JP2018096382A - Meshing-type engagement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly grasp a state of both engagement elements without using a linear sensor.SOLUTION: A meshing-type engagement device has first and second meshing engagement elements 11, 12, a coil 21, a permanent magnet 22 and a yoke 24 disposed at their outer peripheries, releasing force application means 23 for applying releasing force to operate both meshing engagement elements to a release side, and engagement control means 32 for controlling energization of the coil, and axially moving the meshing engagement element 11 by using magnetic force by operating magnetic field penetrating through both meshing engagement elements to switch and control an engagement state. A release position, a fastening position and a tooth tip contact position are provided in relation to relative positions of meshing engagement elements, and an on/off type position sensor 41 switching on/off of a signal between the release position and the tooth tip contact position, an electric current sensor 42 detecting an electric current value of the coil, and position determination means 31 for determining the tooth tip contact position when on/off of the position sensor is switched, and determining the fastening position when the electric current value of the electric current sensor indicates falling, in switching from the release position to the fastening position, are further provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a meshing engagement device applied as a clutch or a brake to a transmission or the like.

For example, a meshing engagement device, which is also called a dog clutch or a tooth clutch, is known as an engagement device applied to a transmission or the like (see Patent Document 1).
In this meshing engagement device, meshing teeth are formed on the opposing surfaces of a pair of meshing engagement elements (also simply referred to as engagement elements), and the pair of engagement elements approach and meshing with each other. And the pair of engaging elements are separated, and the respective meshing teeth are disengaged to release.

  Such a meshing engagement device is configured to switch between engagement and release between two members by controlling the current to the coil (electromagnet) (hereinafter referred to as “meshing electromagnetic coupling”). Also known as “combining device”).

  In this meshing electromagnetic engagement device, for example, a return spring (release force applying member) that applies force in a direction to release (release) the mutual engagement is provided between a pair of engagement elements. A coil and a permanent magnet are provided on the outer periphery of the combined element. When these engagement elements are engaged from the released state, the coil is energized to generate a magnetic field, and electromagnetic elements are used to bring both engagement elements close to each other against the return spring and engage. When releasing both engaging elements from the engaged state, a magnetic field is generated in a direction opposite to that when the coil is engaged, and the both engaging elements are separated and released using a reverse electromagnetic force.

  In such a meshing electromagnetic engagement device, when switching both engagement elements between the released state and the fully engaged state, the positional relationship between the two engagement elements can be properly grasped when switching control is performed. I need it. The positional relationship between the two engaging elements in this case is a tooth in which the tips (tooth tips) of the convex portions (tooth portions) of both engaging elements are in contact between the fully released state and the fully engaged state. There is a pre-contact state.

  For example, when switching from release to engagement, the tooth tip contact state where the tooth tips of both engagement elements are in contact unless the rotational phases of the recesses (grooves) and the projections (tooth parts) of both engagement elements match. Thus, there are cases where both engaging elements cannot be engaged in this state. The state in which engagement is not possible in this tooth tip contact state occurs due to a lack of rotational torque of the drive side member of both engagement elements. Therefore, in such a tooth tip contact state, both engagements are performed by performing control to increase the rotational torque. The elements can be engaged. Therefore, if it can be grasped that the tooth tip is in contact, the engagement control can be appropriately performed.

JP 2006-017539 A

  By the way, in order to appropriately grasp the positional relationship between the two engagement elements, for example, a sensor that can linearly detect the position of the other engagement element in the axial direction with reference to one engagement element. It is conceivable to provide it.

  However, a sensor that can detect linearly has a complicated mechanism, and in the case of a meshing electromagnetic engagement mechanism, it is necessary to consider providing it at a position that is not affected by electromagnetic force, so that the position can be detected linearly. When the sensor is provided, there is a problem that the entire meshing engagement device is enlarged or is restricted in layout.

  The present invention has been devised in view of such a problem, and it is possible to suppress the increase in size of the meshing engagement device without using a linear sensor, while the two engagement elements are completely engaged, contacted with the teeth, and completely released. It is an object of the present invention to provide a meshing engagement device that can appropriately grasp which of the above states.

  (1) In order to achieve the above object, the meshing engagement device of the present invention has meshing teeth, the meshing teeth are arranged to face each other so that they can mesh with each other, and can rotate on the support members. The first and second meshing engagement elements that are pivotally supported, the coil, the permanent magnet, and the yoke that are provided on the outer periphery of the first and second meshing engagement elements, and the first and second meshing elements Release force applying means for applying a release force for operating the engagement element to the release side between the first and second meshing engagement elements, and controlling the energization to the coil to control the first and second meshing. By manipulating the magnetic field penetrating the engagement element, the first meshing engagement element is moved in the axial direction using magnetic force, and the first and second meshing engagement elements are completely released and fully engaged. Engaging control means for switching control between the first and second meshing engagement requirements. Relative disengagement positions: a complete release position in which the tips of the meshing teeth are separated from each other, a complete engagement position in which the meshing teeth are completely meshed with each other, and an intermediate position between the complete release position and the complete engagement position. A meshing engagement device having a tooth tip contact position at which the respective tooth tips of the meshing teeth are in contact with each other, wherein the first and second meshing engagement elements are completely disengaged from each other. An on / off type position sensor that switches on / off of a signal between the tooth tip contact position, a current sensor that detects a current value of the coil, and the first and second meshing engagement elements from the fully released position When the on / off signal of the position sensor is switched when switching to the full engagement position, it is determined that the position sensor has moved to the tooth tip contact position, and when the current value detected by the current sensor indicates a drop, the full engagement position In It determines that the movement is characterized by having a position determining means.

  (2) When the engagement control means switches the first and second meshing engagement elements from the complete release position to the complete engagement position, the engagement control means causes the first and second meshing engagement elements to approach each other. When the position determination means determines that the first and second meshing engagement elements have moved to the complete engagement position, the coil is instructed to supply a current so that a magnetic force is generated on the coil side. It is preferable to instruct to stop the current supply.

  (3) When the first and second meshing engagement elements are switched from the fully released position to the complete engagement position, a magnetic force is generated on the side where the first and second meshing engagement elements are approached. As described above, even when the engagement control means instructs the coil to supply current, the position determination means does not determine that the first and second meshing engagement elements have moved to the complete engagement position. It is preferable to provide failure determination means for determining that the failure is not engageable.

  (4) When the first and second meshing engagement elements are switched from the complete engagement position to the complete release position, the position determination means moves to the complete release position when the on / off signal of the position sensor is switched. It is preferable to determine that it has been.

  (5) The engagement control means separates the first and second meshing engagement elements when switching the first and second meshing engagement elements from the complete engagement position to the complete release position. When the position determination means determines that the first and second meshing engagement elements have moved to the fully released position, the coil is instructed to supply a current so as to generate a magnetic force on the side. It is preferable to stop the current supply.

  (6) When the first and second meshing engagement elements are switched from the complete engagement position to the complete release position, a magnetic force is generated on the side separating the first and second meshing engagement elements. Thus, even when the engagement control means instructs the coil to supply current, when the position determination means does not determine that the first and second meshing engagement elements have moved to the complete release position, It is preferable that a failure determination unit that determines that the failure is not releasable is provided.

  (7) It is preferable that the position determination unit determines that the position has moved from the tooth tip contact position to the complete engagement position when the current value shows a drop of a preset decrease amount or more.

  (8) The support member that supports the coil, the permanent magnet, and the yoke is configured to rotate at the complete engagement position and to be non-rotatable at the complete release position, and the position sensor is fixed to the support member. An off state in which the first meshing engagement element is in contact with the sensor support, and an on state in which the first meshing engagement element is not in contact. It is preferable that a detecting body having a leading end detection unit is provided, and a bearing device is mounted on the leading end detection unit.

  According to the present invention, when the first and second meshing engagement elements are switched from the fully released position to the fully engaged position, the position determining means is based on the on / off signal of the position sensor and the current value of the coil by the current sensor. Since it is determined that the tooth has moved to the tip contact position and the complete engagement position, the complete engagement position, the tip contact position, or the complete release position can be properly detected without using a linear sensor. An increase in size can be suppressed.

  Further, the failure determination means generates a magnetic force on the side where the first and second meshing engagement elements are approached when the first and second meshing engagement elements are switched from the fully released position to the complete engagement position. Thus, even if the coil is instructed to supply current, if it is not determined that the first and second meshing engagement elements have moved to the fully engaged position, it is determined that there is an incompatibility failure. Impossible faults can be reliably detected in a short time.

  Further, when the first and second meshing engagement elements are switched from the complete engagement position to the complete release position, the position determination means determines that the position sensor has moved to the complete release position from the on / off signal of the position sensor. The shift from the complete engagement position to the complete release position can be detected appropriately without using the device, and the increase in size of the apparatus can be suppressed.

  Further, the failure determination means generates a magnetic force on the side separating the first and second meshing engagement elements when the first and second meshing engagement elements are switched from the complete engagement position to the complete release position. Thus, even if the coil is instructed to supply current, if it is not determined that the first and second meshing engagement elements have moved to the fully released position, it is determined that the failure is not releaseable. It can be reliably detected in a short time.

  Further, if the bearing device is attached to the first meshing engagement element and the tip detection portion of the position sensor with which the first meshing engagement element abuts, the position sensor and the first meshing engagement element are Relative rotation can be performed without hindrance, friction at the time of contact with the tip detection unit can be reduced, and durability of the position sensor is also ensured.

It is the longitudinal cross-sectional view (upper half part) and side view (lower half part) of the meshing type engagement apparatus which concern on one Embodiment of this invention. It is a principal part longitudinal cross-sectional view explaining operation | movement of the axial direction moving mechanism 20 of the meshing type engaging apparatus which concerns on one Embodiment of this invention, (a) shows the magnetic field state hold | maintained in a complete release position, (b) Indicates a magnetic field state that is moved from the fully released position to the fully engaged position, (c) indicates a magnetic field state that is held in the fully engaged position, and (d) is a magnetic field state that is moved from the fully engaged position to the fully released position. Indicates. It is a side view which shows the position sensor of the meshing engagement apparatus which concerns on one Embodiment of this invention, (a) shows the ON state of a position sensor, (b) shows the OFF state of a position sensor. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram explaining the switching operation | movement from the complete release position of the meshing engagement apparatus which concerns on one Embodiment of this invention to a complete engagement position, Comprising: (a) is a schematic diagram which shows the state of a complete release position, ( b) is a schematic diagram showing the state of the tooth tip contact position, and (c) is a schematic diagram showing the state of the complete engagement position. It is a schematic diagram explaining the switching operation | movement from the complete engagement position of the meshing engagement apparatus which concerns on one Embodiment of this invention to a complete release position, Comprising: (a) is a schematic diagram which shows the state of a complete engagement position, (B) is a schematic diagram showing the state of the release process, and (c) is a schematic diagram showing the state of the complete release position. It is a flowchart explaining the switching operation | movement from the complete release position of the meshing engagement apparatus which concerns on one Embodiment of this invention to a complete engagement position. It is a flowchart explaining the switching operation | movement from the complete engagement position to the complete release position of the meshing engagement device which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the following embodiments can be implemented with various modifications without departing from the spirit thereof, and can be selected or combined as appropriate.

〔Device configuration〕
As shown in FIG. 1, an input shaft 1 connected to a drive source (not shown) (not shown) and a rotation center (not shown) provided on the same axis (rotation axis O ₁ ) as the input shaft 1 are provided. And an output gear 2 having gear teeth 2a for outputting rotational force to the element. The output gear 2 is rotatably disposed on the outer periphery of the input shaft 1 via bearings 3a and 3b. The meshing engagement device (also referred to as a clutch) 10 is interposed between the input shaft 1 and the output gear 2.

  In the present embodiment, the rotating element that outputs the rotational force of the output gear 2 is a part of the drive train of the vehicle. That is, the meshing engagement device 10 is drivingly connected when a motor is used as a drive source of a vehicle in a hybrid vehicle using an engine (not shown) and an unshown motor (electric motor) as drive sources. When the motor is not used as a vehicle drive source, it is used for releasing the drive connection.

The meshing engagement device 10 includes a first armature (first meshing engagement element) 11 that rotates integrally with the input shaft 1 and a second armature (second meshing engagement element) that rotates integrally with the output gear 2. ) 12. The first and second armatures 11 and 12 are both formed in a disk shape using a magnetic material, and are arranged concentrically adjacent to each other on the rotation axis O ₁ . The first armature 11 is axially movable with respect to the input shaft 1 by spline coupling or the like and connected so as to rotate integrally. The second armature 12 is coupled to the output gear 2 so as to rotate integrally with a bolt or the like.

  Engaging teeth 11 a and 12 a that can mesh with each other are formed on the mutually opposing surfaces of the first and second armatures 11 and 12 (here, near the outer periphery of the opposing surfaces). The first and second armatures 11 and 12 are in a completely released state in which the meshing teeth 11a and 12a are separated from each other according to the axial position of the first armature 11 so that the engagement is completely released (hereinafter referred to as the engagement state). , Simply referred to as a released state), a tooth contact state in which the tooth tips of the meshing teeth 11a and 12a are in contact with each other, and a completely engaged state in which the meshing teeth 11a and 12a are completely meshed with each other (hereinafter, , Simply referred to as a fastening state).

  The first armature 11 includes a complete release position (hereinafter also simply referred to as a release position) in which the armatures 11 and 12 are in a released state, a tooth tip contact position in which the armatures 11 and 12 are in a tooth tip contact state, and the armature 11 , 12 are driven in the axial direction as appropriate between the fully engaged position (hereinafter also simply referred to as the fastening position).

  In order to move the first armature 11 in the axial direction, an axial movement mechanism 20 is provided. The axial movement mechanism 20 is attached to the coil 21 and the permanent magnet 22 that are installed in the immediate vicinity of the outer circumferences of the first and second armatures 11 and 12 and the direction in which the first armature 11 is separated from the second armature 12. There is provided a spring (release force applying means) 23 for applying a release force between the armatures 11 and 12 to release the first and second armatures 11 and 12 from each other.

  A magnetic yoke 24 is provided around the coil 21 and the permanent magnet 22. The yoke 24 is supported by the support member 25 together with the coil 21 and the permanent magnet 22 and is provided on the outer periphery of the first and second armatures 11 and 12.

Support member 25 is formed of a magnetic material, bearing 4a on the outer periphery of the input shaft 1, a cylindrical base portion 25a extending along the rotatably supported via 4b rotation axis line O _1, from the base portion 25a outer flange-like portion 25b extended in the (radial direction), and a cylindrical yoke support portion 25c extending along the outer edge of the flange portion 25b in the rotation axial line O _1.

Yoke 24 comprises a first yoke 24a and a second yoke 24b which is equipped with axially spaced (direction of the rotation axis line _{O 1)} so as to sandwich the coil 21, the first yoke 24a and a second yoke 24b The inside of the facing portion is extended so as to partially surround the coil 21 from the inner peripheral side. The permanent magnet 22 is arranged between the yoke support portion 25c outside the second yoke 24b. Thereby, the magnetic field which penetrates the 1st and 2nd armatures 11 and 12 is formed using the yoke 24 and the supporting member 25.

  This magnetic field is formed according to the position of the armatures 11 and 12 and the energization state of the coil 21. For example, as shown in FIG. 2 (a), if the coil 21 is not energized in a released state in which the tooth tips of the armatures 11 and 12 are separated from each other, the magnetic flux lines caused by the permanent magnet 22 (see the black arrow A1). Is formed. In response to the magnetic flux lines, the first armature 11 is attracted by the magnetic force toward the flange-like portion 25b of the support member 25, and the released state is maintained.

  Here, when the coil 21 is energized to form a magnetic flux line indicated by a two-dot chain line arrow A2 in FIG. 2A, the magnetic force that causes the armatures 11 and 12 by the magnetic flux line formed by the coil 21 to approach each other. The arm 23 overcomes the releasing force of the spring 23 and the magnetic force corresponding to the magnetic flux lines of the permanent magnet 22, and the tooth tips of the meshing teeth 11 a and 12 a of the armatures 11 and 12 are attracted by the magnetic force. Driven to the side.

  In the middle of this, when the armature 11 moves from the release position to the tooth tip contact position, the magnetic flux line indicated by the black arrow A1 in FIG. 2A disappears due to the separation between the armature 11 and the flange-shaped portion 25b, and FIG. ), A magnetic flux line surrounding the coil 21 is formed by the permanent magnet 22 in the illustrated direction (opposite to the release position), and the magnetic force generated by the permanent magnet 22 is between the armatures 11 and 12. It comes to work on the side to be closer. That is, both the magnetic force generated by the magnetic flux lines (see the white arrow A4) formed by the coil 21 and the magnetic force generated by the magnetic flux lines (see the black arrow A3) formed by the permanent magnet 22 drive the armatures 11 and 12 to the fastening position. Acting as an engaging force.

  When the armature 11 is in the tooth tip contact position and the relative phase of the armatures 11 and 12 is adjusted to the position where the meshing teeth 11a and 12a mesh with each other, the armature 11 is brought into the release force of the spring 23 by the above engagement force. It is overcome and driven to the fastening position.

  At this fastening position, even when the energization to the coil 21 is stopped, the magnetic force that causes the armatures 11 and 12 to approach each other by the permanent magnet 22 is used as the release force of the spring 23 as shown by the black arrow A5 in FIG. And the armature 11 is held in the fastening position. Therefore, the armatures 11 and 12 can be held in the fastened state without energizing the coil 21.

  On the other hand, in order to drive the first armature 11 in the fastening position to the release side, the coil 21 is energized in the reverse direction and the magnetic flux lines (see the white arrow A6) are applied as shown in FIG. The magnetic force (refer to the magnetic flux line shown by the black arrow A6) which becomes the release force of the armatures 11 and 12 is generated. The magnetic force (release force) that separates the armatures 11 and 12 formed by the coil 21 overcomes the magnetic force (engagement force) by the permanent magnet 22 in cooperation with the release force of the spring 23, thereby causing the armatures 11 and 12 to move. To act, the first armature 11 is driven from the fastening position to the release position.

  By the way, this apparatus is equipped with a control device 30. The controller 30 includes a position determination unit (position determination unit) 31 that determines the position of the first armature 11 (relative position of the armatures 11 and 12), and the coil 21 based on the determination result of the position determination unit 31. An engagement control unit (engagement control means) 32 for controlling the energization of the first and second armatures 11 and 12 between release and fastening, and the first and second during the switching control. And a failure determination unit (failure determination means) 33 for determining failure of the meshing engagement device 10 from the responses of the armatures 11 and 12. Note that a computer including a memory (ROM, RAM) and a CPU is applied to the control device 30.

The position determination unit 31 determines the position of the first armature 11 based on the detection information of the position sensor 41 and the detection information of the current sensor 42.
The position sensor 41 is an on / off type position sensor that switches on / off of a signal between the release position of the first armature 11 and the tooth tip contact position. As shown in FIG. 3A, the position sensor 41 includes a sensor support 41a fixed to the flange-like portion 25b of the support member 25, and a first armature supported by the sensor support 41a so as to be able to advance and retreat. 11 has a detection body 41b having a tip detection portion 41c that takes an off state in which the first armature 11 does not contact and an on state in which the first armature 11 does not contact.

  The detection body 41b protrudes by receiving an elastic force (see the arrow in FIG. 3B) from the sensor support body 41a, and something contacts the tip detection portion 41c of the detection body 41b and receives contact pressure. Then, the detection body 41b is elastically retracted. Then, in a state where the detection body 41b protrudes most from the sensor support body 41a (see FIG. 3 (a)) without contacting the tip detection portion 41c of the detection body 41b, the position sensor 41 is turned on, and the detection body 41b In a state where something contacts the tip detection unit 41c and the detection body 41b is slightly retracted toward the sensor support body 41a (see the arrow in FIG. 3A), the position sensor 41 is turned off. The signal of the position sensor 41 is set to be turned on and off between the release position of the first armature 11 and the tooth tip contact position.

In the present embodiment, the bearing device 43 is mounted on the tip detection unit 41c.
The bearing device 43, is applied thrust needle bearing, between the sensor-side washer 43a and the armature side washer 43 b, a number of which are equipped with radially with respect to the rotation axis line O ₁ is held by the holder (not shown) A needle bearing 43c is provided. Sensor side washer 43a is coupled to a parallel to the retractable distal detector 41c and the rotation axis line O _1, so that it can advance and retreat integrally with the front edge detecting section 41c, supported by the base portion 25a through the structure of the splines Has been.

  When the first armature 11 is in the fastening position or the tooth tip contact position, the tip sensor 41c does not touch anything, so the position sensor 41 outputs an ON signal. Then, since the first armature 11 comes into contact with the tip detection portion 41c in the process in which the first armature 11 moves from the tooth tip contact position to the release position, the output of the position sensor 41 is turned off from the ON signal. The signal is switched (see the release position shown in FIG. 3B).

  When the first armature 11 comes into contact with the tip detection unit 41c, the first armature 11 normally rotates relative to the support member 25 to which the position sensor 41 is fixed. The sliding contact with the first armature 11 causes friction of the leading end detection unit 41c, but the bearing device 43 can reduce the friction, suppress wear of the leading end detection unit 41c, and durability. Is improved.

With respect to the position of the first armature 11, the position sensor 41 can determine the release position and the fastening position or the tooth tip contact position, but cannot determine the fastening position and the tooth tip contact position. Therefore, focusing on the current flowing through the coil 21, the fastening position and the tooth tip contact position are separated. That is, when the first armature 11 advances to the fastening position, there is a characteristic that the current flowing through the coil 21 (that is, the current value detected by the current sensor 42) decreases for a moment (that is, indicates a drop).
The position determination unit 31 determines the position of the first armature 11 using this characteristic.

  When the position determination unit 31 switches the first armature 11 from the release position to the fastening position, the position determination unit 31 determines that the first armature 11 has moved to the tooth tip contact position when the signal of the position sensor 41 is switched from OFF to ON. Thereafter, when the current value detected by the current sensor 42 shows a drop, it is determined that the first armature 11 has moved to the fastening position. At this time, the position determination unit 31 indicates a drop in the current value when the current value decreases from the maximum value (peak value) by a predetermined amount or more.

  Further, when the position determination unit 31 switches the first armature 11 from the fastening position to the release position, the tooth tip contact position does not occur, and therefore the first armature until the signal of the position sensor 41 switches from on to off. 11 is determined to be in the fastening position, and when the signal of the position sensor 41 is switched from on to off, it is determined that the first armature 11 has moved to the release position.

  In the present embodiment, the first armature 11 is switched from the release position to the fastening position by moving the vehicle from a single engine driving using only the engine as a driving source to a single motor driving or hybrid driving using a motor as a driving source. It is a case to switch to. Therefore, at this time, the engagement control unit 32 first issues a command to the motor control device 50 to start the stopped motor and increase the rotation speed (also referred to as “the number of rotations”). The rotation speed of the armature 11 is made close to the rotation speed of the second armature 12 connected to the drive train side, and then the energization of the coil 21 is controlled to move the first armature 11 from the release position to the fastening position side. Move.

  At this time, when the first armature 11 moves from the release position to the fastening position side, the first and second armatures 11 and 12 are in the first phase unless the relative phases of the first and second armatures 11 and 12 are engaged with each other. The armature 11 is the tooth tip contact position. Therefore, when the position determination unit 31 determines that the first armature 11 has moved to the tooth tip contact position, the engagement control unit 32 issues a command to the motor control device 50 to increase the motor torque, By rotating the first armature 11 relative to the second armature 12, the relative phase position where the meshing teeth 11a and 12a mesh with each other is set. Thereby, the 1st armature 11 moves to a fastening position with the magnetic force by the coil 21. FIG. When the position determination unit 31 determines that the first armature 11 has moved to the fastening position, the engagement control unit 32 ends energization of the coil 21.

  On the other hand, in the present embodiment, the first armature 11 is switched from the fastening position to the release position by moving the vehicle from a single motor drive or a hybrid drive using a motor as a drive source to a single engine drive using only an engine as a drive source. It is a case to switch to. Therefore, at this time, the engagement control unit 32 first issues a command to the motor control device 50, sets the motor torque to 0, controls the energization of the coil 21, and moves the first armature 11 from the fastening position. Move to the release position.

  When the torque of the motor is set to 0, the meshing frictional force of the meshing teeth 11a and 12a of the first and second armatures 11 and 12 is reduced, so that the release force due to the magnetic force of the coil 21 and the release force of the spring 23 The one armature 11 easily moves from the fastening position to the release position. When the position determination unit 31 determines that the first armature 11 has moved from the fastening position to the release position, the engagement control unit 32 issues a command to the motor control device 50 and stops the motor (does not supply power). And energization of the coil 21 is terminated.

The failure determination unit 33 determines the failure of the meshing engagement device 10 from the response of the first armature 11 during the switching control of the position of the first armature 11.
That is, when the first armature 11 is switched from the release position to the fastening position, the failure determination unit 33 causes the engagement control unit 32 so that a magnetic force is generated on the side where the first and second armatures 11 and 12 are approached. Is incapable of engaging when the position determining unit 31 does not determine that the first armature 11 has moved to the fastening position within a predetermined time even if the coil 21 instructs the coil 21 to supply current. Is determined.

  The failure determination unit 33 also switches the engagement control unit 32 so that a magnetic force is generated on the side separating the first and second armatures 11 and 12 when the first armature 11 is switched from the fastening position to the release position. Even if the coil 21 is instructed to supply current, if the position determination unit 31 does not determine that the first armature 11 has moved to the release position within a predetermined time, a failure that cannot be released is assumed. judge. However, in this embodiment, if the meshing of the meshing teeth 11a and 12a is tight, the meshing of the meshing teeth 11a and 12a may not be released even if a release current is input to the coil 21 by controlling the motor to zero torque. Assuming this, if it is not determined that the motor has moved to the release position within a predetermined time, the motor 0 torque control is stopped and the motor torque is increased to the drive side. If it is not determined that it has moved to the release position, it is determined that there is a failure that cannot be released.

  Since the meshing engagement device according to one embodiment of the present invention is configured as described above, for example, as shown in the schematic diagrams of FIGS. 4 and 5 and the flowcharts of FIGS. And the engagement state of the 2nd armature 11 and 12 is switched.

For example, when switching from single engine traveling to single motor traveling or hybrid traveling using a motor as a drive source, the first armature 11 is switched from the release position to the fastening position. At this time, as shown in FIGS. 4 and 6, the coil 21 and the motor are controlled.
In this case, first, as shown in FIG. 4A, the first armature 11 is in the release position, and the leading end detection portion 41c of the position sensor 41 is connected to the first armature 11 via the bearing device 43. The output signal is in a state of 0 (= off) due to contact and pushing.

  In order to switch the first armature 11 from the release position to the fastening position, as shown in FIG. 6, the rotation speed of the first armature 11 is connected to the drive train side while starting the motor and increasing the rotation speed. The rotational speed of the second armature 12 is made closer (step A10). Then, it is determined whether or not the difference α between the output rotational speed (the rotational speed of the second armature 12) and the motor rotational speed (the rotational speed of the first armature 11) is less than a predetermined value P set in advance. (Step A20).

  The meshing teeth 11a of the first and second armatures 11 and 12 in a state where the difference α between the output rotational speed (the rotational speed of the second armature 12) and the motor rotational speed (the rotational speed of the first armature 11) is large. , 12a increases the wear of the meshing teeth 11a, 12a and may cause abnormal noise. From this point of view, the allowable value of the difference α when the meshing teeth 11a, 12a contact A predetermined value P is set. By bringing the meshing teeth 11a and 12a into contact after the difference α is less than the predetermined value P, wear of the meshing teeth 11a and 12a and generation of abnormal noise are also suppressed.

  Until it is determined in step A20 that the difference α is less than the predetermined value P, the process proceeds to step A10 in the next control cycle to increase the motor rotation speed. When it is determined in step A20 that the difference α is less than the predetermined value P, the timer is turned on to start the timer count (step A30), and the coil 21 is input with a fastening current (step A40). Then, it is determined whether the signal of the position sensor 41 is switched from 0 (= off) to 1 (= on) (step A50).

  If the signal from the position sensor 41 is not 1, the process proceeds to Step A110, where it is determined whether or not the timer count value t is larger than the determination reference value t0. The determination reference value t0 is a value for determining an engagement failure. If the meshing engagement device 10 is not broken, the first and second armatures 11 and 12 are normally fastened within a predetermined time if a fastening current is input to the coil 21 and movement toward the engaging side is started. Naturally, the signal of the position sensor 41 switches from 0 to 1 before that. The determination reference value t0 corresponds to this predetermined time.

  If the timer count value t is within the determination reference value t0, the process proceeds to step A50 in the next control cycle to determine whether the signal from the position sensor 41 is 1. If the meshing engagement device 10 has not failed, the signal of the position sensor 41 becomes 1 before the timer count value t becomes larger than the determination reference value t0. In this case, it progresses to step A60 and it is determined from the electric current value whether the 1st and 2nd armatures 11 and 12 were in the fastening state. That is, it is determined whether or not the current value detected by the current sensor 42 indicates a drop. If the current value indicates a drop, it is determined that the first and second armatures 11 and 12 are in the engaged state.

  If the current value does not indicate the engaged state of the first and second armatures 11 and 12, the process proceeds to step A62, and it is determined whether or not the timer count value t is larger than the determination reference value t0. It is determined whether or not the timer count value t is larger than the determination reference value t0. If the timer count value t is within the determination reference value t0, the process proceeds to step A70 and the motor torque is increased.

  As shown in FIG. 4B, the first and second armatures 11 and 12 are not in a fastened state, and the first and second armatures 11 and 12 are in a tooth tip contact state. It can be assumed that the meshing teeth 11a and 12a of the armatures 11 and 12 are rotating at a constant speed with their phases shifted, and this increase in motor torque causes the first and second armatures 11 and 12 to be rotated. A differential rotation can be applied to match the phases of the meshing teeth 11a and 12a. Thereby, the 1st armature 11 and 12a can be made into a fastening state by moving the 1st armature 11 with the fastening force by the magnetic force of the coil 21, and meshing the meshing teeth 11a and 12a. If the timer count value t is within the determination reference value t0, the motor torque is increased every control cycle until the first and second armatures 11 and 12 are in the engaged state.

  As a result, the current value shows a drop, an affirmative determination is made in step A60, the process proceeds to step A80, and the first and second armatures 11 and 12 are engaged as shown in FIG. It is determined that Next, it progresses to step A90 and the fastening current of the coil 21 is turned off. Then, the vehicle travel mode is set to the motor travel mode or the hybrid travel mode (step A100), the timer is turned off, the timer value is reset to 0 (step A150), and the switching control of the meshing engagement device 10 is finished.

  On the other hand, if it is determined in step A110 or step A62 that the timer count value t is greater than the determination reference value t0, the meshing engagement device 10 is incapable of engaging (clutch disengagement in which the clutch is disengaged). It is determined that a failure has occurred (step A120). In this case, the fastening current of the coil 21 is turned off (step A122), the engine running mode is instructed (step A130), and a failure display is performed by a warning lamp in the vehicle (step A140). Then, the timer is turned off, the timer value is reset to 0 (step A150), and the switching control of the meshing engagement device 10 is finished.

On the other hand, when switching from single motor traveling or hybrid traveling using a motor as a drive source to single engine traveling, the first armature 11 is switched from the fastening position to the release position. At this time, as shown in FIGS. 5 and 7, the coil 21 and the motor are controlled.
In this case, at first, as shown in FIG. 5A, the first armature 11 is in the fastening position, and the front end detector 41c of the position sensor 41 does not contact the first armature 11, so that the output signal Is in the state of 1 (= on).

  In order to switch the first armature 11 from the fastening position to the release position, as shown in FIG. 7, zero torque control is performed to reduce the motor torque to zero (step B10). Then, the timer is turned on to start the timer count (step B20), and a release current is input to the coil 21 (step B30). When the torque of the motor is set to 0, the first armature 11 easily moves from the fastening position to the releasing position by the releasing force due to the magnetic force of the coil 21 to which the release current is input and the releasing force of the spring 23.

  Then, it is determined whether the signal of the position sensor 41 has been switched from 1 to 0 (step B40). When the signal of the position sensor 41 switches to 0, the process proceeds to step B90, and it is determined that the first and second armatures 11 and 12 are in the released state, as shown in FIG. Next, proceeding to step B100, the release current of the coil 21 is turned off. Then, the vehicle travel mode is set to the engine travel mode (step B110), the timer is turned off, the timer value is reset to 0 (step B160), and the switching control of the meshing engagement device 10 is finished.

  On the other hand, if the signal from the position sensor 41 remains 1, the process proceeds from step B40 to step B50, and it is determined whether or not the timer count value t is larger than the determination reference value t1. The determination reference value t1 is a value for determining the switching timing of the motor from 0 torque control to control for generating drive side torque. Normally, the first armature 11 moves from the fastening position to the release position within a predetermined time by the zero torque control and the input of the release current, and the signal of the position sensor 41 switches from 1 to 0. Accordingly, the determination reference value t1 is set.

  If the meshing of the meshing teeth 11a and 12a is tight, the meshing of the meshing teeth 11a and 12a is not released even if the motor is controlled to 0 torque and a release current is input to the coil 21, as shown in FIG. 5B. In this case, in some cases, the meshing of the meshing teeth 11a and 12a can be released by generating the motor torque on the drive side. Therefore, if the signal of the position sensor 41 remains 1 even if the timer count value t is larger than the determination reference value t1, the motor 0 torque control is stopped (step B60), and the motor torque is shifted to the drive side. Increase control is performed (step B70).

Then, it is determined whether or not the motor torque Tm has exceeded a preset reference value Tp (step B80). As long as the motor torque Tm does not exceed the reference value Tp, the process proceeds to step B40 in the next control cycle to determine whether the signal of the position sensor 41 has been switched from 1 to 0.
When the signal of the position sensor 41 switches from 1 to 0, the process proceeds to step B90, where it is determined that the first and second armatures 11 and 12 are in the released state, and the same processing as described above is performed (steps B90 and B100). , B160).

  If the signal from the position sensor 41 remains 1, the process proceeds from step B40 to steps B50 and B60 to step B70, where control is performed to increase the motor torque to the drive side. If it is determined in step B80 that the motor torque Tm has exceeded a preset reference value Tp, it is determined that the meshing engagement device 10 has a disengagement failure (a clutch engagement failure in which the clutch fails in the engaged state). (Step B120).

  Then, control is performed to limit the motor rotation speed Nm to less than the upper limit rotation speed Nms (step B130), the coil release current is turned off (step B140), and the vehicle travel mode remains in the motor travel mode or the hybrid travel mode. The timer is turned off (step B150), the timer is turned off, the timer value is reset to 0 (step B160), and the switching control of the meshing engagement device 10 is finished.

  Thus, according to this meshing engagement device, when switching from the release position to the fastening position using the on / off type position sensor 41 and the current sensor 42, from the fastening position to the tooth tip contact position and the release position. When the movement is switched from the fastening position to the release position, any transition from the fastening position to the release position can be detected appropriately without using a linear sensor, and an increase in size of the apparatus can be suppressed.

  Further, the failure determination unit 33 determines an unengageable failure when switching from the release position to the fastening position, and determines a non-releasable failure when switching from the fastening position to the release position, from the response of the position sensor 41 or the current sensor 42. As a result, it is possible to reliably detect a failure that cannot be engaged and a failure that cannot be released in a short time.

  Since the bearing device 43 is mounted on the tip detection unit 41c of the position sensor 41, the position sensor 41 and the first armature 11 rotate relative to each other without hindrance, and friction is caused when the tip detection unit 41c contacts the armature 11. The durability of the position sensor 41 can be ensured.

[Others]
Although the embodiments of the present invention have been described above, the present invention can be implemented by appropriately modifying such embodiments.
For example, in the above embodiment, the bearing device 43 is attached to the tip detection unit 41c of the position sensor 41, but may be omitted if the sliding contact between the tip detection unit 41c and the first armature 11 is smooth. .

  Further, the axial movement mechanism 20 may be any one provided with a coil, a permanent magnet, and a yoke and moving the first armature 11 in the axial direction by controlling the energization of the coil and operating the magnetic field. The present invention is not limited to this.

  Further, in the present embodiment, the meshing engagement device is applied to a location where the motor is connected to or disconnected from the drive train of the hybrid vehicle, but the meshing engagement device is not limited to this and can be applied. .

1 input shaft 2 output gear 10 meshing engagement device (clutch)
11 First armature (first meshing engagement element)
11a meshing teeth of the first armature 11 12 second armature (second meshing engagement element)
12a Meshing teeth of the second armature 12 20 Axial moving mechanism 21 Coil 22 Permanent magnet 23 Spring (release force applying means)
24, 24a, 24b Yoke 25 Support member 30 Control device 31 Position determination unit (position determination means)
32 Engagement control unit (engagement control means)
33 Failure determination unit (failure determination means)
41 Position Sensor 41a Sensor Support 41b Detector 41c Tip Detection Unit 42 Current Sensor 43 Bearing Device

Claims (8)

First and second meshing engagement elements each having meshing teeth, the meshing teeth being arranged to face each other so as to mesh with each other, and rotatably supported by the support member,
A coil, a permanent magnet and a yoke mounted on the outer periphery of the first and second meshing engagement elements;
Release force applying means for applying a release force for operating the first and second meshing engagement elements to the release side between the first and second meshing engagement elements;
By controlling energization to the coil and operating a magnetic field penetrating the first and second meshing engagement elements, the first meshing engagement element is moved in the axial direction using magnetic force, Engagement control means for switching and controlling the first and second meshing engagement elements between full release and full engagement;
As a relative positional relationship between the first and second meshing engagement elements, a complete release position where the respective tooth tips of the meshing teeth are separated from each other, a complete engagement position where the meshing teeth are completely meshed with each other, A meshing engagement device having a tooth tip contact position that is an intermediate position between a release position and the full engagement position and where the tooth tips of the meshing teeth are in contact with each other;
An on / off type position sensor that switches on / off of a signal between the fully released position of the first and second meshing engagement elements and the tooth tip contact position;
A current sensor for detecting a current value of the coil;
When the first and second meshing engagement elements are switched from the fully released position to the fully engaged position, it is determined that the position sensor has moved to the tooth tip contact position when the on / off signal is switched, and the current A meshing engagement device comprising: position determination means for determining that the current value detected by the sensor has moved to the complete engagement position when the current value indicates a drop. When the first and second meshing engagement elements are switched from the complete release position to the complete engagement position, the engagement control means is configured to apply a magnetic force to the side that causes the first and second meshing engagement elements to approach each other. When the position determination means determines that the first and second meshing engagement elements have moved to the fully engaged position, supply current to the coil. The intermeshing engagement device according to claim 1, wherein the stop is instructed to stop. When the first and second meshing engagement elements are switched from the fully released position to the fully engaged position, the magnetic force is generated so that the first and second meshing engagement elements approach each other. Even if the engagement control means instructs the coil to supply a current, the position determination means does not determine that the first and second meshing engagement elements have moved to the complete engagement position. 3. The meshing engagement device according to claim 2, further comprising failure determination means for determining that the failure is impossible. The position determination means determines that when the first and second meshing engagement elements are switched from the complete engagement position to the complete release position, the position sensor has moved to the complete release position when the on / off signal of the position sensor is switched. The meshing engagement device according to any one of claims 1 to 3, wherein: When the first and second meshing engagement elements are switched from the complete engagement position to the complete release position, the engagement control means is configured to apply a magnetic force to the side that separates the first and second meshing engagement elements. When the position determining means determines that the first and second meshing engagement elements have moved to the fully released position, the current supply to the coil is performed. The meshing engagement device according to claim 4, wherein the engagement type engagement device is stopped. When the first and second meshing engagement elements are switched from the fully engaged position to the fully released position, the magnetic force is generated so that the first and second meshing engagement elements are separated from each other. Even if the engagement control means instructs the coil to supply current, if the position determination means does not determine that the first and second meshing engagement elements have moved to the fully released position, an unreleasable failure 6. The meshing engagement device according to claim 5, further comprising failure determination means for determining that The said position determination means determines with having moved to the said complete engagement position from the said tooth-tip contact position, if the said electric current value shows the fall more than the preset reduction amount, The 1st-6th characterized by the above-mentioned. The meshing engagement device according to any one of the above. The support member that supports the coil, permanent magnet, and yoke is configured to rotate in the fully engaged position and to be non-rotatable in the fully released position,
The position sensor is
A sensor support fixed to the support member;
A tip detection unit that is supported by the sensor support body so as to be able to advance and retract and takes an off state in which the first meshing engagement element abuts and an on state in which the first meshing engagement element does not abut. A detector, and
The meshing engagement device according to any one of claims 1 to 7, wherein a bearing device is attached to the tip detection unit.

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