JP2013092211A - Engaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engaging device in which switching to an engaging state can be performed rapidly and shock at teeth collision can be reduced, and which is advantageous for downsizing.SOLUTION: The engaging device 1 has a clutch 10 with a first engaging member 11 having a first tooth alignment 14, and a second engaging member 12 having a second tooth alignment 16 capable of meshing with the first tooth alignment 14, the first and second engaging members being placed to be relatively rotated around a common axis Ax, and by a drive device 20, the clutch 10 is switched to an engaging state in which the first tooth alignment 14 and the second tooth alignment 16 are meshed and a releasing state in which the first tooth alignment 14 and the second tooth alignment 16 are separated, wherein the drive device 20 has a hydraulic cylinder 21 for driving the first engaging member 11 to the direction of the axis Ax. The hydraulic cylinder 21 and the first engaging member 11 are provided with an oil passage 27 whose one end is opened at tip ends of a plurality of teeth 15 formed of the first tooth alignment 14 and the other end is connected to a first operation chamber 24 of the hydraulic cylinder 21.

Description

  The present invention relates to an engagement device that includes a first engagement member and a second engagement member each having a tooth row and meshes the tooth rows of the engagement members in an engaged state.

  Each includes a first engagement member and a second engagement member each having a tooth row, and can be switched between an engagement state in which the tooth rows of these engagement members are engaged with each other and a release state in which the engagement between the tooth rows is released. A configured dog clutch is known. Further, a dog clutch provided with a cylinder mechanism that operates with a working fluid such as a hydraulic cylinder or an air cylinder is known as a state switching mechanism. As such a clutch, when switching the clutch from the disengaged state to the engaged state, first, when the working fluid is supplied to the cylinder mechanism via the low pressure circuit and the sensor detects that the clutch is switched to the engaged state, A clutch that supplies a working fluid to a cylinder mechanism via a high-pressure circuit is known (see Patent Document 1). In addition, there is Patent Document 2 as a prior art document related to the present invention.

JP-A 63-145828 JP 2002-364734 A

  In the clutch of Patent Document 1, it is necessary to provide both a low pressure circuit and a high pressure circuit as a working fluid supply path. For this reason, the clutch device may be increased in size. Moreover, in the clutch of patent document 1, since the pressure of the working fluid supplied to a cylinder mechanism is low until it will be in an engagement state, there exists a possibility that the time taken until engagement members may mesh | engage completely may become long. Furthermore, in the clutch of Patent Document 1, if the pressure of the working fluid supplied through the low pressure circuit is not set appropriately, there is a possibility that the shock when the teeth of the engaging members collide with each other is increased.

  Therefore, an object of the present invention is to provide an engagement device that can quickly switch to an engaged state, reduce a shock at the time of a tooth collision, and is advantageous for downsizing.

  The engagement device of the present invention is formed of a first engagement member having a first tooth row formed by a plurality of teeth arranged in the circumferential direction, and a plurality of teeth arranged in the circumferential direction, and A second engagement member having a second tooth row that can mesh with the first tooth row is disposed so as to be relatively rotatable around a common axis, and the first engagement member is in the direction of the axis. The clutch means is moved between the first tooth row and the second tooth row by moving the first engagement member in the direction of the axis by the drive means. In the engagement device that switches between the meshing engagement state and the release state in which the first tooth row and the second tooth row are separated from each other, the drive means is provided in a freely reciprocating manner within the cylinder body and the cylinder body. A piston coupled to the first engagement member, A cylinder mechanism for switching the clutch means from the disengaged state to the engaged state by supplying a working fluid to a working chamber formed in the main body and driving the piston; A working fluid passage having an opening in a surface facing the second engaging member of at least some of the plurality of teeth to be formed and the other end connected to the working chamber is provided. 1).

  According to the engagement device of the present invention, the working fluid supplied to the working chamber is sent to a part of the teeth of the first tooth row via the working fluid passage, and the part of the teeth is directed to the second engaging member. Can be injected. Thereby, for example, when the teeth of the first engagement member and the teeth of the second engagement member collide with each other in the axial direction, one end of the working fluid passage of the teeth of the first engagement member is opened. A working fluid is interposed between the teeth of the second engaging member and the teeth of the second engaging member. Therefore, the shock at the time of the collision can be reduced with the working fluid. Further, since the working fluid is interposed between the teeth, the frictional force between the teeth can be reduced. As a result, it is possible to prevent the first engagement member and the second engagement member from rotating while the tips of the teeth are stuck to each other by friction, so that the teeth of the first dentition are replaced with the teeth of the second dentition. Can guide quickly between teeth. Therefore, switching to the engaged state can be performed quickly. Furthermore, in the engagement device of the present invention, it is not necessary to provide a low pressure circuit in the path for supplying the working fluid to the cylinder mechanism. Further, since the working fluid is ejected from the teeth of the first engagement member, there is no need to provide a separate path for supplying the working fluid between the first engagement member and the second engagement member. Therefore, the apparatus can be reduced in size.

  In one form of the engagement device of the present invention, it is detected whether or not the first engagement member has moved to a contact position where the tooth tip of the first tooth row contacts the tooth tip of the second tooth row. Position detecting means, flow rate adjusting means capable of adjusting the flow rate of the working fluid supplied to the working chamber, and the position detecting means when the clutch means is switched from the disengaged state to the engaged state. And a flow rate control means for controlling the flow rate adjusting means to increase the flow rate of the working fluid supplied to the working chamber when it is detected that the one engaging member has moved to the contact position. (Claim 2). In this embodiment, when the first engagement member moves to the contact position, the flow rate of the working fluid increases. Therefore, when the teeth of the first engagement member and the teeth of the second engagement member collide with each other from the axial direction, one of the teeth of the first engagement member is open at one end of the working fluid passage. And the amount of the working fluid interposed between the teeth of the second engaging member can be increased. As a result, the frictional force between the teeth can be further reduced, so that the switching to the engaged state can be performed more quickly. Further, since the flow rate of the working fluid does not increase until the first engagement member reaches the contact position, it is possible to suppress the wasteful ejection of the working fluid from the teeth of the first engagement member.

  In an embodiment of the engagement device of the present invention, torque applying means capable of applying a torque around the axis to the first engagement member or the second engagement member, and the clutch means from the released state Estimating whether or not the first engagement member has moved to a contact position where the tip of the tooth of the first dentition and the tip of the tooth of the second dentition contact each other when being switched to the engaged state; Torque control means for controlling the torque application means so that torque is applied to the first engagement member or the second engagement member when it is estimated that the first engagement member has moved to the contact position; (Claim 3). In this embodiment, when the first engagement member moves to the contact position, torque is applied to the first engagement member or the second engagement member, so that the difference in rotational speed between these engagement members becomes large. Therefore, even if the first engagement member moves to the contact position and the teeth of the first engagement member and the teeth of the second engagement member collide with each other from the axial direction, the teeth of the first dentition are moved after the collision. It is possible to quickly guide between the teeth of the second dentition. Therefore, switching to the engaged state can be performed more quickly.

  In one form of the engagement device of the present invention, it is detected whether or not the first engagement member has moved to a contact position where the tooth tip of the first tooth row contacts the tooth tip of the second tooth row. Position detecting means, torque applying means capable of applying a torque around the axis to the first engaging member or the second engaging member, and the clutch means being switched from the released state to the engaged state. So that when the position detecting means detects that the first engagement member has moved to the contact position, torque is applied to the first engagement member or the second engagement member. Torque control means for controlling the torque application means may further be provided. According to this aspect, since the difference between the rotation speed of the first engagement member and the rotation speed of the second engagement member can be increased when the first engagement member moves to the contact position, switching to the engagement state is performed. Can be done more quickly. In this embodiment, since the position detecting means detects whether or not the first engagement member has moved to the contact position, even if the thrust of the piston changes due to a disturbance or the like, the first engagement member or Torque can be applied to the second engagement member.

  As described above, according to the engagement device of the present invention, when the teeth of the first engagement member and the teeth of the second engagement member collide with each other from the axial direction, the first engagement member A working fluid is interposed between at least some of the teeth and the teeth of the second engagement member. Therefore, the shock at the time of collision can be reduced by the working fluid. In addition, since the frictional force between the teeth can be reduced, the teeth of the first dentition can be quickly guided between the teeth of the second dentition. Therefore, switching to the engaged state can be performed quickly. Furthermore, according to the engagement device of the present invention, it is not necessary to provide a plurality of working fluid supply paths, so that the device can be miniaturized.

The figure which showed typically a part of power transmission device of the hybrid vehicle to which the engagement apparatus which concerns on the 1st form of this invention was applied. The figure which showed the engagement state of the clutch of FIG. The figure which expands and shows a part of clutch and a drive device. The figure which expands and shows a part of clutch and drive device at the time of an engagement state. The figure which expands and shows a part of clutch and a drive device when the front-end | tip of the tooth | gear of a 1st engagement member and the front-end | tip of the tooth | gear of a 2nd engagement member collide. The figure which expands and shows a part of clutch and a drive device when parts other than the front-end | tip of the tooth | gear of a 1st engagement member and the tooth | gear 15 of a 2nd engagement member collide. The figure which expands and shows a part of clutch and a drive device when switching the clutch from an engagement state to a releasing state. The flowchart which shows the engagement control routine which a control apparatus performs with a 1st form. The flowchart which shows the constant flow control routine which a control apparatus performs. The flowchart which shows the engagement control routine which a control apparatus performs in the engagement apparatus which concerns on the 2nd form of this invention. The flowchart which shows the engagement control routine which a control apparatus performs in the engagement apparatus which concerns on the 3rd form of this invention. The figure which expands and shows a part of clutch of the engagement apparatus which concerns on the 4th form of this invention, and a drive device. The figure which expands and shows a part of clutch and drive device when a 1st engagement member exists in a contact position. The figure which expands and shows a part of clutch and a drive device when a 1st engagement member exists in an engagement position. The flowchart which shows the engagement control routine which a control apparatus performs in a 4th form. The flowchart which shows the modification of the engagement control routine which a control apparatus performs in a 4th form. The figure which expands and shows a part of clutch of the engagement apparatus which concerns on the 5th form of this invention, and a drive device. The flowchart which shows the engagement control routine which a control apparatus performs in a 5th form. The figure which expands and shows a part of clutch of the engaging device of the 1st modification of this invention, and a drive device. The figure which expands and shows a part of clutch and drive device in the engagement state in a 1st modification. The figure which expands and shows a part of clutch and a drive device when the tooth-tip surface of the tooth | gear of a 1st engagement member and the tooth-tip surface of the tooth | gear of a 2nd engagement member collide in the 1st modification. The figure which expands and shows a part of clutch of the engaging apparatus of the 2nd modification of this invention, and a drive device. The figure which expands and shows a part of clutch and a drive device when switching from the engagement state to the releasing state in the 2nd modification.

(First form)
1 and 2 schematically show a part of a power transmission device for a hybrid vehicle in which an engagement device according to a first embodiment of the present invention is incorporated. The engagement device 1 is incorporated in the power transmission device 2 as one of devices for realizing a shift of the hybrid vehicle. The detailed structure such as the overall configuration of the power transmission device 2 is not directly related to the gist of the present invention, and thus the description thereof is omitted.

  The engagement device 1 includes a clutch 10 as a clutch means and a drive device 20 as a drive means for switching the state of the clutch 10. The clutch 10 is configured as a dog clutch, and is disposed in a power transmission path from the motor / generator (MG) 3 of the power transmission device 2 to the axle shaft 4. The clutch 10 includes a first engagement member 11 attached to the rotation shaft 5 connected to the MG3 side, and a second engagement member 12 attached to the rotation shaft 6 connected to the axle shaft 4 side. Since the rotary shafts 5 and 6 are arranged coaxially, the engaging members 11 and 12 are arranged so as to be relatively rotatable around a common axis Ax. The rotation shaft 5 on the MG3 side is supported in a state of being movable in the axis Ax direction, and the rotation shaft 5 is driven in the axis Ax direction together with the first engagement member 11 by the drive device 20. The second engagement member 12 is supported in a state in which it cannot move in the axial direction Ax. The rotation shaft 5 is provided with a first rotation speed sensor 7 that outputs a signal corresponding to the rotation speed of the rotation shaft 5. The rotation shaft 6 is provided with a second rotation speed sensor 8 that outputs a signal corresponding to the rotation speed of the rotation shaft 6.

  The first engagement member 11 has a first tooth row 14 in which a plurality of teeth 13 are arranged in the circumferential direction. The second engagement member 12 has a second tooth row 16 in which a plurality of teeth 15 are arranged in the circumferential direction. The second tooth row 16 can be engaged with the first tooth row 14, that is, formed so that the teeth 13 of the first tooth row 14 can enter between the teeth 15 and 15. As shown in FIG. 1, the teeth 13 of the first tooth row 14 project in the direction of the axis Ax toward the second engagement member 12. The teeth 15 of the second tooth row 16 protrude toward the first engagement member 11 in the direction of the axis Ax. In the clutch 10, the first engagement member 11 moves to a position where the first tooth row 14 and the second tooth row 16 are separated from each other as shown in FIG. To switch to the released state. In this released state, power transmission from the MG3 side to the axle shaft 4 side is interrupted. When the first engagement member 11 and the second engagement member 12 are brought closer to each other by the drive device 20 from this released state, the first engagement member 11 is moved to the first tooth of the first engagement member 11 as shown in FIG. The row 10 and the second tooth row 16 of the second engagement member 12 are moved to a position where the row 14 and the second tooth row 16 are engaged with each other (hereinafter sometimes referred to as an engagement position), and the clutch 10 is engaged. As a result, the first engagement member 11 and the second engagement member 12 are coupled, and the power on the MG3 side is transmitted to the axle shaft 4 side via the clutch 10.

  FIG. 3 shows an enlarged view of a part of the clutch 10 and the drive device 20. As shown in this figure, the tips of the teeth 13 and 15 of the engaging members 11 and 12 are formed flat. Moreover, the both ends of the tips of the teeth 13 and 15 are chamfered obliquely. The drive device 20 includes a hydraulic cylinder 21 as a cylinder mechanism. The hydraulic cylinder 21 is a well-known double-acting hydraulic cylinder, and includes a cylinder body 22 and a piston 23 that is reciprocally inserted into the cylinder body 22. The piston 23 divides the inside of the cylinder body 22 into a first working chamber 24 and a second working chamber 25. A rod 26 is connected to the piston 23 so as to move integrally. The other end of the rod 26 is connected to the first engagement member 11. In the hydraulic cylinder 21, when oil is supplied to the first working chamber 24, the piston 23 moves downward in the figure, and the rod 26 projects from the cylinder body 22. On the other hand, when oil is supplied to the second working chamber 25, the piston 23 moves upward in this figure, and the rod 26 moves backward into the cylinder body 22.

  As shown in this figure, the first engaging member 11 and the hydraulic cylinder 21 are operated such that one end is opened at the tip of each tooth 13 of the first tooth row 14 and the other end is connected to the first working chamber 24. An oil passage 27 is provided as a fluid passage. One end of the oil passage 27 is open to the surface of each tooth 13 facing the second engagement member 12. The oil passage 27 is provided so that the flow passage cross-sectional area has a sufficiently small value with respect to the area of the pressure receiving surface 23 a of the piston 23.

  The drive device 20 includes a supply device 30 for supplying oil to the working chambers 24 and 25 of the hydraulic cylinder 21. The supply device 30 includes an oil pump 31 and a supply passage 32 that supplies the oil discharged from the oil pump 31 to the hydraulic cylinder 21. The oil pump 31 is a well-known one having an electric motor as a power source. The oil pump 31 pumps oil from an oil tank (not shown) and discharges it to the supply passage 32. The supply passage 32 is provided with a first valve 33 and a second valve 34. In addition, an accumulator 35 is provided in the supply passage 32. The accumulator 35 is a known one that can store oil at a high pressure. The first valve 33 is configured to be switchable between an open state in which the accumulator 35 and the supply passage 32 communicate with each other and a closed state in which the accumulator 35 is disconnected from the supply passage 32.

  The supply passage 32 branches into a first supply passage 36 and a second supply passage 37 downstream of the first valve 33. The first supply passage 36 is connected to the first working chamber 24. The second supply passage 37 is connected to the second working chamber 25. The second valve 34 is provided at a branch point where the supply passage 32 branches into a first supply passage 36 and a second supply passage 37. A return passage 38 for returning oil to an oil tank (not shown) is connected to the second valve 34. The second valve 34 selectively switches the supply destination of the oil sent from the oil pump 31 or the accumulator 35 to the first working chamber 24 or the second working chamber 25. At this time, the second valve 34 connects the working chamber that was not selected as the oil supply destination to the return passage 38. Thus, the oil in the other working chamber can be returned to the oil tank while supplying oil to one working chamber of the first working chamber 24 or the second working chamber 25. As shown in this figure, the first supply passage 36 is provided with a flow rate sensor 39 that outputs a signal corresponding to the flow rate of oil flowing through the first supply passage 36.

  The operation of the engagement device 1 will be described with reference to FIGS. Note that the arrow R in these drawings indicates the rotation direction of the second engagement member 12. In this engagement device 1, when the clutch 10 is switched from the released state to the engaged state, the second valve 34 is controlled to supply oil to the first working chamber 24 as indicated by the arrow Fo1 in FIG. As a result, the hydraulic pressure indicated by the arrow P <b> 1 acts on the pressure receiving surface 23 a of the piston 23, and the first engagement member 11 moves toward the second engagement member 12 as indicated by the arrow F <b> 1. At this time, a part of the oil in the first working chamber 24 is sent to each tooth 13 of the first engaging member 11 through the oil passage 27 as indicated by the arrow Fo2, and each part as shown by the arrow Fo3. It ejects from the tip of the tooth 13. In addition, since the flow passage cross-sectional area of the oil passage 27 is sufficiently small with respect to the area of the pressure receiving surface 23a, the amount of oil ejected from the tip of each tooth 13 is sufficiently small. Thus, in order to switch the clutch 10 from the released state to the engaged state, the first working chamber 24 corresponds to the working chamber of the present invention.

  Thereafter, the first engaging member 11 moves toward the second engaging member 12 while injecting oil from the tip of each tooth 13. As shown in FIG. 4, when the clutch 10 is switched to the engaged state, the oil is ejected toward the second engagement member 12, so that the collision speed of the first engagement member 11 can be reduced. . When the tip of the tooth 13 of the first tooth row 14 collides with the tip of the tooth 15 of the second tooth row 16 when the clutch 10 is switched to the engaged state as shown in FIG. , 15 is injected with oil. In such a case, since the pressure in the first working chamber 24 increases, the amount of oil ejected from the tip of each tooth 13 increases. As a result, the frictional force between the teeth 13 of the first tooth row 14 and the teeth 15 of the second tooth row 16 is reduced. Therefore, for example, by inputting torque to the first engagement member 11 or the second engagement member 12, such a state can be quickly eliminated. Thereby, it can suppress that the 1st engagement member 11 and the 2nd engagement member 12 rotate in the state shown in this figure. As shown in FIG. 6, when the portion other than the tip of the tooth 13 of the first tooth row 14 and the tooth 15 of the second tooth row 16 collide, the amount of oil ejected from the tip of each tooth 13 is small. Maintained. In this case, the thrust of the piston 23 can be kept high. Therefore, the first tooth row 14 and the second tooth row 16 can be quickly meshed after the collision as indicated by the arrow F2 in this figure.

  When the clutch 10 is switched from the engaged state to the released state, oil is supplied to the second working chamber 25 as indicated by an arrow Fo4 in FIG. As a result, the hydraulic pressure indicated by the arrow P2 acts on the piston 23, and the piston 23 is driven upward in this figure. Thereby, the 1st engagement member 11 moves to a releasing position, and the clutch 10 switches to a releasing state.

  The operation of the driving device 20 is controlled by the control device 40. The control device 40 is configured as a computer unit including a microprocessor and peripheral devices such as RAM and ROM necessary for its operation. For example, when a predetermined engagement condition for switching the clutch 10 from the released state to the engaged state is satisfied, the control device 40 supplies the oil pump 31 and the first valve so that oil is supplied to the first working chamber 24. The operation of 33 and the second valve 34 is controlled. The predetermined engagement condition is established when, for example, it is necessary to transmit power between the rotating body to which the first engaging member 11 is connected and the rotating body to which the second engaging member 12 is connected. It is determined. The control device 40 controls operations of the MG 3 and the like in addition to the drive device 20. Various sensors for acquiring information related to the control of the engagement device 1 are connected to the control device 40. For example, a flow rate sensor 39 is connected to the control device 40. In addition, the first rotation speed sensor 7 and the second rotation speed sensor 8 are also connected to the control device 40. In addition to this, various sensors are connected to the control device 40, but they are not shown.

  FIG. 8 shows an engagement control routine that is repeatedly executed by the control device 40 at predetermined intervals in order to control the operation of the drive device 20. In addition, the control device 40 repeatedly executes a plurality of control routines at predetermined intervals. This engagement control routine is executed in parallel with the other control routines.

  In this control routine, the control device 40 first determines whether or not a predetermined engagement condition is satisfied in step S11. For example, it is determined that the engagement condition is satisfied in the case described above. If it is determined that the engagement condition is not established, the current control routine is terminated. On the other hand, when it is determined that the engagement condition is satisfied, the process proceeds to step S <b> 12, and the control device 40 starts supplying oil to the first working chamber 24. Specifically, when the oil pump 31 is stopped, the oil pump 31 is operated. Further, the state of the second valve 34 is switched so that the oil supply destination is the first working chamber 24. Further, when the oil in the accumulator 35 needs to be supplied to the first working chamber 24, the first valve 33 is switched to the open state. As a result, the first engaging member 11 starts moving toward the second engaging member 12.

  In the next step S13, the control device 40 resets the timer value to 0, and then starts counting the timer. In subsequent step S14, the control device 40 performs constant flow rate control. FIG. 9 shows a control routine executed by the constant flow rate control. In this control routine, the control device 40 first acquires the flow rate of oil supplied to the first working chamber 24 based on the output signal of the flow rate sensor 39 in step S21 (hereinafter sometimes referred to as supply flow rate). . In the next step S22, the control device 40 determines whether or not the supply flow rate is less than a lower limit value of a preset target flow rate range. For example, a flow rate range in which the hydraulic cylinder 21 can be appropriately operated is set as the target flow rate range. Therefore, the target flow rate range is appropriately set according to the inner diameter of each working chamber 24, 25 of the hydraulic cylinder 21, the maximum stroke amount, and the like. If it is determined that the supply flow rate is less than the lower limit value of the target flow rate range, the process proceeds to step S23, and the control device 40 increases the supply flow rate. The supply flow rate may be increased by increasing the number of rotations of the electric motor of the oil pump 31, for example. Further, when the first valve 33 is in the closed state, the supply flow rate may be increased by switching to the open state and introducing the oil stored in the accumulator 35 into the supply passage 32. At this time, the supply flow rate may be increased by a predetermined amount set in advance, for example. Further, the increase amount may be calculated according to the difference between the supply flow rate and the lower limit value of the target flow rate range, and the supply flow rate may be increased by the calculated increase amount. After increasing the supply flow rate, the process returns to step S21.

  On the other hand, if it is determined that the supply flow rate is greater than or equal to the lower limit value of the target flow rate range, the process proceeds to step S24, and the control device 40 determines whether or not the supply flow rate is greater than the upper limit value of the target flow rate range. When it is determined that the supply flow rate is larger than the upper limit value of the target flow rate range, the process proceeds to step S25, and the control device 40 decreases the supply flow rate. The supply flow rate may be reduced by, for example, reducing the rotational speed of the electric motor of the oil pump 31. At this time, the supply flow rate may be reduced, for example, by a predetermined amount. Alternatively, the amount of decrease may be calculated according to the difference between the supply flow rate and the upper limit value of the target flow rate range, and the supply flow rate may be decreased by the calculated decrease amount. After decreasing the supply flow rate, the process returns to step S21. On the other hand, if it is determined that the supply flow rate is less than or equal to the upper limit value of the target flow rate range, the current control routine is terminated.

  Returning to FIG. 8, the description of the engagement control routine will be continued. In the next step S15, the control device 40 determines whether or not the timer value is less than a predetermined engagement target time. As the engagement target time, for example, when oil having a flow rate within a target flow rate range is supplied to the hydraulic cylinder 21, the first engagement member 11 moves the teeth 13 and the second tooth row 16 of the first tooth row 14 from the release position. When the teeth 15 face each other in the direction of the axis Ax, as shown in FIG. 5, the positions where the tips of the teeth 13 of the first tooth row 14 and the tips of the teeth 15 of the second tooth row 16 are in contact ( Hereinafter, the time required to move to the contact position may be set. If it is determined that the timer value is less than the engagement target time, the process returns to step S14, and steps S14 and S15 are repeated until the timer value becomes equal to or greater than the engagement target time. On the other hand, when it is determined that the timer value is equal to or greater than the engagement target time, the process proceeds to step S16, and the control device 40 performs constant flow control. Also in step S16, the constant flow rate control routine shown in FIG. 9 is executed. In the next step S <b> 17, the control device 40 executes torque input control for inputting torque from the MG 3 to the first engagement member 11. In the following step S18, the control device 40 performs constant flow rate control. Also in this step S18, the constant flow rate control routine shown in FIG. 9 is executed.

  In the next step S19, the control device 40 determines whether or not the engagement of the clutch 10 is completed, that is, whether or not the clutch 10 is switched to the engaged state. Whether or not the engagement of the clutch 10 has been completed may be determined based on, for example, the stroke amount of the rod 26 of the hydraulic cylinder 21. Further, a position sensor that outputs an output signal when the first engagement member 11 moves to the engagement position shown in FIG. 2 is provided, and it is determined whether or not the engagement is completed based on the signal of the position sensor. May be. When it is determined that the engagement is not completed, the process returns to step S18, and the processes of steps S18 and S19 are repeated until the engagement is completed. On the other hand, if it is determined that the engagement is completed, the current control routine is terminated.

  As described above, in the engagement device 1 according to the first embodiment, since the oil passage 27 is provided in the first engagement member 11 and the hydraulic cylinder 21, the clutch 10 is switched from the released state to the engaged state. The oil can be ejected from the tips of the teeth 13 of the first tooth row 14. As a result, the collision speed of the first engagement member 11 immediately before the clutch 10 is switched to the engaged state can be reduced, so that the shock when the first engagement member 11 and the second engagement member 12 are engaged is weakened. be able to. Therefore, noise and vibration when the clutch 10 is engaged can be suppressed.

  Moreover, in this engagement apparatus 1, when the front-end | tip of the tooth | gear 13 of the 1st tooth row 14 and the front-end | tip of the tooth | gear 15 of the 2nd tooth row 16 collide as shown in FIG. The frictional force between the two can be reduced with oil. As a result, the teeth 13 of the first tooth row 14 can be quickly guided between the teeth 15 of the second tooth row 16. Therefore, the clutch 10 can be quickly switched to the engaged state. In addition, since there is oil between the teeth 13 of the first tooth row 14 and the teeth 15 of the second tooth row 16 at the time of the collision, the shock when these teeth 13 and 15 collide can be weakened. it can. As shown in FIG. 6, when the portion other than the tip of the tooth 13 of the first tooth row 14 and the tooth 15 of the second tooth row 16 collide, the thrust of the piston 23 is maintained at a high level. 10 can be quickly switched to the engaged state.

  Further, in the engagement device 1, oil is ejected from the teeth 13 of the first engagement member 11. Therefore, it is not necessary to provide a path for supplying oil between the first engagement member 11 and the second engagement member 12 separately from the supply passage 32. Therefore, the apparatus can be reduced in size.

  In the engagement device 1, when the clutch 10 is switched from the released state to the engaged state, the supply flow rate is maintained at a flow rate within the target flow rate range until the clutch 10 is switched to the engaged state. Therefore, even when there is no rotational speed difference between these engaging members 11 and 12, such as when both the first engaging member 11 and the second engaging member 12 are stopped, the first engaging member 11 By applying torque to the clutch 10, the clutch 10 can be quickly switched to the engaged state. Since the supply flow rate is adjusted by the oil pump 31 and the accumulator 35 as described above, these correspond to the flow rate adjusting means of the present invention.

(Second form)
An engagement device according to a second embodiment of the present invention will be described with reference to FIG. In this embodiment, FIGS. 1 to 7 are referred to for the clutch 10 and the driving device 20. FIG. 10 shows an engagement control routine executed by the control device 40 in this embodiment. This control routine is also repeatedly executed at predetermined intervals in parallel with a plurality of other control routines executed by the control device 40, similarly to the engagement control routine of the first embodiment. In this control routine, the same processes as those in the first embodiment of the engagement control routine are denoted by the same reference numerals and description thereof is omitted.

  In the control routine of FIG. 10, the control device 40 first determines whether or not a predetermined engagement condition is satisfied in step S11. If it is determined that the engagement condition is not established, the current control routine is terminated. On the other hand, if it is determined that the engagement condition is satisfied, the process proceeds to step S31, and the control device 40 determines the absolute value of the difference between the rotation speed of the first engagement member 11 and the rotation speed of the second engagement member 12 (hereinafter, It may be referred to as “rotational speed difference”). The rotation speed difference may be calculated based on the output signal of the first rotation speed sensor 7 and the output signal of the second rotation speed sensor 8. If it is determined that the rotational speed difference is 0, the process proceeds to step S32, and the control device 40 performs rotational speed control for rotating the first engagement member 11 in MG3. However, if the rotational speed difference is excessively large, the engagement of the clutch 10 is hindered. Therefore, the first engagement member 11 is rotated at a rotation speed that does not hinder the engagement in this rotation speed control. Then, it returns to step S31.

  On the other hand, if it is determined that the rotational speed difference is greater than 0, the process proceeds to step S <b> 12, and the control device 40 starts supplying oil to the first working chamber 24. In the next step S19, the control device 40 determines whether or not the clutch 10 is switched to the engaged state, and repeatedly executes this process until the clutch 10 is switched to the engaged state. If it is determined that the engagement is complete, the current control routine is terminated.

  In the second mode, the clutch 10 is switched from the released state to the engaged state in a state where there is a difference in the rotational speed. Therefore, as shown in FIG. 5, even if the tip of the tooth 13 of the first tooth row 14 hits the tip of the tooth 15 of the second tooth row 16, the tooth 13 of the first tooth row 14 is replaced with the tooth 15 of the second tooth row 16. It can be quickly guided between the teeth 15. Therefore, the clutch 10 can be quickly switched to the engaged state.

(Third form)
An engagement device according to a third embodiment of the present invention will be described with reference to FIG. In this embodiment, FIGS. 1 to 7 are referred to for the clutch 10 and the driving device 20. FIG. 11 shows an engagement control routine executed by the control device 40 in this embodiment. This control routine is also repeatedly executed at predetermined intervals in parallel with a plurality of other control routines executed by the control device 40, similarly to the engagement control routine of the first embodiment. In this control routine, the same processes as those in the first embodiment of the engagement control routine are denoted by the same reference numerals and description thereof is omitted.

  In the control routine of FIG. 11, the control device 40 first determines whether or not a predetermined engagement condition is satisfied in step S11. If it is determined that the engagement condition is not established, the current control routine is terminated. On the other hand, if it is determined that the engagement condition is satisfied, the process proceeds to step S41, and the control device 40 calculates the first determination value t1 and the second determination value t2. An estimated value of the time required for the first engagement member 11 to move from the release position to the contact position is set as the first determination value t1. The first determination value t1 is calculated by the following equation (1), for example.

  In this equation (1), F (N) represents the thrust of the piston 23, and δ1 (m) represents the tips of the teeth 13 of the first tooth row 14 and the tips of the teeth 15 of the second tooth row 16 in the released state. The clearance between is shown. M (kg) represents the total value of the masses of the first engagement member 11, the piston 23, and the rod 26, and D (N) represents sliding resistance. C1 represents a matching constant.

  The second determination value t2 is set to a value obtained by adding the adaptation constant C2 to the estimated time required for the first engagement member 11 to move from the contact position to the engagement position. In addition, what is necessary is just to calculate the estimated value of the time required for the 1st engagement member 11 to move from a contact position to an engagement position using Formula (1) mentioned above. At this time, instead of δ1, a distance δ2 (m) by which the tip of the tooth 13 moves until the first engagement member 11 moves from the contact position to the engagement position may be used.

  In the next step S <b> 12, the control device 40 starts supplying oil to the first working chamber 24. In subsequent step S42, the control device 40 resets the first timer and then starts counting the first timer. Thereafter, in step S43, the control device 40 determines whether or not the value of the first timer is greater than or equal to the first determination value t1. This process is repeatedly executed until the value of the first timer becomes equal to or greater than the first determination value t1. On the other hand, when the value of the first timer is equal to or greater than the first determination value t1, the process proceeds to step S44, and the control device 40 resets the second timer and then starts counting the second timer. In subsequent step S45, the control device 40 starts torque input control. In this torque input control, torque is input from the MG 3 to the first engagement member 11 as in step S17 of FIG. In the next step S46, the control device 40 determines whether or not the value of the second timer is greater than or equal to the second determination value t2. This process is repeatedly executed until the value of the second timer becomes equal to or greater than the second determination value t2. When the value of the second timer becomes equal to or greater than the second determination value t2, the process proceeds to step S47, and the control device 40 ends the torque input control. Thereafter, the current control routine is terminated.

  In the third embodiment, it is estimated whether or not the first engagement member 11 has reached the contact position. When it is determined that the first engagement member 11 has reached the contact position, the first engagement member 11 is Torque is input to the first engagement member 11 until it moves to the engagement position. As a result, a rotational speed difference can be generated, so that the teeth 13 of the first tooth row 14 can be quickly guided between the teeth 15 and 15 of the second tooth row 16. In this embodiment, torque may be input to the first engagement member 11 only during a period until the first engagement member 11 moves from the contact position to the engagement position. Therefore, energy consumed when switching the clutch 10 to the engaged state can be reduced. In this form, control for maintaining the rotational speed difference is not required. Therefore, when the tooth 13 of the first tooth row 14 enters between the tooth 15 and the tooth 15 of the second tooth row 16 and does not cause the rotation speed difference, the first rotation is suddenly attempted to cause the rotation speed difference. The torque input to the 1 engaging member 11 is not increased. Therefore, it can suppress that a shock generate | occur | produces at the time of switching to an engagement state.

  Note that MG3 corresponds to the torque applying means of the present invention by inputting torque to the first engaging member 11 in this way. Further, by executing the engagement control routine of FIG. 11, the control device 40 functions as the torque control means of the present invention.

(4th form)
An engagement device 1 according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 12 is a view corresponding to FIG. 3 of the first embodiment, and shows a part of the clutch 10 and the hydraulic cylinder 21 of this embodiment in an enlarged manner. In this figure, the supply device 30 is not shown. As shown in this figure, this embodiment is different from the above-described embodiment in that the first position sensor 51 and the second position sensor 52 are provided, and is otherwise the same as the above-described embodiment. Therefore, the same reference numerals are given to the same parts as those described above, and the description is omitted.

  As shown in this figure, the first position sensor 51 and the second position sensor 52 are provided on the side of the path when the first engagement member 11 moves from the release position to the engagement position. As shown in FIG. 13, the first position sensor 51 is provided so as to detect the detection portion 11 a provided on the first engagement member 11 when the first engagement member 11 moves to the contact position. Therefore, the first position sensor 51 corresponds to the position detection means of the present invention. On the other hand, the second position sensor 52 is provided so as to detect the detection unit 11a when the first engagement member 11 moves to the engagement position as shown in FIG. As shown in these drawings, the first position sensor 51 and the second position sensor 52 are connected to the control device 40. The first position sensor 51 and the second position sensor 52 both output an on signal when the detection unit 11a is detected, and output an off signal when the detection unit 11a is not detected.

  FIG. 15 shows an engagement control routine executed by the control device 40 in this embodiment. This control routine is also repeatedly executed at predetermined intervals in parallel with a plurality of other control routines executed by the control device 40, similarly to the engagement control routine of the first embodiment. In this control routine, the same processes as those in the above-described engagement control routines are denoted by the same reference numerals, and description thereof is omitted.

  In this control routine, the control device 40 first determines whether or not a predetermined engagement condition is satisfied in step S11. If it is determined that the engagement condition is not satisfied, the current control routine is terminated. On the other hand, when it is determined that the engagement condition is satisfied, the process proceeds to step S <b> 12, and the control device 40 starts supplying oil to the first working chamber 24.

  In the next step S51, the control device 40 determines whether or not the output signal of the first position sensor 51 is on. If the output signal of the first position sensor 51 is off, step S51 is repeatedly executed until the output signal is switched on. On the other hand, if it is determined that the output signal of the first position sensor 51 is on, the process proceeds to step S52, and the control device 40 increases the supply flow rate by a predetermined amount. The supply flow rate may be increased using the oil pump 31 or the accumulator 35 as described above. In subsequent step S17, the control device 40 executes torque input control.

  In the next step S53, the control device 40 determines whether or not the engagement of the clutch 10 has been completed. This determination is made based on the output signal of the second position sensor 52, and it is determined that the engagement is completed when the output signal of the second position sensor 52 is on. When it is determined that the engagement is not completed, the processes of steps S17 and S53 are repeatedly executed until the engagement is completed. On the other hand, if it is determined that the engagement is completed, the current control routine is terminated.

  In the fourth embodiment, the supply flow rate is increased when the first engagement member 11 reaches the contact position. Therefore, for example, as shown in FIG. 5, when the tip of the tooth 13 of the first tooth row 14 hits the tip of the tooth 15 of the second tooth row 16, the tooth 13 is supplied between the teeth 13 and 15. Oil increases. Therefore, the frictional force between these teeth 13 and 15 can be further reduced. Since the friction reducing effect can be increased in this way, the teeth 13 of the first tooth row 14 can be guided more quickly between the teeth 15 and the teeth 15 of the second tooth row 16. Therefore, the clutch 10 can be switched to the engaged state more quickly. Note that the control device 40 functions as the flow rate control means of the present invention by adjusting the supply flow rate by executing the engagement control routine of FIG.

  In this embodiment, the first position sensor 51 and the second position sensor 52 are used to detect that the first engagement member 11 has moved to the contact position or the engagement position. Therefore, for example, even when the thrust of the piston 23 fluctuates due to disturbance or the like, it can be reliably detected that the first engagement member 11 has moved to the contact position. Thereby, it is possible to prevent the supply flow rate from being increased at an incorrect timing.

  FIG. 16 shows a modification of the engagement control routine executed by the control device 40 in this embodiment. In this modification, the same processes as those in the control routine of FIG.

  In this control routine, the control device 40 proceeds with the process up to step S52 as in the control routine of FIG. In the next step S61, the control device 40 starts torque input control for inputting torque from the MG 3 to the first engagement member 11. In subsequent step S62, control device 40 determines whether or not the output signal of second position sensor 52 is on. If the output signal of the second position sensor 52 is off, step S62 is repeatedly executed until the output signal is switched on. On the other hand, if it is determined that the output signal of the second position sensor 52 is on, the process proceeds to step S63, and the control device 40 ends the torque input control. In the next step S64, the control device 40 decreases the supply flow rate. The supply flow rate may be reduced by, for example, reducing the rotational speed of the electric motor of the oil pump 31. As the supply flow rate after the decrease, for example, a flow rate capable of maintaining the first engagement member 11 in the engagement position is set. Thereafter, the current control routine is terminated.

  In this modification, after the first engagement member 11 moves to the engagement position, the torque input control is terminated and the supply flow rate is decreased. Therefore, energy consumed when switching the clutch 10 to the engaged state can be reduced. Further, it is possible to suppress the oil from being wasted from the tip of the tooth 13. Further, since the position of the first engagement member 11 is detected by the first position sensor 51 and the second position sensor 52, the start and end of the torque input control and the change of the supply flow rate are prevented from being executed at an incorrect timing. it can.

(5th form)
An engaging device according to a fifth embodiment of the present invention will be described with reference to FIGS. 17 and 18. FIG. 17 shows an enlarged view of a part of the clutch 10 and the hydraulic cylinder 21 of this embodiment. In this figure, the supply device 30 is not shown. As shown in this figure, this embodiment is different from the fourth embodiment in that only the first position sensor 51 is provided, and is otherwise the same as the fourth embodiment. Therefore, the same parts as those in the fourth embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 18 shows an engagement control routine executed by the control device 40 in this embodiment. This control routine is also repeatedly executed at predetermined intervals in parallel with a plurality of other control routines executed by the control device 40, similarly to the engagement control routine of the first embodiment. In this control routine, the same processes as those in the above-described engagement control routines are denoted by the same reference numerals, and description thereof is omitted.

  In this control routine, the control device 40 first determines whether or not a predetermined engagement condition is satisfied in step S11. If it is determined that the engagement condition is not satisfied, the current control routine is terminated. On the other hand, if it is determined that the engagement condition is satisfied, the process proceeds to step S71, and the control device 40 calculates the determination value t. This determination value t is the same as the second determination value t2 of the third embodiment described above. Therefore, what is necessary is just to calculate by the method similar to 2nd determination value t2. In subsequent step S <b> 12, the control device 40 starts supplying oil to the first working chamber 24.

  In the next step S51, the control device 40 determines whether or not the output signal of the first position sensor 51 is on, and repeatedly executes step S51 until the output signal is switched on. On the other hand, if it is determined that the output signal of the first position sensor 51 is on, the process proceeds to step S72, and the control device 40 resets the timer and then starts counting the timer. In subsequent step S61, control device 40 starts torque input control. In the next step S73, the control device 40 determines whether or not the timer value is greater than or equal to the determination value t. This process is repeatedly executed until the timer value becomes equal to or greater than the determination value t. When the timer value is equal to or greater than the determination value t, the process proceeds to step S63, and the control device 40 ends the torque input control. Thereafter, the current control routine is terminated.

  In this configuration, when the first engagement member 11 reaches the contact position, torque input control is started, so that the teeth 13 of the first tooth row 14 are quickly guided between the teeth 15 and 15 of the second tooth row 16. be able to. In addition, since the start timing of the torque input control is controlled based on the output signal of the first position sensor 51, for example, even when the thrust of the piston 23 fluctuates due to a disturbance or the like, the torque input control is started at an incorrect timing. Can be prevented. Furthermore, since the determination as to whether or not the engagement of the clutch 10 has been completed is performed based on the calculated determination value t, the second position sensor 52 can be omitted. Therefore, cost can be reduced.

  This invention is not limited to each form mentioned above, It can implement with a various form. For example, the device in which the engagement device of the present invention is incorporated is not limited to a power transmission device mounted on a vehicle. The engagement device of the present invention may be incorporated into various devices that need to switch between permitting and blocking rotation transmission.

  The engagement member that inputs torque in the torque input control of the engagement control routine is not limited to the first engagement member. When torque can be input to the second engagement member, torque may be input to the second engagement member in torque input control. Further, torque may be input to both the first engagement member and the second engagement member so that the difference between the rotation speed of the first engagement member and the rotation speed of the second engagement member is increased.

  The oil passage may not be provided in the rod of the hydraulic cylinder. The oil passage only needs to be provided so that one end is open to each tooth of the first engagement member and the other end is connected to the first working chamber of the hydraulic cylinder. Therefore, a pipe that connects the first working chamber and each tooth of the first engagement member as an oil passage may be provided outside the hydraulic cylinder. In the teeth of the first engagement member, the position where one end of the oil passage opens is not limited to the positions shown in the above-described embodiments. One end of the oil passage only has to open to the surface of the first engagement member facing the second engagement member. Further, one end of the oil passage may not be provided on all teeth of the first engagement member. For example, one end of the oil passage may be provided on only some of the teeth of the first engagement member. Even in this case, when the tip of the tooth of the first engagement member collides with the tip of the tooth of the second engagement member, the gap between the tooth provided with one end of the oil passage and the tooth of the second engagement member The frictional force can be reduced. Therefore, switching to the engaged state can be performed quickly.

  The shape of the teeth of the clutch provided in the engagement device of the present invention is not limited to the shape shown in each of the above embodiments. For example, as shown in FIGS. 19 to 21, the teeth 13 and 15 of the clutch 10 may be so-called single-sided chamfer teeth in which the tooth tip surfaces 13 a and 15 a are inclined. FIG. 19 is a diagram corresponding to FIG. 3 of the first embodiment described above. Similarly, FIG. 20 corresponds to FIG. 4, and FIG. 21 corresponds to FIG. Therefore, in these drawings, the same reference numerals are given to portions common to the above-described embodiments, and description thereof is omitted. In the modified examples shown in these drawings, one end of the oil passage 27 is open to the tooth tip surfaces 13a and 15a. Therefore, also in this modified example, when the tip surface 13a of the tooth 13 of the first tooth row 14 hits the tip surface 15a of the tooth 15 of the second tooth row 16 as shown in FIG. Oil is supplied between the surfaces 13a, 15a. As a result, the frictional force between the tooth tip surfaces 13a and 15a can be reduced, so that the teeth 13 of the first tooth row 14 can be quickly guided between the teeth 15 and 15 of the second tooth row 16. Therefore, the clutch 10 can be quickly switched to the engaged state. Moreover, since there is oil between the teeth 13 of the first tooth row 14 and the teeth 15 of the second tooth row 16 at the time of such a collision, the shock at the time of the collision can be weakened. Furthermore, as shown in FIG. 20, the collision speed of the first engaging member 11 immediately before the clutch 10 is switched to the engaged state can be reduced by the oil sprayed from the teeth 13 of the first tooth row 14. Therefore, the shock at the time of the 1st engagement member 11 and the 2nd engagement member 12 meshing can be weakened.

  The cylinder mechanism provided in the engagement device of the present invention is not limited to a hydraulic cylinder that operates with oil. The cylinder mechanism may be a cylinder mechanism that operates with a gas such as air. 22 and 23 show an engagement device when a gas cylinder 60 that operates with gas is provided instead of the hydraulic cylinder. As shown in these drawings, the gas cylinder 60 includes a cylinder body 61 and a piston 62 inserted in the cylinder body 61 so as to be able to reciprocate similarly to the hydraulic cylinder. The piston 62 divides the inside of the cylinder body 61 into a first working chamber 63 and a second working chamber 64. A rod 65 is connected to the piston 62, and the other end of the rod 65 is connected to the first engagement member 11. As shown in these drawings, one end of each of the first engagement member 11 and the gas cylinder 60 opens at the tip of each tooth 13 of the first tooth row 14, and the other end is connected to the first working chamber 63. A gas passage 66 is provided as a working fluid passage. A check valve 67 is provided in the middle of the gas passage 66. The check valve 67 permits the flow of gas from the first working chamber 63 to each tooth 13 as shown in FIG. 22, and the gas from each tooth 13 to the first working chamber 63 as shown in FIG. The flow is provided to be cut off.

  In the engagement device 1 of this modification, a pump 68 is provided instead of the oil pump. The pump 68 is connected to the first working chamber 63 by a connection passage 69. The pump 68 includes an electric motor as a drive source. And the air pump 68 is comprised so that gas can be discharged to the 1st working chamber 63, or the gas of the 1st working chamber 63 can be attracted | sucked by changing the rotation direction of the electric motor. An accumulator 70 is connected to the connection passage 69. A valve 71 is provided in the connection passage 69. The valve 71 is configured to be switchable between an open state in which the connection passage 69 and the accumulator 70 communicate with each other and a closed state in which the accumulator 70 is disconnected from the connection passage 69.

  In this modification, when the clutch 10 is switched from the released state to the engaged state, gas is supplied from the pump 68 to the first working chamber 63 as indicated by an arrow Fa1 in FIG. As a result, the fluid pressure indicated by the arrow P3 acts on the piston 62, and the first engagement member 11 moves to the engagement position. At this time, gas is ejected from the tips of the teeth 13 of the first tooth row 14 as indicated by the arrow Fa2. Therefore, when the tip of the tooth 13 of the first tooth row 14 collides with the tip of the second tooth row 16 tooth 15 as in the above-described embodiments, gas is interposed between the teeth 13 and 15. Thereby, since the frictional force between these teeth 13 and 15 can be reduced, the clutch 10 can be promptly switched to the engaged state. Further, since the gas is interposed between the teeth 13 and 15 as described above, the shock can be weakened at the time of collision. Furthermore, the collision speed of the 1st engagement member 11 just before the clutch 10 switches to an engagement state with the gas injected from each tooth | gear 13 of the 1st tooth row | line 14 can be reduced. Therefore, the shock at the time of the 1st engagement member 11 and the 2nd engagement member 12 meshing can be weakened. Since the first engagement member 11 is thus driven, the first working chamber 63 also corresponds to the working chamber of the present invention in this modification.

  On the other hand, when the clutch 10 is switched from the engaged state to the released state, the gas in the first working chamber 63 is sucked by the pump 68 as indicated by the arrow Fa3 in FIG. At this time, since the check valve 67 blocks the gas flow from each tooth 13 to the first working chamber 63, the pressure in the first working chamber 63 can be reduced to less than atmospheric pressure. As a result, the suction force indicated by the arrow P4 acts on the piston 62. Therefore, the first engagement member 11 can be driven upward in this figure as indicated by the arrow F4. Therefore, the first engagement member 11 can be moved to the release position and the clutch 10 can be switched to the release state.

1 engaging device 3 motor generator (torque applying means)
10 Clutch (clutch means)
DESCRIPTION OF SYMBOLS 11 1st engagement member 12 2nd engagement member 13 Teeth of 1st engagement member 14 1st tooth row 15 Tooth of 2nd engagement member 16 2nd tooth row 20 Drive apparatus (drive means)
21 Hydraulic cylinder (cylinder mechanism)
22 Cylinder body 23 Piston 24 First working chamber 27 Oil passage (working fluid passage)
31 Oil pump (flow rate adjusting means)
35 Accumulator (Flow rate adjusting means)
40 Control device (flow rate control means, torque control means)
51 1st position sensor (position detection means)
60 Gas cylinder (cylinder mechanism)
61 Cylinder body 62 Piston 63 First working chamber 66 Gas passage (working fluid passage)
Ax axis

Claims (4)

A first engagement member having a first tooth row formed by a plurality of teeth arranged in the circumferential direction and a plurality of teeth arranged in the circumferential direction and meshing with the first tooth row And a second engagement member having a second tooth row that is capable of relative rotation about a common axis, and the first engagement member is provided so as to be movable in the direction of the axis With means,
By moving the first engagement member in the direction of the axis by driving means, the clutch means is engaged with the first tooth row and the second tooth row, the first tooth row, and the In the engagement device that switches to a released state in which the second tooth row is separated,
The drive means includes a cylinder body and a piston that is reciprocally movable in the cylinder body and connected to the first engagement member, and operates in an operation chamber formed in the cylinder body. A cylinder mechanism for switching the clutch means from the released state to the engaged state by supplying fluid and driving the piston;
A working fluid having one end opened in a surface facing the second engaging member of at least some of the plurality of teeth forming the first tooth row and the other end connected to the working chamber An engagement device comprising a passage.   Position detecting means for detecting whether or not the first engagement member has moved to a contact position where the tip of the tooth of the first tooth row contacts the tip of the tooth of the second tooth row; A flow rate adjusting means capable of adjusting a flow rate of fluid; and the first engagement member is moved to the contact position by the position detection means when the clutch means is switched from the released state to the engaged state. 2. The engagement device according to claim 1, further comprising: a flow rate control unit that controls the flow rate adjusting unit so that the flow rate of the working fluid supplied to the working chamber increases when the flow rate is detected.   Torque applying means capable of applying torque about the axis to the first engaging member or the second engaging member; and the clutch means when the clutch means is switched from the released state to the engaged state. It is estimated whether one engagement member has moved to a contact position where the tip of the tooth of the first dentition and the tip of the tooth of the second dentition contact each other, and the first engagement member moves to the contact position The engagement according to claim 1, further comprising torque control means for controlling the torque applying means so that torque is applied to the first engaging member or the second engaging member when it is estimated that apparatus.   Position detecting means for detecting whether or not the first engagement member has moved to a contact position where the tip of the tooth of the first dentition contacts the tip of the tooth of the second dentition; and the first engagement member or A torque applying means capable of applying a torque around the axis to the second engaging member; and the position detecting means when the clutch means is switched from the released state to the engaged state. Torque control means for controlling the torque application means so that torque is applied to the first engagement member or the second engagement member when it is detected that the combined member has moved to the contact position; The engagement device according to claim 1, further comprising:

Images