JP2014113890A - Vehicular drive device - Google Patents

Abstract

A vehicular drive device capable of cooling a rotating electric machine with oil with a relatively simple configuration is realized.
A vehicle drive device includes a first storage chamber 11 that houses a rotating electrical machine MG and an engagement device, and a second storage chamber 12 that houses a hydraulic control device 82 that controls the hydraulic pressure supplied to the engagement device. And a communication oil passage 20 that allows the first storage chamber 11 and the second storage chamber 12 to communicate with each other. The second storage chamber 12 is arranged so as to overlap the rotating electrical machine MG when viewed in the radial direction R in a partial region in the circumferential direction C. The first opening 21 that opens into the first storage chamber 11 of the communication oil passage 20 is disposed above the rotating electrical machine MG so as to overlap the rotating electrical machine MG when viewed in the vertical direction V. At least a part of the inner wall surface 12 a of the storage chamber 12 is disposed above the first opening 21.
[Selection] Figure 2

Description

  The present invention relates to a rotating electrical machine, an engaging device, a hydraulic control device that controls the hydraulic pressure supplied to the engaging device, a first storage chamber that houses the rotating electrical machine and the engaging device, and a second housing that houses the hydraulic control device. The present invention relates to a vehicle drive device including a case having a storage chamber.

  As such a vehicle drive device as described above, for example, a device described in Japanese Patent Application Laid-Open No. 2012-171371 (Patent Document 1) is known. Hereinafter, in the description of the background art section, the names and symbols in Patent Document 1 are quoted in []. In the configuration of Patent Document 1, a hydraulic control device [second hydraulic control device VB2] that controls the hydraulic pressure supplied to the engagement device [internal combustion engine separation clutch C1] is provided, and a second storage chamber [oil-tight chamber] is provided from the hydraulic control device. The oil discharged (drained) inside OT2] is sent out to a storage chamber [oil storage portion OT1] that stores oil sucked by the hydraulic pump.

  By the way, the rotating electrical machine may be cooled using oil circulating in the case. However, Patent Document 1 does not describe any cooling of the rotating electrical machine using oil.

JP2012-171371 (paragraph 0040 etc.)

  Therefore, it is desired to realize a vehicle drive device that can cool the rotating electrical machine with oil with a relatively simple configuration.

  According to the present invention, a rotating electrical machine, an engagement device, a hydraulic control device that controls a hydraulic pressure supplied to the engagement device, a first storage chamber that houses the rotating electrical machine and the engagement device, and the hydraulic control device And a case having a second storage chamber for storing the first storage chamber, the characteristic configuration of the vehicle drive device includes a communication oil passage that communicates the first storage chamber and the second storage chamber, and the second storage The chamber is arranged so as to overlap with the rotating electrical machine when viewed in a radial direction based on the rotational axis in a partial region in the circumferential direction based on the rotational axis of the rotating electrical machine, The first opening that opens into the first storage chamber of the communication oil passage is located above the rotating electrical machine and is disposed so as to overlap the rotating electrical machine when viewed in the vertical direction. At least a part of the inner wall surface is disposed above the first opening. There is a point.

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.
Further, in the present application, regarding the arrangement of two members, “overlapping when seen in a certain direction” means that when a virtual straight line parallel to the line-of-sight direction is moved in each direction orthogonal to the virtual straight line, It means that a region where a straight line intersects both of the two members exists at least in part.

According to the above characteristic configuration, the first opening of the communication oil passage is located above the rotating electrical machine and overlaps the rotating electrical machine when viewed in the vertical direction. The oil can be supplied to the rotating electrical machine and the rotating electrical machine can be cooled simply by dripping. At this time, since at least a part of the inner wall surface of the second storage chamber is arranged above the first opening, the oil in the second storage chamber is passed through the communication oil passage with a simple configuration using gravity. Via the first storage chamber.
Moreover, according to said characteristic structure, a 2nd storage chamber overlaps seeing in radial direction in the one part area | region of the circumferential direction with respect to the rotary electric machine which is the supply object of the oil from the said 2nd storage chamber. Are arranged as follows. Therefore, the length of the communication oil passage that communicates the first storage chamber and the second storage chamber can be shortened to simplify the configuration of the communication oil passage.
As described above, according to the above-described characteristic configuration, it is possible to realize a vehicle drive device that can cool a rotating electrical machine using oil with a relatively simple configuration.

  Here, the hydraulic control device includes a valve body driving unit that drives a valve body of the hydraulic control valve, and is opened to a lowermost portion of the first opening and the second storage chamber of the communication oil passage. It is preferable that at least one of the lowermost part of the opening is arranged above the lowermost part of the valve body driving part.

  According to this configuration, when the lowest position of the oil level in the second storage chamber is determined according to the higher height of the lowermost part of the first opening and the lowermost part of the second opening, At least a part of the valve body drive unit is positioned below the oil level, and the valve body drive unit can be cooled with oil.

  As described above, in the configuration in which the hydraulic control device includes the valve body drive unit, at least a part of the second storage chamber is disposed below the uppermost part of the rotating electrical machine, and the case includes the first A partition wall that separates the one storage chamber from the second storage chamber, the partition wall having an inclined surface inclined with respect to a horizontal plane on the second storage chamber side, and the second opening portion It is preferable that the first opening and the lowermost part of the valve body driving unit are formed on the inclined surface and below the second opening.

  According to this configuration, the oil storage portion in which the lowest position of the oil level is determined according to the height of the lowermost portion of the second opening, using the portion below the second opening in the inclined surface, Two storage chambers can be formed. Therefore, the structure which cools a valve body drive part with oil is realizable, suppressing complication of the structure of a 2nd storage chamber.

  Alternatively, the hydraulic control device includes a valve body drive unit that drives a valve body of a hydraulic control valve, the entire second storage chamber is disposed above the uppermost part of the rotating electrical machine, and the case includes the case, A partition wall separating the first storage chamber and the second storage chamber; and a partition wall extending from the partition wall toward the outside in the radial direction inside the second storage chamber; A second opening that opens into the storage chamber is formed on the opposite side of the partition wall in the partition from the valve body drive unit, and a lowermost part of the upper surface of the partition wall is a lowermost part of the valve body drive part The partition wall is formed so as to be positioned on the upper side, and the first opening is preferably disposed below the second opening.

  According to this configuration, the oil storage portion in which the lowest position of the oil level is determined according to the height of the lowermost portion of the upper surface of the partition wall is formed in the portion where the valve body driving portion is arranged in the second storage chamber. The valve body drive unit can be cooled by the oil in the oil storage unit.

  In the vehicle drive device having each configuration described above, the rotating electrical machine is provided in a power transmission path that connects an input member that is drivingly connected to an internal combustion engine and an output member that is drivingly connected to a wheel, and the engagement device includes: It is preferable that the power transmission path is provided between the input member and the rotating electrical machine.

  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 device or a meshing engagement device may be included.

  According to this configuration, in the case where an internal combustion engine is provided in addition to the rotating electrical machine as a driving force source for the wheels, when the vehicle is driven only by the torque of the rotating electrical machine, by controlling the engagement device to be released, By disconnecting the internal combustion engine from the wheels, energy loss due to drag loss of the internal combustion engine can be suppressed. And according to this invention, it becomes easy to arrange | position the hydraulic control apparatus which controls the hydraulic pressure supplied to such an engagement apparatus above the said engagement apparatus. Therefore, compared with the case where the hydraulic control device is disposed below the engagement device, it is possible to suppress the oil in the engagement device from dropping out from the oil passage connecting the hydraulic control device and the engagement device. Therefore, with a simple configuration using gravity, it is possible to prevent the oil from dropping off when the vehicle is stopped for a long period of time, and to ensure the responsiveness of the engagement device.

It is a mimetic diagram showing a schematic structure of a vehicle drive device concerning a first embodiment of the present invention. It is a figure which shows the cross-sectional shape orthogonal to the axial direction of the vehicle drive device which concerns on 1st embodiment of this invention. It is the figure which looked at the 2nd hydraulic control apparatus which concerns on 1st embodiment of this invention from the direction orthogonal to the inclined surface of a partition. 1 is a partial cross-sectional view of a vehicle drive device according to a first embodiment of the present invention. It is a figure which shows the cross-sectional shape orthogonal to the axial direction of the vehicle drive device which concerns on 2nd embodiment of this invention. FIG. 5 is a partial cross-sectional view of a vehicle drive device according to a second embodiment of the present invention. It is a figure which shows the cross-sectional shape orthogonal to the axial direction of the vehicle drive device which concerns on 3rd embodiment of this invention.

1. First Embodiment A first embodiment of a vehicle drive device according to the present invention will be described with reference to FIGS. In the following description, unless otherwise specified, the “axial direction L”, “radial direction R”, and “circumferential direction C” are the rotational axis X (see FIG. 2) of the rotating electrical machine MG. It is defined as a standard. In the following description, “upper” and “lower” are defined with reference to the vertical direction V (see FIG. 2) in a state where the vehicle drive device 1 is mounted on a vehicle (vehicle mounted state). "Upper" represents the upper part in FIG. 2, and "Lower" represents the lower part in FIG. In addition, the term regarding the direction, position, etc. about each member is used as a concept including the state which has a difference by an error (error of the grade which can be accept | permitted on manufacture).

1-1. Overall Configuration of Vehicle Drive Device As shown in FIG. 1, a vehicle drive device 1 according to the present embodiment controls a rotary electric machine MG, a first clutch C1, and a hydraulic pressure supplied to the first clutch C1. A hydraulic control device 82 and a case 3 are provided. As shown in FIGS. 1 and 2, the case 3 includes a first storage chamber 11 that stores the rotating electrical machine MG and the first clutch C <b> 1, and a second storage chamber 12 that stores the second hydraulic control device 82. In the present embodiment, the first clutch C1 corresponds to the “engagement device” in the present invention, and the second hydraulic control device 82 corresponds to the “hydraulic control device” in the present invention.

  As shown in FIG. 1, in the present embodiment, the vehicle drive device 1 is further drive-connected to an input shaft I that is drivingly connected to the internal combustion engine E, a torque converter TC, a speed change mechanism TM, and wheels W. Output shaft O. In the power transmission path connecting the input shaft I and the output shaft O, the first clutch C1, the rotating electrical machine MG, the torque converter TC, and the speed change mechanism TM are provided in the order described from the input shaft I side. That is, in the present embodiment, the rotating electrical machine MG is provided in a power transmission path that connects the input shaft I and the output shaft O, and the first clutch C1 includes the input shaft I and the rotating electrical machine MG in the power transmission path. It is provided between. In the present embodiment, the input shaft I corresponds to the “input member” in the present invention, and the output shaft O corresponds to the “output member” in the present invention.

  The internal combustion engine E is a prime mover (for example, a gasoline engine, a diesel engine, etc.) that is driven by combustion of fuel inside the engine to extract power. In the present embodiment, the input shaft I is drivingly connected so as to rotate integrally with the output shaft (crankshaft or the like) of the internal combustion engine E. It is also possible to adopt a configuration in which the input shaft I is drivingly connected to the output shaft of the internal combustion engine E via a damper or the like.

  The first clutch C1 is provided in a power transmission path between the internal combustion engine E and the rotating electrical machine MG, and functions as an internal combustion engine disconnecting engagement device that disconnects the internal combustion engine E from the wheels W, the rotating electrical machine MG, and the like. Specifically, the first clutch C1 includes an input side engaging member that is drivingly connected to the input shaft I, and an output side engaging member that is drivingly connected to the rotor Ro of the rotating electrical machine MG. A state where the internal combustion engine E and the rotating electrical machine MG are connected and a state where the internal combustion engine E and the rotating electrical machine MG are separated are selectively realized according to the state of engagement of the first clutch C1. That is, in the state where the first clutch C1 is engaged (in this example, the state where the direct clutch is engaged or the state where the clutch is engaged), the connection between the internal combustion engine E and the rotating electrical machine MG is maintained. When one clutch C1 is released, the connection between the internal combustion engine E and the rotating electrical machine MG is released.

  The first clutch C1 is a hydraulically driven engagement device provided with a hydraulic servo mechanism that operates in accordance with supplied hydraulic pressure. In the present embodiment, the first clutch C1 is configured as a wet multi-plate clutch mechanism. Specifically, although not shown, the first clutch C1 includes a working hydraulic pressure chamber and a circulation hydraulic pressure chamber that are separately arranged on both sides of the piston in the sliding direction of the piston. As will be described later, the hydraulic pressure chamber is supplied with hydraulic pressure for operating the piston from the second hydraulic pressure control device 82, and the circulating hydraulic pressure chamber is supplied with hydraulic pressure for cooling the friction member of the first clutch C1. Supplied from the hydraulic control device 82. Then, the first clutch C1 is engaged by controlling the hydraulic pressure in the working hydraulic chamber and sliding the piston in accordance with the difference (differential pressure) between the hydraulic pressure in the working hydraulic chamber and the hydraulic pressure in the circulating hydraulic chamber. Is controlled. In addition to the supply path for supplying oil from the second hydraulic control device 82 to the circulation hydraulic chamber, a discharge path for discharging oil from the circulation hydraulic chamber is formed. The friction member of the first clutch C1 is cooled by the circulating oil. The circulating hydraulic chamber is basically filled with oil having a predetermined hydraulic pressure or higher while the vehicle is traveling.

  The torque converter TC includes a pump impeller 41 that is drivingly connected to the rotating electrical machine MG, a turbine runner 42 that is drivingly connected to the speed change mechanism TM via the intermediate shaft M, and a second clutch C2 as a lock-up engagement device. I have. The pump impeller 41 is drivingly connected to a pump driving shaft 9a that drives the hydraulic pump 9 (in this example, drivingly connected so as to rotate integrally). The hydraulic pump 9 is driven by an internal combustion engine E or a rotating electrical machine MG as a driving force source for the wheels W to discharge oil. In the present embodiment, the hydraulic pump 9 sucks oil stored in a fourth storage chamber 14 to be described later to generate hydraulic pressure. The hydraulic pressure generated by the hydraulic pump 9 is controlled by a first hydraulic control device 81 described later, and the controlled hydraulic pressure is supplied to the torque converter TC and the speed change mechanism TM, and the second hydraulic control device 82 described later. The controlled hydraulic pressure is supplied to the first clutch C1. In the present embodiment, the second clutch C2 is a hydraulically driven engagement device provided with a hydraulic servo mechanism that operates in accordance with the supplied hydraulic pressure, like the first clutch C1.

  The speed change mechanism TM is composed of a mechanism (for example, an automatic stepped speed change mechanism) that can change the speed ratio stepwise or steplessly, and changes the rotational speed of the intermediate shaft M (speed change input shaft) at the current speed ratio. Then, it is transmitted to the output shaft O (transmission output shaft) connected to the output differential gear device DF. In the present embodiment, the speed change mechanism TM is drivably coupled to the rotating electrical machine MG via the torque converter TC. It is also possible to adopt a configuration in which the speed change mechanism TM is drivingly connected to the rotating electrical machine MG without going through the torque converter TC, for example, a configuration in which the intermediate shaft M is drivingly connected so as to rotate integrally with the rotor Ro of the rotating electrical machine MG. It is. Further, instead of the torque converter TC, an ordinary fluid coupling that does not have a torque amplification function may be provided.

  The output shaft O is drivingly connected to the wheels W via the output differential gear device DF, and the rotation and torque transmitted to the output shaft O are transmitted to the left and right wheels via the output differential gear device DF. It is distributed to W and transmitted. Accordingly, the vehicle drive device 1 can cause the vehicle to travel by transmitting the torque of one or both of the internal combustion engine E and the rotating electrical machine MG to the wheels W. That is, the vehicle drive device 1 is configured as a drive device for a hybrid vehicle, and more specifically, is configured as a one-motor parallel type hybrid drive device.

  In the present embodiment, as shown in FIG. 1, the input shaft I, the first clutch C1, the rotating electrical machine MG, the torque converter TC, the intermediate shaft M, the speed change mechanism TM, and the output shaft O all have a rotational axis X ( The vehicle drive device 1 according to the present embodiment has a uniaxial configuration suitable for mounting on a FR (Front Engine Rear Drive) type vehicle.

1-2. Hydraulic Supply Configuration The vehicle drive device 1 includes a hydraulic control device that controls the hydraulic pressure supplied from the hydraulic pump 9. In the present embodiment, as shown in FIG. 1, the vehicle drive device 1 includes a first hydraulic control device 81 and a second hydraulic control device 82 that are separated from each other as the hydraulic control device. The first hydraulic control device 81 is a device that controls the hydraulic pressure supplied from the hydraulic pump 9 and supplies the controlled hydraulic pressure to the torque converter TC and the speed change mechanism TM. The hydraulic pressure supplied to the speed change mechanism TM is used to control the engagement state of each engagement device provided in the speed change mechanism TM, and is used to lubricate and cool the gear mechanism and the bearing provided in the speed change mechanism TM. The hydraulic pressure supplied to the torque converter TC is used as power transmission oil in the torque converter TC and also supplied to the working hydraulic chamber of the second clutch C2 to control the engagement state of the second clutch C2. Used to do. The oil that has been supplied to the speed change mechanism TM and the torque converter TC is returned to a later-described fourth storage chamber 14 disposed below the speed change mechanism TM.

  The line pressure that is the discharge pressure (output pressure) of the hydraulic pump 9 is controlled by a line pressure control valve (not shown). For example, a pressure regulator valve is used as the line pressure control valve, and the line pressure is controlled based on the reference pressure supplied to the reference pressure chamber. In the present embodiment, the line pressure control valve is provided in the first hydraulic pressure control device 81, and the hydraulic pressure controlled (pressure regulation) by the line pressure control valve is passed through the first oil passage 91 (see FIG. 4). To the second hydraulic control device 82. In the example shown in FIG. 4, the first oil passage 91 is formed inside the wall portion of the case 3 (specifically, a first case portion 3 a to be described later). It is also possible to form it using a tubular member or a hook-like member arranged inside or outside. Similarly, a second oil passage 92 and a third oil passage 93 to be described later can be formed using a tubular member, a bowl-like member, or the like disposed inside or outside the case 3.

  The second hydraulic control device 82 is a device that controls the hydraulic pressure supplied from the hydraulic pump 9 and supplies the controlled hydraulic pressure to the first clutch C1. In the present embodiment, as described above, the oil discharged from the hydraulic pump 9 is supplied to the second hydraulic control device 82 via the first hydraulic control device 81 and the first oil passage 91. As shown in FIG. 1, the second hydraulic control device 82 is disposed closer to the rotating electrical machine MG and the first clutch C1 in the axial direction L (see FIG. 4) than the first hydraulic control device 81.

  As shown in FIGS. 2 to 4, the second hydraulic control device 82 includes a hydraulic control valve and a valve body 83 provided with an oil passage communicating with the hydraulic control valve. In the present embodiment, the second hydraulic control device 82 includes a first hydraulic control valve 71 and a second hydraulic control valve 72 as hydraulic control valves. The first hydraulic control valve 71 is a hydraulic control valve that controls the hydraulic pressure supplied to the working hydraulic chamber of the first clutch C1, and the hydraulic pressure after the control by the first hydraulic control valve 71 is the second oil passage 92 (FIG. 4). And the hydraulic pressure chamber is supplied to the working hydraulic chamber. The second hydraulic control valve 72 is a hydraulic control valve that controls (regulates) the hydraulic pressure supplied to the circulation hydraulic chamber of the first clutch C1, and the hydraulic pressure after the control by the second hydraulic control valve 72 is the third oil passage. 93 (see FIG. 4) is supplied to the circulating hydraulic chamber. The oil after being supplied to the working hydraulic pressure chamber and the circulation hydraulic pressure chamber is returned to a fourth storage chamber 14 described later via a discharge oil passage or the like (not shown). In the example shown in FIG. 4, each of the first oil passage 91, the second oil passage 92, and the third oil passage 93 is inside the wall portion of the case 3 (specifically, a first case portion 3 a described later). Are formed at different positions.

  As shown in FIGS. 2 to 4, the second hydraulic control device 82 includes a valve body drive unit 71 a that drives the valve body of the first hydraulic control valve 71. The valve body drive unit 71a functions as an actuator that controls the state of the valve body of the first hydraulic control valve 71 (in this example, the position of the valve body). In the present embodiment, the first hydraulic control valve 71 is a linear solenoid valve, and a pressure adjusting unit 71b having a spool as a valve body, and a valve body driving unit 71a that controls the position of the valve body (spool) by electromagnetic force. With. That is, in the present embodiment, the valve body driving unit 71 a functions as an electromagnetic unit and is provided in the first hydraulic control valve 71. The first hydraulic control valve 71 includes a connector portion 71c, and electric power is supplied to the valve body drive portion 71a via a wiring member connected to the connector portion 71c. The connector portion 71c is provided so as to protrude from the cylindrical outer peripheral surface of the valve body driving portion 71a to the outside in the radial direction with reference to the outer peripheral surface. And the hydraulic oil according to the energization state via the connector part 71c to the valve body drive part 71a is supplied to the working hydraulic pressure chamber of the first clutch C1. In the present embodiment, the first hydraulic control valve 71 corresponds to the “hydraulic control valve” in the present invention.

  In the present embodiment, the second hydraulic control valve 72 is a pressure regulating valve that performs both opening and closing of the input port and opening and closing of the discharge port (drain port), although not shown. As the second hydraulic control valve 72, it is possible to use a pressure regulating valve of a type that only opens and closes the discharge port.

  As shown in FIG. 3, in the present embodiment, the first hydraulic control valve 71 is fixed to the valve body 83 in a state where the pressure adjusting portion 71 b is inserted into a valve insertion hole formed in the valve body 83. Yes. That is, the valve body drive unit 71 a is disposed so as to be exposed to the outside of the valve body 83. Specifically, the valve body drive unit 71a has a cylindrical outer peripheral surface, and the outer peripheral surface is outside the valve body 83 in the entire axial direction with respect to the outer peripheral surface as shown in FIG. It is arranged to be exposed to. The second hydraulic control valve 72 is fixed to the valve body 83 in a state where the entire second hydraulic control valve 72 is inserted into a valve insertion hole formed in the valve body 83. A valve insertion hole for inserting the pressure adjusting portion 71b of the first hydraulic control valve 71 and a valve insertion hole for inserting the second hydraulic control valve 72 partially form the outer peripheral surface of the inserted portion in the valve body 83. It may be configured to be exposed to the outside. 2 to 4, the valve insertion hole is shown integrally with the hydraulic control valve for simplification.

1-3. Configuration of Case As shown in FIG. 1, the case 3 includes a first storage chamber 11 and a second storage chamber 12, in which the rotating electrical machine MG and the first clutch C <b> 1 are stored, A second hydraulic control device 82 is accommodated in the accommodation chamber 12. In the present embodiment, the case 3 further includes a storage chamber that stores the torque converter TC, the transmission mechanism TM, and the first hydraulic control device 81.

  Specifically, in the present embodiment, the case 3 includes a first case portion 3a and a second case portion 3b that are divided in the axial direction L. The first case portion 3 a is a case member that forms the first storage chamber 11 and the second storage chamber 12. In the present embodiment, as shown in FIG. 1, the first clutch C <b> 1 is disposed inside the first storage chamber 11 in the radial direction R from the rotor Ro of the rotating electrical machine MG. In the present embodiment, as shown in FIG. 1, the first clutch C <b> 1 is arranged in the first storage chamber 11 so as to overlap the rotating electrical machine MG when viewed in the radial direction R. In FIG. 2, the rotor Ro is shown in a simplified manner, and the first clutch C1 is not shown.

  As shown in FIG. 1, the second case portion 3 b is a case member that forms a third housing chamber 13 that houses the speed change mechanism TM and a fourth housing chamber 14 that houses the first hydraulic control device 81. The second case portion 3b has a cylindrical peripheral wall that covers the outer peripheral surface of the speed change mechanism TM, and a third accommodation chamber 13 is formed inside the radial direction R of the peripheral wall. Moreover, the 4th storage chamber 14 is formed of the space divided by the surrounding wall of the 2nd case part 3b, and the 1st cover member 31 fixed to the outer surface of the said surrounding wall. In the present embodiment, the first cover member 31 is fixed to the lower portion of the second case portion 3b, and the first hydraulic control device 81 is disposed below the speed change mechanism TM. In the present embodiment, the first case portion 3a and the second case portion 3b cooperate with each other in a region in the axial direction L including the joint portion 2 between the first case portion 3a and the second case portion 3b, and the torque converter. A storage chamber for storing the TC is formed.

  As shown in FIG. 2, the first case portion 3 a has a cylindrical peripheral wall 6 that covers the outer peripheral surface of the rotating electrical machine MG, and the first storage chamber 11 is formed inside the peripheral wall 6 in the radial direction R. . The rotating electrical machine MG includes a stator St fixed to the peripheral wall 6 and a rotor Ro that is rotatably supported on the inner side in the radial direction R of the stator St. As shown in FIG. 1, the stator St includes coil end portions Ce on both sides in the axial direction L. In addition, the second storage chamber 12 is defined by the peripheral wall 6 and the second cover member 32 fixed to the outer surface of the peripheral wall 6. That is, the second storage chamber 12 is formed outside the first storage chamber 11 in the radial direction R, and the first storage chamber 11 and the second storage chamber 12 are separated in the radial direction R by the partition 4. Yes. In this embodiment, the partition 4 which separates the 1st storage chamber 11 and the 2nd storage chamber 12 is formed by a part of surrounding wall 6 of the 1st case part 3a. The surface of the partition wall 4 on the second storage chamber 12 side is a flat surface, and the second hydraulic control device 82 is fixed to the flat surface. Thus, the 1st storage chamber 11 and the 2nd storage chamber 12 are arrange | positioned so that the partition 4 may be adjoined (specifically, it adjoins to radial direction R).

  Specifically, in this embodiment, a pedestal portion 8 is formed on the outer surface of the peripheral wall 6. The pedestal portion 8 is provided such that a space surrounded by the pedestal portion 8 is a tank-shaped space that opens to the outside in the radial direction R. That is, the base 8 is formed so as to surround the second hydraulic control device 82 over the entire circumference when viewed in the radial direction R. In the present embodiment, the second storage chamber 12 is a rectangular parallelepiped space surrounded by the pedestal portion 8 and the second cover member 32 fixed (fastened and fixed in this example) to the pedestal portion 8. ing.

  As shown in FIG. 4, the second storage chamber 12 and the second hydraulic control device 82 stored in the second storage chamber 12 are arranged such that the position in the axial direction L overlaps with the rotating electrical machine MG. That is, the second storage chamber 12 and the second hydraulic control device 82 are disposed so as to overlap the rotating electrical machine MG when viewed in the radial direction R in a partial region in the circumferential direction C. In the present embodiment, the second storage chamber 12 overlaps the entire stator St including the coil end portions Ce on both sides in the axial direction L when viewed in the radial direction R in a partial region in the circumferential direction C. Is arranged.

  As shown in FIGS. 2 to 4, the vehicle drive device 1 includes a communication oil passage 20 that connects the first storage chamber 11 and the second storage chamber 12. In this embodiment, as shown in FIG.2 and FIG.4, the communication oil path 20 is formed using the oil path formation member 7 fixed to the internal peripheral surface of the surrounding wall 6 of the 1st case part 3a. The oil passage forming member 7 is disposed between the peripheral wall 6 in the radial direction R and the rotating electrical machine MG. The oil passage forming member 7 is axially disposed in a partial region in the circumferential direction C (a region in the circumferential direction C including the uppermost portion of the inner peripheral surface of the peripheral wall 6 in this example) between the oil passage forming member 7 and the inner peripheral surface of the peripheral wall 6. An internal space extending to L is formed. In the present embodiment, as shown in FIG. 2, the cross-sectional shape orthogonal to the axial direction L of the internal space is formed in an arc shape having a width in the radial direction R. In the present embodiment, as shown in FIG. 4, the internal space is farther away from the coil end portion Ce than the coil end portion Ce on the both sides in the axial direction L (from the main body (core) of the stator St). Side).

  As shown in FIG. 2 and FIG. 4, a hole that penetrates the portion along the radial direction R is formed in a portion that divides the inner space in the radial direction R in the oil passage forming member 7. A first opening 21 that is an opening that opens into the first storage chamber 11 of the communication oil passage 20 is formed by the inner end of the hole in the radial direction R. In the present embodiment, the first opening 21 is formed at a position overlapping the rotation axis X when viewed in the vertical direction V. In addition, a hole portion that penetrates the outer space in the radial direction R of the inner space in the partition wall 4 is formed with a hole that penetrates the portion along the radial direction R. A second opening 22 that is an opening that opens into the second storage chamber 12 of the communication oil passage 20 is formed by the end. As shown in FIGS. 3 and 4, the second opening portion 22 is formed at a position different from the contact portion with the second hydraulic control device 82 on the surface of the partition wall 4 on the second storage chamber 12 side. . As shown in FIG. 2, the second opening 22 is formed at a different position in the circumferential direction C from the first opening 21. Furthermore, as shown in FIG. 4, the second opening 22 is formed at a position different from the first opening 21 in the axial direction L. Specifically, in the present embodiment, two first openings 21 and one second opening 22 are formed, and the second openings 22 are the two first openings in the axial direction L. 21.

  The second storage chamber 12 is configured to be able to discharge oil from the second storage chamber 12 via the communication oil passage 20. Since the second hydraulic control device 82 is stored in the second storage chamber 12, the oil discharged (drained) from the second hydraulic control device 82 is supplied into the second storage chamber 12. As shown in FIG. 2, at least a part of the inner wall surface 12 a of the second storage chamber 12 is disposed above the first opening 21. In other words, the second storage chamber 12 has a portion disposed above the first opening 21. Thus, as schematically shown in FIG. 2 and FIG. 4, the oil discharged from the second hydraulic control device 82 into the second storage chamber 12 is simply configured using gravity. After flowing into the communication oil passage 20 through the second opening 22, it can be supplied into the first storage chamber 11 through the first opening 21. As will be described later, the oil supplied into the first storage chamber 11 is used for cooling the rotating electrical machine MG. That is, as compared with the case where the second hydraulic control device 82 is disposed below the first storage chamber 11, the oil discharged into the second storage chamber 12 is effectively used (in this example, cooling of the rotating electrical machine MG). Efficient). Note that the oil leaked from the gap of the valve body 83 is discharged into the second storage chamber 12. In addition, discharged oil (drain oil) from the first hydraulic control valve 71 when the engagement state of the first clutch C <b> 1 is changed is also discharged into the second storage chamber 12.

  2 and 4, the first opening 21 is disposed above the rotating electrical machine MG so as to overlap the rotating electrical machine MG when viewed in the vertical direction V. In the present embodiment, the entire first opening 21 is disposed so as to overlap the rotating electrical machine MG when viewed in the vertical direction V. Thereby, the oil supplied to the 1st accommodating chamber 11 from the 1st opening part 21 can be supplied to the rotary electric machine MG, and the rotary electric machine MG can be cooled. In the present embodiment, as shown in FIG. 4, a pair of first openings 21 is formed corresponding to each of the coil end portions Ce on both sides in the axial direction L, and each of the pair of first openings 21 is The coil end portion Ce and the corresponding coil end portion Ce are disposed at the same position in the axial direction L and above the coil end portion Ce (in this example, above the uppermost portion of the coil end portion Ce). Therefore, it is possible to efficiently cool the coil end portion Ce by supplying the oil guided to the first storage chamber 11 via the communication oil passage 20 to the coil end portion Ce.

  In the present embodiment, as shown in FIG. 2, the surface of the partition wall 4 on the second storage chamber 12 side is an inclined surface 4 a that is inclined at an angle of less than 90 degrees with respect to the horizontal plane. That is, in the present embodiment, the second hydraulic control device 82 is fixed to a surface formed on the outer surface of the peripheral wall 6 and inclined at an angle of less than 90 degrees with respect to the horizontal plane. The second hydraulic control device 82 is disposed so as to overlap with the rotating electrical machine MG when viewed in the vertical direction V and to overlap with the rotating electrical machine MG when viewed in the horizontal direction orthogonal to the rotation axis X. And as shown in FIG. 2, the 2nd opening part 22 is formed above the lowest part of the said inclined surface 4a. Therefore, in the present embodiment, the lower part of the second storage chamber 12 functions as the oil reservoir 50 that stores the oil discharged from the second hydraulic control device 82. Further, the communication oil passage 20 is partitioned in an oil-tight manner at portions other than the first opening 21 and the second opening 22. Therefore, the oil level of the oil reservoir 50 can change according to the state of the second hydraulic control device 82, etc., but the lowest position within the change range of the oil level is the lowest part of the first opening 21 and the second position. It is determined in accordance with the height (position in the vertical direction V) of the lowermost part of the two openings 22 (in this example, the lowermost part of the second opening 22). In the illustrated example, the lowest position of the oil level of the oil reservoir 50 is the same height as the lowermost portion of the second opening 22.

  In view of this point, in the present embodiment, at least one of the lowermost portion of the first opening portion 21 and the lowermost portion of the second opening portion 22 is disposed above the lowermost portion of the valve element driving portion 71a. Is adopted. By adopting such a configuration, at least a part of the valve body drive unit 71a is basically positioned below the oil surface of the oil storage unit 50, so that the valve body drive unit 71a is oil of the oil storage unit 50. It is possible to cool by. In the present embodiment, as shown in FIG. 2, the lowermost portion of the first opening 21 is disposed below the lowermost portion of the valve body driving portion 71a, and the lowermost portion of the second opening 22 is the valve body. It arrange | positions above the lowermost part of the drive part 71a. Accordingly, the first opening 21 and the lowermost part of the valve body driving unit 71a are disposed below the second opening 22. Further, in the present embodiment, as shown in FIG. 2, at least a part of the second storage chamber 12 (only a part on the lower side in this example) is the uppermost part of the rotating electrical machine MG (in this example, the stator St). It is arranged below the uppermost part.

  In the present embodiment, as shown in FIG. 2, both the lowermost part of the first opening 21 and the lowermost part of the second opening 22 are from the uppermost part of the inner wall surface 12 a of the second storage chamber 12. Is also arranged on the lower side. Therefore, the second storage chamber 12 is basically in a state having a space that is partially free of oil, and as a result, the oil discharge resistance from the second hydraulic control device 82 can be kept small.

2. Second Embodiment A second embodiment of the vehicle drive device according to the present invention will be described with reference to FIGS. This embodiment differs from the first embodiment in that the entire second storage chamber 12 is disposed above the uppermost part of the rotating electrical machine MG. Below, it demonstrates centering around difference with said 1st embodiment, and it is the same as that of said 1st embodiment about the point which is not specified clearly.

  As shown in FIG. 5, in this embodiment, the surface of the partition wall 4 on the second storage chamber 12 side is formed in parallel to the horizontal plane. That is, in the present embodiment, the second hydraulic control device 82 is fixed to a surface formed on the outer surface of the peripheral wall 6 and parallel to the horizontal plane. The entire second storage chamber 12 is disposed above the uppermost portion of the rotating electrical machine MG, and the second hydraulic control device 82 (the entire second hydraulic control device 82 in this example) is arranged in the vertical direction V. It is arranged so as to overlap with the rotating electrical machine MG as seen.

  As shown in FIG. 6, in this embodiment, the case 3 includes a partition wall 5 that extends from the partition wall 4 toward the outside in the radial direction R inside the second storage chamber 12. And the 2nd opening part 22 is formed in the opposite side to the valve body drive part 71a on both sides of the partition wall 5 in the partition 4. As shown in FIG. In the present example, the entire second hydraulic control device 82 is disposed on the opposite side of the second opening 22 across the partition wall 5 in the partition wall 4. The partition wall 5 is formed over the entire area in the horizontal direction orthogonal to the axial direction L inside the second storage chamber 12. Therefore, the lower part of the space in which the second hydraulic control device 82 is disposed in the second storage chamber 12 functions as the oil storage unit 50 that stores the oil discharged from the second hydraulic control device 82. The lowermost part of the upper surface of the partition wall 5 is located below the second cover member 32. Therefore, the lowest position of the oil surface of the oil reservoir 50 is determined according to the height of the lowermost part of the upper surface of the partition wall 5. Specifically, the lowest position of the oil surface of the oil reservoir 50 is approximately the same as the lowest part of the upper surface of the partition wall 5.

  In view of this point, in this embodiment, the partition wall 5 is formed so that the lowermost part of the upper surface of the partition wall 5 is located above the lowermost part of the valve body drive part 71a. As a result, as in the first embodiment, at least a part of the valve body drive unit 71a is basically positioned below the oil surface of the oil storage unit 50, and the valve body drive unit 71a is placed in the oil storage unit 50. It is possible to cool with oil. In the present embodiment, the first opening 21 is disposed below the second opening 22 as in the first embodiment.

3. Third Embodiment A third embodiment of the vehicle drive device according to the present invention will be described with reference to FIG. This embodiment is different from the first embodiment in that the entire second storage chamber 12 is disposed below the uppermost part of the rotating electrical machine MG. Below, it demonstrates centering around difference with said 1st embodiment, and it is the same as that of said 1st embodiment about the point which is not specified clearly.

  As shown in FIG. 7, in the present embodiment, the surface of the partition wall 4 on the second storage chamber 12 side is an inclined surface (that is, a vertical surface) inclined by 90 degrees with respect to the horizontal plane. That is, in the present embodiment, the second hydraulic control device 82 is fixed to a surface formed on the outer surface of the peripheral wall 6 and parallel to the vertical surface. The entire second storage chamber 12 is disposed below the uppermost portion of the rotating electrical machine MG, and the second hydraulic control device 82 (the entire second hydraulic control device 82 in this example) has a rotational axis. It is arranged so as to overlap with the rotating electrical machine MG when viewed in the horizontal direction orthogonal to X.

  In the present embodiment, the first opening 21 is at the same position in the axial direction L as the main body (core) of the stator St, and is the main body (specifically, the main body of the main body when viewed in the vertical direction V). , One end of a horizontal section passing through the rotation axis X). In other words, in the present embodiment, the oil guided to the first storage chamber 11 via the communication oil passage 20 is configured to be supplied to the main body portion of the stator St.

  In the present embodiment, the first opening 21 is disposed above the second opening 22. Therefore, in this embodiment, the lowest position of the oil level of the oil reservoir 50 is determined according to the height of the lowermost portion of the first opening 21. In the present embodiment, in the configuration in which at least one of the lowermost part of the first opening 21 and the lowermost part of the second opening 22 is disposed above the lowermost part of the valve body driving unit 71a, At least one of the lowermost portion of the first opening portion 21 and the lowermost portion of the second opening portion 22 (the lowermost portion of the first opening portion 21 in this example) is disposed above the uppermost portion of the valve body driving portion 71a. Is adopted. Thereby, the whole valve body drive part 71a is basically located below the oil level of the oil storage part 50, and the valve body drive part 71a can be efficiently cooled by the oil in the oil storage part 50. It is possible.

4). Other Embodiments Finally, other embodiments of the vehicle drive device according to the present invention will be described. Note that the configurations disclosed in the above-described embodiments and the following embodiments can be applied in combination with the configurations disclosed in other embodiments as long as no contradiction arises.

(1) In each of the above embodiments, the configuration in which the communication oil passage 20 is formed using the oil passage forming member 7 fixed to the inner peripheral surface of the peripheral wall 6 of the first case portion 3a has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the communication oil path 20 may be formed by only an oil path formed inside the peripheral wall 6 of the first case portion 3a.

(2) In said 1st and 3rd embodiment, at least one of the lowest part of the 1st opening part 21 and the lowest part of the 2nd opening part 22 is above the lowest part of the valve body drive part 71a. The arrangement to be arranged has been described as an example. However, the embodiment of the present invention is not limited to this. That is, when a cooling mechanism for cooling the valve body driving unit 71a is separately provided or when cooling is unnecessary, both the lowermost part of the first opening 21 and the lowermost part of the second opening 22 are connected to the valve body. It is also possible to adopt a configuration that is arranged below the lowermost part of the drive unit 71a.

(3) In said 2nd embodiment, the lowest part of the upper surface of the partition wall 5 demonstrated as an example the structure located above the lowest part of the valve body drive part 71a. However, the embodiment of the present invention is not limited to this. That is, when a cooling mechanism for cooling the valve body driving unit 71a is separately provided or when cooling is unnecessary, the lowermost part of the upper surface of the partition wall 5 is positioned below the lowermost part of the valve body driving part 71a. A configuration or a configuration in which the case 3 does not include the partition wall 5 is also possible. Further, as a configuration in which a through hole penetrating the partition wall 5 is formed in the partition wall 5, oil discharged from the second hydraulic control device 82 is supplied to the second opening 22 through the through hole. It can also be set as a structure. In this case, it is preferable that the lowermost portion of the through hole is positioned above the lowermost portion of the valve body driving unit 71a.

(4) In each of the above embodiments, the configuration in which only one first opening 21 is formed at the same position in the axial direction L has been described as an example. However, the embodiment of the present invention is not limited to this. In other words, the plurality of first openings 21 may be formed at different positions in the circumferential direction C at the same position in the axial direction L.

(5) In the above-described first and second embodiments, the configuration in which the first opening 21 is disposed above the coil end portion Ce has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the first opening 21 has the same axial position as the main body (core) of the stator St and is disposed above the main body (for example, the uppermost part of the main body). You can also. Such 1st opening part 21 can also be set as the structure provided in addition to the 1st opening part 21 in said 1st and 2nd embodiment.

(6) In each of the above embodiments, the second hydraulic control device 82 includes the second hydraulic control valve 72, and the hydraulic pressure controlled by the second hydraulic control valve 72 is supplied to the circulation hydraulic chamber of the first clutch C1. The configuration has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the second hydraulic control device 82 may not include the second hydraulic control valve 72, and the hydraulic pressure controlled by the second hydraulic control device 82 may be supplied only to the working hydraulic chamber of the first clutch C1. Further, the second hydraulic pressure control device 82 may be configured to control the hydraulic pressure supplied to the torque converter TC in addition to the first clutch C1.

(7) In each of the above-described embodiments, the first clutch C1 has been described as an example of a configuration including a working hydraulic pressure chamber and a circulation hydraulic pressure chamber that are arranged separately on both sides of the piston in the sliding direction of the piston. . However, the embodiment of the present invention is not limited to this. For example, the first clutch C1 includes a cancel hydraulic chamber for canceling the centrifugal hydraulic pressure acting on the piston in addition to the working hydraulic chamber and the circulation hydraulic chamber, and a second hydraulic control device 82 (for example, a second hydraulic pressure chamber). The hydraulic pressure after the control by the control valve 72) may be supplied to the cancel hydraulic chamber.

(8) In each of the above embodiments, the case where the first clutch C1 is configured as a wet multi-plate clutch mechanism has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the first clutch C1 may be configured as a dry single plate clutch mechanism.

(9) In the above embodiments, the configuration in which the oil discharged from the hydraulic pump 9 is supplied to the second hydraulic control device 82 via the first hydraulic control device 81 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, the second hydraulic control device 82 includes a line pressure control valve, and the oil discharged from the hydraulic pump 9 is directly supplied to the second hydraulic control device 82 without passing through the first hydraulic control device 81. It can also be.

(10) In each of the above embodiments, the configuration in which the hydraulic pressure controlled by the first hydraulic control valve 71 of the second hydraulic control device 82 is directly supplied to the working hydraulic chamber of the first clutch C1 has been described as an example. However, the embodiment of the present invention is not limited to this. For example, a hydraulic control valve (not shown) separate from the first hydraulic control valve 71 is provided, and the hydraulic pressure controlled (regulated) by the separate hydraulic control valve is supplied to the working hydraulic chamber of the first clutch C1. It can also be set as a structure. In this case, the another hydraulic control valve is a pressure regulating valve that regulates the line pressure by operating the hydraulic pressure controlled by the first hydraulic control valve 71 as a signal pressure. A configuration provided in the hydraulic control device 82 is preferable.

(11) In each of the above embodiments, the input shaft I, the first clutch C1, the rotating electrical machine MG, the torque converter TC, the intermediate shaft M, the speed change mechanism TM, and the output shaft O are all arranged on the rotational axis X. The above configuration has been described as an example. However, the embodiment of the present invention is not limited to this. That is, at least one of these may be arranged on an axis different from the rotational axis X, and the vehicle drive device 1 may be configured as a drive device having a multi-axis configuration. Such a configuration is suitable when mounted on a FF (Front Engine Front Drive) type vehicle.

(12) In each of the above embodiments, the configuration in which the vehicle drive device 1 includes the input shaft I that is drivingly connected to the internal combustion engine E, the torque converter TC, and the speed change mechanism TM has been described as an example. However, the embodiment of the present invention is not limited to this. That is, the vehicle drive device 1 may be configured not to include at least one of these.

(13) Regarding other configurations as well, the embodiments disclosed herein are illustrative in all respects, and embodiments of the present invention are not limited thereto. In other words, configurations that are not described in the claims of the present application can be modified as appropriate without departing from the object of the present invention.

  The present invention relates to a rotating electrical machine, an engaging device, a hydraulic control device that controls the hydraulic pressure supplied to the engaging device, a first storage chamber that houses the rotating electrical machine and the engaging device, and a second housing that houses the hydraulic control device. It can utilize for the drive device for vehicles provided with the case which has a storage chamber.

1: vehicle drive device 3: case 4: partition wall 4a: inclined surface 5: partition wall 11: first storage chamber 12: second storage chamber 12a: inner wall surface 20: communication oil passage 21: first opening 22: first Two openings 71: first hydraulic control valve (hydraulic control valve)
71a: Valve body drive unit 82: Second hydraulic control device (hydraulic control device)
C: Circumferential direction C1: First clutch (engagement device)
E: Internal combustion engine I: Input shaft (input member)
MG: rotating electrical machine O: output shaft (output member)
R: radial direction V: vertical direction X: rotation axis W: wheel

Claims (5)

A rotating electrical machine, an engaging device, a hydraulic control device that controls the hydraulic pressure supplied to the engaging device, a first storage chamber that houses the rotating electrical machine and the engaging device, and a second housing that houses the hydraulic control device A vehicle drive device comprising a case having a storage chamber,
A communication oil passage communicating the first storage chamber and the second storage chamber;
The second storage chamber is disposed so as to overlap the rotating electrical machine when viewed in a radial direction based on the rotational axis in a partial region in the circumferential direction based on the rotational axis of the rotating electrical machine. And
The first opening that opens into the first storage chamber of the communication oil passage is located above the rotating electrical machine and is disposed so as to overlap the rotating electrical machine when viewed in the vertical direction.
The vehicle drive device in which at least a part of the inner wall surface of the second storage chamber is disposed above the first opening. The hydraulic control device includes a valve body driving unit that drives a valve body of a hydraulic control valve,
At least one of the lowermost portion of the first opening and the lowermost portion of the second opening that opens into the second storage chamber of the communication oil passage is disposed above the lowermost portion of the valve body driving portion. The vehicle drive device according to claim 1. The second storage chamber is disposed at least partially below the uppermost part of the rotating electrical machine,
The case includes a partition that separates the first storage chamber and the second storage chamber,
The partition wall has an inclined surface inclined with respect to a horizontal plane on the second storage chamber side,
The second opening is formed in the inclined surface of the partition;
The vehicle drive device according to claim 2, wherein the first opening and a lowermost part of the valve body driving unit are disposed below the second opening. The hydraulic control device includes a valve body driving unit that drives a valve body of a hydraulic control valve,
The entire second storage chamber is disposed above the top of the rotating electrical machine,
The case includes a partition wall separating the first storage chamber and the second storage chamber, and a partition wall extending from the partition wall toward the outside in the radial direction inside the second storage chamber,
A second opening that opens into the second storage chamber of the communication oil passage is formed on the opposite side of the valve body drive unit across the partition wall of the partition;
The partition wall is formed such that the lowermost part of the upper surface of the partition wall is located above the lowermost part of the valve body drive unit,
The vehicle drive device according to claim 1, wherein the first opening is disposed below the second opening. The rotating electrical machine is provided in a power transmission path connecting an input member drivingly connected to the internal combustion engine and an output member drivingly connected to the wheels;
5. The vehicle drive device according to claim 1, wherein the engagement device is provided between the input member and the rotating electric machine in the power transmission path. 6.

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