JP2016175575A - Vehicle drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the energy efficiency in a vehicle drive device which enables one motor electric travel mode and a direct coupling stage of the parallel travel mode.SOLUTION: A vehicle drive device (1) includes: a first rotary electric machine (20); a second rotary electric machine (30); a differential gear unit (40); a dog clutch mechanism (50); and a one-way clutch (70). A second member (72) of the one-way clutch (70) is coupled to a second rotary element (E2) or a third rotary element (E3). The dog clutch mechanism (50) connects a first rotary element (E1) with a first member (71) in a first state, connects the first rotary element (E1) with the first rotary electric machine (20) in a second state, and connects the first rotary element (E1) with a non-rotary member (5) in a third state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle drive device.

  Hybrid vehicles using an internal combustion engine and a rotating electric machine as a driving force source for wheels have been put into practical use. As an example of a vehicle drive device used in such a hybrid vehicle, a device disclosed in Japanese Patent Application Laid-Open No. 2008-11148 (Patent Document 1) is known. The device of Patent Document 1 is mainly configured by a first rotating electrical machine, a second rotating electrical machine, a differential gear device having three rotating elements, and a dog clutch mechanism. In this device, the electric travel mode, the parallel travel mode (including two shift stages), and the split mode can be switched by switching the axial position of the sleeve member of the dog clutch mechanism.

  However, in the apparatus of Patent Document 1, the sun gear and the first rotating electrical machine are coupled so as to always rotate integrally. For this reason, in the one-motor electric travel mode using the second rotating electrical machine, either the internal combustion engine or the first rotating electrical machine is accompanied and energy loss occurs. Further, when the direct connection stage is formed in the parallel traveling mode, the first rotating electrical machine is accompanied and energy loss occurs.

JP 2008-1114848 A

  It is desired to improve energy efficiency in a vehicle drive device capable of realizing a direct connection stage of an electric travel mode or a parallel travel mode.

A vehicle drive device according to the present disclosure includes:
An input member drivingly connected to the internal combustion engine;
An output member drivingly connected to the wheel;
The first rotating electrical machine,
A second rotating electric machine drivingly connected to the output member;
A differential gear device having three rotating elements to be a first rotating element, a second rotating element, and a third rotating element in the order of rotational speed;
A dog clutch mechanism having a sleeve member and capable of switching the axial position of the sleeve member to a first position, a second position, and a third position;
A one-way clutch having a first member and a second member, and restricting the direction of relative rotation between the first member and the second member in one direction,
The input member is coupled to one of the second rotating element and the third rotating element;
The output member is coupled to the other of the second rotating element and the third rotating element;
The second member is connected to the second rotating element or the third rotating element;
The dog clutch mechanism is
In the first state where the sleeve member is located at the first position, the first rotating element is coupled to the first member and separated from the first rotating electrical machine,
In the second state where the sleeve member is located at the second position, the first rotating element is coupled to the first rotating electrical machine and separated from the first member and the non-rotating member,
The first rotating element is fixed to the non-rotating member in a third state in which the sleeve member is located at the third position.

  According to this configuration, the second rotary electric machine is used by using a three-position switching type dog clutch mechanism, a three-element differential gear device, and a one-way clutch, and setting the connection relationship as described above. The rotation of the first rotating electric machine can be avoided when the direct drive stage of the electric drive mode or the parallel drive mode of the motor is realized. In other words, in the first state of the dog clutch mechanism, the first rotating element is separated from the first rotating electric machine, so even if the internal combustion engine is stopped during the electric running mode of one motor, the first rotating electric machine is not accompanied. . Further, since the second member of the one-way clutch is connected to the second rotating element or the third rotating element, and the first member is connected to the first rotating element in the first state of the dog clutch mechanism, the internal combustion engine is driven. In the parallel traveling mode, the first rotating electrical machine is not accompanied and the one-way clutch is locked according to the output of the internal combustion engine to form a direct coupling stage. Therefore, in the vehicle drive device that can realize the direct drive stage of the electric drive mode and the parallel drive mode of one motor, energy loss can be suppressed to a low level and the energy efficiency can be improved.

  Further features and advantages of the technology according to the present disclosure will become more apparent from the following description of exemplary and non-limiting embodiments described with reference to the drawings.

Skeleton diagram of the vehicle drive device according to the first embodiment Schematic diagram showing the first state of the dog clutch mechanism Schematic diagram showing the second state of the dog clutch mechanism Schematic diagram showing the third state of the dog clutch mechanism Speed diagram in the first electric drive mode Speed diagram in the second electric drive mode Speed diagram in continuously variable mode Speed diagram in parallel travel mode (1st speed) Speed diagram in parallel travel mode (2nd speed) Schematic diagram showing mode transition between multiple driving modes Skeleton diagram of vehicle drive device according to second embodiment Speed diagram in the first electric drive mode Speed diagram in the second electric drive mode Speed diagram in continuously variable mode Speed diagram in parallel travel mode (1st speed) Speed diagram in parallel travel mode (2nd speed) Skeleton diagram of vehicle drive device according to another aspect

[First Embodiment]
A first embodiment of a vehicle drive device will be described. The vehicle drive device 1 is a drive for driving a vehicle (hybrid vehicle) including both the internal combustion engine EG and the rotating electrical machine (the first rotating electrical machine 20 and the second rotating electrical machine 30) as a driving force source for the wheels W. This is a device (drive device for a hybrid vehicle).

  In the following description, “drive coupling” means a state in which two rotating elements are coupled so as to be able to transmit a driving force (synonymous with torque). This concept includes a state in which the two rotating elements are connected so as to rotate integrally, and a state in which the driving force is transmitted through 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 engaging devices (frictions) that selectively transmit rotation and driving force. Engagement devices, meshing engagement devices, etc.).

  The “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator that performs both functions of the motor and the generator as necessary.

  The “rotation speed” of each rotating member represents a rotation speed based on the direction of rotation of the internal combustion engine EG being driven. That is, when each rotating member rotates in the same direction as the rotation direction when the rotation of the internal combustion engine EG being driven is transmitted, the rotation speed becomes “positive”, and is opposite to the rotation direction. When rotating, the rotation speed becomes “negative”. For the same purpose, “rotating positively” means that each rotating member rotates in the same direction as the rotation direction when the rotation of the driving internal combustion engine EG is transmitted, and “negatively rotates”. Means to rotate in the direction opposite to the direction of the rotation.

  As shown in FIG. 1, the vehicle drive device 1 includes an input member 10, a first rotating electrical machine 20, a second rotating electrical machine 30, a differential gear device 40, and an output member 46 as basic configurations. Yes. Further, the vehicle drive device 1 includes a three-position switching dog clutch mechanism 50 and a first one-way clutch 70 in addition to the above basic configuration. In the present embodiment, the vehicle drive device 1 further includes a second one-way clutch 75, a counter gear mechanism 80, and an output device (output differential gear device) 85. These are accommodated in a case (drive device case) 5. In the present embodiment, the case 5 corresponds to a “non-rotating member”. The input member 10, the second one-way clutch 75, the differential gear device 40, the output member 46, the first one-way clutch 70, the dog clutch mechanism 50, and the first rotating electrical machine 20 are arranged coaxially.

  The input member 10 is drivingly connected to the internal combustion engine EG. The internal combustion engine EG is a prime mover (such as a gasoline engine or a diesel engine) that is driven by combustion of fuel inside the engine to extract power. The input member 10 may be constituted by a shaft member, for example. The input member 10 is drivingly connected to an internal combustion engine output shaft (crankshaft or the like) that is an output shaft of the internal combustion engine EG. The input member 10 and the internal combustion engine output shaft may be directly connected or may be connected via another member such as a damper. Further, the input member 10 is connected to the input rotation element Ei of the differential gear device 40.

  A second one-way clutch 75 is provided between the input member 10 and the case 5. The second one-way clutch 75 includes an inner rotation element 76, an outer rotation element 77, and a driving force transmission member (such as a roller or a sprag) that selectively transmits a driving force therebetween. The second one-way clutch 75 restricts the direction of relative rotation between the inner rotation element 76 and the outer rotation element 77 in one direction. In the present embodiment, the second one-way clutch 75 allows a state in which the rotation speed of the inner rotation element 76 is higher than the rotation speed of the outer rotation element 77 and the inner rotation element 76 compared to the rotation speed of the outer rotation element 77. The rotation speed of the is controlled to be low. The inner rotation element 76 is connected to the input member 10. The outer rotating element 77 is fixed to the case 5. Thus, the second one-way clutch 75 allows the input member 10 to rotate forward and restricts the input member 10 from rotating negatively.

  The first rotating electrical machine 20 includes a first stator 21 fixed to the case 5 and a first rotor 22 rotatably supported on the radial inner side of the first stator 21. The first rotor 22 is drivingly connected to the dog clutch mechanism 50 via the first rotor shaft 23. A third external tooth forming member 57 constituting the dog clutch mechanism 50 is connected to an end of the first rotor shaft 23 on the differential gear device 40 side (see FIG. 2). Third external teeth 53 are formed on the outer peripheral surface of the third external tooth forming member 57. As will be described in detail later, the first rotating electrical machine 20 can be connected to the first rotating element E1 of the differential gear device 40 via the dog clutch mechanism 50 and can be separated from the first rotating element E1 by the dog clutch mechanism 50. It has become.

  The second rotating electrical machine 30 includes a second stator 31 fixed to the case 5 and a second rotor 32 that is rotatably supported on the radially inner side of the second stator 31. The second rotor 32 is connected to the second rotating electrical machine output gear 33. The second rotor 32 is drivingly connected to the output member 46 via the second rotating electrical machine output gear 33 and the counter gear mechanism 80.

  The first rotating electrical machine 20 and the second rotating electrical machine 30 are disposed on the side opposite to the internal combustion engine EG side in the axial direction with respect to the differential gear device 40 so that the axially disposed regions overlap each other. A dog clutch mechanism 50 and a first one-way clutch 70 are disposed between the first rotating electrical machine 20 and the differential gear device 40 in the axial direction. The differential gear device 40, the first one-way clutch 70, the dog clutch mechanism 50, and the first rotating electrical machine 20 are arranged in the order described in the axial direction from the internal combustion engine EG side.

  In the present embodiment, the differential gear device 40 is configured by a single pinion type planetary gear mechanism. The differential gear device 40 has three rotating elements, a sun gear 41, a carrier 42, and a ring gear 43. The differential gear device 40 includes a carrier 42 that supports a plurality of pinions, and a sun gear 41 and a ring gear 43 that mesh with the pinions, respectively. These three rotating elements of the differential gear device 40 are a sun gear 41, a carrier 42, and a ring gear 43 in order of rotational speed. In the present embodiment, the sun gear 41 is the first rotating element E1, the carrier 42 is the second rotating element E2, and the ring gear 43 is the third rotating element E3.

  The “order of rotational speed” means the order of rotational speed in the rotational state of each rotating element. The rotational speed of each rotating element varies depending on the rotational state of the differential gear device 40, but the order in which the rotational speeds of the respective rotating elements are arranged is determined by the structure of the differential gear device 40 and is therefore constant. . The “order of rotational speed of each rotating element” is equal to the order of arrangement of the rotating elements in the speed diagram (also referred to as a collinear diagram).

  As shown in FIG. 2, the sun gear 41 that is the first rotating element E <b> 1 is connected to the dog clutch mechanism 50 via the first intermediate shaft 60. The sun gear 41 is formed on the outer peripheral surface of the sun gear forming member 61. A second external tooth forming member 56 constituting the dog clutch mechanism 50 is connected to the other axial end of the first intermediate shaft 60 provided with the sun gear forming member 61 at one axial end. Second external teeth 52 are formed on the outer peripheral surface of the second external tooth forming member 56. Thus, the sun gear 41 rotates integrally with the second external tooth 52.

  The carrier 42 as the second rotating element E2 which is one of the second rotating element E2 and the third rotating element E3 is connected to the input member 10. If the rotation element connected to the input member 10 is defined as “input rotation element Ei”, in this embodiment, the carrier 42 becomes the input rotation element Ei. The carrier 42 that is the input rotation element Ei is connected to the first one-way clutch 70. The carrier 42 is connected to the outer rotating element 72 of the first one-way clutch 70. Further, the carrier 42 is drivingly connected to the dog clutch mechanism 50 via the first one-way clutch 70 and the second intermediate shaft 65.

  The ring gear 43 as the third rotating element E3, which is the other of the second rotating element E2 and the third rotating element E3, is connected to the output member 46. If the rotation element connected to the output member 46 is defined as “output rotation element Eo”, in this embodiment, the ring gear 43 becomes the output rotation element Eo. The ring gear 43 is formed on the inner peripheral surface of a cylindrical ring gear forming member 45. In this embodiment, the output member 46 is configured as an external gear output gear formed on the outer peripheral surface of the ring gear forming member 45. As shown in FIG. 1, the output member 46 is drivingly connected to the wheels W via a counter gear mechanism 80, an output device 85, and a pair of left and right axles 90.

  As shown in FIG. 2, the second intermediate shaft 65 is configured as a hollow shaft, and is arranged coaxially with the first intermediate shaft 60 and overlapping in the radial direction. The second intermediate shaft 65 is disposed so as to surround the first intermediate shaft 60. The second intermediate shaft 65 is disposed between the differential gear device 40 and the dog clutch mechanism 50 in the axial direction.

  A first one-way clutch 70 is provided between the carrier 42 as the input rotation element Ei and the second intermediate shaft 65. The first one-way clutch 70 includes an inner rotation element 71, an outer rotation element 72, and a driving force transmission member (such as a roller or a sprag) that selectively transmits a driving force therebetween. The first one-way clutch 70 regulates the direction of relative rotation between the inner rotating element 71 and the outer rotating element 72 in one direction. In the present embodiment, the first one-way clutch 70 allows a state in which the rotation speed of the inner rotation element 71 is lower than the rotation speed of the outer rotation element 72 and the inner rotation element 71 compared to the rotation speed of the outer rotation element 72. It regulates that the rotation speed of becomes high.

  The inner rotation element 71 is connected to the second intermediate shaft 65. The outer rotating element 72 is connected to the carrier 42 which is the second rotating element E2. Thereby, the first one-way clutch 70 allows a state in which the rotational speed of the element that rotates integrally with the second intermediate shaft 65 is lower than the rotational speed of the carrier 42 and the second intermediate shaft compared with the rotational speed of the carrier 42. An increase in the rotational speed of the element that rotates integrally with 65 is restricted. In the present embodiment, the first one-way clutch 70 corresponds to a “one-way clutch”. Further, the inner rotation element 71 corresponds to a “first member”, and the outer rotation element 72 corresponds to a “second member”.

  At the end of the second intermediate shaft 65 to which the inner rotating element 71 of the first one-way clutch 70 is connected, on the side opposite to the differential gear device 40 side in the axial direction, the first external teeth constituting the dog clutch mechanism 50 The forming member 55 is connected. First outer teeth 51 are formed on the outer peripheral surface of the first outer tooth forming member 55.

  The dog clutch mechanism 50 includes a first external tooth forming member 55 having first external teeth 51, a second external tooth forming member 56 having second external teeth 52, and a third external tooth forming member having third external teeth 53. 57, an internal tooth forming member 58 having internal teeth 54, and a cylindrical sleeve member 59. The first external teeth 51 rotate integrally with the inner rotation element 71 of the first one-way clutch 70. The second external teeth 52 rotate integrally with the sun gear 41. The third external teeth 53 rotate integrally with the first rotor 22. The first external teeth 51, the second external teeth 52, and the third external teeth 53 are arranged in the order described in the axial direction from the differential gear device 40 side to the first rotating electrical machine 20 side. The first external teeth 51, the second external teeth 52, and the third external teeth 53 are set to have the same number of teeth and the same pitch circle diameter. The internal tooth forming member 58 may be configured as a part of the case 5, or may be configured separately from the case 5 and fixed to the case 5. In any case, the internal teeth 54 are fixedly held on the inner surface of the case 5. The inner teeth 54 are disposed at positions that are the same as the third outer teeth 53 in the axial direction and slightly deviated from the third outer teeth 53 toward the first rotating electrical machine 20.

  Inner teeth that selectively mesh with the first outer teeth 51, the second outer teeth 52, and the third outer teeth 53 are formed on the inner peripheral surface of the sleeve member 59. Outer teeth that mesh with the inner teeth 54 are formed on the outer peripheral surface of the sleeve member 59. The form of engagement between the first external teeth 51, the second external teeth 52, and the third external teeth 53 with the internal teeth of the sleeve member 59 and the engagement between the internal teeth 54 and the external teeth of the sleeve member 59 are as follows: There is no particular limitation as long as the relative movement in the axial direction is allowed. Examples of preferred engagement forms include spline engagement and serration engagement.

  The dog clutch mechanism 50 includes an actuator (not shown) that slides the sleeve member 59 along the axial direction. The dog clutch mechanism 50 can switch the axial position of the sleeve member 59 to the first position P1, the second position P2, and the third position P3 according to the drive control of the actuator (see FIGS. 2 to 4). reference). The dog clutch mechanism 50 includes a first state where the sleeve member 59 is located at the first position P1, a second state where the sleeve member 59 is located at the second position P2, and a third state where the sleeve member 59 is located at the third position P3. The state can be switched. In the present embodiment, the second position P2 is located between the first position P1 and the third position P3, and the first position P1, the second position P2, and the third position P3 are in the axial direction. They are arranged in the order described from the differential gear device 40 side toward the first rotating electrical machine 20 side. As a result, the first state and the third state transition through the second state.

  As shown in FIG. 2, in the first state where the sleeve member 59 is located at the first position P <b> 1, the inner teeth of the sleeve member 59 mesh with the first outer teeth 51 and the second outer teeth 52 simultaneously. In the first state, the internal teeth of the sleeve member 59 do not mesh with the third external teeth 53, and the external teeth of the sleeve member 59 do not mesh with the internal teeth 54. Thereby, the dog clutch mechanism 50 connects the inner rotation element 71 of the first one-way clutch 70 and the sun gear 41 that is the first rotation element E1 of the differential gear device 40 in the first state. That is, the dog clutch mechanism 50 connects the first rotating element E1 to the inner rotating element 71 and separates the first rotating element E1 from the first rotating electrical machine 20 in the first state.

  As shown in FIG. 3, in the second state in which the sleeve member 59 is located at the second position P <b> 2, the inner teeth of the sleeve member 59 mesh with the second outer teeth 52 and the third outer teeth 53 simultaneously. In the second state, the internal teeth of the sleeve member 59 do not mesh with the first external teeth 51, and the external teeth of the sleeve member 59 do not mesh with the internal teeth 54. Thereby, the dog clutch mechanism 50 connects the sun gear 41 that is the first rotating element E1 of the differential gear device 40 and the first rotor 22 of the first rotating electrical machine 20 in the second state. That is, the dog clutch mechanism 50 connects the first rotating element E1 to the first rotating electrical machine 20 and separates the first rotating element E1 from the inner rotating element 71 and the case 5 in the second state.

  As shown in FIG. 4, in the third state in which the sleeve member 59 is located at the third position P3, the inner teeth of the sleeve member 59 mesh with the second outer teeth 52, and at the same time, the outer teeth of the sleeve member 59 become the inner teeth. 54. In the third state, the inner teeth of the sleeve member 59 simultaneously mesh with the third outer teeth 53. The inner teeth of the sleeve member 59 do not mesh with the first outer teeth 51. Thereby, the dog clutch mechanism 50 fixes the sun gear 41 that is the first rotating element E1 of the differential gear device 40 and the first rotor 22 of the first rotating electrical machine 20 to the case 5 in the third state.

  The sleeve member 59 always meshes with the second external teeth 52 and additionally meshes with any one of the first external teeth 51, the third external teeth 53, and the internal teeth 54 according to the axial position (the internal teeth 54). When meshing, it meshes with the third external teeth 53 at the same time). As a result, the sun gear 41 as the first rotating element E1 that rotates integrally with the second external teeth 52, the inner rotating element 71 that rotates integrally with the first outer teeth 51, and the first rotor 22 that rotates integrally with the third outer teeth 53. , And the case 5 provided with the internal teeth 54 are selectively connected. In other words, the element connected to the sun gear 41 as the first rotating element E <b> 1 can be switched by the dog clutch mechanism 50 from among the inner rotating element 71, the first rotating electrical machine 20, and the case 5.

  The vehicle drive device 1 includes a first electric travel mode, a continuously variable travel mode, and a parallel travel mode (first speed / first speed) according to the state of the dog clutch mechanism 50 and the states of the internal combustion engine EG and the rotary electric machines 20 and 30. 2nd speed) can be realized. In the present embodiment, the vehicle drive device 1 can further realize the second electric travel mode. In relation to the state of the dog clutch mechanism 50, the first electric travel mode or the parallel travel mode (first speed) can be realized in the first state, and the second electric travel mode or continuously variable speed travel mode can be achieved in the second state. This is feasible and the parallel running mode (second speed) can be realized in the third state. Hereinafter, each traveling mode will be described with reference to a velocity diagram showing an operation state of the differential gear device 40.

  In each speed diagram, the vertical axis represents the rotational speed of each rotating element. The upper side of “0” indicated on the vertical axis represents positive rotation (rotation speed is positive), and the lower side represents negative rotation (rotation speed is negative). Each of the plurality of vertical lines arranged in parallel represents each rotating element of the differential gear device 40. The interval between a plurality of vertical lines representing each rotating element is the gear ratio λ of the differential gear device 40 (the gear ratio of the sun gear 41 and the ring gear 43 = [the number of teeth of the sun gear 41] / [the number of teeth of the ring gear 43]. )). The rotational speeds of the first rotating electrical machine 20, the internal combustion engine EG, and the output member 46 are indicated by different symbols. Furthermore, the state in which the one-way clutches 70 and 75 perform the set rotation restriction is schematically shown using black triangle symbols, and a specific rotation element is fixed to the case 5. It is schematically shown using the symbol “x”.

  Further, the arrow with “T1” indicates the output torque of the first rotating electrical machine 20, the arrow with “Te” indicates the output torque of the internal combustion engine EG transmitted through the input member 10, and “ The arrow with “To” indicates the running resistance transmitted from the wheel W. An arrow with “T2” indicates the output torque of the second rotating electrical machine 30. The direction of these arrows represents the direction of the torque. Specifically, the upward arrow represents the torque in the positive direction, and the downward arrow represents the torque in the negative direction. Note that “torque in the positive direction” is torque that increases the rotational speed of each rotating element (changes in the positive direction), and “torque in the negative direction” decreases the rotational speed of each rotating element (in the negative direction). Torque in the direction to change

  The first electric travel mode is a travel mode in which only the driving force of the second rotating electrical machine 30 is transmitted to the wheels W. In the present embodiment, the first electric travel mode corresponds to the “electric travel mode”. The first electric travel mode is realized in the first state of the dog clutch mechanism 50 (see FIG. 2). Further, the first electric travel mode is realized in a driving state of the second rotating electrical machine 30 and a stopped state of the first rotating electrical machine 20 and the internal combustion engine EG. By setting the dog clutch mechanism 50 to the first state, the first rotating element E1 (the sun gear 41 in this example) and the inner rotating element 71 are connected. As a result, a state in which the rotation speed of the first rotation element E1 is lower than the rotation speed of the second rotation element E2 (the carrier 42 in this example) connected to the outer rotation element 72 is allowed.

  As shown in FIG. 5, in the first electric travel mode, the second rotating electrical machine 30 outputs a torque corresponding to the required driving force, and the output member 46 and the third rotating element E3 rotate at a rotational speed corresponding to the vehicle speed. . The internal combustion engine EG stops and the rotation speed of the second rotation element E2 becomes zero. At this time, the first rotating element E1 rotates in the negative direction. However, since the first rotating element E1 and the first rotating electrical machine 20 are separated in the first state of the dog clutch mechanism 50, the first rotating element E1 rotates negatively. The first rotating electrical machine 20 can also be stopped while allowing the above. That is, both the internal combustion engine EG and the first rotating electrical machine 20 can be completely stopped, in other words, both the accompanying rotation of the internal combustion engine EG and the accompanying rotating of the first rotating electrical machine 20 can be avoided.

  The second electric travel mode is a travel mode in which both the driving force of the first rotating electrical machine 20 and the driving force of the second rotating electrical machine 30 are transmitted to the wheels W. The second electric travel mode is realized in the second state of the dog clutch mechanism 50 (see FIG. 3). Further, the second electric travel mode is realized when the first rotary electric machine 20 and the second rotary electric machine 30 are driven and the internal combustion engine EG is stopped. By setting the dog clutch mechanism 50 to the second state, the first rotating element E1 (the sun gear 41 in this example) and the first rotating electrical machine 20 are connected.

  As shown in FIG. 6, in the second electric travel mode, the second rotating electrical machine 30 outputs a positive torque that partially satisfies the required driving force, and the output member 46 and the third rotating element E3 correspond to the vehicle speed. Rotates at the specified rotation speed. The first rotating electrical machine 20 outputs a torque in the negative direction while negatively rotating so as to compensate for the shortage with respect to the required driving force. At this time, the negative torque acting on the first rotating element E1 connected to the first rotating electrical machine 20 acts so as to reduce the rotational speed of the second rotating element E2, but the second one-way clutch 75 is The negative rotation of the input member 10 connected to the second rotation element E2 is restricted. Then, in the state where the reaction force is supported by the second one-way clutch 75, the direction of the output torque of the first rotating electrical machine 20 is reversed, and the positive torque is transmitted to the output member 46 and the wheels W.

  The continuously variable speed travel mode is a travel mode in which the rotational speed of the input member 10 is continuously variable and transmitted to the output member 46 and the wheels W. The continuously variable speed travel mode is realized in the second state of the dog clutch mechanism 50 (see FIG. 3). The continuously variable speed travel mode is realized in all drive states of the internal combustion engine EG, the first rotating electrical machine 20, and the second rotating electrical machine 30. By setting the dog clutch mechanism 50 to the second state, the first rotating element E1 (the sun gear 41 in this example) and the first rotating electrical machine 20 are connected.

  As shown in FIG. 7, in the continuously variable speed travel mode, the internal combustion engine EG outputs a torque in the positive direction while being controlled so as to conform to the optimum fuel consumption characteristics, and the input member 10 and the second rotating element E2 are connected to the internal combustion engine EG. It rotates at a rotation speed according to the rotation speed. The output member 46 and the third rotation element E3 rotate at a rotation speed corresponding to the vehicle speed. The first rotating electrical machine 20 outputs a negative torque to support the reaction force of the torque of the internal combustion engine EG. As a result, the differential gear device 40 distributes a part of the torque of the internal combustion engine EG to the first rotating electrical machine 20, and transmits the torque attenuated with respect to the torque of the internal combustion engine EG to the output member 46 and thus the wheels W. The differential gear device 40 functions as a power distribution device. By adjusting the rotational speed and output torque of the first rotating electrical machine 20, the ratio (speed ratio) of the rotational speed of the input member 10 to the rotational speed of the output member 46 can be changed steplessly. The differential gear device 40 also functions as a continuously variable transmission. The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force.

  The parallel traveling mode (first speed) is a traveling mode in which the rotational speed of the input member 10 is transmitted to the output member 46 and the wheels W while maintaining the same speed. In the present embodiment, the first speed in the parallel travel mode corresponds to the “first parallel travel mode”. The parallel travel mode (first speed) is realized in the first state of the dog clutch mechanism 50 (see FIG. 2). The parallel travel mode (first speed) is realized when the internal combustion engine EG and the second rotating electrical machine 30 are driven and the first rotating electrical machine 20 is stopped. By setting the dog clutch mechanism 50 to the first state, the first rotating element E1 (the sun gear 41 in this example) and the inner rotating element 71 are connected. As a result, a state in which the rotation speed of the first rotation element E1 is higher than the rotation speed of the second rotation element E2 (the carrier 42 in this example) connected to the outer rotation element 72 is restricted. That is, if it is assumed that the first one-way clutch 70 does not exist, the first rotation element E1 and the second rotation element E2 are integrated in a situation where the first rotation element E1 is higher than the second rotation element E2. It will be in a rotating state.

  As shown in FIG. 8, in the parallel travel mode (first speed), the internal combustion engine EG outputs a positive torque that partially satisfies the required driving force, and the input member 10 and the second rotary element E2 are the internal combustion engine. It rotates at a rotation speed corresponding to the rotation speed of the EG. The output member 46 and the third rotation element E3 rotate at a rotation speed corresponding to the vehicle speed. The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force. At this time, the torque in the positive direction of the internal combustion engine EG acting on the second rotation element E2 connected to the input member 10 acts to increase the rotation speed of the first rotation element E1, but the first one-way clutch 70 Restricts relative rotation in the positive direction of the first rotating element E1 with respect to the second rotating element E2. As a result, the first rotating element E1 and the second rotating element E2 are connected so as to rotate integrally, and the entire differential gear device 40 is directly connected, and the output member 46 remains at the same rotational speed of the input member 10. Is transmitted to. At that time, since the first rotating element E1 and the first rotating electrical machine 20 are separated in the first state of the dog clutch mechanism 50, the first rotating electrical machine 20 can be completely stopped, in other words, the first rotating electrical machine. Twenty rotations can be avoided.

  The parallel traveling mode (second speed) is a traveling mode in which the rotational speed of the input member 10 is changed in accordance with the gear ratio λ of the differential gear device 40 and transmitted to the output member 46 and the wheels W. In the present embodiment, the second speed in the parallel travel mode corresponds to the “second parallel travel mode”. The parallel travel mode (second speed) is realized in the third state of the dog clutch mechanism 50 (see FIG. 4). The parallel travel mode (second speed) is realized when the internal combustion engine EG and the second rotating electrical machine 30 are driven and the first rotating electrical machine 20 is stopped. By setting the dog clutch mechanism 50 to the third state, the first rotating element E1 (sun gear 41 in this example) is fixed to the case 5. In the present embodiment, the first rotating electrical machine 20 is also fixed to the case 5 in this state.

  As shown in FIG. 9, in the parallel travel mode (second speed), the first rotation element E1 is fixed to the case 5, and the output member 46 and the third rotation element E3 rotate at a rotation speed corresponding to the vehicle speed. In this state, the rotational speed of the internal combustion engine EG that outputs a positive torque is determined. A proportional relationship is established between the rotational speeds of the input member 10 and the second rotational element E2 connected to the internal combustion engine EG and the rotational speeds of the output member 46 and the third rotational element E3. Is increased (1 + λ) times and transmitted to the output member 46. The differential gear device 40 functions as a constant speed change device (in this example, a speed increasing device). The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force.

  Thus, in the vehicle drive device 1 of the present embodiment, both the accompanying rotation of the internal combustion engine EG and the accompanying rotation of the first rotating electrical machine 20 can be avoided when the first electric travel mode is realized. Further, when the direct drive stage (first speed stage) in the parallel traveling mode is realized, the accompanying rotation of the first rotating electrical machine 20 can be avoided. Therefore, energy loss can be suppressed to a low level, and the energy efficiency of the entire apparatus can be improved.

  As shown in FIG. 10, in the present embodiment, bidirectional mode transition is possible between the first electric travel mode and the second electric travel mode. In addition, bidirectional mode transition is possible between the second electric travel mode and the continuously variable travel mode. In addition, bi-directional mode transition is possible between the continuously variable mode and the parallel mode (first speed) and between the continuously variable mode and the parallel mode (second speed). It is. Furthermore, the mode shift from the parallel travel mode (first speed) to the first electric travel mode is possible.

  The mode transition from the first electric drive mode to the second electric drive mode can be performed by rotating the first rotating electrical machine 20 synchronously with the first rotating element E1 and then setting the dog clutch mechanism 50 to the second state. In the mode transition from the second electric traveling mode to the first electric traveling mode, the dog clutch mechanism 50 is set to the first state in a state where torque transmission between the first rotating electric machine 20 and the first rotating element E1 is reduced, and the first rotating electric machine This can be done by stopping 20.

  The mode transition from the second electric travel mode to the continuously variable speed travel mode can be performed by starting the internal combustion engine EG. The mode transition from the continuously variable travel mode to the second electric travel mode can be performed by stopping the internal combustion engine EG.

  The mode transition from the continuously variable speed travel mode to the parallel travel mode (first speed) is performed after adjusting the rotational speed of the first rotating electrical machine 20 and rotating the first rotating element E1 and the second rotating element E2 synchronously. This can be performed by setting the dog clutch mechanism 50 to the first state. The mode transition from the parallel travel mode (first speed) to the first electric travel mode can be performed by stopping the internal combustion engine EG. The mode transition from the parallel traveling mode (first speed) to the continuously variable traveling mode is performed by rotating the first rotating electrical machine 20 synchronously with the first rotating element E1 and then setting the dog clutch mechanism 50 to the second state. Can do.

  The mode transition from the continuously variable speed travel mode to the parallel travel mode (second speed) can be performed by setting the dog clutch mechanism 50 to the third state after the rotational speed of the first rotating electrical machine 20 is set to zero. In the mode transition from the parallel travel mode (second speed) to the continuously variable speed travel mode, the dog clutch mechanism 50 is set in the second state while the torque transmission between the sleeve member 59 and the internal teeth 54 is reduced, and the first rotating electrical machine 20 This can be done by driving.

  As described above, in the present embodiment, the second position P2 of the sleeve member 59 is located between the first position P1 and the third position P3, and the first position P1, the second position P2, and the third position P3. Are in the order listed. Therefore, the mode transition between the parallel traveling mode (first speed) realized in the first state of the dog clutch mechanism 50 and the parallel traveling mode (second speed) realized in the third state is always the second. It is performed through a continuously variable transmission mode realized in the state. Therefore, the rotation of the first external teeth 51, the second external teeth 52, and the third external teeth 53 of the dog clutch mechanism 50 is synchronized using the rotational speed control of the first rotating electrical machine 20 in the continuously variable speed travel mode. be able to. Therefore, the change of the state of the dog clutch mechanism 50 (change of the position of the sleeve member 59) can be performed smoothly, and the mode of the parallel travel mode (first speed) ⇔ continuously variable speed travel mode ⇔ parallel travel mode (second speed). Transition can be performed smoothly.

[Second Embodiment]
A second embodiment of the vehicle drive device will be described. In this embodiment, the connection aspect of the input member 10 and the output member 46 with respect to each rotation element of the differential gear apparatus 40 differs from 1st Embodiment. Accordingly, the direction of rotation restriction by the first one-way clutch 70, the operating state of the differential gear device 40 in each traveling mode, and the like are also different from those in the first embodiment. Hereinafter, the vehicle drive device 1 of the present embodiment will be described mainly with respect to differences from the first embodiment. Note that the points not particularly specified are the same as those in the first embodiment, and the same reference numerals are given and detailed description thereof is omitted.

  As shown in FIG. 11, in the present embodiment, the ring gear 43 as the third rotating element E3 that is one of the second rotating element E2 and the third rotating element E3 is connected to the input member 10. In the present embodiment, the ring gear 43 is the input rotation element Ei.

  The carrier 42 as the second rotating element E2 which is the other of the second rotating element E2 and the third rotating element E3 is connected to the output member 46. In the present embodiment, the carrier 42 is the output rotation element Eo. The carrier 42 is connected to an annular plate-like carrier connecting member 47. In this embodiment, the output member 46 is configured as an external gear output gear formed on the outer peripheral surface of the carrier connecting member 47. Further, the carrier 42 as the output rotation element Eo is connected to the outer rotation element 72 of the first one-way clutch 70.

  In the present embodiment, the first one-way clutch 70 allows a state in which the rotation speed of the inner rotation element 71 is higher than the rotation speed of the outer rotation element 72, and the inner rotation element 71 compared to the rotation speed of the outer rotation element 72. The rotation speed of the is controlled to be low. Accordingly, the first one-way clutch 70 allows a state in which the rotational speed of the element that rotates integrally with the second intermediate shaft 65 is higher than the rotational speed of the carrier 42 and the second intermediate shaft compared to the rotational speed of the carrier 42. The lowering of the rotation speed of the element that rotates integrally with 65 is restricted.

  The first electric travel mode is realized in the first state of the dog clutch mechanism 50. By setting the dog clutch mechanism 50 to the first state, the first rotating element E1 (the sun gear 41 in this example) and the inner rotating element 71 are connected. Accordingly, a state in which the rotation speed of the first rotation element E1 is higher than the rotation speed of the second rotation element E2 (the carrier 42 in this example) connected to the outer rotation element 72 is allowed. As shown in FIG. 12, in the first electric travel mode, the second rotating electrical machine 30 outputs a torque corresponding to the required driving force, and the output member 46 and the second rotating element E2 rotate at a rotational speed corresponding to the vehicle speed. . The internal combustion engine EG stops and the rotation speed of the third rotation element E3 becomes zero. At this time, the first rotating element E1 rotates at a higher speed than the second rotating element E2, but the first rotating element E1 and the first rotating electrical machine 20 are separated in the first state of the dog clutch mechanism 50. The first rotating electrical machine 20 can also be stopped while allowing high-speed rotation of the element E1. That is, both the internal combustion engine EG and the first rotating electrical machine 20 can be completely stopped, and both the accompanying rotation of the internal combustion engine EG and the accompanying rotating of the first rotating electrical machine 20 can be avoided.

  The second electric travel mode is realized in the second state of the dog clutch mechanism 50. By setting the dog clutch mechanism 50 to the second state, the first rotating element E1 (the sun gear 41 in this example) and the first rotating electrical machine 20 are connected. As shown in FIG. 13, in the second electric travel mode, the second rotating electrical machine 30 outputs a positive torque that partially satisfies the required driving force, and the output member 46 and the second rotating element E2 correspond to the vehicle speed. Rotates at the specified rotation speed. The first rotating electrical machine 20 outputs a torque in the positive direction while rotating forward so as to compensate for the shortage with respect to the required driving force. At this time, the torque in the positive direction acting on the first rotating element E1 connected to the first rotating electrical machine 20 acts so as to reduce the rotational speed of the third rotating element E3. The negative rotation of the input member 10 connected to the third rotation element E3 is restricted. Then, with the reaction force supported by the second one-way clutch 75, the output torque of the first rotating electrical machine 20 is transmitted to the output member 46 and thus to the wheel W.

  The continuously variable speed travel mode is realized in the second state of the dog clutch mechanism 50. By setting the dog clutch mechanism 50 to the second state, the first rotating element E1 (the sun gear 41 in this example) and the first rotating electrical machine 20 are connected. As shown in FIG. 14, in the continuously variable speed travel mode, the internal combustion engine EG outputs a torque in the positive direction, and the input member 10 and the third rotating element E3 rotate at a rotation speed corresponding to the rotation speed of the internal combustion engine EG. . The output member 46 and the second rotation element E2 rotate at a rotation speed corresponding to the vehicle speed. The first rotating electrical machine 20 outputs a torque in the positive direction to support the reaction force of the torque of the internal combustion engine EG. As a result, the differential gear device 40 synthesizes the torque of the internal combustion engine EG and the torque of the first rotating electrical machine 20, and transmits the torque amplified with respect to the torque of the internal combustion engine EG to the output member 46 and thus to the wheels W. The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force.

  The parallel traveling mode (first speed) is realized in the third state of the dog clutch mechanism 50. By setting the dog clutch mechanism 50 to the third state, the first rotating element E1 (the sun gear 41 in this example) and the first rotating electrical machine 20 are fixed to the case 5. As shown in FIG. 15, in the parallel travel mode (first speed), the first rotation element E1 is fixed to the case 5, and the output member 46 and the second rotation element E2 rotate at a rotation speed corresponding to the vehicle speed. In this state, the rotational speed of the internal combustion engine EG that outputs a positive torque is determined. A proportional relationship is established between the rotational speeds of the input member 10 and the third rotational element E3 connected to the internal combustion engine EG and the rotational speeds of the output member 46 and the second rotational element E2, and the rotational speed of the input member 10 is established. Is reduced to 1 / (1 + λ) times and transmitted to the output member 46. The differential gear device 40 functions as a speed reducer in this example. The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force. In the present embodiment, the parallel travel mode (first speed) corresponds to the “second parallel travel mode”.

  The parallel traveling mode (second speed) is realized in the first state of the dog clutch mechanism 50. By setting the dog clutch mechanism 50 to the first state, the first rotating element E1 (the sun gear 41 in this example) and the inner rotating element 71 are connected. As a result, a state in which the rotation speed of the first rotation element E1 is lower than the rotation speed of the second rotation element E2 (the carrier 42 in this example) connected to the outer rotation element 72 is restricted. As shown in FIG. 16, in the parallel travel mode (second speed), the internal combustion engine EG outputs a positive torque that partially satisfies the required driving force, and the input member 10 and the third rotating element E3 are the internal combustion engine. It rotates at a rotation speed corresponding to the rotation speed of the EG. The output member 46 and the second rotation element E2 rotate at a rotation speed corresponding to the vehicle speed. The second rotating electrical machine 30 outputs a torque in the positive direction so as to compensate for the shortage with respect to the required driving force. At this time, the torque in the positive direction of the internal combustion engine EG acting on the third rotating element E3 connected to the input member 10 acts to reduce the rotational speed of the first rotating element E1, but the first one-way clutch 70 Restricts the relative rotation of the first rotating element E1 in the negative direction with respect to the second rotating element E2. As a result, the first rotating element E1 and the second rotating element E2 are connected so as to rotate integrally, and the entire differential gear device 40 is directly connected, and the output member 46 remains at the same rotational speed of the input member 10. Is transmitted to. At this time, since the first rotating element E1 and the first rotating electrical machine 20 are separated in the first state of the dog clutch mechanism 50, the first rotating electrical machine 20 can be completely stopped, and the first rotating electrical machine 20 is accompanied. Around can be avoided. In the present embodiment, the parallel travel mode (second speed) corresponds to the “first parallel travel mode”.

  Thus, even in the vehicle drive device 1 of the present embodiment, both the accompanying rotation of the internal combustion engine EG and the accompanying rotation of the first rotating electrical machine 20 can be avoided when the first electric travel mode is realized. Further, when the direct drive stage (second speed stage) in the parallel traveling mode is realized, the accompanying rotation of the first rotating electrical machine 20 can be avoided. Therefore, energy loss can be suppressed to a low level, and the energy efficiency of the entire apparatus can be improved.

[Other Embodiments]
(1) In the above embodiments, the configuration in which the vehicle drive device 1 includes the second one-way clutch 75 has been described as an example. However, without being limited to such a configuration, for example, as shown in FIG. 17, the second one-way clutch 75 may not be provided in the vehicle drive device 1. In this case, the second electric travel mode is not realized, and the vehicle drive device 1 can realize only the first electric travel mode, the continuously variable speed travel mode, and the parallel travel mode (first speed / second speed). Become.

(2) In each of the above embodiments, the configuration in which the second position P2 of the sleeve member 59 is located between the first position P1 and the third position P3 has been described as an example. However, without being limited to such a configuration, for example, the first position P1 or the third position P3 may be configured to be located in the middle among the three positions.

(3) In the above embodiments, the configuration in which the outer rotating element 72 of the first one-way clutch 70 is connected to the second rotating element E2 has been described as an example. However, without being limited to such a configuration, for example, the outer rotating element 72 may be coupled to the third rotating element E3.

(4) In the above embodiments, the outer rotating element 72 of the first one-way clutch 70 is connected to the second rotating element E2, and the inner rotating element 71 is connected to the first rotating element E1 in the first state of the dog clutch mechanism 50. The configuration to be described has been described as an example. However, without being limited to such a configuration, for example, the inner rotating element 71 is connected to the second rotating element E2, and the outer rotating element 72 is connected to the first rotating element E1 in the first state of the dog clutch mechanism 50. Also good. In this case, the outer rotating element 72 corresponds to the “first member”, and the inner rotating element 71 corresponds to the “second member”.

(5) In each of the above embodiments, the example in which the differential gear device 40 is configured by a single pinion type planetary gear mechanism has been described. However, without being limited to such a configuration, for example, the differential gear device 40 may be configured by a double pinion type planetary gear mechanism.

  The configuration disclosed in each of the above-described embodiments (including each of the above-described embodiments and other embodiments; the same applies hereinafter) is applied in combination with the configuration disclosed in the other embodiments unless a contradiction arises. It is also possible to do.

  Regarding other configurations, it should be understood that the embodiments disclosed herein are merely examples in all respects. Accordingly, those skilled in the art can make various modifications as appropriate without departing from the spirit of the present disclosure.

[Outline of Embodiment]
In summary, the vehicle drive device according to the present disclosure preferably includes the following configurations.

[1]
A vehicle drive device (1) comprising:
An input member (10) drivingly connected to an internal combustion engine (EG);
An output member (46) drivingly connected to the wheel (W);
A first rotating electrical machine (20);
A second rotating electrical machine (30) drivingly connected to the output member (46);
A differential gear device (40) having three rotating elements which are a first rotating element (E1), a second rotating element (E2), and a third rotating element (E3) in the order of rotational speed;
A dog clutch mechanism (50) having a sleeve member (59) and capable of switching the axial position of the sleeve member (59) to a first position (P1), a second position (P2), and a third position (P3) When,
A one-way clutch (70) having a first member (71) and a second member (72) and restricting the direction of relative rotation between the first member (71) and the second member (72) in one direction. And comprising
The input member (10) is connected to one of the second rotating element (E2) and the third rotating element (E3);
The output member (46) is connected to the other of the second rotating element (E2) and the third rotating element (E3);
The second member (72) is connected to the second rotating element (E2) or the third rotating element (E3);
The dog clutch mechanism (50)
In the first state where the sleeve member (59) is located at the first position (P1), the first rotating element (E1) is coupled to the first member (71) and the first rotating electrical machine (20). Separated from
In the second state in which the sleeve member (59) is located at the second position (P2), the first rotating element (E1) is connected to the first rotating electrical machine (20) and the first member (71). And separating from the non-rotating member (5),
In the third state in which the sleeve member (59) is located at the third position (P3), the first rotating element (E1) is fixed to the non-rotating member (5).

According to this configuration, in the first state of the dog clutch mechanism, the traveling mode (one-motor electric traveling mode) in which only the driving force of the second rotating electrical machine is transmitted to the wheels and the rotational speed of the input member are output at the same speed. It is possible to realize the traveling mode (directly connected stage of the parallel traveling mode) transmitted to the member. In the second state, it is possible to realize a travel mode (stepless speed travel mode) in which the rotation speed of the input member is steplessly changed and transmitted to the output member. Further, in the third state, it is possible to realize a travel mode (parallel travel mode shift stage) in which the rotation speed of the input member is shifted according to the gear ratio of the differential gear device and transmitted to the output member.
In this case, by setting the connection relationship between the three-position switching type dog clutch mechanism, the three-element differential gear device, and the one-way clutch as described above, the direct-drive stage of the one-motor electric driving mode or the parallel driving mode can be set. When realized, the rotation of the first rotating electrical machine can be avoided. In other words, in the first state of the dog clutch mechanism, the first rotating element is separated from the first rotating electric machine, so even if the internal combustion engine is stopped during the electric running mode of one motor, the first rotating electric machine is not accompanied. . In addition, since the first member of the one-way clutch is connected to the first rotating element and the second member is connected to the second rotating element or the third rotating element, the first member is connected in the parallel travel mode in which the internal combustion engine is driven. The one-way clutch is locked according to the output of the internal combustion engine without the rotation of the rotating electric machine, and a direct coupling stage is formed. Therefore, in the vehicle drive device that can realize the direct drive stage of the electric drive mode and the parallel drive mode of one motor, energy loss can be suppressed to a low level and the energy efficiency can be improved.

[2]
The second position (P2) is located between the first position (P1) and the third position (P3).

  According to this configuration, the first state and the third state of the dog clutch mechanism transition through the second state. Therefore, the mode transition between the direct drive stage of the parallel running mode realized in the first state and the shift stage of the parallel running mode realized in the third state is always a continuously variable transmission realized in the second state. It will be done through the driving mode. Therefore, the rotation of the plurality of meshing teeth of the dog clutch mechanism can be synchronized using the rotational speed control of the first rotating electrical machine in the continuously variable speed travel mode. Therefore, the state of the dog clutch mechanism can be changed smoothly, and the mode transition between the direct connection stage and the shift stage in the parallel travel mode can be smoothly executed.

[3]
The input member (10) further includes a second one-way clutch (75) that allows the input member (10) to rotate forward and restricts negative rotation.

  According to this configuration, in the second state of the dog clutch mechanism, a traveling mode (two-motor electric traveling mode) in which both the driving force of the first rotating electrical machine and the driving force of the second rotating electrical machine are transmitted to the wheels is further realized. it can.

[4]
The differential gear device (40) includes a sun gear (41), a carrier (42), and a ring gear (43) as the three rotating elements,
The input member (10) is coupled to the carrier (42);
The output member (46) is connected to the ring gear (43);
The element connected to the sun gear (41) can be switched by the dog clutch mechanism (50) among the first member (71), the first rotating electrical machine (20), and the non-rotating member (5). It has become.

  According to this configuration, the first rotary electric machine is connected to the sun gear of the differential gear device, the input member is connected to the carrier, and the output member is connected to the ring gear. The entire apparatus can be made compact.

[5]
In the first state, in the electric traveling mode in which only the driving force of the second rotating electrical machine (30) is transmitted to the wheels (W), or the output speed while the rotational speed of the input member (10) remains the same. The first parallel travel mode transmitted to the member (46) is realized;
In the second state, a continuously variable speed travel mode is realized in which the rotational speed of the input member (10) is continuously variable and transmitted to the output member (46).
In the third state, the second parallel travel in which the rotational speed of the input member (10) is shifted according to the gear ratio (λ) of the differential gear device (40) and transmitted to the output member (46). The mode is realized.

  According to this configuration, the electric travel mode, the first parallel travel mode, the continuously variable speed travel mode, and the second parallel travel mode can be switched by switching the state of the dog clutch mechanism. By appropriately selecting each of these travel modes according to the travel state of the vehicle and the like, it is possible to achieve a suitable vehicle travel from the viewpoint of ensuring the fuel consumption rate and driving force.

  The vehicle drive device according to the present disclosure only needs to exhibit at least one of the effects described above.

  The technology according to the present disclosure can be used for a vehicle drive device for driving a vehicle, for example.

DESCRIPTION OF SYMBOLS 1 Vehicle drive device 5 Case (non-rotating member)
DESCRIPTION OF SYMBOLS 10 Input member 20 1st rotary electrical machine 30 2nd rotary electrical machine 40 Differential gear apparatus 41 Sun gear 42 Carrier 43 Ring gear 46 Output member 50 Dog clutch mechanism 51 First external tooth 52 Second external tooth 53 Third external tooth 54 Internal tooth 59 Sleeve Member 70 First one-way clutch (one-way clutch)
71 Inner rotating element (first member)
72 Outer rotating element (second member)
75 Second one-way clutch EG Internal combustion engine W Wheel E1 First rotation element E2 Second rotation element E3 Third rotation element P1 First position P2 Second position P3 Third position λ Gear ratio

Claims (5)

An input member drivingly connected to the internal combustion engine;
An output member drivingly connected to the wheel;
The first rotating electrical machine,
A second rotating electric machine drivingly connected to the output member;
A differential gear device having three rotating elements to be a first rotating element, a second rotating element, and a third rotating element in the order of rotational speed;
A dog clutch mechanism having a sleeve member and capable of switching the axial position of the sleeve member to a first position, a second position, and a third position;
A one-way clutch having a first member and a second member, and restricting the direction of relative rotation between the first member and the second member in one direction,
The input member is coupled to one of the second rotating element and the third rotating element;
The output member is coupled to the other of the second rotating element and the third rotating element;
The second member is connected to the second rotating element or the third rotating element;
The dog clutch mechanism is
In the first state where the sleeve member is located at the first position, the first rotating element is coupled to the first member and separated from the first rotating electrical machine,
In the second state where the sleeve member is located at the second position, the first rotating element is coupled to the first rotating electrical machine and separated from the first member and the non-rotating member,
A vehicle drive device that fixes the first rotating element to the non-rotating member in a third state in which the sleeve member is located at the third position.   The vehicle drive device according to claim 1, wherein the second position is located between the first position and the third position.   The vehicle drive device according to claim 1, further comprising a second one-way clutch that allows the input member to rotate positively and restricts negative rotation. The differential gear device has a sun gear, a carrier, and a ring gear as the three rotating elements,
The input member is coupled to the carrier;
The output member is coupled to the ring gear;
The element connected to the sun gear can be switched by the dog clutch mechanism among the first member, the first rotating electrical machine, and the non-rotating member. Vehicle drive system. In the first state, an electric travel mode in which only the driving force of the second rotating electrical machine is transmitted to the wheels, or a first parallel travel in which the rotational speed of the input member is transmitted to the output member while maintaining the same speed. Mode is realized,
In the second state, a continuously variable speed travel mode is realized in which the rotation speed of the input member is continuously variable and transmitted to the output member;
5. The second parallel travel mode in which the rotation speed of the input member is changed according to the gear ratio of the differential gear device and transmitted to the output member in the third state. The vehicle drive device according to claim 1.

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