JP2003240063A - Power intermittent continuation mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize meshing of an intermediate gear to a driving gear or a driven gear at a power transmission position. <P>SOLUTION: A clutch gear 42 is installed between a driving pinion gear 40 rotated by a driving electric motor 30 and an idle gear 41 meshed with a rack gear 24. The clutch gear 42 is freely swingable between the power transmission position for engaging with the driving pinion gear 40 and the idle gear 41, and the power breaking position for disengaging from the idle gear 41. The clutch gear 42 has a driving link 57, a swing link 55, and a connection link 58, and is connected with a link part 51 actuated by a switching electric motor 52. When the clutch gear 42 is in the power transmission position, the driving link 58 is in a toggle position. <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, and these clutch plates are brought into a close contact state and a separated state by an electromagnetic attraction force. The power transmission from the electric motor to the driven member can be interrupted by moving the electric power to the driven member.

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.

However, in such an actuator unit, since an electric motor having a large output is used to reliably drive a large and heavy back door, the electromagnetic clutch becomes large and heavy with a large power transmission capacity. The cost was also high.

Therefore, an intermediate gear is rotatably provided on the support base between a drive gear rotationally driven by an electric motor and an output pinion gear driving the rack bar, and the intermediate gear is engaged with both the drive gear and the output pinion gear. There has been used a device in which the power is interrupted by moving the power between a matching power transmission position and a power cut-off position in which only a drive gear is engaged.

In this case, the intermediate gear is rotatably mounted on a swing plate which is swingably provided around a rotation axis of the drive gear, and is in a state of meshing with the drive gear integrally with the swing plate. It is designed to rock. In addition, this swing plate is provided with a lever portion,
A slit is formed in this lever portion. On the other hand, in order to drive the swing plate to swing the intermediate gear between the power transmission position and the power cut-off position, the power connection / disconnection mechanism is provided with a switching mechanism. This switching mechanism has an output member that is swingably provided on a support and is swung by an electric motor for switching. The connecting pin that swings integrally with this output member is a lever of a swing plate. It is engaged with a slit provided in the section. The swing motion of the output member swings the lever portion via the connecting pin, so that the intermediate gear is swung between the power transmission position and the power cutoff position.

[0007]

In such a power connecting / disconnecting device, a reaction force acting in the direction of disengagement with the output pinion gear is generated in the intermediate gear at the power transmission position by the power input from the drive gear. become. Further, this reaction force becomes large in accordance with the output of the drive motor, and becomes particularly large when a drive motor having a large output is used to drive a large and heavy back door such as an actuator unit. Then, this reaction force tends to move the swing plate and the output member in the direction in which the meshing of the intermediate gear is disengaged. In response to this reaction force, the switching mechanism has a structure in which a lever member and an output member that swing together are connected by a slit and a connecting pin, so it is difficult to hold the mesh firmly against this reaction force. , The meshing between the intermediate gear and the output pinion gear was unstable.

An object of the present invention is to stabilize the meshing of the intermediate gear at the power transmission position with the drive gear or the driven gear.

[0009]

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 connection / disconnection mechanism having an intermediate gear that is movable between a power transmission position that meshes with both the gear and the driven gear and a power cut-off position that meshes with one of the gears,
A swing link that is swingably attached to the support base by a support shaft and has a connecting shaft at the other end, a swing member that rotatably supports the intermediate gear, and the swing link that is connected to the connecting shaft. A connecting position connected to the moving shaft of the moving member, a toggle position beyond a straight line connecting the center of the supporting shaft and the center of the moving shaft, and an opposite side of the toggle position with respect to the straight line. The connecting shaft portion is moved so that the center of the connecting shaft moves between the returning position and the intermediate gear via the swing link and the connecting link to the power transmission position and the power cut-off position. It is characterized by being movable between.

In the power connection / disconnection mechanism of the present invention, the swing member is swingably mounted on the support base, and the intermediate gear and the moving shaft are rotatably provided on the swing member. The connection link rotatably supports the intermediate gear via the connection link.

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.

According to another aspect of the present invention, there is provided a power connection / disconnection mechanism having a rotating member rotatably provided on the support base, the drive link being connected to an eccentric shaft of the rotating member, and the intermediate gear being at the power transmission position or When the power cutoff position is reached, the rotary member is rotationally driven every 180 degrees so that the eccentric shaft is located on a straight line connecting the connecting shaft and the rotation center axis of the rotary member. It is characterized by

The power connection / disconnection mechanism of the present invention is arranged with a phase difference of 180 degrees with respect to a pair of cylindrical surfaces that rotate integrally with the rotating member and come into sliding contact with the switch member to turn on the switch member. The switching electric motor is controlled by a control means having a switching plate having a pair of recesses for turning off the switch member on an outer peripheral surface thereof.

In the power on-off mechanism of the present invention, the first gear portion meshing with the drive gear and the second gear portion coaxially and integrally rotating with the first gear portion and meshing with the driven gear are provided. It is characterized by having an intermediate gear.

In the power connecting / disconnecting mechanism of the present invention, the driven gear is meshed with the rack gear formed on the reciprocating member provided on the vehicle so as to reciprocate, 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.

In the present invention, since the intermediate gear in the power transmission position cannot move in the direction of the power cutoff position, the meshing between the intermediate gear and the drive gear or the driven gear is firmly held, and the meshing is achieved. Can be stabilized.

[0017]

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 equipped 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. 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. 6 in which the intermediate gear is in the power cut-off position. It is a front view which shows the detail at the time of standing.

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 ball sockets 1 at both ends.
5, 16 are provided, and the ball socket 15 is swingably connected to the back door 2 by being engaged with the ball stud 5 of the back 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 connection / disconnection 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 having a large number of teeth and serves as a large-diameter gear 42a, and a second gear having a smaller number of teeth than the large-diameter gear, coaxially and integrally rotating 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 intermediate gear 42 rotatably supported by the connecting link 58 via the swinging member 43.
Will move as the swing 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. As shown in FIGS. 6 and 7, the crank pin 61 is provided on the crank plate 60 so as to be eccentric from the rotation center axis T thereof.
With the rotation of 0, the rotation center axis T is rotationally moved. And the crank plate 60
Of the crank plate 6 so that the crank pin 61 is positioned on the straight line A connecting the rotation center axis of the crank plate 60 and the connecting pin 56 by the switching electric motor 52.
0 is rotated every 180 degrees. Therefore, the drive link 57 is reciprocated in the longitudinal direction by the switching electric motor 52 to swing the swing link 55 and swing the intermediate gear 42 between the power transmission position and the power cutoff position. When the intermediate gear 42 is in the power transmission position, the crank pin 61 is in the first dead center position on the straight gear A, which is closer to the intermediate gear 42 than the rotation center axis T of the crank plate 60, and is in the power cut-off position. When the rotation center axis T of the crank plate 60 on the straight line A
The second dead center position is located on the opposite side of the intermediate gear 42.

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 limit switch 72 described above, 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.

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 becomes the first dead center position, as described above, the crank pin 61 is located on the line segment 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
It is located at a and is in an off state. In the present embodiment, the toggle position is a position where the center of the connecting pin 56 crosses the straight line B connecting the center of the support pin 54 and the center of the moving pin 59 to the opposite side of the crank plate 60. However, the present invention is not limited to this.
It may be located above. Here, the power transmission position is set and the drive pinion gear 40 to the idle gear 41
The clutch gear 42, which transmits power to the clutch gear 42, generates a reaction force acting in a direction in which the clutch gear 42 disengages from the idle gear 41. However, the power interruption mechanism 31 of the present invention
Then, when the power transmission position is reached, the drive link 57
Is in the toggle position, and at this time, since the crank pin 61 is positioned at the first dead center position of the crank plate 60, the disengagement of the clutch gear 42 is suppressed. That is, the clutch gear 4
In order for the rocking member 43 to rock in the direction in which the meshing between the gear 2 and the idle gear 41 is disengaged, the position of the connecting pin 56 is the toggle position, so the rocking link 55 is moved away from the crank plate 60. It is necessary to move it counterclockwise in the figure. However, at this time, since the crank plate 60 is in the first dead center position, the drive link 5 that connects the connecting pin 56 and the crank pin 61 to each other.
The counterclockwise swinging of the swinging link 55 is restricted by 7, and the clutch gear 42 cannot move in the direction out of mesh with the idle gear 41.

As described above, in the power transmission mechanism 31 of the present invention of the present invention, the clutch gear 42 in the power transmission position cannot move in the direction of disengagement from the idle gear 41. It is possible to firmly hold the mesh with 41 and stabilize the mesh.

Further, in the power connection / disconnection mechanism 31 of the present invention, the clutch gear 42 in the power transmission position is the idle gear 4
Since the switching electric motor 52 does not need to generate the power for maintaining the meshing of the clutch gear 42, it is not possible to move in the direction in which the meshing with 1 is disengaged, so that the economical efficiency of the power disconnecting mechanism is improved. be able to.

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, the drive electric motor 30 is supplied with a current from a drive device (not shown) 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 flow of a current, and the relay switch 78 is turned on to cause a current to flow 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,
The limit switch 72 is brought into sliding contact with the cylindrical surface 71a from 71c and is turned on. The base signal S input to the base 79c is designed to be released after the limit switch 72 is turned on, and after the current flowing through the transistor 79 is stopped, the coil section 77 is limited. By being grounded via the switch 72, the relay switch 78 is maintained in the switch-on state.

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. 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 78 is switched off to stop the switching electric motor 52. At this time, the crank plate 60 rotating integrally with the switching plate 76b is
It is the second dead center position rotated by 180 degrees from the 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 is transmitted through the drive link 57, and the clutch gear 42 swings between the power transmission position and the power cut-off position.

As described above, in the power connection / disconnection mechanism 31 of the present invention, the drive pinion gear 40 and the idle pinion gear 40 are idled between the drive pinion gear 40 rotationally driven by the drive electric motor 30 and the idle gear 41 driving the rack bar 21. Gear 4
1 is provided with a clutch gear 42 that oscillates between a power transmission position that meshes with both 1 and a power cut-off position that meshes only with the drive pinion gear 40. The clutch gear 42 is provided with a link portion 51 driven by a switching electric motor 52. Since the power is interrupted by swinging through the power, the power interrupting mechanism 31 can be reduced in size and weight, and the cost thereof 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 and is 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 connecting pin 56 is reciprocally moved by the switching electric motor 52 via the drive link 57, the crank plate 60 and the crank pin 61, but the present invention is not limited to this. Alternatively, if the connecting pin 56 can be operated at each of the power transmission position and the power cut-off position, it may be operated by another driving means, or may be of a manual switching type.

[0049]

According to the present invention, since the intermediate gear in the power transmission position cannot move in the direction of the power cutoff position, the meshing between the intermediate gear and the drive gear or the driven gear is firmly maintained. The meshing 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 DA01 EA04 EA05 EA11 EA21                       EA32 ED05 FA03

Claims (7)

[Claims] 1. A support base is rotatably provided on each of the support bases,
It is movable between a drive gear that is rotationally driven by a drive source, a driven gear that drives a driven member, 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. And a swing link having a connecting shaft at the other end and a swing link rotatably supporting the intermediate gear. A toggle position including a member and a connecting link that is connected to the connecting shaft and is connected to the moving shaft of the swinging member, and that exceeds a straight line connecting the center of the supporting shaft and the center of the moving shaft; The connecting shaft portion is moved so that the center of the connecting shaft moves between a return position opposite to the toggle position with respect to the straight line, and the connecting shaft portion is moved via the swing link and the connecting link. The intermediate gear is the power A power connection / disconnection mechanism that is movable between a transmission position and the power cut-off position. 2. The power connection / disconnection mechanism according to claim 1,
The swing member is swingably mounted on the support base, and the intermediate gear and the moving shaft are rotatably provided on the swing member,
A power connection / disconnection mechanism characterized in that the connection link rotatably supports the intermediate gear via the swing member. 3. The power connection / disconnection mechanism according to claim 2,
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 while meshing with the drive gear. Power intermittent mechanism. 4. The power connecting / disconnecting mechanism according to claim 1, further comprising a rotating member rotatably provided on the support base, the eccentric shaft of the rotating member including the drive member. For switching so that the eccentric shaft is located on the straight line connecting the connecting shaft and the rotation center shaft of the rotating member when the link is connected and the intermediate gear is in the power transmission position or the power cutoff position. A power interrupting mechanism characterized in that the rotating member is driven to rotate by 180 degrees by an electric motor. 5. The power interrupting mechanism according to claim 4,
A pair of cylindrical surfaces, which rotate together with the rotating member and are in sliding contact with the switch member to turn the switch member on, are arranged with a phase difference of 180 degrees from each other and turn the switch member off. A power connection / disconnection mechanism characterized in that the switching electric motor is controlled by a control means having a switching plate having a recess and an outer peripheral surface. 6. Any one of claims 1, 2, 3, 4, and 5.
In the power intermittent mechanism, the intermediate gear may include a first gear portion meshing with the drive gear, and a second gear portion coaxially and integrally rotating with the first gear portion and meshing with the driven gear. Power interruption mechanism characterized by having. 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.