JP2013130247A - Control device of drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of a drive device, capable of preventing an actuator driving a switching member from being greatly burdened.SOLUTION: The switching member 30 for transmitting torque of a tilt/telescopic-combined electric motor 20 is connected to a tilt-angle adjustment mechanism coupling 32 or a telescopic-mechanism coupling 33 in the use of a change-over electric motor 40. Thereby the torque is transmitted to either of a tilt-angle adjustment mechanism 11 and a telescopic mechanism 12. Before start of connection of the switching member 30 to either of the tilt-angle adjustment mechanism coupling 32 and telescopic-mechanism coupling 33, the tilt/telescopic-combined electric motor 20 is rotated reversely.

Description

  The present invention relates to a control device for a drive device that uses a second actuator to switch a mechanism that drives using a first actuator among a first drive mechanism and a second drive mechanism.

  The steering device described in Patent Document 1 includes a first drive mechanism (tilt angle adjustment mechanism), a second drive mechanism (telescopic mechanism), and an electric motor that drives these drive mechanisms. Further, a rod capable of selecting a state in which the driving force of the first actuator is transmitted to the first driving mechanism and a state in which the driving force of the first actuator is transmitted to the second driving mechanism, and the first by driving the rod And a second actuator for selecting a transmission destination of the driving force of the actuator.

  When the rod is meshed with the gear of the first drive mechanism, the driving force of the electric motor is transmitted to the second drive mechanism. On the other hand, when the rod is engaged with the gear of the second drive mechanism, the driving force of the electric motor is transmitted to the first drive mechanism.

JP 2007-91171 A

  In the steering apparatus, when the second drive mechanism is driven by the electric motor, the rod is held in a state of being pressed against the gear of the first drive mechanism by the torque of the electric motor. For this reason, a twist may occur in which the contact force between the rod and the gear of the first drive mechanism is excessively increased. Further, when the second drive mechanism is driven by the electric motor, for example, the gear of the first drive mechanism is pressed against the rod due to the vibration of the first drive mechanism, whereby the rod and the gear of the first drive mechanism are twisted. May occur.

  And when a twist has arisen, when driving a rod by the 2nd actuator in order to cancel meshing with a gear of a rod and the 1st drive mechanism, there is a possibility that a big load may be applied to the actuator. Even when the first drive mechanism is driven by the electric motor, the rod and the gear of the second drive mechanism may be twisted in the same manner as described above.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a control device for a drive device that can prevent a large load from being applied to an actuator that drives a switching member. .

  (1) The first means is the invention according to claim 1, that is, a first actuator for driving the first drive mechanism and the second drive mechanism, and a first connection member connected to the first drive mechanism. A second connection member connected to the second drive mechanism, a first transmission state in which a drive force of the first actuator is transmitted to the first connection member, and a drive force of the first actuator to the second A driving device comprising: a switching member capable of switching a second transmission state transmitted to a connecting member; and a second actuator that selects the first transmission state or the second transmission state by driving the switching member. In the control device of the drive device that drives the first drive mechanism or the second drive mechanism by controlling the first actuator, the switching member is in the first transmission state. And the control A for changing the switching member to the second transmission state after rotating the first actuator in the reverse direction, and the first actuator rotating in the reverse direction when the switching member is in the second transmission state. After that, the gist is to perform at least one of the control B for changing the switching member to the first transmission state.

  When the first actuator rotates in the reverse direction in the first transmission state, a force is applied to the switching member to change the rotation direction of the switching member relative to the first connecting member to a direction opposite to the previous rotation direction. For this reason, when the switching member and the first connecting member are twisted, the possibility that the twisting is eliminated increases. Further, when the switching member and the second connecting member are twisted, the possibility that the twisting is similarly eliminated is increased. When the twisting between the first connecting member or the second connecting member and the switching member is eliminated, the switching member is changed to the second transmission state or the first transmission state as compared with the case where the twisting is not eliminated. Therefore, the driving force of the second actuator required for this is reduced. That is, it is possible to prevent a large load from being applied to the actuator that drives the switching member.

  (2) The second means is the control device of the drive device according to the invention of claim 2, that is, the control device of the drive device of claim 1, wherein at least one of the control A and the control B reverses the first actuator. Further, the switching member is changed to the second transmission state or the first transmission state after the reciprocating operation is performed a plurality of times or during the reciprocating operation. Is the gist.

  The twisting between the switching member and the first connecting member or the second connecting member may not be resolved by simply rotating the first actuator in the reverse direction once. According to this invention, since the reciprocating operation of the first actuator is performed a plurality of times, the frequency with which the twisting is eliminated becomes higher. Further, when the transmission state of the switching member is changed during execution of the reciprocating operation of the first actuator, the transmission state is compared with the case where the change of the transmission state of the switching member is started after execution of the reciprocating operation of the first actuator. The operation to change the state is started early.

  ADVANTAGE OF THE INVENTION According to this invention, the control apparatus of the drive device which can suppress that a big load is applied to the actuator which drives a switching member can be provided.

The schematic diagram which shows the whole structure about the drive device of one Embodiment of this invention. About the drive device of the embodiment, (a) is a front view showing the front structure of the switching member, (b) is a rear view showing the back structure of the switching member, and (c) is a side view showing the side structure of the switching member. (A) is a front view which shows the front structure of a tilt angle adjustment mechanism coupling | bonding about the drive device of the embodiment, (b) is a side view which shows the side structure of a tilt angle adjustment mechanism coupling | bonding. About the drive device of the embodiment, (a) is a front view showing a front structure of a telescopic mechanism joint, and (b) is a side view showing a side structure of a telescopic mechanism joint. FIG. 4A is a configuration diagram illustrating a configuration when driving a tilt angle adjustment mechanism, and FIG. 4B is a configuration diagram illustrating a configuration when driving a telescopic mechanism in the drive device of the embodiment. The timing chart which shows the change with respect to the time of (a) 1st motor current and (b) 2nd motor current about the drive device of the embodiment. The flowchart which shows the procedure of the tilt telescopic switching process about the drive device of the embodiment. The timing chart which shows the change with respect to time of (a) 1st motor current and (b) 2nd motor current about the drive device as other embodiments of the present invention. The timing chart which shows the change with respect to time of (a) 1st motor current and (b) 2nd motor current about the drive device as other embodiments of the present invention.

  With reference to FIG. 1, the structure of the drive device 10 is demonstrated. The drive device 10 is configured as a part of an electric power steering device, and has a function for adjusting a tilt angle of a steering wheel (not shown) and a position in a column shaft (not shown) direction (hereinafter referred to as a telescopic position). It has.

  The drive device 10 includes a tilt angle adjustment mechanism 11 that adjusts the tilt angle of the steering wheel, a telescopic mechanism 12 that adjusts the telescopic position of the steering wheel, and a power transmission that transmits a driving force to the tilt angle adjustment mechanism 11 or the telescopic mechanism 12. And a mechanism 13. In addition to this, the tilt / telescopic electric motor 20 that applies a driving force to the tilt angle adjusting mechanism 11 or the telescopic mechanism 12, the switching electric motor 40 that switches the transmission destination of the driving force of the motor 20, and each motor 20 , 40 and an operation unit 51 operated by the driver to adjust the tilt angle or the telescopic position.

  The power transmission mechanism 13 is integrated with the first screw gear 21 that receives the driving force of the tilt and telescopic electric motor 20, the second screw gear 22 that meshes with the first screw gear 21, and the second screw gear 22. It has a spur gear 25 that rotates, and a rotating member 24 that connects the second screw gear 22 and the spur gear 25 to each other. In addition, a first support shaft 23 that supports the second screw gear 22, the rotating member 24, and the spur gear 25 is provided.

  The second screw gear 22, the rotating member 24, and the spur gear 25 rotate with respect to the first support shaft 23 around the central axis of the first support shaft 23. The rotation of the first screw gear 21 is converted into rotation around the central axis of the first support shaft 23 by meshing with the second screw gear 22.

  The power transmission mechanism 13 includes a switching member 30 meshed with the spur gear 25, a tilt angle adjustment mechanism joint 32 that transmits the rotation of the switching member 30 to the tilt angle adjustment mechanism 11, and a switch A telescopic mechanism joint 33 that transmits the rotation of the member 30 to the telescopic mechanism 12 and a second support shaft 31 that supports the switching member 30 and the telescopic mechanism joint 33 in a rotatable state. In addition to this, a telescopic drive gear 34 to which the rotation of the telescopic mechanism joint 33 is transmitted, and a telescopic drive shaft 35 to which the telescopic drive gear 34 is fixed are provided.

  The switching member 30, the tilt angle adjusting mechanism joint 32, and the telescopic mechanism joint 33 are provided coaxially. The central axis of the first support shaft 23, the central axis of the second support shaft 31, and the central axis of the telescopic drive shaft 35 are parallel to each other.

  The switching member 30 is supported by the second support shaft 31 in a state in which the switch member 30 can rotate and move in the axial direction with respect to the second support shaft 31. That is, it rotates relative to the second support shaft 31 around the center axis of the second support shaft 31, and reciprocates relative to the second support shaft 31 within a predetermined range in the axial direction of the second support shaft 31. Is allowed.

  A spur gear 61 that meshes with the spur gear 25 is formed on the outer peripheral surface of the switching member 30. The switching member 30 and the spur gear 25 are kept in mesh within a range in which the switching member 30 reciprocates with respect to the second support shaft 31.

The tilt angle adjustment mechanism joint 32 is fixed to the second support shaft 31.
The telescopic mechanism joint 33 is supported by the second support shaft 31 so as to be rotatable with respect to the second support shaft 31. A spur gear 81 that meshes with the telescopic drive gear 34 is formed on the outer peripheral surface of the telescopic mechanism joint 33.

  The power transmission mechanism 13 includes, as components for driving the switching member 30, a slider 43 that sandwiches a part of the switching member 30 from both sides in the axial direction, a switching nut 42 fixed to the slider 43, and a switching nut 42. A switching screw shaft 41 that moves in the direction and a switching electric motor 40 that rotates the switching screw shaft 41 are provided.

  The operation unit 51 includes a first operation unit for changing the tilt angle and a second operation unit for changing the telescopic position. The first operation unit includes an up button for instructing an increase in tilt angle and a down button for instructing a decrease in tilt angle. The second operation unit includes a forward button for instructing advance of the telescopic position and a backward button for instructing backward movement of the telescopic position.

  In this drive device 10, the tilt angle change direction when the steering wheel is driven upward is defined as the tilt angle increase, and the tilt angle change direction when the steering wheel is driven downward is tilted. The angle is decreasing. Further, the direction of change of the telescopic position when the steering wheel approaches the driver's seat is defined as the forward movement of the telescopic position, and the direction of change of the telescopic position when the steering wheel is separated from the driver's seat is defined as the backward movement of the telescopic position.

With reference to FIG. 2, the detailed structure of the switching member 30 is demonstrated.
The switching member 30 has a through hole 62 into which the second support shaft 31 is inserted.
On the front end face 63 (FIG. 2A) of the switching member 30, four columnar protrusions 64 are provided. The protrusions 64 are provided at equal intervals in the circumferential direction of the front end surface 63. The center line of each protrusion 64 is parallel to the center line of the through hole 62.

  On the end surface 63 (FIG. 2B) on the back side of the switching member 30, four columnar protrusions 64 are provided. The protrusions 64 are provided at equal intervals in the circumferential direction of the end surface 63 on the back side. The center line of each protrusion 64 is parallel to the center line of the through hole 62.

A detailed configuration of the tilt angle adjusting mechanism joint 32 will be described with reference to FIG.
The tilt angle adjusting mechanism joint 32 is formed with a through hole 71 into which the second support shaft 31 of FIG. 1 is inserted. The second support shaft 31 is fitted into the through hole 71.

  The tilt angle adjusting mechanism joint 32 is formed with four insertion portions 73 for inserting the protruding portions 64 of the switching member 30. Each insertion portion 73 is open at an end surface 72 facing the switching member 30.

  The insertion portion 73 is formed as an arc-shaped long hole having a predetermined length in the circumferential direction. The diameter of the insertion portion 73 is set to a size that allows the projection 64 of the switching member 30 to be fitted with a clearance.

  The two insertion portions 73 have their respective circumferential centers positioned on a predetermined line Ka along the radial direction. The other two insertion portions 73 are positioned on a predetermined line Kb whose center in the circumferential direction is along the radial direction. Note that the line Ka and the line Kb are orthogonal to each other.

  The two insertion portions 73 have a line-symmetric relationship with the line Kb as the axis of symmetry. The other two insertion portions 73 have a line-symmetric relationship with the line Ka as the axis of symmetry. The distance Lb in the radial direction between the intersection Ca of the lines Ka and Kb and the four insertion portions 73 is set to the same size.

A detailed configuration of the telescopic mechanism joint 33 will be described with reference to FIG.
As shown in FIG. 4B, the telescopic mechanism joint 33 includes a cylindrical portion 82 in which a spur gear 81 is formed, and a protruding portion 83 that protrudes in the axial direction from the end surface of the cylindrical portion 82.

  As shown in FIG. 4A, the telescopic mechanism joint 33 is formed with a through hole 84 into which the second support shaft 31 of FIG. 1 is inserted. The second support shaft 31 is fitted in the through hole 84.

  The telescopic mechanism joint 33 is formed with four insertion portions 86 for inserting the protruding portions 64 of the switching member 30. Each insertion part 86 is opened in the end surface 85 facing the switching member 30.

  The insertion portion 86 is formed as an arc-shaped slot having a predetermined length in the circumferential direction. The diameter of the insertion portion 86 is set to a size that allows the protruding portion 64 of the switching member 30 to be loosely fitted.

  The two insertion portions 86 have their respective circumferential centers positioned on a predetermined line Kc along the radial direction. The other two insertion portions 86 are positioned on a predetermined line Kd whose center in the circumferential direction is along the radial direction. Note that the line Kc and the line Kd are orthogonal to each other.

  The two insertion portions 86 have a line-symmetric relationship with the line Kd as the axis of symmetry. The other two insertion portions 86 have a line-symmetric relationship with the line Kc as the axis of symmetry. The distance Lc in the radial direction between the intersection Cb of the line Kc and the line Kd and the four insertion portions 86 is set to the same size.

With reference to FIG. 1, the operation of the driving apparatus 10 will be described.
When the positive first motor current Ia is supplied to the tilt and telescopic electric motor 20, the first screw gear 21 rotates in the first rotation direction. When the negative first motor current Ia is supplied to the tilt and telescopic electric motor 20, the first screw gear 21 rotates in the second rotation direction that is the rotation direction opposite to the first rotation direction.

  When the first screw gear 21 meshes with the second screw gear 22 and rotates, the rotational motion of the first screw gear 21 is converted into rotational motion around the central axis of the first support shaft 23 of the second screw gear 22. The The spur gear 25 rotates integrally with the second screw gear 22.

  With reference to FIG. 5, the operation of switching the driving mechanism by transmitting the driving force of the tilt / telescopic electric motor 20 of the tilt angle adjusting mechanism 11 and the telescopic mechanism 12 will be described.

  When the positive second motor current Ib is supplied to the switching electric motor 40, the switching screw shaft 41 rotates in the first rotation direction. When the negative second motor current Ib is supplied to the switching electric motor 40, the switching screw shaft 41 rotates in the second rotation direction.

  When the switching screw shaft 41 rotates in the first rotation direction, the switching nut 42, the slider 43, and the switching member 30 move together and move toward the tilt angle adjusting mechanism joint 32 as shown in FIG. . When the switching member 30 moves to the tilt angle adjustment mechanism joint 32 side, the four protrusions 64 that protrude to the tilt angle adjustment mechanism joint 32 side are inserted into the four insertion portions 73 of the tilt angle adjustment mechanism joint 32, respectively. . The four projecting portions 64 projecting toward the telescopic mechanism joint 33 are pulled out from the insertion portion 86 of the telescopic mechanism joint 33.

  When the switching member 30 rotates around the central axis of the second support shaft 31 in a state where the protrusion 64 is inserted into the insertion portion 73 of the tilt angle adjusting mechanism joint 32, the protrusion 64 and the insertion portion 73 When the gap is in the rotation direction, the switching member 30 rotates until the protruding portion 64 contacts the insertion portion 73. After the switching member 30 rotates and the projecting portion 64 contacts the insertion portion 73, the switching member 30 and the tilt angle adjusting mechanism joint 32 rotate together. Then, the rotation of the tilt angle adjusting mechanism joint 32 is transmitted to the tilt angle adjusting mechanism 11 via the second support shaft 31.

  Hereinafter, the protrusion 64 on the front side of the switching member 30 is inserted into the insertion part 73 of the tilt angle adjusting mechanism joint 32, and the protrusion 64 on the back side of the switching member 30 is pulled from the insertion part 86 of the telescopic mechanism joint 33. The extracted state is referred to as a “first transmission state”. In this first transmission state, the driving force of the tilt and telescopic electric motor 20 is transmitted to the tilt angle adjustment mechanism 11 in the order indicated by the arrow Ya in FIG.

  When the negative second motor current Ib is supplied to the switching electric motor 40, the switching screw shaft 41 rotates in the second rotation direction. When the switching screw shaft 41 rotates in the second rotation direction, the switching nut 42, the slider 43, and the switching member 30 move together and move toward the telescopic mechanism joint 33 as shown in FIG. When the switching member 30 moves to the telescopic mechanism joint 33 side, the four protrusions 64 that protrude to the telescopic mechanism joint 33 side are inserted into the four insertion portions 86 of the telescopic mechanism joint 33, respectively. The four projecting portions 64 projecting toward the tilt angle adjusting mechanism joint 32 are pulled out from the insertion portion 73 of the tilt angle adjusting mechanism joint 32.

  When the switching member 30 rotates around the central axis of the second support shaft 31 in a state in which the protruding portion 64 is inserted into the insertion portion 86 of the telescopic mechanism joint 33, a gap between the protruding portion 64 and the insertion portion 86 is formed. When in the rotational direction, the switching member 30 rotates until the protruding portion 64 contacts the insertion portion 86. After the switching member 30 rotates and the projecting portion 64 contacts the insertion portion 86, the switching member 30 and the telescopic mechanism joint 33 rotate together.

  The rotation of the telescopic mechanism joint 33 is transmitted to the telescopic drive gear 34 when the spur gear 81 and the telescopic drive gear 34 are engaged with each other. The rotation of the telescopic drive gear 34 is transmitted to the telescopic mechanism 12 via the telescopic drive shaft 35.

  Hereinafter, the protrusion 64 on the back side of the switching member 30 is inserted into the insertion part 86 of the telescopic mechanism joint 33, and the protrusion 64 on the front side of the switching member 30 is pulled from the insertion part 73 of the tilt angle adjustment mechanism joint 32. The extracted state is referred to as a “second transmission state”. In this second transmission state, the driving force of the tilt and telescopic electric motor 20 is transmitted to the telescopic mechanism 12 in the order indicated by the arrow Yb in FIG.

The operation of the operation unit 51 will be described.
When the up button is pressed, the operation unit 51 generates a tilt operation signal Sa indicating an increase in tilt angle as the adjustment direction of the tilt angle adjustment mechanism 11. On the other hand, when the lowering button is pressed, the operation unit 51 generates a tilt operation signal Sa indicating a decrease in the tilt angle as the adjustment direction of the tilt angle adjustment mechanism 11. Further, when the forward button is pressed, the operation unit 51 generates a telescopic operation signal Sb indicating the advance of the telescopic position as the adjustment direction of the telescopic mechanism 12. On the other hand, when the retreat button is pressed, the operation unit 51 generates a telescopic operation signal Sb indicating retraction of the telescopic position as the adjustment direction of the telescopic mechanism 12.

The operation of the control device 50 will be described with reference to FIG.
When detecting the telescopic operation signal Sb in the first transmission state, the control device 50 determines that the mechanism to be driven needs to be switched from the tilt angle adjusting mechanism 11 to the telescopic mechanism 12. Further, when the tilt operation signal Sa is detected in the second transmission state, the control device 50 determines that the driving mechanism needs to be switched from the telescopic mechanism 12 to the tilt angle adjusting mechanism 11.

  When it is determined that the driving mechanism needs to be switched to the tilt angle adjusting mechanism 11, the control device 50 generates the first motor current Ia whose sign is inverted at a predetermined time interval ta as shown in FIG. It is supplied as a current Ik at the time of switching. That is, the first motor current Ia repeats the reciprocating operation for a predetermined number of times, with the reverse rotation and the forward rotation of the tilt / telescopic electric motor 20 as reciprocating operations.

  The reverse rotation of the tilt and telescopic electric motor 20 indicates a rotation opposite to the direction in which the electric motor 20 was rotating before the determination result was obtained. That is, when the electric motor 20 is rotating in the first rotation direction in the same state, the rotation in the second rotation direction corresponds to the reverse rotation. Further, in the same state, when the electric motor 20 is rotating in the second rotation direction, rotation in the first rotation direction corresponds to reverse rotation.

  The forward rotation of the tilt and telescopic electric motor 20 indicates the rotation in the same direction as the direction in which the electric motor 20 was rotating before the determination result was obtained. That is, when the electric motor 20 is rotating in the first rotation direction in the same state, the rotation in the first rotation direction corresponds to the normal rotation. Further, in the same state, when the electric motor 20 is rotating in the second rotation direction, rotation in the second rotation direction corresponds to normal rotation.

  The control device 50 continues to supply the switching current Ik for a predetermined period tm. Then, when a predetermined time interval tb has elapsed since the supply of the switching current Ik has been completed, as shown in FIG. 6B, the positive switching member 30 is moved in the direction of the tilt angle adjusting mechanism joint 32. A second motor current Ib is supplied. Then, after the mechanism to be driven is switched to the tilt angle adjusting mechanism 11, the supply of the positive second motor current Ib is stopped.

  After the supply of the positive second motor current Ib is stopped, when the tilt operation signal Sa is continuously detected and the increase of the tilt angle is indicated as the adjustment direction, the positive first motor current Ia is tilted. Also supplied to the electric motor 20 for telescopic use.

  After the supply of the positive second motor current Ib is stopped, when the tilt operation signal Sa is continuously detected and the decrease of the tilt angle is indicated as the adjustment direction, the negative first motor current Ia is tilted. Also supplied to the electric motor 20 for telescopic use. The absolute value of the first motor current Ia when increasing or decreasing the tilt angle is set to the same magnitude.

  When it is determined that the driving mechanism needs to be switched to the telescopic mechanism 12, the control device 50 generates the first motor current Ia whose sign is inverted at a predetermined time interval ta as in the switching to the tilt angle adjusting mechanism 11. It is supplied as a current Ik at the time of switching. Then, after a predetermined time interval tb has elapsed since the supply of the switching current Ik is completed, the negative second motor current Ib that moves the switching member 30 in the direction of the telescopic mechanism joint 33 is supplied.

  After the supply of the negative second motor current Ib is stopped, when the telescopic operation signal Sb is continuously detected and the advance of the telescopic position is indicated as the adjustment direction, the positive first motor current Ia is tilted. Also supplied to the electric motor 20 for telescopic use.

  After the supply of the negative second motor current Ib is stopped, when the telescopic operation signal Sb is continuously detected and the telescopic position is retracted as the adjustment direction, the negative first motor current Ia is tilted. It supplies to the electric motor 20 for telescopic. The absolute value of the first motor current Ia when increasing or decreasing the telescopic position is set to the same magnitude.

  When the control device 50 detects the tilt operation signal Sa in the first transmission state or detects the telescopic operation signal Sb in the second transmission state, the controller 50 does not need to switch the driving mechanism. judge. When the control device 50 determines that there is no need to switch the driving mechanism, the controller 50 does not supply the switching current Ik and the second motor current Ib, but in the adjustment direction indicated by the tilt operation signal Sa or the telescopic operation signal Sb. A corresponding first motor current Ia is supplied.

  The details of the tilt telescopic switching process will be described with reference to FIG. Note that the control device 50 repeatedly executes this process at a predetermined control cycle. That is, after reaching the end step, the execution of the process of step S11 is suspended until the predetermined control period elapses, and the process of step S11 is performed again when the predetermined control period elapses.

  In step S11, it is determined whether or not the tilt operation signal Sa has been detected. When a positive determination is made in step S11, the process proceeds to step S17. On the other hand, when a negative determination is made in step S11, the process proceeds to step S12.

  In step S12, it is determined whether or not the telescopic operation signal Sb has been detected. When an affirmative determination is made in step S12, the process proceeds to step S13. On the other hand, when a negative determination is made in step S12, the present process is temporarily terminated.

  In step S13, it is determined whether or not it is necessary to switch from the first transmission state to the second transmission state. That is, it is determined whether it is necessary to switch the driving mechanism from the tilt angle adjusting mechanism 11 to the telescopic mechanism 12. When an affirmative determination is made in step S13, the process proceeds to step S14. On the other hand, when a negative determination is made in step S13, steps S14 and S15 are omitted, and the process proceeds to step S16.

  In step S <b> 14, the switching current Ik is supplied to the tilt and telescopic electric motor 20. That is, the operation of switching the rotation direction of the tilt / telescopic electric motor 20 between the reverse direction and the forward direction is executed a plurality of times.

In step S <b> 15, the negative second motor current Ib is supplied to the switching electric motor 40. That is, the state of the switching member 30 is switched from the first transmission state to the second transmission state.
In step S16, a first motor current Ia having a sign corresponding to the adjustment direction of the telescopic mechanism 12 indicated by the telescopic operation signal Sb is supplied to the tilt and telescopic electric motor 20. That is, the telescopic mechanism 12 is driven in a direction corresponding to the operation of the operation unit 51.

  In step S17, it is determined whether or not it is necessary to switch from the second transmission state to the first transmission state. That is, it is determined whether it is necessary to switch the driving mechanism from the telescopic mechanism 12 to the tilt angle adjusting mechanism 11. When an affirmative determination is made in step S17, the process proceeds to step S18. On the other hand, when a negative determination is made in step S17, steps S18 and S19 are omitted, and the process proceeds to step S20.

  In step S18, the switching current Ik is supplied to the tilt / telescopic electric motor 20. That is, the operation of switching the rotation direction of the tilt / telescopic electric motor 20 between the reverse direction and the forward direction is executed a plurality of times.

In step S <b> 19, the positive second motor current Ib is supplied to the switching electric motor 40. That is, the state of the switching member 30 is switched from the second transmission state to the first transmission state.
In step S20, the first motor current Ia having a sign corresponding to the adjustment direction of the tilt angle adjustment mechanism 11 indicated by the tilt operation signal Sa is supplied to the electric motor 20 for tilt and telescopic. That is, the tilt angle adjustment mechanism 11 is driven in a direction according to the operation of the operation unit 51.

According to the control device 50 of the present embodiment, the following effects can be obtained.
(1) When the switching member 30 is moved to the tilt angle adjusting mechanism joint 32 side and is in the first transmission state, the control device 50 rotates the tilt / telescopic electric motor 20 in the reverse direction and then switches the switching member 30. When the control member 30 moves to the telescopic mechanism joint 33 side and changes to the second transmission state, and the switching member 30 moves to the telescopic mechanism joint 33 side and is in the second transmission state, the tilt and telescopic use After rotating the electric motor 20 in the reverse direction, at least one of the control B for changing the switching member 30 to the first transmission state is performed.

  When the tilt-and-telescopic electric motor 20 rotates in the reverse direction in the first transmission state, there is a force that changes the rotation direction of the switching member 30 relative to the tilt angle adjustment mechanism joint 32 in the direction opposite to the previous rotation direction. It is given to the switching member 30. For this reason, when the switching member 30 and the tilt angle adjusting mechanism joint 32 are twisted, there is a high possibility that the twisting is eliminated. In addition, when the switching member 30 and the telescopic mechanism joint 33 are twisted, there is a high possibility that the twisting is similarly eliminated. When the twisting between the tilt angle adjusting mechanism joint 32 or the telescopic mechanism joint 33 and the switching member 30 is eliminated, it is necessary to perform the control A or the control B as compared with the case where the twisting is not eliminated. It is suppressed that a large load is applied to the switching electric motor 40.

  (2) At least one of the control A and the control B performed by the control device 50 is a reciprocating operation that rotates the tilt and telescopic electric motor 20 in the reverse direction and the forward direction. Later, the switching member 30 is moved to the tilt angle adjusting mechanism joint 32 side or the telescopic mechanism joint 33 side.

  The twisting of the switching member 30 and the tilt angle adjusting mechanism joint 32 or the telescopic mechanism joint 33 may not be resolved by simply rotating the tilt and telescopic electric motor 20 in the reverse direction once. According to this configuration, the reciprocating operation of the tilt and telescopic electric motor 20 is performed a plurality of times, so that the frequency of removing the twist becomes higher.

  The embodiment of the present invention is not limited to the above embodiment, and can be modified as shown below, for example. The following modifications are not applied only to the above-described embodiment, and different modifications can be implemented in combination.

  In the above embodiment, the power transmission mechanism 13 switches the transmission destination to either the tilt angle adjustment mechanism 11 or the telescopic mechanism 12 and transmits the rotation of the electric motor 20 for tilt and telescopic, but the power transmission mechanism 13 is, for example, In addition, the power of the actuator can be transmitted by switching the driving mechanism to one of two other arbitrary mechanisms such as a seat seat surface adjustment mechanism and a reclining adjustment mechanism of a vehicle. Further, the power transmission mechanism 13 can transmit the power of the actuator not only to a mechanism mounted on the vehicle but also to one of two arbitrary mechanisms having a rotational force as a driving force.

  In the above embodiment, the switching current Ik whose sign is inverted at the time interval ta is supplied. However, when the driving mechanism is stored, the sign of the first motor current Ia immediately before switching the driving mechanism is stored. The first motor current Ia, which is supplied for the time interval ta with a code opposite to the stored code, can be used as the switching current Ik. FIG. 8A shows the switching current Ik when the positive first motor current Ia is supplied before the mechanism to be driven is switched to the tilt angle adjusting mechanism 11. FIG. 8B shows the positive second motor current Ib that is supplied when the time interval tb elapses in order to switch the driving mechanism to the tilt angle adjusting mechanism 11 after supplying the switching current Ik. .

  In the above embodiment, the second motor current Ib is supplied and the switching member 30 is moved when the time interval tb has elapsed after the supply of the switching current Ik is completed. It is also possible to move the switching member 30 by supplying the second motor current Ib during the supply. That is, the switching member 30 can be moved while the reciprocating operation of the tilt and telescopic electric motor 20 is being performed. FIG. 9 is a timing chart when the supply of the positive second motor current Ib is started when a time interval ts shorter than the predetermined period tm has elapsed since the start of the supply of the switching current Ik. When the transmission state of the switching member 30 is changed during execution of the reciprocating operation of the tilt / telescopic electric motor 20, the change of the transmission state of the switching member 30 is started after the reciprocating operation of the tilt / telescopic electric motor 20 is performed. Compared with the case where it does, the operation | movement which changes a transmission state is started early.

  In the above embodiment, by inserting the protrusion 64 of the switching member 30 into either the insertion portion 73 of the tilt angle adjustment mechanism joint 32 or the insertion portion 86 of the telescopic mechanism joint 33, the first transmission state and the second transmission state The case where the state is switched has been described. However, for example, the present invention can be applied to a technique for switching a state of driving either a tilt angle adjusting mechanism or a telescopic mechanism as in the technique described in Patent Document 1. When the present invention is applied to the technique described in Patent Document 1, after the reciprocating operation of the electric motor is performed a plurality of times when switching from the state in which the tilt angle adjusting mechanism is driven to the state in which the telescopic mechanism is driven. Then, an electric current is supplied to the solenoid so as to pull out the rod protruding from the gear of the telescopic shaft. When switching from a state in which the telescopic mechanism is driven to a state in which the tilt angle adjusting mechanism is driven, a solenoid current is supplied to the electric motor so that the rod protruding from the tilt shaft gear is pulled out after the reciprocating operation is performed a plurality of times. It will be.

  DESCRIPTION OF SYMBOLS 10 ... Drive apparatus, 11 ... Tilt angle adjustment mechanism (1st drive mechanism), 12 ... Telescopic mechanism (2nd drive mechanism), 13 ... Power transmission mechanism, 20 ... Electric motor for tilt and telescopic (1st actuator), 21 ... 1st screw gear, 22 ... 2nd screw gear, 23 ... 1st support shaft, 24 ... Connection member, 25 ... Spur gear, 30 ... Switching member, 31 ... 2nd support shaft (1st connection member), 32 ... Tilt angle adjusting mechanism joint (first connecting member), 33 ... Telescopic mechanism joint (second connecting member), 34 ... Telescopic drive gear, 35 ... Telescopic drive shaft, 40 ... Electric motor for switching (second actuator), 41 ... Switching screw shaft, 42 ... Switching nut, 43 ... Switching member, 50 ... Control device, 51 ... Operating unit, 61 ... Spur gear, 62 ... Inner surface, 63 ... End surface, 64 ... Protrusion, 71 ... Inner surface, 2 ... end surface, 73 ... insertion portion, 81 ... spur gear 82 ... cylindrical part, 83 ... projecting portion, 84 ... inner surface, 85 ... end surface, 86 ... insertion portion.

Claims (2)

A first actuator for driving the first drive mechanism and the second drive mechanism; a first connection member connected to the first drive mechanism; a second connection member connected to the second drive mechanism; A switching member capable of switching between a first transmission state in which the driving force of the first actuator is transmitted to the first connecting member and a second transmission state in which the driving force of the first actuator is transmitted to the second connecting member; And a second actuator that selects the first transmission state or the second transmission state by driving a switching member. The control device controls the first actuator to control the first drive. In the control device of the driving device for driving the mechanism or the second driving mechanism,
When the switching member is in the first transmission state, the control A for changing the switching member to the second transmission state after rotating the first actuator in the reverse direction, and when the switching member is in the second transmission state A control device for a driving device that performs at least one of control B for changing the switching member to the first transmission state after rotating the first actuator in the reverse direction. In the control apparatus of the drive device according to claim 1,
At least one of the control A and the control B is performed after the reciprocating operation is performed a plurality of times while the reciprocating operation is the operation of rotating the first actuator in the reverse direction and the forward direction, or during the reciprocating operation. The control device of the drive device that changes the switching member to the second transmission state or the first transmission state.