Drive device

The present invention includes an input shaft connected to an engine, a first rotary electric machine, a second rotary electric machine, a first rotary element connected to the first rotary electric machine, and a second rotary element connected to the input shaft. A planetary gear device including a third rotating element as an output rotating element, an output gear connected to the output rotating element, an output shaft for transmitting the rotation of the output gear to a drive wheel, and the first rotation. The present invention relates to a drive device including a control device for controlling an electric machine and the second rotary electric machine.

In recent years, so-called hybrid vehicles equipped with an engine and a rotating electric machine such as a motor or a generator as a driving source of a vehicle have been attracting attention from the viewpoints of fuel efficiency and environmental protection. A drive device for such a hybrid vehicle requires a control device for controlling a rotary electric machine. Since these rotary electric machines and control devices that are operated in combination are connected by a connecting member such as a power cable, it is desirable that they are integrated in one case from the viewpoint of convenience on the vehicle. In such a case, it is common to adopt a configuration in which an inverter case for accommodating a control device is integrally provided on an upper part of a drive device case for accommodating two rotary electric machines, a planetary gear device, and the like.

However, in the above-mentioned configuration of the drive device, since the control device is arranged on the upper part of the drive device case, the dimensions of the drive device as a whole become large in the vertical direction. Therefore, when such a drive device is mounted on a vehicle, these devices are usually arranged above the drive device in order to prevent devices such as a battery and an air cleaner from interfering with the control device. Will need to be moved to another position.

On the other hand, for example, Patent Document 1 below discloses the following configuration of a drive device. This drive unit includes an input shaft connected to an engine, two rotary electric machines, a planetary gear device having three rotating elements connected to one of the rotating electric machines, an input shaft, and an output rotating element, and a rotating electric machine. It is equipped with a control device for controlling the above. Regarding the arrangement of each component included in this drive device, a configuration in which two rotary electric machines, a planetary gear device, and an input shaft are arranged coaxially and a control device is arranged above the drive device is disclosed. Here, since the control device is arranged at a position that overlaps with one of the rotary electric machines in the axial direction, the capacitor and the reactor, which are relatively large components among the control device components, pass through the rotary shaft of the rotary electric machine. By arranging them on opposite sides to the vertical plane, it is possible to efficiently store them in the drive unit case. As a result, the dimensional expansion of the drive device upward is suppressed.

<patcit num="1"><text>JP-A-2007-124764</text></patcit>

<p> However, in a drive device as described in Patent Document 1, since the two rotary electric machines are arranged coaxially, the rotary drive force that can be output by the rotary electric machine while suppressing the dimensional expansion upward of the drive device. In order to increase the size, it is necessary to increase the axial length of the rotary electric machine, and accordingly, the axial dimension of the drive device also increases. That is, in a conventionally known drive device, if an attempt is made to integrate the control device, either the vertical dimension or the axial dimension of the entire drive device will inevitably become large, and the size of the entire drive device will increase. Was the result of inviting.</p><p> The present invention has been made in view of the above problems, and an object of the present invention is to integrate a control device while suppressing an increase in the size of the entire drive device.</p>

<p> In order to achieve this object, an input shaft connected to the engine according to the present invention, a first rotary electric machine, a second rotary electric machine, a first rotary element connected to the first rotary electric machine, and the input shaft. A planetary gear device including a second rotating element connected to and a third rotating element serving as an output rotating element, an output gear connected to the output rotating element, and transmission of the rotation of the output gear to a drive wheel. The characteristic configuration of the drive device including the output shaft and the control device for controlling one or both of the first rotary electric machine and the second rotary electric machine is the output gear, the planetary gear device, and the first rotation. The electric machine is arranged coaxially with the input shaft, the planetary gear device is arranged radially inside the first rotary electric machine in the axial direction with the first rotary electric machine, and the second rotary electric machine is arranged. , The control device is arranged on a shaft different from the input shaft and the output shaft, and the control device is axially connected to the engine connection side of the input shaft with respect to the output gear, the planetary gear device, and the first rotary electric machine. It is located on the opposite side of the.</p><p> In the present application, the term "rotary electric machine" is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator that functions as both a motor and a generator, if necessary. Further, in the present specification, unless otherwise specified, the rotary electric machine is used as a comprehensive concept meaning one or both of the first rotary electric machine and the second rotary electric machine.</p><p> Further, in the present application, "connection" is used as a concept including not only a direct connection between members but also an indirect connection between members via one or more members.</p><p> According to the above feature configuration, the axial length of the second rotary electric machine arranged on a shaft different from the input shaft, and the axially overlapping length of the planetary gear device and the first rotary electric machine. Therefore, the axial length of the area occupied by each component arranged coaxially with the input shaft of the drive device (hereinafter, may be simply referred to as "axial length") can be shortened. Therefore, a space corresponding to the shortened axial length can be created on the side opposite to the engine connection side of the input shaft in the axial direction with respect to the output gear, the planetary gear device, and the first rotary electric machine. .. Then, by arranging the control device in the space, the space created by shortening the axial length can be effectively used, and the control device can be integrated while suppressing the increase in size of the entire drive device. ..</p><p> Here, it is preferable that the control device is arranged at a position that overlaps with the first rotary electric machine in the radial direction.</p><p> Among the output gears, planetary gears, and the first rotary electric machine arranged coaxially with the input shaft, the outer diameter of the first rotary electric machine is generally the largest. Therefore, by shortening the axial length, a space is created at a position overlapping the first rotary electric machine in the radial direction in the axial direction. According to the above configuration, the control device can be appropriately arranged in the space to suppress the increase in size of the entire drive device.</p><p> Further, it is preferable that the control device is arranged at a position that does not overlap with the second rotary electric machine in the radial direction.</p><p> When the axial length of the rotating shaft of the second rotating electric machine is long and the control device overlaps with the second rotating electric machine in the radial direction, the axial length of the entire drive device is increased. According to the above configuration, the control device can be appropriately arranged to effectively utilize the space, and the axial length of the entire drive device can be shortened.</p><p> Further, it is preferable that the control device is arranged at a position overlapping the second rotary electric machine in the axial direction.</p><p> According to this configuration, the axial length of the entire drive device including the control device can be shortened by the length of the control device and the second rotary electric machine overlapping in the axial direction.</p><p> Further, from the engine side, the output gear and the planetary gear device are arranged in this order, and the rotor of the first rotary electric machine is connected to the sun gear of the planetary gear device and has a shaft with respect to the planetary gear device. It is assumed that the input shaft is rotatably supported by the fixing member on the side opposite to the engine connection side of the input shaft, and the sun gear is supported by the input shaft in a state of being rotatable relative to the input shaft. Suitable.</p><p> According to this configuration, since the rotor of the first rotary electric machine is supported by the fixing member on one end side, high accuracy of the rotor axis can be ensured. Further, since the other end side is supported on the input shaft via the sun gear of the planetary gear device connected to the rotor, a bearing having a relatively small diameter is used at a position close to the axis of the input shaft, and the rotor of the first rotary electric machine is used. Can be supported compactly. At this time, by using a bearing having a relatively small diameter, the cost of the bearing can be reduced, and the overall cost of the drive device can be reduced.</p><p> Further, the sun gear includes an extension shaft portion that extends toward the engine in the axial direction of the input shaft, and the extension shaft portion can rotate relative to the input shaft inside the radial direction of the input shaft. It is preferable that the configuration is supported by.</p><p> According to this configuration, the rotor of the first rotary electric machine can be supported at a wide distance on both sides in the axial direction of the planetary gear device. Therefore, the accuracy of the rotor shaft core can be further ensured.</p><p> Further, an intermediate fixing member arranged between the output gear and the planetary gear device in the axial direction is provided, and the input shaft penetrates the output gear and is relatively rotatable inside the output gear in the radial direction. It is supported and connected to the carrier of the planetary gear device, and the output gear is connected to the ring gear of the planetary gear device via a connecting portion on the radial outer side of the input shaft, and is connected to the ring gear of the connecting portion in the radial direction. It is preferable that the structure is rotatably supported by the intermediate fixing member on the outside.</p><p> According to this configuration, since the output gear is supported by the intermediate fixing member on one end side, the axis accuracy of the output gear can be ensured high. Further, since the input shaft is supported on the inner side in the radial direction of the output gear whose shaft core accuracy is highly secured, the shaft core accuracy of the input shaft can be secured relatively high.</p><p> Further, a differential gear device having a differential input gear and transmitting the rotational driving force of the differential input gear to the output shaft is provided, and the first gear that meshes with the output gear and the differential input gear A second gear that meshes with the second gear and a counter shaft that connects the first gear and the second gear are provided, and the counter shaft is different from the input shaft, the output shaft, and the rotation shaft of the second rotary electric machine. It is preferable that the configuration is arranged on the shaft.</p><p> According to this configuration, the rotational driving force of the output gear is changed by appropriately changing the ratio between the diameter and the number of teeth of the first gear that meshes with the output gear and the diameter and the number of teeth of the second gear that meshes with the differential input gear. Can be freely set when transmitting to the output shaft via the differential gear device.</p><p> Further, it is preferable that the output gear of the second rotary electric machine connected to the rotor of the second rotary electric machine is in mesh with the first gear.</p><p> According to this configuration, since the output gear and the output gear of the second rotary electric machine mesh with the first gear in common, the axial length of the counter shaft can be shortened. Therefore, the first rotary electric machine can be arranged closer to the engine side by the amount that the axial length of the counter shaft is shortened. As a result, the axial length can be shortened to create a space for arranging the control device.</p><p> Further, it is preferable that the second gear is arranged closer to the engine than the first gear.</p><p> According to this configuration, the counter shaft can be arranged closer to the engine side, and accordingly, the first rotary electric machine can be arranged closer to the engine side. As a result, the axial length can be shortened to create a space for arranging the control device.</p><p> Further, when the second gear is arranged closer to the engine than the first gear, the oil pump includes an oil pump for generating a hydraulic pressure for supplying lubricating oil to a portion to be lubricated. It is preferable that the configuration is coaxial with the input shaft and arranged on the engine side in the axial direction with respect to the output gear.</p><p> The output gear meshes with the first gear, and the second gear is arranged on the engine side of the first gear, so that the second gear and the axial direction are on the engine side of the output gear in the axial direction of the input shaft. There is an overlapping space in. Therefore, by adopting the above configuration, the oil pump can be arranged by effectively utilizing the space, the entire drive device can be miniaturized, and the lubricating oil can be supplied to the lubrication target portion.</p><p> Further, it is preferable that the differential input gear is arranged on the engine side in the axial direction with respect to the axial center portion of the differential gear device.</p><p> According to this configuration, the second gear that meshes with the differential input gear can be arranged closer to the engine side. Along with this, the counter shaft and the first gear connected to the second gear, the output gear connected to the first gear, and the like can be arranged closer to the engine side. As a result, the axial length can be shortened to create a space for arranging the control device.</p><p> Further, it is preferable that the output shaft and the rotating shaft of the second rotary electric machine are arranged on the same side with respect to the vertical plane passing through the input shaft.</p><p> According to this configuration, in a configuration having three axes of an input shaft, a rotating shaft of a second rotary electric machine, and an output shaft, each shaft can be arranged compactly to suppress an increase in the size of the entire drive device.</p><p> Further, it is preferable that the control device includes an inverter unit that converts DC power and AC power.</p><p> According to this configuration, the inverter unit can appropriately take out electric power from a power storage device such as a battery to drive a rotary electric machine, or store the electric power generated by driving the rotary electric machine in the power storage device.</p>

Hereinafter, embodiments of the drive device according to the present invention will be described with reference to the drawings. In the present embodiment, a case where the drive device according to the present invention is applied to the hybrid drive device 1 for an FF (Front Engine Front Drive) vehicle will be described as an example. FIG. 1 is a developed sectional view of the hybrid drive device 1 according to the present embodiment, and FIG. 2 is a sectional view of a main part of the hybrid drive device 1 according to the present embodiment. FIG. 3 is a side view of the hybrid drive device 1 according to the present embodiment as viewed from the axial direction. FIG. 4 is a schematic view schematically showing the arrangement of the hybrid drive device 1 in the vehicle 7.

1. Overall configuration of hybrid drive unit First, the overall configuration of the hybrid drive device 1 according to the present embodiment will be described. The hybrid drive device 1 is a drive device for a hybrid vehicle that uses both the engine E and the motor generator MG as the drive force source for the vehicle 7. As shown in FIG. 4, the hybrid drive device 1 according to the present embodiment is arranged adjacent to the engine E horizontally placed on the vehicle 7 in the width direction of the vehicle 7, and is the axis of the output shaft Eo of the engine E. Connected in the direction. The rotational driving force (or rotational driving force generated by the motor generator MG) input from the output shaft Eo of the engine E is transmitted to the drive wheels 6 via the output shaft O of the hybrid drive device 1 and is transmitted to the vehicle. 7 can run. In the illustrated example, the output shaft O is arranged behind the output shaft Eo of the engine E (input shaft I of the hybrid drive device 1 (see FIG. 1)) in the front-rear direction of the vehicle 7. The configuration may be arranged in front of the output shaft Eo of the engine E (input shaft I of the hybrid drive device 1).

As shown in FIG. 1, the hybrid drive device 1 includes an input shaft I connected to the engine E, a first motor generator MG1, a second motor generator MG2, a planetary gear device P, and a planetary gear device. Control of the output gear 12 connected to the ring gear r that is the output rotation element of P, the output shaft O that transmits the rotation of the output gear 12 to the drive wheels 6, and the first motor generator MG1 and the second motor generator MG2. 21 and a control device 21 for performing the above. Then, the hybrid drive device 1 controls the rotation of the first motor generator MG1 to steplessly shift the rotational drive force of the input shaft I via the planetary gear device P and transmit it to the output gear 12. It constitutes an electric continuously variable transmission. In the present embodiment, the rotational driving force transmitted to the output gear 12 is transmitted to the output shaft O via the counter reduction mechanism C and the differential device 18, which will be described later. Further, the second motor generator MG2 is configured to be able to transmit a rotational driving force to the output shaft O via the counter reduction mechanism C and the differential device 18. In the present embodiment, the first motor generator MG1 corresponds to the "first rotary electric machine" in the present invention, and the second motor generator MG2 corresponds to the "second rotary electric machine" in the present invention. Further, the differential device 18 corresponds to the "differential gear device" in the present invention.

The input shaft I, the first motor generator MG1, the second motor generator MG2, the planetary gear device P, the output gear 12, the counter reduction mechanism C, the differential device 18, and the output shaft O constituting the hybrid drive device 1 are case 2. It is housed inside. The output gear 12, the planetary gear device P, and the first motor generator MG1 are arranged coaxially with the input shaft I. The second motor generator MG2, the counter reduction mechanism C, and the differential device 18 are arranged parallel to each other on a shaft different from the input shaft I, respectively. That is, in this hybrid drive device 1, the input shaft I, the planetary gear device P, the first shaft A1 on which the first motor generator MG1 and the output gear 12 are arranged, and the second shaft on which the second motor generator MG2 is arranged are arranged. It has a four-axis configuration with A2, a third axis A3 in which the counter reduction mechanism C is arranged, and a fourth axis A4 in which the differential device 18 is arranged.

As shown in FIG. 3, in the front-rear direction of the vehicle 7 (horizontal direction in FIG. 3), the second axis A2, the third axis A3, and the fourth axis A4 are on the same side with respect to the vertical plane passing through the first axis A1. Is located in. Here, the second axis A2, the third axis A3, and the fourth axis A4 are arranged on the rear side of the vehicle 7 with respect to the vertical plane passing through the first axis A1. Further, in the vertical direction of the vehicle 7 (vertical direction in FIG. 3), the second axis A2 and the fourth axis A4 are vertically separated from each other with respect to the horizontal plane passing through the first axis A1. Here, the second axis A2 is arranged above the horizontal plane passing through the first axis A1, and the fourth axis A4 is arranged below the horizontal plane passing through the first axis A1. As a result, the first axis A1, the second axis A2, and the fourth axis A4 are arranged so that the lines connecting these three axes form a triangle. The first motor generator MG1 arranged on the first axis A1, the second motor generator MG2 arranged on the second axis A2, and the differential device 18 arranged on the fourth axis A4 have diameters. They are arranged adjacent to each other in the direction. Further, in the third shaft A3, the first gear 14 of the counter reduction mechanism C meshes with the output gear 12 and the second motor / generator output gear 13, and the second gear 16 is the differential input gear 17 of the differential device 18. It is arranged inside a triangle formed by connecting the three axes of the first axis A1, the second axis A2, and the fourth axis A4 so as to mesh with each other.

2. Drive mechanism configuration Next, the configuration of the drive mechanism included in the hybrid drive device 1 according to the present embodiment will be described. As shown in FIGS. 1 and 2, the input shaft I is connected to the engine output shaft Eo of the engine E on one side in the axial direction (the right side in FIG. 1, the same applies hereinafter). Here, the engine E is an internal combustion engine driven by combustion of fuel, and various known engines such as a gasoline engine and a diesel engine can be used, for example. A damper 11 is inserted between the engine output shaft Eo and the input shaft I of the hybrid drive device 1. The damper 11 transmits the rotation generated by driving the engine E to the input shaft I while absorbing the torsional vibration between the two shafts, and inputs the rotation into the hybrid drive device 1. It should be noted that the input shaft I may be directly connected to the engine E, or may be connected via a structure such as a clutch other than the damper. The input shaft I is connected so as to rotate integrally with the carrier ca of the planetary gear device P.

The first motor generator MG1 has a first stator St1 fixed to the case 2 and a first rotor Ro1 rotatably supported inside the first stator St1 in the radial direction. The first rotor Ro1 of the first motor generator MG1 is connected so as to rotate integrally with the sun gear s of the planetary gear device P. The first motor generator MG1 is electrically connected to a power storage device (not shown) such as a battery or a capacitor via a control device 21. The first motor generator MG1 can function as a motor (electric motor) that receives power supply and generates power, and as a generator (generator) that receives power supply and generates power. It is possible. In this example, the first motor generator MG1 generates electric power mainly by the driving force of the input shaft I (engine E) input via the planetary gear device P, and charges the power storage device, or the second motor. It functions as a generator that supplies power to drive the generator MG2. However, when the vehicle 7 is running at high speed or when the engine is started, the first motor generator MG1 may function as a motor that powers and outputs driving force.

The second motor generator MG2 has a second stator St2 fixed to the case 2 and a second rotor Ro2 rotatably supported inside the second stator St2 in the radial direction. The second rotor Ro2 of the second motor generator MG2 is connected so as to rotate integrally with the second motor generator output gear 13. The second motor / generator output gear 13 is connected to the first gear 14 by meshing with the first gear 14 of the counter reduction mechanism C. In the present embodiment, the second motor / generator output gear 13 corresponds to the "second rotary electric machine output gear" in the present invention. The second motor generator MG2 is electrically connected to a power storage device (not shown) such as a battery or a capacitor via a control device 21. Like the first motor generator MG1, the second motor generator MG2 also functions as a motor (electric motor) that generates power by receiving power supply, and a generator (power generation) that generates power by receiving power supply. It is possible to fulfill the function as a machine). In this example, the second motor generator MG2 mainly functions as a motor that assists the driving force for traveling of the vehicle 7. However, when the vehicle 7 is decelerating, the second motor generator MG2 may function as a generator that regenerates the inertial force of the vehicle 7 as electrical energy.

In this embodiment, the first rotation sensor 61 is arranged adjacent to the first rotor Ro1 of the first motor generator MG1. The first rotation sensor 61 detects the rotation position of the first rotor Ro1. Further, the second rotation sensor 62 is arranged adjacent to the second rotor Ro2 of the second motor generator MG2. The second rotation sensor 62 detects the rotation position of the second rotor Ro2. Specifically, a resolver or the like is used as the first rotation sensor 61 and the second rotation sensor 62.

The planetary gear device P is arranged coaxially with the input shaft I, and includes three rotating elements, a first rotating element, a second rotating element, and a third rotating element. In the present embodiment, the planetary gear device P is a single pinion type planetary gear mechanism having a carrier ca that rotatably supports a plurality of pinion gears, a sun gear s and a ring gear r that mesh with the pinion gears, respectively, as rotating elements. It is composed of. The sun gear s is connected so as to rotate integrally with the first rotor Ro1 of the first motor generator MG1. The carrier ca is connected so as to rotate integrally with the input shaft I. The ring gear r is an output rotating element, and rotates integrally with the output gear 12 provided coaxially with the input shaft I on one side (engine E side) of the ring gear r in the axial direction. In the present embodiment, assuming that the three rotating elements of the planetary gear device P are the first rotating element, the second rotating element, and the third rotating element in the order of rotation speed, the sun gear s is the "first rotating element" in the present invention, respectively. , The carrier ca corresponds to the "second rotating element", and the ring gear r corresponds to the "third rotating element".

The planetary gear device P functions to distribute the rotational driving force of the input shaft I (engine E) to the output gear 12 and the first motor generator MG1. That is, in the planetary gear device P, the carrier ca, which is intermediate in the order of rotation speed, rotates integrally with the input shaft I (engine E). Then, the rotation of the carrier ca is distributed to the sun gear s, which is one end in the order of the rotation speed in the planetary gear device P, and the ring gear r, which is the other end in the order of the rotation speed. The rotation distributed to the ring gear r is transmitted to the output gear 12, and the rotation distributed to the sun gear s is transmitted to the first rotor Ro1 of the first motor generator MG1. At this time, the engine E outputs a positive torque according to the driving force required from the vehicle side while being controlled so as to be maintained in a state of high efficiency and low exhaust gas (generally in line with the optimum fuel consumption characteristics). , This torque is transmitted to the carrier ca via the input shaft I. On the other hand, the first motor generator MG1 transmits the reaction force of the torque of the input shaft I to the sun gear s by outputting the torque in the negative direction. That is, the first motor generator MG1 functions as a reaction force receiver that supports the reaction force of the torque of the input shaft I, whereby the torque of the input shaft I is distributed to the output gear 12. At this time, the rotation speed of the output gear 12 is determined by the rotation speed of the first motor generator MG1. The output gear 12 is connected to the first gear 14 by meshing with the first gear 14 of the counter reduction mechanism C.

As shown in FIG. 1, the counter reduction mechanism C connects the first gear 14 that meshes with the output gear 12, the second gear 16 that meshes with the differential input gear 17, and the first gear 14 and the second gear 16. It is equipped with a counter shaft 15. The rotation axis (third axis A3) of the counter shaft 15 is parallel to the input axis (first axis A1) and is a different axis. Here, the second gear 16 has a smaller diameter and a smaller number of teeth than the first gear 14. As a result, the rotation of the first gear 14 is decelerated on the number of teeth and transmitted to the second gear 16. Further, in the present embodiment, the second gear 16 is arranged on one side (engine E side) in the axial direction with respect to the first gear 14. As a result, the counter shaft 15 can be arranged closer to one side (engine E side) in the axial direction with respect to the output gear 12. Further, the second motor / generator output gear 13 is meshed with the first gear 14. That is, the output gear 12 and the second motor / generator output gear 13 are commonly meshed with the first gear 14. The rotation of the output gear 12 and the rotation of the second motor / generator output gear 13 are transmitted to the first gear 14 and to the differential device 18 via the counter shaft 15 and the second gear 16.

The differential device 18 has a differential input gear 17 that meshes with the second gear 16. The differential device 18 distributes the rotational driving force transmitted to the differential input gear 17 and transmits it to the two drive wheels 6 via the output shaft O. As described above, the rotational driving force of the engine E, the first motor generator MG1 and the second motor generator MG2 is transmitted to the counter reduction mechanism C (second gear 16). Therefore, in the hybrid drive device 1 according to the present embodiment, the rotational drive force generated by the engine E, the first motor generator MG1 and the second motor generator MG2 and transmitted to the differential input gear 17 is applied to the differential drive device 18 It is transmitted to the output shaft O and the two drive wheels 6 via the above, and the vehicle 7 can be driven. Specifically, the vehicle 7 can be switched between a motor drive mode that drives only the second motor generator MG2 and a hybrid drive mode that drives all of the engine E, the first motor generator MG1 and the second motor generator MG2. Can be run.

Further, in the present embodiment, as shown in FIG. 1, the differential input gear 17 is arranged on one side (engine E side) in the axial direction with respect to the central portion 18a of the differential device 18. Here, the differential input gear 17 is arranged closer to one side in the axial direction (engine E side), and the differential device 18 is located on the other side in the axial direction (left side in FIG. 1, the same applies hereinafter) with respect to the differential input gear 17. The central part 18a of is located. With such an arrangement, the second gear 16 that meshes with the differential input gear 17 can be arranged closer to the engine side, and accordingly, the counter shaft 15 and the first gear connected to the second gear 16 can be arranged. 14 and the output gear 12 that meshes with the first gear 14 can be arranged closer to one side in the axial direction (engine E side).

The input shaft I, the first motor generator MG1, the second motor generator MG2, the planetary gear device P, the output gear 12, the counter reduction mechanism C, the differential device 18, and the output shaft O are housed in the case 2. The case 2 includes a case peripheral wall 40 that covers the outer periphery of each housing component housed therein, a first end support wall 41 that closes an opening at the other end of the case peripheral wall 40 in the axial direction, and a shaft of the case peripheral wall 40. It is provided with a second end support wall 43 that closes the end opening on one side in the direction. Here, the first end support wall 41 is arranged on the other side in the axial direction with respect to the first motor generator MG1, and the second end support wall 43 is arranged on one side in the axial direction with respect to the output gear 12. Has been done. Further, the case 2 includes a first intermediate support wall 42 arranged between the output gear 12 in the axial direction and the planetary gear device P. In the present embodiment, the first end support wall 41 and the first intermediate support wall 42 of the case 2 correspond to the "fixing member" and the "intermediate fixing member" in the present invention, respectively.

Further, in the present embodiment, the case 2 includes a main case 2a, a first cover 2b attached to the other side in the axial direction of the main case 2a, and a second cover 2c attached to one side in the axial direction of the main case 2a. It is configured so that it can be divided into and. Here, a case peripheral wall 40 is formed in the main case 2a, and the main case 2a is configured to accommodate the main components of the hybrid drive device 1. Further, in the illustrated example, the first intermediate support wall 42 and the second intermediate support wall 45 are integrally formed with the main case 2a (case 2). Further, the ends of the main case 2a on both sides in the axial direction are openings, and the housing parts to be housed inside the case 2 are housed and assembled from those openings. Here, on the first shaft A1, the input shaft I and the output gear 12 are accommodated and assembled from one side in the axial direction of the main case 2a, and the planetary gear device P and the first from the other side in the axial direction of the main case 2a. The motor generator MG1 is housed and assembled. On the second axis A2, the second motor generator MG2 is housed and assembled from the other side in the axial direction of the main case 2a, and on the third axis A3, the counter deceleration mechanism is accommodated from one side in the axial direction of the main case 2a. C is housed and assembled.

Then, after each of these components is accommodated, the first cover 2b is attached to the other side in the axial direction of the main case 2a, and the second cover 2c is attached to one side in the axial direction of the main case 2a. Here, the first cover 2b is formed with the first end support wall 41, and the second cover 2c is formed with the second end support wall 43. Further, the pump cover 44, which is made of a member different from the second cover 2c (case 2), is brought into contact with the stepped portion provided on the inner peripheral surface of the second cover 2c from the other side in the axial direction. It is installed integrally. A pump chamber is formed between the side surface of the second end support wall 43 on the other side in the axial direction and the pump cover 44 attached so as to face the side surface, and the oil pump 19 is arranged in the pump chamber. It has a structure that has been set.

Here, as is clear from the fact that the second cover 2c is attached after the output gear 12 is accommodated from one side in the axial direction of the main case 2a, the oil pump 19 is located on one side in the axial direction (engine) with respect to the output gear 12. It is configured to be located on the E side). As described above, in the present embodiment, the output gear 12 meshes with the second gear 16 constituting the counter reduction mechanism C, and the second gear 16 is on one side (engine E side) of the first gear 14 in the axial direction. Have been placed. Therefore, on the first shaft A1, a space (dead space) is generated on one side (engine E side) of the output gear 12 in the axial direction at a position overlapping the second gear 16 in the axial direction. Therefore, by arranging the oil pump 19 in the space, the space inside the hybrid drive device 1 is effectively used to suppress the increase in size of the entire device. The first cover 2b and the second cover 2c are attached to the main case 2a, and the pump cover 44 is attached to the second cover 2c by using, for example, a fastening member such as a bolt.

In the present embodiment, the oil pump 19 is an inscribed type gear pump having an inner rotor and an outer rotor. Further, the oil pump 19 is arranged coaxially with the input shaft I, and the inner rotor is connected to the input shaft I by the shaft core portion thereof and is provided so as to rotate integrally with the input shaft I. As the input shaft I rotates, the oil pump 19 discharges lubricating oil to generate oil for supplying lubricating oil to parts to be lubricated such as the planetary gear device P, the output gear, and the counter reduction mechanism C. Axial oil passages and radial oil passages are formed inside the pump cover 44, the input shaft I, the sun gear s, etc., respectively, and the lubricating oil discharged by the oil pump 19 is formed. Is circulated through these oil passages and supplied to each lubrication target site. The lubricating oil discharged by the oil pump 19 is also used for the purpose of cooling the first motor generator MG1 and the second motor generator MG2.

Further, the hybrid drive device 1 includes a control device 21 that controls one or both of the first motor generator MG1 and the second motor generator MG2. In the present embodiment, the control device 21 is configured to control both the first motor generator MG1 and the second motor generator MG2. The control device 21 includes at least an inverter unit (not shown). Here, the inverter unit includes a bridge circuit configured by using at least three sets of six switching elements, and performs conversion between DC power and AC power. In addition to the inverter unit, the control device 21 constitutes, for example, a smoothing capacitor for smoothing the input power supply from the power storage device and supplying it to the inverter unit, and a booster circuit for boosting the input voltage from the power storage device. It may be configured to be provided with a reactor or the like for the purpose. Each component constituting the control device 21 is electrically connected to each other.

As shown in FIG. 2, the control device 21 is fixed to the inside of the control device case 3 arranged adjacent to the case 2. The control device case 3 is attached to the first cover 2b of the case 2, and is attached so as to close the main case 3a containing each component of the control device 21 and the upper openings of the first cover 2b and the main case 3a. It is composed of an upper cover 3b, a first cover 2b, and a lower cover 3c attached so as to close the lower opening of the main case 3a. Further, the control device 21 is electrically connected to the first motor generator MG1 and the second motor generator MG2 via a connecting member 22 that penetrates the first cover 2b in the axial direction. The connecting member 22 is made of a conductive material such as copper, and is a conductor plate in the illustrated example. The space between the first cover 2b and the connecting member 22 is in a liquid-tight state so that the lubricating oil circulating in the case 2 does not get mixed in the control device case 3.

3. Arrangement of each component Next, the arrangement configuration of each component in the hybrid drive device 1, which is a main part of the present invention, will be described. Here, the layout configuration of each component on the first axis A1 and the layout configuration of the control device 21 will be described.

3-1. Arrangement of first axis components As described above, the output gear 12, the planetary gear device P, and the first motor generator MG1 are arranged coaxially with the input shaft I. Each of these components is arranged in the order of the output gear 12, the planetary gear device P, and the first motor generator MG1 from one side in the axial direction (the side connected to the engine E). At this time, the planetary gear device P is arranged inside the first motor generator MG1 in the radial direction so as to overlap with the first motor generator MG1 in the axial direction.

As shown in FIGS. 1 and 2, the first motor generator MG1 is a planetary gear device arranged on the other side in the axial direction with respect to the output gear 12 and also on the other side in the axial direction with respect to the output gear 12. It is arranged on the outer side in the radial direction of P. The first stator St1 of the first motor generator MG1 is fixed in contact with a step portion formed on the inner peripheral surface of the case peripheral wall 40 of the case 2. The first rotor Ro1 is integrally connected to the sun gear s of the planetary gear device P via the first rotor connecting member 31, and is supported by the first rotor connecting member 31 on the radial outer side of the planetary gear device P. ing.

The first rotor connecting member 31 is a member provided so as to extend inward in the radial direction from the first rotor Ro1. In the present embodiment, the first rotor connecting member 31 is arranged along the radial direction and is located at the center in the radial direction. It is a disk-shaped member having a circular hole. The first rotor connecting member 31 is arranged adjacent to the planetary gear device P on the other side in the axial direction (left side in FIG. 1). The first rotor Ro1 is fixed to the radial outer end of the first rotor connecting member 31, and the sun gear s of the planetary gear device P is fixed to the radial inner end. Further, in the present embodiment, the first rotor connecting member 31 integrally includes a cylindrical portion 31a protruding in the axial direction from the disk-shaped member in order to support the inner peripheral surface of the first rotor Ro1. It is said to be in shape. Here, the cylindrical portion 31a is provided so as to project toward the planetary gear device P side, and the inner peripheral surface of the first rotor Ro1 is in contact with the outer peripheral surface thereof.

As described above, by fixing the first rotor Ro1 to the radial outer end of the first rotor connecting member 31, the inner peripheral surface of the first rotor Ro1 (this example) is inside the first rotor Ro1 in the radial direction. Then, a space surrounded by the inner peripheral surface of the cylindrical portion 31a) and the first rotor connecting member 31 is formed. This space is a space that opens on one side in the axial direction, and the entire or part of the planetary gear device P is housed in this space. By arranging the planetary gear device P in the space formed inside the first rotor Ro1 of the first motor generator MG1 in the radial direction in this way, the planetary gear device P and the first motor generator MG1 become the first shaft. Compared with the case where they are arranged side by side on A1, it is possible to shorten the axial length of the first axis A1. In addition, since the outer diameter of the first motor generator MG1 is expanded by arranging the planetary gear device P inside in the radial direction, the axial length required to output the same rotational driving force is long. It's getting shorter. As a result, the axial length of the first axis A1 can be further shortened.

The first rotor Ro1 of the first motor generator MG1 is rotatably supported at two points in the axial direction. In this embodiment, the first rotor Ro1 is supported by the case 2 in one of the two locations and by the input shaft I in the other. Specifically, the first rotor Ro1 is rotatably supported by the first end support wall 41 of the case 2 (first cover 2b) via the first rotor bearing 53 at the support portion on the other side in the axial direction. At the same time, the support portion on one side in the axial direction is supported by the input shaft I in a state of being rotatable relative to the input shaft I via the second rotor bearing 54. In the illustrated example, a ball bearing capable of supporting a relatively large load is used as the first rotor bearing 53. On the other hand, as the second rotor bearing 54, a needle bearing capable of relatively reducing the thickness in the radial direction is used.

In the present embodiment, the first rotor connecting member 31 is axially oriented from the disk-shaped member in order to support the first rotor connecting member 31 and the first rotor Ro1 on the case 2 (first cover 2b). The shape is such that a protruding cylindrical axially protruding portion 31b is integrally provided. Here, the axially projecting portion 31b is provided so as to project to the opposite side (right side in FIG. 1) from the planetary gear device P. Further, the first end support wall 41 has a shape provided with a cylindrical axially projecting portion 41a projecting toward the first motor generator MG1 in the axial direction. A first rotor bearing 53 is provided on the outer peripheral surface of the axially protruding portion 41a of the first end support wall 41 so as to support the inner peripheral surface of the axially protruding portion 31b of the first rotor connecting member 31. There is. In this way, the first rotor Ro1 has the first rotor connecting member 31, the inner peripheral surface of the axially protruding portion 31b of the first rotor connecting member 31, and the axially protruding portion 41a of the first end support wall 41. It is rotatably supported by the first end support wall 41 of the case 2 (first cover 2b) via the first rotor bearing 53 provided between the outer peripheral surface of the case 2. As a result, it is possible to ensure high shaft core accuracy of the first rotor Ro1 at the support portion on the other end side in the axial direction.

Further, in the present embodiment, the rotor of the first rotation sensor 61 is fixed to the outer peripheral surface of the axially protruding portion 31b of the first rotor connecting member 31, and the first end portion of the case 2 (first cover 2b) is supported. The stator of the first rotation sensor 61 is fixed to the surface of the wall 41 on the side of the first motor generator MG1. Here, the axially protruding portion 31b of the first rotor connecting member 31 is vertically overlapped with the axially protruding portion 41a of the first rotor bearing 53 and the first end support wall 41. Therefore, in this example, the first rotation sensor 61 is also arranged so as to overlap with them in the axial direction. Further, the first rotor bearing 53, the axial protrusion 41a of the first end support wall 41, the axial protrusion 31b of the first rotor connecting member 31, and the first rotor are arranged so as to overlap each other in the axial direction. The rotation sensor 61 is arranged so as to overlap with the first stator St1 of the first motor generator MG1 in the axial direction. In this example, these are arranged so as to overlap in the axial direction with the coil end protruding from the core of the first stator St1 to the other side in the axial direction. With such an arrangement, it is possible to keep the axial dimension of the hybrid drive device 1 small.

Further, the first rotor Ro1 of the first motor generator MG1 is supported by the input shaft I at the support portion on one side in the axial direction. In the present embodiment, the sun gear s includes an extension shaft portion 32 extending to one side in the axial direction (engine E side), and the input shaft I has an extension shaft portion 32 extending to the axial center portion on the other side in the axial direction. It is provided with a hole 33 that can enter in the axial direction. The sun gear s is radially inside the input shaft I with respect to the input shaft I via a second rotor bearing 54 provided between the outer peripheral surface of the extension shaft 32 and the inner peripheral surface of the hole 33. It is supported so that it can rotate relative to each other. As a result, the first rotor Ro1 of the first motor generator MG1 is made compact by using the second rotor bearing 54 having a relatively small diameter at a position close to the axis of the input shaft I at the support portion on one end side in the axial direction. Can be supported. At this time, by using the second rotor bearing 54 having a relatively small diameter, the cost of the bearing can be reduced, and the overall cost of the hybrid drive device 1 can be reduced.

The output gear 12 is arranged coaxially with the planetary gear device P and the first motor generator MG1 on one side (engine E side) in the axial direction with respect to them. The output gear 12 includes an output gear main body 12a that meshes with the first gear 14 of the counter reduction mechanism C, and a cylindrical shaft portion 12b that extends on both sides in the axial direction with respect to the output gear main body 12a and has a cylindrical shape. I have. The output gear body 12a and the tubular shaft portion 12b are composed of one part. The output gear body 12a is formed as a gear having a relatively large diameter having an outer diameter larger than the outer diameter of the planetary gear device P. In the illustrated example, the output gear body 12a has substantially the same diameter as the first rotor Ro1 of the first motor generator MG1. The output gear main body 12a has a rim portion whose outer peripheral surface is a tooth surface and a web portion having a width smaller than that of the rim portion. In the illustrated example, the parking gear 63 is formed so as to project axially from the side surface of the web portion.

The tubular shaft portion 12b is formed as a cylindrical shaft portion having a relatively small diameter having an outer diameter smaller than the outer diameter of the planetary gear device P. The input shaft I is inserted through the shaft center of the tubular shaft portion 12b. Further, in this example, the ring gear r of the planetary gear device P is connected via the output gear connecting member 34 on the other side of the tubular shaft portion 12b in the axial direction. The output gear connecting member 34 is a member provided so as to extend radially inward from the ring gear r of the planetary gear device P. In the present embodiment, the output gear connecting member 34 is arranged along the radial direction and is centered in the radial direction. It is a disk-shaped member having a boss portion formed in the portion. The output gear connecting member 34 is arranged adjacent to the planetary gear device P on one side in the axial direction. Then, the axial one-side end of the ring gear r is connected to the radial outer end of the output gear connecting member 34, and the axial other-side end of the tubular shaft 12b is connected to the radial inner end. .. That is, the output gear body 12a is connected to the ring gear r of the planetary gear device P via the tubular shaft portion 12b and the output gear connecting member 34 on the radial side of the input shaft I. In the present embodiment, the tubular shaft portion 12b corresponds to the "connecting portion" in the present invention.

The output gear 12 is rotatably supported by a pair of output bearings 51 and 52. Here, the pair of output bearings 51 and 52 support the output gear 12 from both sides in the axial direction. Further, a tubular shaft portion 12b extending on both sides in the axial direction with respect to the output gear main body 12a is rotatably supported by the case 2 via output bearings 51 and 52, respectively. These pair of output bearings 51 and 52 are arranged so as to overlap with the planetary gear device P in the radial direction. In the illustrated example, the outer diameters of the pair of output bearings 51 and 52 are smaller than the outer diameter of the planetary gear device P (the outer diameter of the ring gear r). As a result, the pair of output bearings 51 and 52 are arranged so as to completely overlap the planetary gear device P in the radial direction. In the illustrated example, ball bearings capable of supporting a relatively large load are used as the output bearings 51 and 52.

As described above, the case 2 (main case 2a) includes a first intermediate support wall 42 arranged between the output gear 12 in the axial direction and the planetary gear device P. Further, in the case 2 (second cover 2c), the pump cover 44 is integrally attached to the stepped portion provided on the inner peripheral surface thereof. Then, the first output bearing 51 is supported by the pump cover 44, and the second output bearing 52 is supported by the first intermediate support wall 42. As a result, the output gear 12 is rotatably supported by the first intermediate support wall 42 via the output bearing 52 on the radial outer side of the tubular shaft portion 12b on the other side in the axial direction, and the tubular shaft on one side in the axial direction. It is rotatably supported by the pump cover 44 via the output bearing 51 on the radial outside of the portion 12b. Here, the pump cover 44 includes a cylindrical axially projecting portion 44a projecting to the other side in the axial direction (output gear 12 side), and the first output bearing 51 is supported on the radial inside of the axially projecting portion 44a. Has been done. Further, the first intermediate support wall 42 is provided with a cylindrical axial protrusion 42a that protrudes toward the output gear 12 in the axial direction around the tubular shaft portion 12b of the output gear 12, and the axial protrusion 42a. The second output bearing 52 is supported on the inside in the radial direction of.

Further, a through hole is provided in the axial center portion of the tubular shaft portion 12b, and the input shaft I is inserted through the through hole. The input shaft I penetrates the output gear 12 and is supported on the output gear 12 via a pair of input bearings 55 and 56 inside the tubular shaft portion 12b in the radial direction. That is, the input shaft I is rotated relative to the output gear 12 by a pair of input bearings 55 and 56 provided between the outer peripheral surface of the input shaft I and the inner peripheral surface of the through hole of the tubular shaft portion 12b. It is supported as possible. In the illustrated example, as the input bearings 55 and 56, needle bearings capable of relatively reducing the thickness in the radial direction are used.

As described above, in the present embodiment, the first shaft A1 in which the input shaft I, the planetary gear device P and the first motor generator MG1 are arranged, and the second shaft in which the second motor generator MG2 is arranged are arranged. The axis is different from A2. By arranging the second motor generator MG2 on an axis different from the input axis I in this way, the planetary gear device P, the first motor generator MG1 and the second motor generator MG2 are placed on the first axis A1. Compared with the case where they are arranged side by side, it is possible to shorten the axial length of the first axis A1.

3-2. Arrangement configuration of control device The control device 21 is arranged on the other side in the axial direction (the side opposite to the side connected to the engine E) with respect to the output gear 12, the planetary gear device P, and the first motor generator MG1. As described above, in this hybrid drive device 1, the planetary gear device P is arranged radially inside the first motor generator MG1 in the axial direction with the first motor generator MG1 so that the planetary gears are arranged. Compared with the case where the device P and the first motor generator MG1 are arranged side by side on the first axis A1, the axial length of the first axis A1 can be shortened. Further, by arranging the second motor generator MG2 on an axis different from the input axis I, it is possible to further shorten the axial length of the first axis A1. Therefore, a space corresponding to the shortened axial length is created on the other side of the input shaft I in the axial direction with respect to the output gear 12, the planetary gear device P, and the first motor generator MG1. Become. In the present embodiment, the control device 21 is arranged adjacent to the first motor generator MG1 with the first cover 2b interposed therebetween. As a result, the space created by shortening the axial length of the first axis A1 is effectively utilized to suppress the increase in size of the entire hybrid drive device 1.

Further, in this example, as described above, the second motor generator MG2 mainly functions as a motor that assists the driving force for traveling of the vehicle 7. Therefore, the second motor generator MG2 has a relatively large diameter and a long axial length so that it can output a large rotational driving force. As a result, the second motor generator MG2 is arranged so as to project significantly on the other side in the axial direction than the first motor generator MG1. Here, the control device 21 is arranged at a position that overlaps with the second motor generator MG2 in the axial direction. As a result, it is possible to shorten the axial length of the entire hybrid drive device 1 including the control device 21 by the length of the control device 21 and the second motor generator MG2 overlapping in the axial direction. Has been done.

Further, as shown in FIG. 3, the control device 21 is arranged at a position overlapping the first motor generator MG1 in the radial direction. Further, the control device 21 is arranged at a position that does not overlap with the second motor generator MG2 in the radial direction. Here, "overlapping in the radial direction" is an axial view seen from the rotation axis direction of the first motor generator MG1 (second motor generator MG2), and at least a part of the control device 21 is the first motor. -It means that it overlaps with the generator MG1 (second motor generator MG2). As mentioned above, the axial length of the first axis A1 is shortened, while the axial length of the second axis A2 is longer according to the size of the second motor generator MG2. .. Therefore, the control device 21 is located at a position that overlaps with the first motor generator MG1 in the axial view of the first axis A1 from the axial direction, and is in the axial view of the second axis A2 from the axial direction. By arranging it at a position that does not overlap with the second motor generator MG2, it is possible to appropriately arrange the control device 21 in the generated space and suppress the increase in size of the entire hybrid drive device 1.

[Other Embodiments] (1) In the above embodiment, the case where the control device 21 controls both the first motor generator MG1 and the second motor generator MG2 has been described as an example. However, embodiments of the present invention are not limited to this. That is, it is also one of the preferred embodiments of the present invention that the control device 21 is configured to control only one of the first motor generator MG1 and the second motor generator MG2. In this case, the other motor generator MG will be controlled by a second control device provided separately from the control device 21, but the second control device can be arranged at an arbitrary position.

(2) In the above embodiment, the case where the control device 21 is arranged at a position where it overlaps with the second motor generator MG2 in the axial direction has been described as an example. However, embodiments of the present invention are not limited to this. That is, arranging the control device 21 at a position that does not overlap with the second motor generator MG2 in the axial direction is also one of the preferred embodiments of the present invention. For example, the axial length of the second motor generator MG2 is shortened so that the end of the first motor generator MG1 on the other side in the axial direction and the end of the second motor generator MG2 on the other side in the axial direction become When the control device 21 and the second motor generator MG2 do not overlap in the axial direction when they are located at substantially the same position in the axial direction, it is sufficient to suppress the increase in size of the entire hybrid drive device 1. It is possible.

(3) In the above embodiment, the sun gear s includes an extension shaft portion 32 extending to one side in the axial direction (engine E side), and the extension shaft portion 32 is inside the radial direction of the input shaft I. The case where it is supported so as to be rotatable relative to the input axis I has been described as an example. However, embodiments of the present invention are not limited to this. That is, for example, the input shaft I is provided with an extension shaft portion that extends axially to the other side (opposite side to the engine E) in the axial direction, and the extension shaft portion of the input shaft is provided inside the radial direction of the sun gear s. It is also one of the preferred embodiments of the present invention to have a configuration in which the sun gear s is supported so as to be rotatable relative to the input shaft I (supporting the sun gear s on the radial outer side of the extension shaft portion of the input shaft).

(4) In the above embodiment, the case where the first intermediate support wall 42 is integrally formed with the main case 2a (case 2) has been described as an example. However, embodiments of the present invention are not limited to this. That is, for example, it is one of the preferred embodiments of the present invention that the first intermediate support wall 42 is configured as a separate part from the main case 2a (case 2) and is integrally attached to the case 2. is there.

(5) In the above embodiment, the hybrid drive device 1 includes the counter reduction mechanism C and the differential device 18, and the rotational driving force of the output gear 12 is transmitted to the output shaft O via the counter reduction mechanism C and the differential device 18. The case where it is done has been described as an example. However, embodiments of the present invention are not limited to this. That is, the counter deceleration mechanism C and the differential device 18 are not provided, and the rotational driving force of the output gear 12 is transmitted to the output shaft O directly or through only one of the counter deceleration mechanism C and the differential device 18. It is also one of the preferred embodiments of the present invention to have such a configuration.

(6) In the above embodiment, the counter reduction mechanism C includes a first gear 14, a second gear 16, and a counter shaft 15 connecting the first gear 14 and the second gear 16. , The case where both the output gear 12 and the second motor / generator output gear 13 are meshed with the first gear 14 has been described as an example. However, embodiments of the present invention are not limited to this. That is, for example, the counter reduction mechanism C may be further provided with a third gear, and only the output gear 12 may be meshed with the first gear 14 and the second motor / generator output gear 13 may be meshed with the third gear. , Is one of the preferred embodiments of the present invention.

(7) In the above embodiment, the case where the second gear 16 of the counter reduction mechanism C is arranged on one side (engine E side) in the axial direction with respect to the first gear 14 has been described as an example. However, embodiments of the present invention are not limited to this. That is, arranging the second gear 16 on the other side in the axial direction (opposite side to the engine E) from the first gear 14 is also one of the preferred embodiments of the present invention.

(8) In the above embodiment, the case where the oil pump 19 is arranged coaxially with the input shaft I and on one side in the axial direction (engine E side) with respect to the output gear 12 will be described as an example. did. However, embodiments of the present invention are not limited to this. That is, the position of the oil pump 19 is arbitrary, and for example, arranging the oil pump 19 in an empty space on an axis different from the input axis I is one of the preferred embodiments of the present invention.

(9) In the above embodiment, the case where the differential input gear 17 is arranged on one side (engine E side) in the axial direction with respect to the axial center portion 18a of the differential device 18 has been described as an example. .. However, embodiments of the present invention are not limited to this. That is, it is also one of the preferred embodiments of the present invention that the differential input gear 17 is arranged on the other side in the axial direction (opposite side to the engine E) with respect to the axial center portion 18a of the differential device 18. Is.

(10) In the above embodiment, the planetary gear device P is composed of a single pinion type planetary gear mechanism, the sun gear s is the first motor generator MG1, the carrier ca is the input shaft I, and the ring gear r is the output gear 12. The case of being connected has been described as an example. However, embodiments of the present invention are not limited to this. That is, for example, the planetary gear device P may be configured by a double pinion type planetary gear mechanism, or may be configured by combining a plurality of single pinion type or double pinion type planetary gear mechanisms, which is also a preferred embodiment of the present invention. It is one.

(11) In the above embodiment, a case where the drive device according to the present invention is applied to the hybrid drive device 1 for an FF (Front Engine Front Drive) vehicle has been described as an example. However, embodiments of the present invention are not limited to this. That is, the present invention can be adopted in the hybrid drive device 1 which is arranged adjacent to the engine E placed horizontally on the vehicle 7 in the width direction of the vehicle 7 and is connected in the axial direction of the engine output shaft Eo of the engine E. It is also one of the preferred embodiments of the present invention to be applied to an RR (Rear Engine Rear Drive) vehicle, an MR (Midship Engine Rear Drive) vehicle, or the like.

INDUSTRIAL APPLICABILITY The present invention can be suitably used for a driving device used for a vehicle equipped with an engine and a rotary electric machine as a driving force source, such as a hybrid vehicle.

<figref num="1">Expanded sectional view of the drive device according to the embodiment of the present invention.</figref><figref num="2">Sectional sectional view of the main part of the drive device which concerns on embodiment of this invention</figref><figref num="3">Side view of the drive device according to the embodiment of the present invention as viewed from the axial direction.</figref><figref num="4">Schematic diagram schematically showing the arrangement of the drive unit in the vehicle</figref>

Code description

1 Hybrid drive unit 2 Case (fixing member) 12 output gear 12b Cylindrical shaft (connection) 13 Second motor / generator output gear (second rotary electric machine output gear) 14 First gear 15 Counter shaft 16 Second gear 17 Differential input gear 18 Differential device (differential gear device) 19 oil pump 21 Control unit 32 Extension shaft 42 First Intermediate Support Wall (Intermediate Fixing Member) E engine I input axis O output shaft MG1 1st motor generator (1st rotary electric machine) MG2 2nd motor generator (2nd rotary electric machine) Ro1 first rotor P planetary gear device ca carrier s sun gear r ring gear