JP2008297765A - Drive unit of vehicular opening/closing body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drive unit which achieves manufacturing cost reduction by simplifying the structure thereof, prevention of an abnormal sound at the time of activation thereof, and compact structure. <P>SOLUTION: According to the structure of the drive unit, by driving a sector gear 33 to rotate by an electric motor 31, a rod 71 is reciprocatively moved with respect to a tail gate 11, and the reciprocative motion of the rod 71 triggers rocking of a link arm 72, followed by driving of the tail gate 11 for opening/closing by an output arm 73 linked to the link arm 72. Thus, a slider, a roller, and a guide member which have been conventionally used are dispensed with, which leads to simplification of the structure of the drive unit 20, reduction in manufacturing cost, elimination of an abnormal sound attributable to rolling etc. of the roller, and further elimination of driving loss by the roller, and the electric motor 31 of a smaller capacity can be used to reduce the size of the drive unit 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drive device for a vehicle opening / closing body that opens and closes an up / down opening / closing body provided on a vehicle body.

  Conventionally, the rear end of the body of a wagon car or one-box car has been provided with a tailgate (opening / closing body) of an upper hinge lower opening type (vertical opening / closing type) that swings in the vertical direction of the vehicle body. By moving the tailgate to the fully open position, a relatively large opening is formed at the rear end of the vehicle body so that loading and unloading operations of various sizes of luggage can be easily performed.

  Since the tailgate opens and closes a large opening at the rear end of the vehicle body, it is not only large in size but also heavy, and it must be swung in the vertical direction of the vehicle body. It is not easy to manually perform the opening / closing operation. Therefore, in order to facilitate the opening and closing operation of the tailgate, a vehicle opening / closing body driving device using an electric motor that is driven to rotate in the forward or reverse direction is mounted on the vehicle body, and this driving device is driven. Therefore, vehicles have been developed that can automatically open and close the tailgate.

  As such a drive device for a vehicle opening / closing body, for example, the one described in Patent Document 1 is known. The driving device for a vehicle opening / closing body described in Patent Document 1 includes a crank gear that is rotationally driven by a drive motor, one end rotatably connected to an eccentric position of the crank gear, and the other end having a plurality of rotating members. A crank arm that is pivotally connected to a slider that slides through a guide member via a roller, and a door arm that is pivotally connected at one end to the slider and pivotally connected to the rear door at the other end. And.

Then, when the drive motor is driven to rotate and the crank gear is rotated with the rear door being in the fully closed position, the crank arm is moved with the rotation of the crank gear, so that the slider moves within the guide member. Moving. As a result, the door arm projects from the guide portion toward the rear door, and the rear door can be moved toward the fully open position.
JP2003-104060A (FIG. 2)

  However, according to the drive device for a vehicle opening / closing body described in Patent Document 1 described above, the slider reciprocates in the guide member via a plurality of rollers, so the number of parts is large. In addition, there is a problem that the manufacturing cost is increased, for example, it is necessary to accurately manufacture each component in order to smoothly perform the reciprocating motion of the slider in the guide member. Furthermore, when the driving device is operated, noise is generated due to rolling of a plurality of rollers from between the guide member and the slider, or driving due to frictional resistance between the plurality of rollers and the guide member. Problems such as the need to use a large drive motor to eliminate the loss may occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a drive device for a vehicle opening / closing body capable of realizing a reduction in manufacturing cost by simplifying the structure of the drive device, suppression of noise generation during operation of the drive device, and downsizing of the drive device. There is.

  A drive device for a vehicle opening / closing body according to the present invention is a drive device for a vehicle opening / closing body that opens and closes an opening / closing type opening / closing body that swings about a first axis provided on the vehicle body. A drive source mounted and rotationally driven in the forward or reverse direction, an output member to which the rotational drive of the drive source is transmitted, one end between the drive source and the opening / closing body and the first of the vehicle body; A link arm is rotatably connected to a second shaft provided below one axis, and the other end is swingably moved around the second shaft, and one end is provided on the other end of the link arm. An output arm that is pivotally connected to the third shaft and has the other end pivotally connected to a fourth shaft that is spaced apart from the first shaft of the opening and closing body, and one end that is the output member. And the other end of the link arm so as to swing the link arm. Arm pivotally connected to the predetermined position, characterized in that it comprises a rod which is moved back and forth toward the opening and closing member by the driving of the output member.

  The drive device for a vehicle opening / closing body according to the present invention is characterized in that the other end of the rod is rotatably connected to the third shaft.

  In the vehicle opening / closing body drive device according to the present invention, the other end of the link arm extends above the second shaft, and the link arm swings on the upper side of the second shaft. It is characterized by.

  In the vehicle opening / closing body driving apparatus according to the present invention, the second shaft is provided outside the vehicle body, and the other end of the rod is passed through a through-hole formed in the vehicle body so that the link is formed outside the vehicle body. It is characterized in that it is pivotably connected to an arm.

  In the vehicle opening / closing body driving device according to the present invention, the output member is formed by a rotating body that is rotationally driven in accordance with the rotational driving of the driving source.

  The drive device for a vehicle opening / closing body according to the present invention is characterized in that the other end of the rod is rotatably connected to the link arm via a spherical plain bearing.

  The drive device for a vehicle opening / closing body according to the present invention is characterized in that at least one of one end and the other end of the rod is rotatably connected to the output member and the link arm via a spherical bearing. To do.

  According to the present invention, when the output member is driven by the drive source, the rod moves forward and backward toward the opening / closing body, and the link arm swings and moves by the forward and backward movement of the rod, and the output arm connected to the link arm is Open and close the opening / closing body. Therefore, the conventional slider, roller, and guide member can be eliminated, the structure of the drive device can be simplified, and the manufacturing cost can be reduced. Further, since the conventional roller can be eliminated, it is possible to improve the quietness of the drive device by eliminating the generation of abnormal noise caused by roller rolling or the like. Furthermore, since the driving loss due to the conventional roller can be eliminated and the load on the driving source can be reduced, a smaller driving source can be adopted as compared with the conventional one, and the driving device can be made compact.

  According to the present invention, since the other end of the rod is rotatably connected to the third shaft, the shape of the link arm can be simplified and the number of shafts forming the connecting portion can be reduced. In addition, the drive device can be made more compact, and the manufacturing cost can be further reduced.

  According to the present invention, the other end of the link arm is extended above the second axis, and the link arm is swung above the second axis. The fourth axis, to which the other end of the output arm is connected, can be brought close to the first axis in proximity to the first axis. Therefore, the opening / closing angle range of the opening / closing body with respect to the swinging motion of the link arm can be increased, and the drive device can be further downsized.

  According to the present invention, the second shaft is provided outside the vehicle body, and the other end of the rod is passed through the through-hole formed in the vehicle body and is rotatably connected to the link arm outside the vehicle body. And the first shaft can be arranged close to each other, and the drive device can be further compacted.

  According to the present invention, since the output member is formed by the rotating body that is rotationally driven in accordance with the rotational drive of the drive source, an increase in the length of the output member in the direction of the opening / closing body is suppressed, and the drive device is further compact. Can be

  According to the present invention, since the other end of the rod is rotatably connected to the link arm via the spherical plain bearing, the three-dimensional motion of the rod can be efficiently converted into the reciprocating motion of the link arm. it can.

  According to the present invention, at least one of the one end and the other end of the rod is rotatably connected to the output member and the link arm via the spherical bearing, so that the driving force of the output member can be transmitted in the middle of the transmission path. It is possible to reliably transmit to the link arm without driving loss.

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

  1 is a side view showing a rear end portion of a vehicle body on which a drive device for a vehicle opening / closing body according to the present invention is mounted, FIG. 2 is a partially enlarged view showing the periphery of the drive device, and FIG. 3 is a drive device. FIG. 4 is an enlarged cross-sectional view of the pillow ball joint, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 3, and FIG. FIG. 7 is a partially enlarged view showing a state in which the opening / closing body has moved from the state shown in FIG. 2 to the half-open position, and FIG. 8 shows a state in which the opening / closing body has moved from the state shown in FIG. Each of the partial enlarged views is shown.

  As shown in FIG. 1, a tail gate (opening / closing body) 11 is provided at the rear end of the vehicle body 10. The tailgate 11 is attached to the vehicle body 10 on one end side via a hinge shaft (first shaft) 12 provided on the rear end side of the roof portion 10a of the vehicle body 10, and is in a fully closed position around the hinge shaft 12. It can swing up and down in the range of about 80 degrees (deg) between the fully open position. That is, the tailgate 11 is an upper hinge lower opening type (vertical opening and closing type).

  An electromagnetic lock mechanism 13 that locks the tailgate 11 in a closed state is provided between the vehicle body 10 and the other end side (the lower side in the figure) of the tailgate 11. The lock is released by opening an opening / closing switch (not shown) provided in the above.

  Further, a gas stay 14 as an operation force assisting device is provided between the vehicle body 10 and the tailgate 11. The gas stay 14 applies an assisting force having a predetermined magnitude in the direction of the fully opened position of the tailgate 11, and reduces the operating force when the tailgate 11 is manually opened. The gas stay 14 is arbitrarily provided for each vehicle type depending on the size and weight of the tailgate 11.

  A vehicle opening / closing body driving device 20 (hereinafter simply referred to as a driving device) is mounted on the inner side of the roof portion 10a of the vehicle body 10 in the vicinity of the hinge shaft 12 in the horizontal direction. The drive device 20 is driven by an operator opening or closing an open / close switch (not shown), and cooperates with the gas stay 14 to open and close the tailgate 11.

  As shown in FIGS. 2 to 5, the drive device 20 includes a motor unit 30 and a link mechanism unit 70, and the motor unit 30 constituting the drive device 20 is substantially horizontal with respect to the vehicle body 10. In this way, the vehicle body 10 is mounted via a mounting bracket (not shown).

  The motor unit 30 includes an electric motor 31 as a drive source, a case 32 that houses the speed reduction mechanism 34 and the electromagnetic clutch 40, and an output member that is rotatably attached to the case 32 and transmits the rotational drive of the electric motor 31. And a sector gear 33 as a (rotating body).

  The electric motor 31 includes a permanent magnet fixed in a substantially bottomed cylindrical motor case 31a, and an armature shaft (not shown) on which a coil is wound and provided rotatably inside the permanent magnet. And have. The electric motor 31 is a so-called brushed DC motor provided with a brush that is in sliding contact with a commutator (not shown) provided coaxially with the armature shaft. Then, by supplying a predetermined current to the electric motor 31 from a controller (not shown), the armature shaft rotates in the forward direction or the reverse direction at a predetermined speed, and the rotation is transmitted to the speed reduction mechanism 34 inside the case 32. It is designed to be output.

  Inside the case 32 is housed a speed reduction mechanism 34 that decelerates the rotation of the armature shaft. As shown in FIG. 5, the speed reduction mechanism 34 includes a worm gear 34a provided integrally with the armature shaft, and a worm wheel 34b meshing with the worm gear 34a. The rotation of the armature shaft is decelerated by the speed reduction mechanism 34, and the decelerated and increased torque output is output to the output shaft 35 disposed at the rotation center of the worm wheel 34b.

  In addition to the speed reduction mechanism 34, an electromagnetic clutch 40 as a power interrupt mechanism is accommodated in the case 32 coaxially with the output shaft 35. The rotation of the worm wheel 34 b is transmitted to the output shaft 35 via the electromagnetic clutch 40. It is to be transmitted. That is, power transmission between the worm wheel 34 b and the output shaft 35 can be interrupted by the electromagnetic clutch 40.

  The electromagnetic clutch 40 is a so-called friction type clutch, and includes a clutch rotor 41 and an armature 42 that can make frictional contact with each other. The opposing surfaces in the axial direction of the clutch rotor 41 and the armature 42 are friction surfaces, and these friction surfaces oppose each other through a slight gap.

  The clutch rotor 41 is formed in an annular shape having a substantially U-shaped cross section by a magnetic material such as a steel material, and is attached to the output shaft 35 via a bearing 43 so as to be relatively rotatable, and a worm via a rotor ring 44. It is connected to the wheel 34b and rotates together with the worm wheel 34b. On the other hand, the armature 42 is formed in a disk shape from a magnetic material such as steel, and is disposed between the worm wheel 34 b and the clutch rotor 41 and inside the rotor ring 44.

  A through hole is formed at the center of the armature 42, and a disk-shaped connecting member 45 is disposed inside the through hole. An inner peripheral side of the connecting member 45 is fixed to the output shaft 35, and an armature 42 is coupled to the outer peripheral side of the connecting member 45 via a leaf spring 46. As a result, the armature 42 is connected to the output shaft 35 via the leaf spring 46 and the connecting member 45 so as to be able to transmit power, and is movable in the vertical direction in the figure by elastic deformation of the leaf spring 46.

  A clutch yoke 47 is fixed to the case 32 on the back surface (lower side in the figure) of the clutch rotor 41, and a clutch coil 48 is provided inside the clutch yoke 47. The clutch coil 48 is electrically connected to a controller (not shown). When a current of a predetermined magnitude is supplied from the controller, a magnetic attractive force is generated in the clutch yoke 47 and the armature 42 is attracted to the clutch rotor 41. It has become.

  With such a structure, when a current is supplied to the clutch coil 48, the friction surfaces of the clutch rotor 41 and the armature 42 are brought into frictional contact, the electromagnetic clutch 40 is switched to the power transmission state, and the rotation of the worm wheel 34b is electromagnetic. It is transmitted to the output shaft 35 via the clutch 40. On the other hand, when the supply of current to the clutch coil 48 is stopped, the armature 42 is separated from the clutch rotor 41 by the spring force of the leaf spring 46, and the electromagnetic clutch 40 is switched to the power cut-off state to Transmission of rotation between the wheel 34b and the output shaft 35 is cut off.

  As described above, in the drive device 20, the electromagnetic clutch 40 is provided between the speed reduction mechanism 34 and the output shaft 35, and the tailgate 11 is manually opened and closed by switching the electromagnetic clutch 40 to the power cut-off state. I can do it.

  As shown in FIG. 5, a single pinion type planetary gear mechanism (planetary speed reduction mechanism) 50 is disposed on the side opposite to the electromagnetic clutch 40 side of the output shaft 35 (upper side in the figure). The planetary gear mechanism 50 includes a sun gear (sun gear) 51 fixed to the output shaft 35, three planetary gears (planetary gears) 52 provided rotatably around the sun gear 51, and each planetary gear 52. It comprises a carrier 53 that supports the rotating shaft, and a ring gear (internal gear) 54 that meshes with each planetary gear 52 and is provided on the outer peripheral side of the sun gear 51.

  The ring gear 54 constituting the planetary gear mechanism 50 is fixed to the case 32, whereby the rotation of the output shaft 35 is transmitted from the sun gear 51 as the input element to each planetary gear 52 and is decelerated to serve as the output element. The torque of the carrier 53 is increased and output. However, the planetary speed reduction mechanism provided on the same axis as the output shaft 35 is not limited to a single pinion type planetary gear mechanism, and may be a double pinion type planetary gear mechanism.

  The carrier 53 constituting the planetary gear mechanism 50 is formed in a substantially hollow cylindrical shape, and the output shaft 35 is rotatably passed through the carrier 53 via a synthetic resin bearing 55. An output gear 53a having a predetermined pitch is integrally formed on the outer peripheral surface of the carrier 53, and the gear teeth 33a of the sector gear 33 are meshed with the output gear 53a.

  One end side (the upper side in the figure) of the output shaft 35 is rotatably supported by a plate-like support plate 57 via a bearing 56 made of synthetic resin or the like. The support plate 57 is formed in a substantially stepped bowl shape having a step, and plays a role of surrounding and protecting the output gear 53 a of the carrier 53 in addition to supporting the output shaft 35. The support plate 57 is fixed to the case 32 by a plurality of screws 58 (only one in the drawing).

  On the left side of the planetary gear mechanism 50 in the drawing, a support pin 59 fixed to the rotation center of the sector gear 33 is provided so as to be aligned with the carrier 53 constituting the planetary gear mechanism 50. One end side (upper side in the figure) of the support pin 59 is rotatably supported by a support plate 57 via a bearing 60 made of synthetic resin or the like, and the other end side (lower side in the figure) of the support pin 59 is The support recess 62 of the case 32 enters the support recess 62 through a bearing 61 made of synthetic resin or the like and is supported rotatably.

  The support pin 59 is integrally provided with a substantially sector-shaped sector gear 33 having gear teeth 33a formed on the outer peripheral edge thereof. A ball stud 63 of a spherical bearing as an eccentric shaft is attached to an eccentric position of the sector gear 33, that is, a position near the gear teeth 33a on the radially outer side away from the support pin 59. As shown in FIG. 3, a spherical bearing socket 71a formed at one end (right end in the figure) of the rod 71 is fitted and connected to the ball stud 63, and one end of the rod 71 can be freely rotated. I support it.

  As shown in FIG. 3, the link mechanism unit 70 constituting the drive device 20 has a spherical bearing socket 71 a at one end and a rod 71 having a pillow ball joint 71 b as a spherical sliding bearing at the other end, and a plate shape. The link arm 72 is formed, and the output arm 73 is also formed in a plate shape. The spherical sliding bearing 71b is configured as a so-called pillow ball joint. As shown in FIG. 4, an annular outer ring 71c integrally formed with the rod 71 and a spherical pillow ball 71d having an inner ring, that is, a spherical surface, formed of a steel material. It has. Thus, the three-dimensional movement of the rod 71 is converted into a reciprocating movement of the link arm 72 via the pillow ball joint 71b.

  As shown in FIG. 2, one end (the lower side in the figure) of the link arm 72 is provided below the hinge shaft 12 between the motor unit 30 and the tailgate 11 and outside the vehicle body 10 (outside the vehicle). The fixed shaft (second shaft) 15 is rotatably connected. The other end (upper side in the figure) of the link arm 72 extends above the fixed shaft 15, so that the link arm 72 is located above the fixed shaft 15 around the fixed shaft 15 (the fixed shaft 15). Oscillates at the upper side of the horizontal line.

  A connecting shaft (third shaft) 74 is integrally provided at the other end of the link arm 72, and one end (left side in the figure) of the output arm 73 is rotatably connected to the connecting shaft 74. ing. The other end (right side in the figure) of the output arm 73 is rotatably connected to the bracket shaft 17 of the bracket 16 provided at a position separated from the hinge shaft 12 of the tailgate 11. The bracket shaft 17 is arranged at a position slightly separated from the hinge shaft 12 by a predetermined distance L1 in the state shown in FIG. 2, that is, in the state where the tailgate 11 is in the fully closed position. . Thereby, when the output arm 73 moves in the substantially vertical direction of the tailgate 11, the tailgate 11 moves around the hinge shaft 12, that is, the tailgate 11 is driven to open and close.

  As shown in FIG. 2, the rod 71 is provided so as to pass through a through hole 10 b formed in the vehicle body 10, and the other end is rotatably connected to a connecting shaft 74 outside the vehicle body 10. As a result, the rod 71 is moved forward and backward toward the tailgate 11 by the rotational drive of the sector gear 33, and the link arm 72 is caused to swing.

  Next, the operation of the drive device 20 configured as described above will be described in detail with reference to the drawings.

  When the operator opens the open / close switch (not shown) in the state shown in FIG. 2, that is, in a state where the tailgate 11 is in the fully closed position, first, the lock mechanism 13 of the tailgate 11 shown in FIG. Locked. Thereafter, a controller (not shown) supplies a predetermined amount of current to the electric motor 31 with the unlocking of the lock mechanism 13 as a trigger. In conjunction with this, a predetermined amount of current is also supplied to the electromagnetic clutch 40. As a result, the electric motor 31 is rotated in the positive direction with a constant output, and the electromagnetic clutch 40 is in the power transmission state.

When the electric motor 31 is rotationally driven, the rotational drive is transmitted to the sector gear 33 through the following steps [1] to [4].
[1] An armature shaft (not shown) is rotationally driven, and this rotation is decelerated (first deceleration) by the worm gear 34a and the worm wheel 34b (deceleration mechanism 34).
[2] Depending on the power transmission state of the electromagnetic clutch 40, the rotation decelerated by the speed reduction mechanism 34 is transmitted to the output shaft 35 via the worm wheel 34b.
[3] The rotation of the output shaft 35 is transmitted and decelerated in the order of the sun gear 51, the planetary gear 52, and the carrier 53 (second deceleration).
[4] As the planetary gear mechanism 50 rotates, the sector gear 33 that meshes with the output gear 53 a of the carrier 53 is driven to rotate.

  The sector gear 33 receives the rotational drive with high torque through the first reduction by the reduction mechanism 34 and the second reduction by the planetary gear mechanism 50, whereby the sector gear 33 is rotated with high output torque, The stud 63 moves in the direction of arrow a in FIG.

  Here, at the beginning of the opening of the tailgate 11, the assisting force of the gas stay 14 acts in the direction of the hinge shaft 12 as shown in FIG. 11 is in a state of hardly acting in the direction of the fully opened position. Therefore, in order to move the tailgate 11 from the fully closed position to the fully open position, it is necessary to generate a relatively large output in the driving device 20.

  When the tailgate 11 is in the fully closed position, as shown in FIG. 3, the perpendicular distance between the center of the support pin 59 fixed to the center of the sector gear 33 and the rod 71 depends on the rotational drive of the sector gear 33. It gradually becomes longer. Therefore, when the tailgate 11 is in the fully closed position, the distance between the center of the support pin 59 and the rod 71 becomes the shortest, and the sector gear 33 can apply a large driving force to the rod 71. Yes. As a result, the driving device 20 can smoothly open the tailgate 11 from the fully closed position.

  By continuously rotating the sector gear 33, as shown in FIG. 6, the ball stud 63, the connecting shaft 74, and the bracket shaft 17 change from a circle mark to a triangle mark through a triangle mark. As a result, the tailgate 11 is centered on the hinge shaft 12, and is opened from the fully closed position shown in FIG. 2 at an angle of about 40 degrees shown in FIG. 7, and from the fully closed position shown in FIG. It moves to the fully open position opened at an angle of about 80 degrees as shown in FIG.

  As shown in FIG. 6, the trajectory TL <b> 1 of the ball stud 63 draws a substantially horizontal trajectory by mounting the motor unit 30 substantially horizontally with respect to the vehicle body 10. Further, the trajectory TL2 of the connecting shaft 74 draws an arc-shaped trajectory that protrudes upward as the link arm 72 swings about the fixed shaft 15 on the upper side. Further, the locus TL3 of the bracket shaft 17 has an arc shape protruding rightward in the figure as the tailgate 11 (see FIG. 1) swings from the lower side to the upper side around the hinge shaft 12. Draw a trajectory. Here, the locus TL3 of the bracket shaft 17 draws a locus longer than the locus TL1 of the ball stud 63 (TL1 <TL3), and is set so as to increase the angle change of the bracket shaft 17 with respect to the movement amount of the locus TL2. Therefore, the tailgate 11 can be opened and closed within a sufficient opening / closing angle range with respect to the swinging motion of the link arm 72. As a setting for making the trajectory TL3 longer than the trajectory TL1 and increasing the angle change of the bracket shaft 17 with respect to the movement amount of the trajectory TL2, the hinge shaft 12 of the tailgate 11 to the vehicle body 10 is a fixed fulcrum. Then, it is possible to appropriately change the position by adjusting the mounting position of the fixed shaft 15 to the vehicle body 10, the mounting position of the bracket shaft 17 to the tailgate 11, and the position of the connecting shaft 74.

  When the tailgate 11 is moved from the fully open position to the fully closed position, contrary to the above, the electric motor 31 is rotationally driven in the reverse direction, that is, the sector gear 33 is rotationally driven in the reverse direction. 5 Move in the direction of arrow b. Then, the ball stud 63, the connecting shaft 74, and the bracket shaft 17 respectively change from the square mark on the locus shown in FIG. 6 to the circle mark through the triangle mark, and then continue to drive the electric motor 31 further. By doing so, the lock mechanism 13 is locked. At this time, since the distance of the perpendicular line connecting the center of the support pin 59 and the rod 71 is the shortest (see FIG. 3) as described above, a large driving force is applied to the rod 71 and the lock mechanism 13 is applied. Can be easily locked.

  According to the drive apparatus 20 according to the first embodiment configured as described above, the rod 71 moves forward and backward toward the tailgate 11 by rotationally driving the sector gear 33 by the electric motor 31, and the rod 71 advances and retracts. As a result, the link arm 72 swings and the output arm 73 connected to the link arm 72 opens and closes the tailgate 11.

  Therefore, the conventional slider, roller, and guide member can be eliminated, the structure of the drive device 20 can be simplified, and the manufacturing cost can be reduced. In addition, since the conventional roller can be eliminated, it is possible to improve the quietness of the drive device 20 by eliminating the generation of abnormal noise due to roller rolling or the like. Furthermore, since the driving loss due to the conventional roller can be eliminated and the load on the electric motor 31 can be reduced, a smaller electric motor can be adopted as compared with the conventional one, and the drive device 20 can be made compact.

  Further, according to the driving device 20 according to the first embodiment, the other end of the rod 71 is rotatably connected to the connecting shaft 74, so that the other end of the rod 71 is inserted in the middle of the link arm 72. The shape of the link arm 72 can be simplified, for example, it is not necessary to form a connecting shaft for connecting, and the number of shafts forming the connecting portion can be reduced. Therefore, the drive device 20 can be made more compact, and the manufacturing cost can be further reduced.

  Furthermore, according to the drive device 20 according to the first embodiment, the other end of the link arm 72 is extended above the fixed shaft 15 so that the link arm 72 swings on the upper side of the fixed shaft 15. Therefore, the output arm 73 connected to the link arm 72 can be brought close to the hinge shaft 12, and the bracket shaft 17 connected to the other end of the output arm 73 can be brought close to the hinge shaft 12. Therefore, the opening / closing angle range of the tailgate 11 with respect to the swinging motion of the link arm 72 can be increased, and the drive device 20 can be further downsized.

  In addition, according to the driving device 20 according to the first embodiment, the fixed shaft 15 is provided outside the vehicle body 10, and the other end of the rod 71 is passed through the through-hole 10 b formed in the vehicle body 10. Since it is rotatably connected to the link arm 72 outside, the electric motor 31 and the hinge shaft 12 can be arranged close to each other to further reduce the size of the drive device 20. Furthermore, since it can suppress that the link mechanism part 70 which comprises the drive device 20 is exposed to the vehicle inside of the vehicle body 10, carrying in / out operations, such as a load, can be performed easily.

  Further, according to the driving device 20 according to the first embodiment, the sector gear 33 is rotationally driven in accordance with the rotational driving of the electric motor 31, and therefore, compared with an output member such as a rack and pinion type. An increase in the length dimension in the direction of the tailgate 11 including the movable range space can be suppressed, and the drive device 20 can be further downsized.

  Furthermore, according to the driving device 20 according to the first embodiment, one end of the rod 71 is rotatably connected to the connecting shaft 74 of the link arm 72 via the pillow ball joint 71b. Therefore, it is possible to efficiently convert a simple operation into a reciprocating operation of the link arm 72.

  Further, according to the driving device 20 according to the first embodiment, the other end of the rod 71 is rotatably connected to the ball stud 63 of the sector gear 33 via the socket 71a, so that the driving force of the sector gear 33 is transmitted. Transmission to the link arm 72 can be ensured without loss of driving in the middle of the path.

  Next, a driving device for a vehicle opening / closing body according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 9 is a partially enlarged view showing the periphery of the driving device according to the second embodiment in an enlarged manner, and FIG. 10 is a perspective view of the driving device (fully closed position) of FIG. Note that members having the same functions as those of the driving device 20 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIGS. 9 and 10, the driving device 80 includes a link mechanism 90, and as the rod 71 of the driving device 20 described above, a first rod portion 95 a having a socket 71 a formed at one end and a link at the other end. It has the 2nd rod part 95b connected with the connection shaft 74 of the arm 72 rotatably, and the bearing 95c which connects the 1st rod part 95a and the 2nd rod part 95b rotatably. Here, the bearing 95c between the other end of the first rod portion 95a and one end of the second rod portion 95b is a relative bending operation in the vertical direction of the first rod portion 95a and the second rod portion 95b in the drawing. The first rod portion 95a is allowed to swing in the front direction in the figure with respect to the second rod portion 95b.

  According to the drive device 80 according to the second embodiment configured as described above, the conventional slider, roller, and guide member can be eliminated, the structure of the drive device 80 can be simplified, and the manufacturing cost can be reduced. it can. Further, since the conventional roller can be eliminated, it is possible to improve the quietness of the driving device 80 by eliminating the generation of abnormal noise due to the rolling of the roller.

  Further, according to the driving device 80 according to the second embodiment, the rod 71 is configured by rotatably connecting the first rod portion 95a and the second rod portion 95b by the bearing 95c. The force can be reliably transmitted to the link arm 72 without a drive loss in the middle of the transmission path.

  Next, a drive device for a vehicle opening / closing body according to a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 11 is a partially enlarged view showing the periphery of the driving device according to the third embodiment in an enlarged manner. Note that members having the same functions as those of the driving devices 20 and 80 according to the first and second embodiments described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 11, the drive device 100 includes a link mechanism portion 110 instead of the link mechanism portions 70 and 90 of the drive devices 20 and 80 described above, and the motor portion 30 with respect to the vehicle body 10 on the tailgate 11 side. It is designed to be mounted at a predetermined angle.

  One end of the link arm 72 constituting the link mechanism 110 is rotatably connected to a fixed shaft 15 provided on the inner side of the vehicle, and the other end of the link arm 72 swings on the lower side of the fixed shaft 15. It comes to exercise. A mounting bracket 111 is integrally formed at a predetermined position (near the fixed shaft 15) between one end and the other end of the link arm 72. The mounting bracket 111 includes a ball stud 112 (see FIG. Middle broken line) is attached. A spherical bearing socket 113 provided at the other end of the rod 71 is fitted to the ball stud 112 and is rotatably connected. The “predetermined portion of the link arm 72” here refers to an arbitrary position excluding the portion of the fixed shaft 15 of the link arm 72, that is, an arbitrary position at which the link arm 72 can swing by movement of the rod 71. That's it.

  According to the drive device 100 according to the third embodiment configured as described above, the conventional slider, roller, and guide member can be eliminated, the structure of the drive device 100 can be simplified, and the manufacturing cost can be reduced. it can. In addition, since the conventional roller can be eliminated, it is possible to improve the quietness of the driving device 100 by eliminating the generation of abnormal noise due to roller rolling or the like. Furthermore, since the driving loss due to the conventional roller can be eliminated and the load on the electric motor 31 can be reduced, a smaller electric motor can be adopted as compared with the conventional one, and the drive device 100 can be made compact.

  Moreover, according to the drive device 100 according to the third embodiment, the sector gear 33 is employed as the output member, so that the drive device 100 can be further downsized.

  Furthermore, according to the driving device 100 according to the third embodiment, both ends of the rod 71 are rotatably connected to the ball stud 63 of the sector gear 33 and the ball stud 112 of the link arm 72 via sockets 71a and 113. Therefore, the driving force of the sector gear 33 can be reliably transmitted to the link arm 72 without a driving loss in the middle of the transmission path.

  Moreover, according to the drive device 100 according to the third embodiment, since the link mechanism unit 110 is configured to be disposed inside the vehicle body 10, the link mechanism unit 110 is reliably protected from rainwater, dust, and the like. be able to.

  Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, in each of the above-described embodiments, the upper and lower opening / closing type tailgate 11 provided at the rear end of the vehicle body 10 is shown as the opening / closing body. However, the present invention is not limited to this, for example, a sedan car or the like The present invention can also be applied to other upper and lower opening / closing type opening / closing bodies such as a trunk lid provided on the vehicle body.

  In each of the above embodiments, a sector gear (rotating body) 33 that meshes with the carrier 53 of the planetary gear mechanism 50 is used as an output member to which the rotational drive of the driving source is transmitted. Not limited to this, a rack that meshes with the carrier 53 and moves in the horizontal direction toward the tailgate 11 can be used, and a so-called rack and pinion type can also be adopted. In this case, the carrier 53 functions as a pinion.

It is a side view which shows the rear-end part of the vehicle body by which the drive device of the vehicle opening / closing body which concerns on this invention was mounted. It is the elements on larger scale which expand and show the drive device periphery. It is the perspective view which looked at the drive device (fully closed position) from diagonally upward. It is an expanded sectional view of a pillow ball joint. It is sectional drawing which follows the AA line of FIG. It is operation | movement explanatory drawing explaining the locus | trajectory of an axis | shaft. It is the elements on larger scale which show the state which the opening-and-closing body moved to the half-open position from the state shown in FIG. It is the elements on larger scale which show the state which the opening-and-closing body moved to the full open position from the state shown in FIG. It is the elements on larger scale which expand and show the drive device periphery concerning a 2nd embodiment. It is the perspective view which looked at the drive device (fully closed position) of FIG. 9 from diagonally upward. It is the elements on larger scale which expand and show the drive device periphery concerning a 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Car body 10a Roof part 10b Through-hole 11 Tail gate (opening-closing body)
12 Hinge axis (first axis)
13 Locking mechanism 14 Gas stay 15 Fixed shaft (second shaft)
16 Bracket 17 Bracket axis (4th axis)
20 Drive device (drive device for vehicle opening / closing body)
30 Motor part 31 Electric motor (drive source)
31a Motor case 32 Case 33 Sector gear (output member, rotating body)
33a gear teeth 34 speed reduction mechanism 34a worm gear 34b worm wheel 35 output shaft 40 electromagnetic clutch 41 clutch rotor 42 armature 43 bearing 44 rotor ring 45 connecting member 46 leaf spring 47 clutch yoke 48 clutch coil 50 planetary gear mechanism 51 sun gear 52 planetary gear 53 carrier 53a Output gear 54 Ring gear 55, 56 Bearing 57 Support plate 58 Screw 59 Support pin 60, 61 Bearing 62 Support recess 63 Ball stud (spherical bearing)
70 Link mechanism 71 Rod 71a Socket (spherical bearing)
71b Pillow ball joint (Spherical plain bearing)
71c Outer ring 71d Pillow ball 72 Link arm 73 Output arm 74 Connecting shaft (third shaft)
80 Drive device 90 Link mechanism portion 95a First rod portion (rod)
95b Second rod part (rod)
95c Bearing 100 Driving device 110 Link mechanism 111 Mounting bracket 112 Ball stud (spherical bearing)
113 Socket (spherical bearing)

Claims (7)

A drive device for a vehicle opening / closing body that opens and closes a vertically opening / closing type opening / closing body that swings about a first axis provided in a vehicle body,
A drive source mounted on the vehicle body and driven to rotate in the forward or reverse direction;
An output member to which the rotational drive of the drive source is transmitted;
One end is rotatably connected to a second shaft provided between the drive source and the opening / closing body and below the first shaft of the vehicle body, and the other end swings around the second shaft. A link arm that is in motion,
One end is rotatably connected to a third shaft provided at the other end of the link arm, and the other end is rotatably connected to a fourth shaft provided away from the first shaft of the opening / closing body. An output arm,
One end is rotatably connected to the output member, and the other end is rotatably connected to a predetermined portion of the link arm so as to swing the link arm. A drive device for a vehicle opening / closing body, comprising: a rod that moves forward and backward.   2. The drive device for a vehicle opening / closing body according to claim 1, wherein the other end of the rod is rotatably connected to the third shaft.   The drive device for a vehicle opening / closing body according to claim 1 or 2, wherein the other end of the link arm extends above the second shaft, and the link arm swings on the upper side of the second shaft. A drive device for an opening / closing body for a vehicle, characterized in that it is configured as described above.   The drive device for a vehicle opening / closing body according to any one of claims 1 to 3, wherein the second shaft is provided outside the vehicle body, and a through hole formed in the vehicle body at the other end of the rod. A drive device for a vehicle opening / closing body, wherein the drive device is pivotally connected to the link arm so as to be rotatable outside the vehicle body.   5. The vehicular opening / closing body drive device according to claim 1, wherein the output member is formed of a rotating body that is rotationally driven in accordance with the rotational driving of the driving source. Opening and closing body drive device.   The drive device for a vehicle opening / closing body according to any one of claims 1 to 5, wherein the other end of the rod is rotatably connected to the link arm via a spherical plain bearing. Drive device for vehicle opening / closing body.   The drive device for a vehicle opening / closing body according to any one of claims 1 to 6, wherein at least one of one end and the other end of the rod is connected to the output member and the link arm via a spherical bearing. A drive device for a vehicle opening / closing body, which is pivotably connected.

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