JP4815275B2 - Clutch, motor with reduction gear using the same, and automatic opening / closing device for vehicle - Google Patents

Description

  The present invention relates to a clutch for intermittently transmitting power between a first rotating member and a second rotating member, a motor with a speed reducer using the clutch, and an automatic opening / closing device for a vehicle.

  In an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body such as a sliding door provided in a vehicle by an electric motor, an electromagnetic clutch is provided in a power transmission path between the electric motor and the opening / closing body. Thus, the power transmission between the electric motor and the opening / closing body is intermittently switched to switch the opening / closing mode between the automatic opening / closing mode and the manual opening / closing mode.

  The electromagnetic clutch used in such an opening / closing device has a clutch rotor that is rotationally driven by an electric motor, and an armature that is attached to an output shaft connected to the opening / closing body and rotates together with the output shaft. Can be switched to the power transmission state by engaging the clutch rotor with the clutch rotor. The clutch rotor and the armature are engaged in a friction type in which they are frictionally engaged and in a mesh type in which they are engaged with each other. In any of these methods, the magnetic attraction force of the clutch coil is used. The armature is attracted to the clutch rotor to engage the clutch rotor and the armature.

  On the other hand, since such an opening / closing device is mounted inside a vehicle body panel, it is required to reduce its size. Therefore, as a drive source for the switchgear, a motor with a speed reducer, in which the electric motor and the speed reducer are unitized, is often used in order to obtain a large driving torque from a small electric motor. In this case, a worm gear mechanism that is small and has a large reduction ratio is often used as a reduction gear, and a worm that is driven to rotate by an electric motor and a worm wheel that rotates together with an output shaft are accommodated in the case of the reduction gear. . Moreover, in an opening / closing device equipped with such a reduction gear, the electromagnetic clutch is usually housed in a reduction gear case together with a worm gear mechanism in order to reduce the size of the device.

For example, in Patent Document 1, an armature of an electromagnetic clutch is attached to a base end of an output shaft of a reduction gear so as to be integrally rotatable, and a worm wheel and a clutch rotor are arranged side by side on an armature so as to be relatively rotatable on an output shaft. An electromagnetic clutch is described in which a clutch coil is disposed between a wheel and a clutch rotor, and the worm wheel and the clutch rotor are connected inside the clutch coil.
Japanese Patent Laid-Open No. 2005-83169

  However, in the structure in which the worm wheel and the clutch rotor are connected inside the clutch coil, in order to suppress the length of the output shaft, the output shaft is supported by the clutch coil, that is, the housing via the clutch rotor. Since it is necessary, the bearings are provided in two stages in the radial direction between the output shaft and the clutch rotor and between the clutch rotor and the clutch coil. As a result, the radial dimension of the electromagnetic clutch is increased, and the support structure for the output shaft and the clutch rotor is complicated, which increases the size of the clutch and the automatic opening / closing device. Further, as a bearing arranged outside the clutch rotor, it is necessary to use a large-diameter ball bearing, and there is a problem that the cost becomes high.

  An object of the present invention is to simplify the structure of a clutch and to reduce the size of the clutch, a motor with a speed reducer and a vehicle automatic opening / closing device in which the clutch is used.

  The clutch of the present invention is a clutch for intermittently transmitting power between a first rotating member and a second rotating member, and is connected to the first rotating member so as to be able to transmit power, and the second A rotating body that is mounted so as to be relatively rotatable with the rotating member, a first clutch plate that is provided with a first engaging portion on an axial end face, and is rotatably mounted with respect to the second rotating member; A coupling member disposed coaxially with the second rotating member, coupled to the rotating body on one side in the axial direction and coupled to the outer peripheral edge of the first clutch plate on the other side; A second engaging portion opposed to the engaging portion, coupled to the second rotating member so as to be capable of transmitting power, and the second engaging portion engaged with the first engaging portion; A second movable in the axial direction between the engagement position and the release position where the engagement is released And having a latch plate.

  The clutch of the present invention is characterized in that the connecting member is connected to the rotating body and the first clutch plate so as to be movable in the axial direction.

  In the clutch according to the aspect of the invention, the connecting member is formed in a cylindrical shape that connects the outer peripheral edge of the rotating body and the outer peripheral edge of the first clutch plate, and the rotating member and the first clutch plate are connected to each other. The second clutch plate is disposed between the connecting members and between the connecting members.

  The clutch of the present invention is disposed opposite to the second clutch plate with the first clutch plate interposed therebetween, and has a magnetic attraction force that moves the second clutch plate from the release position to the engagement position. It has the clutch coil which generate | occur | produces.

  The motor with a speed reducer of the present invention is a motor with a speed reducer provided with a motor body having a rotating shaft and a speed reducing mechanism that decelerates the rotation of the rotating shaft and outputs it from an output shaft, and is integrated with the rotating shaft. A worm wheel that is rotatably attached to the output shaft, meshes with the worm and forms the speed reduction mechanism with the worm, and includes a first engagement portion on an axial end surface, A first clutch plate mounted on the output shaft so as to be relatively rotatable; and a first clutch plate disposed coaxially with the output shaft and connected to the worm wheel on one axial side and the first clutch plate on the other side And a second engaging portion that faces the first engaging portion, and is connected to the output shaft so as to be capable of transmitting power, and the second engaging portion. Is the first A second clutch plate that is movable in the axial direction between an engagement position that engages with the engagement portion and a release position that releases the engagement, and is between the rotation shaft and the output shaft. The power transmission can be intermittent.

  The motor with a speed reducer according to the present invention includes a resin case that houses the speed reduction mechanism, the first clutch plate, and the second clutch plate.

  An automatic opening and closing device for a vehicle according to the present invention is an automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body provided in a vehicle, and is connected to a rotating shaft that is driven to rotate by a motor body, the opening and closing body, An output shaft that rotates in conjunction with the opening and closing operation of the opening and closing body, a rotating body that is connected to the rotating shaft and is rotatably mounted on the output shaft, and rotates together with the rotating shaft, and a first end on the axial end surface A first clutch plate that is mounted on the output shaft so as to be relatively rotatable, and is arranged coaxially with the output shaft, and is connected to the rotating body on one side in the axial direction and on the other side A connecting member connected to the outer peripheral edge of the first clutch plate and a second engaging portion facing the first engaging portion, and connected to the output shaft so that power can be transmitted. The second engaging portion is the first engaging portion. And a second clutch plate that is movable in the axial direction between an engagement position that engages with the portion and a release position that releases the engagement, and a power between the rotating shaft and the output shaft. It is characterized in that transmission can be interrupted.

  The automatic opening and closing device for a vehicle according to the present invention includes a drum fixed to the output shaft, and a rope body that is stretched over the drum and connected to the opening and closing body, and is pulled by the rope body. The opening / closing body is opened and closed.

  According to the present invention, since the rotating body is connected to the outer peripheral edge of the first clutch plate by the connecting member, the second clutch plate is mounted between the rotating body and the first clutch plate, Alternatively, a bearing for supporting the second rotating member on the housing or the like can be arranged. Therefore, it is possible to reduce the size of the clutch, the motor with a reduction gear and the automatic opening / closing device for the vehicle in which the clutch is used, without requiring a complicated bearing structure.

  According to the present invention, since the connecting member is connected to the rotating body and the first clutch plate so as to be movable in the axial direction, an axial load is applied from the rotating body to the first clutch plate. Can be prevented. As a result, when an excessive load is applied between the rotary plate and the first clutch plate, the axial component of the load is applied to the first clutch plate, and the first clutch plate is distorted. This can be prevented and the operation accuracy of the clutch can be increased.

  Further, according to the present invention, the connecting member is formed in a cylindrical shape that connects the outer peripheral edge of the rotating body and the outer peripheral edge of the first clutch plate, and is formed between the rotating body and the first clutch plate. Since the second clutch plate is arranged inside the connecting member, the second clutch plate can be supported at the intermediate portion of the second rotating member, and thus the second clutch plate can be securely attached. Can be supported.

  Furthermore, according to the present invention, since the clutch coil disposed to face the second clutch plate with the first clutch plate interposed therebetween is provided, the structure can be simplified even if the clutch is an electromagnetic clutch. Thus, it is possible to reduce the size of the clutch, the motor with a reduction gear, and the vehicle automatic opening / closing device in which the clutch is used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view showing a one-box type vehicle, and FIG. 2 is a top view showing a vehicle automatic opening / closing device according to an embodiment of the present invention.

  A vehicle 11 shown in FIG. 1 is a one-box type passenger car, and a side door of a vehicle body 12 is provided with a slide door 13 that is an opening / closing body. The sliding door 13 moves along a guide rail 14 fixed to the side of the vehicle body 12 and can be opened and closed between a fully closed position indicated by a solid line and a fully open position indicated by a one-dot chain line in FIG. It is used by opening it to a desired opening when passengers get on and off and load and unload luggage.

  As shown in FIG. 2, the slide door 13 is provided with a roller assembly 15, and the roller assembly 15 is guided by the guide rail 14 so that the slide door 13 is movable in the front-rear direction of the vehicle 11. . Further, a curved portion 14a that curves toward the vehicle interior side is provided on the vehicle front side of the guide rail 14, and the roller assembly 15 is guided by the curved portion 14a, so that the slide door 13 is flush with the side surface of the vehicle body 12. It is closed in a state of being drawn inside the vehicle body 12 so as to fit. Although not shown, the roller assembly 15 is also provided in the upper and lower portions (upper portion and lower portion) of the front end portion of the slide door 13 in addition to the portion (center portion) shown in the drawing, and the opening portion of the vehicle body 12 corresponding to them. Guide rails (not shown) corresponding to the upper part and the lower part are also provided at the upper and lower parts, and the slide door 13 is supported by the vehicle body 12 at a total of three locations.

  As shown in FIG. 2, the vehicle 11 is provided with a vehicle automatic opening / closing device 21 (hereinafter referred to as an opening / closing device 21) in order to automatically open and close the slide door 13. The opening / closing device 21 has a drive unit 22 that is fixed to the inside of the vehicle body 12 adjacent to a substantially central portion of the guide rail 14 in the vehicle front-rear direction, and a cord that is pulled out from the drive unit 22 to the vehicle front side. A closed cable 23a as a body is connected to the roller assembly 15 from the vehicle front side (closed side) via a reversing pulley 24a provided at the front end of the guide rail 14, and is pulled out from the drive unit 22 to the vehicle rear side. An open side cable 23b as a strip is connected to the roller assembly 15 from the vehicle rear side (open side) via a reversing pulley 24b provided at the rear end of the guide rail 14. The drive unit 22 pulls either the closed side cable 23a or the open side cable 23b to pull the slide unit 13 automatically by opening and closing the cable 23a, 23b.

  3 is a front view showing details of the drive unit shown in FIG. 2, and FIG. 4 is a sectional view taken along the output shaft of the drive unit shown in FIG.

  As shown in FIGS. 3 and 4, the drive unit 22 has a motor 25 with a speed reducer according to an embodiment of the present invention. The motor 25 with a speed reducer includes an electric motor 26 and an electric motor 26 as a motor body. The rotation of the electric motor 26 is decelerated to a predetermined number of rotations by the speed reducer 27 and is output from the output shaft 28 as the second rotating member. ing. As the electric motor 26, a so-called brushed DC motor that can be rotated forward and backward by an armature shaft (rotating shaft) 26a as a first rotating member constituting the armature is used. Accordingly, the operation is controlled by the control device 29.

  On the other hand, as shown in FIG. 4, the speed reducer 27 has a resin case body 31a formed in a bathtub shape and a metal cover 31b that closes the case body 31a. The worm gear mechanism 32 is accommodated. In the illustrated case, the worm 32a constituting the worm gear mechanism 32 is integrally provided on the outer peripheral surface of the armature shaft 26a of the electric motor 26 protruding into the case 31, and the armature shaft 26a of the electric motor 26 is rotationally driven. Then, the worm 32a rotates with the armature shaft 26a. The output shaft 28 is rotatably supported by the case 31 by ball bearings 33a and 33b. A resin worm wheel 32b as a rotating body is mounted on the intermediate portion of the output shaft 28 so as to be relatively rotatable. Yes. The worm wheel 32b is meshed with the worm 32a and constitutes the worm gear mechanism 32 by the worm 32a. With this, when the electric motor 26 is operated, the rotation of the armature shaft 26a is brought to a predetermined number of rotations by the worm gear mechanism 32. The output is decelerated until it is output from the output shaft 28.

  An electromagnetic clutch 34 as a clutch according to an embodiment of the present invention is accommodated inside the case 31 adjacent to the worm gear mechanism 32, and the rotation of the worm wheel 32 b is output via the electromagnetic clutch 34. It is transmitted to the shaft 28. That is, in the drive unit 22, power transmission between the armature shaft 26 a and the output shaft 28 can be interrupted by the electromagnetic clutch 34. Details of the electromagnetic clutch 34 will be described later.

  A unit case 35 is formed integrally with the case 31 of the motor 25 with a speed reducer, and a drum 36 is accommodated inside the unit case 35. The drum 36 is fixed to the tip of the output shaft 28 by a nut 37 and is rotated together with the output shaft 28. A closed guide cable 23a and an open cable are provided in a spiral guide groove 36a formed on the outer peripheral surface of the drum 36. 23b is wound (wrapped) a plurality of times in the same direction. The ends of the cables 23 a and 23 b are fixed to the drum 36. When the drum 36 is driven by the electric motor 26 to rotate forward or reverse, either the closed cable 23 a or the open cable 23 b is connected to the drum 36. One of the other is rewound from the drum 36 while being wound. That is, the output shaft 28 is connected to the slide door 13 via the drum 36 and the cables 23a and 23b. When the slide door 13 opens and closes, the output shaft 28 rotates in conjunction with the opening and closing operation.

  As shown in FIG. 3, the drive unit 22 is provided with two tensioner mechanisms 41a and 41b in order to apply a predetermined tension to the cables 23a and 23b. These tensioner mechanisms 41 a and 41 b have a pair of fixed pulleys 42 a and 42 b parallel to the drum 36, and a pair of movable pulleys 43 a and 43 b provided between the fixed pulleys 42 a and 42 b and the drum 36. The unit case 35 is provided with a single support shaft 44 in parallel with the output shaft 28. The fixed pulleys 42a and 42b are stacked on the support shaft 44 in the axial direction and are mounted so as to be rotatable relative to each other. The closed cable 23a is stretched from the drum 36 to one fixed pulley 42a from the rear side of the vehicle, and is drawn out of the unit case 35 from the drawer portion 45a on the front side of the vehicle and guided to the reversing pulley 24a. The cable 23b is stretched from the drum 36 to the other fixed pulley 42b from the front side of the vehicle, and is drawn out of the unit case 35 from the drawer portion 45b on the rear side of the vehicle and guided to the reversing pulley 24b. Outer tubes 46a and 46b are respectively attached to the lead portions 45a and 45b, and the cables 23a and 23b are inserted into the outer tubes 46a and 46b between the drive unit 22 and the reversing pulleys 24a and 24b. Yes.

  On the other hand, the movable pulleys 43a and 43b are located on both sides of the fixed pulleys 42a and 42b and are disposed in the unit case 35. The closed cable 23a is located between the fixed pulley 42a and the drum 36 with respect to the fixed pulley 42a. The open side cable 23b is hung on the movable pulley 43b on the vehicle rear side with respect to the fixed pulley 42b between the fixed pulley 42b and the drum 36. The movable pulleys 43a and 43b are rotatably supported by the movable shafts 47a and 47b, respectively, and the movable shafts 47a and 47b are moved toward and away from the drum 36 along slits 48a and 48b provided in the unit case 35, respectively. The movable shafts 47 a and 47 b are urged away from the drum 36 by torsion springs 49 a and 49 b attached to the unit case 35. Thereby, each cable 23a, 23b is urged | biased by the direction in which the cable length becomes long by movable pulley 43a, 34b, and, thereby, predetermined tension | tensile_strength is provided. Therefore, even when the moving path length of each cable 23a, 23b changes, such as when the roller assembly 15 is guided by the curved portion 14a of the guide rail 14, the tensioner mechanisms 41a, 41b absorb the looseness of each cable 23a, 23b. Thus, the slide door 13 can be reliably operated.

  Next, the electromagnetic clutch 34 will be described.

  The electromagnetic clutch 34 is adapted to intermittently transmit power between the armature shaft 26a that is rotationally driven by the electric motor 26 and the output shaft 28 that is connected to the slide door 13, whereby the opening / closing device 21 is electrically operated. The automatic opening / closing mode in which the slide door 13 is automatically opened / closed by the motor 26 and the manual opening / closing mode in which the sliding door 13 is opened / closed manually are switched. In the present embodiment, the electromagnetic clutch 34 is a so-called friction type, and the clutch rotor 52 as the first clutch plate and the second clutch plate housed in the case 31 of the motor 25 with speed reducer. The armature 53 is provided.

  The clutch rotor 52 is formed of a steel material in an annular shape with a substantially U-shaped cross section, and an axial end surface facing the worm wheel 32b is a friction surface 52a as a first engaging portion. Further, a boss portion 52b is provided on the inner peripheral side of the clutch rotor 52, and the clutch rotor 52 is mounted on the output shaft 28 via the sliding bearing 54 at the boss portion 52b so as to be relatively rotatable.

  The armature 53 is formed in an annular shape having substantially the same diameter as the clutch rotor 52, and one end surface in the axial direction is a friction surface 53 a as a second engaging portion, and the friction surface 53 a is a friction surface of the clutch rotor 52. The armature 53 is arranged between the worm wheel 32b and the clutch rotor 52 in the axial direction with respect to the clutch rotor 52 so as to face the surface 52a with a slight gap. A connecting member 55 formed in an annular shape is disposed inside a through hole 53b formed in the axial center of the armature 53, and this connecting member 55 is connected to a serration portion 28a formed in an intermediate portion of the output shaft 28. The armature 53 and the connection member 55 are coupled by a leaf spring 56, and the leaf spring 56, the armature 53, and the connection member 55 are each secured by a rivet or the like. The leaf spring 56 is formed in a disc shape obtained by punching a steel plate or the like into a predetermined shape, and is elastically deformable in the axial direction and has a predetermined rigidity in the circumferential direction. Thus, the armature 53 is connected to the output shaft 28 so that power can be transmitted by the leaf spring 56, that is, to rotate together with the output shaft 28, and the friction surface 53a is engaged with the friction surface 52a of the clutch rotor 52 ( It is freely movable in the axial direction between an engagement position where the contact is made and a release position where the engagement is released. That is, the leaf spring 56 is in a natural state where it is not elastically deformed when the armature 53 is in the release position, and is configured to be elastically deformed in the axial direction when the armature 53 is moved to the engaging position. As a result, the armature 53 in the engagement position is urged toward the release position by the spring force of the leaf spring 56, and is held in the release position by the leaf spring 56 when moved to the release position. On the other hand, since the leaf spring 56 has a predetermined rigidity in the circumferential direction, the rotational power between the armature 53 and the output shaft 28 can be transmitted. That is, when the armature 53 rotates, the rotation is transmitted to the output shaft 28 via the leaf spring 56, and when the output shaft 28 rotates, the rotation is transmitted to the armature 53 via the leaf spring 56.

  FIG. 5 is an exploded perspective view showing a connection structure between the worm wheel of the rotor ring and the clutch rotor.

  The electromagnetic clutch 34 is provided with a rotor ring 61 as a connecting member in order to connect the worm wheel 32b and the clutch rotor 52. The rotor ring 61 is formed in a cylindrical shape with a resin material having a predetermined rigidity, and a plurality of engaging protrusions 61a arranged in the circumferential direction are provided at one end in the axial direction, and at the other end in the axial direction. A serration portion 61b is formed on the inner peripheral surface. On the other hand, a disk-shaped flange portion 62 is formed in the worm wheel 32b, and a plurality of engagement holes 62a penetrating the flange portion 62 in the axial direction are formed side by side in the circumferential direction on the outer peripheral edge portion of the flange portion 62. The rotor ring 61 is inserted into the engaging hole 62a of the corresponding worm wheel 32b so that each engaging projection 61a is coaxial with the output shaft 28 at one end thereof, and the outer peripheral edge of the worm wheel 32b. To be connected to. A serration portion 52 c is formed on the outer peripheral edge of the clutch rotor 52 on the worm wheel 32 b side, and the rotor ring 61 is engaged with the serration portion 52 c of the clutch rotor 52 by engaging the serration portion 61 b with the other end. On the side, it is coaxial with the output shaft 28 and is connected to the outer peripheral edge of the clutch rotor 52. Thus, the worm wheel 32 b and the clutch rotor 52 are coupled via the rotor ring 61, and power transmission between the worm wheel 32 b and the clutch rotor 52 is performed via the rotor ring 61. Further, the rotor ring 61 is connected to the outer peripheral edge of the worm wheel 32b and the clutch rotor 52, so that the armature 53 is accommodated inside the rotor ring 61, whereby the worm wheel 32b and the clutch The rotor 52 is connected to the outer periphery of the armature 53 by a rotor ring 61, and the power between the worm wheel 32 b and the clutch rotor 52 is transmitted from the outer periphery of the armature 53 by the rotor ring 61. . Therefore, even if the armature 53 is arranged between the worm wheel 32b and the clutch rotor 52 and this armature 53 is fixed to the output shaft 28, the output shaft 28, The support structure for the worm wheel 32b, the clutch rotor 52, and the armature 53 can be simplified, and the size of the electromagnetic clutch 34, the motor 25 with a speed reducer in which the electromagnetic clutch 34 is used, and the opening / closing device 21 can be reduced.

  Thus, in this electromagnetic clutch 34, the worm wheel 32b and the clutch rotor 52 are connected by the cylindrical rotor ring 61, and the power transmission path is provided on the outer peripheral side of the worm wheel 32b and the clutch rotor 52. The support structure of the output shaft 28, the worm wheel 32b, the clutch rotor 52, and the armature 53 can be simplified, and the size of the electromagnetic clutch 34 and the motor 25 with a reduction gear and the opening / closing device 21 in which the electromagnetic clutch 34 is used can be reduced. .

  In the electromagnetic clutch 34, the armature 53 is arranged between the worm wheel 32b and the clutch rotor 52 and inside the rotor ring 61. Therefore, the output shaft 28 has a pair of ball bearings for supporting the armature 53. The armature 53 can be supported between 33a and 33b, and thereby the armature 53 can be reliably supported.

  Further, in this electromagnetic clutch 34, the rotor ring 61 is connected to the worm wheel 32b so as to be movable in the axial direction by inserting the engaging projection 61a into the engaging hole 62a of the worm wheel 32b from the axial direction. The rotor ring 61 is connected to the worm wheel 32b and the clutch rotor 52 so as to be movable in the axial direction when the serration portion 61b is engaged with the serration portion 52c of the clutch rotor 52 in the axial direction. Has been. The worm wheel 32b is arranged so as to be rotatable relative to the output shaft 28, and since the worm wheel 32b is made of resin, the worm wheel 32b is slightly moved in the axial direction with respect to the output shaft 28. In this embodiment, the rotor ring 61 is connected to be freely movable in the axial direction between the worm wheel 32b and the clutch rotor 52, even if the worm wheel 32b is bent. Therefore, the connection state between the two is not removed, the stress in the axial direction is absorbed by the rotor ring 61, and the stress is not transmitted from the worm wheel 32b to the clutch rotor 52.

  In this way, in this electromagnetic clutch 34, the rotor ring 61 is connected to the worm wheel 32b and the clutch rotor 52 so as to be movable in the axial direction, so that an axial load is applied from the worm wheel 32b to the clutch rotor 52. This can be prevented. As a result, it is possible to prevent the clutch rotor 52 from being distorted by transmitting axial stress from the worm wheel 32b to the clutch rotor 52 via the rotor ring 61, and to improve the operation accuracy of the electromagnetic clutch 34. Can do.

  As shown in FIG. 4, a clutch coil 71 is accommodated inside the case 31 so as to face the armature 53 across the back side of the clutch rotor 52, i.e., the clutch rotor 52. The clutch coil 71 is wound around a clutch yoke 72 formed in an annular shape having a U-shaped cross section, and faces the armature 53 over the entire circumference of the armature 53. The clutch coil 71 is connected to the control device 29 via a wiring (not shown). When electric power is supplied from the control device 29, a magnetic attractive force is generated to attract the armature 53 in a direction approaching the clutch rotor 52. It is like that. Accordingly, when the clutch coil 71 is energized when the armature 53 is in the release position, the armature 53 moves from the release position to the engagement position, and the friction surfaces 52a and 53a of the clutch rotor 52 and the armature 53 are pressed against each other. Thus, the electromagnetic clutch 34 is switched to the power transmission state, and power is transmitted between the electric motor 26 and the output shaft 28. On the other hand, when the energization to the clutch coil 71 is stopped, the armature 53 is urged in the direction away from the clutch rotor 52 by the spring force of the leaf spring 56 and is held at the release position away from the clutch rotor 52. As a result, the engagement between the clutch rotor 52 and the armature 53 is released, the electromagnetic clutch 34 enters a power cut-off state, and power transmission between the electric motor 26 and the output shaft 28 is cut off.

  As described above, in the electromagnetic clutch 34, the clutch coil 71 is provided so as to face the armature 53 with the clutch rotor 52 interposed therebetween. Therefore, the structure of the electromagnetic clutch 34 is simplified, and the electromagnetic clutch 34 and the electromagnetic clutch 34 are arranged. The motor 25 with a reduction gear and the switching device 21 in which the electromagnetic clutch 34 is used can be reduced in size.

  Next, the operation of the opening / closing device 21 will be described.

  For example, when a command signal for operating the sliding door 13 in the closing direction is input to the control device 29 by operating a closing side of an opening / closing switch (not shown), the clutch coil 71 is energized and the electromagnetic clutch 34 is switched to a power transmission state. Then, the electric motor 26 operates in the forward direction. As a result, the drum 36 rotates counterclockwise in FIG. 3, the closed cable 23a is wound around the drum 36, and the slide door 13 is pulled by the closed cable 23a and moves toward the fully closed position. On the other hand, when the opening side of the open / close switch is operated and a command signal for operating the slide door 13 in the opening direction is input to the control device 29, the electric motor 26 reverses and the drum 36 rotates in the clockwise direction in FIG. Then, the open side cable 23b is wound around the drum 36, and the slide door 13 is pulled by the open side cable 23b and moves toward the fully open position. When the sliding door 13 reaches the fully open position or the fully closed position, or when the opening / closing switch is stopped, the electric motor 26 is stopped, and then the electromagnetic clutch 34 is switched to the disconnected state, and the automatic opening / closing operation is completed.

  On the other hand, when the electromagnetic clutch 34 is switched to the power cut-off state with the electric motor 26 stopped, the opening / closing device 21 enters the manual opening / closing mode, and the manual opening / closing operation force of the slide door 13 can be reduced.

  FIG. 6 is an enlarged cross-sectional view showing a modified example of the connection structure between the worm wheel and the rotor ring.

  In the electromagnetic clutch 34 shown in FIG. 4, the plurality of engagement holes 62 a provided in the outer peripheral edge portion of the flange portion 62 of the worm wheel 32 b are each formed as a through hole that penetrates the flange portion 62 in the axial direction. Not only this but as shown in FIG. 6, you may make it form the engagement hole 62a of the worm wheel 32b in the concave shape which does not penetrate the flange part 62. As shown in FIG. In this way, by forming the engagement hole 62a in a concave shape, lubricating oil such as grease applied to the worm gear mechanism 32 is prevented from entering the clutch rotor 52 or the armature 53 side through the engagement hole 62a. Thus, the operation reliability of the electromagnetic clutch 34 can be improved. Further, a seal member 81 formed of rubber or the like is attached between the flange portion 62 of the worm wheel 32b and the case 31, and grease is formed between the worm wheel 32b and the case 31 toward the clutch rotor 52 and the armature 53. You may make it prevent intrusion.

  FIG. 7 is a sectional view showing a modification of the electromagnetic clutch shown in FIG.

  In the electromagnetic clutch 34 shown in FIG. 4, the rotor ring 61 as a connecting member is formed in a cylindrical shape and is connected to the outer peripheral edge portion of the worm wheel 32 b and the clutch rotor 52 so as to be movable in the axial direction. On the other hand, a rotor ring 92 as a connecting member used in the electromagnetic clutch 91 shown in FIG. 7 includes an annular disc portion 92a arranged in the axial direction on the worm wheel 32b, and an outer peripheral portion of the disc portion 92a. Are formed in a cylindrical shape with a bottom integrally formed with a cylindrical portion 92b protruding in the axial direction, and a plurality of annular engaging concave and convex portions 92c provided on the disc portion 92a are in the axial direction of the worm wheel 32b. By engaging with an engaging concavo-convex portion 93 formed on the end face from the axial direction, it is connected to the worm wheel 32b so as to be integrally rotatable. The cylindrical portion 92b is disposed outside the armature 53, and the serration portion 92d provided at the axial end thereof is engaged with the serration portion 52c of the clutch rotor 52 from the axial direction. The clutch rotor 52 is connected to the outer peripheral edge portion. With this structure, the rotor ring 92 is connected to the worm wheel 32b and the clutch rotor 52 so as to be movable in the axial direction, and the outer side of the armature 53 is interposed between the worm wheel 32b and the clutch rotor 52 via the rotor ring 92. Power is transmitted from

  In FIGS. 6 and 7, members corresponding to those described above are denoted by the same reference numerals.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the opening / closing body is a sliding door 13 that opens and closes in a sliding manner. However, the present invention is not limited to this. Other opening / closing bodies may be used.

  In the present embodiment, the rotor ring 61 is made of resin. However, the present invention is not limited to this, and the rotor ring 61 may be formed into a cylindrical shape by rounding a steel plate or the like.

  Furthermore, in the present embodiment, the armature 53 is connected to the connecting member 55 and the leaf spring 56 so that power can be transmitted. However, the present invention is not limited to this, and the armature 53 and the connecting member 55 are spline-coupled to transmit power. May be directly performed between the two members without using the leaf spring 56. Further, the leaf spring 56 may be eliminated, and the armature 53 and the connection member 55 may be engaged only by the spline. In this case, the engagement between the clutch rotor 52 and the armature 53 is released when the clutch coil 71 is not energized. With such a structure, the clutch rotor 52 and the armature 53 can always be in a sliding contact state when the clutch coil 71 is not energized.

  Furthermore, in the present embodiment, the friction type is shown as the electromagnetic clutch 34 of the present invention, but the invention is not limited to this, and other types of electromagnetic clutches such as a meshing type may be used.

  Further, in the present embodiment, the case where the electromagnetic clutch 34 of the present invention is used for the motor 25 with a speed reducer and the opening / closing device 21 is shown, but the present invention is not limited to this, and the electromagnetic clutch 34 of the present invention is used for other devices. You may make it use for.

  Furthermore, in the present embodiment, the rotating body is the worm wheel 32b. However, the rotating body is not limited to this, and any member that rotates together with the first rotating member may be, for example, the first via a belt or a chain. A pulley or a sprocket connected to the rotating member may be used.

It is a side view showing a one-box type vehicle. It is a top view which shows the automatic opening / closing apparatus for vehicles which is one embodiment of this invention. It is a front view which shows the detail of the drive unit shown in FIG. It is sectional drawing which follows the output shaft of the drive unit shown in FIG. It is a disassembled perspective view which shows the connection structure with the worm wheel of a rotor ring, and a clutch rotor. It is an expanded sectional view which shows the modification of the connection structure of a worm wheel and a rotor ring. It is sectional drawing which shows the modification of the electromagnetic clutch shown in FIG.

Explanation of symbols

11 Vehicle 12 Car body 13 Sliding door (opening / closing body)
14 Guide rail 14a Bent part 15 Roller assembly 21 Automatic opening / closing device for vehicle 22 Drive unit 23a Closed side cable (strand body)
23b Open cable (strand)
24a, 24b Reversing pulley 25 Motor with reduction gear 26 Electric motor (motor body)
26a Armature shaft (rotating shaft, first rotating member)
27 Reducer 28 Output shaft (second rotating member)
28a Serration part 29 Control device 31 Case 31a Case body 31b Cover 32 Worm gear mechanism 32a Worm 32b Worm wheel (rotary body)
33a, 33b Ball bearing 34 Electromagnetic clutch 35 Unit case 36 Drum 36a Guide groove 37 Nut 41a, 41b Tensioner mechanism 42a, 42b Fixed pulley 43a, 43b Movable pulley 44 Support shafts 45a, 45b Lead portions 46a, 46b Outer tubes 47a, 47b Movable Shafts 48a, 48b Slits 49a, 49b Torsion spring 52 Clutch rotor (first clutch plate)
52a Friction surface (first engaging portion)
52b Boss part 52c Serration part 53 Armature (second clutch plate)
53a Friction surface (second engaging portion)
53b Through-hole 54 Sliding bearing 55 Connection member 56 Leaf spring 61 Rotor ring (connection member)
61a engagement protrusion 61b serration portion 62 flange portion 62a engagement hole 71 clutch coil 72 clutch yoke 81 seal member 91 electromagnetic clutch 92 rotor ring (connection member)
92a disc part 92b cylindrical part 92c engagement projection 92d serration part 93 engagement recess

Claims (8)

A clutch for intermittently transmitting power between the first rotating member and the second rotating member;
A rotating body coupled to the first rotating member so as to be capable of transmitting power and mounted to be relatively rotatable with the second rotating member;
A first clutch plate having a first engagement portion on an axial end face and mounted so as to be relatively rotatable with the second rotation member;
A coupling member disposed coaxially with the second rotating member, coupled to the rotating body on one side in the axial direction and coupled to an outer peripheral edge of the first clutch plate on the other side;
A second engaging portion opposed to the first engaging portion, coupled to the second rotating member so as to be capable of transmitting power, and wherein the second engaging portion is coupled to the first engaging portion; A clutch having a second clutch plate that is movable in an axial direction between an engaging position to be engaged and a releasing position to be disengaged.   The clutch according to claim 1, wherein the coupling member is coupled to the rotating body and the first clutch plate so as to be movable in an axial direction.   3. The clutch according to claim 1, wherein the connecting member is formed in a cylindrical shape that connects an outer peripheral edge of the rotating body and an outer peripheral edge of the first clutch plate, and the rotating body and the first A clutch, wherein the second clutch plate is disposed between the clutch plate and inside the connecting member.   The clutch according to claim 3, wherein the magnetic attraction is disposed opposite to the second clutch plate with the first clutch plate interposed therebetween, and moves the second clutch plate from the release position to the engagement position. A clutch having a clutch coil for generating force. A motor with a speed reducer comprising a motor body having a rotating shaft and a speed reducing mechanism that decelerates the rotation of the rotating shaft and outputs from the output shaft,
A worm that rotates integrally with the rotating shaft;
A worm wheel which is mounted so as to be rotatable relative to the output shaft, meshes with the worm and forms the speed reduction mechanism with the worm;
A first clutch plate provided with a first engagement portion on an axial end face and mounted on the output shaft so as to be relatively rotatable;
A coupling member disposed coaxially with the output shaft, coupled to the worm wheel on one side in the axial direction and coupled to the outer peripheral edge of the first clutch plate on the other side;
A second engagement portion opposed to the first engagement portion, coupled to the output shaft so as to be able to transmit power, and the second engagement portion engages with the first engagement portion; A second clutch plate that is axially movable between an engagement position and a release position at which the engagement is released;
A motor with a reduction gear, wherein power transmission between the rotating shaft and the output shaft can be interrupted.   6. The motor with a reduction gear according to claim 5, further comprising a resin case that accommodates the speed reduction mechanism, the first clutch plate, and the second clutch plate. An automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body provided in a vehicle,
A rotating shaft driven to rotate by the motor body;
An output shaft connected to the opening / closing body and rotating in conjunction with the opening / closing operation of the opening / closing body;
A rotating body that is connected to the rotating shaft and is rotatably mounted on the output shaft, and rotates together with the rotating shaft;
A first clutch plate provided with a first engagement portion on an axial end face and mounted on the output shaft so as to be relatively rotatable;
A coupling member disposed coaxially with the output shaft, coupled to the rotating body on one side in the axial direction and coupled to the outer peripheral edge of the first clutch plate on the other side;
A second engagement portion opposed to the first engagement portion, coupled to the output shaft so as to be able to transmit power, and the second engagement portion engages with the first engagement portion; A second clutch plate that is axially movable between an engagement position and a release position at which the engagement is released;
An automatic opening and closing device for a vehicle, wherein power transmission between the rotating shaft and the output shaft can be interrupted.   8. The automatic opening / closing device for a vehicle according to claim 7, further comprising: a drum fixed to the output shaft; and a rope body that is stretched over the drum and connected to the opening / closing body, and is pulled by the rope body. An automatic opening / closing device for a vehicle, wherein the opening / closing body is opened and closed.

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