JP2010048051A - Automatic opening/closing device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To thin (miniaturize) a driving unit. <P>SOLUTION: A supporting shaft 36 and an output shaft 47 parallel with each other are rotatably supported in a case 26 of the driving unit 22 and connected in a power transmissible manner by a spur gear 48 on one axial end side. A worm gear mechanism 32 and an electromagnetic clutch 41 are arranged on the other axial end side of the supporting shaft 36, and a driving drum 55 is arranged on the other axial end side of the output shaft 47 to reduce and transmit rotational drive of an electric motor 27 to the driving drum 55 through the worm gear mechanism 32, the electromagnetic clutch 41 and the spur gear 48. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body such as a slide door provided in the vehicle.

  Conventionally, in a wagon type or one box type vehicle, a sliding door that opens and closes in the vehicle front-rear direction is provided on the side of the vehicle body, so that it is possible to easily get on and off from the side of the vehicle and load and unload luggage. The sliding door is normally manually opened and closed, but in recent years, there are many vehicles in which the sliding door is automatically opened and closed by an automatic opening and closing device mounted on the vehicle. As such an automatic opening / closing device, a cable type device that automatically opens and closes a sliding door by pulling a cable (strip body) connected to the sliding door from the vehicle longitudinal direction by a drive unit is known. ing.

  The drive unit of the automatic opening / closing device includes a speed reduction mechanism so that a desired drive force can be obtained from a small electric motor. As the speed reduction mechanism, a worm gear mechanism that is small and has a large reduction ratio is often used, and this worm gear mechanism is composed of a worm provided integrally with a rotating shaft of an electric motor and a worm wheel that meshes with the worm. ing. The drive unit also includes a clutch mechanism for intermittently transmitting power between the rotating shaft of the electric motor and the output shaft. When the sliding door is manually opened and closed, the clutch mechanism can The transmission is cut off to reduce manual operation force.

As described above, the drive unit has the speed reduction mechanism and the clutch mechanism, transmits the rotational drive of the rotary shaft to the output shaft through the speed reduction mechanism and the clutch mechanism, and is a drive rotary body fixed to the output shaft. The cable is pulled to open and close the sliding door. The speed reduction mechanism, the clutch mechanism, and the driving rotator are built in the case of the driving unit. For example, Patent Document 1 describes a drive unit in which a speed reduction mechanism, a clutch mechanism, and a drive rotator are incorporated in a case.
JP 2000-179233 A

  By the way, the drive unit of the automatic opening / closing device for a vehicle is mounted inside the vehicle body or inside an opening / closing body such as a sliding door. It becomes difficult to install the inside. For this reason, it is desired to reduce the axial length of the output shaft of the drive unit to make the drive unit thinner (smaller).

  In the drive unit shown in Patent Document 1, a transmission mechanism is arranged between the speed reduction mechanism and the clutch mechanism, and the rotational drive of the electric motor is transmitted in the order of the speed reduction mechanism, the transmission mechanism, the clutch mechanism, and the drive rotor. ing. In other words, the transmission mechanism, the clutch mechanism, and the driving rotator are arranged on the same shaft on the output shaft side in the case, and this requires a certain axial direction (thickness direction) length of the output shaft. There was a problem that it was difficult to make the drive unit thin (small).

  An object of the present invention is to make the drive unit thinner (smaller).

  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, the driving source being provided on either the vehicle body or the opening and closing body, and the driving source. And a worm provided integrally with a rotating shaft to which the power of the drive source is transmitted, and a worm wheel that meshes with the worm and is rotatably supported by the case. A first rotating body that rotates integrally with the worm wheel, and a second rotating body that is detachably disposed in the axial direction with respect to the first rotating body, The power transmission to and from the second rotating body is interrupted, and a clutch mechanism housed in the case, a transmission member provided so as to rotate integrally with the second rotating body, and a rotation to the case A transmission member housed in the case, which is supported freely and is rotatably provided around an axis parallel to the axis of the transmission member and coupled to the transmission member so as to be capable of transmitting power. It has a mechanism, a drive rotator provided so as to be rotatable together with the member to be transmitted, and an actuating member for transmitting the power of the drive rotator to the opening / closing body.

  The automatic opening / closing apparatus for a vehicle according to the present invention is characterized in that the transmission mechanism transmits the rotational drive of the transmission member at a reduced speed to the transmitted member.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that the worm wheel is integrally provided on an outer peripheral portion of the first rotating body.

  In the automatic opening / closing device for a vehicle according to the present invention, the clutch mechanism is an electromagnetic clutch that connects the first rotating body and the second rotating body by magnetic force, and the second rotating body in the first rotating body A clutch coil for generating the magnetic force is arranged on the opposite side in the axial direction, and the transmission member is arranged on the opposite side in the axial direction from the first rotating body in the second rotating body. And

  In the automatic opening and closing device for a vehicle of the present invention, an annular recess is formed on the transmitted member on the side facing the drive rotating body, and a magnet that rotates integrally with the output shaft is disposed in the recess. The case is characterized in that a sensor substrate is accommodated in which a sensor is provided which extends between the transmitted member and the driving rotating body and faces the magnet.

  The automatic opening and closing device for a vehicle according to the present invention is a strip body in which one end of the operating member is wound around the driving rotating body and the other end is connected to either the vehicle body or the opening and closing body. In the case, a pulley that is located on the side of the drive rotating body and is rotatable about an axis parallel to the output shaft and on which the strip is wound, and biasing the pulley And a tensioner mechanism including an urging means for applying a predetermined tension to the cable body.

  According to the present invention, the shaft center of the transmission member and the shaft center of the transmitted member are provided in parallel to each other in the case so as to be able to transmit power, and the speed is reduced to one axial end side of the shaft center on the transmission member side. Since the mechanism and the clutch mechanism are disposed, and the drive rotator is disposed so as to be rotatable integrally with the member to be transmitted, it is not necessary to stack the clutch mechanism and the drive rotator in the axial direction, and the shaft center of the transmission member The drive unit can be thinned by shortening the axial length of the shaft center of the member to be transmitted.

  According to the present invention, since the transmission mechanism that decelerates and transmits the rotational drive of the transmission member to the transmitted member, the required torque can be increased by this deceleration, and thus the clutch in which the holding torque of the clutch mechanism is reduced. A mechanism can be configured. In addition, the clutch can be reduced in size, and the worm wheel can be integrally provided on the outer peripheral portion of the first rotating body without increasing the size of the worm wheel. As a result, it is not necessary to stack the worm wheel and the first rotating body in the axial direction, so that the drive unit can be made thinner (smaller).

  According to the present invention, the clutch mechanism is constituted by an electromagnetic clutch, the clutch coil for generating magnetic force is provided on the first rotating body on the opposite side to the second rotating body, and the transmission member is provided on the second rotating body. Since it is arranged on the opposite side of the rotating body in the axial direction, the worm wheel provided integrally with the outer peripheral portion of the first rotating body is positioned in the axially intermediate portion of the rotating shaft, that is, in the central portion in the thickness direction of the case. As a result, the drive source is disposed with its axis centered at the center in the thickness direction of the case, so that the protrusion of the drive source in the thickness direction with respect to the case is suppressed, and the drive is driven. The unit can be made thinner (smaller).

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

  FIG. 1 is a side view showing a vehicle provided with a slide door, and FIG. 2 is a plan view showing a structure for attaching the slide door shown in FIG. 1 to a vehicle body.

  A vehicle 11 shown in FIG. 1 is a one-box type passenger car, and a slide door 14 serving as an opening / closing body for opening / closing the opening 13 is provided on a side of the vehicle body 12. A guide rail 15 extending in the vehicle front-rear direction is fixed to the side of the vehicle body 12 and behind the opening 13 (right side in FIG. 1), and the slide door 14 extends along the guide rail 15 in the vehicle front-rear direction. The opening 13 can be freely opened and closed, and is used by opening it to a desired opening when a passenger gets on and off and loads and unloads luggage.

  As shown in FIG. 2, a roller unit 16 is provided at an end portion of the slide door 14 on the vehicle rear side and at a substantially central portion in the vehicle vertical direction. The roller unit 16 is movably mounted on the guide rail 15. When the roller unit 16 is moved along the guide rail 15, the slide door 14 is slid along the guide rail 15 in the vehicle front-rear direction. It is like that.

  The guide rail 15 includes a straight portion 15a extending in the vehicle front-rear direction along the side portion of the vehicle body 12, and a lead-in portion 15b curved from the end portion of the straight portion 15a on the vehicle front side toward the vehicle inner side. . When the roller unit 16 is guided to the end of the guide rail 15 on the vehicle rear side (straight line portion 15a side), the slide door 14 is disposed on the vehicle outer side than the side surface of the vehicle body 12, and the two-dot chain line in FIG. It becomes a fully open position shown by. On the other hand, when the roller unit 16 is guided to the end portion of the guide rail 15 on the front side of the vehicle (the retracting portion 15b side), the slide door 14 is placed inward of the vehicle so that the side surface thereof is flush with the side surface of the vehicle body 12. The fully closed position indicated by the solid line in FIG.

  Although not shown, the roller unit 16 is also provided at the upper and lower ends (upper and lower parts) of the vehicle front side of the slide door 14 in addition to the illustrated part (center part). Guide rails 15 corresponding to the upper portion and the lower portion are respectively provided at the upper and lower edge portions of the opening portion 13 of the vehicle body 12, and the slide doors 14 are supported by the vehicle body 12 at a total of three locations so as to be opened and closed.

  The vehicle 11 is provided with a slide door opening / closing device 21 (hereinafter referred to as an opening / closing device 21) as an automatic opening / closing device for the vehicle in order to automatically open and close the slide door 14. The opening / closing device 21 is a so-called cable type, and a drive unit 22 disposed inside the vehicle body 12 adjacent to a substantially central portion of the guide rail 15 in the vehicle front-rear direction, and the slide door 14 is pulled by the drive unit 22. A closed cable 23a and an open cable 23b are provided as actuating members (strands) for the purpose. The closed cable 23a is guided to the roller unit 16 from the closed side (the vehicle front side) via a reversing pulley 24a provided at the end of the guide rail 15 on the vehicle front side. Connected to the door 14). On the other hand, the open cable 23b is led to the roller unit 16 from the open side (rear side of the vehicle) via a reversing pulley 24b provided at the end of the guide rail 15 on the rear side of the vehicle. It is connected to (slide door 14). The other ends of the cables 23a and 23b are connected to the drive unit 22, respectively, and the sliding door 14 is automatically closed by pulling the closed cable 23a with the drive unit 22, and the open cable 23b is connected to the drive unit 22. The sliding door 14 is automatically opened by towing the door.

  3 is a partially cutaway cross-sectional view of the drive unit shown in FIG. 2, and is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 3, the drive unit 22 includes a resin case 26 disposed on the vehicle body 12 and an electric motor (drive motor) 27 as a drive source attached to the case 26. A brushed DC motor is used as the electric motor 27, and a rotary shaft (armature shaft) 28 provided in the electric motor 27 is rotatable in both forward and reverse directions.

  The electric motor 27 is attached to a worm housing 30 provided in the case 26. The worm housing part 30 extends in the axial direction of the rotary shaft 28 and is open to the electric motor 27 side. The electric motor 27 is fixed to the end surface on the opening side of the worm housing part 30, so that one end side of the rotary shaft 28 in the axial direction. (Left side in FIG. 3) protrudes into a worm accommodating chamber 30 a formed inside the worm accommodating portion 30. A brush holder (not shown) is attached to the opening of the worm storage chamber 30a. A drive current is supplied to the electric motor 27 through the brush holder, and the rotary shaft 28 is rotated in the forward direction or the reverse direction. It is like that.

  The electric motor 27 is not limited to a DC motor with a brush, and other electric motors such as a brushless motor may be used as long as the rotating shaft 28 rotates in both forward and reverse directions.

  The rotational drive of the rotary shaft 28 is transmitted at a reduced speed by a worm gear mechanism 32 as a reduction mechanism incorporated in the case 26. The worm gear mechanism 32 has a worm 28a that is provided integrally with the protruding portion of the rotating shaft 28 that protrudes into the worm storage chamber 30a and rotates together with the rotating shaft 28, and a gear portion 33a that meshes with the worm 28a. An annular worm wheel 33 is provided.

  The case 26 is provided with a worm wheel accommodating portion 34 adjacent to the worm accommodating portion 30 on the left side in FIG. 4, and the worm wheel 33 is a worm wheel accommodating chamber formed inside the worm wheel accommodating portion 34. 34a. The worm wheel housing portion 34 has a substantially cylindrical shape with the direction perpendicular to the rotation shaft 28, that is, the thickness direction of the case 26 (vertical direction in FIG. 4) as the axial direction, and a partition wall 35 a partitioning the inside of the case 26; A worm wheel housing chamber 34a is formed in the interior by a cylindrical wall portion 35b extending from the partition wall 35a to one axial end (the lower side in FIG. 4) and a cover 35c that is detachably attached to the opening of the cylindrical wall portion 35b. Is formed.

  On the back side (upper side in FIG. 4) of the worm wheel housing portion 34 of the case 26, a gear housing portion 50 is provided adjacent thereto, and a transmission gear 43 (to be described later) is housed in the gear housing portion 50. Yes. The gear housing portion 50 has a substantially cylindrical shape that is coaxial with the worm wheel housing portion 34 and opens in the opposite direction, a cylindrical wall portion 35d that extends from the partition wall 35a to the other axial end (upper side in FIG. 4), and a cylinder. A gear housing chamber 50a is formed inside by a cover 35e that is detachably attached to the opening of the wall 35d.

  A through hole communicating with the gear housing portion 50 is formed in the central portion of the partition wall 35a in the worm wheel housing chamber 34a, and the other axial end side of the support shaft 36 is rotatably supported by the cover 35e through the partition wall 35a. ing. The axial center of the worm wheel housing chamber 34a is rotatably supported at one axial end side of a support shaft 36 that penetrates the partition wall 35a. The worm wheel 33 is rotatable relative to the support shaft 36 via a clutch rotor 37. It is supported by. Further, a communication hole 38 is formed in the cylindrical wall portion 35b on the worm housing portion 30 side so as to communicate the worm housing chamber 30a and the worm wheel housing chamber 34a. The worm 28a and the gear portion 33a of the worm wheel 33 are defined as follows. They are engaged through the communication hole 38. By this worm gear mechanism 32, the rotational drive of the rotary shaft 28 is decelerated to a predetermined speed, and the increased torque is transmitted to the support shaft 36 via an electromagnetic clutch 41 as a clutch mechanism. .

  FIG. 5A is a cross-sectional view showing a power cutoff state of the electromagnetic clutch, and FIG. 5B is a cross-sectional view showing a power transmission state of the electromagnetic clutch. This electromagnetic clutch 41 for intermittently transmitting power between the worm wheel 33 and the support shaft 36 is incorporated in the worm wheel accommodating chamber 34a. The electromagnetic clutch 41 is a so-called friction type, and includes a clutch rotor 37 as a first rotating body and an armature 42 as a second rotating body.

  As shown in FIG. 5, the clutch rotor 37 is formed of a steel material in an annular shape having a substantially U-shaped cross section, and a concave portion 37a formed in the center portion in the radial direction is arranged facing the cover 35c side. The clutch rotor 37 is supported at one end in the axial direction of the support shaft 36 so as to be relatively rotatable at a boss portion 37b provided at the shaft center thereof. The outer diameter of the clutch rotor 37 corresponds to the inner diameter of the worm wheel 33, the worm wheel 33 is integrally fixed to the outer peripheral portion of the clutch rotor 37, and the clutch rotor 37 is rotated integrally with the worm wheel 33.

  On the other hand, the armature 42 is formed of a steel material in an annular shape having substantially the same diameter as the clutch rotor 37, and is disposed coaxially between the clutch rotor 37 and the partition wall 35a. The armature 42 is attached to a transmission gear 43 fixed to the support shaft 36, and the armature 42 is rotated together with the support shaft 36 together with the transmission gear 43. Friction surfaces 37c and 42a are formed on the axially opposite end surfaces of the clutch rotor 37 and the armature 42, respectively. As shown in FIG. 5A, the armature 42 is in the power cutoff state of the electromagnetic clutch 41. The friction surface 42 a faces the friction surface 37 c of the clutch rotor 37 with a slight gap.

  The armature 42 is attached to the outer peripheral portion of one end in the axial direction of the transmission gear 43 at its inner peripheral portion by spline engagement, and the armature 42 is axially one end side toward the clutch rotor 37 side with respect to the transmission gear 43 ( It is movable to the lower side in FIG. 5 and connected to the support shaft 36 via the transmission gear 43 so as to rotate integrally. As a result, the armature 42 is moved to the clutch rotor 37 side as shown in FIG. 5B, and the engagement position where the friction surfaces 37c and 42a are engaged is shown in FIG. 5A. As described above, the friction surface 42a of the armature 42 moves in the axial direction between the friction surface 37c of the clutch rotor 37 and the disengagement position where these engagements are released. .

  An annular clutch coil 44 is incorporated in the worm wheel housing chamber 34a in order to apply an urging force (magnetic force) in the direction toward the clutch rotor 37 to the armature 42 to switch the armature 42 from the release position to the engagement position. It is. The clutch coil 44 is disposed on the side of the clutch rotor 37 opposite to the armature 42 in the axial direction, and is fixed to the inner surface of the cover 35 c so as to protrude into the recess 37 a of the clutch rotor 37. When the clutch coil 44 is energized, the armature 42 is moved from the release position to the engagement position by the magnetic attractive force generated by the clutch coil 44, and the electromagnetic clutch 41 is switched to the power transmission state. Further, since the moving distance between the engagement position and the release position of the armature 42 is small, when the energization to the clutch coil 44 is released, the urging force in the direction toward the partition wall 35a is not applied to the armature 42. Even so, the armature 42 is naturally moved from the engagement position to the release position, and the electromagnetic clutch 41 is switched to the power cut-off state. When such an electromagnetic clutch 41 is switched to the power transmission state, the rotational drive of the rotary shaft 28 is transmitted to the support shaft 36 (transmission gear 43) via the worm gear mechanism 32 and the electromagnetic clutch 41.

  FIG. 6 is a partially cutaway sectional view taken along the line CC in FIG. The drive unit 22 incorporates a spur gear 48 as a transmission mechanism that transmits the rotational drive of the support shaft 36 to an output shaft 47 having an axis parallel to the axis of the support shaft 36. The spur gear 48 includes a transmission gear 43 as a transmission member and a transmitted gear 49 as a transmitted member.

  The transmission gear 43 is disposed on the side opposite to the clutch rotor 37 in the armature 42, is fixed to the support shaft 36, and is rotated integrally with the support shaft 36. The transmission gear 43 is a spur gear, and a plurality of teeth are formed on the outer periphery thereof. As described above, one end side of the transmission gear 43 in the axial direction penetrates the partition wall 35a together with the support shaft 36 and protrudes into the worm wheel housing chamber 34a. Has been.

  On the other hand, the case 26 is provided with a gear accommodating portion 51 on the left side of the gear accommodating portion 50 in FIG. 4 so as to be adjacent thereto, and the transmitted gear 49 is a gear accommodating chamber formed in the gear accommodating portion 51. 51a. The gear housing portion 51 has a substantially cylindrical shape that is larger in diameter than the gear housing portion 50 and opens in the same direction as the gear housing portion 51, and has a partition wall 35 f that partitions the inside of the case 26, and the other end in the axial direction from the partition wall 35 f. A gear housing chamber 51a is formed in the interior by a cylindrical wall portion 35g extending to the side and a cover 35e that is detachably attached to the opening of the cylindrical wall portion 35g. In the present embodiment, the cover 35e attached to the opening of each gear accommodating portion 50, 51 is composed of one component, and the gear accommodating portions 50, 51 are simultaneously closed.

  The other end in the axial direction of the output shaft 47 is rotatably supported at the central portion of the partition wall 35f in the gear housing chamber 51a, and the transmitted gear 49 is fixed to the other end in the axial direction of the output shaft 47 to be output shaft. 47 is rotated together. The transmitted gear 49 is a spur gear having a diameter larger than that of the transmission gear 43, and a plurality of teeth larger than the number of teeth of the transmission gear 43 are formed on the outer peripheral portion thereof. That is, the spur gear 48 is a reduction gear that reduces and transmits the rotational drive of the transmission gear 43 to the transmitted gear 49.

  As shown in FIG. 6, the cylindrical wall portions 35d and 35g of the gear housing portions 50 and 51 are integrated by partly cutting away the mutually facing sides, and communicating with the gear housing chambers 50a and 51a. A hole 52 is formed. The transmission gear 43 and the transmitted gear 49 are meshed with each other through the communication hole 52, and the spur gear 48 reduces the rotational drive of the support shaft 36 to a predetermined speed, and the rotation with a high torque is output to the output shaft 47. To be communicated to.

  A driving drum 55 as a driving rotating body that pulls the cables 23a and 23b is fixed to one end side of the output shaft 47 in the axial direction.

  The case 26 is provided with a drum accommodating portion 56 on the back side (lower side in FIG. 4) of the gear accommodating portion 51, that is, on the left side of the worm wheel accommodating portion 34 in FIG. It is accommodated in a drum accommodating chamber 56 a formed inside the drum accommodating portion 56. The drum housing portion 56 has a substantially cylindrical shape that is coaxial with the gear housing portion 51 and opens in the opposite direction, and includes a partition wall 35f that partitions the drum storage chamber 56a and the gear storage chamber 51a, and one axial end side (from the partition wall 35f). A drum housing chamber 56a is formed in the interior by a cylindrical wall portion 35h extending to the lower side in FIG. 4 and a cover 35c that is detachably attached to the opening of the cylindrical wall portion 35h.

  An axial end of the output shaft 47 penetrating the partition wall 35f is rotatably supported at the axial center of the drum storage chamber 56a, and the driving drum 55 is fixed to the axial end of the output shaft 47 for output. It is rotated integrally with the shaft 47. The driving drum 55 is formed in a substantially cylindrical shape, and the other end side of the closed side cable 23a and the open side cable 23b led into the drive unit 22 is wound around the outer periphery in opposite directions. When the decelerated rotation is transmitted to the driving drum 55 via the worm gear mechanism 32, the electromagnetic clutch 41, and the spur gear 48, one of the cables 23a and 23b is wound around the driving drum 55 according to the rotation direction. At the same time, the other cables 23a and 23b are sent out from the driving drum 55, and the slide door 14 is pulled and pulled automatically by the cables 23a and 23b.

  As shown in FIG. 4, the movement of the support shaft 36 and the clutch rotor 37 in the axial direction facing each other is restricted by a step formed at the other axial end of the support shaft 36. The other end in the axial direction of the shaft 36 is rotatably supported by the cover 35e via the bearing 58, and the clutch rotor 37 is rotatably supported by the clutch coil 44 via the bearing 59 on one end thereof. Are accommodated in the case 26 so as to be rotatable relative to each other. Further, the output shaft 47 is rotatably supported by the partition wall 35f via the bearing 60 at the axial central portion thereof, and is rotated by the cover 35c via the bearing 61 and the driving drum 55 at the other axial end side. It is supported freely.

  As described above, the support shaft 36 and the output shaft 47 that are parallel to each other are rotatably provided in the case 26 and are connected so as to be able to transmit power by the spur gear 48, and the worm gear mechanism 33 is connected to one end of the support shaft 36 in the axial direction. In addition, since the electromagnetic clutch 41 and the driving drum 55 are arranged on one end side of the output shaft 47 in the axial direction, it is not necessary to stack the electromagnetic clutch 41 and the driving drum 55 in the axial direction. Further, the drive unit 22 can be thinned by shortening the axial length of the output shaft 47.

  Further, since the driving drum 55 and the electromagnetic clutch 41 are arranged side by side in the direction orthogonal to the thickness direction of the case 26 (left and right direction in FIG. 4), the driving unit 22 is driven without increasing its thickness. The diameter of the drum 55 can be reduced. That is, usually, when the diameter of the driving drum 55 is reduced, it is necessary to increase the thickness of the driving drum 55 in order to ensure a predetermined winding amount of each cable 23a, 23b. However, when the driving drum 55 and the electromagnetic clutch 41 are arranged side by side as in the present invention, the driving drum 55 (output shaft 47 side) does not become thicker than the electromagnetic clutch 41 (support shaft 36 side). Thus, the diameter of the drive drum 55 can be reduced without increasing the thickness of the drive unit 22. Thereby, since the drive torque at the time of pulling each cable 23a, 23b is reduced, each member (the electromagnetic clutch 41, the spur gear 49, etc.) can be miniaturized, and the drive unit 22 can be miniaturized. In the present embodiment, the drive drum 55 is of a type that does not have a guide groove for guiding the winding of the cables 23a and 23b, and the side surfaces of adjacent cables wound around the drive drum 55 are connected to each other. Since the cables are sequentially wound as a guide, the cables 23a and 23b can be tightly wound around the outer periphery of the driving drum 55, and the diameter of the driving drum 55 can be further reduced. .

  Furthermore, since the drive unit 22 is configured using a reduction gear as the spur gear 48 as a transmission mechanism, the holding torque of the electromagnetic clutch 41 is reduced, the electromagnetic clutch 41 can be reduced in size, and the worm wheel 33 can be increased in size. The worm wheel 33 can be disposed on the outer periphery of the clutch rotor 37. As a result, the worm wheel 33 and the clutch rotor 37 need not be stacked in the axial direction, so that the drive unit 22 can be further reduced in thickness (downsized).

  Furthermore, since the worm wheel 33 is integrally provided on the outer periphery of the clutch rotor 37, the thickness of the worm gear mechanism 32 and the electromagnetic clutch 41 disposed on the other axial end side of the support shaft 36 can be reduced.

  Further, the clutch mechanism 41 is composed of an electromagnetic clutch, a clutch coil 44 for generating magnetic force is provided on the opposite side of the clutch rotor 37 in the axial direction with respect to the armature 42, and the transmission gear 43 is provided in the axial direction of the armature 42 with respect to the clutch rotor 37. Since it is arranged on the opposite side, the worm wheel 33 provided integrally with the outer peripheral portion of the clutch rotor 37 is arranged at a substantially intermediate portion in the axial direction of the support shaft 36 that is the rotation axis thereof, that is, in the center in the thickness direction of the case 26. Since the electric motor 27 is disposed with its axis centered at the center of the thickness direction of the case 26, the electric motor 27 protrudes from the case 26 in the thickness direction. As a result, the drive unit 22 can be made thinner (smaller).

  In the embodiment, the armature 42 is attached to the transmission gear 43 fixed to the support shaft 36 by spline engagement. For example, the armature 42 is attached to the support shaft 36 by spline engagement, By mounting the armature 42 via the transmission gear 43 or the support shaft 36 and a leaf spring member, the armature 42 is movable toward the one end side in the axial direction toward the clutch rotor 37 side and rotates integrally with the support shaft 36. You may do it. Further, the armature 42 as the first rotating body is provided so as to be movable in the axial direction toward the clutch rotor 37 and so as to rotate integrally with the worm wheel 33, and the clutch rotor 37 as the second rotating body is supported by the support shaft. It may be provided so as to rotate integrally with 36.

  Furthermore, in the above-described embodiment, the worm wheel 33 including the gear portion 33a is integrally fixed to the outer periphery of the clutch rotor 37. However, the gear portion 33a is formed on the outer periphery of the clutch rotor 37, and the worm wheel is formed. 33 and the clutch rotor 37 may be provided integrally.

  As shown in FIG. 3, the drive unit 22 is provided with a pair of tensioner mechanisms 64 for applying a predetermined tension to the cables 23 a and 23 b extending from the drive drum 55 to the outside of the case 26. Yes. Each tensioner mechanism 64 includes a tensioner pulley 65 over which the cables 23a and 23b are stretched, and a coil spring 66 as a biasing unit that biases the tensioner pulley 65 and applies a predetermined tension to the cables 23a and 23b. I have.

  The case 26 is provided with a pair of tensioner accommodating portions 67 adjacent to the left and right sides of the drum accommodating portion 56 in FIG. 3, and each tensioner mechanism 64 includes a tensioner accommodating portion formed inside the tensioner accommodating portion 67. It is accommodated in the chamber 67a. The tensioner accommodating portion 67 has a case shape that opens in the same direction as the drum accommodating portion 56, and a cover 35c is detachably attached to the opening, and a tensioner accommodating chamber 67a is formed therein. Each tensioner accommodating chamber 67 a communicates with the drum accommodating chamber 56 a via a cable lead-out portion 68 provided in the cylindrical wall portion 35 h of the drum accommodating portion 56, and via a cable entry / exit portion 69 provided in the tensioner accommodating portion 67. And communicates with the outside of the case 26. Each cable 23a, 23b, one end of which is connected to the driving drum 55, is drawn into the tensioner accommodating chamber 67a via the cable pulling portion 68, and is wound around the tensioner pulley 65 accommodated in the tensioner accommodating chamber 67a. It is pulled out of the case 26 through the access portion 69.

  The tensioner pulley 65 is rotatably supported by a support shaft 71 provided on the holder 70, and the holder 70 is increased in a direction (upward direction in FIG. 3) in which the moving path of each cable 23a, 23b is increased by the coil spring 66. It is energized. As a result, the cables 23a and 23b are urged by the tensioner mechanism 64 to be applied with a predetermined tension, and the roller unit 16 is guided to the retracting portion 15b of the guide rail 15, so that the moving path length of the cables 23a and 23b is increased. Even if changes, the tension is kept constant.

  The case 26 and the reversing pulleys 24a and 24b are connected by flexible outer tubes 72a and 72b. The cables 23a and 23b are connected between the case 26 and the reversing pulleys 24a and 24b. The outer tubes 72a and 72b are inserted and moved along the outer tubes 72a and 72b.

  As shown in FIG. 4, the drive unit 22 is provided with a sensor unit 75 for detecting the rotation of the output shaft 47. The sensor unit 75 includes a magnet 76 that rotates integrally with the output shaft 47, and a rotation sensor 77 that detects the magnetism of the magnet 76.

  An annular recess 49 a is formed in the transmitted gear 49 on the end face in the axial direction facing the driving drum 55, and the magnet 76 is positioned in the recess 49 a and fixed to the transmitted gear 49. The magnet 76 is formed in an annular shape with the output shaft 47 as the center, and is a multipolar magnetized magnet in which a plurality of magnetic poles are aligned and magnetized in the circumferential direction.

  On the other hand, the partition wall 35f of the case 26 is provided with a substrate housing chamber 78a formed so as to be recessed from the outside of the case 26. The rotation sensor 77 is a control substrate as a sensor substrate positioned and accommodated in the substrate housing chamber 78a. 79. The control board 79 extends between the transmitted gear 49 and the driving drum 55, and the rotation sensor 77 is mounted so as to face the magnet 76 in the axial direction. The rotation sensor 77 is a Hall element. When the magnet 76 rotates together with the output shaft 47, a pulse signal having a cycle inversely proportional to the rotation speed is output. The output of the rotation sensor 77 is input to the control board 79, and the control board 79 recognizes the rotation speed of the output shaft 47, that is, the opening / closing speed of the slide door 14, based on the input pulse signal.

  In the above embodiment, the magnet 76 of the sensor unit 75 is attached to the transmitted gear 49 to detect the rotation of the output shaft 47. However, the magnet 76 is attached to the driving drum 55. Of course it is good. Alternatively, the sensor unit 75 may be disposed on the support shaft 36 side to detect the rotation of the support shaft 36. Further, the rotation sensor 77 is not limited to the Hall element, and other sensors may be used as long as they can detect the rotation of the output shaft 47 or the support shaft 36 in pairs with a detection object such as the magnet 76. Good.

  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 above-described embodiment, the present invention is applied to the slide door opening and closing device 21. However, the present invention is not limited to this, and other applications such as a back door opening and closing device that automatically opens and closes a back door of a vehicle. The present invention may be applied to an automatic opening / closing device for a vehicle used in the vehicle.

  In the above-described embodiment, the drive unit 22 is disposed inside the vehicle body 12 so that the cables 23a and 23b are connected to the slide door 14. However, the present invention is not limited thereto, and the drive unit 22 is connected to the slide door. It is good also as a structure arrange | positioned in 14 and fixing each cable 23a, 23b to the both ends of the guide rail 15 via the roller unit 16 site | part of the slide door 14. FIG.

  Furthermore, in the above-described embodiment, the spur gear 48 is configured by two gears, that is, the transmission gear 43 and the transmitted gear 49, but may be configured by three or more gears. Further, the transmission mechanism is not limited to the spur gear 48, and for example, a belt wheel may be used.

  Further, in the above-described embodiment, the support shaft 36 and the worm wheel 33 are rotatable relative to each other, and the transmission gear 43 as a transmission member is fixed to the support shaft 36. The worm wheel 33 is a stator, the transmission gear 43 and the support shaft 36 are rotatable relative to each other, or the worm wheel 33 and the transmission gear 43 are directly supported by the case 26 so that the support shaft 36 can be omitted. You may make it do.

  Similarly, in the above-described embodiment, the transmission gear 49 as the transmission member and the driving drum 55 as the driving rotating body are fixed to the output shaft 47, but not limited thereto, the transmission gear 49 is not limited thereto. And the driving drum 55 may be connected together so as to be integrally rotatable, and the output shaft 47 may be omitted by directly supporting the transmitted gear 49 and the driving drum 55 on the case 26. .

  Furthermore, in the above-described embodiment, the driving drum 55 is used as the driving rotator and the rope is used as the operating member. However, the present invention is not limited to this. For example, the driving rotator is used as a driving gear and the operating member is driven. It is good also as an output gear and a rack which meshes with a gear.

It is a side view of a one box type vehicle. It is a top view which shows the attachment structure to the vehicle body of the slide door shown in FIG. FIG. 3 is a partially cutaway sectional view of the drive unit shown in FIG. 2. It is sectional drawing which follows the BB line in FIG. (A) is sectional drawing which shows the power interruption state of an electromagnetic clutch, (B) is sectional drawing which shows the power transmission state of an electromagnetic clutch. FIG. 5 is a partially cutaway cross-sectional view taken along line CC in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Vehicle 12 Car body 13 Opening part 14 Sliding door (opening-closing body)
15 Guide rail 15a Straight line portion 15b Pull-in portion 16 Roller unit 21 Slide door opening / closing device (automatic vehicle opening / closing device)
22 Drive unit 23a Closed side cable (actuating member / strand)
23b Open-side cable (actuating member / strand)
24a, 24b Reverse pulley 26 Case 27 Electric motor (drive motor)
28 Rotating shaft 28a Worm 30 Worm housing part 30a Worm housing chamber 32 Worm gear mechanism (deceleration mechanism)
33 Worm wheel 33a Gear portion 34 Worm wheel housing portion 34a Warm wheel housing chamber 35a Partition wall 35b Cylindrical wall portion 35c Cover 35d Cylindrical wall portion 35e Cover 35f Partition wall 35g Cylindrical wall portion 35h Cylindrical wall portion 36 Support shaft 37 Clutch rotor (first rotation) body)
37a Recessed portion 37b Boss portion 37c Friction surface 38 Communication hole 41 Electromagnetic clutch (clutch mechanism)
42 Armature (second rotating body)
42a Friction surface 43 Transmission gear (transmission member)
44 Clutch coil 47 Output shaft 48 Spur gear (transmission mechanism)
49 Transmitted gear (transmitted member)
49a Concave portion 50 Gear housing portion 50a Gear housing chamber 51 Gear housing portion 51a Gear housing chamber 52 Communication hole 55 Drum for driving (drive rotor)
56 Drum accommodating part 56a Drum accommodating chamber 58-61 Bearing 64 Tensioner mechanism 65 Tensioner pulley (pulley)
66 Coil spring (biasing means)
67 Tensioner accommodating portion 67a Tensioner accommodating chamber 68 Cable lead-out portion 69 Cable entry / exit portion 70 Holder 71 Support shafts 72a, 72b Outer tube 75 Sensor unit 76 Magnet 77 Rotation sensor 78a Substrate accommodating chamber 79 Control substrate (sensor substrate)

Claims (6)

An automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body provided in a vehicle,
A drive source provided on either the vehicle body or the opening / closing body;
A case attached to the drive source;
A speed reduction mechanism housed in the case, comprising: a worm provided integrally with a rotating shaft to which the power of the drive source is transmitted; and a worm wheel meshing with the worm and rotatably supported by the case;
A first rotating body that rotates integrally with the worm wheel; and a second rotating body that is detachably disposed in the axial direction with respect to the first rotating body, the first rotating body and the second rotating body, A clutch mechanism housed in the case;
A transmission member provided so as to be rotatable integrally with the second rotating body; and rotatably supported by the case and rotatably about an axis parallel to the axis of the transmission member. A transmission member that is coupled so as to be capable of transmission, and a transmission mechanism that is accommodated in the case;
A drive rotator provided so as to be integrally rotatable with the transmitted member;
An automatic opening and closing device for a vehicle, comprising: an operating member that transmits power of the driving rotating body to the opening and closing body.   The automatic opening / closing device for a vehicle according to claim 1, wherein the transmission mechanism transmits the rotational drive of the transmission member at a reduced speed to the transmitted member.   The automatic opening / closing device for a vehicle according to claim 2, wherein the worm wheel is integrally provided on an outer peripheral portion of the first rotating body.   4. The automatic opening / closing apparatus for a vehicle according to claim 3, wherein the clutch mechanism is an electromagnetic clutch that connects the first rotating body and the second rotating body by a magnetic force, and the second rotation of the first rotating body. A clutch coil that generates the magnetic force is disposed on the opposite side to the body in the axial direction, and the transmission member is disposed on the opposite side of the second rotating body in the axial direction from the first rotating body. An automatic opening and closing device for a vehicle.   5. The automatic opening and closing device for a vehicle according to claim 1, wherein an annular recess is formed in the transmitted member on a side facing the drive rotating body, and the output shaft is disposed in the recess. A magnet that rotates integrally with the magnet is disposed, and a sensor board that extends between the transmitted member and the driving rotating body and has a sensor facing the magnet is accommodated in the case. An automatic opening and closing device for a vehicle.   The automatic opening / closing apparatus for a vehicle according to any one of claims 1 to 5, wherein one end of the operating member is wound around the drive rotating body and the other end is connected to the other of the vehicle body or the opening / closing body. In the case, it is located in a side of the drive rotating body and is rotatable around an axis parallel to the output shaft and is wound around in the case. An automatic opening and closing device for a vehicle, characterized in that a tensioner mechanism including a pulley and a biasing means for biasing the pulley to apply a predetermined tension to the cable body is accommodated.

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