JP2012166738A - Driving device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for a vehicle, capable of supplying lubricating liquid which is scraped up by a scraping member to a position separated from the combing up member by a partition wall, while suppressing increase in a size of a case and a cost.SOLUTION: In a second accommodation chamber S2, a radial direction flow path 71 extending at least in a radial direction R, which circulates the lubricating liquid from an object end portion 13 that is the end portion on the other side of a first accommodation chamber S1 of a rotor shaft 22 of a second rotation machine 12 to a support bearing 91 is formed, and the rotor shaft 22 of the second rotation machine 12 is arranged penetrating the partition wall 61, and a lubricant liquid supplied section 14 to which the lubricant liquid scraped up by the scraping member 8a is supplied to a part positioned in the first accommodation chamber S1, is provided. A flow path 72 inside a shaft, which connects the lubricant liquid supplied section 14 and the object end section 13 positioned in the second accommodation chamber S2 is formed inside the rotor shaft 22.

Description

  The present invention includes an input member drivingly connected to an internal combustion engine, a first rotating electrical machine, a second rotating electrical machine, an output member drivingly connected to a wheel, an input member, the first rotating electrical machine, and a second rotating electrical machine. The present invention relates to a vehicle drive device that includes a power transmission mechanism that transmits power to and from an output member, and a case.

  As the above vehicle drive device, for example, a device described in Patent Document 1 below is already known. Hereinafter, in the description of the background art, the code or name of Patent Document 1 is appropriately described in () and cited. In the device described in Patent Document 1, a scraping member (a diff ring gear 51) that rotates as the output member rotates to enable lubrication of the drive device when the vehicle is towed or when the internal combustion engine (engine) is stopped. ) Using a lubricating fluid supply mechanism.

  Specifically, in the configuration of Patent Document 1, as shown in Paragraphs 0019 and 0021 of Patent Document 1 and FIG. 6, a storage chamber in which the scraping member is stored and a portion that requires lubricating liquid ( An opening (94a) is formed in a partition wall (end wall 94) that divides the storage chamber in which the friction material of the brake 6 is stored, and the end of the case (9A, 9B) extends axially from the opening. Dedicated members (樋 90a, 90b) extending to the end are provided. By using these openings and dedicated members, the lubricating liquid scraped up by the scraping member can be supplied to a position (brake 6) separated from the scraping member by a partition wall. ing.

  However, in the configuration described in Patent Document 1, it is necessary to provide a dedicated member extending in the axial direction for supplying and receiving the lubricating liquid between the storage chambers on both sides of the partition wall, which increases the size of the case and the manufacturing cost. May increase.

Japanese Patent Laying-Open No. 2005-83471 (paragraphs 0019, 0021, FIG. 6, etc.)

  Therefore, a vehicle drive device capable of supplying the lubricating liquid scraped up by the scraping member to a position separated from the scraping member by a partition wall while suppressing an increase in case size and cost. Realization of is desired.

  An input member drivingly connected to the internal combustion engine according to the present invention, a first rotating electrical machine, a second rotating electrical machine, an output member drivingly connected to a wheel, the input member, the first rotating electrical machine, and the second A characteristic configuration of a vehicle drive device including a power transmission mechanism that transmits power between the rotating electrical machine and the output member, and a case, the rotor shaft of the second rotating electrical machine includes the first rotating electrical machine The power transmission mechanism rotates with the rotation of the output member, and includes a scraping member that scrapes up the lubricant stored in the case at the time of rotation. A first storage chamber in which the internal space of the case is partitioned in the axial direction of the second rotating electrical machine to store the scraping member, and a second storage chamber in which the first rotating electrical machine and the second rotating electrical machine are stored And a partition wall to form the first time A support bearing for supporting the rotor shaft of the first rotating electrical machine is provided on the opposite side of the partition body in the axial direction with respect to the rotor body of the electrical machine, and at least the second rotating electrical machine is provided in the second storage chamber. A radial flow path is formed that extends in the radial direction and allows the lubricating liquid to flow from the target end, which is the end of the rotor shaft of the second rotating electrical machine opposite to the first storage chamber, to the support bearing. The rotor shaft of the second rotating electrical machine is disposed through the partition wall, and the lubricating liquid coating is supplied with the lubricating liquid scraped up by the scraping member to a portion located in the first containing chamber. A supply portion is provided, and an in-shaft channel that communicates the lubricating liquid supply portion and the target end located in the second storage chamber is formed in the rotor shaft of the second rotating electrical machine. It is in.

In the present application, “driving connection” refers to a state where two rotating elements are connected so as to be able to transmit a driving force, and the two rotating elements are connected so as to rotate integrally, or the two The rotating element is used as a concept including a state in which the driving force is connected to be transmitted through one or more transmission members. Examples of such a transmission member include various members that transmit rotation at the same speed or a variable speed, and include, for example, a shaft, a gear mechanism, a belt, a chain, and the like. Further, as such a transmission member, an engagement device that selectively transmits rotation and driving force, for example, a friction engagement element, a meshing engagement element, or the like may be included. Note that “driving force” is used synonymously with “torque”.
Further, in the present application, the “rotary electric machine” is used as a concept including any of a motor (electric motor), a generator (generator), and a motor / generator functioning as both a motor and a generator as necessary.

According to said characteristic structure, with respect to the 2nd storage chamber separated from the said 1st storage chamber from the said 1st storage chamber by the partition, it is called the rotor shaft (henceforth "the 2nd rotor shaft") of a 2nd rotary electric machine. .)) Can be supplied through an in-axis flow path formed inside. That is, the lubricating liquid can be supplied from the first storage chamber to the second storage chamber by effectively using the second rotor shaft that is an existing part constituting the second rotating electrical machine. At this time, the flow path in the shaft can be formed by adopting, for example, a hollow shaft formed with a hole extending in the axial direction as the second rotor shaft. The increase in size and the increase in size in the radial direction of the case can be kept low.
In the above-described characteristic configuration, the in-shaft oil passage includes the lubricating liquid supply portion to which the lubricating liquid scraped up by the scraping member is supplied and the lubricating liquid via the radial flow path with respect to the support bearing. Since the target end, which is a part capable of supplying water, communicates with the target end, the lubricating liquid scraped up by the scraping member is supplied to the support bearing through the oil passage in the shaft, and the support bearing is lubricated. Is called. At this time, since the second rotor shaft is disposed above the rotor shaft of the first rotating electrical machine (hereinafter referred to as the “first rotor shaft”), the lubricating liquid is reduced in diameter with a simple configuration using gravity. It is possible to flow to the downstream side (support bearing side) along the directional flow path.
As described above, according to the above-described characteristic configuration, the lubricant liquid scooped up by the scooping member is placed at a position separated from the scooping member by the partition wall while suppressing an increase in case size and cost. It becomes possible to supply to the arranged support bearing.

  Here, a second support bearing that supports the rotor shaft of the second rotating electrical machine is provided on the side opposite to the partition wall in the axial direction with respect to the rotor body of the second rotating electrical machine, and the radial flow path However, it is preferable that the second support bearing is formed so as to allow the lubricating liquid to flow therethrough.

According to this configuration, not only the support bearing that supports the first rotor shaft but also the first rotor shaft through the radial flow path that is a common flow path with the lubricating liquid scraped up by the scraping member. Can also be supplied to a support bearing (second support bearing) for supporting a second rotor shaft arranged on a different shaft. Therefore, an increase in cost and an increase in the size of the case can be suppressed as compared with the case where a dedicated supply channel is provided for each support bearing.
In addition, by providing a plurality of support bearings as the supply destination of the lubricating liquid in the radial flow path, even if the amount of the lubricating liquid scraped up by the scraping member becomes excessive, it is supplied to each supporting bearing. It becomes easy to adopt a configuration in which the lubricating liquid is suppressed to an appropriate amount, that is, a configuration in which excessive drag loss does not occur in each support bearing.

  Further, the support bearing is a first support bearing, and a second support that supports a rotor shaft of the second rotating electrical machine on a side opposite to the partition wall in the axial direction with respect to a rotor body of the second rotating electrical machine. A bearing is provided, and the case includes an end wall defining a side opposite to the partition wall in the axial direction of the second storage chamber, and the end wall includes the first support bearing and the second support bearing. It is preferable that the radial flow path is formed in the end wall while supporting.

  According to this configuration, the first support bearing, or both the first support bearing and the second support bearing, which are the supply destinations of the lubricating fluid in the radial flow path, are supported on the end wall where the radial flow path is formed. Therefore, the configuration of the radial flow path can be simplified, and the enlargement of the case and the increase in cost can be more reliably suppressed.

  As described above, in the configuration in which the case includes the end wall in which the first support bearing and the second support bearing are supported and the radial flow path is formed, the input member and the first rotation A pump that is coaxially arranged with the rotor shaft of the electric machine and operates by rotation of the input member, and the pump is attached to the end wall from the inside of the second storage chamber and between the end wall. And a pump cover that forms a pump chamber that houses the rotor of the first support bearing, wherein the first support bearing is supported by the pump cover, and a part of the radial flow path is formed by the end wall and the pump. It is preferable that it is formed along the joint with the cover.

According to this configuration, since the first support bearing is supported by the pump cover, the pump cover that forms the pump chamber is disposed between the end wall in the axial direction and the first rotor shaft. it can. Therefore, it is possible to easily realize a configuration in which the input member that drives the pump and the first rotor shaft are arranged coaxially.
Moreover, since a part of radial direction flow path is formed along the junction part of an end wall and a pump cover, a ditch | groove is provided in at least one of the joint surface of the end wall in the said junction part, and the joint surface of a pump cover. Only that part of the radial flow path can be formed. Therefore, the manufacturing process can be simplified as compared with the case where the part of the radial flow path is formed by drilling the end wall or the pump cover.

  Further, as described above, in the configuration in which the case includes the end wall in which the first support bearing and the second support bearing are supported and the radial flow path is formed, an inner surface of the end wall is provided. A stepped portion is provided that has a stepped surface that faces at least one circumferential direction of the second rotating electrical machine and extends in the radial direction, and a part of the radial flow path is formed by the stepped portion. It is preferable.

According to this configuration, since the lubricating liquid can be flowed along the extending direction of the stepped portion using gravity or surface tension, the lubricating liquid can be appropriately supplied while simplifying the configuration of the radial flow path. It can be supplied to the support bearing.
Further, by forming a part of the radial flow path with the stepped portion, even if the amount of the lubricating liquid scraped up by the scraping member becomes excessive, excessive lubrication can be achieved without providing a special configuration. The liquid can flow out from the stepped portion to the outside of the radial flow path. Therefore, it is possible to suppress an excessive amount of the lubricating liquid from being supplied to the support bearing, and it is possible to easily and reliably suppress an excessive drag loss from occurring in the support bearing.

  In the vehicle drive device having each configuration described above, it is preferable that the stator of the first rotating electrical machine and the stator of the second rotating electrical machine are arranged so as to have overlapping portions in the radial direction view.

  In the present application, regarding the arrangement of two members, “having overlapping portions when viewed in the radial direction” means that when the viewpoint is moved in each direction orthogonal to the visual line direction with the radial direction as the visual line direction, This means that the viewpoint where the members appear to overlap each other exists in at least a part of the region.

  In the configuration as described above, the axial length of the space occupied by the first rotating electrical machine and the second rotating electrical machine can be shortened by the amount overlapped when viewed in the radial direction. Therefore, the arrangement is suitable for a vehicle drive device that is required to have a small axial length. On the other hand, in such an arrangement, the radial size of the space occupied by the first rotating electrical machine and the second rotating electrical machine is approximately the sum of the diameters of both the first rotating electrical machine and the second rotating electrical machine. . Therefore, in such a configuration, it is preferable that the radial direction of the case is shortened with respect to the arrangement and configuration of other components. In this regard, according to the vehicle drive device of the present invention, as described above, the mechanism for supplying the lubricating liquid from the first storage chamber to the second storage chamber suppresses an increase in the size of the case in the radial direction. Therefore, the present invention is suitable for the above configuration.

  The vehicle drive device having each of the above configurations further includes a differential gear mechanism including at least three rotation elements, that is, a first rotation element, a second rotation element, and a third rotation element. The first rotating electrical machine is drivingly connected to the first rotating element, the input member is drivingly connected to the second rotating element, and the second rotating element is connected to the second rotating element without passing through another rotating element. It is preferable that the electric machine and the output member are drivingly connected.

  According to this configuration, it is possible to realize an electric traveling mode in which the torque of the second rotating electrical machine is transmitted to the output member and the wheels are driven while the internal combustion engine is stopped. And according to said structure, even if it is a case where only the pump driven by an internal combustion engine is provided, the lubricating liquid scooped up by the scooping member during execution of electric drive mode is used for a support bearing. The support bearing can be properly lubricated.

It is the fragmentary sectional view which cut | disconnected the vehicle drive device which concerns on embodiment of this invention along the axial direction. It is II-II sectional drawing in FIG. It is III-III sectional drawing in FIG. 1 is a skeleton diagram showing an overall configuration of a vehicle drive device according to an embodiment of the present invention.

  An embodiment of a vehicle drive device according to the present invention will be described with reference to the drawings. As shown in FIG. 4, the vehicle drive device 1 (hereinafter simply referred to as “drive device”) according to the present embodiment includes an internal combustion engine 2 and two rotating electrical machines (a first rotating electrical machine 11 and a second rotating electrical machine). 12) as a driving force source for the wheels 5 and used as a driving device for a so-called two-motor split type hybrid vehicle. That is, the drive device 1 includes an input shaft 3 that is drivingly connected to the internal combustion engine 2, a first rotating electrical machine 11 and a second rotating electrical machine 12, an output shaft 4 that is drivingly connected to the wheels 5, and the input shaft 3. A power transmission mechanism 100 that transmits power between the first rotary electric machine 11, the second rotary electric machine 12, and the output shaft 4 and a case 60 (see FIG. 1) are provided.

  In the present embodiment, the input shaft 3 corresponds to an “input member” in the present invention, and the output shaft 4 corresponds to an “output member” in the present invention. In the following description, unless otherwise specified, the “axial direction L”, “circumferential direction C”, and “radial direction R” are the axis of the second rotating electrical machine 12 (second axis A2, FIGS. 1 and 2). See). Further, the “first axial direction L1” is a direction from the first storage chamber S1 toward the second storage chamber S2 along the axial direction L (a direction from the partition wall 61 toward the end wall 62, the left direction in FIG. 1). “The second axial direction L2” is a direction from the second storage chamber S2 toward the first storage chamber S1 along the axial direction L (a direction from the end wall 62 toward the partition wall 61, rightward in FIG. 1). ).

  In the following description, unless otherwise specified, “upper” and “lower” are defined on the basis of the vertical direction V (see FIGS. 2 and 3) when the drive device 1 is mounted on the vehicle. . In addition, the direction about each member represents the direction in the state in which each said member was assembled | attached to the drive device 1. FIG. Here, the direction of each member and the relationship of the arrangement direction between the two members (for example, “parallel”, “orthogonal”, etc.) are used as concepts including deviations according to manufacturing errors. Such manufacturing errors are caused, for example, by deviations within the tolerances of dimensions and mounting positions.

  This drive device 1 utilizes a differential input gear 8a (see FIG. 3) that rotates with the rotation of the output shaft 4 so as to enable lubrication of each part when the vehicle is towed or when the internal combustion engine 2 is stopped. A lubricating fluid supply mechanism is provided. In the driving device 1, the lubricant is supplied from the first storage chamber S <b> 1 in which the differential input gear 8 a is disposed to the second storage chamber S <b> 2 separated from the first storage chamber S <b> 1 by the partition wall 61. Therefore, the supply mechanism of the lubricating liquid is configured using the second rotor shaft 22 which is an existing part constituting the second rotating electrical machine 12. Accordingly, it is possible to supply the lubricant to the member disposed at a position separated from the differential input gear 8a by the partition wall 61 while suppressing an increase in size and cost of the case 60. Yes. Hereinafter, the configuration of the drive device 1 according to the present embodiment will be described in detail. In addition, each drawing referred to in the following description schematically shows a configuration necessary for understanding the present invention, and a part of the configuration is omitted as appropriate, or a part of the configuration is simplified and shown. ing.

1. Overall Schematic Configuration of Driving Device First, the overall configuration of the driving device 1 according to the present embodiment will be described. As shown in FIG. 4, the drive device 1 is a hybrid vehicle including an internal combustion engine 2 and two rotating electrical machines (a first rotating electrical machine 11 and a second rotating electrical machine 12) as driving force sources for the wheels 5. It is set as the drive device for using for. The drive device 1 includes an input shaft 3, a first rotating electrical machine 11, a second rotating electrical machine 12, an output shaft 4 that is drivingly connected to the wheels 5, a power transmission mechanism 100, and a case 60. I have. The power transmission mechanism 100 is a mechanism for drivingly connecting the input shaft 3, the first rotating electrical machine 11, the second rotating electrical machine 12, and the output shaft 4, and transmitting power between them. In the present embodiment, the power transmission mechanism 100 includes the planetary gear mechanism 6, the counter gear mechanism 7, the output differential gear mechanism 8 including the differential input gear 8a, the first rotor shaft 21, the second rotor shaft 22, and the second. A rotary electric machine output gear 20 is provided. In the present embodiment, the case 60 is configured to accommodate the power transmission mechanism 100, the first rotating electrical machine 11, and the second rotating electrical machine 12.

  The input shaft 3 is drivingly connected to the internal combustion engine 2. Here, the internal combustion engine 2 is a prime mover that outputs power by the combustion of fuel. For example, a spark ignition engine such as a gasoline engine or a compression ignition engine such as a diesel engine can be used. In this example, the input shaft 3 is directly connected to an output shaft of an internal combustion engine such as a crankshaft of the internal combustion engine 2. It is also preferable that the input shaft 3 is drivingly connected to the output shaft of the internal combustion engine via a damper, a clutch or the like.

  The first rotating electrical machine 11 includes a stator 11b fixed to the case 60, and a rotor body 11a that is rotatably supported inside the stator 11b in the radial direction (radial direction with respect to the first axis A1). is doing. The rotor body 11 a of the first rotating electrical machine 11 is fixed to the first rotor shaft 21 and is drivingly connected to the sun gear 6 a of the planetary gear mechanism 6 via the first rotor shaft 21 so as to rotate integrally. The stator 11b includes a coil end portion 11c formed by a coil wound around the stator 11b. In the present embodiment, the first rotor shaft 21 corresponds to the “rotor shaft of the first rotating electrical machine” in the present invention.

  The second rotating electrical machine 12 includes a stator 12b fixed to the case 60, and a rotor body 12a that is rotatably supported inside the stator 12b in the radial direction R. The rotor body 12 a of the second rotating electrical machine 12 is fixed to the second rotor shaft 22, and is drive-connected so as to rotate integrally with the second rotating electrical machine output gear 20 via the second rotor shaft 22. In addition, the stator 12b includes a coil end portion 12c formed by a coil wound around the stator 12b. In the present embodiment, the second rotor shaft 22 corresponds to the “rotor shaft of the second rotating electrical machine” in the present invention.

  As shown in FIGS. 1 and 2, the second rotating electrical machine 12 is disposed on a different axis from the first rotating electrical machine 11. The second rotor shaft 22 is disposed above the first rotor shaft 21. In the present embodiment, the stator 11b of the first rotating electrical machine 11 and the stator 12b of the second rotating electrical machine 12 are arranged so as to have overlapping portions in the radial direction R view. Specifically, as shown in FIG. 1, in this example, a portion (stator core) excluding the coil end portion 11 c in the stator 11 b of the first rotating electrical machine 11 and the coil end portion 12 c in the stator 12 b of the second rotating electrical machine 12. The portion (stator core) except for is disposed so as to have an overlapping portion in the radial direction R view.

  Each of the first rotating electrical machine 11 and the second rotating electrical machine 12 has a function as a motor (electric motor) that receives power supply and generates power, and a generator (generator) that generates power upon receiving power supply. ) As a function. Therefore, each of the 1st rotary electric machine 11 and the 2nd rotary electric machine 12 is electrically connected with the electrical storage apparatus which is not shown in figure. As this power storage device, various known power storage devices such as a battery and a capacitor can be used.

  As shown in FIG. 4, in the present embodiment, the first rotating electrical machine 11 generates power by the torque of the input shaft 3 (internal combustion engine 2) input mainly through the planetary gear mechanism 6 and charges the power storage device. Alternatively, it functions as a generator that supplies electric power for driving the second rotating electrical machine 12. The second rotating electrical machine 12 mainly functions as a motor that generates a driving force for running the vehicle. However, when the vehicle travels at a high speed or when the internal combustion engine 2 is started, the first rotating electrical machine 11 may function as a motor that generates power by driving. Further, when the vehicle is decelerated, the second rotating electrical machine 12 may function as a generator that regenerates the vehicle's inertial force as electric energy.

  In this embodiment, the planetary gear mechanism 6 is a single pinion type planetary gear mechanism that is arranged coaxially with the input shaft 3. In other words, the planetary gear mechanism 6 has three rotating elements: a carrier 6b that supports a plurality of pinion gears, and a sun gear 6a and a ring gear 6c that respectively mesh with the pinion gears.

  The ring gear 6c is drivingly connected to the second rotating electrical machine 12 via the counter gear mechanism 7 and is also connected to the output shaft 4 via the counter gear mechanism 7 and the output differential gear mechanism 8. . Therefore, in the present embodiment, the first rotating electrical machine 11 (first rotor shaft 21) is drivingly connected to the sun gear 6a with respect to the three rotating elements provided in the planetary gear mechanism 6 without intervening other rotating elements, and the carrier 6b. The second rotary electric machine 12 and the output shaft 4 are drivingly connected to the ring gear 6c. In the present embodiment, the planetary gear mechanism 6 corresponds to the “differential gear mechanism” in the present invention, and the sun gear 6a, the carrier 6b, and the ring gear 6c are the “first rotating element” and the “second rotating element” in the present invention, respectively. ”And“ third rotation element ”.

  The three rotating elements included in the planetary gear mechanism 6 are a sun gear 5a, a carrier 5b, and a ring gear 5c in order of rotational speed. The “order of rotational speed” is either the order from the high speed side to the low speed side, or the order from the low speed side to the high speed side, and can be any depending on the rotation state of the planetary gear mechanism 6. Even in this case, the order of the rotating elements does not change.

  The planetary gear mechanism 6 functions as a power distribution device that distributes and transmits the torque of the internal combustion engine 2 transmitted to the input shaft 3 to the first rotating electrical machine 11 and the ring gear 6c (counter drive gear 24). In the planetary gear mechanism 6, the input shaft 3 is drivingly connected to a carrier 6b that is intermediate in the order of rotational speed. In addition, the rotor body 11a of the first rotating electrical machine 11 is drivingly connected to the sun gear 6a on the one side in the order of the rotational speed via the first rotor shaft 21. In the drive device 1 according to the present embodiment, the forward torque of the internal combustion engine 2 is transmitted to the carrier 6b that is intermediate in the order of the rotational speed via the input shaft 3, and the sun gear 6a that is on the one side in the order of the rotational speed. The negative torque output from the first rotating electrical machine 11 is transmitted to the motor. The torque in the negative direction of the first rotating electrical machine 11 functions as a reaction force of the torque of the internal combustion engine 2, whereby the planetary gear mechanism 6 is transmitted to the carrier 6 b via the input shaft 3. A part of the torque is distributed to the first rotating electrical machine 11, and the torque attenuated with respect to the torque of the internal combustion engine 2 is transmitted to the ring gear 6c on the other side in the order of the rotational speed. The ring gear 6c is drivingly connected so as to rotate integrally with the counter drive gear 24 as shown in FIG.

  As shown in FIG. 4, the counter gear mechanism 7 reverses the rotation direction of the counter drive gear 24 and transmits torque transmitted from the counter drive gear 24 to the output differential gear mechanism 8 on the wheel 5 side. . The counter gear mechanism 7 includes a counter first gear 7a, a counter second gear 7b, and a counter shaft 7c that is coupled so as to rotate integrally. The counter first gear 7 a meshes with the counter drive gear 24. Further, the counter first gear 7a meshes with the second rotating electrical machine output gear 20 at a position different from the counter drive gear 24 in the circumferential direction (circumferential direction with the third axis A3 as a reference). The counter second gear 7 b meshes with the differential input gear 8 a of the output differential gear mechanism 8. Accordingly, the counter gear mechanism 7 reverses the rotation directions of the counter drive gear 24 and the second rotating electrical machine output gear 20, and the torque transmitted to the counter drive gear 24 and the torque transmitted to the second rotating electrical machine output gear 20. Is transmitted to the differential gear mechanism 8 for output.

  The output differential gear mechanism 8 includes a differential input gear 8a, and distributes and transmits torque transmitted to the differential input gear 8a to the plurality of wheels 5. In this example, the output differential gear mechanism 8 is a differential gear mechanism using a plurality of bevel gears meshing with each other, and is connected to the differential input gear 8 a via the counter second gear 7 b of the counter gear mechanism 7. The transmitted torque is distributed to the two output shafts 4 and transmitted to the two left and right wheels 5 via the output shaft 4. At this time, the output differential gear mechanism 8 transmits the rotation to the wheel 5 by reversing the rotation direction of the counter second gear 7b. Thus, the drive device 1 rotates the wheel 5 in the same direction as the rotation direction of the input shaft 3 (internal combustion engine 2) during forward travel, and is the same as the input shaft 3 (internal combustion engine 2) and the second rotating electrical machine 12. The direction torque is transmitted to the wheels 5 to drive the vehicle. In the present embodiment, the differential input gear 8a corresponds to the “scraping member” in the present invention.

  The output differential gear mechanism 8 is configured to always drive-connect the differential input gear 8a and the output shaft 4, so that the differential input gear 8a rotates as the output shaft 4 rotates. . As will be described later, the differential input gear 8a is configured to scoop up the lubricating liquid stored in the case 60 during rotation (see FIG. 3). As described above, the output differential gear mechanism 8 included in the power transmission mechanism 100 rotates with the rotation of the output shaft 4, and the differential input gear 8 a that scoops up the lubricant stored in the case 60 during the rotation. I have.

  As shown in FIG. 3, the driving device 1 according to the present embodiment includes a first shaft A <b> 1 on which the input shaft 3, the planetary gear mechanism 6, and the first rotating electrical machine 11 are disposed, and a second rotating electrical machine 12. The second shaft A 2, the third shaft A 3 on which the counter gear mechanism 7 is disposed, and the fourth shaft A 4 on which the output differential gear mechanism 8 is disposed are provided in a four-axis configuration. And 1st axis | shaft A1, 2nd axis | shaft A2, 3rd axis | shaft A3, and 4th axis | shaft A4 are mutually arrange | positioned in parallel. Thus, in this embodiment, the 1st rotary electric machine 11 and the 2nd rotary electric machine 12 are arrange | positioned on a mutually different axis | shaft and a mutually parallel axis | shaft, and the 1st rotor axis | shaft 21 and the 2nd rotor axis | shaft 22 are arranged in parallel to each other. Further, as described above, the second rotor shaft 22 (second shaft A2) is disposed above the first rotor shaft 21 (first shaft A1). As shown in FIG. 4, the input shaft 3 is disposed coaxially with the first rotating electrical machine 11, that is, coaxially with the first rotor shaft 21.

  And the drive device 1 which concerns on this embodiment is the torque of the 2nd rotary electric machine 12 in the hybrid driving mode which drive | works with the output torque of both the internal combustion engine 2 and the rotary electric machines 11 and 12, and the state which stopped the internal combustion engine 2. And an EV (electric) travel mode in which the wheel 5 is driven by transmitting to the output shaft 4. In the hybrid travel mode, as described above, the planetary gear mechanism 6 causes the torque of the internal combustion engine 2 to be distributed to the first rotating electrical machine 11 and the ring gear 6c. On the other hand, in the EV travel mode, the internal combustion engine 2 is stopped, and the rotational speed of the internal combustion engine output shaft (input shaft 3) becomes zero due to the frictional force inside the internal combustion engine 2.

  As shown in FIG. 1, the drive device 1 according to this embodiment includes a pump 10 that is a mechanical pump that operates by rotation of the input shaft 3. In this embodiment, the lubricating liquid is a lubricating cooling liquid (such as oil) that is used for cooling in addition to lubrication, and the pump 10 is used for both lubrication and cooling of the members constituting the drive device 1. It is configured to generate the necessary hydraulic pressure. As shown in FIG. 4, the pump 10 is drivingly connected to the internal combustion engine 2 via a pump drive shaft 10 a that rotates integrally with the input shaft 3, and is driven by the torque of the internal combustion engine 2. As the pump 10, an internal gear type pump having an inner rotor and an outer rotor is preferably used. It is also preferable to use an external gear type pump or a vane pump.

  By providing the pump 10 as described above, the lubricating liquid can be circulated by the pump 10 when the internal combustion engine 2 is operating and the input shaft 3 is rotating. On the other hand, when the internal combustion engine 2 is stopped, the rotation of the input shaft 3 is also stopped, so that the pump 10 does not operate. Therefore, the drive device 1 has a configuration that uses the rotation of the output shaft 4 that always rotates when the vehicle travels, as will be described in detail later. Specifically, a mechanism is provided for supplying the lubricating liquid scraped up by a scraping member (in this example, the differential input gear 8a) that rotates with the rotation of the output shaft 4 to a site that requires the lubricating liquid. ing. As a result, even when the internal combustion engine 2 is stopped and the rotation of the input shaft 3 is stopped, such as during the EV traveling mode or when the vehicle is being towed, it is possible to perform appropriate lubrication. ing.

2. Next, a specific configuration of a main part of the drive device 1 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 1, the drive device 1 includes a case 60 that houses at least each member (see FIG. 4) included in the power transmission mechanism 100. In the present embodiment, the case 60 houses the first rotating electrical machine 11 and the second rotating electrical machine 12 in addition to the power transmission mechanism 100, and further, at least a part of the input shaft 3 and at least a part of the output shaft 4. Is also configured to accommodate.

  The case 60 includes a partition wall 61 that partitions a case internal space S formed in the case 60 in the axial direction L. And by this partition wall 61, the case inner space S has a first accommodating chamber S1 in which the differential gear mechanism for output 8 including the differential input gear 8a, the planetary gear mechanism 6, and the counter gear mechanism 7 are accommodated. The first rotary electric machine 11 and the second rotary electric machine 12 are partitioned into a second storage chamber S2. That is, the first storage chamber S1 and the second storage chamber S2 are formed in the case inner space S. Further, the case 60 includes an end wall 62 that defines a side opposite to the partition wall 61 in the axial direction L of the second storage chamber S2. In the present embodiment, both the partition wall 61 and the end wall 62 have shapes extending in the radial direction R and the circumferential direction C.

  As shown in FIGS. 1 and 3, a lubricating liquid receiving portion 90 that receives the lubricating liquid scraped up by the differential input gear 8a is provided in the upper portion of the first storage chamber S1. As shown in FIG. 3, the differential input gear 8a is disposed at a position where the lubricating liquid stored in the lower portion of the first storage chamber S1 can be scooped up. The lubricating liquid scraped up by the differential input gear 8 a is supplied to the lubrication receiving portion 90 through the inner surface of the case 60 or the like. In the present embodiment, the lubricating liquid receiver 90 is configured as an oil catch tank that receives and stores the lubricating liquid.

  Specifically, as shown in FIG. 3, the lubricating liquid receiving part 90 is disposed above the second rotor shaft 22, and is an opening for introducing the lubricating liquid scraped up by the differential input gear 8a. Part 90a. Further, the case 60 is provided with a communication flow path 87 for communicating the lubricating liquid receiving portion 90 and an in-axis flow path 72 (described later) formed inside the second rotor shaft 22. The communication channel 87 is open in the receiving portion 90. In the present embodiment, as shown in FIG. 1, the communication flow path 87 is formed by a hole formed in the wall of the case 60. The communication channel 87 may be formed by a groove or the like formed on the wall surface of the case 60, or a tubular member or a bowl-shaped member disposed in the case 60.

  As shown in FIG. 1, a pump cover 40 included in the pump 10 is attached to the end wall 62 from the inner side of the second storage chamber S2. The pump cover 40 has a shape extending in the radial direction R and the circumferential direction C. A pump chamber 10 c that houses a pump rotor 10 b that is a rotor of the pump 10 is formed between the pump cover 40 and the end wall 62. As described above, the pump 10 is a mechanical pump that operates by the rotation of the input shaft 3. Therefore, a pump drive shaft 10a that is drivingly connected to the input shaft 3 is fixed to the pump rotor 10b. The pump drive shaft 10a is disposed so as to pass through a through hole provided in the pump cover 40 in the axial direction (axial direction of the first axis A1), and the pump drive shaft 10a is located in the pump chamber 10c. A pump rotor 10b is fixed to the front end portion of the motor.

  In the present embodiment, the pump drive shaft 10 a is drivingly connected so as to rotate integrally with the input shaft 3, and is disposed coaxially with the input shaft 3. As described above, the input shaft 3 is also coaxially arranged with the first rotor shaft 21. In order to achieve such an arrangement, in the present embodiment, as shown in FIG. 1, the first rotor shaft 21 is formed in a cylindrical shape whose inside in the radial direction (the radial direction with respect to the first axis A1) is hollow. A configuration in which the pump drive shaft 10a is arranged in the hollow portion is adopted. The pump drive shaft 10 a is disposed so as to be rotatable relative to the first rotor shaft 21.

  In the present embodiment, an in-shaft channel is formed inside the pump drive shaft 10a, and a part of the lubricating liquid discharged from the pump 10 is supplied to the in-axis channel. The lubricating liquid discharged from the pump 10 is supplied to the planetary gear mechanism 6 from the inner side in the radial direction (radial direction with reference to the first axis A1) via the in-axis flow path. ing.

  A first support bearing 91 that supports the first rotor shaft 21 is provided inside the second storage chamber S2 on the first axial direction L1 side with respect to the rotor body 11a of the first rotating electrical machine 11. In the present embodiment, the first support bearing 91 is supported by the end wall 62 on the first axial direction L1 side with respect to the rotor body 11a of the first rotating electrical machine 11 via the pump cover 40. Specifically, the pump cover 40 attached to the end wall 62 is integrally provided with a support protrusion 40a formed so as to protrude toward the second storage chamber S2. Here, the support protrusion 40 a is formed in a cylindrical shape coaxial with the axis of the first rotor shaft 21. And the 1st support bearing 91 is arrange | positioned at the internal peripheral surface of this support protrusion 40a. Thus, in the present embodiment, the first support bearing 91 is indirectly supported by the end wall 62 by being supported by the pump cover 40.

  The first rotor shaft 21 is supported by the first support bearing 91 so as to be rotatable with respect to the end wall 62 from the outside in the radial direction (the radial direction of the first axis A1). In this example, the first support bearing 91 is a rolling bearing provided with an outer ring, an inner ring, and rolling elements (balls in the example shown in FIG. 1). In the present embodiment, the first support bearing 91 corresponds to the “support bearing” in the present invention.

  In this example, the first rotor shaft 21 is disposed so as to penetrate the partition wall 61, and the first rotor shaft 21 is disposed in the radial direction (first shaft) at a portion of the partition wall 61 where the first rotor shaft 21 penetrates. A fourth support bearing 94 (in this example, a rolling bearing) that supports the outer side of the A1 radial direction) is provided.

  A second support bearing 92 that supports the second rotor shaft 22 is provided in the second storage chamber S2 on the first axial direction L1 side with respect to the rotor body 12a of the second rotating electrical machine 12. . In the present embodiment, the second support bearing 92 is directly supported by the end wall 62 on the first axial direction L1 side with respect to the rotor body 12a of the second rotating electrical machine 12. The second rotor shaft 22 is supported by the second support bearing 92 so as to be rotatable with respect to the end wall 62 from the outside in the radial direction R. In this example, the second support bearing 92 is a rolling bearing provided with an outer ring, an inner ring, and rolling elements (balls in the example shown in FIG. 1).

  As shown in FIG. 1, the second rotor shaft 22 is disposed so as to penetrate the partition wall 61. The second rotor shaft 22 is rotatably supported with respect to the case 60 from the outside in the radial direction R by a third support bearing 93 (in this example, a rolling bearing) provided inside the first storage chamber S1. A lubricating liquid supply portion 14 to which the lubricating liquid scraped up by the differential input gear 8a is supplied is provided in a portion of the second rotor shaft 22 located in the first storage chamber S1. Specifically, as described above, the communication channel 87 is formed in the case 60, and the end of the communication channel 87 opposite to the lubricating liquid receiving portion 90 is the axis of the second rotor shaft 22. It opens near the end on the second direction L2 side. As will be described later, the second rotor shaft 22 is formed in a hollow cylindrical shape, and the communication flow path from the lubricant receiving portion 90 to the opening of the second rotor shaft 22 on the second axial direction L2 side. The lubricating fluid that has flowed to 87 is supplied. That is, the opening on the second axial direction L2 side of the second rotor shaft 22 is the lubricating liquid supply portion 14.

  Further, a bearing (in this example, a rolling bearing) that supports the second rotor shaft 22 from the outside in the radial direction R is provided at a portion of the partition wall 61 that penetrates the second rotor shaft 22. In the present embodiment, the second rotor shaft 22 is supported by the second support bearing 92 from the first axial direction L1 side and is located in the second storage chamber S2 and the third support. The second shaft portion 22b supported by the bearing 93 from the second axial direction L2 side and mostly located in the first storage chamber S1 is coupled to each other in the axial direction (spline coupling in this example). ing. Therefore, in the present embodiment, the fifth support bearing 95 that supports the first shaft portion 22a and the sixth support bearing 96 that supports the second shaft portion 22b are provided in the partition 61 in the penetrating portion of the second rotor shaft 22. Are arranged adjacent to each other in the axial direction. In addition, as shown in FIG. 1, the 2nd rotary electric machine output gear 20 is integrally formed in the 2nd axial part 22b.

  The second rotor shaft 22 is formed in a cylindrical shape having a hollow inside in the radial direction R, and the hollow portion functions as the in-axis flow path 72. In the present embodiment, as described above, the second rotor shaft 22 is configured by connecting the first shaft portion 22a and the second shaft portion 22b to each other, and the first shaft portion 22a and the second shaft portion 22b. Are formed in a hollow cylindrical shape, and each hollow portion communicates in the axial direction. Thereby, the in-axis flow path 72 formed in the second rotor shaft 22 is connected to the lubricating liquid supply portion 14 which is the end portion on the second axial direction L2 side, and the first shaft located in the first storage chamber S1. The lubricating liquid that is configured to communicate with the end portion on the direction L1 side (hereinafter referred to as “target end portion 13”), and that is scraped up by the differential input gear 8a, is supplied to the lubricating liquid receiving portion 90 and the communication channel. 87, and supplied to the target end portion 13 of the second rotor shaft 22 through the in-axis flow path 72. As shown in FIG. 1, a shaft end chamber 83 for temporarily storing the lubricating liquid is formed between the target end portion 13 and the end wall 62.

  And inside the second storage chamber S2, the first support is provided from the target end 13 which is the end of the second rotor shaft 22 on the side opposite to the first storage chamber S1 (on the first axial direction L1 side). A radial flow path 71 for allowing the lubricating liquid to flow through the bearing 91 is formed. In this example, the second rotor shaft 22 includes the first shaft portion 22a and the second shaft portion 22b as described above, and the end portion of the first shaft portion 22a opposite to the partition wall 61 is the target end portion 13. It is said that. The target end 13 that is the supply source of the lubricating liquid to the radial flow path 71 and the first support bearing 91 that is the supply destination of the lubricating liquid of the radial flow path 71 are arranged at different positions in the radial direction R. Therefore, the radial flow path 71 is formed to extend at least in the radial direction R.

  In this embodiment, as shown in FIG. 1, the radial flow path 71 is formed in the end wall 62. Specifically, as shown in FIGS. 1 and 2, the radial flow path 71 includes a first step portion 81, a second step portion 82, and a joint portion flow path 86. That is, in the present embodiment, a part of the radial flow path 71 is formed by the first stepped portion 81 and the second stepped portion 82, and another part of the radial flow path 71 is a joint flow path. 86. In the present embodiment, as shown in FIG. 2, the first step portion 81 and the second step portion 82 are formed so as to extend in the radial direction of the second axis A2 (that is, the radial direction R), 86 is formed to extend in the radial direction of the first axis A1. In the present embodiment, the first step portion 81 and the second step portion 82 constitute a “step portion” in the present invention.

  The first step portion 81 and the second step portion 82 are formed on the inner surface of the end wall 62 and are configured to have step surfaces that face one side in the circumferential direction C and extend at least in the radial direction R. Yes. Specifically, in the present embodiment, a linear concave groove portion that is recessed toward the first axial direction L1 and extends in the radial direction R is formed on the inner surface of the end wall 62, and the concave groove portion is A first step portion 81 and a second step portion 82 are configured. Therefore, in the present embodiment, both the first stepped portion 81 and the second stepped portion 82 have a stepped surface facing one side in the circumferential direction C and a stepped facing the other side in the circumferential direction C, as shown in FIG. It comprises two step surfaces with the surface. In this example, the first step portion 81 and the second step portion 82 are formed so that the groove widths of the concave groove portions are different from each other (see FIG. 2), and the positions in the axial direction L are also mutually different. They are formed differently (see FIG. 1). Moreover, the concave groove-shaped part which comprises the 1st level | step-difference part 81 and the 2nd level | step-difference part 82 can be made into the groove-shaped part whose cross-sectional shape is a rectangular shape, U shape, or V shape, for example.

  The lubricating liquid supplied to the first stepped portion 81 from the end wall communication hole 84 (described later) is a stepped surface (normal line) located below the two stepped surfaces provided in the first stepped portion 81. It is supplied to the second step portion 82 while being mainly guided by a step surface having a component having an upward direction. Similarly, the lubricating liquid supplied to the second step portion 82 has a step surface located on the lower side of the two step surfaces provided in the second step portion 82 (the normal direction has an upward component). It is supplied to the junction channel 86 while being mainly guided by the stepped surface).

  Further, the junction channel 86 is formed along the junction between the end wall 62 and the pump cover 40. In the present embodiment, the joint channel 86 is formed in a linear shape extending in the radial direction of the first axis A1. Such a joint channel 86 may be formed by a recess (in this example, a linear recess) provided on at least one of the mating surface of the end wall 62 and the mating surface of the pump cover 40 in the joint. it can. In the present embodiment, the joint channel 86 is formed by a linear recess formed on the mating surface of the end wall 62 in the joint and extending in the radial direction of the first axis A1. It is possible to adopt a configuration in which a recess is formed in the mating surface of the pump cover 40 in addition to the mating surface of the end wall 62, or a configuration in which a recess is formed only in the mating surface of the pump cover 40. In addition, the recessed part for forming the junction part flow path 86 can be made into the recessed part whose cross-sectional shape is a rectangular shape, U shape, or V shape, for example.

  As shown in FIGS. 1 and 2, an end wall communication hole 84 is formed in the end wall 62 so as to communicate the shaft end chamber 83 and the upstream portion of the first step portion 81. In this example, the end wall communication hole 84 is configured by a hole formed in the end wall 62. Also, a pump cover communication hole that penetrates the pump cover 40 in the axial direction (the axial direction of the first axis A1) so as to communicate the downstream portion of the joint flow path 86 and the inner peripheral space of the support protrusion 40a. 85 is formed. As a result, the lubricating liquid that has been scraped up by the differential input gear 8a and supplied to the target end 13 is supplied to the end wall communication hole 84, the first stepped portion 81, the second stepped portion 82, the joint flow passage 86, and the pump. Via the cover communication hole 85, the first support bearing 91 is supplied to the inner peripheral space of the support protrusion 40a where the first support bearing 91 is disposed, and the first support bearing 91 is lubricated.

  As shown in FIG. 2, the second axis A2 on which the second rotor shaft 22 is arranged is located above the first axis A1 on which the first rotor shaft 21 is arranged. The lubricating liquid can be circulated from the target end 13 to the first support bearing 91 with a simple configuration.

  Further, in the present embodiment, the radial flow path 71 is formed so that the lubricating liquid also flows through the second support bearing 92. For this reason, the side surface of the second support bearing 92 is configured to communicate with the radial flow path 71. Specifically, as shown in FIG. 1, the second support bearing 92 is disposed so that the end portion on the side in the first axial direction L1 communicates with the shaft end chamber 83, and is scraped by the differential input gear 8a. A part of the lubricating liquid that is raised and supplied to the target end portion 13 is supplied to the second support bearing 92, and the second support bearing 92 is lubricated.

  Although a detailed description is omitted, a part of the lubricating liquid supplied to the inner circumferential space of the support protrusion 40a is supplied not only to the first support bearing 91 but also to the hollow portion of the first rotor shaft 21. Then, it is supplied to each part (for example, a cooling circuit or the like formed in the first rotating electrical machine 11) of the driving device 1 through the hollow part.

3. Other Embodiments Finally, other embodiments according to the present invention will be described. Note that the features disclosed in each of the following embodiments can be used only in that embodiment, and can be applied to other embodiments as long as no contradiction arises.

(1) In the above embodiment, the configuration in which the differential input gear 8a corresponds to the “scraping member” in the present invention has been described as an example. However, the embodiment of the present invention is not limited to this, and any rotating member (such as a gear) that rotates with the rotation of the output shaft 4 can be employed as the scraping member. In such a case, a dedicated member for scooping up the lubricating liquid may be provided separately.

(2) In the above embodiment, the configuration in which the end wall 62 supports the first support bearing 91 and the second support bearing 92 has been described as an example. However, the embodiment of the present invention is not limited to this, and at least one of the first support bearing 91 and the second support bearing 92 is supported by a portion of the case 60 other than the end wall 62. You can also.

(3) In the above embodiment, the configuration in which both the first step portion 81 and the second step portion 82 are formed to extend in the radial direction R has been described as an example. However, the embodiment of the present invention is not limited to this, and at least one of the first step portion 81 and the second step portion 82 is formed to extend in the circumferential direction C in addition to the radial direction R. It can be configured. In such a case, the stepped portion can be formed in a curved shape that is curved when viewed in the axial direction L.

(4) In the above-described embodiment, the configuration in which both the first stepped portion 81 and the second stepped portion 82 are formed by the groove-shaped portions formed on the inner surface of the end wall 62 has been described as an example. However, the embodiment of the present invention is not limited to this, and at least one of the first step portion 81 and the second step portion 82 protrudes from the inner surface of the end wall 62 toward the second axial direction L2. It is also possible to adopt a configuration formed by parts. Further, in the above-described embodiment, the configuration including the two stepped portions of the first stepped portion 81 and the second stepped portion 82 as the stepped portion has been described as an example, but the configuration including one or three or more stepped portions. It is also possible to adopt a configuration without a stepped portion.

(5) In the above-described embodiment, a configuration in which a part of the radial flow path 71 includes the joint flow path 86 formed along the joint between the end wall 62 and the pump cover 40 has been described as an example. However, the radial flow path 71 may not include the joint flow path 86. In such a configuration, for example, a flow path that connects the second stepped portion 82 and the pump cover communication hole 85 may be formed in the end wall 62 or the pump cover 40.

(6) In the above embodiment, the configuration in which the radial flow path 71 is formed in the end wall 62 has been described as an example. However, the embodiment of the present invention is not limited to this, and at least a part of the radial flow path 71 may be formed by a tubular member or a bowl-shaped member disposed in the case 60. Is possible.

(7) In the above embodiment, the second rotor shaft 22 has been described by taking as an example a configuration in which a plurality of (two in the above example) shaft portions are coupled to each other in the axial direction. It is also possible to form the shaft 22 by a single or three or more shaft portions coupled to each other.

(8) In the above embodiment, the configuration including the pump 10 that operates by the rotation of the input shaft 3 has been described as an example. However, the embodiment of the present invention is not limited to this, and the drive device 1 may be configured not to include a pump that operates by the rotation of the input shaft 3. In addition to the pump that operates by the rotation of the input shaft 3 or without the pump that operates by the rotation of the input shaft 3, the driving device 1 operates by another power (for example, electric power of the power storage device). It can also be set as the structure provided with pumps (for example, electric pump etc.).

(9) In the above embodiment, the configuration in which the input shaft 3 and the first rotor shaft 21 are arranged coaxially has been described as an example. However, the embodiment of the present invention is not limited to this, and the input shaft 3 and the first rotor shaft 21 may be arranged on different axes.

(10) In the above embodiment, a portion (stator core) of the stator 11b of the first rotating electrical machine 11 excluding the coil end portion 11c and a portion of the stator 12b of the second rotating electrical machine 12 excluding the coil end portion 12c (stator core) However, the structure arrange | positioned so that it may have an overlapping part by radial direction R view was demonstrated as an example. However, the embodiment of the present invention is not limited to this, and the shaft so that the stator core of the first rotating electrical machine 11 and the stator core of the second rotating electrical machine 12 do not overlap with each other in the radial direction R view. It can also be set as the structure arrange | positioned by shifting to the direction L. FIG. In this case, for example, only the coil end portions 11c and 12c of both the first rotating electrical machine 11 and the second rotating electrical machine 12 can be configured to have overlapping portions in the radial direction R view. . Moreover, it can also be set as the structure arrange | positioned so that the stator 11b of the 1st rotary electric machine 11 and the stator 12b of the 2nd rotary electric machine 12 may not have an overlapping part by radial direction R view.

(11) In the above embodiment, the configuration in which the first rotating electrical machine 11 and the second rotating electrical machine 12 are arranged on mutually different axes and parallel to each other has been described as an example. However, the embodiment of the present invention is not limited to this, and the first rotating electrical machine 11 and the second rotating electrical machine 12 are arranged on different axes and not parallel to each other (non-parallel). It can also be set as the structure made.

(12) In the above embodiment, the first support bearing 91, the second support bearing 92, the third support bearing 93, and the bearing provided in the partition wall 61 are all described as an example of a configuration in which they are rolling bearings. However, the embodiment of the present invention is not limited to this, and a bearing of another form such as a sliding bearing can be used as at least a part of these bearings.

(13) In the above embodiment, the case where the single pinion type planetary gear mechanism 6 including three rotating elements corresponds to the “differential gear mechanism” in the present invention has been described as an example. However, the embodiment of the present invention is not limited to this, and as a differential gear mechanism, a double pinion type planetary gear mechanism having three rotating elements, or four or more (for example, four) rotating elements. It is also possible to employ a differential gear mechanism provided with.

(14) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and embodiments of the present invention are not limited thereto. That is, as long as the configuration described in the claims of the present application and a configuration equivalent thereto are provided, a configuration obtained by appropriately modifying a part of the configuration not described in the claims is naturally also included in the present invention. Belongs to the technical scope.

  The present invention includes an input member drivingly connected to an internal combustion engine, a first rotating electrical machine, a second rotating electrical machine, an output member drivingly connected to a wheel, an input member, the first rotating electrical machine, and a second rotating electrical machine. The present invention can be suitably used in a vehicle drive device that includes a power transmission mechanism that transmits power to and from the output member, and a case.

1: Drive device (vehicle drive device)
2: Internal combustion engine 3: Input shaft (input member)
4: Output shaft (output member)
5: Wheel 6: Planetary gear mechanism (differential gear mechanism)
6a: first rotating element 6b: second rotating element 6c: third rotating element 8a: differential input gear (scraping member)
10: Pump 10b: Pump rotor (rotor)
10c: Pump chamber 11: First rotating electrical machine 11a: Rotor body 11b: Stator 12: Second rotating electrical machine 12a: Rotor body 12b: Stator 13: Target end 14: Lubricant supply part 21: First rotor shaft (rotor axis)
22: Second rotor shaft (rotor shaft)
40: Pump cover 41: Joint part 60: Case 61: Partition wall 62: End wall 71: Radial flow path 72: In-axis flow path 81: First step part (step part)
82: Second step portion (step portion)
91: First support bearing (support bearing)
92: Second support bearing 100: Power transmission mechanism L: Axial direction R: Radial direction C: Circumferential direction S: Space in case S1: First storage chamber S2: Second storage chamber

Claims (7)

An input member drivingly connected to the internal combustion engine, a first rotating electrical machine, a second rotating electrical machine, an output member drivingly connected to a wheel, the input member, the first rotating electrical machine, the second rotating electrical machine, and the A vehicle drive device including a power transmission mechanism that transmits power to and from an output member, and a case,
The rotor shaft of the second rotating electrical machine is disposed above the rotor shaft of the first rotating electrical machine,
The power transmission mechanism includes a scraping member that rotates with the rotation of the output member and scrapes up the lubricating liquid stored in the case during the rotation,
The case divides a space in the case in the axial direction of the second rotating electrical machine, and houses a first housing chamber in which the scraping member is housed, the first rotating electrical machine, and the second rotating electrical machine. Comprising a partition wall forming a second storage chamber;
A support bearing that supports the rotor shaft of the first rotating electrical machine is provided on the side opposite to the partition wall in the axial direction with respect to the rotor body of the first rotating electrical machine,
The second storage chamber extends at least in the radial direction of the second rotating electrical machine, and supports from the target end that is the end opposite to the first storage chamber side of the rotor shaft of the second rotating electrical machine. A radial flow path is formed through which the lubricating fluid flows through the bearing,
The rotor shaft of the second rotating electrical machine is disposed so as to penetrate the partition wall, and the lubricating liquid supply in which the lubricating liquid scraped up by the scraping member is supplied to a portion located in the first storage chamber Part
A vehicular drive device in which an in-shaft channel is formed in a rotor shaft of the second rotating electrical machine to communicate the lubricating liquid supply portion and the target end located in the second storage chamber. A second support bearing for supporting the rotor shaft of the second rotating electrical machine is provided on the opposite side of the partition in the axial direction with respect to the rotor body of the second rotating electrical machine,
2. The vehicle drive device according to claim 1, wherein the radial flow path is formed so that a lubricating liquid is also circulated through the second support bearing. 3. The support bearing is a first support bearing;
A second support bearing for supporting the rotor shaft of the second rotating electrical machine is provided on the opposite side of the partition in the axial direction with respect to the rotor body of the second rotating electrical machine,
The case includes an end wall that defines a side opposite to the partition wall in the axial direction of the second storage chamber,
The vehicle drive device according to claim 1, wherein the end wall supports the first support bearing and the second support bearing, and the radial flow path is formed in the end wall. The input member and the rotor shaft of the first rotating electrical machine are arranged coaxially,
A pump that operates by rotation of the input member, and a pump cover that is attached to the end wall from the inside of the second storage chamber and that forms a pump chamber for storing the rotor of the pump between the end wall And further comprising
The first support bearing is supported by the pump cover, and a part of the radial flow path is formed along a joint portion between the end wall and the pump cover. Vehicle drive device. On the inner surface of the end wall, a stepped portion is formed that has a stepped surface that faces at one side in the circumferential direction of the second rotating electrical machine and extends at least in the radial direction,
The vehicle drive device according to claim 3 or 4, wherein a part of the radial flow path is formed by the stepped portion.   The vehicle drive according to any one of claims 1 to 5, wherein the stator of the first rotating electrical machine and the stator of the second rotating electrical machine are disposed so as to have overlapping portions in the radial direction view. apparatus. A differential gear mechanism including at least three rotation elements, that is, a first rotation element, a second rotation element, and a third rotation element;
The first rotating electrical machine is drivingly connected to the first rotating element, the input member is drivingly connected to the second rotating element, and the third rotating element is not driven through the other rotating elements. The vehicle drive device according to any one of claims 1 to 6, wherein the second rotating electrical machine and the output member are drivingly connected to an element.

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