WO2021106349A1 - Driving device for vehicle - Google Patents

Abstract

In the present invention, a case (20) comprises a partition wall (21) separating a first accommodation chamber (A1) and a second accommodation chamber (A2), and the partition wall (21) comprises a support part (22) extending in a radial direction (D). A first gear (10) comprises a tooth part (12) on which a gear tooth that meshes with a second gear (44) is formed, a shaft part (13), and a connection part (14) for connecting the tooth part (12) and the shaft part (13). With a section of the shaft part (13) on one side in the axial direction (L) with respect to the connection part (14) defined as a subject section (13a), the first gear (10) is supported by the support part (22) in a cantilevered state via a first bearing (81) disposed in the diameter direction (D) between the target section (13a) and the support part (22).

Description

Vehicle drive

The present invention is a vehicle drive device including an input member that is driven and connected to an internal combustion engine, an output member that is driven and connected to wheels, a first rotary electric machine, a second rotary electric machine, and a differential gear mechanism. Regarding.

An example of the vehicle drive device as described above is disclosed in Japanese Patent Application Laid-Open No. 2015-205624 (Patent Document 1). Hereinafter, the reference numerals shown in parentheses in the description of the background technology and the problems are those of Patent Document 1. The vehicle drive device (1) of Patent Document 1 includes an input shaft (10) that is driven and connected to the internal combustion engine (E), an output device (70) that is driven and connected to the wheels (W), and a first rotary electric machine. It includes (30), a second rotary electric machine (40), and a differential gear device (20) that functions as a power distribution device. In this vehicle drive device (1), the first rotary electric machine (30) is arranged coaxially with the differential gear device (20), and the second rotary electric machine (40) is different from the differential gear device (20). It is located on a separate axis. Then, the second rotary electric machine (40) uses the differential gear device (20) via a gear mechanism (90) arranged on a shaft different from that of the first rotary electric machine (30) and the second rotary electric machine (40). And is driven and connected to the output device (70).

Japanese Unexamined Patent Publication No. 2015-205624

As described above, in the vehicle drive device (1) of Patent Document 1, the first rotary electric machine (30) is arranged coaxially with the differential gear device (20). Therefore, the position where the second rotary electric machine (40) can be arranged is limited to a part of the region near the gear mechanism (90). Specifically, the output gear (45) of the second rotary electric machine (40) meshes with the first gear (91) of the gear mechanism (90), and the second stator (41) of the second rotary electric machine (40). The arrangement position of the second rotary electric machine (40) is limited to a position where the first rotary electric machine (30) does not interfere with the first stator (31) and the output shaft (80). As a result, restrictions on the outer shape of the vehicle drive device (1) may increase. Therefore, it is conceivable to arrange the first rotary electric machine (30) on a shaft different from that of the differential gear device (20) to relax the limitation on the arrangement position of the second rotary electric machine (40). However, in this case, it is necessary to provide a mechanism (for example, a gear mechanism) for driving and connecting the first rotary electric machine (30) and the differential gear device (20) arranged on different shafts, and the vehicle drive device. (1) may increase in size in the axial direction (L).

Therefore, it is desired to realize a technology capable of suppressing the increase in size of the vehicle drive device in the axial direction when the first rotary electric machine is arranged on a shaft different from the differential gear mechanism.

The vehicle drive device according to the present disclosure includes an input member that is driven and connected to the internal combustion engine, an output member that is driven and connected to the wheels, a first rotary electric machine, a second rotary electric machine, and a differential gear mechanism. The differential gear mechanism is driven by a first rotating element that is driven and connected to the first rotating electric machine, a second rotating element that is driven and connected to the input member, the second rotating electric machine, and the output member. A first gear having a third rotating element to be connected and rotating integrally with the first rotating element, and a second gear rotating integrally with the first rotor of the first rotating electric machine are connected to each other. The first rotary electric machine, the second rotary electric machine, the differential gear mechanism, the first gear, and the second gear are housed in a case, and the case includes the first rotary electric machine and the first rotary electric machine and the second gear. A partition wall for separating a first accommodation chamber in which the second rotary electric machine is housed and a second storage room in which the differential gear mechanism is housed is provided, and the partition wall serves as a rotation axis of the first gear. A support portion extending in the radial direction as a reference is provided, and the first gear connects a tooth portion having gear teeth meshing with the second gear, a shaft portion, and the tooth portion and the shaft portion. The first gear is located between the target portion and the support portion in the radial direction, with a portion of the shaft portion on one side in the axial direction as a target portion. It is supported in a cantilevered state by the support portion via a first bearing arranged in.

In this configuration, the first rotating electric machine and the first rotating element can be driven and connected via the meshing portion between the first gear and the second gear, so that the first rotating electric machine has a different shaft from the differential gear mechanism. Even when the first rotating electric machine is arranged in the above, the drive connection between the first rotating electric machine and the first rotating element can be appropriately performed. By arranging the first rotating electric machine on a shaft different from the differential gear mechanism, the degree of freedom in arranging the first rotating electric machine is increased, which alleviates the restriction on the arrangement position of the second rotating electric machine, and the second The degree of freedom in arranging the rotating electric machine is also increased. Therefore, restrictions on the outer shape of the vehicle drive device can be relaxed, and it becomes easy to realize a vehicle drive device having excellent mountability on a vehicle.

In this configuration, the first gear for driving and connecting the first rotary electric machine arranged on another shaft and the differential gear mechanism is supported by the support portion via the first bearing in a cantilevered state. .. Therefore, as compared with the case where the first gear is supported by the case via bearings on both sides in the axial direction, the axial space required for arranging the support portion is suppressed to be small, and the support portion is provided. It is possible to suppress the increase in size of the vehicle drive device in the axial direction. Further, in this configuration, since the support portion for supporting the first gear can be formed by using the partition wall that separates the first accommodation chamber and the second accommodation chamber, the support portion is provided for the vehicle. It is easy to suppress the increase in size of the drive device in the axial direction. As a result, in this configuration, when the first rotary electric machine is arranged on a shaft different from the differential gear mechanism, it is possible to suppress the increase in size of the vehicle drive device in the axial direction.

Further features and advantages of the vehicle drive device will be clarified from the following description of the embodiments described with reference to the drawings.

Skeleton diagram of the vehicle drive device according to the embodiment The figure which shows the arrangement relation in the axial direction of each component of the vehicle drive device which concerns on embodiment. Cross-sectional view of a part of the vehicle drive device according to the embodiment

The embodiment of the vehicle drive device will be described with reference to the drawings. The vehicle drive device 1 of the present embodiment is a hybrid including both an internal combustion engine EG and a rotary electric machine (here, two rotary electric machines of the first rotary electric machine 4 and the second rotary electric machine 5) as a drive force source for the wheels W. It is a drive device for vehicles. The vehicle drive device 1 is configured as a drive device for a so-called two-motor split type hybrid vehicle. Further, the vehicle drive device 1 according to the present embodiment is configured as a drive device for an FF (Front Engine Front Drive) vehicle.

As shown in FIG. 1, the vehicle drive device 1 includes an input member 2, an output member 9, a first rotary electric machine 4, a second rotary electric machine 5, and a distribution differential gear mechanism 3. There is. The first rotary electric machine 4, the second rotary electric machine 5, the distribution differential gear mechanism 3, the first gear 10 described later, and the first output gear 44 described later are housed in the case 20. The input member 2 (here, a part of the input member 2) and the output member 9 are also housed in the case 20. In the present embodiment, the vehicle drive device 1 further includes a counter gear mechanism 6 and an output differential gear mechanism 7. The counter gear mechanism 6 and the output differential gear mechanism 7 are also housed in the case 20. In the present embodiment, the distribution differential gear mechanism 3 corresponds to the "differential gear mechanism", and the first output gear 44 corresponds to the "second gear".

The input member 2 and the distribution differential gear mechanism 3 are arranged on the first axis X1 common to them. The first gear 10 and the outer peripheral gear 39 described later are also arranged on the first shaft X1. The first rotary electric machine 4 is arranged on the second axis X2, which is different from the first axis X1. The first output gear 44 is also arranged on the second axis X2. The second rotary electric machine 5 is arranged on a third axis X3, which is different from the first axis X1 and the second axis X2. The second output gear 54, which will be described later, is also arranged on the third axis X3. The counter gear mechanism 6 is arranged on a fourth axis X4, which is different from the first axis X1, the second axis X2, and the third axis X3. The output differential gear mechanism 7 is arranged on the fifth axis X5, which is different from the first axis X1, the second axis X2, the third axis X3, and the fourth axis X4. The first axis X1, the second axis X2, the third axis X3, the fourth axis X4, and the fifth axis X5 are arranged in parallel with each other. In the present embodiment, the direction parallel to each of these axes X1 to X5 is referred to as "axial direction L". Each of these axes X1 to X5 is a virtual axis. In the present embodiment, the first axis X1 corresponds to the "rotation axis of the first gear", the outer peripheral gear 39 corresponds to the "third gear", and the second output gear 54 corresponds to the "fourth gear". ..

As shown in FIG. 3, inside the case 20, a first storage chamber A1 in which the first rotary electric machine 4 and the second rotary electric machine 5 are housed and a second storage chamber A1 in which the distribution differential gear mechanism 3 is housed are housed. A chamber A2 is formed. In the present embodiment, the first gear 10 (specifically, the tooth portion 12 included in the first gear 10) and the first output gear 44 are housed in the first storage chamber A1. Further, in the present embodiment, the input member 2 (here, a part of the input member 2), the counter gear mechanism 6, and the output differential gear mechanism 7 are housed in the second storage chamber A2. Further, in the present embodiment, the outer peripheral gear 39 and the second output gear 54 are housed in the second storage chamber A2.

The case 20 includes a first wall portion 21A, a second wall portion 21B, and a partition wall 21C. The partition wall 21C is arranged between the first wall portion 21A and the second wall portion 21B in the axial direction L. Then, the first accommodation chamber A1 is formed between the first wall portion 21A and the partition wall 21C in the axial direction L, and the second accommodation chamber A2 is formed between the second wall portion 21B and the partition wall 21C in the axial direction L. Is formed. As described above, the case 20 includes a partition wall 21C that separates the first storage chamber A1 and the second storage chamber A2. Further, the case 20 includes a second wall portion 21B arranged on the side opposite to the partition wall 21C side in the axial direction L with respect to the second storage chamber A2. Here, the side on which the first accommodation chamber A1 is arranged with respect to the partition wall 21C in the axial direction L is the axial first side L1, and the side opposite to the axial first side L1 in the axial direction L is the axial first side. It is L2 on the 2nd side. As shown in FIG. 1, the vehicle drive device 1 is arranged on the first side L1 in the axial direction with respect to the internal combustion engine EG. In the present embodiment, the second wall portion 21B corresponds to the “wall portion”.

The input member 2 is driven and connected to the internal combustion engine EG. The internal combustion engine EG is a prime mover (gasoline engine, diesel engine, etc.) that is driven by combustion of fuel inside the engine to extract power. In the present embodiment, the input member 2 is drive-connected to the output shaft of the internal combustion engine EG (internal combustion engine output shaft such as a crankshaft). The input member 2 may be driven and connected to the internal combustion engine EG via a damper, a clutch, or the like.

Note that "driving connection" means a state in which two rotating elements are connected so as to be able to transmit a driving force (synonymous with torque). This concept includes a state in which two rotating elements are connected so as to rotate integrally, and a state in which two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members. .. Such transmission members include various members (shafts, gear mechanisms, belts, etc.) that transmit rotation at the same speed or at different speeds, and are engaging devices (friction) that selectively transmit rotation and driving force. Engagement devices, meshing engagement devices, etc.) may be included. However, when the term "drive connection" is used for each rotating element of the differential gear mechanism, it means that the three or more rotating elements included in the differential gear mechanism are driven and connected to each other without interposing other rotating elements. It shall point.

The distribution differential gear mechanism 3 includes a first rotating element 31 that is driven and connected to the first rotating electric machine 4, a second rotating element 32 that is driven and connected to the input member 2, a second rotating electric machine 5, and an output member 9. A third rotating element 33, which is driven and connected to the above, is provided. In the present embodiment, the distribution differential gear mechanism 3 includes a sun gear S which is a first rotating element 31, a carrier C which is a second rotating element 32, and a ring gear R which is a third rotating element 33. It is a planetary gear mechanism. The distribution differential gear mechanism 3 of the present embodiment is a single pinion type planetary gear mechanism, and the three rotating elements 31 to 33 are the first rotating element 31 (sun gear S) and the second rotating element in the order of rotation speed. 32 (carrier C) and the third rotating element 33 (ring gear R). Therefore, the distribution differential gear mechanism 3 has a power distribution function of distributing the torque of the input member 2 to the first rotary electric machine 4, the second rotary electric machine 5, and the output member 9.

The "order of rotation speed" is the order of rotation speed of each rotation element 31 to 33 in the rotation state. The rotation speed of each of the rotating elements 31 to 33 changes depending on the rotational state of the distribution differential gear mechanism 3, but the order of the high and low rotation speeds of the rotating elements 31 to 33 is the order of the distribution differential gear mechanism 3. Since it is determined by the structure, it is constant. The order of the rotational speeds of the rotating elements 31 to 33 is the same as the arrangement order of the rotating elements 31 to 33 in the speed diagram (also referred to as a collinear diagram) well known to those skilled in the art.

The vehicle drive device 1 includes a first gear 10 that rotates integrally with the first rotating element 31 (sun gear S). In the present embodiment, the first gear 10 is a separate member from the first rotating element 31 (sun gear S), and the first rotating element 31 is rotated integrally with the first rotating element 31 (sun gear S). It is connected to (Sun Gear S) (here, spline connection). The first gear 10 is arranged on the first side L1 in the axial direction with respect to the first rotating element 31 (sun gear S). The first rotating element 31 (sun gear S) is drive-connected to the first rotating electric machine 4 via the first gear 10.

The second rotating element 32 (carrier C) rotatably supports a plurality of pinion gears P that mesh with both the first rotating element 31 (sun gear S) and the third rotating element 33 (ring gear R). The second rotating element 32 (carrier C) is connected to the input member 2 (here, joined by welding) so as to rotate integrally with the input member 2.

The vehicle drive device 1 includes an outer peripheral gear 39 that rotates integrally with the third rotating element 33 (ring gear R). Specifically, the third rotating element 33 (ring gear R) is formed on the inner peripheral surface of the gear forming member 38 formed in a cylindrical shape. An outer peripheral gear 39 is formed on the outer peripheral surface of the gear forming member 38. In the present embodiment, the third rotating element 33 (ring gear R) and the outer peripheral gear 39 are arranged so as to overlap each other in the radial direction along the radial direction D. The radial direction D is the radial direction with respect to the first axis X1. Here, regarding the arrangement of the two members, "overlapping in a certain direction" means that the virtual straight line is 2 when the virtual straight line parallel to the line-of-sight direction is moved in each direction orthogonal to the virtual straight line. It means that there is at least a part of the region that intersects both of the two members. The third rotating element 33 (ring gear R) is drive-connected to the second rotating electric machine 5 and the output member 9 via the outer peripheral gear 39. In the present embodiment, the third rotating element 33 (ring gear R) is drive-connected to the output member 9 via the outer peripheral gear 39 and the counter gear mechanism 6. In this embodiment, the gear forming member 38 corresponds to the "rotating member".

The first rotary electric machine 4 is rotatably supported by a first stator 41 fixed to the case 20 and a radial inside of the first stator 41 (a radial inside with respect to the second axis X2). It includes one rotor 42. The vehicle drive device 1 includes a first output gear 44 that rotates integrally with the first rotor 42 of the first rotary electric machine 4. Specifically, the first rotor 42 is connected to the first rotor shaft 43 so as to rotate integrally with the first rotor shaft 43. That is, the first rotor shaft 43 rotates integrally with the first rotor 42. A first output gear 44 is provided so as to rotate integrally with the first rotor shaft 43. In the present embodiment, the first output gear 44 is a separate member from the first rotor shaft 43, and is connected to the first rotor shaft 43 so as to rotate integrally with the first rotor shaft 43 (here, a spline). (Concatenated). Specifically, the spline teeth formed on the inner peripheral surface of the first output gear 44 and the spline teeth formed on the outer peripheral surface of the first rotor shaft 43 are spline-engaged. The first output gear 44 is arranged on the second side L2 in the axial direction with respect to the first rotor 42. The first output gear 44 meshes with the first gear 10. By engaging the first gear 10 and the first output gear 44 with each other in this way, the first rotary electric machine 4 (specifically, the first rotor 42) has the first gear 10 and the first output gear 44. It is driven and connected to the first rotating element 31 (sun gear S) of the distribution differential gear mechanism 3 via the meshing portion. In this embodiment, the first rotor shaft 43 corresponds to the "rotor shaft".

As shown in FIG. 3, the vehicle drive device 1 includes a pair of second bearings 82 that support the first rotor shaft 43. Here, each of the pair of second bearings 82 is a ball bearing. The first rotor shaft 43 is supported by the first wall portion 21A via one of a pair of second bearings 82 (specifically, the one arranged on the first side L1 in the axial direction), and a pair. It is supported by the partition wall 21C via the other side of the second bearing 82 (specifically, the one arranged on the second side L2 in the axial direction). The first rotor 42 is arranged between the pair of second bearings 82 in the axial direction L.

In this embodiment, the first output gear 44 is arranged between the pair of second bearings 82 in the axial direction L. Specifically, the first output gear 44 is arranged between the pair of second bearings 82 in the axial direction L and on the second side L2 in the axial direction with respect to the first rotor 42. That is, the first rotor 42 is arranged on the first side L1 in the axial direction with respect to the first output gear 44. Further, the vehicle drive device 1 includes a rotation sensor 45 that detects the rotation of the first rotor 42, and the rotation sensor 45 is arranged between the pair of second bearings 82 in the axial direction L. Specifically, the rotation sensor 45 is arranged between the pair of second bearings 82 in the axial direction L and on the first side L1 in the axial direction with respect to the first rotor 42. By arranging the rotation sensor 45 in this way, the first rotary electric machine, which is a component having a relatively large diameter, as compared with the case where the rotation sensor 45 is arranged on the second side L2 in the axial direction with respect to the first rotor 42. 4 can be arranged close to the partition wall 21C in the axial direction L. As a result, the dimension of the vehicle drive device 1 in the radial direction D at the end of the first side L1 in the axial direction can be suppressed to a small size, and the vehicle mountability of the vehicle drive device 1 can be improved. In the present embodiment, the rotation sensor 45 is a resolver, and the rotation sensor 45 includes a sensor stator fixed to the case 20 (here, the first wall portion 21A) and a sensor rotor fixed to the first rotor shaft 43. , Is equipped.

The first rotary electric machine 4 can function as a motor (motor) that receives power supply and generates power, and as a generator (generator) that receives power supply and generates power. Is. The first rotary electric machine 4 is electrically connected to a power storage device (battery, capacitor, etc .; not shown). The first rotary electric machine 4 functions as a generator that generates electric power mainly by the torque of the input member 2 (internal combustion engine EG) input via the distribution differential gear mechanism 3. The first rotary electric machine 4 may function as a motor when the vehicle is traveling at high speed or when the internal combustion engine EG is started.

The second rotary electric machine 5 is rotatably supported by a second stator 51 fixed to the case 20 and radially inside the second stator 51 (diameterally inside with respect to the third axis X3). It is equipped with two rotors 52. The vehicle drive device 1 includes a second output gear 54 that rotates integrally with the second rotor 52 of the second rotary electric machine 5. Specifically, the second rotor 52 is connected to the second rotor shaft 53 so as to rotate integrally with the second rotor shaft 53. That is, the second rotor shaft 53 rotates integrally with the second rotor 52. A second output gear 54 is provided so as to rotate integrally with the second rotor shaft 53. The second output gear 54 is arranged on the second side L2 in the axial direction with respect to the second rotor 52. In this embodiment, the second output gear 54 meshes with the outer peripheral gear 39. By engaging the outer peripheral gear 39 and the second output gear 54 with each other in this way, the second rotary electric machine 5 (specifically, the second rotor 52) has a meshing portion between the outer peripheral gear 39 and the second output gear 54. Is driven and connected to the third rotating element 33 (ring gear R) and the output member 9 of the distribution differential gear mechanism 3.

The second rotary electric machine 5 can also function as a motor and a generator, and is electrically connected to a power storage device (not shown). The second rotary electric machine 5 mainly functions as a motor (assist motor) that assists a driving force for traveling the vehicle. When the vehicle is decelerating or the like, the second rotary electric machine 5 may function as a generator.

In the present embodiment, the first rotary electric machine 4 and the second rotary electric machine 5 are arranged on different axes, and further, each of the first rotary electric machine 4 and the second rotary electric machine 5 has an input member 2 and a difference for distribution. It is arranged on a shaft separate from the moving gear mechanism 3. Therefore, the degree of freedom in arrangement of the first rotary electric machine 4 and the second rotary electric machine 5 is high.

The first rotary electric machine 4 and the second rotary electric machine 5 are arranged on the first side L1 in the axial direction with respect to the distribution differential gear mechanism 3. Then, in the present embodiment, the arrangement area of the first stator 41 in the axial direction L overlaps with the arrangement area of the second stator 51 in the axial direction L. Therefore, the first stator 41 of the first rotary electric machine 4 and the second stator 51 of the second rotary electric machine 5 do not overlap in the axial direction along the axial direction L (see FIG. 2). Regarding the arrangement of the two members, "the axial arrangement areas overlap" means that at least a part of the axial arrangement area of the other member is included in the axial arrangement area of one member. Means that.

The counter gear mechanism 6 is provided in the power transmission path between the distribution differential gear mechanism 3 (specifically, the third rotating element 33) and the output differential gear mechanism 7. The counter gear mechanism 6 includes a first counter gear 61, a second counter gear 62 provided at a position different from that of the first counter gear 61 in the axial direction L, and a first counter gear 61 and a second counter gear 62. It is provided with a counter shaft 63 for connecting the above. In the present embodiment, the second counter gear 62 is arranged on the first side L1 in the axial direction with respect to the first counter gear 61. Further, the second counter gear 62 is formed to have a smaller diameter than the first counter gear 61. The first counter gear 61 meshes with the outer peripheral gear 39 that rotates integrally with the third rotating element 33 (ring gear R). The second counter gear 62 meshes with the differential input gear 71 of the output differential gear mechanism 7. The counter gear mechanism 6 decelerates the output rotation from the distribution differential gear mechanism 3 (at the same time amplifies the output torque from the distribution differential gear mechanism 3) and transmits the deceleration to the output differential gear mechanism 7. Functions as a mechanism.

The output differential gear mechanism 7 includes a differential input gear 71, and distributes the rotation input to the differential input gear 71 to a pair of output shafts 8. The pair of output shafts 8 are drive-connected to the wheels W, respectively. The output differential gear mechanism 7 transmits the rotation and torque input to the differential input gear 71 from the distribution differential gear mechanism 3 side via the counter gear mechanism 6 to the left and right two output shafts 8 (that is, the left and right 2). It is distributed and transmitted to one wheel W). In this embodiment, the output member 9 is a differential input gear 71. The output member 9 is driven and connected to the wheel W. In the present embodiment, the output member 9 is attached to the wheel W via the differential gear mechanism (for example, bevel gear type or planetary gear type differential gear mechanism) included in the output differential gear mechanism 7 and the output shaft 8. Drive-connected.

Here, as shown in FIG. 2, the vertical plane including the first axis X1 which is the rotation axis of the input member 2 is defined as the first virtual plane P1, and the horizontal plane including the first axis X1 is the second virtual plane P2. And. Further, the virtual plane including the first axis X1 and the fifth axis X5 which is the rotation axis of the output differential gear mechanism 7 is defined as the third virtual plane P3, and the first axis X1 and the counter gear mechanism are defined as the third virtual plane P3. The virtual plane including the fourth axis X4, which is the axis of rotation of 6, is referred to as the fourth virtual plane P4. In the present embodiment, the arrangement of each axis X1 to X5 and each component in the axial direction in relation to these virtual planes P1 to P4 is as follows.

The second axis X2, the fourth axis X4, and the fifth axis X5 are arranged on the same side with respect to the first virtual plane P1. The third axis X3, the second axis X2, the fourth axis X4, and the fifth axis X5 are separately arranged on both sides of the first virtual plane P1. Further, the first rotary electric machine 4 having the second axis X2 as the rotation axis is arranged so that the arrangement area includes the first virtual plane P1. The second rotary electric machine 5 having the third axis X3 as the rotation axis is the horizontal first side H1 (in this example, the vehicle front-rear direction) in which the entire body is one side of the horizontal direction H with respect to the first virtual plane P1. It is arranged so as to be located on the front side). The counter gear mechanism 6 having the fourth axis X4 as the rotation axis and the output differential gear mechanism 7 having the fifth axis X5 as the rotation axis are all in the horizontal direction H with respect to the first virtual plane P1. It is arranged so as to be located on the second side H2 in the horizontal direction (rear side in the front-rear direction of the vehicle in this example).

The second axis X2 and the fifth axis X5 are arranged on the same side (lower side of the vertical direction V in this example) with respect to the second virtual plane P2, and on the opposite side (upper side of the vertical direction V in this example). The third axis X3 and the fourth axis X4 are arranged on the side). Further, the first rotary electric machine 4 having the second axis X2 as the rotation axis is arranged so that the entire first rotary electric machine 4 is located on the lower side in the vertical direction V with respect to the second virtual plane P2. The output differential gear mechanism 7 having the fifth axis X5 as the rotation axis is arranged so that its arrangement area (more specifically, the arrangement area on the upper side) includes the second virtual plane P2. The second rotary electric machine 5 having the third axis X3 as the rotation axis and the counter gear mechanism 6 having the fourth axis X4 as the rotation axis have their arrangement areas (more specifically, the arrangement areas on the lower side respectively). It is arranged so as to include the second virtual plane P2.

The second axis X2 and the third axis X3 are arranged on the same side with respect to the third virtual plane P3. The second axis X2, the third axis X3, and the fourth axis X4 are separately arranged on both sides of the third virtual plane P3. Further, the second rotary electric machine 5 having the third axis X3 as the rotation axis is arranged so that the arrangement area includes the third virtual plane P3. The first rotary electric machine 4 having the second axis X2 as the rotation axis is arranged so that the entire first rotary electric machine 4 is located on the lower side with respect to the third virtual plane P3. The counter gear mechanism 6 having the fourth axis X4 as the rotation axis is arranged so that the entire counter gear mechanism 6 is located on the upper side with respect to the third virtual plane P3.

The second axis X2 and the fifth axis X5 are arranged on the same side with respect to the fourth virtual plane P4. The second axis X2, the fifth axis X5, and the third axis X3 are separately arranged on both sides of the fourth virtual plane P4. Further, the first rotary electric machine 4 having the second axis X2 as the rotation axis and the output differential gear mechanism 7 having the fifth axis X5 as the rotation axis are entirely on the lower side with respect to the fourth virtual plane P4. It is arranged so that it is located in. The second rotary electric machine 5 having the third axis X3 as the rotation axis is arranged so that its arrangement area (more specifically, the arrangement area on the lower side) includes the fourth virtual plane P4.

In particular, in the present embodiment, by arranging the first rotary electric machine 4 on a shaft separate from the distribution differential gear mechanism 3, the distribution differential gear mechanism 3 can be used while suppressing the overall increase in size of the vehicle drive device 1. On the other hand, the second rotary electric machine 5 can be arranged on the side opposite to the output differential gear mechanism 7. As a result, unlike the conventional drive device, the space above the output differential gear mechanism 7 in the vertical direction V and on the second side H2 in the horizontal direction with respect to the counter gear mechanism 6 is the first. The two-turn electric machine 5 is not arranged. Therefore, even if the vehicle on which the vehicle drive device 1 is mounted has an installation object OB (see FIG. 2) such as a steering shaft or a brake servo, interference with the installation object OB is avoided. be able to. That is, it is possible to realize a vehicle drive device 1 having excellent vehicle mountability.

In the present embodiment, the first rotary electric machine 4 arranged on a separate shaft and the distribution differential gear mechanism 3 are drive-connected via a meshing portion between the first gear 10 and the first output gear 44. Hereinafter, the support configuration of the first gear 10 in the vehicle drive device 1 of the present embodiment will be described with reference to FIG.

The first gear 10 includes a tooth portion 12, a shaft portion 13, and a connecting portion 14 that connects the tooth portion 12 and the shaft portion 13. Here, the connecting portion 14 integrally connects the tooth portion 12 and the shaft portion 13. In the present embodiment, the tooth portion 12, the shaft portion 13, and the connecting portion 14 are integrally formed by one member. By joining the tooth portion 12 and the shaft portion 13 at the connecting portion 14 by welding or the like, the tooth portion 12 and the shaft portion 13 can be integrally connected.

The tooth portion 12 is formed with gear teeth 11 that mesh with the first output gear 44. The first gear 10 is a gear of external teeth, and the gear teeth 11 are formed at the end of the radial outer side D2 in the tooth portion 12. Here, the radial outer side D2 means the outer side in the radial direction D. The tooth portion 12 is formed in a plate shape (here, an annular plate shape) extending in a direction intersecting the axial direction L (here, a direction orthogonal to the axial direction L). The shaft portion 13 extends along the axial direction L. Here, the shaft portion 13 is formed in a tubular shape (specifically, a cylindrical shape) extending in the axial direction L. Further, here, the outer diameter of the shaft portion 13 is uniformly formed along the axial direction L. The connecting portion 14 connects the portion of the radial inner D1 (here, the end portion of the radial inner D1) of the tooth portion 12 with the shaft portion 13. Here, the radial inner D1 means the inner side of the radial D. In the present embodiment, an engaging portion (specifically, an engaging portion (specifically, a sun gear S) for connecting the first gear 10 to the first rotating element 31 (sun gear S) on the inner peripheral surface of the portion of the shaft portion 13 on the second side L2 in the axial direction. , Spline teeth) are formed.

The case 20 includes a support portion 22 extending in the radial direction D. The first gear 10 is cantilevered by the support portion 22 via a first bearing 81 arranged between the target portion 13a and the support portion 22 in the radial direction D. Here, the target portion 13a is a portion on one side of the axial direction L with respect to the connecting portion 14 in the shaft portion 13. The first bearing 81 is arranged between the outer peripheral surface of the target portion 13a and the inner peripheral surface of the support portion 22 in the radial direction D. The first bearing 81 is arranged so as to be in contact with both the outer peripheral surface of the target portion 13a and the inner peripheral surface of the support portion 22. In addition, regarding the arrangement of the bearings, "contacting" means that the bearings are in contact with each other in a state where the clearance at the arrangement portion of the bearings is closed. Here, the first bearing 81 is arranged so as to be fitted to one of the outer peripheral surface of the target portion 13a and the inner peripheral surface of the support portion 22 by tightening and fitting, and to the other by gap fitting. The first gear 10 is not supported by the case 20 on the other side in the axial direction L with respect to the connecting portion 14 (the side opposite to the side on which the target portion 13a is arranged). In the present embodiment, the connecting portion 14 connects the end portion of the shaft portion 13 in the axial direction L and the tooth portion 12, and the entire shaft portion 13 is the target portion 13a.

As shown in FIG. 3, the support portion 22 is formed on the partition wall 21C. That is, the partition wall 21C includes the support portion 22. Therefore, the first gear 10 is supported by the partition wall 21C, which is one wall, in a cantilevered state. The support portion 22 is formed at a portion of the partition wall 21C on the inner side D1 in the radial direction. Specifically, a through hole is formed in the central portion of the partition wall 21C in the radial direction D (the end portion of the radial inner D1) so as to penetrate the partition wall 21C in the axial direction L. It is formed in a portion of the partition wall 21C where the through hole is formed (a portion surrounding the through hole). The inner peripheral surface of the through hole constitutes the tubular inner peripheral surface 26 described later.

In the present embodiment, the tooth portion 12 of the first gear 10 is arranged on the first side L1 in the axial direction with respect to the partition wall 21C. Therefore, in the present embodiment, the target portion 13a is a portion of the shaft portion 13 on the second side L2 in the axial direction with respect to the connecting portion 14. Since the tooth portion 12 of the first gear 10 is arranged on the first side L1 in the axial direction with respect to the partition wall 21C, in the present embodiment, the first output gear 44 is also L1 on the first side in the axial direction with respect to the partition wall 21C. Is located in.

The support portion 22 includes a tubular inner peripheral surface 26 arranged outside in the radial direction D with respect to the target portion 13a. The tubular inner peripheral surface 26 is formed in a cylindrical shape. The first bearing 81 that supports the first gear 10 (specifically, the shaft portion 13) has a radial direction between the target portion 13a (specifically, the outer peripheral surface of the target portion 13a) and the tubular inner peripheral surface 26. It is arranged between D. The first bearing 81 is arranged so as to be in contact with both the outer peripheral surface of the target portion 13a and the tubular inner peripheral surface 26. Here, the first bearing 81 is arranged so as to be fitted to one of the outer peripheral surface and the tubular inner peripheral surface 26 of the target portion 13a by tightening and fitting, and to the other by gap fitting. The tubular inner peripheral surface 26 is formed on the inner peripheral portion of the tubular portion 24 included in the support portion 22. The support portion 22 includes a radial extending portion 23 extending in the radial direction D, and the tubular portion 24 is connected to an end portion of the radial inner D1 in the radial extending portion 23. Here, the tubular portion 24 is integrally formed with the radial extending portion 23.

The first bearing 81 includes a bearing unit 90. Here, the bearing unit 90 is a structural unit of the first bearing 81, and the first bearing 81 includes one or more bearing units 90. In the present embodiment, since the first bearing 81 is a rolling bearing, the bearing unit 90 includes a raceway ring (inner ring and outer ring), a rolling element, and a cage. In this embodiment, the first bearing 81 includes a pair of bearing units 90. Here, the one of the pair of bearing units 90 arranged on the first side L1 in the axial direction is referred to as the first bearing unit 91, and the one arranged on the second side L2 of the pair of bearing units 90 in the axial direction is designated as the first bearing unit 91. The second bearing unit 92. Here, each of the pair of bearing units 90 is a ball bearing (specifically, a single row of ball bearings). In the present embodiment, the pair of bearing units 90 are bearing units 90 having the same diameter as each other. Therefore, by using, for example, the same type of bearing unit 90 as the pair of bearing units 90, the number of types of parts can be reduced and the cost can be reduced.

In the present embodiment, a radial projecting portion 27 projecting inward in the radial direction D with respect to both side portions in the axial direction L is formed in the intermediate portion of the tubular inner peripheral surface 26 in the axial direction L. The radial projecting portion 27 is formed over, for example, the entire circumferential direction (circumferential direction with respect to the first axis X1). In the present embodiment, the portion L1 on the first side in the axial direction with respect to the radial protrusion 27 on the tubular inner peripheral surface 26 and the second side in the axial direction with respect to the radial protrusion 27 on the tubular inner peripheral surface 26. The portion of L2 is formed to have the same diameter. The pair of bearing units 90 are arranged so as to be in contact with the radial protrusion 27 from opposite sides in the axial direction L between the target portion 13a and the tubular inner peripheral surface 26 in the radial direction D. There is. Specifically, the first bearing unit 91 is arranged so as to be in contact with the radial protrusion 27 from the axial first side L1, and the second bearing unit 92 is axial with respect to the radial protrusion 27. It is arranged so as to be in contact with the second side L2. Further, the pair of bearing units 90 are arranged so as to be in contact with both the outer peripheral surface of the target portion 13a and the tubular inner peripheral surface 26. Here, the pair of bearing units 90 are arranged so as to be fitted to one of the outer peripheral surface and the tubular inner peripheral surface 26 of the target portion 13a by tight fitting and to the other by gap fitting. In addition, regarding the arrangement of the bearing unit 90, "contacting" means that the bearing unit 90 is in contact with the arrangement portion in a state where the gap (clearance) is narrowed.

Since the first bearing 81 includes the pair of bearing units 90 as described above, the first gear 10 can be supported by the support span corresponding to the arrangement interval of the pair of bearing units 90 in the axial direction L. It is easy to improve the support accuracy of the gear 10. Further, as described above, since the pair of bearing units 90 are arranged so as to be in contact with the radial protrusion 27 from opposite sides in the axial direction L, the axial direction L acting on the first gear 10 The load can be transmitted to the support portion 22 via the first bearing 81 and supported by the support portion 22 regardless of the direction L of the load in the axial direction. Therefore, it is easy to regulate the movement of the first gear 10 in the axial direction L.

Specifically, the first bearing unit 91 is arranged so as to regulate the relative movement of the first bearing unit 91 to the first side L1 in the axial direction with respect to the first gear 10, and the second bearing unit 92 is arranged in the axial direction with respect to the first gear 10. It is arranged so that the relative movement to the second side L2 is regulated. As a result, the load acting on the first gear 10 toward the second side L2 in the axial direction is transmitted to the support portion 22 via the first bearing unit 91, supported by the support portion 22, and acts on the first gear 10. The load facing the first side L1 in the axial direction can be transmitted to the support portion 22 via the second bearing unit 92 and supported by the support portion 22. In the example shown in FIG. 3, the first bearing unit 91 is arranged so as to be in contact with the portion of the tooth portion 12 on the inner side D1 in the radial direction from the second side L2 in the axial direction. The relative movement of the first gear 10 to the first side L1 in the axial direction is regulated. Further, in the example shown in FIG. 3, the second bearing unit 92 is attached to a locking member (here, a snap ring) locked to the outer peripheral surface of the shaft portion 13 (specifically, the target portion 13a). By arranging the bearing unit 92 so as to be in contact with the first side L1 in the axial direction, the relative movement of the second bearing unit 92 to the second side L2 in the axial direction with respect to the first gear 10 is restricted.

In the present embodiment, the tubular portion 24 is formed so as to project from the radial extending portion 23 (specifically, the end portion of the radial inner D1 in the radial extending portion 23) to both sides in the axial direction L. Has been done. Then, in the present embodiment, the radial projecting portion 27 overlaps the radial extending portion 23 (specifically, the end portion of the radial inner D1 in the radial extending portion 23) and the arrangement region in the axial direction L. It is formed to do. Here, one of the pair of projecting portions 25 projecting on both sides in the axial direction L with respect to the radial extending portion 23 in the tubular portion 24 is referred to as a first projecting portion 25A, and the other is referred to as a second projecting portion 25B. Here, the side of the pair of protrusions 25 arranged on the first side L1 in the axial direction is referred to as the first protrusion 25A, and the side of the pair of protrusions 25 arranged on the second side L2 in the axial direction is the second protrusion. It is set to 25B. In the present embodiment, one of the pair of bearing units 90 (specifically, the first bearing unit 91) is supported by a portion formed by the first protruding portion 25A on the tubular inner peripheral surface 26, and the pair of bearings. The other side of the unit 90 (specifically, the second bearing unit 92) is supported by a portion of the tubular inner peripheral surface 26 formed by the second protrusion 25B. That is, the first bearing unit 91 is arranged between the outer peripheral surface of the target portion 13a and the inner peripheral surface of the first protruding portion 25A in the radial direction D, and the second bearing unit 92 is arranged with the outer peripheral surface of the target portion 13a. It is arranged between the inner peripheral surface of the second protruding portion 25B and the radial direction D. In the present embodiment, the portion formed by the first protruding portion 25A on the tubular inner peripheral surface 26 and the portion formed by the second protruding portion 25B on the tubular inner peripheral surface 26 are formed to have the same diameter. Has been done.

As described above, one of the pair of bearing units 90 is supported by the portion of the tubular inner peripheral surface 26 formed by the first protrusion 25A, and the other of the pair of bearing units 90 is the tubular inner peripheral surface 26. By configuring the structure to be supported by the portion formed by the second protruding portion 25B in the above, a portion supporting one of the pair of bearing units 90 on the tubular inner peripheral surface 26 and a pair of a pair on the tubular inner peripheral surface 26. The portion of the bearing unit 90 that supports the other can be divided into both sides in the axial direction L with respect to the connecting portion with the radial extending portion 23 in the tubular portion 24. Therefore, when both of the pair of bearing units 90 are arranged in the portion formed by the first protruding portion 25A on the tubular inner peripheral surface 26, or when both of the pair of bearing units 90 are arranged on the tubular inner peripheral surface 26. It is easy to secure high support rigidity of the first bearing 81 by the support portion 22 as compared with the case where it is arranged in the portion formed by the second protrusion 25B in the above.

The first bearing 81 is arranged radially inside D1 with respect to the gear teeth 11. Then, in the present embodiment, the first bearing 81 is arranged so as to overlap the gear teeth 11 in the radial direction along the radial direction D. Specifically, the first bearing unit 91 is radially inside D1 with respect to the gear teeth 11 and is arranged so as to overlap the gear teeth 11 in the radial direction.

As described above, the vehicle drive device 1 includes a second bearing 82 (specifically, a pair of second bearings 82) that supports a first rotor shaft 43 that rotates integrally with the first rotor 42. There is. Then, in the present embodiment, the arrangement region of the second bearing 82 in the axial direction L overlaps with the arrangement region of the first bearing 81 in the axial direction L. Specifically, the arrangement area in the axial direction L of the pair of second bearings 82 arranged on the second side L2 in the axial direction overlaps with the arrangement area in the axial direction L of the first bearing 81. .. In this embodiment, the first bearing 81 includes a plurality of (specifically, two) bearing units 90. When the first bearing 81 includes a plurality of bearing units 90 in this way, the arrangement region of the first bearing 81 in the axial direction L is the bearing unit 90 arranged in the most axial first side L1 in the axial direction L. It is a region between the end of the first side L1 in the axial direction and the end of the second side L2 in the axial direction of the bearing unit 90 arranged on the second side L2 in the axial direction. That is, in the arrangement region of the first bearing 81 in the axial direction L, in addition to the arrangement region of each of the bearing units 90 in the axial direction L, a space formed between the bearing units 90 adjacent to each other in the axial direction L ( The arrangement area in the axial direction L of the gap) is also included. In the present embodiment, the region in the axial direction L between the end of the axial first side L1 of the first bearing unit 91 and the end of the axial second side L2 of the second bearing unit 92 is the second. 1 This is an arrangement region of the bearing 81 in the axial direction L. In the example shown in FIG. 3, the arrangement region in the axial direction L of the second bearing 82 (specifically, the one arranged on the second side L2 in the axial direction of the pair of second bearings 82) is the second bearing. It overlaps with the arrangement area of the unit 92 in the axial direction L.

The vehicle drive device 1 includes a third bearing 83 that is arranged on one side of the axial direction L (specifically, the first side L1 in the axial direction) with respect to the internal teeth Ra of the ring gear R and supports the ring gear R. ing. The vehicle drive device 1 is further arranged on the other side (specifically, the second side L2 in the axial direction) of the ring gear R with respect to the internal teeth Ra of the ring gear R in the axial direction L to support the ring gear R. It has. In the example shown in FIG. 3, the third bearing 83 is located between the outer peripheral surface of the second protruding portion 25B (cylindrical portion formed on the partition wall 21C) and the inner peripheral surface of the gear forming member 38 in the radial direction D. Have been placed. Further, the fourth bearing 84 is arranged between the outer peripheral surface of the tubular portion formed on the second wall portion 21B and the inner peripheral surface of the gear forming member 38 in the radial direction D. As described above, the gear forming member 38 is arranged in the second accommodating chamber A2 in a state of being supported by the partition wall 21C and the second wall portion 21B. Then, in the present embodiment, the first bearing 81 is inside the third bearing 83 in the radial direction D so that the arrangement region of the third bearing 83 and the axial direction L overlaps (in other words, the diameter). It is arranged so as to overlap with the third bearing 83 in the directional view. Specifically, the second bearing unit 92 is arranged inside the third bearing 83 in the radial direction D so that the arrangement regions of the third bearing 83 and the axial direction L overlap. In the present embodiment, the internal tooth Ra corresponds to the "gear tooth of the ring gear".

[Other Embodiments]
Next, other embodiments of the vehicle drive device will be described.

(1) In the above embodiment, a configuration in which the tubular portion 24 is formed so as to project from the radial extending portion 23 on both sides in the axial direction L has been described as an example. However, the present disclosure is not limited to such a configuration, and the tubular portion 24 may be formed so as to project from the radial extending portion 23 only to one side in the axial direction L.

(2) In the above embodiment, the configuration in which the first bearing 81 includes a pair of bearing units 90 has been described as an example. However, the present disclosure is not limited to such a configuration, and for example, the first bearing 81 may be configured to include only one bearing unit 90. In this case, it is preferable that the bearing unit 90 included in the first bearing 81 is, for example, a double-row bearing (for example, a double-row angular contact ball bearing).

(3) In the above embodiment, the first bearing 81 is arranged inside the third bearing 83 in the radial direction D so that the arrangement region of the third bearing 83 and the axial direction L overlap. The configuration has been described as an example. However, the present disclosure is not limited to such a configuration, and the first bearing 81 may be arranged so that the arrangement region in the axial direction L does not overlap with the third bearing 83.

(4) In the above embodiment, the configuration in which the arrangement region of the second bearing 82 in the axial direction L overlaps with the arrangement region of the first bearing 81 in the axial direction L has been described as an example. However, the present disclosure is not limited to such a configuration, and the arrangement region of the second bearing 82 in the axial direction L may be configured so as not to overlap with the arrangement region of the first bearing 81 in the axial direction L.

(5) In the above embodiment, the configuration in which the first bearing 81 is arranged so as to overlap the gear teeth 11 in the radial direction along the radial direction D has been described as an example. However, the present disclosure is not limited to such a configuration, and the first bearing 81 may be arranged so as not to overlap with the gear teeth 11 in the radial direction.

(6) In the above embodiment, an example is a configuration in which the rotation sensor 45 is arranged between the pair of second bearings 82 in the axial direction L and on the first side L1 in the axial direction with respect to the first rotor 42. It was explained as. However, the present disclosure is not limited to such a configuration, for example, the rotation sensor 45 is between the pair of second bearings 82 in the axial direction L, and the second side L2 in the axial direction with respect to the first rotor 42. It can also be configured to be placed in.

(7) In the above embodiment, the configuration in which the tooth portion 12 of the first gear 10 is arranged on the first side L1 in the axial direction with respect to the partition wall 21C has been described as an example. However, the present disclosure is not limited to such a configuration, and the tooth portion 12 of the first gear 10 may be arranged on the second side L2 in the axial direction with respect to the partition wall 21C. In this case, the target portion 13a is a portion of the first side L1 in the axial direction with respect to the connecting portion 14 in the shaft portion 13. Then, the first output gear 44 is arranged on the second side L2 in the axial direction with respect to the partition wall 21C. That is, the first output gear 44 is arranged not between the pair of second bearings 82 in the axial direction L, but on the second side L2 in the axial direction with respect to the pair of second bearings 82. In this case, the first output gear 44 is, for example, with respect to the partition wall 21C in the first rotor shaft 43 arranged so as to extend along the axial direction L through the through hole formed in the partition wall 21C. It is provided in a portion arranged on the second side L2 in the axial direction. In this case, for example, the first rotor shaft 43 is provided with a first shaft member (a shaft member supported by a pair of second bearings 82) to which the first rotor 42 is fixed, and a second output gear 44. A shaft member may be provided, and the first shaft member and the second shaft member may be connected so as to rotate integrally.

(8) In the above embodiment, a configuration in which the second output gear 54 that rotates integrally with the second rotor 52 of the second rotary electric machine 5 meshes with the outer peripheral gear 39 that rotates integrally with the ring gear R will be described as an example. did. However, the present disclosure is not limited to such a configuration, and for example, the second output gear 54 may be configured to mesh with the first counter gear 61. Further, the second rotary electric machine 5 and the distribution differential gear mechanism 3 may be driven and connected via a mechanism other than the gear mechanism (for example, a belt mechanism, a chain mechanism, etc.).

(9) In the above embodiment, the configuration in which the second counter gear 62 is arranged on the first side L1 in the axial direction with respect to the first counter gear 61 has been described as an example. However, the present disclosure is not limited to such a configuration, and the second counter gear 62 may be arranged on the second side L2 in the axial direction with respect to the first counter gear 61.

(10) In the above embodiment, the configuration in which the vehicle drive device 1 includes the counter gear mechanism 6 has been described as an example. However, the present disclosure is not limited to such a configuration, and the vehicle drive device 1 may be configured not to include the counter gear mechanism 6. In this case, for example, the outer peripheral gear 39 may be configured to mesh with the differential input gear 71, or an idler gear that meshes with both the outer peripheral gear 39 and the differential input gear 71 may be provided instead of the counter gear mechanism 6. Can be done.

(11) In the above embodiment, the first rotating element 31 that is driven and connected to the first rotating electric machine 4 is the sun gear S, and the second rotating element 32 that is driven and connected to the input member 2 is the carrier C. The configuration in which the third rotating element 33, which is driven and connected to the two-rotating electric machine 5 and the output member 9, is a ring gear R has been described as an example. However, the present disclosure is not limited to such a configuration, for example, the first rotating element 31 is the sun gear S, the second rotating element 32 is the ring gear R, and the third rotating element 33 is the carrier C. You can also do it. In this case, the differential gear mechanism does not have a power distribution function, but has a function of combining the torque of the input member 2 and the torque of the first rotary electric machine 4 and transmitting the torque to the second rotary electric machine 5 and the output member 9.

(12) In the above embodiment, a configuration in which the differential gear mechanism (the distribution differential gear mechanism 3 in the above embodiment) is a single pinion type planetary gear mechanism has been described as an example. However, the present disclosure is not limited to such a configuration, and for example, the differential gear mechanism may be a double pinion type planetary gear mechanism.

(13) The configurations disclosed in each of the above-described embodiments shall be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction between the embodiments described as the other embodiments. (Including combinations) is also possible. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be made as appropriate without departing from the gist of the present disclosure.

[Summary of this embodiment]
Hereinafter, the outline of the vehicle drive device described above will be described.

The vehicle drive device (1) includes an input member (2) that is driven and connected to the internal combustion engine (EG), an output member (9) that is driven and connected to the wheels (W), and a first rotary electric machine (4). The second rotating electric machine (5) and the differential gear mechanism (3) are provided, and the differential gear mechanism (3) is driven and connected to the first rotating electric machine (4). 31), a second rotating element (32) that is driven and connected to the input member (2), and a third rotating element (33) that is driven and connected to the second rotating electric machine (5) and the output member (9). ), And a first gear (10) that rotates integrally with the first rotating element (31) and a first rotor (42) that rotates integrally with the first rotating electric machine (4). The two gears (44) are in mesh with each other, and the first rotary electric machine (4), the second rotary electric machine (5), the differential gear mechanism (3), the first gear (10), and the above. The second gear (44) is housed in the case (20), and the case (20) is the first storage chamber (A1) in which the first rotary electric machine (4) and the second rotary electric machine (5) are housed. ) And the second accommodating chamber (A2) in which the differential gear mechanism (3) is accommodated, the partition wall (21C) is provided, and the partition wall (21C) is the first gear (10). A support portion (22) extending in the radial direction (D) with respect to the rotation axis (X1) is provided, and the first gear (10) is a gear tooth (11) that meshes with the second gear (44). The shaft portion (13) is provided with a tooth portion (12) formed of the above, a shaft portion (13), and a connecting portion (14) for connecting the tooth portion (12) and the shaft portion (13). ), The portion on one side in the axial direction (L) with respect to the connecting portion (14) is set as the target portion (13a), and the first gear (10) is the target portion (13a) and the support portion (22). ) And the first bearing (81) arranged between the radial direction (D) and the support portion (22) in a cantilevered state.

In this configuration, the first rotating electric machine (4) and the first rotating element (31) can be driven and connected via the meshing portion between the first gear (10) and the second gear (44). Even when the one-rotating electric machine (4) is arranged on a shaft different from that of the differential gear mechanism (3), the first rotating electric machine (4) and the first rotating element (31) are properly driven and connected. be able to. By arranging the first rotary electric machine (4) on a shaft different from the differential gear mechanism (3), the degree of freedom in the arrangement of the first rotary electric machine (4) is increased, whereby the second rotary electric machine (5) The restriction on the placement position of the second rotary electric machine (5) is relaxed, and the degree of freedom in placement of the second rotary electric machine (5) is also increased. Therefore, the restrictions on the outer shape of the vehicle drive device (1) can be relaxed, and it becomes easy to realize the vehicle drive device (1) having excellent mountability on the vehicle.

Then, in this configuration, the first gear (10) for driving and connecting the first rotary electric machine (4) and the differential gear mechanism (3) arranged on different shafts is via the first bearing (81). It is supported by the support portion (22) in a cantilevered state. Therefore, as compared with the case where the first gear (10) is supported by the case (20) via bearings on both sides in the axial direction (L), the axial direction (22) required for arranging the support portion (22) is required. By keeping the space of L) small and providing the support portion (22), it is possible to suppress the increase in size of the vehicle drive device (1) in the axial direction (L). Furthermore, in this configuration, the support portion (22) that supports the first gear (10) uses a partition wall (21C) that separates the first accommodation chamber (A1) and the second accommodation chamber (A2). Since it can be formed, it is easy to suppress an increase in size of the vehicle drive device (1) in the axial direction (L) by providing the support portion (22). As a result, in this configuration, when the first rotary electric machine (4) is arranged on a shaft different from that of the differential gear mechanism (3), it is possible to suppress the increase in size of the vehicle drive device (1) in the axial direction (L). It is possible to do.

Here, the case (20) includes a wall portion (21B) arranged on the side opposite to the partition wall (21C) side in the axial direction (L) with respect to the second storage chamber (A2). , The rotating member (38) on which the third rotating element (33) is formed is arranged in the second accommodating chamber (A2) in a state of being supported by the partition wall (21C) and the wall portion (21B). It is preferable that it is.

According to this configuration, one side of the rotating member (38) in the axial direction (L) can be supported by a partition wall (21C) on which a support portion (22) for supporting the first gear (10) is formed. it can. That is, the partition wall (21C) and the wall portion (21B) can support two members, the first gear (10) and the rotating member (38). Therefore, such an additional wall portion is provided as compared with the case where the rotating member (38) is supported by the wall portion (21B) and the additional wall portion provided separately from the partition wall (21C). It is possible to reduce the size of the vehicle drive device (1) in the axial direction (L) by an unnecessary amount.

Further, a pair of second bearings (82) for supporting the rotor shaft (43) that rotates integrally with the first rotor (42) are provided with respect to the partition wall (21C) in the axial direction (L). The side on which the first storage chamber (A1) is arranged is set as the first side (L1) in the axial direction, and the tooth portion (12) is the first side (L1) in the axial direction with respect to the partition wall (21C). The first rotor (42) and the second gear (44) are arranged between the axial direction (L) of the pair of the second bearings (82), and the axial direction (L). Is arranged on the axial second side (L2) of the pair of the second bearings (82) with the side opposite to the axial first side (L1) as the axial second side (L2). It is preferable that the arrangement region in the axial direction (L) of the side overlaps with the arrangement region in the axial direction (L) of the first bearing (81).

According to this configuration, the support structure of the differential gear mechanism (3) is provided as compared with the case where the tooth portion (12) is arranged on the second side (L2) in the axial direction with respect to the partition wall (21C). The support structure of the first gear (10) can be provided without significantly changing the support structure when the one-turn electric machine (4) is arranged coaxially with the differential gear mechanism (3). Therefore, it is possible to reduce the development cost and the manufacturing cost of the vehicle drive device (1).

Further, according to this configuration, the second gear (44) can be supported by using a pair of second bearings (82) that support the rotor shaft (43). Therefore, the size of the vehicle drive device (1) in the axial direction (L) should be reduced as compared with the case where the bearing supporting the second gear (44) is provided separately from the pair of second bearings (82). Can be done. In this configuration, since the second gear (44) can be arranged in the first accommodation chamber (A1) in which the second rotary electric machine (5) is accommodated, a pair of first gears supporting the rotor shaft (43). A configuration in which the second gear (44) is arranged between the axial directions (L) of the two bearings (82) can be realized relatively easily.

Further, according to this configuration, the axial (L) arrangement region of the pair of second bearings (82) arranged on the axial second side (L2) is the axis of the first bearing (81). Since the first rotary electric machine (4) and the differential gear mechanism (3) can be arranged close to the axial direction (L) so as to overlap the arrangement area in the direction (L), the vehicle drive device ( It is possible to reduce the size in the axial direction (L) of 1).

Further, the differential gear mechanism (3) includes a sun gear (S) which is the first rotating element (31), a carrier (C) which is the second rotating element (32), and the third rotating element (3). It is a planetary gear mechanism including the ring gear (R) which is 33), and is arranged on one side of the axial direction (L) with respect to the gear teeth (Ra) of the ring gear (R). ) Is provided, and the first bearing (81) is inside the radial direction (D) with respect to the third bearing (83), and the third bearing (83) is provided. ) And the axial direction (L) are arranged so as to overlap each other.

According to this configuration, the arrangement area of the first bearing (81) in the axial direction (L) overlaps with the arrangement area of the third bearing (83) in the axial direction (L) of the first gear (10). Since the differential gear mechanism (3) can be arranged close to the axial direction (L), the vehicle drive device (1) can be miniaturized in the axial direction (L). In this configuration, when the single pinion type planetary gear mechanism is used as the differential gear mechanism (3), the torque of the input member (2) is applied to the first rotary electric machine (4) and the second rotary electric machine. The differential gear mechanism (3) can realize the power distribution function of distributing the power to the (5) and the output member (9).

As described above, in a configuration in which the differential gear mechanism (3) is a planetary gear mechanism including the sun gear (S), the carrier (C), and the ring gear (R), the differential gear mechanism (3) is integrated with the ring gear (R). A third gear (39) that rotates integrally with the third gear (39) and a fourth gear (54) that rotates integrally with the second rotor (52) of the second rotating electric machine (5) and meshes with the third gear (39). It is preferable to have.

As described above, in the vehicle drive device (1) of the present disclosure, by arranging the first rotary electric machine (4) on a shaft different from the differential gear mechanism (3), the second rotary electric machine (5) The degree of freedom of placement can be increased. As a result of increasing the degree of freedom in arranging the second rotary electric machine (5) in this way, for example, as in this configuration, the second gear (39) and the fourth gear (54) are engaged with each other to form a second gear. A configuration in which the rotary electric machine (5) and the ring gear (R) which is the third rotating element (33) are driven and connected (that is, the second rotary electric machine (5) is arranged in the vicinity of the differential gear mechanism (3). Configuration) can be realized relatively easily.

The vehicle drive device according to the present disclosure may be capable of exerting at least one of the above-mentioned effects.

1: Vehicle drive device, 2: Input member, 3: Distributing differential gear mechanism (differential gear mechanism), 4: 1st rotary electric machine, 5: 2nd rotary electric machine, 9: Output member, 10: 1st Gear, 11: Gear tooth, 12: Tooth part, 13: Shaft part, 13a: Target part, 14: Connecting part, 20: Case, 21B: Second wall part (wall part), 21C: Partition wall, 22: Support Part, 31: 1st rotating element, 32: 2nd rotating element, 33: 3rd rotating element, 38: gear forming member (rotating member), 39: outer peripheral gear (3rd gear), 42: 1st rotor, 43 : 1st rotor shaft (rotor shaft), 44: 1st output gear (2nd gear), 52: 2nd rotor, 54: 2nd output gear (4th gear), 81: 1st bearing, 82: 2nd Bearing, 83: 3rd bearing, A1: 1st accommodation chamber, A2: 2nd accommodation chamber, C: carrier, D: radial direction, EG: internal combustion engine, L: axial direction, L1: axial first side, L2 : 2nd side in axial direction, R: ring gear, Ra: internal tooth (gear tooth of ring gear), S: sun gear, W: wheel, X1: 1st axis (rotation axis of 1st gear)

Claims (5)

A vehicle drive device including an input member that is driven and connected to an internal combustion engine, an output member that is driven and connected to wheels, a first rotary electric machine, a second rotary electric machine, and a differential gear mechanism.
The differential gear mechanism is driven and connected to the first rotating electric machine, the second rotating element that is driven and connected to the input member, the second rotating electric machine, and the output member. With a third rotating element,
The first gear that rotates integrally with the first rotating element and the second gear that rotates integrally with the first rotor of the first rotating electric machine are in mesh with each other.
The first rotary electric machine, the second rotary electric machine, the differential gear mechanism, the first gear, and the second gear are housed in a case.
The case includes a partition wall that separates a first storage chamber in which the first rotary electric machine and the second rotary electric machine are housed and a second storage chamber in which the differential gear mechanism is housed.
The partition wall includes a support portion extending in the radial direction with respect to the rotation axis of the first gear.
The first gear includes a tooth portion on which a gear tooth that meshes with the second gear is formed, a shaft portion, and a connecting portion that connects the tooth portion and the shaft portion.
A portion of the shaft portion on one side in the axial direction with respect to the connecting portion is set as a target portion.
The first gear is a vehicle drive device that is cantilevered and supported by the support portion via a first bearing arranged between the target portion and the support portion in the radial direction. The case includes a wall portion arranged on the side opposite to the partition wall side in the axial direction with respect to the second storage chamber.
The vehicle drive device according to claim 1, wherein the rotating member on which the third rotating element is formed is arranged in the second accommodating chamber in a state of being supported by the partition wall and the wall portion. A pair of second bearings that support a rotor shaft that rotates integrally with the first rotor are provided.
The side where the first storage chamber is arranged with respect to the partition wall in the axial direction is defined as the first side in the axial direction.
The tooth portion is arranged on the first side in the axial direction with respect to the partition wall.
The first rotor and the second gear are arranged between the axial directions of the pair of the second bearings.
The side opposite to the first side in the axial direction in the axial direction is the second side in the axial direction, and the arrangement region in the axial direction of the pair of the second bearings arranged on the second side in the axial direction is The vehicle drive device according to claim 1 or 2, which overlaps with the axial arrangement region of the first bearing. The differential gear mechanism is a planetary gear mechanism including the sun gear which is the first rotating element, the carrier which is the second rotating element, and the ring gear which is the third rotating element.
A third bearing which is arranged on one side in the axial direction with respect to the gear teeth of the ring gear and supports the ring gear is provided.
Any of claims 1 to 3, wherein the first bearing is inside the third bearing in the radial direction and is arranged so that the arrangement region in the axial direction overlaps with the third bearing. The vehicle drive device according to item 1. A third gear that rotates integrally with the ring gear,
The vehicle drive device according to claim 4, further comprising a fourth gear that rotates integrally with the second rotor of the second rotary electric machine and meshes with the third gear.

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