Vehicle drive device

Abstract

This vehicle drive device comprises a rotating electrical machine (1), a power transmission mechanism, an inverter module (5), and a case (4). The case (4) comprises a first accommodation chamber (R1) in which the rotating electrical machine (1) and the power transmission mechanism are accommodated, a second accommodation chamber (R2) in which the inverter module (5) is accommodated, and a partition wall (45) by which the first accommodation chamber (R1) and the second accommodation chamber (R2) are partitioned from one another. An electric oil pump (OP) that suctions and discharges oil within the case (4) is also accommodated in the first accommodation chamber (R1). A control signal line (73) that supplies a control signal to the electric oil pump (OP) and a power source line (74) that supplies operative power to the electric oil pump (OP) are disposed so as to pass through a shared connector (CN1) provided to the partition wall (45).

Description

Vehicle drive unit

[0001] The present invention relates to a vehicle drive device including a rotating electric machine, an output member drivingly connected to a wheel, a power transmission mechanism that transmits driving force between the rotating electric machine and the output member, an inverter module for driving and controlling the rotating electric machine, and a case.

[0002] An example of the above-described vehicle drive device is disclosed in International Publication No. 2022 / 209600 (Patent Document 1). Hereinafter, in the description of the background art, reference numerals in parentheses refer to those in Patent Document 1. The vehicle drive device (17) of Patent Document 1 includes a rotating electric machine (1), output members (6A, 6B), a power transmission mechanism (7), a drive device (70) including an inverter module (72) and a control device (74), and a case (2). The case (2) includes a motor accommodating chamber (SP1) that accommodates the rotating electric machine (1), a gear accommodating chamber (SP2) that accommodates the power transmission mechanism (7), an inverter accommodating chamber (SP3) that accommodates the drive device (70), and a second partition wall portion (2508) that separates the motor accommodating chamber (SP1), the gear accommodating chamber (SP2), and the inverter accommodating chamber (SP3). The vehicle drive device (17) further includes an electric oil pump (90) disposed in the gear housing (SP2). The electric oil pump (90) is connected to a control device (74) that controls the electric oil pump (90) via a wiring (L111), a relay connector (CN1) provided in the second partition wall portion (2508), and a wiring (L120). In this manner, in the vehicle drive device (17) of Patent Document 1, the wiring (L111) and the wiring (L120) constitute a control signal line that supplies a control signal to the electric oil pump (90).

[0003] International Publication No. 2022 / 209600

[0004] As described above, in the vehicle drive system of Patent Document 1, a control signal line that supplies a control signal to an electric oil pump housed in a case is arranged to pass through a connector provided in a partition wall. Not only the control signal line but also a power supply line that supplies operating power to the electric oil pump is connected to the electric oil pump housed in the case. It is naturally desirable to arrange such a power supply line while suppressing an increase in the cost of the entire system.

[0005] Therefore, it is desirable to realize a technology that enables the placement of power lines that supply operating power to an electric oil pump housed in a case while suppressing increases in the cost of the entire device.

[0006] The vehicle drive device of the present disclosure is a vehicle drive device comprising a rotating electric machine, an output member drivingly connected to a wheel, a power transmission mechanism that transmits driving force between the rotating electric machine and the output member, an inverter module for driving and controlling the rotating electric machine, and a case, wherein the case comprises a first storage chamber that accommodates the rotating electric machine and the power transmission mechanism, a second storage chamber that accommodates the inverter module, and a partition wall that separates the first storage chamber from the second storage chamber, wherein the first storage chamber accommodates an electric oil pump that sucks in and discharges oil within the case, and a control signal line that supplies a control signal to the electric oil pump and a power supply line that supplies operating power to the electric oil pump are arranged to pass through a common connector provided on the partition wall.

[0007] According to this configuration, the power supply line that supplies operating power to the electric oil pump can be drawn from the first housing chamber that houses the electric oil pump to the second housing chamber, similar to the control signal line, without providing a connector separate from the connector through which the control signal line that supplies control signals to the electric oil pump is passed. Therefore, compared to when a dedicated connector is provided for drawing the power supply line from the first housing chamber to the second housing chamber, the power supply line can be arranged while suppressing an increase in the cost of the entire device. As described above, according to this configuration, the power supply line that supplies operating power to the electric oil pump housed in the case can be arranged while suppressing an increase in the cost of the entire device.

[0008] Further features and advantages of the vehicle drive device will become clear from the following description of the embodiments described with reference to the drawings.

[0009] Cross-sectional view of the vehicle drive device according to the embodiment Skeleton diagram of the vehicle drive device according to the embodiment Schematic diagram of a vehicle equipped with the vehicle drive device according to the embodiment Schematic configuration diagram of the inverter module according to the embodiment View of the vehicle drive device according to the embodiment from the first side in the first direction View of the vehicle drive device according to the embodiment from the second side in the axial direction View of the vehicle drive device according to the embodiment from the second side in the first direction View of the vehicle drive device according to the embodiment from the first side in the axial direction View of the vehicle drive device according to the embodiment from the first side in the second direction View of the vehicle drive device according to the embodiment from the second side in the second direction Exploded perspective view of the vehicle drive device according to the embodiment Exploded perspective view of the vehicle drive device according to the embodiment View of the inside of the case according to the embodiment from the second side in the axial direction Perspective view of the inside of the case according to the embodiment from the second side in the axial direction Partial enlarged view of FIG. 14 View showing a state where some members are removed from FIG. 15 View of the inside of the case according to the embodiment from the first side in the axial direction Partial enlarged view of FIG. 17 View showing a state where the parking lock mechanism is switched to the locked state in FIG. 18 Perspective view of the second accommodation chamber according to the embodiment from the first side in the second direction View of the first accommodation chamber according to the embodiment from the second side in the axial direction View of the first accommodation chamber according to the embodiment from the first side in the axial direction Schematic diagram showing the electrical connection configuration of each element of the vehicle drive device according to the embodiment Schematic diagram showing the terminal layout in the first connector according to the embodiment Schematic diagram schematically showing the oil flow in the vehicle drive device according to the embodiment

[0010] Embodiments of the vehicle drive device will be described with reference to the drawings.

[0011] In this specification, the term "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 transmission members may also include engagement devices that selectively transmit rotation and driving force, such as friction engagement devices and meshing engagement devices.

[0012] In this specification, the term "rotating electric machine" is used as a concept that includes a motor (electric motor), a generator (electric generator), and a motor-generator that functions as both a motor and a generator as needed.

[0013] In this specification, with regard to the arrangement of two elements, "overlapping when viewed in a particular direction" means that when an imaginary line parallel to the line of sight is moved in each direction perpendicular to the imaginary line, there is at least a partial area where the imaginary line intersects both of the two elements.

[0014] [Overall configuration] As shown in Figures 1 and 2, the vehicle drive device 100 includes a rotating electric machine 1, output members (31, 32) drivingly connected to wheels (W1, W2), a power transmission mechanism 2 that transmits driving force between the rotating electric machine 1 and the output members (31, 32), an inverter module 5 for driving and controlling the rotating electric machine 1, and a case 4.

[0015] The vehicle 200 (see FIG. 3 ) on which the vehicle drive device 100 is mounted is an electric vehicle, such as a battery electric vehicle (BEV), that includes a rotating electric machine 1 as a driving power source for wheels (W1, W2). As shown in FIG. 4 , the vehicle 200 is provided with a DC power source BT, such as a battery or a capacitor, and the rotating electric machine 1 is electrically connected to the DC power source BT via an inverter circuit 50 included in an inverter module 5. The rotating electric machine 1 generates driving force by running using electric power stored in the DC power source BT. Furthermore, the rotating electric machine 1 generates electricity using driving force transmitted to the rotating electric machine 1, such as driving force transmitted from the wheels (W1, W2), and charges the DC power source BT.

[0016] The vehicle drive device 100 transmits the driving force of the rotating electric machine 1 to the wheels (W1, W2) to drive the vehicle 200. In this embodiment, the vehicle drive device 100 is configured to transmit only the driving force of the rotating electric machine 1 to the wheels (W1, W2). Alternatively, the vehicle 200 may be provided with a driving force source (for example, an internal combustion engine) separate from the rotating electric machine 1, and the vehicle drive device 100 may be configured to transmit the driving force of the separate driving force source to the wheels (W1, W2).

[0017] The vehicle drive device 100 is configured to transmit the driving force of the rotating electric machine 1 to one or more wheels (W1, W2). As shown in Fig. 3, in this embodiment, the vehicle drive device 100 is configured to transmit the driving force of the rotating electric machine 1 to a first wheel W1 and a second wheel W2. The first wheel W1 and the second wheel W2 are a pair of left and right wheels (a pair of left and right front wheels in the example shown in Fig. 3). In this embodiment, each of the first wheel W1 and the second wheel W2 corresponds to a "wheel".

[0018] As shown in FIG. 1 , the rotational axis of the rotating electric machine 1 (specifically, the rotor 10 described later) is defined as a "first axis A1," the direction along the first axis A1 is defined as an "axial direction L," one side of the axial direction L is defined as an "axial first side L1," and the other side of the axial direction L is defined as an "axial second side L2." Also, as shown in FIG. 6 , two directions that are orthogonal to each other in an axial view along the axial direction L (specifically, two directions that are orthogonal to each other on a plane orthogonal to the axial direction L) are defined as a first direction X and a second direction Y. That is, the first direction X, the second direction Y, and the axial direction L are three directions that are orthogonal to each other. One side of the first direction X is defined as a "first direction first side X1," the other side of the first direction X is defined as a "first direction second side X2," one side of the second direction Y is defined as a "second direction first side Y1," and the other side of the second direction Y is defined as a "second direction second side Y2."

[0019] In this embodiment, the vehicle drive device 100 is mounted on the vehicle 200 in the orientation shown in Fig. 3. In Fig. 3, the left side of the drawing represents the front side of the vehicle 200, and the upper side of the drawing represents the right side of the vehicle 200. Therefore, in a vehicle-mounted state in which the vehicle drive device 100 is mounted on the vehicle 200, the first direction X is along the front-to-rear direction of the vehicle 200, the second direction Y is along the vertical direction, and the axial direction L is along the left-to-right direction of the vehicle 200. In the vehicle-mounted state, the first direction first side X1 is the front side of the vehicle 200, the first direction second side X2 is the rear side of the vehicle 200, the second direction first side Y1 is the upper side (vertically upper side), the second direction second side Y2 is the lower side (vertically lower side), the axial first side L1 is the right side of the vehicle 200, and the axial second side L2 is the left side of the vehicle 200.

[0020] [Rotating Electric Machine] As shown in FIG. 1 , the rotating electric machine 1 includes a rotor 10 and a stator 14. The stator 14 is fixed to a case 4. The rotor 10 is supported by the case 4 so as to be rotatable relative to the stator 14. In this embodiment, the rotating electric machine 1 is an inner rotor type rotating electric machine, and the rotor 10 is disposed radially inward (in a direction perpendicular to the first axis A1; the same applies below) relative to the stator 14. Note that, in the radial direction, "inner" refers to the side closer to the first axis A1, and "outer" refers to the opposite side (i.e., the side farther from the first axis A1). In this embodiment, the rotating electric machine 1 is a permanent magnet type synchronous rotating electric machine, and the rotor 10 is provided with a permanent magnet (not shown). The rotating electric machine 1 may be a synchronous rotating electric machine other than a permanent magnet type (for example, a wound-field type synchronous rotating electric machine). In addition, the rotating electric machine 1 may be an induction rotating electric machine instead of a synchronous rotating electric machine.

[0021] The rotor 10 includes a rotor core 11 fixed to a rotor shaft 12. The rotor core 11 is formed in a cylindrical shape extending in the axial direction L. The rotor core 11 and a stator core 15 (described later) are formed, for example, by stacking multiple magnetic plates (e.g., electromagnetic steel plates such as silicon steel plates) in the axial direction L, or are formed primarily from a compacted powder material obtained by compressing and molding powder of a magnetic material. In this embodiment, the rotor core 11 is formed by stacking multiple magnetic plates in the axial direction L. End plates 13 are attached to end faces of the rotor core 11 in the axial direction L. A pair of end plates 13 are provided to sandwich the rotor core 11 from both sides in the axial direction L.

[0022] The stator 14 includes a stator core 15 fixed to the case 4 (specifically, a case main body 40, which will be described later). In this embodiment, the stator core 15 is formed by stacking multiple magnetic plates in the axial direction L. As shown in FIG. 16 , a coil 18 is wound around the stator core 15. Although not shown, the stator core 15 has multiple slots formed therein that extend in the axial direction L and are arranged in the circumferential direction (the direction circling around the first axis A1), and the coil 18 is wound around the multiple slots. In this embodiment, the rotating electric machine 1 is a rotating electric machine driven by three-phase AC, and the three-phase coils 18 are wound around the stator core 15. FIG. 4 illustrates an example in which the three-phase coils 18 are star-connected. As shown in FIG. 1 , portions of the coil 18 protruding from the stator core 15 form coil end portions 19. The coil end portions 19 are formed on both sides of the stator core 15 in the axial direction L.

[0023] As shown in Fig. 15, the stator 14 is provided with an immersion resin portion 19a. The immersion resin portion 19a is formed by immersing the coil end portion 19 (for example, the welded portion between the conductors that make up the coil 18) in a resin material, and has the function of insulating the coil end portion 19. The immersion resin portion 19a and a power line bus bar 61, which will be described later, are omitted from Fig. 16. Note that, since this can be understood by referring to Fig. 14, directional symbols are omitted from Figs. 15 and 16.

[0024] The stator core 15 is formed in a cylindrical shape extending in the axial direction L. In the present embodiment, the stator core 15 is provided with protrusions 16 for attaching the stator core 15 to the case 4, and a main body portion, which is the portion of the stator core 15 excluding the protrusions 16, is formed in a cylindrical shape. As shown in FIGS. 1 and 12 , the protrusions 16 are formed to protrude radially outward from the outer circumferential surface of the stator core 15 (specifically, the main body portion) and extend in the axial direction L. The stator core 15 is fastened and fixed to the case 4 by bolts 17 with the end faces of the protrusions 16 on the first axial side L1 abutting against attachment portions 47 provided on the case 4.

[0025] The vehicle drive device 100 includes a rotation sensor S3 that detects rotation of the rotor 10 of the rotary electric machine 1. As shown in FIG. 1 , the rotation sensor S3 includes a sensor rotor S3a that rotates integrally with the rotor 10 and a sensor stator S3b that is fixed to the case 4. As shown in FIG. 21 , the rotation sensor S3 (specifically, the sensor stator S3b) is formed in an annular plate shape centered on the first axis A1. In this embodiment, the rotation sensor S3 is disposed on a first axial side L1 with respect to the rotor core 11. Specifically, the rotation sensor S3 is disposed between the rotor core 11 and a later-described intermediate wall 46 of the case 4 in the axial direction L. The sensor rotor S3a is fixed to a portion of the rotor shaft 12 that is disposed on the first axial side L1 with respect to the rotor core 11, and the sensor stator S3b is fixed to the intermediate wall 46. While a resolver is used as the rotation sensor S3 in this example, various rotation sensors, such as an inductive position sensor, may be used.

[0026] The vehicle drive device 100 includes a first temperature sensor S1 that detects the temperature of the stator 14 of the rotating electric machine 1. The first temperature sensor S1 and a second temperature sensor S2 (described later) may be, for example, a thermistor whose resistance value changes with temperature. A control device 52 (see FIG. 4) (described later) controls the rotating electric machine 1 and an electric oil pump OP (described later), for example, based on the temperature of the stator 14 detected by the first temperature sensor S1. In this embodiment, the first temperature sensor S1 and a second temperature sensor S2 (described later) each correspond to a "temperature sensor."

[0027] In this embodiment, the first temperature sensor S1 detects the temperature of the coils 18 wound around the stator core 15 as the temperature of the stator 14. Specifically, as shown in FIG. 16 , the first temperature sensor S1 is provided to detect the temperature of the coil end portion 19 on the second axial side L2. Here, a neutral point bus bar 66 forming a neutral point is provided at the coil end portion 19 on the second axial side L2. The neutral point bus bar 66 electrically connects the neutral point terminals of the coils 18 of each phase to each other. The first temperature sensor S1 is attached to the neutral point bus bar 66.

[0028] [Power Transmission Mechanism] The power transmission mechanism 2 includes, for example, a transmission shaft and a gear. The power transmission mechanism 2 may include an engaging element such as a clutch or a brake. The power transmission mechanism 2 is configured to transmit driving force between the rotating electric machine 1 and one or more output members (31, 32). In this embodiment, the vehicle drive device 100 includes, as output members, a first output member 31 that is drivingly connected to the first wheel W1 and a second output member 32 that is drivingly connected to the second wheel W2. The power transmission mechanism 2 is configured to transmit driving force between the rotating electric machine 1 and a pair of output members, the first output member 31 and the second output member 32. In this embodiment, each of the first output member 31 and the second output member 32 corresponds to an "output member."

[0029] As described above, in this embodiment, the power transmission mechanism 2 is configured to transmit driving force between the rotating electric machine 1 and the pair of output members (31, 32). To this end, the power transmission mechanism 2 includes a differential gear mechanism 24 that distributes the rotation transmitted from the rotating electric machine 1 to the pair of output members (31, 32). In addition, in this embodiment, the power transmission mechanism 2 includes a counter gear mechanism 20 in a power transmission path between the rotating electric machine 1 (specifically, the rotor 10) and the differential gear mechanism 24. In this embodiment, the counter gear mechanism 20 is configured to reduce the rotation transmitted from the rotating electric machine 1 and transmit it to the differential gear mechanism 24.

[0030] In this embodiment, the counter gear mechanism 20 is disposed on a second axis A2 different from the first axis A1, and the differential gear mechanism 24 is disposed on a third axis A3 different from both the first axis A1 and the second axis A2. The first axis A1, the second axis A2, and the third axis A3 are parallel to one another. Alternatively, for example, the differential gear mechanism 24 may be disposed coaxially with the rotating electric machine 1 (i.e., on the first axis A1). Alternatively, for example, the power transmission mechanism 2 may be configured to include a planetary gear type transmission (e.g., a reducer) disposed coaxially with the rotating electric machine 1, instead of the counter gear mechanism 20.

[0031] In this embodiment, the three axes (A1 to A3) are arranged as shown in Figure 22. That is, the first axis A1 and the second axis A2 are arranged on the first side X1 in the first direction relative to the third axis A3. Furthermore, the second axis A2 is arranged on the second side Y2 in the second direction relative to the first axis A1. Here, the second axis A2 is arranged on the second side Y2 in the second direction relative to the third axis A3, and the first axis A1 is arranged on the first side Y1 in the second direction relative to the third axis A3.

[0032] The counter gear mechanism 20 includes a first gear 21, a second gear 22, and a counter shaft 23 that connects the first gear 21 and the second gear 22 so that they rotate integrally. The second gear 22 is formed to have a smaller diameter than the first gear 21 and is disposed on a first axial side L1 relative to the first gear 21. The first gear 21 meshes with an input gear 35 that rotates integrally with the rotor 10, and the second gear 22 meshes with a differential input gear 25 (described later). The input gear 35 is disposed on the first axial side L1 relative to the rotating electric machine 1 (specifically, the rotor core 11). The first gear 21 is formed to have a larger diameter than the input gear 35, and the second gear 22 is formed to have a smaller diameter than the differential input gear 25.

[0033] In this embodiment, the input gear 35 is provided on the input member 34. The input member 34 is connected to the rotor 10 so as to rotate integrally with the rotor 10. Specifically, the input member 34 is formed to extend along the axial direction L. A portion of the input member 34 on the second axial side L2 is connected (here, spline-connected) to a portion of the rotor shaft 12 on the first axial side L1. In this manner, the input member 34 is connected to the rotor shaft 12 so as to extend from the rotor shaft 12 to the first axial side L1. Note that the power transmission mechanism 2 may not include the input member 34, and the input gear 35 may be provided on the rotor shaft 12.

[0034] The differential gear mechanism 24 can be a differential gear mechanism of any structure, such as a bevel gear type or a planetary gear type. In this embodiment, the differential gear mechanism 24 is a bevel gear type differential gear mechanism and includes a differential input gear 25, a differential case 26, a pinion shaft 27, and a pinion gear 28. The differential case 26 is configured to rotate about a third axis A3, and the differential input gear 25 is connected to the differential case 26 so as to rotate integrally with the differential case 26. The pinion gear 28 is supported by the pinion shaft 27 that rotates integrally with the differential case 26, and rotates (spins) about the axis of the pinion shaft 27 and rotates (revolves) about the third axis A3. A side gear disposed on the first axial side L1 relative to the pinion shaft 27 and meshing with the pinion gear 28 is formed on the first output member 31 that rotates about the third axis A3, and a side gear disposed on the second axial side L2 relative to the pinion shaft 27 and meshing with the pinion gear 28 is formed on the second output member 32 that rotates about the third axis A3. In this way, in this embodiment, the members on which the side gears are formed are defined as the output members (31, 32).

[0035] As shown in FIG. 3 , the vehicle 200 is provided with a first drive shaft DS1 drivingly connected to a first wheel W1 and a second drive shaft DS2 drivingly connected to a second wheel W2. The drive shafts (DS1, DS2) are connected to the wheels (W1, W2) via, for example, constant velocity joints. The first output member 31 is connected to the first drive shaft DS1 so as to rotate integrally with the first drive shaft DS1, and the second output member 32 is connected to the second drive shaft DS2 so as to rotate integrally with the second drive shaft DS2. As shown in FIGS. 1 and 2 , in this embodiment, the first output member 31 is directly connected to the first drive shaft DS1, and the second output member 32 is connected to the second drive shaft DS2 via a connecting shaft 33. The connecting shaft 33 is connected to the second output member 32 so as to extend from the second output member 32 toward the second axial side L2.

[0036] [Parking Lock Mechanism] In this embodiment, the vehicle drive device 100 includes a parking lock mechanism 8. The parking lock mechanism 8 is a mechanism that restricts rotation of the parking gear 36. Restricting the rotation of the parking gear 36 locks the wheels (W1, W2). As shown in FIG. 1 , in this embodiment, the parking gear 36 is provided coaxially with the rotating electric machine 1 (i.e., on the first axis A1). Here, the parking gear 36 is coupled to the input member 34 so as to rotate integrally with the input member 34. The parking gear 36 is disposed between the input gear 35 and a third bearing B3 (described later) in the axial direction L. Note that the parking gear 36 is omitted from FIG. 2 .

[0037] 18 and 19, the parking lock mechanism 8 includes a parking pole 81, a detent plate 82, a detent spring 83, and a parking rod 86. These components (81 to 83, 86) of the parking lock mechanism 8 are housed in a transmission mechanism housing chamber R1b, which will be described later. Here, these components (81 to 83, 86) of the parking lock mechanism 8 are disposed on the first side X1 in the first direction relative to the parking gear 36. Note that, since this can be understood by referring to FIG. 17, reference symbols indicating directions have been omitted in FIGS. 18 and 19.

[0038] The parking pole 81 is supported by the case 4 so as to be swingable between a restricting position ( FIG. 19 ) in which rotation of the parking gear 36 is restricted and an unlocked position ( FIG. 18 ) in which rotation of the parking gear 36 is not restricted. In this embodiment, the parking pole 81 is supported by the case 4 so as to be swingable about an axis along the axial direction L. As shown in FIG. 19 , in the restricting position, the claws of the parking pole 81 engage with the parking gear 36, thereby establishing a locked state in which rotation of the parking gear 36 is restricted. As shown in FIG. 18 , in the unlocked position, the claws of the parking pole 81 are positioned away from the parking gear 36, thereby establishing an unlocked state in which rotation of the parking gear 36 is permitted. The parking pole 81 is biased by a biasing member 85 in a direction from the restricting position toward the unlocked position.

[0039] The parking rod 86 is configured to move forward and backward between an advanced position and a retracted position in conjunction with the pivoting of the detent plate 82. In this embodiment, the detent plate 82 is supported by the case 4 so as to be able to pivot freely about an axis along the first direction X. In this embodiment, the parking rod 86 is also disposed along the second direction Y. The parking rod 86 is connected to the detent plate 82 so as to move forward and backward in the second direction Y in conjunction with the pivoting of the detent plate 82. In this embodiment, the advanced position ( FIG. 19 ) is located on the second side Y2 in the second direction relative to the retracted position ( FIG. 18 ).

[0040] When the detent plate 82 is swung so that the parking rod 86 moves from the retracted position to the advanced position, a cam member (not shown) supported by the parking rod 86 presses the parking pole 81 against the biasing force of the biasing member 85, causing the parking pole 81 to swing from the non-restricted position to the restricted position ( FIG. 19 ). Also, when the detent plate 82 is swung so that the parking rod 86 moves from the advanced position to the retracted position, the pressure from the cam member is released, causing the parking pole 81 to swing from the restricted position to the non-restricted position due to the biasing force of the biasing member 85 ( FIG. 18 ). In this way, the position (swing position) of the parking pole 81 can be switched between the restricted position and the non-restricted position by swung the detent plate 82.

[0041] The position (swing position) of the detent plate 82 is maintained by the biasing force of the detent spring 83. Specifically, the detent plate 82 is formed with a recess corresponding to the retracted position and a recess corresponding to the advanced position. The detent spring 83 also includes an engaging portion 84 (here, a roller). The position of the detent plate 82 when the parking rod 86 is in the retracted position is defined as a "first position." When the parking rod 86 is in the retracted position, the engaging portion 84 engages with the recess corresponding to the retracted position, thereby maintaining the detent plate 82 in the first position. The position of the detent plate 82 when the parking rod 86 is in the advanced position is defined as a "second position." When the parking rod 86 is in the advanced position, the engaging portion 84 engages with the recess corresponding to the advanced position, thereby maintaining the detent plate 82 in the second position.

[0042] The parking lock mechanism 8 includes a parking actuator 80 for switching between a locked state in which rotation of the parking gear 36 is restricted and an unlocked state in which rotation of the parking gear 36 is permitted. For example, an electric actuator can be used as the parking actuator 80. The parking actuator 80 is configured to move the parking rod 86 forward and backward. In this embodiment, the parking actuator 80 is configured to move the parking rod 86 forward and backward by swinging a detent plate 82. As shown in FIG. 5 , the parking actuator 80 is attached to the outer surface of the case 4. Here, the parking actuator 80 is attached to the outer surface of the case 4 (specifically, the case main body 40, which will be described later) on the first side X1 in the first direction.

[0043] [Inverter Module] As shown in Fig. 4 , the inverter module 5 includes an inverter circuit 50. In this embodiment, the inverter module 5 further includes a control device 52 and a DC link capacitor 53 (smoothing capacitor). The control device 52 is configured, for example, by mounting electronic components on a control board. The inverter circuit 50, the control device 52, and the DC link capacitor 53 are modularized as the inverter module 5. Note that one or both of the control device 52 and the DC link capacitor 53 may be provided separately from the inverter module 5 without being modularized as the inverter module 5.

[0044] The inverter circuit 50 is configured to convert power between direct current and multiple-phase (three-phase, in this embodiment) alternating current. The inverter circuit 50 generates AC power to be supplied to the rotating electric machine 1. The inverter circuit 50 is configured using multiple switching elements 51. The inverter circuit 50 is, for example, a power module in which multiple elements including the multiple switching elements 51 are modularized. The switching elements 51 may be power transistors such as insulated gate bipolar transistors (IGBTs), power metal oxide semiconductor field effect transistors (MOSFETs), or high electron mobility transistors (HEMTs). The inverter circuit 50 includes multiple arms each formed by a series circuit of an upper-stage switching element 51 and a lower-stage switching element 51. The multiple arms are connected in parallel to form a bridge circuit. In the example shown in FIG. 4 , the inverter circuit 50 includes one arm corresponding to each of the three phases, and the three arms are connected in parallel to form a bridge circuit.

[0045] The midpoint of each arm of the inverter circuit 50 (the connection point between the upper-stage switching element and the lower-stage switching element) is connected to the coil 18, and the inverter circuit 50 supplies multi-phase (three-phase in this embodiment) AC power to the coil 18. A DC link capacitor 53 that smoothes the voltage on the DC side of the inverter circuit 50 is provided on the DC side of the inverter circuit 50 (i.e., between the inverter circuit 50 and the DC power source BT).

[0046] The control device 52 controls the inverter circuit 50. Specifically, the control device 52 controls the switching of the inverter circuit 50, which is configured using a plurality of switching elements 51, to cause the inverter circuit 50 to convert power between direct current and multi-phase (three-phase in this embodiment) alternating current. The control device 52 also controls the electric oil pump OP, which will be described later. The control device 52 controls the inverter circuit 50 and the electric oil pump OP, for example, based on commands from a higher-level control device than the control device 52 (for example, a vehicle control device (not shown) that controls the entire vehicle). The control device 52 is configured with a logic circuit such as a microcomputer as its core component. Each function of the control device 52 is realized by cooperation between hardware such as the microcomputer and software (programs).

[0047] The control device 52 controls the rotating electric machine 1 via the inverter circuit 50 so that the rotating electric machine 1 outputs a target torque. The target torque is determined by the control device 52 or by another device (e.g., the vehicle control device described above) that can communicate with the control device 52. In the latter case, the target torque determined by the other device is provided to the control device 52. In this embodiment, the control device 52 performs current feedback control based on the target torque, the rotational position of the rotor 10 (in this embodiment, the magnetic pole position of the field), the rotational speed of the rotor 10, and the current flowing through the coils 18 (stator coils) of each phase, thereby controlling the rotating electric machine 1 via the inverter circuit 50. As shown in FIG. 4 , the current flowing through the coils 18 is detected by a current sensor S4, and the rotational position and rotational speed of the rotor 10 are detected by a rotation sensor S3.

[0048] 1, the case 4 includes a first storage chamber R1, a second storage chamber R2, and a partition wall 45 that separates the first storage chamber R1 from the second storage chamber R2. In this embodiment, the partition wall 45 separates the first storage chamber R1 from the second storage chamber R2 at least in the second direction Y. The second storage chamber R2 is disposed on the first side Y1 in the second direction relative to the first storage chamber R1.

[0049] In this embodiment, the case 4 further includes an intermediate wall 46 that divides the first accommodation chamber R1 into a rotating electric machine accommodation chamber R1a and a transmission mechanism accommodation chamber R1b (see FIG. 25). Note that the reference numerals for the rotating electric machine accommodation chamber R1a and the transmission mechanism accommodation chamber R1b are omitted in FIG. 1. The intermediate wall 46 divides the rotating electric machine accommodation chamber R1a and the transmission mechanism accommodation chamber R1b in the axial direction L. The rotating electric machine accommodation chamber R1a is disposed on the second axial side L2 with respect to the transmission mechanism accommodation chamber R1b. That is, the portion of the first accommodation chamber R1 on the second axial side L2 with respect to the intermediate wall 46 is the rotating electric machine accommodation chamber R1a, and the portion of the first accommodation chamber R1 on the first axial side L1 with respect to the intermediate wall 46 is the transmission mechanism accommodation chamber R1b.

[0050] The rotating electric machine 1 and the power transmission mechanism 2 are accommodated in the first accommodation chamber R1. Here, "accommodated" means that at least a portion of the object to be accommodated is accommodated. The rotating electric machine 1 is accommodated in the rotating electric machine accommodation chamber R1a. Specifically, the rotor core 11, the rotor shaft 12, the stator core 15, and the coil end portion 19 are accommodated in the rotating electric machine accommodation chamber R1a. The power transmission mechanism 2 is accommodated in the transmission mechanism accommodation chamber R1b. Specifically, the counter gear mechanism 20, the differential gear mechanism 24, the first output member 31, the second output member 32, the input member 34, the input gear 35, and the parking gear 36 are accommodated in the transmission mechanism accommodation chamber R1b. The input member 34 is disposed to penetrate the intermediate wall 46 in the axial direction L, and a portion of the input member 34 on the second axial side L2 is accommodated in the rotating electric machine accommodation chamber R1a. In addition, the connecting shaft 33 is arranged to penetrate the intermediate wall 46 in the axial direction L, and the portion of the connecting shaft 33 on the first axial side L1 is accommodated in the transmission mechanism accommodating chamber R1b, and the portion of the connecting shaft 33 on the second axial side L2 is accommodated in the rotating electric machine accommodating chamber R1a.

[0051] The inverter module 5 is accommodated in the second accommodation chamber R2. Specifically, the inverter circuit 50 is accommodated in the second accommodation chamber R2. In this embodiment, the control device 52 and the DC link capacitor 53 are also accommodated in the second accommodation chamber R2. The inverter module 5 is fixed to the case 4 (here, the case main body 40 described later) by fastening members such as bolts.

[0052] In this embodiment, the case 4 includes a case main body 40, a first cover 41, a second cover 42, and a third cover 43. The first storage chamber R1 is formed by being surrounded by the case main body 40, the first cover 41, and the second cover 42, and the second storage chamber R2 is formed by being surrounded by the case main body 40 and the third cover 43.

[0053] 11 and 12 , the case body 40 has openings on both sides in the axial direction L. The first cover 41 is fixed to the case body 40 so as to close the opening on the first axial side L1 of the case body 40, and the second cover 42 is fixed to the case body 40 so as to close the opening on the second axial side L2 of the case body 40. The case body 40 has a peripheral wall that surrounds the rotating electric machine 1 and the power transmission mechanism 2 from the outside in the radial direction, and the first housing chamber R1 is formed by being surrounded by this peripheral wall, the first cover 41, and the second cover 42. The first cover 41 has a first opening 41a through which the first drive shaft DS1 is inserted, and the second cover 42 has a second opening 42a through which the second drive shaft DS2 is inserted.

[0054] As shown in FIG. 20 , a tank-shaped space that opens to the outside (here, the first side Y1 in the second direction) is formed on the outer surface of the peripheral wall of the case main body 40. This tank-shaped space is surrounded by a side wall that extends from the outer surface of the peripheral wall to the outside (here, the first side Y1 in the second direction). A second connector CN2, a third connector CN3, and a second connection port T2 (see FIGS. 5 to 7 ), which will be described later, are provided in through holes formed in this side wall. A third cover 43 is fixed to the case main body 40 so as to close the opening of the tank-shaped space (see FIGS. 1 and 9 ). The second storage chamber R2 is surrounded by the peripheral wall, the side wall, and the third cover 43. A portion of the peripheral wall of the case main body 40 (specifically, the portion that forms the bottom of the tank-shaped space) forms a partition wall 45 that separates the first storage chamber R1 from the second storage chamber R2.

[0055] The first cover part 41, the second cover part 42, and the third cover part 43 are fastened to the case main body part 40 by fastening members such as bolts. A sealing material such as a formed-in-place gasket (FIPG) is provided on a first joint surface J1, which is the joint surface between the first cover part 41 and the case main body part 40, and a second joint surface J2, which is the joint surface between the second cover part 42 and the case main body part 40.

[0056] In this embodiment, the portion that forms the first storage chamber R1, the portion that forms the second storage chamber R2, and the portion that forms the partition wall 45 are integrally formed in the case main body 40, which is a single member (for example, a single member made of a common material manufactured using a one-piece molding technique by casting). In this embodiment, the portion that forms the intermediate wall 46 is also integrally formed in the case main body 40.

[0057] [Mount Attachment Portion] The vehicle drive device 100 is supported on the vehicle body (e.g., a cross member) of the vehicle 200 via mount devices (not shown). In this embodiment, the vehicle drive device 100 is supported on the vehicle body via three mount devices. Therefore, as shown in FIGS. 6 to 8 , the case 4 is provided with a first mount attachment portion M1 to which one mount device is attached, a second mount attachment portion M2 to which another mount device is attached, and a third mount attachment portion M3 to which the remaining mount device is attached. In this embodiment, a mount bracket included in the mount device is fastened and fixed to the mount attachment portions (M1 to M3) with fastening members such as bolts. Therefore, the mount attachment portions (M1 to M3) are formed with fastening portions (here, fastening holes) to which the fastening members are fastened. Specifically, the mount attachment portions (M1 to M3) are formed as cylindrical boss portions with fastening portions formed therein.

[0058] As shown in FIGS. 6 to 8 , in this embodiment, first mount attachment portions M1 (four first mount attachment portions M1 in this example) are formed on the outer surface of the first cover portion 41, second mount attachment portions M2 (four second mount attachment portions M2 in this example) are formed on the outer surface of the second cover portion 42, and third mount attachment portions M3 (four third mount attachment portions M3 in this example) are formed on the outer surface of the case main body 40 in the first direction second side X2. As is clear from FIGS. 5 to 10 , reinforcing ribs are formed on the outer surface of the case 4. For example, as shown in FIG. 8 , a plurality of ribs, including ribs connecting different first mount attachment portions M1, are formed on the outer surface of the first cover portion 41.

[0059] [Bearings] As shown in Fig. 1, in this embodiment, the vehicle drive device 100 includes a first bearing B1, a second bearing B2, a third bearing B3, a fourth bearing B4, a fifth bearing B5, a sixth bearing B6, a seventh bearing B7, an eighth bearing B8, and a ninth bearing B9. In the example shown in Fig. 1, of these nine bearings (B1 to B9), the seventh bearing B7 and the eighth bearing B8 are roller bearings (specifically, tapered roller bearings), and the remaining bearings are ball bearings. The case 4 is formed with support portions (for example, holes into which the outer rings fit and cylindrical portions into which the inner rings fit) that support these bearings (B1 to B9).

[0060] The first bearing B1 rotatably supports a portion of the rotor shaft 12 arranged on a first axial side L1 with respect to the rotor core 11 relative to the case 4 (here, the intermediate wall 46). The second bearing B2 rotatably supports a portion of the rotor shaft 12 arranged on a second axial side L2 with respect to the rotor core 11 relative to the case 4 (here, the second cover portion 42).

[0061] The third bearing B3 rotatably supports a portion of the input member 34 arranged on the first axial side L1 with respect to the input gear 35 relative to the case 4 (here, the first cover portion 41). The fourth bearing B4 rotatably supports a portion of the input member 34 arranged on the second axial side L2 with respect to the input gear 35 relative to the case 4 (here, the intermediate wall 46).

[0062] The fifth bearing B5 rotatably supports a portion of the counter shaft 23 located on the first axial side L1 relative to the first gear 21 and the second gear 22 relative to the case 4 (here, the first cover part 41). The sixth bearing B6 rotatably supports a portion of the counter shaft 23 located on the second axial side L2 relative to the first gear 21 and the second gear 22 relative to the case 4 (here, the intermediate wall 46).

[0063] The seventh bearing B7 rotatably supports the case 4 (here, the first cover portion 41) a portion of the differential gear case 26 that is located on the first axial side L1 with respect to the pinion shaft 27. The eighth bearing B8 rotatably supports the case 4 (here, the intermediate wall 46) a portion of the differential gear case 26 that is located on the second axial side L2 with respect to the pinion shaft 27. The ninth bearing B9 rotatably supports the end of the connecting shaft 33 on the second axial side L2 with respect to the case 4 (here, the second cover portion 42).

[0064] [Oil Reservoir] The first housing chamber R1 contains oil for cooling and lubricating the rotating electric machine 1 and the power transmission mechanism 2. The oil supplied to heat-generating components such as the stator 14 cools the heat-generating components, and the oil supplied to lubrication-required components such as gears and bearings lubricates the lubrication-required components. The oil is stored in an oil reservoir OR (see FIG. 25 ) formed in the lower part of the first housing chamber R1 (in this embodiment, the portion on the second side Y2 in the second direction). The oil stored in the oil reservoir OR is supplied to the heat-generating components, lubrication-required components, and other oil-required components, and then returned to the oil reservoir OR. In this embodiment, this oil circulation is achieved by both the drive of an electric oil pump OP (described later) and the upward movement of oil by rotating members such as gears. In this embodiment, the vehicle drive device 100 does not include a mechanical oil pump driven by power (e.g., the driving force of the rotating electric machine 1) transmitted through the power transmission path between the rotating electric machine 1 and the output member (31, 32).

[0065] 13 and 21, a second communication port H2 that communicates the rotating electric machine accommodating chamber R1a and the transmission mechanism accommodating chamber R1b is formed in the intermediate wall 46, and oil can flow between the rotating electric machine accommodating chamber R1a and the transmission mechanism accommodating chamber R1b via this second communication port H2. In the simplified diagram shown in Fig. 25, the bottom of the rotating electric machine accommodating chamber R1a (in this embodiment, the end on the second side Y2 in the second direction) is located at the same height as the bottom of the transmission mechanism accommodating chamber R1b, but as is clear from a comparison of Figs. 21 and 22, in this embodiment, the bottom of the rotating electric machine accommodating chamber R1a is located above the bottom of the transmission mechanism accommodating chamber R1b (in this embodiment, the first side Y1 in the second direction). The second communication port H2 is formed to open at or near the bottom of the rotating electric machine accommodation chamber R1a so that the oil returns to the transmission mechanism accommodation chamber R1b via the second communication port H2 after cooling the rotating electric machine 1. As will be described later, in this embodiment, the electric oil pump OP is configured to suck up oil stored in the lower part of the transmission mechanism accommodation chamber R1b, but by locating the bottom of the rotating electric machine accommodation chamber R1a above the bottom of the transmission mechanism accommodation chamber R1b as described above, it is possible to reduce the amount of oil accommodated in the case 4 while suppressing the occurrence of air suction.

[0066] The oil stored in the oil reservoir OR is scooped up by the differential input gear 25 arranged on the third axis A3. In this embodiment, the oil stored in the oil reservoir OR is also scooped up by the first gear 21 arranged on the second axis A2. As described above, in this embodiment, the second axis A2 is arranged below the third axis A3 (in this embodiment, on the second side Y2 in the second direction). This ensures an appropriate amount of oil scooped up by the first gear 21.

[0067] The vehicle drive device 100 includes a second temperature sensor S2 that detects the temperature of oil in the case 4. The second temperature sensor S2 is provided, for example, to detect the temperature of oil stored in the oil reservoir OR, or to detect the temperature of oil flowing through an oil passage formed in the case 4. In the present embodiment, the second temperature sensor S2 is disposed in the rotating electric machine accommodation chamber R1a. The second temperature sensor S2 detects the temperature of oil in a lower portion of the rotating electric machine accommodation chamber R1a (e.g., oil stored in the lower portion of the rotating electric machine accommodation chamber R1a or oil flowing through the lower portion of the rotating electric machine accommodation chamber R1a). The control device 52 controls, for example, an electric oil pump OP (described later) or the amount of coolant flowing into an oil cooler OC (described later) based on the oil temperature detected by the second temperature sensor S2.

[0068] [Catch Tank] As shown in FIGS. 11 , 17 , and 25 , the vehicle drive device 100 includes a catch tank CT that stores oil scooped up by at least one of the gears included in the power transmission mechanism 2. The catch tank CT is formed in the first storage chamber R1 (specifically, the transmission mechanism storage chamber R1b). The catch tank CT temporarily stores oil, and the oil stored in the catch tank CT is supplied to oil supply destinations, such as lubrication destinations. In this embodiment, the catch tank CT is configured to store oil scooped up by the differential input gear 25. The catch tank CT is located above the oil storage portion OR. By providing the catch tank CT, the oil level in the oil storage portion OR can be lowered, thereby reducing the agitation resistance of the oil caused by rotating members, such as gears.

[0069] [Breather Mechanism] The vehicle drive device 100 includes a breather mechanism 9. The breather mechanism 9 is a device for reducing the pressure difference between the inside and outside of the case 4 by connecting the inside and outside of the case 4. As shown in FIGS. 17 to 19 and 22 , the breather mechanism 9 includes a breather chamber 90. The breather chamber 90 is surrounded by a partition wall 95. The breather chamber 90 is formed in the first housing chamber R1 (in this embodiment, the transmission mechanism housing chamber R1b). A shielding wall 94 is provided below the breather chamber 90 (in this embodiment, on the second side Y2 in the second direction) to prevent oil in the case 4 (e.g., oil scooped up by a gear) from entering the breather chamber 90.

[0070] In the present embodiment, the breather chamber 90 is formed across the case main body 40 and the first cover portion 41. Specifically, although not shown, a portion of the breather chamber 90 on the first axial side L1 is formed by a partition wall 95 formed on the first cover portion 41 so as to open toward the second axial side L2. Furthermore, as shown in FIGS. 11 and 17 , a portion of the breather chamber 90 on the second axial side L2 is formed by the partition wall 95 formed on the case main body 40 so as to open toward the first axial side L1. The end face of the partition wall 95 formed on the first cover portion 41 on the second axial side L2 and the end face of the partition wall 95 formed on the case main body 40 on the first axial side L1 (the end face of the partition wall 95 on the near side of the paper in FIGS. 18 and 22 ) are in surface contact with each other, thereby forming the breather chamber 90 across the case main body 40 and the first cover portion 41.

[0071] As described above, in this embodiment, the breather chamber 90 is sealed not by closing the opening of the breather chamber 90 with a lid, but by bringing the partition wall 95 formed in the case main body 40 and the partition wall 95 formed in the first cover part 41 into surface contact (here, metal contact) at their mating surfaces. In this embodiment, not only the wall that partitions the breather chamber 90 but also the shielding wall 94 and the wall that partitions the catch tank CT are formed across the case main body 40 and the first cover part 41 by bringing the wall formed in the case main body 40 and the wall formed in the first cover part 41 into surface contact (here, metal contact) at their mating surfaces.

[0072] Although not shown, the breather mechanism 9 has a breather hole that communicates between the inside and outside of the case 4. The breather hole is formed to open on the outer surface of the case 4, and a breather plug 93 shown in FIG. 17 is attached to the breather hole from the outside of the case 4. The breather plug 93 is provided to prevent oil from leaking from the breather hole to the outside of the case 4 and to prevent water, foreign matter, etc. from entering the breather hole from the outside of the case 4. In this embodiment, the breather hole is provided on the second side X2 in the first direction with respect to the breather chamber 90, and the case 4 is formed with a hole portion that extends in the first direction X and communicates between the breather chamber 90 and the breather hole.

[0073] As shown in FIGS. 18 , 19 , and 22 , the breather mechanism 9 includes a communication hole 91 that connects the inside and outside of the breather chamber 90, and a drain hole 92 for discharging oil that has flowed into the breather chamber 90. In this embodiment, the communication hole 91 is formed to connect the breather chamber 90 and the rotating electric machine accommodation chamber R1a. In addition, in this embodiment, the drain hole 92 is formed to discharge oil that has flowed into the breather chamber 90 to the rotating electric machine accommodation chamber R1a. As shown in FIGS. 18 and 22 , the drain hole 92 opens into the breather chamber 90 below the communication hole 91 (here, on the second side Y2 in the second direction). Furthermore, although not shown, the drain hole 92 opens into the rotating electric machine accommodation chamber R1a below the communication hole 91 (here, on the second side Y2 in the second direction).

[0074] [Electric Oil Pump] The vehicle drive device 100 includes an electric oil pump OP that draws in and discharges oil from the case 4 (specifically, oil stored in the oil reservoir OR). The electric oil pump OP is driven by an electric motor (a dedicated electric motor separate from the rotating electric machine 1). The electric oil pump OP is housed in the first housing chamber R1. In this embodiment, the electric oil pump OP is housed in the transmission mechanism housing chamber R1b. The vehicle drive device 100 includes a strainer ST that filters the oil drawn in by the electric oil pump OP. As shown in FIGS. 22 and 25 , the strainer ST is housed in the transmission mechanism housing chamber R1b, and the electric oil pump OP draws in oil stored in a lower portion of the transmission mechanism housing chamber R1b.

[0075] [Oil Cooler] The vehicle drive system 100 includes an oil cooler OC that exchanges heat between oil and a heat medium (heat exchange medium). In this embodiment, the heat medium is coolant. The oil discharged from the electric oil pump OP is cooled in the oil cooler OC and then supplied to an oil supply destination. As shown in FIG. 5 , the oil cooler OC is provided with a first connection port T1 for introducing coolant into the oil cooler OC and a second connection port T2 for discharging coolant from the oil cooler OC. A piping member (such as a hose) (not shown) is connected to the first connection port T1.

[0076] Although not shown, the inverter module 5 is provided with a cooling water passage for cooling the inverter module 5. The outer surface of the case 4 (specifically, the case main body 40) is provided with a second connection port T2 for introducing cooling water into the cooling water passage and a second connection port T3 for discharging cooling water from the cooling water passage. In this embodiment, as shown in FIGS. 8 and 9 , the second connection port T2 is disposed on the outer surface of the case 4 (specifically, the portion forming the second housing chamber R2) on the second side X2 in the first direction. A piping member (such as a hose) (not shown) is connected to the second connection port T2. For example, the first connection port T1 and the second connection port T2 may be connected by a piping member so that the cooling water after cooling the inverter module 5 is supplied to the oil cooler OC.

[0077] As shown in Fig. 5 , in this embodiment, the oil cooler OC is attached to the outer surface of the case 4. Here, the oil cooler OC is attached to the outer surface of the case 4 (specifically, the case main body 40) on the first side X1 in the first direction. As described above, in this embodiment, the parking actuator 80 is also attached to the outer surface of the case 4 on the first side X1 in the first direction. That is, in this embodiment, the oil cooler OC and the parking actuator 80 are disposed on the outer surface of the same side of the case 4. Also, in this embodiment, as shown in Figs. 6 , 8 , and 17 , the oil cooler OC and the parking actuator 80 are disposed so as to overlap each other when viewed in the axial direction.

[0078] [Oil Flow] Oil discharged from the electric oil pump OP and oil scooped up by rotating members such as gears are supplied to oil supply destinations via oil passages. Note that the term "oil passage" includes both sealed oil passages and open oil passages (e.g., flow paths in which oil flows along a wall surface, etc.). Figure 25 shows the outline of the flow of oil discharged from the electric oil pump OP with solid arrows, and the outline of the flow of oil scooped up by the differential input gear 25 (oil flow passing through the catch tank CT) with hollow arrows. Figure 25 omits the flow of oil that does not pass through the catch tank CT.

[0079] As shown in FIG. 25 , in this embodiment, oil discharged from an electric oil pump OP is supplied to a first oil passage P1 and a second oil passage P2 via an oil cooler OC. The rotating electric machine 1 is cooled by the oil supplied to the first oil passage P1 and the second oil passage P2. In the example shown in FIG. 1 , the first oil passage P1 is formed inside a supply pipe disposed radially outward from the stator 14, and the coil end portions 19 are cooled by oil supplied to the coil end portions 19 from supply holes formed in the supply pipe. In the example shown in FIG. 1 , the second oil passage P2 is formed inside the rotor shaft 12. For example, the rotor core 11 fixed to the rotor shaft 12 is cooled by heat exchange between the oil flowing inside the rotor shaft 12 and the rotor shaft 12. For example, the coil end portions 19 are cooled by oil supplied to the coil end portions 19 from supply holes formed in the rotor shaft 12.

[0080] 25 , in this embodiment, oil in the catch tank CT is supplied to the first bearing B1, the second bearing B2, the third bearing B3, the fourth bearing B4, the fifth bearing B5, the sixth bearing B6, and the ninth bearing B9. Oil scooped up by the differential input gear 25 is supplied to the seventh bearing B7 and the eighth bearing B8 without passing through the catch tank CT. The oil scooped up by the differential input gear 25 lubricates the tooth surfaces of the differential input gear 25 and the second gear 22 that meshes with the differential input gear 25, and the oil scooped up by the first gear 21 lubricates the tooth surfaces of the first gear 21 and the input gear 35 that meshes with the first gear 21.

[0081] 23 , the vehicle drive device 100 includes a terminal block 63 for electrically connecting the rotating electric machine 1 and the inverter module 5. As shown in FIG. 1 , the terminal block 63 is attached to the partition wall 45 so as to cover a through hole formed in the partition wall 45. In the present embodiment, the partition wall 45 includes a portion that separates the first accommodation chamber R1 and the second accommodation chamber R2 in the axial direction L, and a through hole to which the terminal block 63 is attached is formed in this portion.

[0082] As shown in Fig. 15 , a power line bus bar 61 is connected to the coil 18 of the rotating electric machine 1. The power line bus bar 61 is connected to the lead wire drawn out from the coil end portion 19. Also, as shown in Fig. 1 , an output bus bar 60 is connected to the inverter circuit 50 of the inverter module 5. The output bus bar 60 is connected to the above-mentioned midpoint of each arm included in the inverter circuit 50. In this embodiment, three power line bus bars 61, three output bus bars 60, and three relay bus bars 62 (described later) are provided corresponding to the three phases of U, V, and W.

[0083] As shown in Fig. 23 , the power line bus bar 61 and the output bus bar 60 are electrically connected via a relay bus bar 62 provided on a terminal block 63. Specifically, as shown in Fig. 15 , the end of the power line bus bar 61 opposite to the side connected to the coil 18 is connected to one end of the relay bus bar 62 (see Fig. 16 ) in the first housing chamber R1. Here, the power line bus bar 61 is fixed to the relay bus bar 62 with a bolt 65. Furthermore, as shown in Fig. 1 , the end of the output bus bar 60 opposite to the side connected to the inverter circuit 50 is connected to the other end of the relay bus bar 62 (see Fig. 20 ) in the second housing chamber R2.

[0084] 1 and 20 , in this embodiment, the vehicle drive device 100 includes a magnetic core 64. The magnetic core 64 is a core formed of a magnetic material, and for example, a ferrite core (ferrite core) can be used as the magnetic core 64. As shown in FIG. 1 , in this embodiment, the magnetic core 64 is arranged in the second housing chamber R2 so as to surround the relay bus bars 62 (here, three relay bus bars 62). Here, as shown in FIG. 20 , the magnetic core 64 is arranged in the second housing chamber R2 while being held in a case such as a resin case.

[0085] When high-frequency noise generated in the inverter module 5 is transmitted to the power transmission mechanism 2, the drive shafts (DS1, DS2) and the like may act as antennas, causing the high-frequency noise to be radiated to the outside. By providing the magnetic core 64 as described above, it is possible to make it difficult for the high-frequency noise generated in the inverter module 5 to be transmitted to the power transmission mechanism 2, and as a result, it is possible to make it difficult for the high-frequency noise to be radiated to the outside.

[0086] [Wiring and Connectors] In this embodiment, the electric oil pump OP is controlled by the control device 52 provided in the inverter module 5. Therefore, as shown in FIG. 23 , a control signal line 73 that supplies a control signal to the electric oil pump OP is provided to connect the inverter module 5 and the electric oil pump OP. Note that FIG. 23 schematically shows each wire, such as the control signal line 73, and one wire may be a collection of multiple wires. For example, in this embodiment, as shown in FIG. 24 , there are two control signal lines 73, but in FIG. 23 , the control signal line 73 is represented by a single wire.

[0087] In the present embodiment, the detection signals of the first temperature sensor S1, the second temperature sensor S2, and the rotation sensor S3 are output to the control device 52 provided in the inverter module 5. Therefore, as shown in Fig. 23 , a first temperature signal line 71 that outputs the detection signal of the first temperature sensor S1 is provided to connect the inverter module 5 and the first temperature sensor S1, a second temperature signal line 72 that outputs the detection signal of the second temperature sensor S2 is provided to connect the inverter module 5 and the second temperature sensor S2, and a rotation signal line 70 that outputs the detection signal of the rotation sensor S3 is provided to connect the inverter module 5 and the rotation sensor S3. In the present embodiment, the first temperature signal line 71 and the second temperature signal line 72 each correspond to a "temperature signal line."

[0088] 23 , the electric oil pump OP, first temperature sensor S1, second temperature sensor S2, and rotation sensor S3 are housed in the first housing chamber R1. Meanwhile, the inverter module 5 including the control device 52 is housed in the second housing chamber R2. Therefore, the rotation signal line 70, first temperature signal line 71, second temperature signal line 72, and control signal line 73 are arranged between the first housing chamber R1 and the second housing chamber R2. In addition, the power supply line 74 that supplies operating power to the electric oil pump OP is also arranged between the first housing chamber R1 and the second housing chamber R2.

[0089] As described above, in this embodiment, the first housing chamber R1 houses the rotation sensor S3 and the temperature sensor. The temperature sensor includes at least one of the first temperature sensor S1 and the second temperature sensor S2. In this embodiment, the temperature sensor includes both the first temperature sensor S1 and the second temperature sensor S2. Therefore, the first housing chamber R1 houses the rotation sensor S3, the first temperature sensor S1, and the second temperature sensor S2.

[0090] The first accommodation chamber R1 and the second accommodation chamber R2 are separated by a partition wall 45. A first connector CN1 is provided in the partition wall 45 (see FIGS. 13, 21, and 23). In this embodiment, the first connector CN1 is disposed in a portion of the partition wall 45 that separates the rotating electric machine accommodation chamber R1a and the second accommodation chamber R2. The first connector CN1 is provided in a through hole formed in the partition wall 45. The first connector CN1 and each connector described below are members for making electrical connections. In this embodiment, the first connector CN1 corresponds to a "connector."

[0091] As shown in FIG. 23 , the control signal line 73 and the power supply line 74 are arranged to pass through a common connector, the first connector CN1. In this embodiment, the rotation signal line 70 and the temperature signal line are also arranged to pass through the first connector CN1. The temperature signal line includes at least one of the first temperature signal line 71 and the second temperature signal line 72. In this embodiment, the temperature signal line includes both the first temperature signal line 71 and the second temperature signal line 72. Therefore, the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 are arranged to pass through the first connector CN1. Note that any two or more of the multiple wirings (specifically, the rotation signal line 70, the first temperature signal line 71, the second temperature signal line 72, the control signal line 73, and the power supply line 74) may be arranged together in a single cable. In the example shown in FIGS. 21 and 22 , the control signal line 73 and the power supply line 74 are arranged together in a single cable in the first storage chamber R1. On the other hand, in the example shown in FIG. 21, the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 are provided as separate cables.

[0092] Each of the multiple wirings arranged to pass through the first connector CN1 includes a first wiring portion arranged in the first housing chamber R1 and a second wiring portion arranged in the second housing chamber R2. In this embodiment, the first connector CN1 is a relay connector. A connector connected to one end of each of the multiple wirings' first wiring portions and a connector connected to one end of each of the multiple wirings' second wiring portions are connected to the first connector CN1, thereby connecting the first wiring portion and the second wiring portion of each of the multiple wirings via the first connector CN1. Alternatively, a configuration in which a connector connected to one end of each of the multiple wirings' first wiring portions and a connector connected to one end of each of the multiple wirings' second wiring portions may be directly connected (i.e., without an intermediate connector). In this case, the connector connected to one end of each of the multiple wirings' first wiring portions or the connector connected to one end of each of the multiple wirings' second wiring portions is referred to as the first connector CN1.

[0093] In this embodiment, the vehicle drive device 100 includes, in addition to the first connector CN1, a second connector CN2, a third connector CN3, a fourth connector CN4, a fifth connector CN5, a sixth connector CN6, and a seventh connector CN7.

[0094] The second connector CN2 is provided with power supply connection terminals for the inverter circuit 50. In the example shown in FIG. 6 , the power supply connection terminals provided in the second connector CN2 are formed at the ends of bus bars (specifically, positive and negative bus bars) connected to the DC side of the inverter circuit 50. A power supply line that supplies DC power to the inverter circuit 50 is connected to the second connector CN2 from outside the case 4. This DC power is supplied from a DC power supply BT. Although not shown, a connector for a cable including the power supply line is connected to the second connector CN2 from outside the case 4. Note that the second connector CN2 is omitted from FIG. 23 .

[0095] A power supply line that supplies operating power to the control device 52 and a signal line that supplies control signals to the control device 52 are connected to the third connector CN3 from outside the case 4. The operating power of the control device 52 is supplied, for example, from a DC power supply having a lower rated voltage than the DC power supply BT. The control signals for the control device 52 are supplied, for example, from the above-mentioned vehicle control device. Although not shown in the figure, connectors of cables including the above-mentioned power supply lines and signal lines are connected to the third connector CN3 from outside the case 4.

[0096] In the present embodiment, like the operating power of the control device 52, the operating power of the electric oil pump OP is also supplied from outside the case 4 via the third connector CN3. Therefore, a power supply line that supplies operating power to the electric oil pump OP is connected to the third connector CN3 from outside the case 4. The operating power of the electric oil pump OP is supplied, for example, from a DC power supply having a lower rated voltage than the DC power supply BT. When operating power is supplied to both the control device 52 and the electric oil pump OP from a common DC power supply, a configuration can also be adopted in which the power supply line that supplies operating power to both the control device 52 and the electric oil pump OP is connected to the third connector CN3 from outside the case 4.

[0097] As described above, in the present embodiment, operating power for the electric oil pump OP is supplied from outside the case 4 via the third connector CN3, and therefore the power supply line 74 that supplies operating power to the electric oil pump OP is provided to connect the third connector CN3 to the electric oil pump OP. Here, the power supply line 74 connects the third connector CN3 to the electric oil pump OP without passing through the inverter module 5. By configuring the electric oil pump OP to be supplied with operating power from outside the case 4 via the third connector CN3 in this manner, the power supply line 74 that supplies operating power to the electric oil pump OP can be drawn from the first housing chamber R1 through the second housing chamber R2 to the outside of the case 4 without providing a connector separate from the first connector CN1 and the third connector CN3. As a result, costs can be reduced compared to when a dedicated connector is provided for drawing the power supply line 74 to the outside of the case 4.

[0098] The second connector CN2 relays power at a higher voltage than the third connector CN3. In this embodiment, the second connector CN2, which is a high-voltage connector, and the third connector CN3, which is a low-voltage connector, are arranged on different outer surfaces of the case 4 (specifically, the portion forming the second housing chamber R2). Here, as shown in FIGS. 6 and 12 , the second connector CN2 is arranged on the outer surface of the case 4 on the second axial side L2, and as shown in FIG. 5 , the third connector CN3 is arranged on the outer surface of the case 4 on the first side X1 in the first direction.

[0099] 23 , the portion of the power line 74 that is located in the second housing chamber R2 is arranged to pass through the fourth connector CN4. That is, the power line 74 has a portion that connects the first connector CN1 and the fourth connector CN4 and a portion that connects the third connector CN3 and the fourth connector CN4, and these two portions are connected to each other at the fourth connector CN4. That is, the fourth connector CN4 is composed of two connectors that are connected to these two portions, respectively. Alternatively, the fourth connector CN4 may not be provided, and the portion of the power line 74 that is located in the second housing chamber R2 may be composed of a continuous power line without a connector-connected portion.

[0100] 22 and 23, the fifth connector CN5 is connected to one end (the end opposite to the end connected to the first connector CN1) of the portion of the control signal line 73 and the power supply line 74 that is disposed in the first housing chamber R1. Although not shown, the electric oil pump OP is provided with a connector for inputting the control signal and operating power, and the fifth connector CN5 is connected to this connector.

[0101] In this embodiment, the electric oil pump OP is housed in the transmission mechanism accommodation chamber R1b, and the first temperature sensor S1, the second temperature sensor S2, and the rotation sensor S3 are housed in the rotating electric machine accommodation chamber R1a. The first connector CN1 is disposed in a portion of the partition wall 45 that separates the rotating electric machine accommodation chamber R1a from the second accommodation chamber R2. Therefore, in this embodiment, as shown in FIGS. 21 to 23 , a first communication port H1 that communicates between the rotating electric machine accommodation chamber R1a and the transmission mechanism accommodation chamber R1b is formed in the intermediate wall 46 that separates the rotating electric machine accommodation chamber R1a from the transmission mechanism accommodation chamber R1b, and the portions of the control signal line 73 and the power supply line 74 that are disposed in the first accommodation chamber R1 are arranged to pass through the first communication port H1 formed in the intermediate wall 46.

[0102] 15, 16, and 23, in this embodiment, a sixth connector CN6 and a seventh connector CN7 are provided in the portion of the first temperature signal line 71 that is disposed in the first housing chamber R1. Specifically, the portion of the first temperature signal line 71 that is disposed in the first housing chamber R1 includes a first portion having one end connected to the first connector CN1 and a second portion having one end connected to the first temperature sensor S1. The sixth connector CN6 is connected to the other end of the first portion, and the seventh connector CN7 is connected to the other end of the second portion, and these are connected to each other. Note that the second portion of the first temperature signal line 71 is omitted from FIG. 21.

[0103] 21 and 22 , the rotation signal line 70, the first temperature signal line 71 (specifically, the first portion), the second temperature signal line 72, the control signal line 73, and the power supply line 74 are fixed to the intermediate wall 46 in the first housing chamber R1. Specifically, as shown in Fig. 22 , the portions of the control signal line 73 and the power supply line 74 that are arranged in the transmission mechanism housing chamber R1b are fixed to the intermediate wall 46 by a first fixing member F1. Here, the first fixing member F1 is arranged to cover the control signal line 73 and the power supply line 74 from the first axial side L1.

[0104] 21 , the rotation signal line 70 is fixed to the intermediate wall 46 by the second fixing member F2, the first temperature signal line 71, the control signal line 73, and the power supply line 74 are fixed to the intermediate wall 46 by the second fixing member F2 and the third fixing member F3, and the second temperature signal line 72 is fixed to the intermediate wall 46 by the second fixing member F2 and the fifth fixing member F5. The sixth connector CN6 is fixed to the intermediate wall 46 by the fourth fixing member F4. The second temperature sensor S2 is disposed spaced apart from the intermediate wall 46 on the second axial side L2, and as shown in FIG. 14 , the second temperature sensor S2 is fixed to a portion of the case 4 (specifically, the case main body 40) closer to the second axial side L2 than the intermediate wall 46 by the sixth fixing member F6 (see FIGS. 12 and 21 ).

[0105] As described above, in this embodiment, in addition to the control signal line 73 and the power supply line 74, the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 are also arranged to pass through the first connector CN1. In this embodiment, as shown in Fig. 24 , the rotation signal line 70 is arranged on the opposite side of the first connector CN1 from the power supply line 74, with at least one of the control signal line 73 and the temperature signal line (71, 72) sandwiched between them. Note that Fig. 24 shows the arrangement of terminals (pin arrangement) of each line in the first connector CN1 when viewed in a direction along the insertion / removal direction of the first connector CN1 and another connector connected to the first connector CN1.

[0106] 24 , in this embodiment, there are six rotation signal wires 70, two first temperature signal wires 71, two second temperature signal wires 72, two control signal wires 73, and two power supply wires 74. In this embodiment, the rotation sensor S3 is a resolver, and the six rotation signal wires 70 include two rotation signal wires 70 connected to the excitation coil and four rotation signal wires 70 connected to the two detection coils. In addition, the two power supply wires 74 include one power supply wire 74 connected to the positive pole (+B) of the power supply and one power supply wire 74 connected to the negative pole (GND) of the power supply.

[0107] Here, two mutually orthogonal directions (specifically, two mutually orthogonal directions in a plane orthogonal to the insertion / removal direction) are referred to as the "first arrangement direction" and the "second arrangement direction." Here, the left-right direction in FIG. 24 is referred to as the first arrangement direction, and the up-down direction in FIG. 24 is referred to as the second arrangement direction. A total of six signal lines, including two first temperature signal lines 71, two second temperature signal lines 72, and two control signal lines 73, are arranged in the first arrangement direction in the first connector CN1. Hereinafter, this group of six signal lines will be referred to as the "target signal line group." Note that the arrangement order of the signal lines in the first arrangement direction in the target signal line group in FIG. 24 is merely an example, and this arrangement order can be changed as appropriate.

[0108] In the first connector CN1, two power supply lines 74 are arranged side by side in the first arrangement direction on one side (upper side in FIG. 24) of the target signal line group (71 to 73) in the second arrangement direction, and six rotational signal lines 70 are arranged side by side in the first arrangement direction on the other side (lower side in FIG. 24) of the target signal line group (71 to 73) in the second arrangement direction. As a result, in the first connector CN1, each of the six rotational signal lines 70 is arranged on the opposite side of the power supply line 74, with at least one of the control signal line 73, the first temperature signal line 71, and the second temperature signal line 72 sandwiched between them.

[0109] Other Embodiments (1) In the above embodiment, a configuration has been described as an example in which the rotation signal line 70 is arranged on the opposite side of the first connector CN1 from the power supply line 74, with at least one of the control signal line 73 and the temperature signal line (71, 72) sandwiched between them. However, the present disclosure is not limited to such a configuration, and a configuration in which neither the control signal line 73 nor the temperature signal line (71, 72) is arranged between the rotation signal line 70 and the power supply line 74 is also possible, for example, in cases where the influence of the power supply line 74 on the rotation signal line 70 is within an allowable range.

[0110] (2) In the above embodiment, a configuration has been described as an example in which the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 are arranged to pass through the first connector CN1 in addition to the control signal line 73 and the power supply line 74. However, the present disclosure is not limited to such a configuration, and a configuration in which at least one of the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 is arranged not to pass through the first connector CN1 may also be used. For example, a configuration in which at least one of the rotation signal line 70, the first temperature signal line 71, and the second temperature signal line 72 is arranged to pass through a connector provided on the partition wall 45 separately from the first connector CN1 may also be used.

[0111] (3) Note that the configurations disclosed in the above-described embodiments can be applied in combination with configurations disclosed in other embodiments (including combinations of embodiments described as other embodiments) as long as no contradictions arise. Regarding 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.

[0112] Summary of the Present Embodiment The above-described embodiment of the vehicle drive device will be summarized below.

[0113] The vehicle drive device (100) includes a rotating electric machine (1), output members (31, 32) drivingly connected to wheels (W1, W2), a power transmission mechanism (2) that transmits driving force between the rotating electric machine (1) and the output members (31, 32), an inverter module (5) for driving and controlling the rotating electric machine (1), and a case (4), and the case (4) includes a first housing chamber (R1) that houses the rotating electric machine (1) and the power transmission mechanism (2), and a case (4) that houses the inverter module (5). The case (4) includes a second storage chamber (R2) that stores oil (5), and a partition wall (45) that separates the first storage chamber (R1) and the second storage chamber (R2). The first storage chamber (R1) stores an electric oil pump (OP) that sucks in and discharges oil from the case (4). A control signal line (73) that supplies a control signal to the electric oil pump (OP) and a power supply line (74) that supplies operating power to the electric oil pump (OP) are arranged to pass through a common connector (CN1) provided on the partition wall (45).

[0114] According to this configuration, the power supply line (74) that supplies operating power to the electric oil pump (OP) can be drawn from the first housing chamber (R1) in which the electric oil pump (OP) is housed to the second housing chamber (R2) in the same manner as the control signal line (73) without providing a connector separate from the connector (CN1) through which the control signal line (73) that supplies a control signal to the electric oil pump (OP) passes. Therefore, compared to a case in which a dedicated connector is provided for drawing the power supply line (74) from the first housing chamber (R1) to the second housing chamber (R2), the power supply line (74) can be arranged while suppressing an increase in the cost of the entire device. As described above, according to this configuration, the power supply line (74) that supplies operating power to the electric oil pump (OP) housed in the case (4) can be arranged while suppressing an increase in the cost of the entire device.

[0115] Here, it is preferable that the first accommodation chamber (R1) further accommodates a rotation sensor (S3) that detects the rotation of the rotor (10) of the rotating electric machine (1), and temperature sensors (S1, S2) including at least one of a sensor (S1) that detects the temperature of the stator (14) of the rotating electric machine (1) and a sensor (S2) that detects the temperature of the oil, and that a rotation signal line (70) that outputs a detection signal of the rotation sensor (S3) and temperature signal lines (71, 72) that output detection signals of the temperature sensors (S1, S2) are arranged to pass through the connector (CN1), and that the rotation signal line (70) is arranged on the opposite side of the power supply line (74) in the connector (CN1), with at least one of the control signal line (73) and the temperature signal line (71, 72) sandwiched between them.

[0116] According to this configuration, in addition to the power supply line (74), the rotation signal line (70) and the temperature signal line (71, 72) can be aggregated in the connector (CN1) through which the control signal line (73) is passed, and these signal lines (70, 71, 72) can be drawn from the first storage chamber (R1) to the second storage chamber (R2). Therefore, the cost of the entire device can be reduced more easily than when a dedicated connector is provided for drawing the rotation signal line (70) and the temperature signal line (71, 72) from the first storage chamber (R1) to the second storage chamber (R2). Furthermore, according to this configuration, in the connector (CN1) in which multiple lines are aggregated in this manner, the rotation signal line (70) is arranged on the opposite side of the power supply line (74), with at least one of the control signal line (73) and the temperature signal line (71, 72) sandwiched therebetween. Therefore, the rotation signal line (70) through which the detection signal of the rotation sensor (S3), which is generally a signal that is easily affected by noise, flows can be positioned away from the power supply line (74), which can be a source of noise, and as a result, it becomes easier to ensure appropriate detection accuracy of the rotation of the rotor (10) by the rotation sensor (S3).

[0117] It is sufficient for the vehicle drive device according to the present disclosure to achieve at least one of the above-described effects.

[0118] 1: rotating electric machine, 2: power transmission mechanism, 4: case, 5: inverter module, 10: rotor, 14: stator, 31: first output member (output member), 32: second output member (output member), 45: partition wall, 70: rotation signal line, 71: first temperature signal line (temperature signal line), 72: second temperature signal line (temperature signal line), 73: control signal line, 74: power supply line, 100: vehicle drive device, CN1: first connector (connector), OP: electric oil pump, R1: first housing chamber, R2: second housing chamber, S1: first temperature sensor (temperature sensor), S2: second temperature sensor (temperature sensor), S3: rotation sensor, W1: first wheel (wheel), W2: second wheel (wheel)

Claims

1. A vehicle drive device comprising: a rotating electric machine, an output member drivingly connected to wheels, a power transmission mechanism that transmits driving force between the rotating electric machine and the output member, an inverter module for driving and controlling the rotating electric machine, and a case, wherein the case comprises a first accommodation chamber that accommodates the rotating electric machine and the power transmission mechanism, a second accommodation chamber that accommodates the inverter module, and a partition wall that separates the first accommodation chamber from the second accommodation chamber, wherein the first accommodation chamber accommodates an electric oil pump that draws in and discharges oil within the case, and wherein a control signal line that supplies a control signal to the electric oil pump and a power supply line that supplies operating power to the electric oil pump are arranged to pass through a common connector provided on the partition wall.

2. A vehicle drive device as described in claim 1, wherein the first housing further accommodates a rotation sensor that detects the rotation of the rotor of the rotating electric machine, and a temperature sensor including at least one of a sensor that detects the temperature of the stator of the rotating electric machine and a sensor that detects the temperature of the oil, a rotation signal line that outputs a detection signal of the rotation sensor and a temperature signal line that outputs a detection signal of the temperature sensor are arranged to pass through the connector, and in the connector, the rotation signal line is arranged on the opposite side to the power supply line, sandwiching at least one of the control signal line and the temperature signal line.

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