JP2013129329A - Power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device that can control upsizing when installing a mechanism that separates a planetary gear mechanism and a driving wheel, and a parking lock mechanism.SOLUTION: The power transmission device includes: an output member 4 that has an output gear 23; a planetary gear mechanism 50 that has a rotation element 50r corresponding to the output member, a rotation element 50c corresponding to an engine, and a rotation element 50S corresponding to a rotating electric machine; and an engagement device 80. The engagement device has an engagement moving member 82 that can switch a first engagement state, a second engagement state, or an open state. The engagement moving member in a first engagement state engages a ring gear that is the rotation element corresponding to the output member and the output member, and allows the rotation of the ring gear and the output member. The engagement moving member in a second engagement state controls the rotation of the output member. The engagement moving member in the open state opens the ring gear and the output member and allows the rotation of the ring gear and the output member.

Description

  The present invention relates to a power transmission device.

  Conventionally, a power transmission device including a parking lock mechanism is known. For example, Patent Document 1 discloses a technique of a parking lock mechanism in which a parking gear is formed on the outer peripheral surface of a distribution output member of a planetary gear mechanism.

  In addition, a technique for separating the planetary gear mechanism from the drive wheel is known. For example, Patent Document 2 discloses a technology of a power output device, a hybrid vehicle, and a control method thereof that provide a clutch between a planetary gear and a motor, and that can be disconnected and connected.

JP 2011-183946 A JP 2000-209706 A

  It is desired that the enlargement of the power transmission device can be suppressed. For example, it is desirable to be able to suppress an increase in the size of the power transmission device when a mechanism for separating the planetary gear mechanism and the drive wheel and a parking lock mechanism are provided.

  The objective of this invention is providing the power transmission device which can suppress the enlargement at the time of providing the mechanism in which a planetary gear mechanism and a driving wheel are isolate | separated, and a parking lock mechanism.

  A power transmission device according to the present invention includes an output member having an output gear connected to a drive wheel, a rotating element corresponding to the output member, a rotating element corresponding to an engine, and a rotating element corresponding to a rotating electric machine. A gear mechanism, and an engagement device, the engagement device having an engagement moving member that can be switched to a first engagement state, a second engagement state, or a release state by being moved by an actuator. The engagement moving member in the first engagement state engages a ring gear, which is a rotating element corresponding to the output member, and the output member, and allows the ring gear and the output member to rotate. The engagement moving member in the second engagement state restricts the rotation of the output member, the engagement movement member in the released state releases the ring gear and the output member, and the ring Gear and Characterized in that it permits rotation of the output member.

  In the power transmission device, it is preferable that the engagement moving member in the second engagement state engages the ring gear and the output member and restricts rotation of the ring gear and the output member.

  In the power transmission device, the engagement moving member moves from the open state position in the engagement direction to the first engagement state, and further moves from the first engagement state position in the engagement direction. It is preferable that the second engagement state be established.

  A power transmission device according to the present invention includes an output member having an output gear connected to a drive wheel, a rotating element corresponding to the output member, a rotating element corresponding to the engine, and a rotating element corresponding to the rotating electrical machine. A gear mechanism and an engagement device are provided. The engagement device has an engagement moving member that can be switched to the first engagement state, the second engagement state, or the release state by being moved by the actuator.

  The engagement moving member in the first engagement state engages the ring gear, which is a rotation element corresponding to the output member, and the output member, and allows the ring gear and the output member to rotate. The engagement moving member in the second engagement state restricts the rotation of the output member. The engagement moving member in the opened state opens the ring gear and the output member, and allows the ring gear and the output member to rotate. According to the power transmission device according to the present invention, the engagement device also serves as a mechanism for separating the planetary gear mechanism and the drive wheel and a parking lock mechanism, thereby achieving an effect of suppressing an increase in size.

FIG. 1 is a cross-sectional view illustrating a main part of a power transmission device according to an embodiment. FIG. 2 is a skeleton diagram showing a main part of the vehicle according to the embodiment when the engine / HV travels. FIG. 3 is a skeleton diagram showing a main part during EV / regenerative running of the vehicle according to the embodiment.

  Hereinafter, a power transmission device according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
The embodiment will be described with reference to FIGS. 1 to 3. The present embodiment relates to a power transmission device. FIG. 1 is a cross-sectional view showing a main part of a power transmission device according to an embodiment of the present invention, FIG. 2 is a skeleton diagram showing the main part of the vehicle according to the embodiment during engine / HV traveling, and FIG. It is a skeleton figure which shows the principal part at the time of EV / regenerative driving of the vehicle which concerns on a form.

  The power transmission device 20 of the present embodiment shown in FIG. 1 transmits power generated by a traveling power source. The power transmission device 20 is mounted on the vehicle 1 and applied to the drive device 2 as shown in FIGS. The drive device 2 drives and propels the drive wheels 30 of the vehicle 1. The drive device 2 includes an engine 10, a first rotary electric machine MG1, and a second rotary electric machine MG2, and is a so-called hybrid type drive device. The vehicle 1 is a hybrid vehicle that operates the internal combustion engine as efficiently as possible while compensating for excess or deficiency of the driving force or engine braking force with an electric motor or motor generator, and further regenerating energy during deceleration. It can be carried out.

  Drive device 2 includes power transmission device 20, drive wheels 30, and ECU 40 in addition to engine 10 and rotating electrical machines MG1, MG2. The engine 10 converts the combustion energy of the fuel into a rotary motion of the rotary shaft and outputs it.

  The first rotating electrical machine MG1 and the second rotating electrical machine MG2 are connected to a battery via an inverter. The first rotating electrical machine MG1 and the second rotating electrical machine MG2 can convert the electric power supplied from the battery into mechanical power and output it, and are driven by the input power to convert the mechanical power into electric power. Can be converted. The electric power generated by the first rotating electrical machine MG1 and the second rotating electrical machine MG2 can be stored in the battery. As the first rotating electrical machine MG1 and the second rotating electrical machine MG2, for example, an AC synchronous motor generator can be used.

  The power transmission device 20 connects the engine 10, the first rotating electrical machine MG <b> 1, the second rotating electrical machine MG <b> 2, and the drive wheel 30 to each other, and transmits input power to the drive wheel 30 to rotate the drive wheel 30. Can be driven. The power transmission device 20 includes an output member 4 (see FIG. 1), a first rotating electrical machine MG1, a second rotating electrical machine MG2, a planetary gear mechanism 50, a speed reduction mechanism 60, a differential mechanism 70, and an engagement device 80. ing.

  The ECU 40 is an electronic control unit having a computer. The ECU 40 has a function as a control device that controls each part of the vehicle. The ECU 40 of the present embodiment is connected to the engine 10, the first rotating electrical machine MG1, the second rotating electrical machine MG2, and the engaging device 80, and controls the engine 10, each rotating electrical machine MG1, MG2, and the engaging device 80. Can do. The ECU 40 can use the engine 10 and the rotating electrical machines MG1, MG2 together or selectively as a prime mover by controlling the drive device 2.

  The first rotating electrical machine MG1 is mainly used as a generator that generates power upon receiving the output of the engine 10, and the second rotating electrical machine MG2 is mainly used as an electric motor that outputs driving power. A rotating shaft 21 is connected to the rotor of the first rotating electrical machine MG1. The rotation axis C <b> 1 of the rotation shaft 21 coincides with the rotation axis of the input shaft 11. The rotating shaft 22 is connected to the rotor of the second rotating electrical machine MG2. The rotation shaft 22 can rotate around the rotation axis C2. The rotation axis C1 and the rotation axis C2 are parallel.

  The planetary gear mechanism 50 is a differential mechanism that can divide the mechanical power output from the engine 10 into the first rotating electrical machine MG1 side and the drive wheel 30 side. The planetary gear mechanism 50 includes a sun gear 50s, a pinion gear 50p, a ring gear 50r, and a carrier 50c. The sun gear 50s is disposed so as to be rotatable coaxially with the rotation axis C1. The ring gear 50r is rotatably arranged coaxially with the sun gear 50s. The pinion gear 50p is disposed between the sun gear 50s and the ring gear 50r, and meshes with the sun gear 50s and the ring gear 50r, respectively.

  The carrier 50 c is arranged coaxially with the input shaft 11 and is connected to the input shaft 11 and rotates integrally with the input shaft 11. The carrier 50 c is a rotating element corresponding to the engine 10 and is connected to the engine 10 via the input shaft 11. The pinion gear 50p is rotatably supported by the carrier 50c. Accordingly, the pinion gear 50p can rotate (spin) around the rotation axis of the pinion gear 50p, and can rotate (revolve) around the rotation axis C1 of the input shaft 11 integrally with the carrier 50c. is there.

  The rotation shaft 21 of the first rotating electrical machine MG1 is connected to the sun gear 50s. In other words, the sun gear 50s is a rotating element corresponding to the first rotating electrical machine MG1. The first rotating electrical machine MG1 is opposed to the engine 10 in the axial direction with the planetary gear mechanism 50 interposed therebetween.

  The ring gear 50r is connected to a later-described counter drive gear 23 via an engagement device 80.

  In the present specification, unless otherwise specified, the “axial direction” indicates the direction of the rotational axis C1 of the input shaft 11, and the “radial direction” is a radius centered on the rotational axis C1 and orthogonal to the rotational axis C1. The “circumferential direction” indicates a rotation direction with the rotation axis C1 as the rotation center.

  The speed reduction mechanism 60 integrates the mechanical power transmitted from the planetary gear mechanism 50 and the mechanical power transmitted from the rotary shaft 22, and decelerates the integrated mechanical power to increase the torque. The speed reduction mechanism 60 includes a counter shaft 61, a counter driven gear 62 and a drive pinion gear 63. The counter shaft 61 is a rotation shaft that can rotate around a rotation axis C3 parallel to the rotation axes C1 and C2. The counter driven gear 62 meshes with the counter drive gear 23. The drive pinion gear 63 is connected to the counter driven gear 62 via the counter shaft 61, and rotates integrally with the counter driven gear 62.

  A reduction gear 24 is connected to the rotating shaft 22 of the second rotating electrical machine MG2. The reduction gear 24 meshes with the counter driven gear 62. The power transmitted from the counter drive gear 23 and the power transmitted from the reduction gear 24 are combined in the counter driven gear 62 and output from the drive pinion gear 63.

  The differential mechanism 70 distributes the mechanical power transmitted from the speed reduction mechanism 60 to the left and right drive shafts 71 and outputs it. The differential mechanism 70 includes a diff ring gear 72. The diff ring gear 72 meshes with the drive pinion gear 63. Drive wheels 30 are connected to the left and right drive shafts 71, respectively.

  The vehicle 1 can selectively execute EV traveling or HV traveling. EV travel is a travel mode in which the vehicle 1 travels using at least one of the first rotating electrical machine MG1 and the second rotating electrical machine MG2 as a power source regardless of the power of the engine 10. The vehicle 1 may be configured to be able to travel using the first rotating electrical machine MG1 as a power source in the EV traveling mode. For example, the first rotating electrical machine MG1 may be allowed to travel using a power source as a clutch capable of regulating the rotation of the carrier 50c or a one-way clutch regulating the negative rotation of the carrier 50c. Here, the positive direction in the rotation of each rotation element of the planetary gear mechanism 50 is the rotation direction of the ring gear 50r and the carrier 50c when the vehicle 1 travels forward.

  Further, the ECU 40 can cause the vehicle 1 to travel in the HV traveling mode based on the driving state of the vehicle 1 or the like. The HV travel mode is a travel mode in which the vehicle 1 travels using at least the engine 10 as a power source. In the HV traveling mode, engine traveling for traveling the vehicle 1 with the power of the engine 10 or HV traveling for traveling the vehicle 1 with the power of the engine 10 and the power of the second rotary electric machine MG2 can be performed. The first rotating electrical machine MG1 outputs a negative torque to the engine 10 that rotates positively by outputting a positive torque and receives a reaction force to output the engine torque from the ring gear 50r as a driving force of the vehicle 1. be able to.

  As shown in FIG. 1, the ring gear 50 r is an internal gear arranged on the inner periphery of the rotating member 3. The ring gear 50 r is connected to the output member 4 via the engagement device 80 and is a rotating element corresponding to the output member 4. The rotating member 3 has a cylindrical shape and is arranged coaxially with the rotation axis C1.

  The rotating member 3 is rotatably supported by the case 5 via bearings 31 and 32. The case 5 is a case that houses the power transmission device 20, and has a planetary gear mechanism 50, an engagement device 80, an output member 4 described later, and the like. The bearings 31 and 32 can be ball bearings, for example. The bearings 31 and 32 are disposed on the radially inner side of the rotating member 3. The inner rings of the bearings 31 and 32 are fitted to the case 5, and the outer rings are fitted to the inner periphery of the rotating member 3. The bearing 31 supports the end of the rotating member 3 on the first rotating electrical machine side in the axial direction. The bearing 32 supports the engine-side end of the rotating member 3 in the axial direction. Further, the bearing 31 and the bearing 32 face each other in the axial direction with the planetary gear mechanism 50 interposed therebetween.

  The output member 4 is disposed on the radially outer side of the rotating member 3. The output member 4 has a cylindrical shape. The axial length of the output member 4 is shorter than the axial length of the rotating member 3. The inner peripheral surface of the output member 4 and the outer peripheral surface of the rotating member 3 are opposed to each other in the radial direction with a predetermined gap. Bearings 33 and 34 are interposed between the inner peripheral surface of the output member 4 and the outer peripheral surface of the rotating member 3. The bearings 33 and 34 are, for example, needle bearings, and connect the output member 4 and the rotating member 3 so as to be relatively rotatable. The output member 4 is supported by the rotating member 3 via bearings 33 and 34 and is rotatable relative to the rotating member 3.

  The rotating member 3 has a small diameter portion 35 disposed on the engine side in the axial direction and a large diameter portion 36 disposed on the first rotating electrical machine side in the axial direction with respect to the small diameter portion 35. The outer diameter of the large diameter portion 36 is larger than the outer diameter of the small diameter portion 35. The output member 4 is disposed in the small diameter portion 35 of the rotating member 3. The rotating member 3 has a step surface 37 corresponding to a difference in outer diameter between the small diameter portion 35 and the large diameter portion 36. The step surface 37 faces the output member 4 in the axial direction and restricts the movement of the output member 4 in the axial direction. The step surface 37 restricts the axial movement of the output member 4 toward the first rotating electrical machine side. Further, the axial movement of the output member 4 toward the engine side is regulated by a washer 38 and a snap ring 39.

  The output member 4 has an external counter drive gear 23. The counter drive gear 23 is an output gear connected to the drive wheels 30. Specifically, as shown in FIG. 2, the counter drive gear 23 is connected to the drive wheel 30 via a counter driven gear 62, a drive pinion gear 63, a differential mechanism 70 and a drive shaft 71. The counter drive gear 23 is disposed at the end of the output member 4 on the engine side in the axial direction. The counter drive gear 23 is opposed to the bearing 32 in the radial direction. That is, the bearing 32 is located inward of the counter drive gear 23 in the radial direction. Further, at least a part of the counter drive gear 23 is located on the first rotating electrical machine side with respect to the bearing 32, in other words, between the bearing 31 and the bearing 32.

  The engagement device 80 includes a clutch hub 81, a clutch sleeve 82, dog teeth 83, a rotation side parking dog 84, a fixed side parking dog 85, and an actuator (not shown). The engaging device 80 has a function as a clutch device that engages the rotating member 3 and the output member 4 and a function as a parking lock mechanism that restricts rotation of the rotating member 3 and the output member 4.

  The clutch hub 81 is disposed on the outer periphery of the large diameter portion 36 of the rotating member 3. The clutch hub 81 is fixed so as not to rotate relative to the rotating member 3, and is formed integrally with the rotating member 3, for example. The clutch hub 81 has dog teeth 81a which are external teeth protruding outward in the radial direction. The direction in which the tooth trace of the dog tooth 81a extends is the axial direction.

  The dog teeth 83 are disposed on the outer periphery of the output member 4. The dog teeth 83 are fixed so as not to rotate relative to the output member 4, and are formed integrally with the output member 4, for example. The dog teeth 83 are arranged closer to the first rotating electrical machine side in the axial direction than the counter drive gear 23. The dog teeth 83 are external teeth protruding outward in the radial direction, and the direction in which the tooth trace extends is the axial direction. The dog teeth 83 of the output member 4 and the dog teeth 81a of the clutch hub 81 have the same radial position from the rotation axis C1, and their outer peripheral surfaces are on the same cylindrical surface. The dog teeth 83 and the dog teeth 81a are adjacent to each other in the axial direction and face each other.

  The clutch sleeve 82 is disposed on the outer side in the radial direction with respect to the clutch hub 81. The clutch sleeve 82 is an engagement moving member that moves in the axial direction when an axial driving force is applied by an actuator. The clutch sleeve 82 has a cylindrical shape and faces the rotating member 3 in the radial direction. The clutch sleeve 82 has dog teeth 82a as internal teeth. The dog teeth 82a are disposed on the inner periphery of the clutch sleeve 82 and protrude toward the inside in the radial direction. The direction in which the tooth traces of the dog teeth 82a extend is the axial direction. The dog teeth 82a of the clutch sleeve 82 and the dog teeth 81a of the clutch hub 81 are engaged with each other.

  The clutch sleeve 82 is provided with a rotation side parking dog 84. The rotation side parking dog 84 is disposed on the end surface of the clutch sleeve 82 on the engine side in the axial direction. The rotation side parking dog 84 is a dog tooth protruding toward the engine side in the axial direction with respect to the clutch sleeve 82. The rotation side parking dog 84 is arranged on the outer side in the radial direction than the dog teeth 81a and 83. Further, the rotation side parking dog 84 projects toward the engine side in the axial direction with respect to the dog teeth 82 a of the clutch sleeve 82. The direction in which the tooth trace of the rotation side parking dog 84 extends is the radial direction.

  The case 5 is provided with a fixed parking dog 85. The fixed side parking dog 85 is a dog tooth corresponding to the rotation side parking dog 84. The stationary parking dog 85 is disposed on the mounting portion 51 that constitutes a part of the case 5. The mounting portion 51 protrudes inward in the radial direction from the outer shell portion of the case 5 toward the output member 4, and is fixed so as not to be rotatable relative to the outer shell portion of the case 5 at least around the rotation axis C <b> 1. Has been. Since the outer shell portion of the case 5 is fixed to the vehicle body of the vehicle 1, the attachment portion 51 is fixed to the vehicle body. The mounting portion 51 is preferably fixed so as not to move relative to the outer shell portion of the case 5 in any direction. The stationary parking dog 85 is disposed at the radially inner end of the mounting portion 51 and protrudes toward the first rotating electrical machine in the axial direction. The direction in which the tooth trace of the fixed parking dog 85 extends is the radial direction. The stationary parking dog 85 and the rotating parking dog 84 face each other in the axial direction.

  The clutch sleeve 82 can be switched to the first engaged state, the second engaged state, or the released state by being moved by the actuator. The clutch sleeve 82 may be switchable to another state. In other words, the clutch sleeve 82 can be switched at least to the first engaged state, the second engaged state, or the released state. The actuator can move the clutch sleeve 82 in the axial direction by electromagnetic force, spring force, or the like, and a known actuator applicable to a dog clutch or the like can be used. As an example, the actuator can be an electromagnetic solenoid.

(First engagement state)
In the first engagement state, the clutch sleeve 82 engages the ring gear 50r and the output member 4 and allows the ring gear 50r and the output member 4 to rotate. Specifically, the position of the clutch sleeve 82 in the first engagement state in the axial direction is such that the dog teeth 82a engage with the dog teeth 81a of the clutch hub 81 and the dog teeth 83 of the output member 4, respectively, and In this position, the dog 84 is not engaged with the fixed parking dog 85. In the first engagement state, the dog teeth 82 a of the clutch sleeve 82 connect the dog teeth 81 a of the clutch hub 81 and the dog teeth 83 of the output member 4 to restrict relative rotation between the dog teeth 81 a and the dog teeth 83. That is, the clutch sleeve 82 in the first engagement state couples the ring gear 50r and the output member 4 to a state in which power can be transmitted to each other.

  Further, in the first engagement state, the rotation side parking dog 84 and the fixed side parking dog 85 are not engaged, and therefore the rotation member 3 and the output member 4 are allowed to rotate. In the first engagement state, torque output from the engine 10 is transmitted from the counter drive gear 23 toward the drive wheels 30 via the planetary gear mechanism 50, the rotating member 3, the clutch sleeve 82, and the output member 4. Can do.

(Second engagement state)
In the second engagement state, the clutch sleeve 82 engages the ring gear 50r and the output member 4, and restricts the rotation of the ring gear 50r and the output member 4. Specifically, the position of the clutch sleeve 82 in the second engagement state in the axial direction is such that the dog teeth 82a engage with the dog teeth 81a of the clutch hub 81 and the dog teeth 83 of the output member 4, respectively, and This is a position where the dog 84 engages with the fixed parking dog 85. In the clutch sleeve 82, the position in the second engagement state is the position closest to the engine in the movable range.

  In the second engagement state, the dog teeth 82 a of the clutch sleeve 82 connect the dog teeth 81 a of the clutch hub 81 and the dog teeth 83 of the output member 4 to restrict relative rotation between the dog teeth 81 a and the dog teeth 83. The rotation of the clutch sleeve 82 is restricted by the rotation-side parking dog 84 engaging the fixed-side parking dog 85. In other words, the clutch sleeve 82 in the second engagement state connects the case 5 to the dog teeth 81a and the dog teeth 83 so as not to be relatively rotatable. Thereby, rotation of the rotation member 3 and the output member 4 is controlled.

  In the second engagement state, a parking lock state is realized, and the rotation of the counter drive gear 23 and the drive wheel 30 is restricted.

(Open state)
In the opened state, the clutch sleeve 82 opens the ring gear 50r and the output member 4, and allows the ring gear 50r and the output member 4 to rotate. Specifically, the axial position of the opened clutch sleeve 82 is such that the dog teeth 82a are engaged with the dog teeth 81a of the clutch hub 81 and the dog teeth 83 of the output member 4 are not engaged. This is a position where the parking dog 84 is not engaged with the fixed parking dog 85. In the clutch sleeve 82, the opened position is the position closest to the first rotating electrical machine in the movable range.

  Since the opened clutch sleeve 82 engages with the dog teeth 81a of the rotating member 3 and does not engage with the dog teeth 83 of the output member 4, the ring gear 50r and the output member 4 are released, and the ring gear is released. Relative rotation between 50r and the output member 4 is allowed. Further, in the opened state, the rotation side parking dog 84 does not engage with the fixed side parking dog 85, so that the rotation of the clutch sleeve 82 is not restricted. Therefore, the opened clutch sleeve 82 allows the ring gear 50r and the output member 4 to rotate.

  In this way, the clutch sleeve 82 is in the released state at the position closest to the first rotating electrical machine in the axial direction in the movable range, is in the second engaged state at the position closest to the engine, and is in the released state and the second engaged state. The first engagement state is established at a position between the two. In other words, the clutch sleeve 82 is switched from the open state to the first engagement state by moving from the open state position toward the axial engine side, and further from the first engagement state position to the axial engine side. Is moved from the first engagement state to the second engagement state. That is, in the clutch sleeve 82, the moving direction toward the engine side in the axial direction is the engagement direction. On the other hand, in the clutch sleeve 82, the moving direction toward the first rotating electrical machine in the axial direction is the release direction.

  In the following description, the position of the clutch sleeve 82 in the axial direction, the position in the first engagement state is also referred to as “first engagement position”, and the position in the second engagement state is referred to as “second engagement position”. ”And the open position is also referred to as“ open position ”. The open position, the first engagement position, and the second engagement position can be the positions of the reference portions of the dog teeth 82a in the respective states. The open position, the first engagement position, and the second engagement position may be defined as regions having a predetermined width in the axial direction.

  The actuator of the engagement device 80 moves the clutch sleeve 82 to the first engagement position in the engagement direction to engage the rotating member 3 and the output member 4, and moves the clutch sleeve 82 in the engagement direction. It is possible to perform the second control in which the rotary member 3, the output member 4, and the case 5 are engaged by moving to the second engagement position.

  The ECU 40 controls the engagement device 80 to the first engagement state as shown in FIG. 2 during the engine running and the HV running. In this case, the power transmission device 20 divides the mechanical power output from the engine 10 through the input shaft 11 to the carrier 50c into the sun gear 50s and the ring gear 50r from the pinion gear 50p of the planetary gear mechanism 50. The power transmission device 20 transmits, for example, mechanical power from the engine 10 transmitted from the ring gear 50r to the counter drive gear 23 through the counter driven gear 62, the differential mechanism 70, the drive shaft 71, and the like when the engine is running. This is transmitted to the drive wheel 30. In addition, the power transmission device 20 includes, for example, mechanical power from the engine 10 transmitted from the ring gear 50r to the counter drive gear 23 during HV traveling, and the second rotating electrical machine MG2 transmitted from the rotary shaft 22 to the reduction gear 24. Are integrated by a counter driven gear 62 and transmitted to the drive wheel 30 via the differential mechanism 70, the drive shaft 71, and the like.

  On the other hand, as shown in FIG. 3, the ECU 40 controls the engagement device 80 to be in an open state during EV travel and during regenerative travel in which regenerative braking is performed by the second rotating electrical machine MG2 during braking of the vehicle 1. The power transmission device 20, for example, transmits mechanical power from the second rotating electrical machine MG2 transmitted from the rotary shaft 22 to the reduction gear 24 during EV travel via the counter driven gear 62, the differential mechanism 70, the drive shaft 71, and the like. This is transmitted to the drive wheel 30. For example, during regenerative travel, the power transmission device 20 transmits the power from the drive wheel 30 side to the reduction gear 24 via the drive shaft 71, the differential mechanism 70, the counter driven gear 62, and the like, whereby the second rotation. Electric machine MG2 generates electricity by regeneration.

  When the engagement device 80 is released during EV traveling or regenerative braking, the rotating member 3 and the output member 4 are disconnected. Thereby, the planetary gear mechanism 50, the first rotating electrical machine MG1, and the like are prevented from being rotated by the rotation of the counter drive gear 23, and drag loss is reduced.

  The ECU 40 controls the engagement device 80 to the second engagement state when setting the parking lock state. For example, the ECU 40 sets the engagement device 80 to the second engagement state when the shift position is in the P (parking) range, and moves the engagement device 80 to the first engagement when the shift position is shifted from the P range to another range. Either the combined state or the open state.

  In the power transmission device 20 of the present embodiment, the control of the clutch that engages the rotating member 3 and the output member 4 and the control of the parking lock mechanism that restricts the rotation of the output member 4 can be performed by one actuator. it can. Further, one clutch sleeve 82 serves as an engagement moving member of the clutch that engages the rotating member 3 and the output member 4 and an engagement moving member of the parking lock mechanism. Therefore, a dedicated parking lock mechanism (a system in which the parking gear and the dedicated parking pole mesh with each other) is not required, and the power transmission device 20 can be reduced in the radial direction and the axial direction.

  The engaging device 80 can be switched to the first engaged state, the second engaged state, or the released state by moving the clutch sleeve 82 in the axial direction and adjusting the position in the axial direction. Thus, since the moving direction of the clutch sleeve 82 is limited to only the axial direction, it is possible to reduce the space secured as the movable range and to simplify the configuration of the actuator.

  In the engaging device 80 of the present embodiment, the clutch engaging portion that engages the dog teeth 81 a of the rotating member 3 and the dog teeth 83 of the output member 4 as a clutch is disposed on the inner periphery of the clutch sleeve 82. Dog teeth 82a. On the other hand, the parking engaging portion that realizes the parking lock state by engaging with the fixed parking dog 85 is the rotating parking dog 84 disposed on the side surface of the clutch sleeve 82. Thus, the clutch engagement portion and the parking engagement portion are arranged on different surfaces of the clutch sleeve 82, so that the clutch sleeve 82 can be switched between the first engagement state and the second engagement state. The stroke amount can be suppressed. In other words, the required movable range in the axial direction of the clutch sleeve 82 can be suppressed.

  In the present embodiment, the engaging device 80 is a meshing clutch device, but the present invention is not limited to this, and other known clutch devices or the like are used as the engaging device 80. Also good.

[First Modification of Embodiment]
In the above embodiment, in the second engagement state, the clutch sleeve 82 connects the rotation member 3 and the output member 4 and the rotation side parking dog 84 engages with the fixed side parking dog 85. In the second engagement state, the clutch sleeve 82 may open the rotating member 3 and the output member 4. For example, when the parking lock state is established in the second engagement state, the dog teeth 82 a of the clutch sleeve 82 are engaged with the dog teeth 83 of the output member 4 and are not engaged with the dog teeth 81 a of the clutch hub 81. It may be.

[Second Modification of Embodiment]
In the above embodiment, the clutch sleeve 82 is in an open state when it is at one end of the movable range, is in a second engaged state when it is at the other end of the movable range, and is in a first engaged state when it is in the middle of the movable range. However, the correspondence between the position of the movable range and each state is not limited to this. For example, the engagement device 80 is configured to be in a first engagement state when the clutch sleeve 82 is at one end of the movable range, a second engagement state when the clutch sleeve 82 is at the other end, and an open state when in the middle. May be.

[Third Modification of Embodiment]
In addition to the open state of the above embodiment (hereinafter referred to as “first open state”), a second open state may be provided. The second open state differs from the first open state in that the rotation of the rotating member 3 is restricted. That is, in the second open state, the rotation of the rotating member 3 is restricted and the relative rotation between the rotating member 3 and the output member 4 is allowed. In the second opened state, the rotation side parking dog 84 and the fixed side parking dog 85 are not engaged and opened.

  As a means for realizing the second open state, for example, a method of providing rotation restriction dog teeth for restricting the rotation of the clutch sleeve 82 by engaging with each other in the clutch sleeve 82 and the case 5, similar to the parking dogs 84 and 85. Can be mentioned. When the clutch sleeve 82 is moved from the open position to the first rotating electrical machine side, the rotation restriction dog teeth of the clutch sleeve 82 and the rotation restriction dog teeth of the case 5 may be engaged. It is also possible to provide a second open state instead of the first open state.

  The contents disclosed in the above embodiments and modifications can be implemented in appropriate combination.

DESCRIPTION OF SYMBOLS 1 Vehicle 4 Output member 5 Case 10 Engine 20 Power transmission device 23 Counter drive gear (output gear)
30 Drive wheels 40 ECU
50 planetary gear mechanism 50r ring gear 80 engagement device 81 clutch hub 82 clutch sleeve 84 rotating side parking dog 85 fixed side parking dog MG1 first rotating electric machine (rotating electric machine)
MG2 Second rotating electrical machine

Claims (3)

An output member having an output gear connected to the drive wheels;
A planetary gear mechanism having a rotating element corresponding to the output member, a rotating element corresponding to the engine, and a rotating element corresponding to the rotating electrical machine;
An engagement device;
With
The engagement device has an engagement moving member that can be switched to a first engagement state, a second engagement state, or an open state by being moved by an actuator;
The engagement moving member in the first engagement state engages a ring gear that is a rotating element corresponding to the output member and the output member, and allows the ring gear and the output member to rotate,
The engagement moving member in the second engagement state restricts rotation of the output member;
The power transmission apparatus, wherein the engagement moving member in the released state opens the ring gear and the output member and allows the ring gear and the output member to rotate. The power transmission device according to claim 1, wherein the engagement moving member in the second engagement state engages the ring gear and the output member and restricts rotation of the ring gear and the output member. The engagement moving member moves from the position in the released state in the engagement direction to the first engagement state, and further moves in the engagement direction from the position in the first engagement state to move to the second engagement. The power transmission device according to claim 1, wherein the power transmission device is in a combined state.

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