JP5093601B2 - Hybrid drive unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hybrid drive unit capable of reducing the cost and the noise level without increasing the size of the entire unit. <P>SOLUTION: A first planetary gear device P1 is arranged in an overlapping manner in the axial direction with a first rotating electric machine MG1 on the inner side in the radial direction of the first rotating electric machine MG1. A second planetary gear device P2 is arranged in an overlapping manner in the axial direction with a second rotating electric machine MG2 on the inner side in the radial direction of the second rotating electric machine MG2. The first rotating electric machine MG1 and the first planetary gear device P1, an output gear O arranged on the wheel side on the power transmission path, and the second rotating electric machine MG2 and the second planetary gear device P2 are arranged in this order along the axial direction concentrically with an input shaft I connected to an engine. A pair of output bearings 11, 12 is provided for rotatably supporting the output gear O from both sides in the axial direction. The pair of output bearings 11, 12 are arranged in an overlapping manner in the radial direction with the first planetary gear device P1 and the second planetary gear device P2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an input shaft coupled to an engine, a first rotating electrical machine, a second rotating electrical machine, and wheels relative to the input shaft, the first rotating electrical machine, and the second rotating electrical machine on a power transmission path. The present invention relates to a hybrid drive device including an output gear arranged on the side, a first planetary gear device, and a second planetary gear device.

  In recent years, hybrid vehicles that can improve engine fuel efficiency and reduce exhaust gas by combining an engine and a rotating electrical machine as a driving force source have been put into practical use. As an example of a hybrid drive device used in such a vehicle, an input shaft connected to an engine, a first rotating electrical machine, a second rotating electrical machine, the input shaft on the power transmission path, the first rotating electrical machine, and A so-called split-type hybrid drive device having an output gear arranged on the wheel side with respect to the second rotating electrical machine, and a first planetary gear device and a second planetary gear device each having three rotating elements is known. (For example, refer to Patent Document 1).

  In this hybrid drive device, of the three rotating elements of the first planetary gear device, the sun gear is connected to the first rotating electrical machine, the carrier is connected to the input shaft, and the ring gear is connected to the output gear. Of the three rotating elements of the second planetary gear device, the sun gear is connected to the second rotating electrical machine, the carrier is a case as a non-rotating member, and the ring gear is connected to the output gear. Further, in this hybrid drive device, the three gears, that is, the output gear, the ring gear of the first planetary gear device, and the ring gear of the second planetary gear device are constituted by one integrated substantially cylindrical part. The cylindrical part in which these three gears are integrated has an output gear formed at the axially central portion on the outer peripheral surface thereof, adjacent to each other on both axial sides of the inner peripheral surface, and the ring gear of the first planetary gear device and A ring gear of the second planetary gear device is formed. The cylindrical part is supported rotatably with respect to the case by two bearings provided on the outer peripheral surface of the cylindrical part on both axial sides with respect to the output gear.

  And it arrange | positions so that the carrier and sun gear of a 1st planetary gear apparatus, and the carrier and sun gear of a 2nd planetary gear apparatus may be accommodated in the radial inside of this cylindrical part according to arrangement | positioning of each ring gear. . In this way, the output gear, the ring gear of the first planetary gear device, and the ring gear of the second planetary gear device are constituted by one cylindrical part, and the output gear, the first planetary gear device, and the second planetary gear are constituted. In the case where these are arranged between the first rotating electrical machine and the second rotating electrical machine by arranging the devices overlapping in the axial direction, the first planetary gear device, the output gear, and the second planetary gear device are Compared to the configuration arranged in series in the axial direction, the overall axial dimension of the hybrid drive device is shortened.

JP 2006-262553 A

  However, in the hybrid drive device described above, two bearings provided on the outer peripheral surface of a cylindrical part in which three gears, that is, the output gear, the ring gear of the first planetary gear device, and the ring gear of the second planetary gear device are integrated. Thus, the structure is supported so as to be rotatable with respect to the case from the outside in the radial direction. Here, since the first planetary gear device and the second planetary gear device are accommodated inside the cylindrical part formed with three gears in the radial direction, the bearing is inevitably located radially outside the cylindrical part. Be placed. Moreover, the outer peripheral surface of the said cylindrical component is a diameter larger than the outer diameter of a 1st planetary gear apparatus and a 2nd planetary gear apparatus. Therefore, the bearing for rotatably supporting the cylindrical part in which the three gears are integrated also has a diameter larger than the outer diameter of the first planetary gear device and the second planetary gear device. The above hybrid drive apparatus has a problem that the manufacturing cost is increased by using such a large-diameter bearing. Further, by using such a large-diameter bearing, the bearing is supported at a position close to the peripheral wall of the case. Therefore, there has been a problem that noise of each gear generated by the rotation of the cylindrical part in which the three gears are integrated is easily transmitted to the peripheral wall of the case, and the noise is easily transmitted to the outside of the case. On the other hand, as described above, since the axial dimension of the hybrid drive device is shortened by accommodating two planetary gear devices in a cylindrical part in which three gears are integrated, if this structure is easily changed, The overall axial dimension of the hybrid drive can be large.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a hybrid drive device that can achieve cost reduction and noise reduction without increasing the overall size of the device. .

In order to achieve the above object, according to the present invention, an input shaft coupled to an engine, a first rotating electrical machine, a second rotating electrical machine, the input shaft on the power transmission path, the first rotating electrical machine, and the an output gear arranged on the wheel side of the second rotary electric machine, at least a first rotating element, a second rotating element, and a first planetary gear unit and the second planetary gear device respectively having a third rotating element, wherein The first planetary gear, the second planetary gear device, the first planetary gear device, the second planetary gear device, and a case that houses the output gear are characterized in that the hybrid drive device is characterized by the first planetary gear. The gear device is configured such that a first rotating element is connected to the first rotating electrical machine, a second rotating element is connected to the input shaft, and a third rotating element is connected to the output gear, and the second planetary gear device is connected to the first rotating element. Second rotating electrical machine, second rotation required The non-rotating member and the third rotating element are coupled to the output gear, and the first planetary gear device is arranged radially inward of the first rotating electrical machine and overlapping with the first rotating electrical machine in the axial direction. The second planetary gear device is disposed radially inward of the second rotating electrical machine, overlapping with the second rotating electrical machine in the axial direction, coaxially with the input shaft, along the axial direction, The first rotating electrical machine, the first planetary gear device, the output gear, the second rotating electrical machine, and the second planetary gear device are arranged in this order, and the case includes a case peripheral wall that covers the outer periphery of each housing component, and a shaft A first intermediate support wall disposed between the output gear in the direction and the first planetary gear device and extending radially from the case peripheral wall; and between the output gear and the second planetary gear device in the axial direction. It is arranged in the radial direction from the case peripheral wall A second intermediate support wall extending to the output gear body, the output gear extending to both sides in the axial direction with respect to the output gear main body, and an extension shaft having a smaller diameter than the first planetary gear device and the second planetary gear device. A third rotating element of the first planetary gear device is disposed on the second planetary gear device side with respect to the first planetary gear device via a first output connecting member extending in the radial direction. The third rotating element of the second planetary gear device is arranged on the first planetary gear device side with respect to the second planetary gear device. The second output connecting member extending in the radial direction is connected to the output gear at the extension shaft portion on the other side in the axial direction, and the output to the first planetary gear device and the second planetary gear device. On the gear side, the output gear is rotatably supported from both axial sides. A pair of output bearings, wherein the pair of output bearings is provided between the first intermediate support wall and the second intermediate support wall and the extending shaft portions on both sides in the axial direction. And the second planetary gear device is arranged so as to overlap in the radial direction.

  In the present application, “connect” includes a structure in which two members to be connected are directly connected, and is indirectly connected between the two members via one or more other members. Includes structure. Further, in the present application, the “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.

According to this characteristic configuration, the first rotating electrical machine, the first planetary gear device, the output gear, the second rotating electrical machine, and the second planetary gear device are arranged in this order along the axial direction on the same axis as the input shaft. By providing a pair of output bearings that rotatably support the output gear from both sides in the axial direction on the output gear side with respect to the first planetary gear device and the second planetary gear device, the pair of output bearings is the first like the conventional one. It is not arranged radially outward with respect to the planetary gear device and the second planetary gear device. In addition, since the pair of output bearings is configured to overlap with the first planetary gear device and the second planetary gear device in the radial direction, the output bearing supporting the output gear has a smaller diameter than the conventional one. Yes. Therefore, the cost of the output bearing can be reduced, and the overall cost of the hybrid drive device can be reduced. Furthermore, a pair of output bearings radially extends between the output gear and the second planetary gear unit from the case peripheral wall and a first intermediate support wall extending radially between the output gear and the first planetary gear unit from the case peripheral wall. By being configured to be respectively supported by the second intermediate support wall extending to, the output bearing is supported at a position away from the radially inner case peripheral wall in the case. Therefore, the noise of each gear generated by the rotation of the output gear and the third rotating element of the first planetary gear device connected to the output gear and the third rotating element of the second planetary gear device is made difficult to be transmitted to the case peripheral wall, It is possible to effectively suppress the propagation of noise.

  In addition, the first planetary gear device is disposed axially overlapping the first rotating electrical machine on the radially inner side of the first rotating electrical machine, and the second planetary gear device is disposed on the radially inner side of the second rotating electrical machine. By overlapping with the rotating electrical machine in the axial direction, the axial overlap between the first planetary gear device and the first rotating electrical machine, and the axial overlap between the second planetary gear device and the second rotating electrical machine. The axial dimension of the hybrid drive device can be shortened by a length corresponding to minutes. Therefore, although the first planetary gear device, the output gear, and the second planetary gear device are arranged in series along the axial direction, the overall axial dimension of the hybrid drive device is not increased. Alternatively, the axial dimension can be further reduced as compared with the conventional case. Since the first planetary gear device and the second planetary gear device are arranged by using the radially inner region of the rotor of the first rotating electrical machine and the second rotating electrical machine, which has a relatively large margin from the past, An increase in the size of the first rotating electric machine and the second rotating electric machine in the radial direction can also be suppressed. As described above, cost reduction and noise reduction can be achieved without increasing the overall size of the hybrid drive device.

Here, the output gear is extended to both sides in the axial direction with respect to the output gear main body, and includes an extended shaft portion having a smaller diameter than the first planetary gear device and the second planetary gear device, and a pair of the output gears The bearings are arranged between the output gear main body and the first planetary gear device in the axial direction and between the output gear main body and the second planetary gear device, respectively, and are shafts with respect to the output gear main body. you rotatably supporting the extension Dejiku portion of both sides, respectively.

  According to this configuration, the output gear is rotatably supported by the pair of output bearings from both sides in the axial direction, and the pair of output bearings are arranged to overlap the first planetary gear device and the second planetary gear device in the radial direction. The configuration can be realized appropriately. Accordingly, the diameter of the output bearing can be reduced to reduce the cost of the output bearing, and the overall cost of the hybrid drive apparatus can be reduced. In addition, by reducing the diameter of the output bearing, it is possible to support the output bearing at a position away from the case peripheral wall on the radially inner side in the case, and noise is transmitted to the case peripheral wall via the output bearing. The noise can be reduced by suppressing the noise.

Further, the third rotating element of the first planetary gear device is connected to the output gear via a first output connecting member arranged on the second planetary gear device side with respect to the first planetary gear device, third rotating element of the second planetary gear unit is connected to the output gear through the second output coupling member disposed on the first planetary gear device side with respect to the second planetary gear unit.

  According to this configuration, the first planetary gear device, the output gear, and the second planetary gear device are arranged in this order along the axial direction. The third rotating element of the one planetary gear device and the output gear can be connected, and the third rotating element of the second planetary gear device and the output gear can be connected on the output gear side with respect to the second planetary gear device. Therefore, the third rotating element of the first planetary gear device and the third rotating element of the second planetary gear device can be appropriately connected to the output gear.

  A first space formed on the radially inner side of the first rotating electrical machine to receive the first planetary gear device; and formed on the radially inner side of the second rotating electrical machine to accommodate the second planetary gear device. It is preferable that the second space to be opened is open to the sides facing each other in the axial direction.

  According to this configuration, the connection between the third rotating element and the output gear of the first planetary gear device disposed on the radially inner side of the first rotating electrical machine, and the second disposed on the radially inner side of the second rotating electrical machine. The third rotating element of the planetary gear device and the output gear can be easily connected.

  The first rotor of the first rotating electrical machine is coupled to the first rotating element of the first planetary gear device via a first rotor coupling member extending radially inward from the first rotor, The second rotor of the two-rotor electric machine is connected to the first rotating element of the second planetary gear device via a second rotor connecting member extending radially inward from the second rotor, and the first rotor connecting member Is disposed on the side opposite to the second planetary gear device side with respect to the first planetary gear device, and the second rotor connecting member is on the first planetary gear device side with respect to the second planetary gear device. It is preferable to adopt a configuration that is arranged on the opposite side.

  According to this configuration, the space for accommodating the first planetary gear device formed on the radially inner side of the first rotating electrical machine and the space for housing the second planetary gear device formed on the radially inner side of the second rotating electrical machine. Are configured to open to the sides facing each other in the axial direction. Therefore, the connection of the third rotating element and the output gear of the first planetary gear device arranged on the radially inner side of the first rotating electrical machine, and the second planetary gear device arranged on the radially inner side of the second rotating electrical machine. The third rotating element and the output gear can be easily connected.

  The first planetary gear device is housed in a space surrounded by the inner peripheral surface of the first rotor and the first rotor connecting member, and the inner peripheral surface of the second rotor and the second rotor connecting member It is preferable that the second planetary gear device is accommodated in a space surrounded by.

  According to this configuration, the first planetary gear device is appropriately arranged on the radially inner side of the first rotating electrical machine so as to overlap the first rotating electrical machine in the axial direction, and the second planetary gear device is rotated in the second rotational direction. It can arrange | position appropriately so that it may overlap with the said 2nd rotary electric machine in the axial direction inside radial direction of an electric machine.

  In addition, one or both of the first intermediate support wall and the second intermediate support wall include an axial protrusion that protrudes toward the output gear in the axial direction, and the output bearing is supported by the axial protrusion. It is preferable to adopt a configuration.

  According to this configuration, the output bearing can be appropriately supported by one or both of the first intermediate support wall and the second intermediate support wall.

  In addition, it is preferable that at least one of the pair of output bearings is configured to overlap with a tooth surface of the output gear in the axial direction.

  According to this configuration, the axial dimension of the arrangement region of the output gear and the output bearing can be shortened, so that the overall axial dimension of the hybrid drive device can also be shortened.

The first rotor of said first rotating electrical machine is coupled to the first rotating element of the first planetary gear unit through a first rotor connecting member extending from said first rotor radially inwardly, the first The second rotor of the two-rotating electric machine is connected to the first rotating element of the second planetary gear device via a second rotor connecting member extending radially inward from the second rotor, and rotates the first rotor. The first rotor bearing that can be supported is provided so as to support an inner peripheral surface of an axial projecting portion that is projected in the axial direction from the first rotor coupling member, and rotatably supports the second rotor. The second rotor bearing is provided so as to support an inner peripheral surface of an axial protruding portion that is formed to protrude in the axial direction from the second rotor coupling member, and the pair of output bearings is an outer periphery of the extending shaft portion. It is configured to support the surface To be suitable.

  According to this configuration, the first rotor, the output gear, and the second rotor bearings are arranged so as not to interfere with other members such as the input shaft and the bearings supporting the members, and these are appropriately supported. Is possible.

  Further, one end of the input shaft is inserted into a shaft insertion hole provided in the shaft center portion of the output gear, and is disposed between the inner peripheral surface of the shaft insertion hole and the outer peripheral surface of the input shaft. It is preferable that the structure is supported rotatably on the inner peripheral surface of the shaft insertion hole via an input bearing.

  According to this configuration, one end of the input shaft inserted into the shaft insertion hole provided in the shaft center portion of the output gear is indirectly supported by the case via the input bearing, the output gear, and the output bearing. be able to. Accordingly, the input shaft can be appropriately supported at a position overlapping with the output gear arranged in the vicinity of the central portion in the axial direction in the case in the axial direction.

  Further, one end of the input shaft passes through a shaft insertion hole provided in the shaft center portion of the output gear, and is rotatable by an input bearing disposed on the second rotating electrical machine side with respect to the output gear. A supported configuration is preferable.

  According to this configuration, the one end portion of the input shaft can be supported so as to be appropriately rotatable at a position on the second rotating electrical machine side with respect to the output gear.

  Here, as a specific configuration of the first planetary gear device, for example, a sun gear, a carrier, and a ring gear are provided as rotating elements. The sun gear has the first rotating electrical machine, the carrier has the input shaft, and the ring gear has the output gear. A connected structure is preferable.

  As a specific configuration of the second planetary gear device, for example, a sun gear, a carrier, and a ring gear are provided as rotating elements, the second rotating electrical machine is connected to the sun gear, the non-rotating member is connected to the carrier, and the output gear is connected to the ring gear. It is preferable to adopt the configuration described above.

  Alternatively, as a specific configuration of the second planetary gear device, for example, a sun gear, a carrier, and a ring gear are provided as rotating elements, and the second rotating electrical machine is connected to the sun gear, the output gear is connected to the carrier, and a non-rotating member is connected to the ring gear. It is preferable to adopt the configuration described above.

1. First Embodiment First, a hybrid drive device H according to a first embodiment of the present invention will be described with reference to the drawings. Here, the hybrid drive device H is a drive device for a hybrid vehicle that uses both an engine and a rotating electrical machine as a drive force source of the vehicle. FIG. 1 is a cross-sectional view of a main part of the hybrid drive device H, and FIG. 2 is an overall cross-sectional view of the hybrid drive device H. As shown in these drawings, the hybrid drive device H includes an input shaft I connected to the engine, a first motor / generator MG1, a second motor / generator MG2, and an input shaft on the power transmission path. I, an output gear O arranged on the wheel (not shown) side with respect to the first motor / generator MG1 and the second motor / generator MG2, a first planetary gear device P1 and a second planetary gear device P2, It has. The hybrid drive device H controls the rotation of the first motor / generator MG1 to change the rotational driving force of the input shaft I steplessly through the first planetary gear device P1 to the output gear O. The electric continuously variable transmission which transmits is comprised. The second motor / generator MG2 is configured to be able to transmit the rotational driving force to the output gear O via the second planetary gear unit P2. In the present embodiment, the first motor / generator MG1 corresponds to the “first rotating electrical machine” in the present invention, and the second motor / generator MG2 corresponds to the “second rotating electrical machine” in the present invention.

  The first motor / generator MG1, the second motor / generator MG2, the output gear O, the first planetary gear device P1, and the second planetary gear device P2 are arranged on the same axis as the input shaft I and are not rotated. It is housed in a case DC as a member. Further, as shown in FIG. 2, in the present embodiment, the output gear O is drivingly connected to a wheel (not shown) via a counter speed reduction mechanism CR and a differential device DE. The counter deceleration mechanism CR and the differential device DE are arranged in parallel to each other on an axis different from the input shaft I. That is, in this hybrid drive device H, the input shaft I, the first motor / generator MG1, the second motor / generator MG2, the output gear O, the first planetary gear device P1, and the second planetary gear device P2 are arranged. The three-axis configuration includes one axis, a second axis on which the counter reduction mechanism CR is disposed, and a third axis on which the differential device DE is disposed. The case DC is configured to accommodate the counter speed reduction mechanism CR and the differential device DE in common. That is, the hybrid drive device H is a drive device having a transaxle configuration in which the electric continuously variable transmission and the differential device DE are integrally accommodated in a case DC. Hereinafter, the configuration of each part of the hybrid drive device H will be described in detail.

1-1. Functions and Connection Configurations of Each Part First, functions and connection structures of each part of the hybrid drive device H according to the present embodiment will be described. The input shaft I is connected to the engine via a damper. Here, the illustration of the damper and the engine is omitted. As the engine, for example, various known internal combustion engines such as a gasoline engine and a diesel engine can be used. The input shaft I may be directly connected to the engine or may be connected via a clutch or the like other than the damper. Further, the input shaft I is connected to rotate integrally with the carrier ca1 of the first planetary gear device P1.

  The output gear O is disposed on the wheel side with respect to the input shaft I, the first motor / generator MG1, and the second motor / generator MG2 on the power transmission path, and the input shaft I, the first motor / generator MG1, The rotational driving force of the two motor generator MG2 is transmitted to the wheel side. Therefore, the output gear O is coupled so as to rotate integrally with both the ring gear r1 as the output rotation element of the first planetary gear device P1 and the ring gear r2 as the output rotation element of the second planetary gear device P2. As shown in FIG. 2, the output gear O is drivingly connected to a wheel (not shown) via a counter speed reduction mechanism CR and a differential device DE. Specifically, the output gear O meshes with the counter driven gear cr2 of the counter reduction mechanism CR. Accordingly, the output gear O is transmitted from the input shaft I and the first motor / generator MG1 via the first planetary gear unit P1, or from the second motor / generator MG2 via the second planetary gear unit P2. It functions as an output member that outputs the rotational driving force to the wheel side.

  The counter deceleration mechanism CR includes a counter shaft cr1 disposed in parallel with the input shaft I, and includes a counter driven gear cr2 and a differential drive gear cr3 that rotate integrally with the counter shaft cr1. The differential drive gear cr3 has a smaller diameter than the counter driven gear cr2. The differential drive gear cr3 meshes with a differential input gear (diff ring gear) de1 of the differential device DE. The differential device DE distributes the rotational driving force of the differential input gear de1 to the left and right wheels. With the above connection configuration, the output gear O and the wheel are drivingly connected. In the present embodiment, the output gear O is integrally provided with a parking gear pa.

  As shown in FIGS. 1 and 2, the first motor / generator MG1 includes a first stator St1 fixed to the case DC, and a first rotor Ro1 rotatably supported on the radially inner side of the first stator St1. ,have. The first rotor Ro1 is coupled to rotate integrally with the sun gear s1 of the first planetary gear device P1. The second motor / generator MG2 includes a second stator St2 fixed to the case DC, and a second rotor Ro2 rotatably supported on the radially inner side of the second stator St2. The second rotor Ro2 is connected to rotate integrally with the sun gear s2 of the second planetary gear device P2. The first motor / generator MG1 and the second motor / generator MG2 are each electrically connected to a power storage device such as a battery or a capacitor via an inverter (not shown). Each of the first motor / generator MG1 and the second motor / generator MG2 functions as a motor (electric motor) that generates power by receiving power and a generator (power generation) that generates power by receiving power. Function).

  In this example, the first motor / generator MG1 generates power by the driving force of the input shaft I (engine) input mainly through the first planetary gear device P1, charges the power storage device, or the second motor. It functions as a generator that supplies power for driving the generator MG2. However, the first motor / generator MG1 may function as a motor that outputs a driving force by power running when the vehicle is traveling at a high speed or when the engine is started. On the other hand, the second motor / generator MG2 mainly functions as a motor that assists the driving force for driving the vehicle. However, the second motor / generator MG2 may function as a generator when the vehicle is decelerated, and may function as a generator that regenerates the inertial force of the vehicle as electric energy.

  The first planetary gear device P1 is configured by a single pinion type planetary gear mechanism. That is, the first planetary gear device P1 includes a carrier ca1 that supports a plurality of pinion gears, and a sun gear s1 and a ring gear r1 that mesh with the pinion gears, respectively, as rotating elements. The sun gear s1 is coupled to rotate integrally with the first rotor Ro1 of the first motor / generator MG1. The carrier ca1 is coupled to rotate integrally with the input shaft I. The ring gear r1 is coupled to rotate integrally with the output gear O. Thereby, the ring gear r1 is connected via the output gear O so as to rotate together with the ring gear r2 of the second planetary gear device P2. In the present embodiment, the sun gear s1, the carrier ca1, and the ring gear r1 are respectively referred to as “first rotating element”, “second rotating element”, and “third rotating element” of the first planetary gear device P1 in the present invention. Is equivalent to.

  Similar to the first planetary gear device P1, the second planetary gear device P2 includes a single pinion type planetary gear mechanism. That is, the second planetary gear device P2 has a carrier ca2 that supports a plurality of pinion gears, and a sun gear s2 and a ring gear r2 that mesh with the pinion gears, respectively, as rotating elements. The sun gear s2 is coupled to rotate integrally with the second rotor Ro2 of the second motor / generator MG2. The carrier ca2 is connected to a case DC as a non-rotating member and is fixed so as not to rotate. The ring gear r2 is connected to rotate integrally with the output gear O. In the present embodiment, the sun gear s2, the carrier ca2, and the ring gear r2 are the “first rotating element”, “second rotating element”, and “third rotating element” of the second planetary gear device P2 in the present invention, respectively. Is equivalent to.

  FIG. 3 is a velocity diagram showing an operation state of the first planetary gear device P1 and the second planetary gear device P2 during traveling of the vehicle. In these velocity diagrams, the vertical axis corresponds to the rotational speed of each rotating element, the rotational speed is zero on the horizontal axis, the upper side is positive, and the lower side is negative. Each of the plurality of vertical lines arranged in parallel corresponds to each rotating element of the first planetary gear device P1 and the second planetary gear device P2. That is, “s1”, “ca1”, and “r1” described above each vertical line in FIG. 3 correspond to the sun gear s1, the carrier ca1, and the ring gear r1 of the first planetary gear device P1, respectively, and “s2”. , “Ca2” and “r2” correspond to the sun gear s2, the carrier ca2, and the ring gear r2 of the second planetary gear device P2, respectively. In FIG. 3, the interval between the vertical lines corresponding to each rotating element is the respective gear ratio of the first planetary gear device P1 and the second planetary gear device P2 (the gear ratio of the sun gear and the ring gear = [the number of teeth of the sun gear). ] / [Number of teeth of ring gear]). In these speed diagrams, “Δ” represents the rotational speed of the input shaft I (engine), “☆” represents the rotational speed of the output gear O, “◯” represents the rotational speed of the first motor / generator MG1, and “ “□” indicates the rotational speed of the second motor / generator MG2, and “×” indicates a fixed state of the case DC as a non-rotating member. In addition, the arrow shown adjacent to these symbols has shown an example of the direction of the torque transmitted to each rotation element.

  The first planetary gear device P1 functions to distribute the rotational driving force of the input shaft I (engine) to the output gear O and the first motor / generator MG1, as shown by a straight line L1 in FIG. That is, in the first planetary gear device P1, the carrier ca1 that is intermediate in the order of the rotational speed rotates integrally with the input shaft I (engine). The rotation of the carrier ca1 is distributed to the sun gear s1 that is one end in the order of the rotation speed in the first planetary gear device P1, and the ring gear r1 that is the other end in the order of the rotation speed. The rotation distributed to the ring gear r1 is transmitted to the output gear O, and the rotation distributed to the sun gear s1 is transmitted to the first rotor Ro1 of the first motor / generator MG1 (see FIG. 1). At this time, the engine outputs a positive torque corresponding to the required driving force from the vehicle side while being controlled so as to be maintained in a state where the efficiency is high and the exhaust gas is low (generally along the optimum fuel consumption characteristics) This torque is transmitted to the carrier ca1 via the input shaft I. On the other hand, the first motor / generator MG1 transmits the torque of the input shaft I to the sun gear s1 by outputting a 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 O. At this time, the rotational speed of the output gear O is determined by the rotational speed of the first motor / generator MG1. In a normal running state, the first motor / generator MG1 generates power by generating a torque in the negative direction while rotating forward (rotation speed is positive). On the other hand, when the vehicle speed is high (the rotational speed of the output gear O is high), the first motor / generator MG1 may perform power running by generating negative torque while rotating negatively (rotating speed is negative).

  The second planetary gear set P2 has a function of decelerating the rotation of the second motor / generator MG2 and transmitting it to the output gear O, as indicated by a straight line L2 in FIG. As a result, the rotational driving force of the second motor / generator MG2 is amplified and transmitted to the output gear O. As described above, in the second planetary gear device P2, the carrier ca2 that is intermediate in the order of the rotation speed in the second planetary gear device P2 is fixed to the case DC, and the rotation speed is zero. In this case, the rotation of the sun gear s2 that is one end in the order of the rotation speed is decelerated according to the gear ratio of the second planetary gear device P2, and is transmitted to the ring gear r2 that is the other end in the order of the rotation speed. . As a result, the second planetary gear set P2 decelerates the rotation of the second motor / generator MG2 coupled to the sun gear s2, and transmits it to the output gear O coupled to the ring gear r2. Then, the second motor / generator MG2 appropriately corrects the driving force distributed from the first planetary gear unit P1 to the output gear O according to the required driving force from the vehicle side, the traveling state of the vehicle, and the like. Outputs torque in the direction or negative direction.

1-2. Detailed Structure of Each Part Next, a detailed structure of each part of the hybrid drive device H according to the present embodiment will be described mainly with reference to FIG. As described above, in this hybrid drive device H, the first motor / generator MG1, the second motor / generator MG2, the output gear O, the first planetary gear device P1, and the second planetary gear device are arranged coaxially with the input shaft I. P2 is arranged. At this time, the first planetary gear device P1 is arranged radially inward of the first motor / generator MG1 so as to overlap the first motor / generator MG1 in the axial direction, and the second planetary gear device P2 is connected to the second planetary gear device P2. The second motor / generator MG2 and the second motor / generator MG2 are disposed so as to overlap with each other in the radial direction of the motor / generator MG2. And these are the first motor / generator MG1 and the first planetary gear set P1, the output gear O, the second motor / generator MG2 and the second planet from the engine side (the right side in FIG. 1) connected to the input shaft I. They are arranged in the order of the gear device P2. Hereinafter, details of the arrangement, shape, shaft support structure, and the like of each part will be described in order.

1-2-1. Case This hybrid drive device H includes a first motor / generator MG1, a second motor / generator MG2, a first planetary gear device P1, a second planetary gear device P2, and a case DC that houses an output gear O. As described above, in the present embodiment, the case DC is configured to accommodate the counter speed reduction mechanism CR and the differential device DE in common. The case DC includes a case peripheral wall d3 that covers the outer periphery of each housing component that is housed therein, a first end support wall d4 that closes an end opening on one axial side of the case peripheral wall d3, and a case peripheral wall d3. And a second end support wall d5 that closes the end opening on the other side in the axial direction. Here, the first end support wall d4 is disposed on one axial side (the right side in FIG. 1) with respect to the first motor / generator MG1, and the second end support wall d5 is disposed on the second motor / generator MG2. Is disposed on the other side in the axial direction (left side in FIG. 1). Further, the case DC includes a first intermediate support wall d1 disposed between the output gear O in the axial direction and the first planetary gear device P1, and the output gear O and the second planetary gear device P2 in the axial direction. And a second intermediate support wall d2 disposed therebetween.

  In the present embodiment, the case DC includes a main case DC1, a first cover DC2 attached to one axial side of the main case DC1, and a second cover DC3 attached to the other axial side of the main case DC1. It can be divided into Here, the main case DC <b> 1 has a case peripheral wall d <b> 3 and is configured to accommodate main components of the hybrid drive device H. In the illustrated example, the second intermediate support wall d2 is formed integrally with the main case DC1 (case DC). On the other hand, the first intermediate support wall d1 is configured as a separate part from the main case DC1 (case DC), and is in contact with a step portion provided on the inner peripheral surface of the main case DC1 from one side in the axial direction. It is configured to be integrally attached. Moreover, the axial direction both ends of this main case DC1 are made into the opening part, and each accommodation component accommodated in the inside of case DC is accommodated and assembled | attached from those openings. Here, from one axial direction side of the main case DC1, the output gear O, the first intermediate support wall d1, the first planetary gear device P1, and the first motor / generator MG1 are housed and assembled in order. Further, the second planetary gear device P2 and the second motor / generator MG2 are sequentially housed and assembled from the other axial side of the main case DC1.

  And after each of these accommodation components are accommodated, the 1st cover DC2 is attached to the axial direction one side of main case DC1, and the 2nd cover DC3 is attached to the axial direction other side of main case DC1. Here, a first end support wall d4 is formed in the first cover DC2. Further, a second end support wall d5 is formed in the second cover DC3. The first cover DC2, the second cover DC3, and the first intermediate support wall d1 are attached to the main case DC1 using, for example, a fastening member such as a bolt. The shape and configuration of the first end support wall d4, the second end support wall d5, the first intermediate support wall d1, and the second intermediate support wall d2 will be described in detail below.

1-2-2. Output Gear The output gear O is disposed between the first planetary gear device P1 and the second planetary gear device P2 in the axial direction without overlapping with them in the axial direction. The output gear O is arranged coaxially with the first planetary gear unit P1 (and the first motor / generator MG1) and the second planetary gear unit P2 (and the second motor / generator MG2). The output gear O is an output gear main body o1 meshing with the counter driven gear cr2 of the counter reduction mechanism CR, and extends to both sides in the axial direction with respect to the output gear main body o1, and has an extended shaft portion o2 having a smaller diameter than the output gear main body o1. It has. Here, the output gear main body o1 and the extending shaft portion o2 are formed of one component. The output gear body o1 is formed as a relatively large gear having an outer diameter larger than the outer diameters of the first planetary gear device P1 and the second planetary gear device P2. In the illustrated example, the output gear main body o1 has substantially the same diameter as the first rotor Ro1 of the first motor / generator MG1 and the second rotor Ro2 of the second motor / generator MG2. The output gear main body o1 has a rim portion whose outer peripheral surface is a tooth surface, and a web portion having a small width with respect to the rim portion. In the illustrated example, the parking gear pa is formed so as to protrude in the axial direction from the side surface of the web portion.

  The extension shaft portion o2 is formed as a relatively small-diameter cylindrical shaft portion having an outer diameter smaller than the outer diameter of the first planetary gear device P1 and the second planetary gear device P2. In this example, the outer peripheral surface of the extending shaft portion o2 has a stepped shape that decreases in diameter in two steps toward both ends in the axial direction. And the output gear main body o1 is connected to the axial direction central part which becomes the largest diameter in the outer peripheral surface of the extending shaft part o2, and the intermediate part which is an intermediate diameter located on both sides with respect to the axial central part The output bearings 11 and 12 are externally fitted, and connecting portions 31 and 32 are formed at the small diameter portions at both ends of the extending shaft portion o2. These connecting portions 31 and 32 are connected to the ring gear r1 of the first planetary gear device P1 and the ring gear r2 of the second planetary gear device P2, respectively. The extension shaft portion o2 is rotatably supported by the case DC via the output bearings 11 and 12. Further, a through hole is provided in the axial center portion of the extended shaft portion o2, and this through hole is a shaft insertion hole o3 through which the input shaft I and the fixed shaft F are inserted. As will be described later, one end of the input shaft I and one end of the fixed shaft F are rotatably supported in the shaft insertion hole o3. The fixed shaft F is a shaft as a non-rotating member fixed to the case DC, and is connected to the carrier ca2 of the second planetary gear device P2.

  The output gear O is rotatably supported by a pair of output bearings 11 and 12. Here, the pair of output bearings 11 and 12 support the output gear O from both sides in the axial direction on the output gear O side with respect to the first planetary gear device P1 and the second planetary gear device P2. Therefore, the pair of output bearings 11 and 12 are arranged between the output gear main body o1 and the first planetary gear device P1 and between the output gear main body o1 and the second planetary gear device P2 in the axial direction, respectively. Yes. Further, as described above, the extended shaft portions o2 positioned on both sides in the axial direction with respect to the output gear main body o1 are rotatably supported by the case DC via the output bearings 11 and 12, respectively. In the present embodiment, the pair of output bearings 11 and 12 are provided so as to support the outer peripheral surface of the extending shaft portion o2. Thereby, the output gear O is rotatably supported by the case DC via the output bearings 11 and 12 supported by the case DC on the radially outer side with respect to the shaft insertion hole o3 provided in the shaft center portion. . The pair of output bearings 11 and 12 are arranged so as to overlap with the first planetary gear device P1 and the second planetary gear device P2 in the radial direction. Here, the pair of output bearings 11 and 12 are arranged coaxially with the first planetary gear device P1 and the second planetary gear device P2. Therefore, the pair of output bearings 11 and 12 has an inner diameter smaller than the outer diameters of both the first planetary gear device P1 and the second planetary gear device P2, respectively. The two planetary gear units P2 can be arranged so as to overlap in the radial direction. In the illustrated example, each of the pair of output bearings 11 and 12 has an outer diameter smaller than the outer diameters of both the first planetary gear device P1 and the second planetary gear device P2. Thus, the pair of output bearings 11 and 12 are disposed so as to completely overlap the first planetary gear device P1 and the second planetary gear device P2 in the radial direction. In the illustrated example, ball bearings capable of supporting a relatively large load are used as the output bearings 11 and 12.

  As described above, the case DC includes the first intermediate support wall d1 disposed between the output gear O in the axial direction and the first planetary gear device P1, the output gear O in the axial direction, and the second planetary gear device P2. And a second intermediate support wall d2. The pair of output bearings 11 and 12 are respectively supported by the first intermediate support wall d1 and the second intermediate support wall d2. That is, the first output bearing 11 on one side in the axial direction (first motor / generator MG1 side, right side in FIG. 1, hereinafter the same) is supported by the first intermediate support wall d1, and the other side in the axial direction (second motor / generator). The second output bearing 12 on the MG2 side, the left side in FIG. 1, the same applies hereinafter) is supported by the second intermediate support wall d2. Thus, the output gear O is rotatably supported by the first intermediate support wall d1 and the second intermediate support wall d2 on the both sides in the axial direction via the output bearings 11 and 12, respectively. By the way, the first intermediate support wall d1 includes a boss-shaped axial protrusion d1a that protrudes toward the output gear O in the axial direction around the output gear O (extension shaft part o2). The first output bearing 11 is supported on the radially inner side of the part d1a. Similarly, the second intermediate support wall d2 includes a boss-shaped axial protrusion d2a that protrudes toward the output gear O in the axial direction around the output gear O (extension shaft part o2 thereof). The second output bearing 12 is supported on the radially inner side of the protrusion d2a. In the illustrated example, the second output bearing 12 is disposed so as to overlap the tooth surface of the output gear O in the axial direction. That is, the axially projecting portion d2a of the second output bearing 12 and the second intermediate support wall d2 that supports the second output bearing 12 is positioned so as to overlap with the rim portion in which the tooth surface is formed on the outer peripheral surface of the output gear body o1 in the axial direction. Has been placed.

  The output gear O is composed of separate parts from the ring gear r1 of the first planetary gear device P1 and the ring gear r2 of the second planetary gear device P2. And it connects so that it may rotate integrally with the ring gear r1 of the 1st planetary gear apparatus P1 via the 1st connection part 31 in the axial direction one side, and the 2nd planetary gear via the 2nd connection part 32 in the axial direction other side. The ring gear r2 of the device P2 is connected to rotate integrally. In the present embodiment, the ring gear r1 of the first planetary gear device P1 is coupled to the first coupling portion 31 via the first output coupling member 33, and the ring gear r2 of the second planetary gear device P2 is coupled to the second output coupling member. It is connected to the second connecting part 32 via the member 34. The first output connecting member 33 is a member provided so as to extend radially inward from the ring gear r1 of the first planetary gear device P1, and is arranged along the radial direction in the present embodiment, The disk-shaped member has a boss formed at the center in the radial direction. The first output connecting member 33 is disposed adjacent to the second planetary gear device P2 side (the other side in the axial direction) with respect to the first planetary gear device P1. The other end in the axial direction of the ring gear r1 is connected to the radially outer end of the first output connecting member 33, and the output gear O is connected to the radially inner end via the first connecting portion 31. . The second output connecting member 34 is a member provided so as to extend radially inward from the ring gear r2 of the second planetary gear device P2, and is arranged along the radial direction in the present embodiment, The disk-shaped member has a boss formed at the center in the radial direction. The second output connecting member 34 is disposed adjacent to the second planetary gear device P2 on the first planetary gear device P1 side (one axial direction side). Then, one end in the axial direction of the ring gear r2 is connected to the radially outer end of the second output connecting member 34, and the output gear O is connected to the radially inner end via the second connecting portion 32. .

  The first connecting portion 31 and the second connecting portion 32 engage the output gear O with the ring gear r1 of the first planetary gear device P1 and the ring gear r2 of the second planetary gear device P2 at least in the axial direction (rotation direction). Any known configuration can be used, and various known connection structures can be used. In the present embodiment, the first connecting portion 31 and the second connecting portion 32 respectively spline the output gear O and the ring gear r1 of the first planetary gear device P1, and the output gear O and the ring gear r2 of the second planetary gear device P2. The spline engaging portion is engaged and connected. Here, the first connecting portion 31 is provided at one end in the axial direction with respect to the output gear main body o1 in the extension shaft portion o2, and the second connection is provided at the end on the other axial side with respect to the output gear main body o1. A connecting portion 32 is provided. Specifically, on the output gear O side, spline engagement grooves constituting the first connecting portion 31 and the second connecting portion 32 are formed on the outer peripheral surfaces of the small diameter portions at both ends in the axial direction of the extending shaft portion o2. Yes. Further, the inner peripheral surface of the boss portion of the first output connecting member 33 extended radially inward from the ring gear r1 of the first planetary gear device P1 and the radially inner side from the ring gear r2 of the second planetary gear device P2. Similarly, spline engagement grooves constituting the first connection portion 31 and the second connection portion 32 are formed on the inner peripheral surface of the boss portion of the second output connection member 34 that has been brought out. As a result of the engagement of these spline engagement grooves, the ring gear r1 of the first planetary gear device P1 and the ring gear r2 of the second planetary gear device P2 are provided at both axial ends of the extended shaft portion o2 of the output gear O. Are coupled so as to rotate together.

  The first connecting portion 31 is disposed closer to the first planetary gear device P1 than the first output bearing 11 on the first planetary gear device P1 side with respect to the output gear O. Accordingly, the first output connecting member 33 and the ring gear r1 of the first planetary gear device P1 are connected to the output gear O from the first intermediate gear wall P1 and the first output bearing 11 from the first planetary gear device P1 side. Is possible. Similarly, the 2nd connection part 32 is arrange | positioned with respect to the output gear O at the 2nd planetary gear apparatus P2 side rather than the 2nd output bearing 12 by the side of the 2nd planetary gear apparatus P2. Thus, the second output connecting member 34 and the ring gear r2 of the second planetary gear device P2 are connected to the output gear O from the second planetary gear device P2 side with respect to the second intermediate support wall d2 and the second output bearing 12. Is possible.

  Therefore, in the hybrid drive device H according to the present embodiment, the first planetary gear device P1 and the first motor / generator MG1 are connected to the first connecting portion 31 from one side in the axial direction with the output gear O supported by the case DC. Is assembled, and the second planetary gear device P2 and the second motor / generator MG2 are assembled to the second connecting portion 32 from the other axial side. Here, the extension shaft portion o2 of the output gear O is supported on the first intermediate support wall d1 via the first output bearing 11 on one side in the axial direction, and via the second output bearing 12 on the other side in the axial direction. The output gear O is supported by the case DC by being supported by the second intermediate support wall d2. In this state, the first connecting portion 31 of the extending shaft portion o2 is disposed so as to protrude to the first planetary gear device P1 side relative to the first output bearing 11 supported by the first intermediate support wall d1. The two connecting portions 32 are arranged so as to protrude to the second planetary gear device P2 side from the second output bearing 12 supported by the second intermediate support wall d2.

  Therefore, the first planetary gear device P1 and the first motor / generator MG1, and the second planetary gear device P2 and the second motor from both sides in the axial direction with respect to the first connection portion 31 and the second connection portion 32, respectively. -Generator MG2 is assembled. More specifically, first, the ring gear r1 of the first planetary gear device P1 is connected to the first connecting portion 31 from one side in the axial direction. Specifically, the first gear connected to the ring gear r1 with respect to the spline engaging groove of the first connecting portion 31 on the output gear O side protruding from the first output bearing 11 to the first planetary gear device P1 side. The spline engaging grooves on the output connecting member 33 side are engaged to be connected. After that, the first subunit in which the carrier ca1 and the sun gear s1 of the first planetary gear set P1 and the first rotor Ro1 of the first motor / generator MG1 connected to the sun gear s1 are assembled in advance is It is assembled to the ring gear r1 of the first planetary gear device P1 from the side. Similarly, the ring gear r2 of the second planetary gear device P2 is connected to the second connecting portion 32 from the other side in the axial direction. Specifically, the second spline engaging groove of the second connecting portion 32 on the output gear O side protruding from the second output bearing 12 to the second planetary gear device P2 side is connected to the ring gear r2. The spline engaging groove on the output connecting member 34 side is engaged to be connected. After that, the second sub-unit in which the carrier ca2 and the sun gear s2 of the second planetary gear device P2 and the second rotor Ro2 of the second motor / generator MG2 connected to the sun gear s2 are assembled in advance is the other in the axial direction. It is assembled to the ring gear r2 of the second planetary gear device P2 from the side.

  Thus, the 1st connection part 31 is arrange | positioned in the 1st planetary gear apparatus P1 side rather than the 1st output bearing 11, and the 2nd connection part 32 is arrange | positioned in the 2nd planetary gear apparatus P2 side rather than the 2nd output bearing 12. As a result, the subunits can be assembled from both sides to the output gear O supported by the case DC. Thereby, the hybrid drive device H according to the present embodiment can simplify the manufacturing process.

1-2-3. Input shaft, fixed shaft The input shaft I is a shaft for transmitting the rotational driving force of the engine to the carrier ca1, and is connected to the engine on one side in the axial direction and the carrier of the first planetary gear device P1 on the other side in the axial direction. It is connected to ca1. The input shaft I passes through a first end support wall d4 that is an end wall on one side in the axial direction of the case DC and is inserted into the case DC. Further, the input shaft I is a through shaft that penetrates the radially inner side of the sun gear s1 of the first planetary gear device P1. That is, the input shaft I passes through the first sun gear through hole 41 provided in the shaft center portion of the sun gear s1, and is supported by the case DC on both sides in the axial direction with respect to the first planetary gear device P1. Here, the input shaft I is supported by the case DC in a state of being rotatable via the first input bearing 13 on one side in the axial direction with respect to the first planetary gear device P1, and with respect to the first planetary gear device P1. It is supported by the case DC so as to be rotatable via the second input bearing 14 on the other side in the axial direction. In the illustrated example, needle bearings capable of relatively reducing the radial thickness are used as the first input bearing 13 and the second input bearing 14.

  In the present embodiment, the case DC includes a first end support wall d4 disposed on one side in the axial direction with respect to the first motor / generator MG1. The first input bearing 13 is supported by the first end support wall d4. The first end support wall d4 includes a boss-shaped (cylindrical) axial protrusion d4a that protrudes toward the first motor / generator MG1 in the axial direction around the input shaft I, and the axial protrusion d4a. The first input bearing 13 is supported on the radially inner side. The input shaft I is rotatably supported by the first end support wall d4 via the first input bearing 13. More specifically, the input shaft I is provided via a first input bearing 13 provided between the inner peripheral surface of the axial protrusion d4a of the first end support wall d4 and the outer peripheral surface of the input shaft I. It is supported by the first end support wall d4 of the case DC.

  Further, one end portion of the input shaft I, here, the other end portion of the input shaft I in the axial direction is supported by the case DC via the output gear O. Specifically, the other axial end of the input shaft I is inserted into a shaft insertion hole o3 provided in the shaft center portion of the output gear O, and the inner peripheral surface of the shaft insertion hole o3 and the input shaft I. It is rotatably supported by the inner peripheral surface of the shaft insertion hole o3 via the second input bearing 14 disposed between the outer peripheral surface and the outer peripheral surface. As described above, the shaft insertion hole o3 of the output gear O is provided in the shaft center portion of the extending shaft portion o2, and the outer surface of the extending shaft portion o2 is provided via the output bearings 11 and 12 in the case. The first intermediate support wall d1 or the second intermediate support wall d2 of the DC is rotatably supported. Further, as shown in the figure, the first output bearing 11 that supports one side in the axial direction of the extending shaft portion o2 overlaps the second input bearing 14 in the axial direction on the radially outer side of the second input bearing 14. Placed in position. As a result, the other axial end of the input shaft I is connected to the first intermediate support wall d1 of the case DC via the second input bearing 14, the extended shaft portion o2 of the output gear O, and the first output bearing 11. Is rotatably supported.

  The fixed shaft F is a shaft as a non-rotating member for fixing the carrier ca2 of the second planetary gear device P2 to the case DC, and is connected to the carrier ca2 of the second planetary gear device P2 on one side in the axial direction. The other side of the direction is connected to the case DC. The fixed shaft F is a through shaft that penetrates the radially inner side of the sun gear s2 of the second planetary gear device P2. That is, the fixed shaft F passes through the second sun gear through hole 42 provided in the shaft center portion of the sun gear s2, and is supported by the case DC on both sides in the axial direction with respect to the second planetary gear device P2. In the present embodiment, the fixed shaft F is supported in a non-rotatable state with respect to the case DC on the other axial side with respect to the second planetary gear device P2, and is axially directed with respect to the second planetary gear device P2. On one side, it is supported by the case DC so as to be rotatable relative to the output gear O via a fixed bearing 15. In the illustrated example, a needle bearing capable of relatively reducing the radial thickness is used as the fixed bearing 15.

  In the present embodiment, the case DC includes a second end support wall d5 disposed on the other axial side with respect to the second motor / generator MG2. The fixed shaft F is directly supported by the second end support wall d5. Here, the fixed shaft F and the second end support wall d5 are connected by a spline engaging portion. Specifically, the second end support wall d5 includes a boss-shaped (cylindrical) axial protrusion d5a that protrudes toward the second motor / generator MG2 in the axial direction around the fixed shaft F. Spline engagement grooves are formed on the inner peripheral surface of the axial protrusion d5a. Spline engagement grooves are also formed on the outer peripheral surface of the other end portion in the axial direction of the fixed shaft F. The fixed shaft F is fixedly supported in a non-rotatable state with respect to the second end support wall d5 by the engagement of these spline engaging grooves.

  Further, one end portion of the fixed shaft F, here, one end portion of the fixed shaft F in the axial direction is supported by the case DC via the output gear O. Specifically, the end of one side of the fixed shaft F in the axial direction is inserted into a shaft insertion hole o3 provided in the shaft center portion of the output gear O, and the inner peripheral surface of the shaft insertion hole o3 and the fixed shaft F It is rotatably supported by the inner peripheral surface of the shaft insertion hole o3 through a fixed bearing 15 disposed between the outer peripheral surface and the outer peripheral surface. As described above, the shaft insertion hole o3 of the output gear O is provided in the shaft center portion of the extending shaft portion o2, and the outer surface of the extending shaft portion o2 is provided via the output bearings 11 and 12 in the case. The first intermediate support wall d1 or the second intermediate support wall d2 of the DC is rotatably supported. Further, as shown in the figure, the second output bearing 12 that supports the other axial side of the extended shaft portion o <b> 2 is disposed on the radially outer side of the fixed bearing 15 at a position overlapping the fixed bearing 15 in the axial direction. ing. As a result, the end portion on the one axial side of the fixed shaft F rotates to the second intermediate support wall d2 of the case DC via the fixed bearing 15, the extended shaft portion o2 of the output gear O, and the second output bearing 12. Supported as possible.

  As described above, in the present embodiment, the input shaft I as the penetrating shaft is directly supported by the case DC via the bearing on one side in the axial direction with respect to the first planetary gear device P1, and the other in the axial direction. On the side, in addition to the bearing, it is indirectly supported by the case DC via the extended shaft portion o2 of the output gear O. On the other hand, the fixed shaft F as the penetrating shaft is directly supported by the case DC without a bearing on the other side in the axial direction (the one axial direction in the present invention) with respect to the second planetary gear device P2. On one side in the direction, it is indirectly supported by the case DC via the extended shaft portion o2 of the output gear O in addition to the bearing. Here, the state in which the input shaft I or the fixed shaft F is directly supported by the case DC means that the input shaft I or the fixed shaft F is supported so as to be in direct contact with the case DC or supported only through a bearing. It means the state to be done. On the other hand, the state in which the input shaft I or the fixed shaft F is indirectly supported by the case DC is a member other than the bearing (in this example, the output gear O) between the input shaft I or the fixed shaft F and the case DC. It means a state in which the case DC is made via the extended shaft portion o2).

  In the present embodiment, the pump drive shaft 61 is connected to the end of the input shaft I on the other axial side. The pump drive shaft 61 is connected to the input shaft I at one end in the axial direction and passes through a through hole provided in the shaft center portion of the fixed shaft F. It is connected to the rotor of the oil pump 62 provided on the second end support wall d5 of the case DC. A flow path through which oil discharged from the oil pump 62 flows is formed in the axial center portion of the pump drive shaft 61 so as to penetrate in the axial direction. The oil pump 62 has a pump chamber formed between a side surface (outer surface) on the other side in the axial direction of the second end support wall d5 and a pump cover 63 attached so as to face the side surface. The rotor is arranged in the room.

1-2-4. Motor / Generator The first motor / generator MG1 is on the one side in the axial direction with respect to the output gear O, and is radially outside the first planetary gear unit P1 that is also arranged on the one side in the axial direction with respect to the output gear O. Is arranged. The first stator St1 of the first motor / generator MG1 is fixed to the inner peripheral surface of the case peripheral wall d3 of the case DC. The first rotor Ro1 is integrally connected to the sun gear s1 of the first planetary gear device P1 through the first rotor connecting member 51, and the radial direction of the first planetary gear device P1 by the first rotor connecting member 51. Supported on the outside.

  The first rotor connecting member 51 is a member provided so as to extend radially inward from the first rotor Ro1. In the present embodiment, the first rotor connecting member 51 is disposed along the radial direction and is disposed at the radial center portion. The disk-shaped member is formed with a circular hole. The first rotor connecting member 51 is disposed adjacent to the first planetary gear device P1 on the side opposite to the second planetary gear device P2 side (one side in the axial direction, the right side in FIG. 1). The first rotor Ro1 is fixed to the radially outer end of the first rotor connecting member 51, and the sun gear s1 of the first planetary gear device P1 is fixed to the radially inner end. At this time, the first rotor connecting member 51 is fixed to the first axial end of the first rotor Ro1 and the first axial end of the sun gear s1, respectively. Further, in the present embodiment, the first rotor connecting member 51 is integrally provided with a cylindrical portion 51a that protrudes in the axial direction from the disk-shaped member in order to support the inner peripheral surface of the first rotor Ro1. It is made into a shape. Here, the cylindrical portion 51a is provided so as to protrude to the first planetary gear device P1 side (the other side in the axial direction, the left side in FIG. 1), and the inner peripheral surface of the first rotor Ro1 is in contact with the outer peripheral surface thereof. .

  As described above, by fixing one axial end of the first rotor Ro1 to the radially outer end of the first rotor connecting member 51, the first rotor Ro1 is disposed radially inward of the first rotor Ro1. A first space SP <b> 1 surrounded by the inner peripheral surface (in this example, the inner peripheral surface of the cylindrical portion 51 a) and the first rotor connecting member 51 is formed. The first space SP1 is a space that opens to the second planetary gear device P2 side (the other side in the axial direction). And all or one part of the 1st planetary gear apparatus P1 is accommodated in this 1st space SP1.

  The first rotor Ro1 of the first motor / generator MG1 is rotatably supported at two positions in the axial direction. One of the two positions is supported by the case DC, and the other is the first rotor Ro1. Is supported by the input shaft I on the radially inner side of the sun gear s1 of the first planetary gear unit P1. In the present embodiment, the first rotor Ro1 is rotatably supported by the first end support wall d4 of the case DC via the first rotor bearing 16 at the support portion on one axial side, and on the other axial side. The support portion is rotatably supported by the input shaft I via the third rotor bearing 18 on the radially inner side of the sun gear s1. In the illustrated example, a ball bearing capable of supporting a relatively large load is used as the first rotor bearing 16. On the other hand, as the third rotor bearing 18, a needle bearing capable of relatively reducing the radial thickness is used.

  In the present embodiment, the first rotor connecting member 51 has a boss shape (cylindrical shape) protruding in the axial direction from the disk-like member in order to support the first rotor connecting member 51 and the first rotor Ro1 on the case DC. Shape) is integrally provided with a protruding portion 51b in the axial direction. Here, the axial protruding portion 51b is provided so as to protrude on the opposite side (one axial direction side, the right side in FIG. 1) from the first planetary gear device P1. And the 1st rotor bearing 16 is provided so that the internal peripheral surface of this axial direction protrusion part 51b may be supported. The first rotor bearing 16 is provided on the outer side in the radial direction of the axial protrusion d4a of the first end support wall d4 described above. In this example, the first rotor bearing 16 is supported on the outer peripheral surface of the axial protrusion d4a of the first end support wall d4. That is, the first rotor Ro1 includes the first rotor coupling member 51, the inner circumferential surface of the axial projection 51b of the first rotor coupling member 51, and the outer circumferential surface of the axial projection d4a of the first end support wall d4. The first end bearing wall d4 of the case DC is rotatably supported via a first rotor bearing 16 provided between the first and second rotors.

  As described above, the first input bearing 13 for supporting the input shaft I is provided on the radially inner side of the axial protrusion d4a provided on the first end support wall d4 of the case DC. Therefore, in the present embodiment, the first input bearing 13 provided on the radially inner side of the axial projecting portion d4a of the first end support wall d4 and the radially outer side of the axial projecting portion d4a are provided. The first rotor bearing 16 is disposed so as to overlap in the axial direction. In the illustrated example, the first input bearing 13 and the first rotor bearing 16 are arranged coaxially with the axial protrusion d4a interposed therebetween in the radial direction, and are arranged so as to partially overlap in the axial direction. In the present embodiment, a first rotation sensor 53 that detects the rotational position of the first rotor Ro <b> 1 is disposed on the radially outer side of the axial protrusion 51 b of the first rotor connecting member 51. Specifically, a resolver or the like is used as the first rotation sensor 53. And the rotor of the 1st rotation sensor 53 is fixed to the outer peripheral surface of the axial direction protrusion part 51b of the 1st rotor connection member 51, and the surface at the side of the 1st motor generator MG1 in the 1st end part support wall d4 of case DC. The first rotation sensor 53 has a stator fixed thereto. Here, the axial protrusion 51b of the first rotor coupling member 51 overlaps with the axial protrusion d4a of the first rotor bearing 16, the first input bearing 13, and the first end support wall d4 in the axial direction. Has been placed. Therefore, in the present example, the first rotation sensor 53 is also disposed so as to overlap with these in the axial direction. Also, the first rotor bearing 16, the first input bearing 13, the axial protrusion d4a of the first end support wall d4, and the axial protrusion of the first rotor connecting member 51, which are arranged so as to overlap each other in the axial direction. The part 51b and the first rotation sensor 53 are disposed so as to overlap with the first stator St1 of the first motor / generator MG1 in the axial direction. In this example, these are disposed so as to overlap with the coil end protruding in the axial direction from the core of the first stator St1 in the axial direction. With such an arrangement, it is possible to keep the axial dimension of the hybrid drive device H small.

  Further, the first rotor Ro1 of the first motor / generator MG1 is supported by the input shaft I on the radially inner side of the sun gear s1 of the first planetary gear device P1 in the other axial support portion. Specifically, the sun gear s1 of the first planetary gear device P1 is provided between the inner peripheral surface of the first sun gear through hole 41 provided in the shaft center portion of the sun gear s1 and the outer peripheral surface of the input shaft I. The third rotor bearing 18 supports the input shaft I. The first rotor Ro1 is integrally connected and supported via the first rotor connecting member 51 to the sun gear s1 of the first planetary gear device P1 rotatably supported by the input shaft I in this way. In other words, the first rotor Ro1 is rotatably supported on the input shaft I via the first rotor coupling member 51, the sun gear s1 of the first planetary gear device P1, and the third rotor bearing 18. Here, since the sun gear s1 of the first planetary gear unit P1 is disposed on the radially inner side of the first motor / generator MG1, the third rotor bearing 18 that rotatably supports the sun gear s1 is also the first gear. Arranged radially inward of motor generator MG1. Accordingly, the first rotor Ro1 of the first motor / generator MG1 has two positions in the axial direction, that is, a position on one side in the axial direction with respect to the first rotor Ro1 and a position overlapping with the first rotor Ro1 in the axial direction. It is supported by.

  The second motor / generator MG2 is disposed on the other side in the axial direction with respect to the output gear O and on the radially outer side of the second planetary gear device P2 disposed on the other side in the axial direction with respect to the output gear O. ing. The second stator St2 of the second motor / generator MG2 is fixed to the inner peripheral surface of the case peripheral wall d3 of the case DC. The second rotor Ro2 is integrally connected to the sun gear s2 of the second planetary gear device P2 via the second rotor connecting member 52, and the radial direction of the second planetary gear device P2 by the second rotor connecting member 52. Supported on the outside.

  The second rotor connecting member 52 is a member provided so as to extend radially inward from the second rotor Ro2, and in the present embodiment, the second rotor connecting member 52 is disposed along the radial direction and is disposed at the central portion in the radial direction. The disk-shaped member is formed with a circular hole. The second rotor connecting member 52 is disposed adjacent to the second planetary gear device P2 on the opposite side to the first planetary gear device P1 side (the other side in the axial direction, the left side in FIG. 1). The second rotor Ro2 is fixed to the radially outer end of the second rotor connecting member 52, and the sun gear s2 of the second planetary gear device P2 is fixed to the radially inner end. At this time, the second rotor connecting member 52 is fixed to the second axial end of the second rotor Ro2 and the second axial end of the sun gear s2. Further, in the present embodiment, the second rotor connecting member 52 is integrally provided with a cylindrical portion 52a that protrudes in the axial direction from the disk-like member in order to support the inner peripheral surface of the second rotor Ro2. It is made into a shape. Here, the cylindrical portion 52a is provided so as to protrude to the second planetary gear unit P2 side (one side in the axial direction, the right side in FIG. 1), and the inner peripheral surface of the second rotor Ro2 is in contact with the outer peripheral surface thereof. .

  As described above, by fixing the other axial end of the second rotor Ro2 to the radially outer end of the second rotor connecting member 52, the second rotor Ro2 is disposed radially inward of the second rotor Ro2. A second space SP2 surrounded by the inner peripheral surface (in this example, the inner peripheral surface of the cylindrical portion 52a) and the second rotor connecting member 52 is formed. The second space SP2 is a space that opens to the first planetary gear device P1 side (one axial direction side). And all or a part of 2nd planetary gear apparatus P2 is accommodated in this 2nd space SP2.

  The second rotor Ro2 of the second motor / generator MG2 is rotatably supported at two positions in the axial direction, one of the two positions being supported by the case DC, and the other being the second rotor Ro2. Is supported on the fixed shaft F on the radially inner side of the sun gear s2 of the second planetary gear set P2. In the present embodiment, the second rotor Ro2 is rotatably supported on the second end support wall d5 of the case DC via the second rotor bearing 17 in the support portion on the other side in the axial direction. The support portion is rotatably supported by the fixed shaft F via the fourth rotor bearing 19 on the radially inner side of the sun gear s2. In the illustrated example, a ball bearing capable of supporting a relatively large load is used as the second rotor bearing 17. On the other hand, as the fourth rotor bearing 19, a needle bearing capable of relatively reducing the radial thickness is used.

  In the present embodiment, the second rotor connecting member 52 has a boss shape (cylindrical shape) that protrudes in the axial direction from the disk-like member in order to support the second rotor connecting member 52 and the second rotor Ro2 on the case DC. Shape) is integrally provided with an axial protrusion 52b. Here, the axial protrusion 52b is provided so as to protrude on the opposite side (the other axial side, the left side in FIG. 1) from the second planetary gear device P2. And the 2nd rotor bearing 17 is provided so that the internal peripheral surface of this axial direction protrusion part 52b may be supported. The second rotor bearing 17 is provided on the outer side in the radial direction of the axial protrusion d5a of the second end support wall d5 described above. In this example, the second rotor bearing 17 is supported on the outer peripheral surface of the axial protrusion d5a of the second end support wall d5. That is, the second rotor Ro2 includes the second rotor connecting member 52, the inner peripheral surface of the axial protruding portion 52b of the second rotor connecting member 52, and the outer peripheral surface of the axial protruding portion d5a of the second end support wall d5. The second end support wall d5 of the case DC is rotatably supported via a second rotor bearing 17 provided between the first and second rotors.

  In the present embodiment, a second rotation sensor 54 that detects the rotational position of the second rotor Ro <b> 2 is disposed outside the radial protrusion 52 b of the second rotor connecting member 52 in the radial direction. Specifically, a resolver or the like is used as the second rotation sensor 54. And the rotor of the 2nd rotation sensor 54 is fixed to the outer peripheral surface of the axial direction protrusion part 52b of the 2nd rotor connection member 52, and the 2nd motor generator MG2 side surface in the 2nd end part support wall d5 of case DC. In addition, the stator of the second rotation sensor 54 is fixed. Here, the axial protrusion 52b of the second rotor connecting member 52 is disposed so as to overlap the second rotor bearing 17 and the axial protrusion d5a of the second end support wall d5 in the axial direction. Therefore, in this example, the second rotation sensor 54 is also disposed so as to overlap with these in the axial direction. Further, the second rotor bearing 17, the axial protrusion d 5 a of the second end support wall d 5, the axial protrusion 52 b of the second rotor connecting member 52, and the second, which are arranged so as to overlap each other in the axial direction, The rotation sensor 54 is arranged to overlap the second stator St2 of the second motor / generator MG2 in the axial direction. In the present example, these are disposed so as to overlap in the axial direction with the coil ends protruding from the core of the second stator St2 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 H small.

  Further, the second rotor Ro2 of the second motor / generator MG2 is supported by the fixed shaft F on the radially inner side of the sun gear s2 of the second planetary gear device P2 in the support portion on one axial side. Specifically, the sun gear s2 of the second planetary gear device P2 is provided between the inner peripheral surface of the second sun gear through hole 42 provided in the shaft center portion of the sun gear s2 and the outer peripheral surface of the fixed shaft F. Further, it is supported by the fixed shaft F via the fourth rotor bearing 19. The second rotor Ro2 is integrally connected and supported via the second rotor connecting member 52 to the sun gear s2 of the second planetary gear device P2 rotatably supported on the fixed shaft F in this way. In other words, the second rotor Ro2 is rotatably supported by the fixed shaft F via the second rotor connecting member 52, the sun gear s2 of the second planetary gear device P2, and the fourth rotor bearing 19. Here, since the sun gear s2 of the second planetary gear device P2 is arranged on the radially inner side of the second motor / generator MG2, the fourth rotor bearing 19 that rotatably supports the sun gear s2 is also second. Arranged radially inside motor generator MG2. Accordingly, the second rotor Ro2 of the second motor / generator MG2 has two positions in the axial direction, that is, the position on the other side in the axial direction with respect to the second rotor Ro2 and the position overlapping the second rotor Ro2 in the axial direction. It is supported by.

  In the hybrid drive device H, as described above, the first rotor Ro1 of the first motor / generator MG1 is arranged on the radially outer side of the first planetary gear device P1, and the first rotor connecting member 51 is connected to the first planetary gear device. The second rotor Ro2 of the second motor / generator MG2 is disposed on the outer side in the radial direction of the second planetary gear device P2, and is disposed adjacent to the opposite side of the second planetary gear device P2 with respect to P1. The two-rotor connecting member 52 is disposed adjacent to the second planetary gear device P2 on the side opposite to the first planetary gear device P1 side. As a result, the first space SP1 that is formed on the radially inner side of the first motor / generator MG1 and accommodates the first planetary gear device P1, and the second planetary gear that is formed on the radially inner side of the second motor / generator MG2 is formed. The second space SP2 that accommodates the device P2 is formed so as to open to the sides facing each other in the axial direction. In other words, the first space SP1 surrounded by the inner peripheral surface of the first rotor Ro1 (in this example, the inner peripheral surface of the cylindrical portion 51a) and the first rotor connecting member 51, and the inner peripheral surface of the second rotor Ro2 (this In the example, the first rotor Ro1 and the first rotor connecting member are so opened that the second space SP2 surrounded by the inner peripheral surface of the cylindrical portion 52a and the second rotor connecting member 52 opens to the output gear O side. 51, and the second rotor Ro2 and the second rotor connecting member 52 are disposed.

  Further, as described above, the first rotor bearing 16 that rotatably supports the first rotor Ro1 is disposed on the outer peripheral surface of the axially projecting portion d4a of the first end support wall d4. It is provided so as to support the inner peripheral surface of the axially protruding portion 51b formed to protrude in the axial direction. The second rotor bearing 17 that rotatably supports the second rotor Ro2 is disposed on the outer peripheral surface of the axially protruding portion d5a of the second end support wall d5 and protrudes in the axial direction from the second rotor connecting member 52. It is provided so as to support the inner peripheral surface of the formed axial protrusion 2b. On the other hand, the pair of output bearings 11 and 12 are provided to support the outer peripheral surface of the extending shaft portion o2 of the output gear O. By arranging the bearings 11, 12, 16, and 17 in this way, the input shaft I or the fixed shaft F that is supported on the radially inner side of the first rotor Ro 1, the output gear O, and the second rotor Ro 2 can be appropriately configured. It is possible to arrange the bearings of the first rotor Ro1, the output gear O, and the second rotor Ro2 so as not to interfere with the bearings supporting the input shaft I or the fixed shaft F while supporting them, and appropriately support each of them. It is possible. In addition, since the pair of rotor bearings 16 and 17 and the pair of output bearings 11 and 12 can be easily arranged to have the same diameter, by sharing these as the same parts having the same diameter, It is possible to reduce the number and reduce the cost.

1-2-5. Planetary Gear Device The first planetary gear device P1 is arranged on the radially inner side of the first motor / generator MG1 so as to overlap the first motor / generator MG1 in the axial direction. Accordingly, the first planetary gear device P1 is arranged on one axial side (the right side in FIG. 1) with respect to the output gear O, similarly to the first motor / generator MG1. In the illustrated example, the first planetary gear device P1 is disposed so as to partially overlap the first rotor Ro1 and the first stator St1 of the first motor / generator MG1.

  The sun gear s <b> 1 of the first planetary gear device P <b> 1 is connected to the first rotor Ro <b> 1 via the first rotor connecting member 51. As described above, the first rotor connecting member 51 is disposed adjacent to the first planetary gear device P1 on the side opposite to the second planetary gear device P2 side (one side in the axial direction). Accordingly, the sun gear s1 of the first planetary gear device P1 is connected to the first rotor connecting member 51 at the end opposite to the second planetary gear device P2 (on the one side in the axial direction). The carrier ca1 of the first planetary gear device P1 is connected to the input shaft I on the second planetary gear device P2 side (the other side in the axial direction) with respect to the pinion gear. In the illustrated example, a carrier ca1 is formed on a flange portion i1 integrally formed so as to protrude from the outer peripheral surface of the input shaft I at a position on the second planetary gear device P2 side (the other side in the axial direction) with respect to the pinion gear. It is fixed integrally. Thrust bearings 20 for supporting an axial load acting on the sun gear s1 and the ring gear r1 of the first planetary gear device P1 are disposed on both axial sides of the flange part i1.

  The ring gear r1 of the first planetary gear device P1 is connected to the output gear O via the first output connecting member 33. As described above, the first output connecting member 33 is disposed adjacent to the second planetary gear device P2 side (the other side in the axial direction) with respect to the first planetary gear device P1. Therefore, the ring gear r1 of the first planetary gear device P1 is connected to the first output connecting member 33 at the end on the second planetary gear device P2 side (the other side in the axial direction). In this example, the ring gear r1 and the first output connecting member 33 are connected by spline engagement. The ring gear r1 of the first planetary gear device P1 is connected to the first connecting portion 31 provided at the end on the one axial side of the extended shaft portion o2 of the output gear O via the first output connecting member 33. Has been.

  The second planetary gear device P2 is arranged on the radially inner side of the second motor / generator MG2 so as to overlap the second motor / generator MG2 in the axial direction. Accordingly, the second planetary gear device P2 is disposed on the other axial side (the left side in FIG. 1) with respect to the output gear O, similarly to the second motor / generator MG2. In the illustrated example, the entire second planetary gear device P2 is arranged so as to overlap the second rotor Ro2 and the second stator St2 of the second motor / generator MG2.

  The sun gear s <b> 2 of the second planetary gear device P <b> 2 is connected to the second rotor Ro <b> 2 via the second rotor connecting member 52. As described above, the second rotor connecting member 52 is disposed adjacent to the second planetary gear device P2 on the side opposite to the first planetary gear device P1 side (the other side in the axial direction). Therefore, the sun gear s2 of the second planetary gear device P2 is connected to the second rotor connecting member 52 at the end opposite to the first planetary gear device P1 (on the other side in the axial direction). The carrier ca2 of the second planetary gear device P2 is connected to the fixed shaft F on the first planetary gear device P1 side (one axial direction side) with respect to the pinion gear. In the illustrated example, a carrier ca2 is formed on a flange portion f1 integrally formed so as to protrude from the outer peripheral surface of the fixed shaft F at a position on the first planetary gear device P1 side (one axial direction side) with respect to the pinion gear. It is fixed integrally. Thrust bearings 21 for supporting an axial load acting on the sun gear s2 and the ring gear r2 of the second planetary gear device P2 are disposed on both axial sides of the flange portion f1.

  The ring gear r2 of the second planetary gear device P2 is connected to the output gear O via the second output connecting member 34. As described above, the second output connecting member 34 is disposed adjacent to the first planetary gear device P1 side (one axial direction side) with respect to the second planetary gear device P2. Therefore, the ring gear r2 of the second planetary gear device P2 is connected to the second output connecting member 34 at the end portion on the first planetary gear device P1 side (one axial side). In this example, the ring gear r2 and the second output connecting member 34 are connected by spline engagement. Then, the ring gear r2 of the second planetary gear device P2 is connected to the second connecting portion 32 provided at the other end in the axial direction of the extending shaft portion o2 of the output gear O via the second output connecting member 34. Has been. In the present embodiment, the second planetary gear device P2 has a size that is slightly larger in the axial direction and the radial direction than the first planetary gear device P1.

2. Second Embodiment Next, a hybrid drive device H according to a second embodiment of the present invention will be described with reference to the drawings. 4 is a cross-sectional view of the main part of the hybrid drive device H, and FIG. 5 is an overall cross-sectional view of the hybrid drive device H. As shown in these drawings, the hybrid drive device H according to this embodiment is a case as an output gear O and a non-rotating member for each rotating element of the second planetary gear device P2 as compared with the first embodiment. The DC connection relationship is different. Accordingly, the hybrid drive apparatus H according to this embodiment does not include the fixed shaft F in the first embodiment, and the support structure for the input shaft I is also different from that in the first embodiment. On the other hand, the configuration of the hybrid drive device H on the one side in the axial direction (the right side in FIG. 4) of the output gear O with respect to the output gear main body o1 is the same as in the first embodiment. Hereinafter, the hybrid drive device H according to the present embodiment will be described focusing on differences from the first embodiment. Note that points not particularly described are the same as those in the first embodiment.

  The second planetary gear unit P2 is configured by a single pinion type planetary gear mechanism as in the first embodiment, and the sun gear s2 of the second planetary gear unit P2 is the second motor / generator MG2. The two rotors Ro2 are connected to rotate integrally. On the other hand, in the present embodiment, the carrier ca2 of the second planetary gear device P2 is connected to rotate integrally with the output gear O. The ring gear r2 is connected to a case DC as a non-rotating member and fixed so as not to rotate. Therefore, in the present embodiment, the sun gear s2 corresponds to the “first rotating element” of the second planetary gear device P2 in the present invention, and the ring gear r2 is the “second rotating element” of the second planetary gear device P2 in the present invention. The carrier ca2 corresponds to the “third rotating element” of the second planetary gear device P2 in the present invention. In this embodiment, since the connection relationship between the rotating elements of the second planetary gear device P2 is as described above, the output gear O is used as the output rotating element of the first planetary gear device P1 on one side in the axial direction. Although it is connected to the ring gear r1, it is connected to the carrier ca2 as the output rotation element of the second planetary gear device P2 on the other side in the axial direction.

  FIG. 6 is a velocity diagram showing an operation state of the first planetary gear device P1 and the second planetary gear device P2 during travel of the vehicle. The method for describing these velocity diagrams is the same as in the first embodiment. As indicated by a straight line L1 in FIG. 6, the operation of each part related to the first planetary gear device P1 is the same as that in the first embodiment. On the other hand, the second planetary gear device P2 has the same function for reducing the rotation of the second motor / generator MG2 and transmitting it to the output gear O as shown by the straight line L2 in FIG. The method is different from the first embodiment. That is, in the second planetary gear device P2, the ring gear r2 that is one end in the order of the rotation speed in the second planetary gear device P2 is fixed to the case DC, and the rotation speed is zero. In this case, the rotation of the sun gear s2 which is the other end in the order of the rotation speed is decelerated according to the gear ratio of the second planetary gear device P2, and is transmitted to the carrier ca2 which is intermediate in the order of the rotation speed. As a result, the second planetary gear set P2 decelerates the rotation of the second motor / generator MG2 coupled to the sun gear s2, and transmits it to the output gear O coupled to the carrier ca2. Then, the second motor / generator MG2 appropriately corrects the driving force distributed from the first planetary gear unit P1 to the output gear O according to the required driving force from the vehicle side, the traveling state of the vehicle, and the like. Outputs torque in the direction or negative direction. In addition, according to the configuration of the second planetary gear device P2 according to the present embodiment, it is possible to increase the reduction ratio when the rotation of the second motor / generator MG2 is decelerated as compared with the first embodiment. It is. Therefore, in this example, as shown in FIG. 4, the second motor / generator MG2 has a smaller physique than the first embodiment (see FIG. 1), and specifically has a smaller axial dimension. Things are used.

  Also in the present embodiment, the output gear O is disposed between the first planetary gear device P1 and the second planetary gear device P2 in the axial direction, and the output gear body o1 meshes with the counter driven gear cr2 of the counter reduction mechanism CR. And an extending shaft portion o2 that extends to both sides in the axial direction with respect to the output gear main body o1 and has a smaller diameter than the output gear main body o1. However, the input shaft I is disposed so as to pass through a shaft insertion hole o3 that is a through hole provided in the axial center portion of the extending shaft portion o2 of the output gear O. That is, in the present embodiment, the shaft end portion such as the input shaft I is not rotatably supported in the shaft insertion hole o3, and the input shaft I only passes through the shaft insertion hole o3. It becomes the composition of.

  In the present embodiment, the second connecting portion 32 provided on the other axial side of the extending shaft portion o2 of the output gear O is connected to the carrier ca2 of the second planetary gear device P2. That is, the output gear O is configured as a separate component from the carrier ca2 of the second planetary gear device P2, and rotates integrally with the ring gear r2 of the second planetary gear device P2 via the second coupling portion 32 on the other axial side. It is connected to. In the present embodiment, the carrier ca2 of the second planetary gear device P2 is directly connected to the output gear O. That is, the carrier ca2 of the second planetary gear device P2 extends radially inward from the shaft member of the pinion gear on the first planetary gear device P1 side (one axial direction side) with respect to the second planetary gear device P2. It is formed to be. And the boss | hub part is formed in the radial direction center part in the part extended toward the radial inside of this carrier ca. The output gear O is connected to the boss portion via the second connecting portion 32. Thus, the carrier ca2 of the second planetary gear device P2 is directly connected to the second connecting portion 32.

  Also in the present embodiment, the second connecting portion 32 is a spline engaging portion that connects the output gear O and the carrier ca2 of the second planetary gear device P2 by spline engagement. Specifically, on the output gear O side, spline engagement grooves constituting the second connecting portion 32 are formed on the outer peripheral surfaces of the small diameter portions at both ends in the axial direction of the extending shaft portion o2. Further, a spline engagement groove that also constitutes the second connecting portion 32 is formed on the inner peripheral surface of the boss portion provided on the carrier ca2 of the second planetary gear device P2. When these spline engagement grooves are engaged, the carrier ca2 of the second planetary gear device P2 is connected to the end on the other axial side of the extended shaft o2 of the output gear O so as to rotate integrally. Is done. Similarly to the first embodiment, the second connecting portion 32 is disposed on the second planetary gear device P2 side with respect to the output gear O than the second output bearing 12 on the second planetary gear device P2 side.

  Also in this embodiment, the input shaft I is coupled to the carrier ca1 of the first planetary gear device P1 in order to transmit the rotational driving force of the engine to the carrier ca1. Further, the input shaft I is a through shaft that penetrates the radially inner side of the sun gear s1 of the first planetary gear device P1. However, in the present embodiment, not only that, the input shaft I is configured to penetrate the radially inner side of the output gear O and the radially inner side of the sun gear s2 of the second planetary gear device P2. That is, the input shaft I not only penetrates the first sun gear through hole 41 provided in the shaft center portion of the sun gear s1 of the first planetary gear device P1, but also the shaft center of the extension shaft portion o2 of the output gear O. It arrange | positions so that the shaft insertion hole o3 which is a through-hole provided in the part and the 2nd sun gear through-hole 42 provided in the axial center part of the sun gear s2 of the 2nd planetary gear apparatus P2 may be penetrated. The input shaft I has both sides in the axial direction with respect to the first planetary gear device P1 and the second planetary gear device P2, more specifically, one side in the axial direction and the second planetary gear with respect to the first planetary gear device P1. It is supported by the case DC on the other axial side with respect to the device P2. Here, the input shaft I is supported by the case DC while being rotatable via the first input bearing 13 on one side in the axial direction with respect to the first planetary gear device P1, and with respect to the second planetary gear device P2. It is supported by the case DC so as to be rotatable via the second input bearing 14 on the other side in the axial direction. Thereby, in the present embodiment, one end portion of the input shaft I passes through the shaft insertion hole o3 provided in the shaft center portion of the output gear O, and is closer to the second motor / generator MG2 side than the output gear O. The second input bearing 14 arranged is rotatably supported.

  In the present embodiment, the arrangement and support structure of the second input bearing 14 are different from those in the first embodiment. That is, the second input bearing 14 is supported by the second end support wall d5 disposed on the other axial side with respect to the second motor / generator MG2. That is, the second end support wall d5 includes a boss-shaped (cylindrical) axial protrusion d5a that protrudes toward the second motor / generator MG2 in the axial direction around the input shaft I. The second input bearing 14 is supported on the radially inner side of the direction protrusion d5a. The input shaft I is rotatably supported by the second end support wall d5 via the second input bearing 14. More specifically, the input shaft I is connected via a second input bearing 14 provided between the inner peripheral surface of the axial protrusion d5a of the second end support wall d5 and the outer peripheral surface of the input shaft I. It is supported by the second end support wall d5 of the case DC.

  As described above, in the present embodiment, the input shaft I as the penetrating shaft is axially opposite to both the first planetary gear device P1 and the second planetary gear device P2, specifically, the first planetary gear. It is directly supported by the case DC via a bearing on one side in the axial direction with respect to the device P1 and on the other side in the axial direction with respect to the second planetary gear device P2. In the present embodiment, the other axial end of the input shaft I is directly connected to the rotor of the oil pump 62 provided on the second end support wall d5 of the case DC. Therefore, a flow path through which oil discharged from the oil pump 62 flows is formed in the axial center portion of the input shaft I along the axial direction.

  Similar to the first embodiment, the second rotor Ro2 of the second motor / generator MG2 is rotatably supported at two axial positions, and the second rotor Ro2 is a case DC at one of the two positions. It is supported by. On the other hand, in the present embodiment, in the other of the two places, the second rotor Ro2 is disposed so as to penetrate the radial inner side of the sun gear s2 on the radial inner side of the sun gear s2 of the second planetary gear device P2. The input shaft I is supported. That is, the second rotor Ro2 is rotatably supported on the input shaft I via the fourth rotor bearing 19 on the radially inner side of the sun gear s2 at the support portion on one axial direction side. Specifically, the sun gear s2 of the second planetary gear device P2 is provided between the inner peripheral surface of the second sun gear through hole 42 provided in the shaft center portion of the sun gear s2 and the outer peripheral surface of the input shaft I. Further, it is supported by the input shaft I via the fourth rotor bearing 19. The second rotor Ro2 is integrally connected and supported via the second rotor connecting member 52 to the sun gear s2 of the second planetary gear device P2 rotatably supported by the input shaft I in this way. In other words, the second rotor Ro2 is rotatably supported on the input shaft I via the second rotor coupling member 52, the sun gear s2 of the second planetary gear device P2, and the fourth rotor bearing 19.

  As described above, the second input bearing 14 for supporting the input shaft I is provided on the radially inner side of the axial protrusion d5a provided on the second end support wall d5 of the case DC. Therefore, in the present embodiment, the second input bearing 14 provided on the radially inner side of the axial protrusion d5a of the second end support wall d5 and the radially outer side of the axial protrusion d5a are provided. The second rotor bearing 17 is disposed so as to overlap in the axial direction. In the illustrated example, the second input bearing 14 and the second rotor bearing 17 are coaxially arranged with the axial protrusion d5a interposed therebetween in the radial direction, and are arranged so as to partially overlap in the axial direction. In the present embodiment, a second rotation sensor 54 that detects the rotational position of the second rotor Ro2 is disposed on the radially outer side of the axial protrusion 52b of the second rotor coupling member 52. Specifically, the rotor of the second rotation sensor 54 is fixed to the outer peripheral surface of the axial protrusion 52b of the second rotor connecting member 52, and the second motor / generator MG2 on the second end support wall d5 of the case DC. The stator of the second rotation sensor 54 is fixed to the side surface. Here, the axial protrusion 52b of the second rotor connecting member 52 overlaps with the axial protrusion d5a of the second rotor bearing 17, the second input bearing 14, and the second end support wall d5 in the axial direction. Has been placed. Therefore, in this example, the second rotation sensor 54 is also disposed so as to overlap with these in the axial direction. Further, the second rotor bearing 17, the second input bearing 14, the axial protrusion d5a of the second end support wall d5, and the axial protrusion of the second rotor connecting member 52, which are arranged so as to overlap each other in the axial direction. The part 52b and the second rotation sensor 54 are disposed so as to overlap with the second stator St2 of the second motor / generator MG2 in the axial direction. In the present example, these are disposed so as to overlap in the axial direction with the coil ends protruding from the core of the second stator St2 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 H small.

  The second planetary gear device P2 is the same as the first embodiment in that the sun gear s2 is connected to the second rotor Ro2 via the second rotor connecting member 52. On the other hand, the carrier ca2 of the second planetary gear device P2 is connected to the output gear O. The carrier ca2 of the second planetary gear unit P2 is formed to extend radially inward on the first planetary gear unit P1 side (one axial side) with respect to the pinion gear. The carrier ca2 of the second planetary gear device P2 is coupled to a second coupling portion 32 provided at the other axial end of the extended shaft portion o2 of the output gear O. Between the end surface on the other side in the axial direction of the carrier ca2 of the second planetary gear device P2 and the side surface on the one side in the axial direction of the second rotor connecting member 52 connected to the sun gear s2 of the second planetary gear device P2. A thrust bearing 21 for supporting an axial load acting on the sun gear s2 of the second planetary gear device P2 is disposed.

  The ring gear r2 of the second planetary gear device P2 is connected to a case DC as a non-rotating member and is fixed so as not to rotate. In the present embodiment, the ring gear r2 of the second planetary gear device P2 is engaged and fixed to the second intermediate support wall d2 of the case DC. Specifically, the second intermediate support wall d2 includes a boss portion d2b that protrudes toward the second planetary gear device P2 in the axial direction, and a spline engagement groove is formed on the inner peripheral surface of the boss portion d2b. . Spline engagement grooves are also formed on the outer peripheral surface of the end portion on the one axial side of the ring gear r2 of the second planetary gear device P2. The ring gear r2 is fixedly supported in a non-rotatable state with respect to the second intermediate support wall d2 by the engagement of these spline engagement grooves.

3. Other Embodiments (1) In the first embodiment, the first output coupling in which the ring gear r1 of the first planetary gear device P1 is disposed on the second planetary gear device P2 side with respect to the first planetary gear device P1. The ring gear r2 of the second planetary gear device P2 is connected to the output gear O via the member 33, and the second output connecting member 34 is disposed on the first planetary gear device P1 side with respect to the second planetary gear device P2. The configuration connected to the output gear O through the above is described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, like the carrier ca2 of the second planetary gear device P2 according to the second embodiment, the rotation connected to the output gear O of one or both of the first planetary gear device P1 and the second planetary gear device P2. It is also a preferred embodiment of the present invention that the element is directly connected to the output gear O without going through the output connecting member.

(2) In each of the above embodiments, the output gear O is configured as a separate component from the third rotating element of the first planetary gear device P1 and the second planetary gear device P2 to be connected, and the first connecting portion 31 and The configuration connected via the second connecting portion 32 has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, it is also preferable that the output gear O is integrally formed as the same part as one or both of the third rotating element of the first planetary gear device P1 and the third rotating element of the second planetary gear device P2. This is one of the embodiments.

(3) In each of the above embodiments, the first connecting portion 31 and the second connecting portion that connect the output gear O and the third rotating element of the first planetary gear device P1 and the third rotating element of the second planetary gear device P2, respectively. The case where the connecting portion 32 is configured to connect the two members so as to rotate integrally with each other by spline engagement has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, one or both of the first connecting portion 31 and the second connecting portion 32 are configured to connect the two members so as to rotate integrally with each other using a key and a key groove, or are provided on the two members, respectively. It is also a preferred embodiment of the present invention that the formed flange portions are opposed to each other and are fastened and fixed to each other by a fastening member such as a bolt.

(4) In each of the above embodiments, the configuration in which the first connecting portion 31 and the second connecting portion 32 are provided on the outer peripheral surfaces of both end portions of the extending shaft portion o2 of the output gear O has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, the 1st connection part 31 and the 2nd connection part 32 are each provided in the internal peripheral surface of the both ends of the shaft insertion hole o3 provided in the axial center part of the extension shaft part o2 of the output gear O. This is also a preferred embodiment of the present invention.

(5) In each of the above-described embodiments, the first connecting portion 31 is disposed closer to the first planetary gear device P1 than the first output bearing 11, and the second connecting portion 32 is the second planet than the second output bearing 12. The structure arrange | positioned at the gear apparatus P2 side was demonstrated as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, when the 1st connection part 31 and the 2nd connection part 32 are provided in the internal peripheral surface of the both ends of the shaft insertion hole o3 etc., the 1st connection part 31 and the 1st output bearing 11 and an axial direction are used. In another preferred embodiment of the present invention, the second connecting portion 32 is disposed at a position overlapping with the second output bearing 12 in the axial direction.

(6) In each of the above-described embodiments, the first rotor connecting member 51 extending radially inward from the first rotor Ro1 of the first motor / generator MG1 has the second planetary gear device with respect to the first planetary gear device P1. A second rotor connecting member 52 disposed on the opposite side to the P2 side and extending radially inward from the second rotor Ro2 of the second motor / generator MG2 has a first planetary gear unit with respect to the second planetary gear unit P2. By being arranged on the side opposite to the P1 side, the first space SP1 that houses the first planetary gear device P1 and the second space SP2 that houses the second planetary gear device P2 face each other in the axial direction. The configuration that opens to the side has been described as an example. However, the embodiment of the present invention is not limited to this. Accordingly, the first rotor connecting member 51 is disposed on the second planetary gear device P2 side with respect to the first planetary gear device P1, or the second rotor connecting member 52 is provided with respect to the second planetary gear device P2. One of the preferred embodiments of the present invention is that the first space SP1 and the second space SP2 are opened in the same direction in the axial direction by being arranged on the device P1 side. The first rotor connecting member 51 is disposed on the second planetary gear device P2 side with respect to the first planetary gear device P1, and the second rotor connecting member 52 is disposed on the first planetary gear device P2 with respect to the first planetary gear device P2. One of the preferred embodiments of the present invention is that the first space SP1 and the second space SP2 are opened in the opposite directions in the axial direction by being arranged on the device P1 side.

(7) In each of the above-described embodiments, both the first intermediate support wall d1 and the second intermediate support wall d2 include an axial protrusion that protrudes toward the output gear O in the axial direction, and the axial protrusion The configuration in which the output bearings 11 and 12 are supported has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, one of the first intermediate support wall d1 and the second intermediate support wall d2 includes an axial protrusion that protrudes toward the output gear O in the axial direction in order to support the output bearings 11 and 12. This is also a preferred embodiment of the present invention. In this case, one of the first intermediate support wall d1 and the second intermediate support wall d2 includes an axial protrusion that protrudes on the opposite side of the output gear O, or the wall itself has a sufficient thickness. In such a case, it is possible to employ a configuration in which no axial protrusion is provided on both sides.

(8) In each of the above embodiments, the first intermediate support wall d1 is configured as a separate part from the main case DC1 (case DC), and is integrally attached to the case DC, and the second intermediate support wall d2 is the main The configuration formed integrally with the case DC1 (case DC) has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, the first intermediate support wall d1 is formed integrally with the case DC, and the second intermediate support wall d2 is configured as a separate part from the case DC, and is configured to be integrally attached to the case DC, or In the preferred embodiment of the present invention, both the first intermediate support wall d1 and the second intermediate support wall d2 are configured separately from the case DC and are integrally attached to the case DC. One.

(9) In each of the above-described embodiments, the case where one of the pair of output bearings 11 and 12 is arranged to overlap the tooth surface of the output gear O in the axial direction has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, both of the pair of output bearings 11 and 12 are arranged so as to overlap the tooth surface of the output gear O in the axial direction, or both are arranged so as not to overlap the tooth surface of the output gear O in the axial direction. The configuration is also one of the preferred embodiments of the present invention.

(10) In each of the above embodiments, the first rotor bearing 16 that rotatably supports the first rotor Ro1 of the first motor / generator MG1 is provided so as to support the first rotor coupling member 51 from the radially inner side. As an example, the second rotor bearing 17 that rotatably supports the second rotor Ro2 of the second motor / generator MG2 is provided so as to support the second rotor connecting member 52 from the radially inner side. did. However, the embodiment of the present invention is not limited to this. Accordingly, the first rotor bearing 16 is provided so as to support the first rotor connecting member 51 from the radially outer side, or the second rotor bearing 17 supports the second rotor connecting member 52 from the radially outer side. It is also one of the preferred embodiments of the present invention to have a configuration provided in the above. In this case, for example, the first rotor bearing 16 is provided so as to support the outer peripheral surface of the axial projecting portion formed so as to project from the first rotor coupling member 51 in the axial direction, or the second rotor bearing 17 is provided. It is preferable that the second rotor connecting member 52 is provided so as to support the outer peripheral surface of the axially protruding portion that is formed to protrude in the axial direction.

(11) In each of the embodiments described above, the case where the pair of output bearings 11 and 12 are provided so as to support the outer peripheral surface of the extension shaft portion o2 of the output gear O has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, the configuration in which one or both of the pair of output bearings 11 and 12 are provided so as to support the inner peripheral surface of the extension shaft portion o2 of the output gear O is also a preferred embodiment of the present invention. One.

(12) In each of the above embodiments, the input shaft I as a through shaft is supported by the case DC on both sides in the axial direction with respect to the first planetary gear device P1, and in the first embodiment, as the through shaft, The configuration in which the fixed shaft F is supported by the case DC on both axial sides with respect to the second planetary gear device P2 has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, the input shaft I is supported by the case DC only on one side in the axial direction with respect to the first planetary gear device P1, or the fixed shaft F is supported only on one side in the axial direction with respect to the second planetary gear device P2. A configuration supporting the case DC is also one preferred embodiment of the present invention.

(13) In each of the embodiments described above, the first rotor Ro1 of the first motor / generator MG1 and the second rotor Ro2 of the second motor / generator MG2 are both the first planetary gear unit P1 or the second planetary gear unit P2. The configuration is described as an example in which the case DC is connected to the sun gears s1 and s2 and is rotatably supported at two places of the case DC and the input shaft I or the fixed shaft F as a through shaft. However, the embodiment of the present invention is not limited to this. Therefore, for example, one or both of the first rotor Ro1 of the first motor / generator MG1 and the second rotor Ro2 of the second motor / generator MG2 are supported so as to be rotatable at one place with respect to the case DC, or the sun gear s1. It is also a preferred embodiment of the present invention to support the input shaft I or the fixed shaft F as a penetrating shaft on the radially inner side of s2 so as to be rotatable at one place.

(14) In each of the above embodiments, the first input bearing 13 for supporting the input shaft I is provided on the radially inner side of the axial protrusion d4a provided on the first end support wall d4 of the case DC. The case where the first rotor bearing 16 for supporting the first rotor Ro1 is provided outside the axial protrusion d4a in the radial direction and these are arranged so as to overlap in the axial direction has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, for example, the first input bearing 13 and the first rotor bearing 16 are arranged so as not to overlap in the axial direction, or the first input bearing 13 and the first rotor bearing 16 are supported by the first end of the case DC. Two axial protrusions are provided on the wall d4, and the first input bearing 13 and the first rotor bearing 16 are respectively provided radially inward (or inner peripheral surface) or radially outer (or outer peripheral surface) of each axial protrusion. It is also one of the preferred embodiments of the present invention to have a configuration provided with. This also applies to the support structure on the other axial side (left side in FIG. 4) of the input shaft I in the second embodiment.

(15) In each of the embodiments described above, the first planetary gear device P1 is constituted by a single pinion type planetary gear mechanism, the sun gear s1 is the first motor / generator MG1, the carrier ca1 is the input shaft I, and the ring gear r1 is the output gear. The configuration in which O is connected has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, the first planetary gear device P1 may be configured by a double pinion type planetary gear mechanism, or may be configured by combining a plurality of planetary gear mechanisms of a single pinion type or a double pinion type. one of. In addition, the connection relationship of the first motor / generator MG1, the input shaft I, and the output gear O with respect to the rotating elements of the first planetary gear unit P1 can also be configured differently from the above embodiments. is there. Therefore, for example, in the case where the first planetary gear device P1 is configured by a double pinion type planetary gear mechanism, the first motor / generator MG1 is connected to the sun gear s1, the input shaft I is connected to the ring gear r1, and the output gear O is connected to the carrier ca1. Alternatively, a configuration in which the output gear O is connected to the sun gear s1, the input shaft I is connected to the ring gear r1, and the first motor / generator MG1 is connected to the carrier ca1 is also preferable. Further, for example, in the first planetary gear device P1 configured by a single pinion type planetary gear mechanism, the sun gear s1 is connected to the first motor / generator MG1, the carrier ca1 is connected to the output gear O, and the ring gear r1 is connected to the input shaft I. A configuration is also possible.

(16) In the first embodiment described above, the second planetary gear unit P2 is configured by a single pinion type planetary gear mechanism, the sun gear s2 is the second motor / generator MG2, the carrier ca2 is the non-rotating member, and the ring gear r2 is the ring gear r2. The configuration in which the output gear O is connected has been described as an example. In the second embodiment, the second planetary gear device P2 is configured by a single pinion type planetary gear mechanism, the sun gear s2 is the second motor / generator MG2, the carrier ca2 is the output gear O, and the ring gear r2 is not. The configuration in which the rotating members are connected has been described as an example. However, the embodiment of the present invention is not limited to this. Therefore, the second planetary gear device P2 may be configured by a double pinion type planetary gear mechanism, or may be configured by combining a plurality of planetary gear mechanisms of a single pinion type or a double pinion type. one of. Also, the connection relationship between the second motor / generator MG2, the non-rotating member, and the output gear O with respect to each rotating element of the second planetary gear unit P2 can be different from the above-described embodiments. is there. Therefore, for example, when the second planetary gear device P2 is configured with a double pinion type planetary gear mechanism, the sun gear s2 is connected to the second motor / generator MG2, the ring gear r1 is connected to the output gear O, and the carrier ca1 is connected to the non-rotating member. Alternatively, a configuration in which the non-rotating member is connected to the sun gear s1, the output gear O to the ring gear r1, and the second motor / generator MG2 to the carrier ca1 is also preferable.

  The present invention can be suitably used as a driving device for a hybrid vehicle including an engine and two rotating electric machines as a driving force source.

Sectional drawing of the principal part of the hybrid drive device which concerns on 1st embodiment of this invention. 1 is an overall cross-sectional view of a hybrid drive device according to a first embodiment of the present invention. The speed diagram showing the operation state of the 1st planetary gear apparatus and the 2nd planetary gear apparatus in the hybrid drive device concerning a first embodiment of the present invention. Sectional drawing of the principal part of the hybrid drive device which concerns on 2nd embodiment of this invention. Whole sectional drawing of the hybrid drive device which concerns on 2nd embodiment of this invention. Velocity diagram showing the operating state of the first planetary gear device and the second planetary gear device in the hybrid drive device according to the second embodiment of the present invention.

Explanation of symbols

H: Hybrid drive device I: Input shaft MG1: First motor / generator (first rotating electric machine)
Ro1: first rotor MG2: second motor / generator (second rotating electrical machine)
Ro2: second rotor O: output gear o1: output gear body o2: extension shaft portion o3: shaft insertion hole P1: first planetary gear device P2: second planetary gear device DC: case (non-rotating member)
d1: first intermediate support wall d2: second intermediate support wall SP1: first space SP2: second space 11: first output bearing 12: second output bearing 13: first input bearing 14: second input bearing 16: First rotor bearing 17: Second rotor bearing 33: First output connecting member 34: Second output connecting member 51: First rotor connecting member 52: Second rotor connecting member

Claims (12)

An input shaft connected to the engine, a first rotating electrical machine, a second rotating electrical machine, and disposed on a wheel side with respect to the input shaft, the first rotating electrical machine, and the second rotating electrical machine on a power transmission path. A first planetary gear device and a second planetary gear device each having an output gear, at least a first rotating element, a second rotating element, and a third rotating element, the first rotating electric machine, the second rotating electric machine, A first planetary gear device, the second planetary gear device, and a case that houses the output gear, and a hybrid drive device comprising:
In the first planetary gear device, the first rotating electrical machine is connected to the first rotating element, the input shaft is connected to the second rotating element, and the output gear is connected to the third rotating element.
In the second planetary gear device, the second rotating electrical machine is connected to the first rotating element, the non-rotating member is connected to the second rotating element, and the output gear is connected to the third rotating element,
The first planetary gear device is arranged on the radially inner side of the first rotating electrical machine so as to overlap with the first rotating electrical machine in the axial direction,
The second planetary gear device is arranged on the radially inner side of the second rotating electrical machine so as to overlap with the second rotating electrical machine in the axial direction,
The first rotating electrical machine and the first planetary gear device, the output gear, the second rotating electrical machine and the second planetary gear device are arranged in this order along the axial direction on the same axis as the input shaft.
The case includes a case peripheral wall that covers the outer periphery of each housing component, a first intermediate support wall that is disposed between the output gear and the first planetary gear device in the axial direction and extends radially from the case peripheral wall, A second intermediate support wall disposed between the output gear in the axial direction and the second planetary gear device and extending radially from the case peripheral wall;
The output gear is extended to both sides in the axial direction with respect to the output gear main body, and includes an extended shaft portion having a smaller diameter than the first planetary gear device and the second planetary gear device,
The third rotating element of the first planetary gear device is disposed on the second planetary gear device side with respect to the first planetary gear device, via a first output connecting member extending in the radial direction, on one axial side. Connected to the output gear at the extension shaft,
The third rotating element of the second planetary gear device is disposed on the first planetary gear device side with respect to the second planetary gear device, and is disposed on the other side in the axial direction via a second output connecting member extending in the radial direction. Connected to the output gear at the extension shaft,
A pair of output bearings rotatably supporting the output gear from both axial sides on the output gear side relative to the first planetary gear device and the second planetary gear device;
The pair of output bearings includes the first planetary gear device and the second planetary gear device between each of the first intermediate support wall and the second intermediate support wall and the extending shaft portions on both axial sides. And a hybrid drive unit arranged in the radial direction. A first space formed inside the first rotating electrical machine to receive the first planetary gear device, and a first space formed inside the second rotating electrical machine to receive the second planetary gear device. The hybrid drive device according to claim 1 , wherein the two spaces are opened on sides facing each other in the axial direction. The first rotor of the first rotating electrical machine is coupled to the first rotating element of the first planetary gear device via a first rotor coupling member extending radially inward from the first rotor,
The second rotor of the second rotating electrical machine is connected to the first rotating element of the second planetary gear device via a second rotor connecting member extending radially inward from the second rotor,
The first rotor connecting member is disposed on the side opposite to the second planetary gear device side with respect to the first planetary gear device,
3. The hybrid drive device according to claim 1, wherein the second rotor connecting member is disposed on a side opposite to the first planetary gear device side with respect to the second planetary gear device. The first planetary gear device is housed in a space surrounded by the inner peripheral surface of the first rotor and the first rotor connecting member,
4. The hybrid drive device according to claim 3 , wherein the second planetary gear device is accommodated in a space surrounded by an inner peripheral surface of the second rotor and the second rotor connecting member. One or both of the first intermediate support wall and the second intermediate support wall includes an axial protrusion that protrudes toward the output gear in the axial direction, and the output bearing is supported by the axial protrusion. Item 5. The hybrid drive device according to any one of Items 1 to 4 . At least one of the pair of output bearings, hybrid drive apparatus according to any one of claims 1 to 5 in which the tooth surface and are arranged overlapping in the axial direction of the output gear. The first rotor of the first rotating electrical machine is coupled to the first rotating element of the first planetary gear device via a first rotor coupling member extending radially inward from the first rotor, and the second rotation The second rotor of the electric machine is connected to the first rotating element of the second planetary gear device through a second rotor connecting member extending radially inward from the second rotor,
A first rotor bearing that rotatably supports the first rotor is provided so as to support an inner peripheral surface of an axially protruding portion that is formed to protrude in the axial direction from the first rotor coupling member, and the second rotor A second rotor bearing that rotatably supports the inner circumferential surface of an axial protrusion formed in an axial direction protruding from the second rotor connecting member,
The hybrid drive device according to any one of claims 1 to 6 , wherein the pair of output bearings are provided so as to support an outer peripheral surface of the extending shaft portion. One end portion of the input shaft is inserted into a shaft insertion hole provided in the shaft center portion of the output gear, and the input bearing is disposed between the inner peripheral surface of the shaft insertion hole and the outer peripheral surface of the input shaft. The hybrid drive device according to any one of claims 1 to 7 , wherein the hybrid drive device is rotatably supported on an inner peripheral surface of the shaft insertion hole via a shaft. One end portion of the input shaft passes through a shaft insertion hole provided in a shaft center portion of the output gear, and is rotatably supported by an input bearing disposed on the second rotating electrical machine side with respect to the output gear. The hybrid drive device according to any one of claims 1 to 7 . The first planetary gear unit includes a sun gear as rotation elements, the carrier, and a ring gear, the sun gear first rotating electrical machine, the input shaft to the carrier, from claim 1, wherein the output gear are respectively connected to the ring gear 9 The hybrid drive apparatus as described in any one of these. The second planetary gear unit includes a sun gear as rotation elements, the carrier, and a ring gear, the sun gear second rotary electric machine, non-rotating member to the carrier, from claim 1, wherein the output gear are respectively connected to the ring gear 10 The hybrid drive apparatus as described in any one of these. The second planetary gear unit includes a sun gear as rotation elements, the carrier, and a ring gear, the sun gear second rotating electrical machine, claim 1 wherein the output gear to the carrier, the non-rotating member to the ring gear are connected, respectively 10 The hybrid drive apparatus as described in any one of these.