WO2005078222A1

WO2005078222A1 - Vehicle door driver apparatus

Info

Publication number: WO2005078222A1
Application number: PCT/JP2005/002177
Authority: WO
Inventors: Hiroki Nasuda; Takaya Aiyama
Original assignee: Aisin Seiki Kabushiki Kaisha
Priority date: 2004-02-18
Filing date: 2005-02-14
Publication date: 2005-08-25
Also published as: JP2005231465A; JP4148153B2

Abstract

A door driver apparatus, which consumes less electric power, comprises a motor (51) disposed within a side door (2); and a mechanical power conveying mechanism (52) disposed within the side door (2) for conveying the driving power of a motor (51) to a tie rod (54). The mechanical power conveying mechanism (52) has a connection mode in which to convey the driving power of the motor to the tie rod and a disconnection mode in which to interrupt the conveyance of the driving power of the motor to the tie rod. The mechanical power conveying mechanism, when placed in the connection mode, generates a power that restrains the side door (2) from becoming unstable relative to a side body (1) of the vehicle. In the disconnection mode, a clutch operating circuit (33) supplies an electric power to the mechanical power conveying mechanism. In the connection mode, the operating circuit interrupts the electric power supply to the mechanical power conveying mechanism.

Description

Specification

Vehicle door drive

Technical field

The present invention relates to a door drive device that opens and closes a vehicle door such as a side door and a back door (tail gate) that are swingably supported by a body of a vehicle.

Background art

[0002] A conventional door drive device opens and closes a vehicle door using the driving force of a motor arranged in the vehicle door. The motor is connected to the vehicle body via an electromagnetic clutch, an arm, and a rod. The rod is rotatably connected to the vehicle body. The arm rotatably connects the rod and the vehicle door. The electromagnetic clutch is disposed in the vehicle door and can be switched between a joint state in which the driving force of the motor is transmitted to the arm and the rod and a disconnected state in which the driving force is not transmitted to the arm and the rod. The engaged electromagnetic clutch drives the arm to move the rod forward and backward with respect to the vehicle door. Thereby, the vehicle door is opened or closed. When the electromagnetic clutch is in the disengaged state, the vehicle door is not driven.

[0003] In a conventional drive device, when power is supplied to the motor and the electromagnetic clutch, the electromagnetic clutch is brought into a connected state, and the motor is driven. The driving force of the motor rotates the arm via the electromagnetic clutch. The rod is moved forward or backward with respect to the vehicle door by the rotation of the arm. The movement of the door causes the vehicle door to swing with respect to the vehicle body and open or close the vehicle door. By stopping the motor without supplying power to the motor while supplying power to the electromagnetic clutch and keeping the electromagnetic clutch in the engaged state, the vehicle door is held at an arbitrary opening angle by the braking action caused by the frictional force of the electromagnetic clutch. .

Patent Document 1: JP-A-58-181982

[0004] However, in the above-described conventional driving device, power supply to the electromagnetic clutch is indispensable in order to change and maintain the electromagnetic clutch in the engaged state. For this reason, even when the vehicle door is held at an arbitrary opening angle, power must be continuously supplied to the electromagnetic clutch, and the power consumption of the driving device is large. May not work properly. Disclosure of the invention

An object of the present invention is to provide a door drive device that consumes less power.

In order to achieve the above object, the present invention provides a vehicle door which is swingably supported on a body of a vehicle around a hinge axis to close a door opening defined by the body. A door drive device that opens and closes is provided. The door drive device is disposed between the electric drive source and the rod inside the vehicle door, a rod rotatably connected to the body, and a rod inside the vehicle door. It includes a power transmission mechanism having an operation mode including a joining mode for transmitting the driving force of the electric driving source to the rod and a non-joining mode for interrupting the transmission of the driving force of the electric driving source to the rod. The power transmission mechanism generates a restraining force against swinging of the vehicle door with respect to the body when in the joining mode. The operating means operates the power transmission mechanism in one of the selected operation modes. The control means selects an operation mode of the power transmission mechanism, and controls the operation means according to the selected operation mode. The control means controls the operating means so that power is supplied to the power transmission mechanism when the non-joining mode is selected, and cuts off power supply to the power transmission mechanism when the joining mode is selected. Control the actuation means.

[0006] In one embodiment, the door drive device measures a position detecting unit that supplies position information of the vehicle door to the control unit, and measures an elapsed time during which the vehicle door is at a predetermined angular position based on the position information. Timing means. The control means controls the operating means such that the power transmission mechanism is operated in the joining mode when the elapsed time measured by the time measuring means exceeds a predetermined value.

[0007] In one embodiment, the power transmission mechanism includes a base plate, a gear unit supported on the base plate, and a clutch unit.

In one embodiment, the power transmission mechanism further includes a reduction gear unit that links the electric drive source and the clutch unit.

[0008] In one embodiment, the clutch unit is arranged between a worm wheel gear that rotates by a driving force from an electric drive source, a rotor coaxial with the worm wheel gear, and a worm wheel gear and the rotor. Disposed between the brake disc and the rotor, and urges the brake disc toward the worm wheel gear, thereby causing the brake disc to rotate. When the brake disc and the worm wheel gear are engaged, the rotation of the worm wheel gear is transmitted to the rotor when the brake disc is engaged with the worm wheel gear.

In one embodiment, the clutch unit includes an electromagnet provided on the rotor, and when the power transmission mechanism is set to the non-joining mode, the control unit excites the electromagnet to engage the brake disc with the worm wheel gear. Cancel.

[0010] In one embodiment, the clutch unit restricts inadvertent movement of the connecting rod and holds the vehicle door at a predetermined position.

In one embodiment, the control means puts the clutch unit into the engagement mode when the vehicle door is in the open position for more than a predetermined time.

[0011] In one embodiment, the door drive device further includes a handle switch for detecting operation of the vehicle door. The control means sets the clutch unit to the non-coupling mode when the handle switch detects an operation of the vehicle door while the vehicle door is held at an arbitrary open position.

In one embodiment, the rod is pivotable with respect to the body and slidable with respect to the vehicle body.

According to the present invention, the driving force of the motor without supplying power to the power transmission mechanism is transmitted to the connecting rod. When the vehicle door is driven by the motor and when the power transmission mechanism holds the vehicle door at an arbitrary angular position, there is no need to supply power to the power transmission mechanism, so the power consumption of the door drive device is reduced. You.

Brief Description of Drawings

FIG. 1 is a diagram showing a vehicle door drive device according to a preferred embodiment of the present invention mounted on a vehicle door.

FIG. 2 is a view showing the operation of a vehicle door equipped with the vehicle door drive device according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1.

FIG. 5 is a sectional view showing a clutch unit of the vehicle door drive device according to the present invention.

FIG. 6 is a circuit diagram showing a controller for controlling the vehicle door drive device according to the present invention. FIG. 7 is a timing chart showing the operation of the controller of the vehicle door drive device according to the present invention.

FIG. 8 is a flowchart showing processing of a central processing unit relating to main operations of the present invention, among operations of a controller of a vehicle door drive device according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

A preferred embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1 to FIG. 3, a door opening 11 is formed in the side body 1 of the vehicle. A side door 2 for closing a door opening 11 is attached to the side body 1. A hinge member 25 having a hinge axis A (see FIG. 2) connects the proximal end of the side door 2 and the side body 1. The side door 2 is rotatable with respect to the side body 1 by a hinge member 25. The rotation of the side door 2 opens and closes the door opening 11. When the side door 2 is in the closed position B indicated by a solid line in FIG. 2, the door opening 11 is closed, and the entire side door 2 is substantially flush with the side body 1. When the side door 2 is in the fully open position C indicated by a two-dot chain line in FIG. 2, the door opening 11 is opened, and the tip of the side door 2 projects outward of the side body 1.

[0014] The side door 2 has a window opening 2a. The side door 2 includes a window glass 23 that opens and closes the window opening 2a, and an inner panel 21 and an outer panel 22 that are interconnected. A bag-shaped internal space D is defined between the inner panel 21 and the outer panel 22. The window glass 23 is guided by the glass run member 24 arranged in the internal space D and accommodated in the internal space D, and the window opening 2a is opened. A door driving device 5 for swinging the side door 2 with respect to the side body 1 is accommodated in the internal space D of the side door 2.

[0015] The door driving device 5 will be described in detail. The door driving device 5 includes a motor 51 as an electric driving source or a driving element, a power transmission mechanism 52, a rail mechanism 53, and a connecting rod 54.

As shown in FIG. 1, the rail mechanism 53 includes a base plate 61 and a rack gear 62. The base plate 61 has a bag shape and is formed by combining two plate parts 61c and 6Id. As shown in FIG. 4, the rack gear 62 has a T-shaped cross section, and integrally includes a pair of shoe portions 62a and 62b and a gear portion 62d. The plate parts 61c and 61d are formed with guide slots 61a and 6 lb, respectively, extending substantially parallel to the longitudinal direction of the rail mechanism 53. Rack gear The gear portion 62d of 62 is disposed between the two plate parts 61c and 61d (see FIG. 4). The guide slots 61a, 61b guide the slide of the shoe portions 62a, 62b. From this, the rack gear 62 is slidable along the guide slot 61a, 6 lb. That is, the rack gear 62 slides with respect to the base plate 61 in the longitudinal direction of the rail mechanism 53 (perpendicularly to the plane of FIG. 4). The rack gear 62 includes a flange portion 62c protruding from the shoe portion 62a to the indoor side (the right side in FIG. 3 and the right side in FIG. 4).

As shown in FIGS. 1 and 2, the bracket 12 is fixed to the front edge of the door opening 11 of the side body 1. The proximal end of the connecting rod 54 is rotatably connected to the bracket 12 via the pin 13. The connecting rod 54 reaches the internal space D through a through hole 21a (see FIG. 3) formed in the inner panel 21 of the side door 2. The tip of the connecting rod 54 is rotatably connected to the flange portion 62c of the rack gear 62 via a pin 63.

[0018] The power transmission mechanism 52 includes a base plate 71, a gear unit 52a, and a clutch unit 52b. The base plate 71 has a bag shape and is formed by combining two plate parts 71a and 71b. The gear unit 52a and the clutch unit 52b are supported by the base plate 71. The clutch unit 52b is switched between a joined state and a non-joined state (disconnected state) by an electromagnetic force. The clutch unit 52b transmits a driving force of the motor 51 to the connecting rod 54 to displace the connecting rod 54, and a non-joining mode in which the driving force of the motor 51 is blocked from transmitting to the connecting rod 54. The operation mode includes:

As shown in FIG. 1, the first gear 73 has a large-diameter gear portion 73a and a small-diameter gear portion 73b. As shown in FIG. 3, the support shaft 72 supporting the first gear 73 is fixed to two plate parts 71a and 71b constituting the base plate 71. Thus, the first gear 73 is rotatable between the plate components 71a and 71b. As shown in FIG. 1, the second gear 75 fixed to the rotating shaft 74 is combined with the small-diameter gear portion 73b of the first gear 73. As shown in FIG. 3, the rotating shaft 74 is rotatably supported by two plate parts 71a and 71b. As a result, the second gear 75 rotates integrally with the rotating shaft 74 between the plate components 71a and 71b. The rotating shaft 74 penetrates the plate part 71a of the base plate 71 and the plate part 61c of the base plate 61. The tip 74a of the rotating shaft 74 reaches between the plate parts 61c and 61d. The sector gear 76 is fixed to the tip 74a. Sector gear 76 is rack gear 6 Combined with 2. The first gear 73, the second gear 75 and the sector gear 76 constitute the gear unit 52a.

[0020] As shown in Figs. 1 and 5, the housing 81 is formed of a case 81a and a cover 81b. The motor 51 is attached to the housing 81. The housing 81 houses the clutch unit 52b and the reduction gear unit 52c. The reduction gear unit 52c links the motor 51 and the clutch unit 52b. The rotating shaft 82 is rotatably supported by the housing 81.

A worm gear 55 is fixed to an output shaft 51a of the motor 51. The worm gear 55 rotates integrally with the output shaft 51a. The worm gear 55 is combined with the worm wheel gear 56. The worm wheel gear 56 is rotatably supported relative to the rotating shaft 82 via a spacer 82a. The worm gear 55 and the worm wheel gear 56 constitute the reduction gear unit 52c. Driving and stopping of the motor 51 are controlled by the controller 3 (FIG. 6).

As shown in FIG. 5, a disk-shaped rotor 83 having a magnetic material force is fixed to a rotating shaft 82. The rotor 83 and the rotating shaft 82 rotate integrally. A disk-shaped armature 84 made of a magnetic material is supported by a rotating shaft 82 via a spacer 82a. The armature 84 and the rotary shaft 82 are relatively rotatable by the spacer 82a, and the armature 84 is movable in the axial direction of the rotary shaft 82.

[0023] Between the worm wheel gear 56 and the armature 84, a brake disc 89 and a disk-shaped sub-plate 86 are arranged! The brake disc 89 and the sub plate 86 face each other at a predetermined interval. The brake disc 89 and the sub-plate 86 are integrally connected by a spline member 93, and are supported by the rotary shaft 82 via the spline member 93. More specifically, the brake disk 89 and the sub plate 86 are rotatable relative to the rotating shaft 82 by the spline member 93 and are movable in the axial direction of the rotating shaft 82.

[0024] A disc-shaped side plate 87 is arranged between the brake disc 89 and the sub-plate 86. The side plate 87 has a back surface 87a facing the brake disc 89, and a plurality of holes 86a. The side plate 87 is rotatable relative to the spline member 93. And is connected to the rotor 83 by a connecting rod 87b. Accordingly, the side plate 87 rotates integrally with the rotor 83.

[0025] The worm wheel gear 56 has a plurality of projections 56a fitted into the plurality of holes 86a of the sub plate 86, respectively. By this fitting, the sub-plate 86 and the brake disc 89 rotate integrally with the worm wheel gear 56. The rotor 83 has a surface 83a on which a concave portion 83b is formed. An urging member such as a spring 88 for urging the armature 84 toward the brake disc 89 in the axial direction of the rotary shaft 82 is disposed in each of the concave portions 83b. An electromagnet such as an annular electromagnetic coil body 85 is arranged around the rotating shaft 82. The electromagnetic coil body 85 faces the armature 84 with the rotor 83 interposed therebetween. The rotor 83, the armature 84, the electromagnetic coil body 85, and the brake disc 89 constitute the clutch unit 52b. The operation and the stop of the clutch unit 52b are controlled by the controller 3.

[0026] Normally, the armature 84 presses the brake disc 89 by the urging force of the spring 88. As a result, the brake disc 89 is engaged with the back surface 87a of the side plate 87, and a frictional force is generated between the brake disc 89 and the side plate 87. This state is the joining mode of the clutch unit 52b. When the clutch unit 52b is in the engagement mode, a binding force equal to or greater than a predetermined value that enables torque to be transmitted from the sub-plate 86 to the rotor 83 is generated between the rotor 83 and the sub-plate 86. In the joining mode, the electromagnetic coil body 85 is excited, and is in a stopped state.

On the other hand, when the electromagnetic coil body 85 generates an electromagnetic force forming a magnetic closed loop via the rotor 83 and the armature 84, the armature 84 is attracted toward the rotor 83 and the urging force of the spring 88 The frictional movement between the brake disc 89 and the back surface 87a of the side plate 87 is released. This state is the non-joining mode of the clutch unit 52b. In the non-joining mode, the binding force between the rotor 83 and the side plate 87 is released, so that torque transmission from the side plate 87 to the rotor 83 becomes impossible. In the non-joining mode, the electromagnetic coil body 85 is in an excited (operated) state.

[0028] The rotating shaft 82 penetrates through the cover 81b, and the tip 82b of the rotating shaft 82 has a Jing is outside 81. An output gear 90 is fixed to the distal end portion 82b so as to rotate integrally with the rotary shaft 82. The output capuon gear 90 is combined with the large-diameter gear portion 73a of the first gear 73.

Next, the operation of the door driving device 5 will be described.

When the motor 51 is driven, the worm wheel gear 56 rotates via the worm gear 55. When the clutch unit 52b is in the engagement mode, the rotation of the worm wheel gear 56 is transmitted to the motor 83, and the rotating shaft 82 rotates. When the rotating shaft 82 rotates, the output pinion gear 90 rotates, and the sector gear 76 rotates via the first gear 73, the second gear 75, and the rotating shaft 74. The rotation of the sector gear 76 causes the rack gear 62 to slide along the guide slots 6 la and 61 b, whereby the connecting rod 54 slides substantially horizontally forward or backward with respect to the side door 2. When the connecting rod 54 moves forward of the side door 2, the connecting rod 54 pushes the bracket 12 toward the side body 1. As a result, the side door 2 swings about the hinge axis A in the first direction and opens with respect to the side body 1. At this time, most of the connecting rod 54 is exposed from the side door 2 (see a two-dot chain line in FIG. 2).

On the other hand, when the connecting rod 54 moves to the rear of the side door 2, the connecting rod 54 pulls the bracket 12 against the side body 1. As a result, the side door 2 swings about the hinge axis A in the second direction opposite to the first direction, and performs the closing operation on the side body 1. At this time, most of the connecting rod 54 is retracted into the side door 2 (see the solid line in FIG. 2).

[0031] When the motor 51 is stopped and the clutch unit 52b is in the engagement mode, the rotation of the rotor 83 with respect to the worm wheel gear 56 is restricted. The engagement between the worm gear 55 and the worm wheel gear 56 in the reduction gear unit 52c acts as a load, and the movement of the connecting rod 54 with respect to the side door 2 is restricted. That is, the swing of the side door 2 with respect to the side body 1 is restricted. Therefore, the side door 2 is held at a predetermined position.

On the other hand, when the motor 51 is stopped and the clutch unit 52b is in the non-joining mode, the rotation of the rotor 83 with respect to the worm wheel gear 56 is allowed. The engagement between the worm gear 55 and the worm wheel gear 56 in the reduction gear unit 52c does not become a load, and the connecting rod 54 can move freely with respect to the side door 2. That is, the swing of the side door 2 with respect to the side body 1 is not restricted. Therefore, although the motor 51 is stopped, The side door 2 can be opened and closed.

An annular magnet 91 is fixed to the outer peripheral edge of the rotor 83. On the outer surface of this magnet 91, a plurality of sets of NZS poles are alternately magnetized. In the housing 81, a position sensor 92 (see FIG. 6) is arranged so as to face the magnet 91. The position sensor 92 is fixed to the housing 81 and includes at least a pair of Hall elements facing the outer surface of the magnet 91. Each Hall element generates a signal whose potential changes according to the polarity (NZS) of the outer surface of the magnet 91. The phases of the signals of each pair of Hall elements are shifted from each other by 90 degrees. The position sensor 92 detects the rotation and the rotation direction of the rotor 83 based on the signal of the Hall element. The position sensor 92 supplies a detection signal (position information) to the controller 3. The controller 3 calculates the swing speed, swing direction, and current position (door opening angle) of the side door 2 based on the detection signal.

As shown in FIG. 1, the plate component 71 a of the base plate 71 is fixed to the plate component 61 c of the base plate 61 of the rail mechanism 53. The plate part 71b of the base plate 7 is fixed to the cover 81b of the housing 81. Thus, the base plate 71 is supported by the housing 81 while supporting the base plate 61, and the motor 51, the power transmission mechanism 52, and the rail mechanism 53 are united.

The door driving device 5 includes a rail mechanism 53 that guides the connecting rod 54 in the direction of movement of the connecting rod 54 accompanying the opening and closing operation of the side door 2. The clutch unit 52b has a function of transmitting the driving force of the motor 51 to the connecting rod 54, and a so-called door check function of holding the side door 2 at a predetermined position by restricting inadvertent movement of the connecting rod 54. prepare for! / Since a dedicated door check device is not required, the size of the door drive device 5 is reduced.

[0036] The case 81a of the housing 81 is fixed to the inner panel 21 of the side door 2, and the door driving device 5 holds the window glass 23 in the internal space D of the side door 2 with relatively heavy weight. It is located above the base end of the side door 2 avoiding the position. Thus, the position of the center of gravity of the side door 2 is brought closer to the swing center (hinge axis A) of the side door 2, and the swing of the side door 2 due to inertia is suppressed.

Therefore, the present invention can provide a small-sized door driving device 5 that can suppress the swing of the side door 2 due to inertia. [0038] The controller 3 will be described.

As shown in FIG. 6, the controller (control means) 3 includes a central processing unit (CPU) 31, a motor drive circuit 32, and a clutch actuation circuit (actuation means) 33.

[0039] The motor drive circuit 32 is electrically connected to the CPU 31, and adjusts the power supply from the battery 4 mounted on the vehicle to the motor 51 in accordance with the operation signal from the CPU 31. Is driven forward or backward, or stopped.

[0040] The clutch operation circuit 33 is electrically connected to the CPU 31, and adjusts the power supplied from the notebook 4 to the clutch unit 52b in accordance with the operation signal from the CPU 31 to operate the clutch unit 52b in the selected operation. Operate in mode. A pulse width modulation circuit 37 for changing a power value supplied to the clutch unit 52b is electrically connected between the CPU 31 and the clutch unit 52b. The CPU 31 is connected to the input circuits 34 and 38. A start switch 35 provided on the wireless key of the vehicle and a handle switch 36 provided on the side door 2 are electrically connected to the CPU 31 via an input circuit 34. The position sensor 92 is electrically connected to the CPU 31 via the input circuit 38! The CPU 31 supplies a drive signal to the motor 51 and an operation signal to the clutch unit 52b in accordance with operation signals supplied from the start switch 35 and the middle switch 36. The movable contacts of the start switch 35 have a door open position for opening the side door 2, a door close position for closing the side door 2, and a neutral position therebetween.

The CPU 31 includes a timer (measuring means) 3 la. The timer 3 la measures the time required for the side door 2 to move to the closed position force fully open position and the time required for the side door 2 to move from the fully open position to the closed position.

With reference to FIG. 7, the opening / closing operation of the side door 2 and the control of the controller 3 will be described.

When the occupant turns on the start switch 35 while the side door 2 is in the closed position B, the movable contact of the start switch 35 is placed in the door open position. In this case, the electric power from the notch 4 is supplied to the motor 51, and the motor 51 rotates forward. On the other hand, the electric power from the notch 4 is not supplied to the clutch unit 52b, and the clutch unit 52b is maintained in the engagement mode. In this case, the driving force of the motor 51 is transmitted to the rack gear 62 of the rail mechanism 53 via the power transmission mechanism 52, and the connecting rod 54 moves so as to be exposed from the side door 2. Then, the side door 2 opens.

When the occupant turns on the start switch 35 again to stop the opening operation while the side door 2 is being opened by the motor 51, the movable contact of the start switch 35 is placed at the neutral position. . In this case, the power supply to the motor 51 is cut off and the motor 51 stops. The interruption of the power supply to the clutch unit 52b is continued, and the clutch unit 52b is maintained in the connection mode. Therefore, the side door 2 is held at a position opened at an arbitrary predetermined angle.

In a state where the angle of the side door 2 is held by the clutch unit 52b, when the occupant operates the door outside handle to turn on the handle switch 36 to open the side door 2, Electric power from the notch 4 is supplied to the clutch unit 52b, and the electromagnetic coil 85 is excited. As a result, the clutch unit 52b enters the non-joining mode. Thus, the occupant can manually open the side door 2. When the controller 3 detects that the side door 2 is located at the fully open position C based on the detection signal of the position sensor 92, the controller 3 cuts off the power supply to the clutch unit 52b. As a result, the clutch unit 52b enters the joining mode again, and the side door 2 is held at the fully open position C.

Next, control for holding the side door 2 at a predetermined angular position will be described with reference to FIG.

While the side door 2 is being opened by the drive of the motor 51, when the occupant turns on the start switch 35 again to stop the opening operation, the CPU 31 outputs the side door based on the detection signal of the position sensor 92. Determine whether door 2 is in the open position (Step Sl).

If side door 2 is at closed position B, CPU 31 determines that side door 2 is not located at the open position (NO in step S1). Then, the CPU 31 resets the count value of the timer 31a in step S2, and supplies an operation stop signal to the clutch operation circuit 33 in step S3 so as to put the clutch unit 52b in the engagement mode.

On the other hand, when CPU 31 determines that side door 2 is in the open position (YES in step S1), CPU 31 determines whether the count value (elapsed time) of timer 31a has reached a predetermined value. (Step S4). When the measured value has not reached the predetermined value (NO in step S4), the CPU 31 continues counting of the timer 3 la (step S5). An example of the predetermined value of the elapsed time is that the side door 2 is closed. This is the time required for the motor 51 to open and close without stopping even from the position B to the fully open position C.

[0048] When the count value of timer 31a reaches a predetermined value, CPU 31 determines that side door 2 is stopped at the open position (YES in step S4). The CPU 31 supplies an operation stop signal to the clutch operation circuit 33 to set the clutch unit 52b to the engagement mode (step S6).

[0049] In step S7, the CPU 31 determines whether or not the handle switch 36 is turned on. When the handle switch 36 is turned on (YES in step S7), the CPU 31 supplies an operation signal to the clutch operation circuit 33 to set the clutch unit 52b to the non-coupling mode (step S8), and the timer 31a The count value is reset (step S9).

[0050] Preferably, the embodiment may be modified as follows!

The clutch unit 52b enters the non-joining mode when the friction between the brake disc 89 and the back surface 87a of the side plate 87 is released. In the non-joining mode of the clutch unit 52b, if the torque cannot be transmitted, the friction between the brake disc 84c and the front surface 83a of the rotor 83 or the brake disc 89 and the back surface 87a of the side plate 87 causes the friction force to be smaller than the binding force in the joining mode. A state in which a small binding force is generated may be used. The power supplied to the clutch unit 52b in the non-joining mode is adjusted by the pulse width modulation circuit 37. From these facts, the non-joining mode in the present invention includes not only a state where no binding force is generated but also a state where a binding force is generated, though slightly.

[0051] In the preferred embodiment, the activation switch 35 is provided on the wireless key of the vehicle. However, the present invention is not limited to this, and the activation switch 35 may be provided on the door outside handle, the door inside handle, or the instrument panel of the vehicle. good. The handle switch 36 may be a capacitive touch sensor provided on the door outside handle or the door inside handle. The swing of the side door may be detected based on the detection signal of the position sensor 92, and the side door 2 may be manually opened and closed to detect the intention of the occupant.

Claims

The scope of the claims

[1] A door driving device which is swingably supported on a body of a vehicle about a hinge axis and opens and closes a vehicle door for closing a door opening defined by the body, wherein: An electric drive source arranged in the

A rod rotatably connected to the body,

A joining mode in which the driving force of the electric driving source is transmitted to the rod, the joining mode being disposed between the electric driving source and the rod in the vehicle door, and the driving force of the electric driving source is transmitted to the rod; A power transmission mechanism having an operation mode including a non-joining mode for interrupting transmission, wherein the restraint prevents the vehicle door from swinging with respect to the body when in the joining mode. Said power transmission mechanism for generating a force,

Operating means for operating the power transmission mechanism in one selected operation mode; and control means for selecting an operation mode of the power transmission mechanism and controlling the operation means in accordance with the selected operation mode, wherein the non-joining When the mode is selected, the operation means is controlled so that power is supplied to the power transmission mechanism, and when the joining mode is selected, the operation means is configured to cut off the power supply to the power transmission mechanism. A door drive device comprising: the control means for controlling the means.

[2] position detecting means for supplying position information of the vehicle door to the control means,

A timer for measuring an elapsed time during which the vehicle door is at a predetermined angular position based on the position information,

The door drive according to claim 1, wherein the control means controls the operation means so as to operate the power transmission mechanism in a joining mode when the elapsed time measured by the time measurement means exceeds a predetermined value. apparatus.

3. The door drive device according to claim 1, wherein the power transmission mechanism includes a base plate, a gear supported on the base plate, and a clutch unit.

4. The door drive device according to claim 3, wherein the power transmission mechanism further includes a reduction gear unit that links the electric drive source and the clutch unit.

[5] The clutch unit includes:

A worm wheel gear that rotates with a driving force of the electric driving source force; A rotor coaxial with the worm wheel gear,

A brake disk disposed between the worm wheel gear and the rotor; and a brake disk disposed between the brake disk and the rotor to urge the brake disk toward the worm wheel gear, Claims: A biasing member for engaging a brake disc with the worm wheel gear, wherein the rotation of the worm wheel gear is transmitted to the rotor when the brake disc and the worm wheel gear are engaged. 4, door drive.

[6] The clutch unit includes an electromagnetic coil body provided on the rotor, and when the power transmission mechanism is set to the non-joining mode, the control unit excites the electromagnetic coil body to release the brake disk. 6. The door drive device according to claim 5, wherein the engagement between the worm wheel gear and the worm wheel gear is released.

7. The door drive device according to claim 1, wherein the clutch unit regulates an inadvertent movement of the connecting rod and holds the vehicle door at a predetermined position.

8. The door drive device according to claim 1, wherein the control unit sets the clutch unit to the joining mode when the vehicle door is in the open position for more than a predetermined time.

[9] The vehicle switch may further include a handle switch for detecting operation of the vehicle door, and the control unit may be configured to set the handle switch to the vehicle door when the vehicle door is held at an arbitrary open position. 2. The door drive device according to claim 1, wherein when the operation is detected, the clutch unit is set to the non-coupling mode.

10. The door drive device according to claim 1, wherein the rod is capable of pivoting with respect to the body and slidable with respect to the vehicle body.