed to the first case portion 91 and the second case portion 92, respectively. This makes it easy to ensure sufficient space for arranging the first strainer 1 and the hydraulic control device 2, even if the size of the case 9 is limited. Furthermore, according to this configuration, by joining the first case part 91 to which the first strainer 1 is fixed with the first connection port 1a facing the second side J2 in the joining direction and the second case part 92 to which the hydraulic control device 2 is fixed with the second connection port 2a facing the first side J1 in the joining direction, the first connection port 1a and the second connection port 2a can be connected via the seal member 10. This makes it easy to simplify the process of connecting the first connection port 1a and the second connection port 2a and joining the first case part 91 and the second case part 92.

[0067] As shown in FIG. 5, in this embodiment, the first strainer 1 includes a main body portion 11, a suction portion 12, and a fixing portion 13.

[0068] A space communicating with the first connection port 1a is formed inside the main body 11. In this embodiment, the main body 11 is formed in a hollow rectangular parallelepiped shape.

[0069] A space communicating with the inside of the main body 11 is formed inside the suction part 12. The suction part 12 is disposed in an oil reservoir formed inside the case 9. The suction part 12 is configured to suck oil from the oil reservoir as the first oil pump OP1 is driven.

[0070] The fixing portion 13 is configured to be fixed to the first case portion 91 by a first fastening member F1. In this embodiment, the fixing portion 13 is formed to protrude from the main body portion 11. In the illustrated example, two fixing portions 13 are arranged, one of which protrudes from the main body portion 11 to the upper side V1 and the other of which is formed to protrude from the main body portion 11 to the rear side D2.

[0071] 3, in this embodiment, the first strainer 1 is disposed so as to overlap with the first rotor gear Gr1 when viewed in the up-down direction along the up-down direction V. This configuration makes it easy to keep the dimension of the vehicle drive device 100 in the front-rear direction D small.

[0072] In addition, in this embodiment, the fixing portion 13 is disposed on the rear side D2 with respect to the second axis X2. That is, in this embodiment, the first strainer 1 is fixed to the first case portion 91 at a position close to the end of the rear side D2 in the first housing chamber CM1. The suction portion 12 is formed so as to protrude from the main body portion 11 to the front side D1. With this configuration, the first strainer 1 can be fixed to the first case portion 91 so as to avoid interference with other elements, while the suction portion 12 can be disposed close to the center of the first housing chamber CM1 in the front-rear direction D. As a result, the oil can be appropriately sucked from the suction portion 12 without being affected by changes in the oil level caused by the vehicle equipped with the vehicle drive device 100 tilting in the front-rear direction D.

[0073] 4 and 5, in this embodiment, the first strainer 1 is disposed in the space of the first housing chamber CM1 on the first joining direction side J1 relative to the second oil pump OP2. In the example shown in Fig. 5, the main body 11 of the first strainer 1 is disposed on the rear side D2 relative to the second oil pump OP2 and extends further toward the first joining direction side J1 than the second oil pump OP2. The suction portion 12 of the first strainer 1 is disposed on the first joining direction side J1 relative to the second oil pump OP2 and at a position overlapping with the second oil pump OP2 as viewed in the joining direction along the joining direction J.

[0074] In this embodiment, the second strainer 4 is fixed to a lower part of the second oil pump OP2, as shown in Fig. 3. In the example shown in Fig. 3, the suction portion 12 of the first strainer 1 is disposed on the first joining direction side J1 of the second strainer 4 and at a position overlapping with the second strainer 4 as viewed in the joining direction along the joining direction J.

[0075] As described above, in this embodiment, the vehicle drive device 100 is The power transmission mechanism further includes an engagement device that connects and disconnects power transmission in the power transmission mechanism, The oil pump OP includes a first oil pump OP1 driven by a driving force transmitted through a portion of the power transmission mechanism TS that is closer to the input member I than the engagement device CL, and a second oil pump OP2 driven by a driving force transmitted through a portion of the power transmission mechanism TS that is closer to the output member O than the engagement device CL, The second oil pump OP2 is fixed to the first case portion 91 so as to be accommodated in the first accommodation chamber CM1. The first strainer 1 is disposed in a space in the first housing chamber CM1 on a first side J1 in the joining direction with respect to the second oil pump OP2.

[0076] According to this configuration, in a configuration including the second oil pump OP2 in addition to the first oil pump OP1, the first strainer 1 can be disposed by utilizing the space on the first joining direction first side J1 relative to the second oil pump OP2 in the first housing chamber CM1, while the second oil pump OP2 is fixed to the first case portion 91. This makes it possible to ensure the disposition space for the first strainer 1, while preventing the vehicle drive device 100 from becoming larger.

[0077] 3, in this embodiment, the vehicle drive device 100 further includes an oil passage component 3 that configures at least a part of an oil supply passage P that supplies the oil discharged by the second oil pump OP2 to the engagement device CL. In this embodiment, the engagement device CL is lubricated by the oil supplied from the second oil pump OP2 to the engagement device CL.

[0078] The oil passage component 3 is fixed to the first case portion 91. The oil passage component 3 is attached to the second oil pump OP2 so that the supply oil passage P is connected to the discharge port of the second oil pump OP2. In this embodiment, the oil passage component 3 extends from the second oil pump OP2 to the front side D1 so as to pass through the lower side V2 with respect to the fourth axis X4. The oil passage component 3 extends from the lower side V2 with respect to the fourth axis X4 to the upper side V1 so as to pass through the front side D1 with respect to the fourth axis X4, the fifth axis X5, and the third axis X3. Furthermore, the oil passage component 3 extends from the front side D1 with respect to the third axis X3 to the upper side V1 with respect to the engagement device CL through the upper side V1 with respect to the third axis X3. In this way, in this embodiment, oil is supplied from the upper side V1 to the engagement device CL by the supply oil passage P (see the black arrow in FIG. 3).

[0079] As described above, in the present embodiment, the vehicle drive device 100 further includes the oil passage component 3 that configures at least a portion of the supply oil passage P that supplies the oil discharged by the second oil pump OP2 to the engagement device CL, An oil passage component member 3 is fixed to the first case portion 91 and is attached to the second oil pump OP2.

[0080] According to this configuration, both the oil passage component member 3 and the second oil pump OP2, which are connected to each other, are fixed to the first case portion 91. This makes it easy to simplify the assembly process of the oil passage component member 3, and in turn, to simplify the process of joining the first case portion 91 and the second case portion 92.

[0081] In this embodiment, the oil supply passage P includes an oil passage formed in the case 9. In this embodiment, oil discharged from the second oil pump OP2 passes through the oil passage formed in the case 9 and is supplied to the second differential bearing B42, the second counter bearing B72, the first counter bearing B71, the sixth rotor bearing B34, and the fifth rotor bearing B33 (see FIG. 1).

[0082] As shown in FIG. 1, in this embodiment, an output gear Gd serving as an output member O that meshes with the pump drive gear Gp is ​​disposed so as to overlap with the first case portion 91 when viewed in the radial direction R.

[0083] In this manner, in this embodiment, the direction perpendicular to the rotation axis of the output member O is defined as the radial direction R, The output member O is an output gear Gd that is arranged so as to overlap with the first case portion 91 when viewed in the radial direction R. The second oil pump OP2 is configured to be driven by the rotation of a pump drive gear Gp that meshes with the output gear Gd.

[0084] According to this configuration, the second oil pump OP2, which is driven by rotation of the pump drive gear Gp that meshes with the output gear Gd, is fixed to the first case portion 91 that is arranged so that the output gear Gd overlaps when viewed in the radial direction R. This makes it easy to simplify the assembly process of the second oil pump OP2, and in turn, to simplify the process of joining the first case portion 91 and the second case portion 92.

[0085] Other embodiments (1) In the above embodiment, the vehicle drive device 100 drives the wheels W with the driving force of the internal combustion engine EG and the rotating electric machines MG1 and MG2, that is, the vehicle drive device 100 is a drive device for a hybrid vehicle. However, the present invention is not limited to such a configuration, and the vehicle drive device 100 may be configured to drive the wheels W only with the driving force of the internal combustion engine EG. Alternatively, the drive force source S may be a rotating electric machine instead of the internal combustion engine EG, that is, the vehicle drive device 100 may be a drive device for an electric vehicle.

[0086] (2) In the above embodiment, the case 9 has been described as having three case parts (the first case part 91, the second case part 92, and the third case part 93) joined together. However, the present invention is not limited to such a configuration, and the case 9 may be composed of two or four or more case parts.

[0087] (3) The configurations disclosed in the above-described embodiments can be applied in combination with configurations disclosed in other embodiments, as long as no contradiction occurs. As for other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications can be made as appropriate within the scope of the present disclosure. [Industrial Applicability]

[0088] The technology disclosed herein can be utilized in a vehicle drive system including an input member drivingly connected to a drive force source, an output member drivingly connected to wheels, a power transmission mechanism that transmits power between them, an oil pump driven by the drive force transmitted through the power transmission mechanism, a strainer that filters oil sucked into the oil pump, and a hydraulic control device that includes a control valve that controls the oil discharged from the oil pump. [Explanation of symbols]

[0089] 100: vehicle drive device, 1: first strainer (strainer), 1a: first connection port, 2: hydraulic control device, 2a: second connection port, 3: oil passage component, 9: case, 91: first case part, 92: second case part, 10: seal member, CM1: first housing chamber (housing chamber), I: input member, O: output member, TS: power transmission mechanism, OP: oil pump, OP1: first oil pump, OP2: second oil pump, Gp: pump drive gear, CL: engagement device, P: supply oil passage, S: drive force source, W: wheel, J: joining direction, J1: first joining direction side, J2: second joining direction side, R: radial direction

Claims

1. an input member drivingly connected to a drive force source; An output member drivingly connected to the wheels; a power transmission mechanism for transmitting power between the input member and the output member; an oil pump driven by a driving force transmitted through the power transmission mechanism; a strainer for filtering the oil drawn by the oil pump; a hydraulic control device including a control valve for controlling the oil discharged from the oil pump; a case including the power transmission mechanism, the oil pump, the strainer, the hydraulic control device, and a storage chamber that stores oil, The strainer includes a first connection port which is a connection port for transferring oil to and from the hydraulic control device, The hydraulic control device includes a second connection port connected to the first connection port, the case includes a first case portion and a second case portion joined to the first case portion to form the accommodation chamber together with the first case portion, a joining direction in which the first case portion and the second case portion are joined to each other, a side in the joining direction on which the first case portion is disposed relative to the second case portion is a joining direction first side, and a side opposite to the joining direction first side is a joining direction second side, The strainer is fixed to the first case portion with the first connection port facing the second joining direction, The hydraulic control device is fixed to the second case portion with the second connection port facing the first joining direction, A vehicle drive device, wherein the first connection port and the second connection port are connected via a seal member when the first case portion and the second case portion are joined together.

2. The power transmission mechanism further includes an engagement device that connects and disconnects power transmission, the oil pump includes a first oil pump driven by a driving force transmitted through a portion of the power transmission mechanism closer to the input member than the engagement device, and a second oil pump driven by a driving force transmitted through a portion of the power transmission mechanism closer to the output member than the engagement device, the second oil pump is fixed to the first case portion so as to be accommodated in the accommodation chamber, The vehicle drive device according to claim 1 , wherein the strainer is disposed in a space in the accommodation chamber on a first side in the joining direction with respect to the second oil pump.

3. an oil passage component that configures at least a portion of an oil supply passage that supplies oil discharged by the second oil pump to the engagement device, The vehicle drive device according to claim 2 , wherein the oil passage component member is fixed to the first case portion and attached to the second oil pump.

4. A direction perpendicular to the rotation axis of the output member is defined as a radial direction, the output member is an output gear arranged so as to overlap with the first case portion as viewed in a radial direction along the radial direction, 4. The vehicle drive device according to claim 2, wherein the second oil pump is configured to be driven by rotation of a pump drive gear that meshes with the output gear.

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