JP2003254394A - Intermittent power mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an intermittent power mechanism small and lightweight, reduce cost, and reduce power consumption. <P>SOLUTION: A clutch gear 42 is installed between a driving pinion gear 40 rotatively driven with a driving electric motor 30 and an idle gear 41 meshing with a rack gear 24. The clutch gear 42 is driven with a driving link 57, and the driving link 57 is connected to a crank pin 61 of a crank plate 60 rotatively driven with a changing over electric motor 52. The changing over electric motor 52 rotatively drives the crank plate 60 every 180 degrees, the driving link 57 reciprocates according to the rotation of the crank plate 60, and changes over the clutch gear 42 from a power transmission position where the driving pinion gear 40 meshes with the idle gear 41 to a power shut off position where the meshing with the idle gear 41 is released, and vice versa. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power connection / disconnection mechanism that moves an intermediate gear meshing with a drive gear and a driven gear to connect and disconnect the power transmitted between the drive gear and the output gear.

[0002]

2. Description of the Related Art A power transmission / reception mechanism transmits power transmitted between a drive source such as an electric motor for rotationally driving a drive gear and a driven member driven by a driven gear meshing with the drive gear. This is for switching between the state and the power cutoff state. For example, an electromagnetic clutch is known as such a power connection / disconnection mechanism. The electromagnetic clutch has a drive side clutch plate connected to the drive source side and a driven side clutch plate connected to the driven member side. Then, the electromagnetic attraction force generated by supplying the electric current to the electromagnet moves these clutch plates into the close contact state and the separated state, so that the power transmission from the electric motor to the driven member can be interrupted. Has become.

Such an electromagnetic clutch is used, for example, in an actuator unit mounted on an automobile or the like to automatically open and close a back door of the vehicle. This actuator unit has a rack bar movably provided in a substantially vertical direction of the vehicle, a power unit for axially driving the rack bar, and a connecting rod for connecting the rack bar and the back door. The back door is opened and closed by linearly reciprocating. The power unit has an electric motor, and the output of the electric motor is transmitted via a drive gear to an output pinion gear that meshes with a rack gear provided on a rack bar. When the back door is automatically opened and closed, the electric motor causes the rack bar to reciprocate through the output pinion gear, and this reciprocating motion is transmitted to the back door through the connecting rod to perform the opening and closing operation. Will be done. The electromagnetic clutch is provided between the electric motor and the output pinion gear in this power unit, and can switch the electric motor and the output pinion gear between the connected state and the disconnected state.

In such an actuator unit,
When the opening and closing of the back door is performed manually, the electric motor is rotated via the output pinion gear as the back door moves, and the opening and closing operation becomes heavy and the operation feeling thereof deteriorates. Therefore, an electromagnetic clutch is provided so that when the back door is manually opened and closed, the electric motor and the back door are shut off so that the operation feeling of opening and closing the back door can be changed from that of a normal back door that does not have an automatic opening and closing device. It has been improved to the same extent.

[0005]

However, in such an actuator unit, an electric motor with a large output is used to reliably drive a large and heavy back door. Further, the electromagnetic clutch is provided on the output pinion gear side closer to the rack bar in order to reduce the influence of friction of the mechanism section. Therefore, the output of the electric motor that is input to the electromagnetic clutch is decelerated, that is, boosted, and becomes larger. Therefore, the electromagnetic clutch used in such an actuator unit has a large power transmission capacity, is large and heavy, and is expensive.

Further, in the electromagnetic clutch, since the electromagnetic attraction force is generated by supplying the electric power to the electromagnet, the electric power is consumed during the power transmission state. Therefore, the power consumed by the power connection / disconnection mechanism increases, and particularly when the electromagnetic clutch is used in the actuator unit mounted on the vehicle, the load on the battery mounted on the vehicle increases.

An object of the present invention is to reduce the size and weight of the power interruption mechanism.

Another object of the present invention is to reduce the cost of the power interruption mechanism.

Another object of the present invention is to reduce the power consumption of the power interruption mechanism.

[0010]

A power connection / disconnection mechanism of the present invention is rotatably provided on a support base and is driven by a drive source to be rotated, a driven gear for driving a driven member, and the drive. A power interrupting mechanism having an intermediate gear that is movable between a power transmission position that meshes with both a gear and the driven gear and a power cut-off position that meshes with one of the gears, and is rotatably provided with respect to the support base. A rotary member and a drive link that rotatably supports the intermediate gear and is connected to an eccentric shaft provided on the rotary member, and a drive link that reciprocates in the longitudinal direction by the rotary motion of the rotary member, and rotationally drives the rotary member. However, a drive means for switching the intermediate gear between the power transmission position and the power cut-off position is provided.

In the power connecting / disconnecting mechanism of the present invention, the drive link is located on a straight line connecting the center of the rotating member and the center of the eccentric shaft when the intermediate gear is in the power transmitting position. To do.

The power connecting / disconnecting mechanism of the present invention is characterized in that the rotating member is rotationally driven by every 180 degrees by the driving means.

In the power connecting / disconnecting mechanism of the present invention, the driving means is arranged with a phase difference of 180 degrees with respect to a pair of cylindrical surfaces that slides on the outer peripheral surface of the switch member to turn on the switch member. A pair of recesses for turning off the switch member are formed, and the switching electric motor is controlled by a control unit having a switching plate that rotates integrally with the rotating member.

The power connection / disconnection mechanism of the present invention is swingably attached to the support base by a support shaft, and is swingably attached to the support base and a swing link connected to the drive link by a connecting shaft. A driving member that includes a swinging member that rotatably supports the intermediate gear and a connecting link that is connected to the connecting shaft and is connected to a moving shaft of the swinging member. A link supports the intermediate gear swingably.

In the power connecting / disconnecting mechanism of the present invention, the swing member is swingably provided about the rotation shaft of the drive gear, and the rotation shaft of the drive gear is in a state in which the intermediate gear meshes with the drive gear. It is characterized by swinging around.

In the power connecting / disconnecting mechanism of the present invention, the driven gear is meshed with a rack gear formed on a reciprocating member provided reciprocally in the vehicle, and the reciprocating member reciprocates to open / close the vehicle. It is characterized in that the freely installed opening / closing member is automatically opened / closed.

According to the present invention, a rotatable rotary member, a drive link connected to the eccentric shaft of the rotary member, and drive means for rotationally driving the rotary member are provided, and the drive link reciprocates in the longitudinal direction. As a result, the intermediate gear is moved between the power transmission position and the power cut-off position, so that the structure is simplified, the power connection / disconnection mechanism can be reduced in size and weight, and the cost thereof can be reduced.

Further, in the present invention, when the intermediate gear is in the power transmission position, the drive means stops and does not consume power, so that power consumption of this power transmission mechanism can be reduced.

Further, in the present invention, when the intermediate gear is at the power transmission position, the drive link is positioned on a straight line passing through the center of the rotating member and the center of the eccentric shaft, and the drive link is moved to the intermediate gear. Since it is made impossible to move in the disengagement direction, the meshing of the intermediate gear can be stabilized.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing a part of a vehicle having an actuator unit provided with a power connection / disconnection mechanism according to an embodiment of the present invention, showing a state in which a back door is fully closed. FIG. 2 is a side view showing a part of the vehicle shown in FIG. 1 when the back door is in a fully opened state. FIG. 3 is a perspective view showing details of the actuator unit shown in FIG. 4 is an explanatory diagram showing an outline of the control device for the electric motor shown in FIG. 3, and FIG. 5 is a circuit diagram of the control device shown in FIG.

As shown in FIGS. 1 and 2, a back door 2 as an opening / closing member is provided at the rear end of the vehicle 1.
The back door 2 is openably and closably attached to the vehicle 1 via a hinge 4 attached to a rear end portion of the vehicle roof 3.
Then, as shown in FIG. 1, the vehicle 1 pivots between a fully closed state that is substantially vertical to the vehicle 1 and a fully opened state that is substantially horizontal to the vehicle as shown in FIG. The rear end is opened and closed. A ball stud 5 is fixed to the left side of the back door 2 in the vehicle width direction. Also, the vehicle 1
A gas damper 6 that expands and contracts as the back door 2 is opened and closed is attached between the rear end portion and the back door 2 so as to reduce the load in the opening and closing direction of the back door 2.

The vehicle 1 is provided with an actuator unit 10 for automatically opening and closing the back door 2. The actuator unit 10 includes a connecting rod 11, a slide mechanism 12, and a power unit 13, and the pillar 1 on the vehicle left side adjacent to the back door 2 is provided.
It is arranged in the inside of 4.

The connecting rod 11 has a structure in which ball sockets 15 and 16 are fixed to both ends of a rod made of steel, and when the ball socket 15 is engaged with the ball stud 5 of the back door 2, It is swingably connected to the door 2.

The slide mechanism 12, as shown in FIG.
It has a channel 20 and a rack bar 21 as a reciprocating member movably arranged inside the channel 20. The channel 20 is formed in the shape of a rectangular pipe having a straight hollow inside, and a slot 22 extending in the axial direction from a substantially central portion in the longitudinal direction is formed on a side surface of the channel 20. Further, on the side surface opposite to the side surface where the slot 22 is formed, there is formed a window portion 23 that opens at a substantially middle portion in the longitudinal direction. Rack bar 21
Is formed in the shape of a quadrangular prism whose length dimension is approximately half that of the channel 20, and is reciprocally movable in the channel 20 substantially vertically with respect to the vehicle. A rack gear 24 arranged in the axial direction is formed on a side surface of the rack bar 21 that faces the window portion 23, and a tip portion that is an upper side with respect to the vehicle 1 is formed on a side surface opposite to the side surface on which the rack gear 24 is formed. At, the ball stud 25 is fixed. The ball stud 25 projects to the outside of the channel 20 through the slot 22 and can move along the slot 22 as the rack bar 21 moves. The other end of the connecting rod 11, that is, the ball socket 16 is swingably connected to the ball stud 25. That is, the rack bar 21 and the back door 2 are connected via the connecting rod 11, and the displacement thereof is transmitted to the back door 2 via the connecting rod 11 by reciprocating the rack bar 21 in the axial direction. The back door 2 will be opened and closed.

The power unit 13 has a drive electric motor 30 as a drive source and a power connection / disconnection mechanism 31, and is fixed to a substantially central portion of the channel 20 at a base plate 32 as a support. A worm gear mechanism 33 is connected to the drive electric motor 30, and is fixed to the base plate 32 integrally with the worm gear mechanism 33. The output of the driving electric motor 30 is decelerated by the worm gear mechanism 33 and is output from the output shaft 34 of the worm gear mechanism 33 whose axial direction is perpendicular to the base plate 32.

The power connecting / disconnecting mechanism 31 includes a drive pinion gear 40 as a drive gear and an idle gear 41 as a driven gear.
And a clutch gear 42 as an intermediate gear. The drive pinion gear 40 is rotatably provided on the base plate 32, is connected to the output shaft 34 of the worm gear mechanism 33, and is rotationally driven by the worm gear mechanism 33, that is, the drive electric motor 30.

The idle gear 41 is the drive pinion gear 40.
It is rotatably provided on the base plate 32 apart from the rack gear 2 of the rack bar 21 at the window 23.
It is meshed with 4. That is, when the idle gear 41 rotates, the rotation causes the rack bar 21 as a driven member to reciprocate via the rack gear 24, and the back door 2
Will be opened and closed.

The clutch gear 42 has a large-diameter gear 42a as a first gear portion having a large number of teeth, and a second gear having a smaller number of teeth than the large-diameter gear 42a, which rotates coaxially and integrally with the large-diameter gear 42a.
And a small-diameter gear 42b as a gear portion of the. As for the clutch gear 42, the large diameter gear 42a is the drive pinion gear 40.
The rotary shaft of the drive pinion gear 40 is rotatably supported on the intermediate shaft 44 by a swing member 43 that is swingably provided on the base plate 32 about the rotary shaft of the drive pinion gear 40. That is, the clutch gear 42 is centered on the rotation axis of the drive pinion gear 40.
The small diameter gear 42b is swingable between a power transmission position where it meshes with the idle gear 41 and a power cutoff position where the small diameter gear 42b and the idle gear 41 disengage. The clutch gear 42 transmits the rotation of the drive pinion gear 40 to the idle gear 41 when it reaches the power transmission position, and shuts off the power transmission between the drive pinion gear 40 and the idle gear 41 when it reaches the power cut-off position. It will be. It should be noted that in the present embodiment, the clutch gear 42 is provided so as to be in constant mesh with the drive pinion gear 40 so as to be swingable around the rotation axis of the drive pinion gear 40, but the present invention is not limited to this.
May be swingably provided around the rotation shaft of the idle gear 41 so that the clutch gear 42 always meshes with the idle gear 41. In this case, the clutch gear 42 is
It meshes with the drive pinion gear 40 at the power transmission position, and disengages with the drive pinion gear 40 at the power cut-off position. Further, in the present embodiment, the clutch gear 42 has a large-diameter gear 42a and a small-diameter gear 42b provided so as to rotate coaxially and integrally with the large-diameter gear 42a, so that the drive pinion gear 40 is rotated. The speed is reduced by two steps and is transmitted to the idle gear 41, but the invention is not limited to this, and one speed reduction by a normal spur gear or one in which the rotation of the drive pinion gear 40 is accelerated and transmitted to the idle gear 41. Any of these may be used as long as it can transmit power between the drive pinion gear 40 and the idle gear 41.

A switching mechanism 50 is provided in the power connecting / disconnecting mechanism 31 to swing the clutch gear 42. The switching mechanism 50 includes a link portion 51 and a switching electric motor 52 as a driving unit that drives the link portion 51.

The link portion 51 is swingably attached to a fixed block 53 fixed to the base plate 32 via a support pin 54 as a support shaft so as to be swingable.
have. A connecting pin 56 serving as a connecting shaft is provided at a tip end of the swing link 55, which is opposite to the supporting pin 54 side away from the supporting pin 54, and a drive link 57 is provided on the connecting pin 56. It is swingably connected. Further, one end of a connecting link 58 formed to have substantially the same size as the swinging link 55 is swingably connected to the connecting pin 56, and the other end of the connecting link 58 is connected to the swinging member 4.
3 is swingably connected to a moving pin 59 serving as a moving shaft provided on the No. 3. Therefore, the swinging motion of the swinging link 55 moves the moving pin 59 via the connecting link 58, and the intermediate shaft 44 also moves integrally with the moving pin 59. Therefore, the clutch gear 42, which is rotatably supported by the connecting link 58 via the swinging member 43, moves as the swinging link 55 swings.

The other end of the drive link 57 is connected to a crank pin 61 as an eccentric shaft provided on a crank plate 60 as a rotating member that is rotatable with respect to the base plate 32. The crank pin 61 is provided on the crank plate 60 so as to be eccentric from the center thereof, that is, the rotation center axis T, and is rotated about the rotation center axis T as the crank plate 60 rotates. In the crank plate 60, the crank pin 61 is located on the straight line A connecting the rotation center axis T and the connecting pin 56 by the switching electric motor 52, that is, the rotation center axis T and the center of the crank pin 61 are connected. The drive link 57 is located on a straight line and is rotationally driven every 180 degrees. Therefore, the drive link 5
7 is reciprocated in the longitudinal direction by the switching electric motor 52 to rock the rocking link 55 and rock the clutch gear 42 between the power transmission position and the power cut-off position. When the clutch gear 42 is in the power transmission position, the crank pin 61 is in the first dead center position, which is closer to the clutch gear 42 than the rotation center axis T of the crank plate 60 on the straight line A, and is in the power cut-off position. In this case, the second dead center position on the straight line A is located on the side opposite to the clutch gear 42 with respect to the rotation center axis T of the crank plate 60.

As shown in FIG. 4, the crank plate 60
Is fixed to an output shaft 63 of a worm gear mechanism 62 connected to a switching electric motor 52 as an electric motor, and is rotationally driven by the switching electric motor 52 via the worm gear mechanism 62. The switching mechanism 50 is provided with a control device 70 as control means for controlling the switching electric motor 52 to rotate the crank plate 60 every 180 degrees.

The control device 70 includes the switching plate 7
1 has a switching mechanism 73 having a limit switch 72 as a switch member and a control device main body 74. The switching plate 71 is fixed to the output shaft 63 of the worm gear mechanism 62 and rotates together with the crank plate 60. The outer peripheral surface of the switching plate 71 has a pair of cylindrical surfaces 71.
a, 71b and a pair of recesses 7 arranged between the cylindrical surfaces 71a, 71b with a phase difference of 180 degrees from each other.
1c and 71d are formed. The limit switch 72 has its switching direction directed toward the center of rotation of the switching plate 71, and
1a and 71b are in sliding contact with each other to be turned on, and in the recesses 71c and 71d, the switching plate 7
It is set to an off state apart from 1. Recess 71
c is provided at a position where the limit switch 72 is turned off when the crank plate 60 reaches the first dead center position, and the concave portion 71d has the crank plate 60 at the second position.
The limit switch 72 is in the off position when the dead center position is reached. The limit switch 72 is turned on in each of the cylindrical surfaces 71a and 71b. The limit switch 72 is connected to the control device body 74.

In addition to the above-mentioned limit switch 72, the control device main body 74 includes power supply terminals 52a and 52b of the switching electric motor 52 and a battery 75 mounted on the vehicle 1.
Are connected, that is, the control device 70 has the circuit configuration shown in FIG. 5 as a whole.

A relay switch 78 having a changeover switch 76 and a coil portion 77 is provided in the control device main body 74,
A transistor 79 that controls the supply of current to the coil portion 77 is provided. The relay switch 78 controls the supply of current to the coil section 77,
The switch plate 76b connected to the base terminal 76a of the changeover switch 76 is of a contact switching type that is switched between a switch off state connected to the changeover terminal 76c and a switch on state connected to the changeover terminal 76d. The base terminal 76a is connected to one power supply terminal 52a of the switching electric motor 52, the switching terminal 76c is connected to the other power supply terminal 52b of the switching electric motor 52, and the switching terminal 76d is connected to the battery 7.
Connected to 5. In addition, the switching electric motor 52
The other power supply terminal 52b is connected to the switching terminal 76c and grounded. Therefore, when the relay switch 78 is switched on, the switching electric motor 52 rotates by being supplied with the current from the battery 75, and when it is switched off, the power supply terminal 52.
The a and 52b are short-circuited to stop the rotation.

The battery 75 is connected to the switching terminal 76d and also to one end of the coil portion 77, and the other end of the coil portion 77 is grounded via the limit switch 72 and the collector 7 of the transistor 79 is connected.
9a. Therefore, when the limit switch 72 is turned on, the coil portion 77 is connected to the battery 7
The current from 5 will flow. The emitter 79b of the transistor 79 is grounded, and the base 79c of the transistor 79 receives the base signal S from the controller main body 74. Therefore, when the base signal S is input to the base 79c, the transistor 79 becomes conductive between the collector 79a and the emitter 79b, and the current from the battery 75 flows through the coil portion 77.

FIG. 6 is a front view showing the details of the power unit shown in FIG. 3 when the intermediate gear is in the power transmission position, and FIG. 7 is the power unit shown in FIG. It is a front view which shows the detail when it becomes.

Next, the operation of the actuator unit 10 having such a structure will be described.

As shown in FIG. 6, the crank plate 60
When reaches the first dead center position, as described above, the crank pin 61 is located on the straight line A connecting the rotation center axis T of the crank plate 60 and the connecting pin 56. The clutch gear 42 is the drive pinion gear 40.
Is in a power transmission position where it meshes with the idle gear 41.

At this time, the drive link 57 has the support pin 5
The connecting pin 56 is located at a position beyond the straight line B connecting the center of 4 and the center of the moving pin 59 to the opposite side of the crank plate 60.
It is a toggle position that locates the center of. Further, at this time, the limit switch 72 moves the crank plate 60.
The recess 71 of the switching plate 71 that rotates integrally with
The electric motor 5 for switching is located at the position c and is in the off state.
It is assumed that the power supply to 2 is stopped. In addition,
In the present embodiment, the toggle position is the support pin 54.
The center of the connecting pin 56 is located on the opposite side of the crank plate 60 from the straight line B connecting the center of the connecting pin 56 with the center of the moving pin 59. It may be located above. here,
The clutch gear 4 which is in the power transmission position and transmits power from the drive pinion gear 40 to the idle gear 41
At 2, the reaction force acting in the direction in which the idle gear 41 is disengaged is generated. However, in the power on / off mechanism 31 of the present invention, when the power transmission position is reached, the drive link 57 is at the toggle position, and at this time, the crank pin 61 is at the first dead center position of the crank plate 60. Since it is positioned, the clutch gear 42
The disengagement of the meshes will be suppressed. That is, in order for the swinging member 43 to swing in the direction in which the mesh between the clutch gear 42 and the idle gear 41 is disengaged, the connecting pin 5
Since the position of 6 is the toggle position, the swing link 5
It is necessary to move 5 in a direction away from the crank plate 60, that is, counterclockwise in the figure. However, since the crank plate 60 is at the first dead center position at this time, the counterclockwise swing of the swing link 55 is restricted by the drive link 57 that connects the connecting pin 56 and the crank pin 61. As a result, the clutch gear 42 cannot move in the direction out of mesh with the idle gear 41.

As described above, in the power connection / disconnection mechanism 31 of the present invention, when the clutch gear 42 is in the power transmission position, the drive link is formed on a straight line passing through the rotation center axis T of the crank plate 60 and the center of the crank pin 61. Since 57 is positioned so that the drive link 57 cannot move in the direction in which the mesh of the clutch gear 42 is disengaged, the mesh of the clutch gear 42 can be stabilized.

When the open / close button of the back door open / close switch (not shown) is operated with the clutch gear 42 in the power transmission position, the back door 2 is opened / closed. That is, electric power from a driving device (not shown) is supplied to the driving electric motor 30 to rotationally drive the drive pinion gear 40, and this rotation is transmitted to the idle gear 41 via the clutch gear 42. The rotation of the idle gear 41 causes the rack bar 21 to reciprocate in the vertical direction with respect to the vehicle 1 via the rack gear 24, so that the back door 2 moves between the fully open state and the fully closed state shown in FIGS. Will open and close.

Next, when a sensor (not shown) recognizes that the back door 2 is manually opened and closed, the clutch gear 42 is switched to the power cut-off position. In this case, a signal from a sensor (not shown) is input to the control device main body 74, and the control device main body 74 outputs the base signal S to the base 79c of the transistor 79 in response to this signal. When the base signal S is input to the base 79c, the coil portion 77 is excited by the current flowing, and the relay switch 78 is turned on to supply power to the switching electric motor 52. Therefore, the crank motor 60 is rotated by the switching electric motor 52, the drive link 57 is moved to the longitudinal crank plate 60 side, and the swing link 55 is also moved to the crank plate 60 side accordingly. At this time, the switching plate 71 also rotates as the crank plate 60 rotates, and the limit switch 72 moves from the recess 71c to the cylindrical surface 71.
It comes into sliding contact with a and is turned on. The base signal S input to the base 79c is designed to be released after the limit switch 72 has been turned on.
After the current flowing through 9 is stopped, the coil portion 77 is grounded through the limit switch 72, so that the relay switch 78 is maintained in the switch-on state.

Then, when the switching electric motor 52 continues to rotate and the switch plate 76b rotates 180 degrees, the limit switch 72 is positioned in the recess 71d and turned off, so that power is supplied to the switching electric motor 52. Be stopped. Therefore, the coil portion 77 is not excited because the limit switch 72 and the transistor 79 are both not grounded, and the relay switch 7 is not excited.
8 for switching off the electric motor 52 for switching
Will be stopped. At this time, the crank plate 60 that rotates together with the switching plate 71 becomes the second dead center position that is rotated 180 degrees from the first dead center position.

As shown in FIG. 7, the crank plate 60
When the position reaches the second dead center position, the drive link 57 causes the swing link 55 to swing, and the center of the support pin 54 and the moving pin 5 move.
It is a return position in which the center of the connecting pin 56 is located on the side opposite to the toggle position with respect to the straight line C that connects the center of the connection pin 9. Therefore, the swing of the swing link 55 causes the clutch gear 4 to move.
2 is rocked together with the rocking member 43 to a power cut-off position where the meshing with the idle gear 41 is released,
Power transmission between the drive pinion gear 40 and the idle gear 41 is cut off. Further, since the clutch gear 42 is disengaged from the idle gear 41 at the power cut-off position, the rotation of the drive pinion gear 40 driven by the drive electric motor 30 does not occur.
The rotation of the idle gear 41 that is not transmitted to the drive pinion gear 40, that is, is not transmitted to the drive pinion gear 40, that is, the rotation of the idle gear 41 that is rotationally driven via the rack bar 21 when the back door 2 is manually opened and closed. .
Therefore, even when the actuator unit 10 that automatically opens and closes the back door 2 is provided, by opening and closing the back door 2 by manually setting the clutch gear 42 to the power cut-off position when opening and closing the back door 2. The feeling of operation can be improved to the level of an ordinary back door that does not have an automatic opening / closing device.

Next, when the sensor (not shown) recognizes that the back door 2 is automatically opened and closed, the base signal S is input again to the base 79c of the transistor 79 and the switching electric motor 52 is rotated. Will start. Then, the swing link 5 is driven by the drive link 57.
When 5 is rocked to the position shown in FIG.
2 becomes the power transmission position again. Hereinafter, by repeating the same procedure, the rotation of the switching electric motor 52 causes the drive link 57 to reciprocate to switch the clutch gear 42 between the power transmission position and the power cut-off position.

As described above, in the power intermittent mechanism 31 of the present invention, the crank plate 60 and the crank plate 60 are
A drive link 57 connected to the crank pin 61 and a switching electric motor 52 for rotationally driving the crank plate 60 are provided, and the clutch link 42 is cut off from the power transmission position by reciprocating the drive link 57 in the longitudinal direction. Since it is moved to and from the position, the structure is simplified, the power interruption mechanism can be reduced in size and weight, and the cost thereof can be reduced.

Further, in the power interruption mechanism 31 of the present invention, when the clutch gear 42 is in the power transmission position and the power interruption position, the power supply to the switching electric motor 52 is stopped. Power consumption can be reduced.

It is needless to say that the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the power interrupting mechanism 31 of the present invention is provided in the power unit 13 of the actuator unit 10 that automatically opens and closes the back door 2 that is openably and closably mounted on the vehicle 1. The invention is not limited to this, and may be applied to any one as long as it has a drive gear that is rotationally driven by a drive source such as an electric motor or an internal combustion engine, and a driven gear that transmits the rotation of the drive gear.

Further, in the present embodiment, the clutch gear 42 is supported by the rocking member 43 so as to be rockable.
The moving pin 59 is provided on the swing member 43,
Not limited to this, the clutch gear 42 may be attached to the base plate 32.
The swinging member 43 may not be used, for example, by supporting the movable pin 59 and the intermediate shaft 44 of the clutch gear 42 so as to be swingably supported in a groove formed in the above.

Further, in the present embodiment, the drive link 57 supports the clutch gear 42 through the connecting link 58 and the swinging member 43, but the invention is not limited to this, and the drive link 57 reciprocates. The clutch gear 42
Any structure can be used as long as it is moved.

[0053]

According to the present invention, the rotatable rotary member, the drive link connected to the eccentric shaft of the rotary member, and the drive means for rotationally driving the rotary member are provided, and the drive link reciprocates in the longitudinal direction. By doing so, the intermediate gear is moved between the power transmission position and the power cut-off position, so that the structure is simplified, the power connection / disconnection mechanism can be reduced in size and weight, and the cost thereof can be reduced.

Further, according to the present invention, when the intermediate gear is in the power transmission position, the drive means stops and does not consume power, so that power consumption of this power transmission mechanism can be reduced.

Further, according to the present invention, when the intermediate gear is at the power transmission position, the drive link is positioned on a straight line passing through the center of the rotating member and the center of the eccentric shaft, and the drive link is moved to the intermediate gear. Since the engagement is prevented from moving in the disengagement direction, the engagement of the intermediate gear can be stabilized.

[Brief description of drawings]

FIG. 1 is a side view showing a part of a vehicle having an actuator unit including a power connecting / disconnecting mechanism according to an embodiment of the present invention and showing a back door in a fully closed state.

FIG. 2 is a side view showing a part of the vehicle shown in FIG. 1 when a back door is in a fully opened state.

FIG. 3 is a perspective view showing details of an actuator unit shown in FIG.

FIG. 4 is an explanatory diagram showing an outline of a control device for the electric motor shown in FIG.

5 is a circuit diagram of the control device shown in FIG.

6 is a front view showing details of the power unit shown in FIG. 3 when an intermediate gear is in a power transmission position.

FIG. 7 is a front view showing details of the power unit shown in FIG. 6 when the intermediate gear is in the power cutoff position.

[Explanation of symbols]

1 vehicle 2 back door 3 vehicle roof 4 hinges 5 ball studs 6 gas damper 10 Actuator unit 11 Connecting rod 12 Slide mechanism 13 Power unit 14 pillars 15,16 ball socket 20 channels 21 Rack Bar 22 slots 23 Window 24 rack gear 25 ball studs 30 Electric motor for driving 31 Power interruption mechanism 32 base plate 33 Worm gear mechanism 34 Output shaft 40 drive pinion gear 41 idle gear 42 clutch gear 42a large diameter gear 42b small diameter gear 43 Swing member 44 Intermediate shaft 50 switching mechanism 51 Link 52 Electric motor for switching 52a, 52b Power supply terminal 53 fixed block 54 Support pin 55 swing link 56 connecting pin 57 Drive Link 58 Link 59 Moving Pin 60 crank plate 61 crank pin 62 Worm gear mechanism 63 Output shaft 70 Control device 71 switching plate 71a, 71b Cylindrical surface 71c, 71d recess 72 Limit switch 73 Switching mechanism section 74 Controller main body 75 battery 76 Changeover switch 76a Base terminal 76b switch plate 76c switching terminal 76d switching terminal 77 coil 78 relay switch 79 transistors 79a collector 79b Emitter 79c base S base signal T rotation center axis A, B, C straight line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Hoshino             Gunma prefecture Kiryu city Hirosawa town             Mitsuba Co., Ltd. (72) Inventor Shioiri Politics             Gunma prefecture Kiryu city Hirosawa town             Mitsuba Co., Ltd. (72) Inventor Takao Ochiai             Gunma prefecture Kiryu city Hirosawa town             Mitsuba Co., Ltd. F-term (reference) 3J009 DA17 DA18 EA04 EA05 EA11                       EA21 EA32 ED05 FA04

Claims (7)

[Claims] 1. A support base is rotatably provided on each of the support bases,
A movable intermediate between a drive gear that is rotationally driven by a drive source, a driven gear that drives a driven member, and a power transmission position that meshes with both the drive gear and the driven gear and a power cut-off position that meshes with one of them. A power disconnecting mechanism having a gear, wherein the rotating member is rotatably provided with respect to the support base, and is rotatably supported on the intermediate gear and is coupled to an eccentric shaft provided on the rotating member, A drive link that reciprocates in the longitudinal direction by the rotary motion of the rotary member; and a drive unit that rotationally drives the rotary member and switches the intermediate gear between the power transmission position and the power cutoff position. Power interruption mechanism. 2. The power connection / disconnection mechanism according to claim 1,
The power connection / disconnection mechanism, wherein the drive link is located on a straight line connecting a center of the rotating member and a center of the eccentric shaft when the intermediate gear is in a power transmission position. 3. The power connection / disconnection mechanism according to claim 1, wherein the rotating member is rotationally driven every 180 degrees by the drive means. 4. The power interrupting mechanism according to claim 3,
The driving means slides on the outer peripheral surface of the switch member to bring the switch member into an ON state, and a pair of cylindrical surfaces which are in mutual contact with each other.
A switching electric motor that is arranged with a phase difference of 80 degrees, is formed with a pair of recesses for turning off the switch member, and is controlled by control means having a switching plate that rotates integrally with the rotating member. Power interruption mechanism characterized by the fact that there is. 5. The power disconnecting mechanism according to claim 1, wherein the power connecting / disconnecting mechanism is swingably attached to the support base by a support shaft, and is connected to the drive link by a connecting shaft. A swing link, a swing member swingably mounted on the support base, and rotatably supporting the intermediate gear, connected to the connecting shaft and a moving shaft of the swing member. And a connecting link, wherein the drive link supports the intermediate gear swingably through the swing member. 6. The power interrupting mechanism according to claim 5,
The swing member is swingably provided about a rotation shaft of the drive gear, and the intermediate gear swings about the rotation shaft of the drive gear in a state of being meshed with the drive gear. Power intermittent mechanism. 7. The power connecting / disconnecting mechanism according to claim 1, wherein the rack gear is formed on a reciprocating member provided reciprocally in the vehicle. A power connection / disconnection mechanism characterized in that a driven gear is meshed with the reciprocating member to reciprocate to automatically open and close an opening / closing member mounted on the vehicle.