JP2010270898A - Clutch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch device capable of restraining a pair of engaging member from still becoming an engaging state. <P>SOLUTION: This clutch device includes a pair of mutually engageable meshing type engaging members 36 and 102 arranged in a power transmission device of a hybrid vehicle having an internal combustion engine, and a driving means for engaging or releasing the pair of engaging members, wherein the driving means releases the pair of engaging members when at least the vehicle is a stopping state. The pair of engaging members are connected to a switching means which connects a rotary shaft of the internal combustion engine and a driving shaft of the vehicle in the power transmission device and which switches a first state of regulating a variation in the rotational ratio of both shafts and a second state of allowing the variation in the rotational ratio, switch the power transmission device to the first state by the switching means by engaging and switch the power transmission device to the second state by the switching means by releasing, and have a releasing means 120 which is different from the driving means and releases the pair of engaging members by interlocking with the movement to a parking position of an operation member operated by a driver. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a clutch device, and in particular, includes a pair of meshing engagement members that are disposed in a power transmission device of a hybrid vehicle and can be engaged with each other, and a drive unit that engages or releases the pair of engagement members. The present invention relates to a clutch device having the same.

  2. Description of the Related Art Conventionally, a clutch device having a pair of meshing engagement members that can be engaged with each other and a driving unit that engages or releases the pair of engagement members is known. For example, Patent Document 1 discloses a technology for connecting a motor and a power transmission mechanism via a dog clutch as a motor disconnection unit in a vehicle drive device that transmits a driving force of the motor to a drive wheel via a power transmission mechanism. It is disclosed.

JP 2005-106266 A

  When the pair of engaging members are controlled to the engaged state or the released state based on the driving state of the vehicle, the pair of engaging members can be reliably released in the driving state in which the pair of engaging members should be released. Is desirable. For example, when the power transmission device connects a rotation shaft of an internal combustion engine and a drive shaft of a hybrid vehicle by engaging a pair of engagement members, the pair of engagement members are not released and are engaged. If they remain together, there is a possibility that the startability of the internal combustion engine will be reduced.

  In the clutch device, when a temporary inclination, a catch, or the like occurs, the pair of engaging members may be difficult to release. Thus, even if it becomes a case where a pair of engaging member becomes a state which is hard to release, it is desired that it can suppress that a pair of engaging member remains engaged.

  An object of the present invention is provided in a power transmission device of a hybrid vehicle, and has a pair of meshing engagement members that can be engaged with each other, and a drive unit that engages or releases the pair of engagement members. When the hybrid vehicle is in a stopped state, in the clutch device in which the drive unit releases the pair of engagement members in response to a command from the control unit mounted on the hybrid vehicle, the pair of engagement members remain in the engaged state. It is providing the clutch apparatus which can suppress this.

  A clutch device of the present invention is disposed in a power transmission device of a hybrid vehicle including an internal combustion engine and a rotating electric machine as a power source, and a pair of meshing engagement members that can be engaged with each other, and the pair of engagement members Driving means for engaging or releasing the at least one of the engaging members, and at least when the hybrid vehicle is in a stopped state, the driving means releases the pair of engaging members in response to a command from a control means mounted on the hybrid vehicle. The pair of engaging members connect the rotation shaft of the internal combustion engine and the drive shaft of the hybrid vehicle in the power transmission device, and the rotation ratio between the rotation shaft and the drive shaft. Is connected to switching means for switching between a first state that regulates fluctuations in the rotation speed and a second state that permits fluctuations in the rotation ratio, and is engaged by the switching means to cause the movement. An operation member that switches the power transmission device to the first state and releases it to switch the power transmission device to the second state by the switching means and is operated by the driver to a parking position or a position different from the parking position. It is characterized by comprising release means different from the drive means for releasing the pair of engaging members in conjunction with movement of the parking position to the parking position.

  In the clutch device of the present invention, the rotating shaft, the drive shaft, and one engaging member of the pair of engaging members are mutually connected to each other of the planetary gear mechanism as the switching means provided in the power transmission device. The other engaging members are connected to different rotating elements, the other engaging member of the pair of engaging members is provided so as not to rotate, and the one engaging member is connected by engaging the pair of engaging members. Further, the rotation of the rotating element is restricted, the power transmission device is switched to the first state, and released to permit the rotation of the rotating element to which the one engagement member is coupled, thereby allowing the power transmission device to Is switched to the second state.

  In the clutch device of the present invention, the release means is a mechanism that applies a force to release the pair of engagement members mechanically in conjunction with the movement of the operation member to the parking position. And

  In the clutch device of the present invention, the mechanism retracts to a position that does not hinder the engagement and release operations of the pair of engagement members in conjunction with the movement of the operation member to a position different from the parking position. It is characterized by.

  In the clutch device of the present invention, the operation member is a shift lever of a transmission of the hybrid vehicle, and the parking position is a parking position.

  In the clutch device of the present invention, the operation member switches an operation state or non-operation state of the parking brake of the hybrid vehicle, and the parking position is a position for operating the parking brake. And

  A clutch device according to the present invention is a clutch device in which a driving unit releases a pair of engaging members in response to a command from a control unit mounted on the hybrid vehicle at least when the hybrid vehicle is in a stopped state. The engaging member connects the rotation shaft of the internal combustion engine and the drive shaft of the hybrid vehicle in the power transmission device, and regulates the rotation ratio variation between the rotation shaft and the drive shaft, and the rotation ratio variation. It is connected to switching means for switching between the allowed second states. The pair of engaging members engage to switch the power transmission device to the first state by the switching means, and release to switch the power transmission device to the second state by the switching means.

  The clutch device includes a release means different from the drive means for releasing the pair of engaging members in conjunction with the movement of the operation member operated by the driver to the parking position or a position different from the parking position to the parking position. Accordingly, when the operating member is moved to the parking position by the driver, the pair of engaging members are released by the releasing means in addition to the driving means. Therefore, it is suppressed that a pair of engaging member remains in an engagement state.

FIG. 1 is an axial sectional view showing a release mechanism in an embodiment of a clutch device according to the present invention. FIG. 2 is a detailed view of a main part of a transmission equipped with an embodiment of a clutch device according to the present invention. FIG. 3 is an axial cross-sectional view showing details of the configuration of the embodiment of the clutch device according to the present invention. FIG. 4 is an axial sectional view showing a release mechanism in the embodiment of the clutch device according to the present invention.

  Hereinafter, an embodiment of a clutch device according to 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 4. The present embodiment relates to a clutch device that is disposed in a power transmission device of a hybrid vehicle and includes a pair of meshing engagement members that can be engaged with each other and a drive unit that engages or releases the pair of engagement members.

  FIG. 2 is a detailed view of a main part of a transmission (power transmission device) including the clutch device according to the present embodiment. In the following description, the axial direction is a center that is the axis that becomes the center of rotation when the input shaft 5 and the output shaft 6 of the transmission 1 to be described later rotate when the axial line is not described. A direction parallel to the axis 7 is said. Moreover, the radial direction in the same case means a direction orthogonal to the central axis 7, and the circumferential direction means a circumferential direction around the central axis 7. The electromagnetic actuator 40 that is a driving unit of the clutch device 1-1 according to the present embodiment is provided in the transmission 1 that is mounted on a hybrid vehicle (not shown). The transmission 1 is connected to an engine (not shown) as a power source mounted on the vehicle and a generator (rotating electrical machine, not shown) as in the transmission 1, and the transmission 1 An input shaft 5 to which power from the engine is input, a power split mechanism 10 that splits the power input to the input shaft 5, and an output shaft 6 that outputs a part of the power split by the power split mechanism 10 Is provided. A part of the power divided by the power split mechanism 10 is transmitted to the generator. A motor (rotating electrical machine, not shown) is connected to the output shaft 6 of the transmission 1.

  The power split mechanism 10 of the transmission 1 provided in this way has a first planetary gear mechanism 11 and a second planetary gear mechanism 21, and the first planetary gear mechanism 11 is arranged coaxially with each other. The sun gear 12 and the ring gear 14, a plurality of planetary gears 13 interposed between these gears, and a planetary carrier 15 that rotatably supports the planetary gears 13 are provided. Similarly, the second planetary gear mechanism 21 rotatably supports the sun gear 22 and the ring gear 24 arranged coaxially with each other, a plurality of planetary gears 23 interposed between these gears, and the planetary gear 23. And a planetary carrier 25. Of the first planetary gear mechanism 11 and the second planetary gear mechanism 21 provided as described above, the input shaft 5 is connected to the planetary carrier 15 of the first planetary gear mechanism 11 so as to be integrally rotatable. The generator connected to the transmission 1 is connected to the power split mechanism 10, the drive shaft 18 of the generator is formed in a hollow shape coaxial with the input shaft 5, and the first planetary gear mechanism. 11 sun gears 12 so as to be integrally rotatable.

  Further, the ring gear 14 of the first planetary gear mechanism 11 is connected to the planetary carrier 25 of the second planetary gear mechanism 21 so as to be integrally rotatable, and the planetary carrier 25 is connected to the output shaft 6 so as to be integrally rotatable. . That is, the ring gear 14 of the first planetary gear mechanism 11 is connected to the output shaft 6 via the planetary carrier 25 of the second planetary gear mechanism 21 and rotates integrally with the output shaft 6.

  Further, the ring gear 24 of the second planetary gear mechanism 21 is connected to the planetary carrier 15 of the first planetary gear mechanism 11 via a connecting member 26 so as to be integrally rotatable. That is, the ring gear 24 of the second planetary gear mechanism 21 is connected to the input shaft 5 via the connecting member 26 and the planetary carrier 15 of the first planetary gear mechanism 21, and rotates integrally with the input shaft 5.

  The sun gear 22 of the second planetary gear mechanism 21 is disposed on the outer periphery of the output shaft 6 so as to be rotatable relative to the output shaft 6. A clutch wheel 35 is provided at the shaft end (end opposite to the engine side) of the sun gear 22 provided in this manner so as to be integrally rotatable. The clutch wheel 35 protrudes radially outward from the shaft end of the sun gear 22 and is formed in an annular shape. Clutch teeth 36 that are tooth portions of the clutch wheel 35 are formed on the outer periphery of the clutch wheel 35 in the axial direction. A plurality of clutch teeth 36 are formed in the circumferential direction with respect to the clutch wheel 35. The electromagnetic actuator 40 is provided on the outer periphery of the power split mechanism 10. The power split mechanism 10 and the electromagnetic actuator 40 are installed in the housing 3 of the transmission 1.

  FIG. 3 is an axial sectional view showing details of the configuration of the clutch device 1-1. The electromagnetic actuator 40 includes an electromagnetic drive unit 41 and an operation unit 90. The electromagnetic drive unit 41 includes a front cover 45, an outer yoke 55 housed in the front cover 45, an electromagnetic coil 50 housed in the outer yoke 55, and an inner member fixed to one end of the outer yoke 55. A yoke 60, a plunger 70 as a driving object fitted to the inner circumference of the outer yoke 55, and a sleeve 80 fitted to the inner circumference of the plunger 70 are provided. On the outer periphery of the electromagnetic drive unit 41, the front cover 45 and the outer yoke 55, and the outer yoke 55 and the inner yoke 60 are in close contact with each other over the entire periphery thereof. The inner yoke 60 substantially forms a housing on the outer peripheral side of the electromagnetic drive unit 41. The outer yoke 55, the inner yoke 60, and the plunger 70 are made of a magnetic material.

  The inner peripheral surface 56 of the outer yoke 55 is provided in a cylindrical surface shape, and the outer peripheral surface 71 of the plunger 70 fitted to the inner periphery of the outer yoke 55 is also provided in a cylindrical surface shape. Thereby, the plunger 70 is movable in the axial direction of the inner peripheral surface 56 relative to the outer yoke 55. That is, the plunger 70 is slidable in the axial direction along the inner peripheral surface 56 of the outer yoke 55.

  On the inner periphery of the distal end portion of the plunger 70 provided in this way on the inner yoke 60 side, a tapered portion 72 having a shape in which the inner diameter decreases with increasing distance from the inner yoke 60 in the axial direction of the plunger 70 is provided. Yes. In addition, a stopper surface 73 formed of a surface orthogonal to the moving direction of the plunger 70, that is, a surface orthogonal to the axial direction, is provided at the end of the tapered portion 72 on the side away from the inner yoke 60. The stopper surface 73 is formed on the inner peripheral side of the tapered portion 72 and faces the inner yoke 60 in the axial direction.

  On the other hand, a cylindrical portion 61 extending toward the plunger 70 is provided on the surface of the inner yoke 60 facing the plunger 70. A tapered portion 62 formed with a surface inclined in the same direction as the tapered portion 72 of the plunger 70 is provided on the outer periphery of the cylindrical portion 61. Further, a stopper surface 63 formed of a surface orthogonal to the moving direction of the plunger 70, that is, a surface orthogonal to the axial direction, is provided at the tip of the cylindrical portion 61 in the direction of the plunger 70. The stopper surface 63 is opposed to the stopper surface 73 of the plunger 70 in the axial direction.

  In addition, a sleeve receiver 74 formed in a shape protruding in a ring shape toward the inner side in the circumferential direction is provided at an end portion of the plunger 70 located on the opposite side to the inner yoke 60 side in the axial direction. A cylindrical cylindrical portion 46 is formed on the inner peripheral portion of the front cover 45, and the sleeve 80 is fitted into the cylindrical portion 46. Specifically, a cylindrical portion 81 is formed in the sleeve 80, and the cylindrical portion 81 is fitted to the outer periphery of the cylindrical portion 46 of the front cover 45. Further, the inner peripheral surface 64 of the inner yoke 60 is formed in a cylindrical surface shape, and the inner peripheral surface 64 faces the outer peripheral surface of the cylindrical portion 81 of the sleeve 80 in the radial direction. For these reasons, the sleeve 80 is movable in the axial direction relative to the front cover 45 and the inner yoke 60.

  Further, the sleeve 80 is provided with a flange portion 82 formed to extend radially outward from the tip of the cylindrical portion 81 on the inner yoke 60 side. The flange portion 82 is formed along a surface located on the opposite side of the inner yoke 60 from the outer yoke 55 side. The flange portion 82 is provided with a plurality of columnar spring holding portions 83. The spring holding portion 83 is formed on a surface of the flange portion 82 that is located on the opposite side of the inner yoke 60 side in the axial direction, and protrudes away from the inner yoke 60.

  A plurality of oil grooves 75 that are grooves formed in the axial direction are formed on the inner periphery of the plunger 70. The oil grooves 75 are arranged at equal intervals in the circumferential direction of the plunger 70. The front cover 45 is provided with an O-ring 85 that seals between the cylindrical portion 46 of the front cover 45 and the sleeve 80, and the inner yoke 60 is connected to the tubular portion 61 of the inner yoke 60. An O-ring 86 that seals between the sleeve 80 is attached. By these O-rings 85 and 86, the electromagnetic drive unit 41 is sealed to the outside, that is, the first planetary gear mechanism 11 (see FIG. 2) and the second planetary gear mechanism 21 (see FIG. 2). An appropriate amount of lubricating oil for reducing the frictional resistance of the plunger 70 and the sleeve 80 which are movable members of the electromagnetic drive unit 41 is sealed in the space inside the sealed front cover 45.

  The operation unit 90 includes a rear cover 95 and a dog 100 disposed on the inner peripheral side of the rear cover 95. Outer spline teeth 96 are integrally formed on the inner periphery of the rear cover 95, and inner spline teeth 101 that mesh with the outer spline teeth 96 are formed on the outer periphery of the dog 100. The outer spline teeth 96 and the inner spline teeth 101 are each formed in the axial direction. That is, the outer spline teeth 96 and the inner spline teeth 101 are such that the dog 100 and the rear cover 95 can move relative to each other in the axial direction while the outer spline teeth 96 and the inner spline teeth 101 mesh with each other, and in the circumferential direction. It is formed so that relative movement is impossible. That is, the dog 100 is provided so as not to rotate.

  Further, dog teeth 102 that are tooth portions of the dog 100 are formed in the axial direction on the inner periphery of the dog 100. A plurality of dog teeth 102 are formed in the circumferential direction with respect to the dog 100. The dog teeth 102 are formed so as to be able to mesh with the clutch teeth 36 formed on the clutch wheel 35, and are provided so as to be movable in the axial direction with respect to the clutch teeth 36 together with the dog 100. As described above, the dog 100 provided with the dog teeth 102 and the clutch wheel 35 provided with the clutch teeth 36 constitute a dog clutch 30 which is an engaging means. That is, the dog tooth 102 is provided as a main body engaging portion formed in the axial direction on the dog 100 as the main body, and the clutch tooth 36 is a rotating body formed in the axial direction on the clutch wheel 35 as the rotating body. It is provided as an engaging portion, and the dog teeth 102 and the clutch teeth 36 constitute a pair of meshing engagement members.

  A retaining ring 105 is provided between the dog 100 and the cylindrical portion 81 of the sleeve 80. The retaining ring 105 is provided so as to be able to slide relative to the dog 100 and the sleeve 80 in the circumferential direction while restricting relative movement of the dog 100 and the sleeve 80 in the axial direction. Thereby, the dog 100 and the sleeve 80 are combined so as not to be relatively movable in the axial direction and to be relatively rotatable in the circumferential direction.

  Between the rear cover 95 and the spring holding portion 83 of the sleeve 80, a return spring 110 made of a compression spring is held in a state of being appropriately compressed. Specifically, a spring receiving portion 97 is provided on the surface of the rear cover 95 facing the sleeve 80 at a position that is the same position as the spring holding portion 83 of the sleeve 80 in the circumferential direction and the radial direction. That is, the spring holding portion 83 and the spring receiving portion 97 face each other in the axial direction. The spring receiving portion 97 is a concave portion formed on a surface of the rear cover 95 facing the sleeve 80, and a cross-sectional shape in a direction orthogonal to the axial direction corresponds to a cross-sectional shape of the return spring 110, that is, a circular shape. It is formed into a shape. Of the spring holding portion 83 and the spring receiving portion 97, the spring holding portion 83 is formed so that the outer diameter of the cylindrical shape that is the shape of the spring holding portion 83 is slightly smaller than the inner diameter of the return spring 110. ing. Further, the spring receiving portion 97 is formed such that a circular diameter which is a cross-sectional shape of the spring receiving portion 97 is slightly larger than the outer diameter of the return spring 110.

  Further, the return spring 110 is in a compressed state regardless of the position of the sleeve 80 in the axial direction, and an urging force in a direction in which the return spring 110 extends (a direction toward the front cover 45) acts on the sleeve 80. . In other words, the return spring 110 includes the flange portion 82 of the sleeve 80 and the return of the rear cover 95 in a state where the sleeve 80 that can move relative to the front cover 45 and the inner yoke 60 in the axial direction is located closest to the front cover 45. The free length is longer than the distance from the contact surface 98 of the spring 110. For this reason, when the return spring 110 is held between the rear cover 95 and the sleeve 80, the return spring 110 is held in a compressed state.

  The return spring 110 held in a compressed state is held by the spring holding portion 83 entering the inside of the return spring 110 on the sleeve 80 side, and the return spring 110 entering the inside of the spring receiving portion 97 on the rear cover 95 side. Held by. Thus, the sleeve 80 is pushed toward the sleeve receiver 74 of the plunger 70 by the elastic restoring force against the compression of the return spring 110 held between the rear cover 95 and the sleeve 80. That is, the return spring 110 that is held in a compressed state is held in a state in which a biasing force is applied to the rear cover 95 and the sleeve 80 in a direction in which both are separated.

  Further, since the plunger 70 is in axial contact with the sleeve 80 in the sleeve receiver 74, the biasing force of the return spring 110 applied to the sleeve 80 is also applied to the plunger 70 via the sleeve receiver 74. The urging force applied to the plunger 70 via the sleeve 80 is a force in a direction in which the plunger 70 is separated from the inner yoke 60 in the axial direction.

  Further, since the dog 100 and the sleeve 80 are combined so as not to be relatively movable in the axial direction, the urging force of the return spring 110 applied to the sleeve 80 is also applied to the dog 100. The biasing force applied to the dog 100 via the sleeve 80 is a force in a direction in which the dog 100 is separated from the clutch wheel 35. Thus, the return spring 110 is provided so as to be able to apply a biasing force in the direction in which the dog 100 and the clutch wheel 35 are separated from each other to the dog clutch 30. That is, the return spring 110 has a function as a biasing unit that biases the dog 100 in a release direction A <b> 2 described later, and functions as a driving unit that releases the dog teeth 102 and the clutch teeth 36.

  Further, the rear cover 95 is fixed to the housing 3 of the transmission 1 by bolts 115 as fixing means. Thus, the rear cover 95 fixed to the housing 3 functions as a support member for the operation unit 90.

  The vehicle is provided with a control unit (control means) 200 that controls the electromagnetic actuator 40. The control unit 200 is configured by a known microcomputer and includes a CPU, RAM, ROM, input port, output port, common bus, and the like (not shown). The control unit 200 outputs a command value for the current flowing through the electromagnetic coil 50 to the electromagnetic actuator 40. The electromagnetic actuator 40 has a drive circuit (not shown), and controls the current value flowing through the electromagnetic coil 50 as a command value based on the input command value.

  When a current is passed through the electromagnetic coil 50, the outer yoke 55, the inner yoke 60, and the plunger 70 are magnetized, and an attractive force that is a force attracted toward the inner yoke 60 acts on the plunger 70. As a result, the electromagnetic coil 50 applies a suction force according to the command value to the dog 100 via the plunger 70 and the sleeve 80. That is, the control unit 200 is a control unit that engages or disengages the dog clutch 30 by setting a command value of a suction force generated by the electromagnetic coil 50 (a propulsive force that drives the dog 100 in an engagement direction A1 described later). Function.

  The transmission 1 including the electromagnetic actuator 40 according to this embodiment has the above-described configuration, and the operation thereof will be described below. The transmission 1 controls the electromagnetic actuator 40 provided in the transmission 1, an engaged state in which the dog teeth 102 of the dog 100 and the clutch teeth 36 of the clutch wheel 35 are engaged, and the dog 100 of the dog 100. The teeth 102 and the clutch teeth 36 of the clutch wheel 35 are switched to the released state, which is a state in which they are separated in the axial direction. Hereinafter, the direction in which the dog 100 faces the clutch wheel 35 in the axial direction, that is, the direction in which the electromagnetic actuator 40 drives the dog 100 is described as “engagement direction A1”. Further, the direction in which the dog 100 is separated from the clutch wheel 35 in the axial direction, that is, the direction of the urging force applied to the dog 100 by the return spring 110 is described as a “release direction A2”.

  When the dog clutch 30 is in the engaged state, the rotation of the clutch wheel 35 is prevented, so that the rotation of the sun gear 22 of the second planetary gear mechanism 21 provided to rotate integrally with the clutch wheel 35 is also prevented. It becomes a state. On the other hand, when the dog clutch 30 is released, the clutch wheel 35 is allowed to rotate, so that the sun gear 22 of the second planetary gear mechanism 21 is also allowed to rotate.

  As described above, when engine power is transmitted (input) to the transmission 1 controlled by switching between the engaged state and the released state of the dog clutch 30, the engine power is transmitted to the input shaft 5 of the transmission 1. Is transmitted to. As a result, the input shaft 5 rotates, but when the input shaft 5 rotates, the planetary carrier 15 of the first planetary gear mechanism 11 and the ring gear 24 of the second planetary gear mechanism 21 move along with the rotation of the input shaft 5. It rotates at the same speed as the input shaft 5.

  Here, if the rotation of the sun gear 22 of the second planetary gear mechanism 21 is permitted by disengaging the dog clutch 30, the output shaft 6 and the second planetary gear mechanism 21 of the second planetary gear mechanism 21 are driven by the power of the motor. The speed of the planetary carrier 25 and the rotational speed of the planetary carrier 15 of the first planetary gear mechanism 11 and the rotational speed of the ring gear 24 of the second planetary gear mechanism 21 by the power of the engine are the speeds of the second planetary gear mechanism 21. The sun gear 22 idles around the output shaft 6. Further, when the ring gear 14 of the first planetary gear mechanism 11 rotates at a constant speed with the planetary carrier 25 of the second planetary gear mechanism 21, the rotational speed of the ring gear 14 and the planetary carrier 15 of the first planetary gear mechanism 11 are rotated. The sun gear 12 of the first planetary gear mechanism 11 rotates at a speed corresponding to the rotation speed of the first planetary gear mechanism 11, the drive shaft 18 of the generator rotates, and the generator is driven. In this case, the rotational speed of the output shaft 6 by the power of the motor and the rotational speed of the input shaft 5 by the power of the engine can be freely set, and the sun gear 22 of the second planetary gear mechanism 21 rotates them. It idles around the output shaft 6 so as to absorb the speed difference.

  On the other hand, when the rotation of the sun gear 22 of the second planetary gear mechanism 21 is prevented by bringing the dog clutch 30 into the engaged state, the ring gear 24 or the planetary carrier 25 of the second planetary gear mechanism 21 is If one of the rotation speeds is determined, the other rotation speed is also determined. In this case, if the rotational speed of the input shaft 5 by the power of the engine and the rotational speed of the output shaft 6 by the power of the motor are associated with each other and one of these rotational speeds is determined, the first planetary gear The rotational speed of the sun gear 12 of the mechanism 11, that is, the rotational speed of the drive shaft 18 of the generator is also determined. The engaged state of the dog clutch 30 in such a state is used, for example, when the rotational speed of the output shaft 6 is set to a high speed region.

  That is, the second planetary gear mechanism 21 connects the rotation shaft (input shaft 5) of the engine and the drive shaft (output shaft 6) of the hybrid vehicle in the transmission 1 and has a rotation ratio between the rotation shaft and the drive shaft. It functions as a switching means for switching between a first state that regulates fluctuations and a second state that allows fluctuations in the rotation ratio. The dog clutch 30 switches the transmission 1 to the first state by the second planetary gear mechanism 21 when engaged, and switches the transmission 1 to the second state by the second planetary gear mechanism 21 when released.

  The transmission device 1 is switched between the engaged state and the disengaged state of the dog clutch 30 as described above, and the state of the dog clutch 30 is switched by operating the electromagnetic actuator 40. First, the case where the dog clutch 30 is released will be described. When the dog clutch 30 is released, the electromagnetic coil 50 provided in the electromagnetic actuator 40 is de-energized. The urging force of the return spring 110 acts on the sleeve 80, and the force moving in the direction away from the rear cover 95, that is, the release direction A <b> 2 acts and is pushed in the direction of the front cover 45. As a result, the end portion of the sleeve 80 on the front cover 45 side comes into contact with the sleeve receiver 74 of the plunger 70, and the plunger 70 is pushed in the direction of the front cover 45 together with the sleeve 80. The plunger 70 pushed in the direction of the front cover 45 is stopped by coming into contact with the front cover 45, and the sleeve 80 is also stopped and held together with the stop of the plunger 70. Thus, the plunger 70 and the sleeve 80 when the electromagnetic coil 50 is in a non-excited state are held at the standby position (position in FIG. 3) that is a position away from the rear cover 95 in the axial direction.

  Further, since the dog 100 is combined with the sleeve 80 through the retaining ring 105 so as not to move relative to the axial direction, when the sleeve 80 is pushed in the direction of the front cover 45, the dog 100 is also in the same direction ( Move in release direction A2). In this case, the meshing between the inner spline teeth 101 of the dog 100 and the outer spline teeth 96 of the rear cover 95 is maintained, but the dog teeth 102 are completely separated from the clutch teeth 36 of the clutch wheel 35 in the axial direction. That is, the dog teeth 102 and the clutch teeth 36 are not engaged with each other, and no torque is transmitted between the dog teeth 102 and the clutch teeth 36. Accordingly, when the electromagnetic coil 50 is in a non-excited state, the dog 100 and the clutch wheel 35 are separated from each other, so that torque in the rotational direction of the clutch wheel 35 is not transmitted between the dog 100 and the clutch wheel 35. It becomes a released state that is a state.

  On the other hand, when the electromagnetic coil 50 is excited, a magnetic field is generated around the electromagnetic coil 50. When a magnetic field is generated in this way, a magnetic path that goes around the outer yoke 55, the inner yoke 60, and the plunger 70 disposed so as to surround the electromagnetic coil 50 is formed. Thereby, the outer yoke 55, the inner yoke 60, and the plunger 70 are magnetized along the magnetic path. The magnetized plunger 70 is drawn toward the inner yoke 60 while being guided by the inner peripheral surface 56 of the outer yoke 55. That is, a suction force that is a force attracted toward the inner yoke 60 acts on the plunger 70. As described above, the plunger 70 and the inner yoke 60 are provided as the electromagnetic operating portion 43 that is an operating means that operates so that both approach when the attractive force generated by the electromagnetic coil 50 is applied. The electromagnetic coil 50 is provided as an attractive force generating means for generating this attractive force.

  As described above, when the plunger 70 moves in the direction of the inner yoke 60 by the action of the suction force, the sleeve 80 that is in contact with the sleeve receiver 74 of the plunger 70 has a moving direction ( The force in the engagement direction A1) acts, in other words, a suction force acts on the sleeve 80 via the plunger 70. A biasing force in the direction of the front cover 45 (release direction A2) is applied by the return spring 110 to the sleeve 80 on which the suction force acts, but the suction force acts on the sleeve 80 with a force larger than the biasing force. Therefore, the plunger 70 and the sleeve 80 move in the engagement direction A1, which is the direction in which the suction force acts, that is, in the direction away from the front cover 45 and approaching the rear cover 95.

  When the sleeve 80 moves in the engagement direction A1, the dog 100 also moves in the same direction. For this reason, the dog teeth 102 of the dog 100 and the clutch teeth 36 of the clutch wheel 35 begin to overlap in the axial direction. As a result, the dog teeth 102 and the clutch teeth 36 are in mesh with each other, and torque can be transmitted between the dog teeth 102 and the clutch teeth 36. Accordingly, when the electromagnetic coil 50 is energized, the clutch wheel 35 is switched to an engaged state where torque in the rotational direction of the clutch wheel 35 can be transmitted between the dog 100 and the clutch wheel 35. Further, in this way, the electromagnetic coil 50 uses the electromagnetic force to the dog clutch 30 to apply a suction force that is a force for bringing the dog 100 and the clutch wheel 35 in a separated state closer to each other via the plunger 70 and the sleeve 80. It is provided so that it can be granted. That is, the electromagnetic actuator 40 functions as a driving unit that engages the dog teeth 102 and the clutch teeth 36.

  The control unit 200 switches between the engaged state and the released state of the dog clutch 30 according to the rotation speed of the output shaft 6. Specifically, the control unit 200 brings the dog clutch 30 into an engaged state when predetermined conditions including a condition that the rotation speed of the output shaft 6 is high are satisfied. In other words, the control unit 200 excites the electromagnetic coil 50 to bring the dog clutch 30 into an engaged state when predetermined conditions including a condition in which the vehicle is traveling at a high vehicle speed are satisfied. The control unit 200 releases the dog clutch 30 when the rotation speed of the output shaft 6 is low, when the rotation of the output shaft 6 is stopped, or when the predetermined condition is not satisfied. State. In other words, the control unit 200 determines whether the vehicle is traveling at a low vehicle speed, when the vehicle is stopped, or even when the vehicle is traveling at a high vehicle speed. If the condition is not satisfied, the electromagnetic coil 50 is de-energized and the dog clutch 30 is released. That is, the dog clutch 30 is controlled to the released state by a command from the control unit 200 at least when the hybrid vehicle is in a stopped state.

  Here, when the control unit 200 performs control to release the dog clutch 30 such as when the vehicle stops, it is desirable that the dog clutch 30 is reliably released. Even if the dog clutch 30 is in an operating state in which the dog clutch 30 is to be released, if the dog clutch 30 remains engaged without being released, the startability of the engine may be reduced. This problem occurs when the generator also serves as a starter motor that starts the engine. When the engine is started, the dog clutch 30 is released and the generator drive shaft 18 is rotated by the generator. As a result, the sun gear 12 of the first planetary gear mechanism 11 rotates, whereby the planetary carrier 15 and the input shaft 5 rotate, and the engine is started. That is, when the engine is started, the generator functions as a starter motor that starts the engine. However, if the dog clutch 30 is in an engaged state when the engine is started, the power split mechanism 10 is locked in a state where the gear ratio is high, which makes it difficult for the rotational speed of the input shaft 5 to increase, and the engine startability is improved. There is a possibility of lowering.

  As a control for releasing the dog clutch 30, a case where the dog clutch 30 is not released even though the electromagnetic coil 50 is in a non-excited state may be a case where foreign matter is caught or the dog clutch 30 is tilted. On the other hand, in order to prevent the dog clutch 30 from remaining engaged, a method using a return spring 110 that applies a large biasing force can be considered. In this case, the dog clutch 30 is brought into an engaged state. In addition, it is necessary to increase the attractive force generated by the electromagnetic actuator 40, and the power consumption of the electromagnetic actuator 40 increases.

  As will be described below, the clutch device 1-1 of the present embodiment includes a release mechanism 120 that releases the dog clutch 30 in conjunction with the movement of the shift lever when the shift lever is operated to the P range (parking position). I have. When the shift position is set to the P range (parking position) when the vehicle is stopped, the release mechanism 120 performs an operation of releasing the dog clutch 30 in conjunction with a shift operation to the P range (movement of the shift lever to the P range). For this reason, it is suppressed that the dog clutch 30 remains in the engaged state in the operation state in which the dog clutch 30 should be released.

  FIG. 4 is an axial cross-sectional view showing the release mechanism (release means) 120 of the clutch device 1-1 of the present embodiment. FIG. 1 is a sectional view in the axial direction showing the release mechanism 120 of the clutch device 1-1 of the present embodiment, and shows the state where the release mechanism 120 releases the dog clutch 30.

  The phase in the circumferential direction of the cut surface of the sectional view shown in FIG. 4 is different from the phase in the circumferential direction of the cut surface of the sectional view shown in FIG. That is, FIG. 3 shows a cross section including the return spring 110, and FIG. 4 shows a cross section including the pressing member 123 of the release mechanism 120. In FIG. 4, reference numeral 120 indicates the release mechanism 120. The release mechanism 120 is a link mechanism, and includes a first link 121, a second link 122, a pressing member 123, a cable 125, and a return spring 126.

  The first link 121 is fixed so as not to move with respect to the housing 3. The first link 121 is provided on the engagement direction A1 side of the rear cover 95 in the housing 3 and protrudes from the housing 3 in the engagement direction A1. An end of the first link 121 opposite to the side fixed to the housing 3 (engagement direction A1 side) is connected to the second link 122 at a connection point 127. The center part of the second link 122 is supported by the connection point 127 and is arranged in the radial direction. The second link 122 can swing around the connection point 127 as a center point. In other words, the second link 122 has a radially inner end 122a approaching the rear cover 95 with the connection point 127 as the rotation center (clockwise direction in FIG. 4, hereinafter referred to as “first rotation direction R1”). On the other hand, the end 122a on the radially inner side is separated from the rear cover 95 with the connection point 127 as the rotation center (counterclockwise direction in FIG. 4, hereinafter referred to as “second rotation direction R2”). It can be rotated. A radially inner end 122 a of the second link 122 is connected to the pressing member 123 at a connection point 128.

  The pressing member 123 is a rod-like or plate-like member, and is fitted into a communication hole 124 formed in the rear cover 95. The communication hole 124 is formed at the end of the rear cover 95 on the engagement direction A1 side. The communication hole 124 is formed at a position facing the flange portion 82 of the sleeve 80 in the axial direction, and penetrates the rear cover 95 in the axial direction. Spline teeth 124 a in the axial direction are formed on the inner peripheral surface of the communication hole 124. Spline teeth 123 a are formed on the outer peripheral surface of the pressing member 123. The communication hole 124 and the pressing member 123 are in spline engagement with the spline teeth 124a and the spline teeth 123a. The pressing member 123 is supported by the communication hole 124 so as to be slidable in the axial direction, and can reciprocate in the axial direction along the communication hole 124. The pressing member 123 is connected to the second link 122 at a connection point 128 at the end in the engagement direction A1. When the second link 122 swings about the connection point 127, the pressing member 123 is driven in the axial direction by the swing.

  A cable 125 is connected to the radially outer end 122 b of the second link 122. One end of the cable 125 is connected to the second link 122 and the other end is connected to a shift lever (not shown). The cable 125 extends from the second link 122 in the engagement direction A1, and a driver's operation on the shift lever is transmitted to the second link 122 by the cable 125. In other words, the radially outer end 122b of the second link 122 is connected to the shift lever via the cable 125, and the second link 122 moves in conjunction with the shift lever movement accompanying the driver's shift operation. The radially outer end 122b is driven in the axial direction. More specifically, when the driver operates the shift lever to the P range, the change in the position of the shift lever causes the cable 125 to be pulled, and the end 122b on the radially outer side of the second link 122 is engaged. Driven in the combined direction A1.

  The return spring 126 is installed in a compressed state between the second link 122 and a portion of the housing 3 that is located closer to the engagement direction A1 than the second link 122. The return spring 126 is disposed in the axial direction and expands and contracts in the axial direction. The end of the return spring 126 on the release direction A2 side is in contact with the outer side in the radial direction with respect to the connection point 127 in the second link 122, and the end of the engagement direction A1 is in contact with the housing 3. Therefore, the urging force acting on the second link 122 from the return spring 126 drives the second link 122 in the second rotation direction R2.

  FIG. 4 shows the state of the release mechanism 120 when the shift position is in a range other than the P range, and FIG. 1 shows the state of the release mechanism 120 when the shift position is in the P range.

  When the shift position is in the P range, as shown in FIG. 1, the cable 125 is pulled in the engagement direction A1 in conjunction with the movement of the shift lever by the shift operation to the P range with respect to the shift lever. In the arrangement of the shift position in the shift lever of this embodiment, the position of the P range is set at the end of the arrangement direction of each range. In other words, the position of the P range is set at one end of the movable range of the shift lever. When the shift lever moves from the position in the movable range adjacent to the P range (such as the R range) to the end where the P range is disposed, the cable 125 is connected to the radially outer end of the second link 122. The part 122b is driven toward the engagement direction A1.

  As a result, the second link 122 rotates in the first rotation direction R1 around the connection point 127 against the urging force of the return spring 126. As a result, the pressing member 123 is driven in the release direction A <b> 2, is guided by the communication hole 124, and moves toward the flange portion 82 of the sleeve 80. The pressing member 123 in contact with the flange portion 82 presses the sleeve 80 together with the return spring 110 (see FIG. 3) in the release direction A2. As a result, even if the dog clutch 30 is not released due to a catch or the like and remains engaged, the sleeve 80 is driven in the release direction A2 by being driven by the pressing member 123 and the return spring 110, and the dog clutch 30 is released. Is done.

  When the shift position is switched from the P range to another range (for example, D range) such as at the start of traveling, the cable 125 is connected to the cable 125 in conjunction with the movement of the shift lever by a shift operation to a range other than the P range with respect to the shift lever. The pulling force in the engagement direction A1 decreases or becomes zero. As a result, the force in the second rotational direction R2 by the return spring 126 is greater than the force in the first rotational direction R1 on the second link 122. As a result, the second link 122 rotates in the second rotation direction R2 by the urging force of the return spring 126, and the pressing member 123 moves in the engagement direction A1. At this time, in the pressing member 123, the end portion (tip portion) 123b on the release direction A2 side is retracted into the communication hole 124 (see FIG. 4), and the dog clutch 30 is released and engaged by the electromagnetic actuator 40 and the return spring 110. Move to a position that does not affect operation.

  That is, the pressing member 123 retracts out of the movable range of the flange portion 82 of the sleeve 80 in conjunction with the movement of the shift lever when the shift position is operated to a range other than the P range. As a result, the release mechanism 120 does not affect the engagement or release control of the dog clutch 30 by the electromagnetic actuator 40 and the return spring 110. Further, when the shift position is operated to the P range, the pressing member 123 is driven in the release direction A2 in conjunction with the movement of the shift lever and comes into contact with the flange portion 82 of the sleeve 80 to bring the sleeve 80 into the release direction A2. To drive. In other words, in conjunction with the movement of the shift lever to the P range, the release mechanism 120 applies a driving force in the release direction A2 that separates the dog 100 of the dog clutch 30 from the clutch wheel 35. This suppresses the dog clutch 30 from remaining in the engaged state despite the shift position being set to the P range. Therefore, it is possible to prevent the engine startability from deteriorating due to the next engine start with the dog clutch 30 engaged.

  A plurality of pressing members 123 are arranged at predetermined intervals in the circumferential direction with respect to the flange portion 82 of the sleeve 80. Thereby, it is suppressed that the magnitude of the driving force acting in the release direction A <b> 2 from the pressing member 123 to the flange portion 82 is biased depending on the circumferential position of the flange portion 82.

  Thus, according to the release mechanism 120 that releases the dog clutch 30 mechanically in conjunction with the shift lever movement by the driver's shift operation, the dog clutch 30 is released regardless of whether the vehicle control system is activated or not. Can do.

  In the present embodiment, the release mechanism 120 converts the movement of the shift lever to the P range into the operation of driving the pressing member 123 by the link mechanism. It is only necessary that the pressing member 123 is driven in conjunction. For example, the release mechanism 120 may drive the pressing member 123 by hydraulic pressure in conjunction with the shift operation. In this case, for example, the release mechanism 120 acts as an actuator that causes the hydraulic pressure of the pressure accumulation chamber to act on the pressing member 123 to drive the pressing member 123 in the release direction A2, and an oil path that connects the pressure accumulation chamber and the pressing member 123; And a biasing means such as a spring for biasing the pressing member 123 in the engagement direction A1 against the force of hydraulic pressure. The control valve is mechanically connected to the shift lever so as to operate in accordance with the position of the shift lever, and supplies hydraulic pressure to the pressing member 123 when the shift lever is in the P range. Thus, the hydraulic pressure drives the pressing member 123 in the release direction A2 against the urging force of the urging means, and the dog clutch 30 is released. On the other hand, when the shift lever is in a range other than the P range, the control valve shuts off the oil passage between the pressure accumulating chamber and the pressing member 123 and discharges the hydraulic oil driving the pressing member 123. Accordingly, the pressing member 123 is driven in the engagement direction A1 by the urging force of the urging means and retracts out of the movable range of the flange portion 82 of the sleeve 80.

  In the present embodiment, a plurality of pressing members 123 are arranged in the circumferential direction with respect to the flange portion 82 of the sleeve 80, but the arrangement of the pressing members 123 is not limited to this. The pressing member 123 only needs to be arranged so that the sleeve 80 can be driven in the release direction A2, and may be arranged annularly in the circumferential direction with respect to the flange portion 82, and is arranged at one place in the circumferential direction. Also good.

  Further, the release mechanism 120 of the present embodiment may be applied to a clutch device other than the meshing dog clutch. For example, if it is a friction engagement type clutch such as a wet multi-plate clutch that is released or engaged according to the driving state, and the clutch is controlled to the released state at least when the vehicle is stopped, By applying the release mechanism 120 of the present embodiment, it is possible to prevent the clutch from remaining in the engaged state.

  The dog clutch 30 of the present embodiment functions as a brake that prevents the rotation of the clutch wheel 35 by engaging, but by engaging one engagement member and the other engagement member, May rotate together.

(First Modification of Embodiment)
A first modification of the embodiment will be described.

  In the above embodiment, the shift lever movement due to the shift position being operated to the P range and the operation of the release mechanism 120 releasing the dog clutch 30 are mechanically linked. The release mechanism 120 may be operated by control in conjunction with the operation of the P range and the detection that the shift position is the P range.

  In this case, the release mechanism 120 includes, for example, an actuator that drives the pressing member 123 and is controlled by the control unit 200. When detecting that the shift lever is operated to the P range or that the shift position is the P range, the control unit 200 controls the actuator to drive the pressing member 123 in the release direction A2. When it is detected that the shift lever is operated to a range other than the P range or the shift position is a range other than the P range, the actuator is controlled to drive the pressing member 123 in the engagement direction A1.

  The means for releasing the dog clutch 30 is not limited to the method of pressing the sleeve 80 by the pressing member 123. For example, the dog clutch 30 may be released by applying a suction force in the release direction A <b> 2 to the sleeve 80 by an electromagnetic force of an electromagnetic actuator similar to the electromagnetic actuator 40.

(Second Modification of Embodiment)
A second modification of the embodiment will be described.

  In the above embodiment, the shift position at which the release mechanism 120 releases the dog clutch 30 is the P range. However, the release mechanism 120 is configured to perform an operation of releasing the dog clutch 30 in a predetermined range other than the P range. May be. For example, in the transmission 1 having a range for low-speed travel, the release mechanism 120 performs an operation of releasing the dog clutch 30 in conjunction with the movement of the shift lever when the shift lever is operated to the range for low-speed travel. It may be. In this case, a mechanism for driving the pressing member 123 in conjunction with the movement of the shift lever to the P range, and a mechanism for driving the pressing member 123 in conjunction with the movement of the shift lever by being operated to the range for low speed traveling. And may be different.

(Third Modification of Embodiment)
A third modification of the embodiment will be described.

  In the above embodiment, the release mechanism 120 performs the operation of releasing the dog clutch 30 in conjunction with the movement of the shift lever by the driver's operation. However, the operation member other than the shift lever is operated by the driver's operation. The release mechanism 120 may perform an operation of releasing the dog clutch 30 in conjunction with the movement.

  For example, the release mechanism 120 can be configured to operate in conjunction with the movement of the operation member by the driver's operation with respect to the parking brake. The release mechanism 120 is connected to a parking brake operating member (for example, a parking brake pedal) via a cable or the like. When the driver's operation to turn on the parking brake (depressing the parking brake pedal) is performed, the pressing member 123 is driven in the release direction A2 in conjunction with the movement of the parking brake pedal, and the parking brake is turned off. The pressing member 123 is driven in the engagement direction A1 by the urging force of the return spring 126. Even with such a configuration, the dog clutch 30 is prevented from remaining engaged.

1-1 Clutch device 1 Transmission device 3 Housing 5 Input shaft 6 Output shaft 7 Center shaft 10 Power split mechanism 11 First planetary gear mechanism 21 Second planetary gear mechanism 30 Dog clutch 35 Clutch wheel 36 Clutch tooth 40 Electromagnetic actuator 50 Electromagnetic coil 80 Sleeve 82 Flange part 95 Rear cover 100 Dog 102 Dog tooth 110 Return spring 120 Release mechanism 121 First link 122 Second link 123 Press member 124 Communication hole 125 Cable 126 Return spring 127, 128 Connection point 200 Control part A1 Engagement direction A2 Release Direction R1 First rotation direction R2 Second rotation direction

Claims (6)

A pair of meshing engagement members that can be engaged with each other, and a drive that engages or releases the pair of engagement members, disposed in a power transmission device of a hybrid vehicle including an internal combustion engine and a rotating electrical machine as a power source A clutch device for releasing the pair of engaging members by a command from a control means mounted on the hybrid vehicle when at least the hybrid vehicle is in a stopped state.
The pair of engagement members connect a rotation shaft of the internal combustion engine and a drive shaft of the hybrid vehicle in the power transmission device, and regulate a variation in a rotation ratio between the rotation shaft and the drive shaft. Switching means for switching between a state and a second state allowing the fluctuation of the rotation ratio, and by engaging, the power transmission device is switched to the first state by the switching means and released to release the state. The power transmission device is switched to the second state by switching means,
A release means different from the drive means for releasing the pair of engagement members in conjunction with a movement of the operation member operated by the driver to a parking position or a position different from the parking position to the parking position; A clutch device characterized by the above. The clutch device according to claim 1,
One engaging member of the rotating shaft, the driving shaft, and the pair of engaging members is respectively connected to different rotating elements of the planetary gear mechanism as the switching means provided in the power transmission device. ,
The other engagement member of the pair of engagement members is provided so as not to rotate,
The pair of engaging members are engaged to restrict rotation of the rotating element to which the one engaging member is connected, switch the power transmission device to the first state, and release the power transmission device. A clutch device characterized in that the power transmission device is switched to the second state while allowing rotation of the rotating element to which one engaging member is coupled. The clutch device according to claim 1 or 2,
The release device is a mechanism that applies a force to release the pair of engagement members mechanically in conjunction with the movement of the operation member to the parking position. In the clutch device according to claim 3,
The clutch device is retracted to a position that does not hinder the engagement and release operations of the pair of engagement members in conjunction with the movement of the operation member to a position different from the parking position. In the clutch device according to any one of claims 1 to 4,
The clutch device, wherein the operation member is a shift lever of a transmission of the hybrid vehicle, and the parking position is a parking position. In the clutch device according to any one of claims 1 to 4,
The operation member is for switching an operation state or a non-operation state of a parking brake of the hybrid vehicle, and the parking position is a position for operating the parking brake.

Images