JP2006161467A - Automatic closing and opening device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost of manufacturing an automatic closing and opening device for a vehicle by facilitating control of dimensional accuracy and assembling accuracy of an arm member and a guide member. <P>SOLUTION: The tip of a drive rod 41 driven by an electric motor is guided to an arc-shaped channel of movement which is about the axis of rotation of a hinge by the inner guide surface 52b and the outer guide surface 53b of a bracket 51 fixed to the vehicle. On the other hand, an arm member 42 fixed to a back door is formed in the form of an arc corresponding with the channel of movement of the tip of the drive rod 41. Then a slot 63, which is extended along the direction perpendicular to each of the guide surfaces 52b, 53b, is formed at the tip of the arm member 42. A connecting pin 45 attached to the tip of the drive rod 41 is inserted to the slot 63. Because of this, a displacement absorbing part 62 is provided between the arm member 42 and the drive rod 41. The displacement absorbing part absorbs a displacement from the tip of the drive rod 41 in the direction perpendicular to the guide surfaces 52b, 53b of the arm member 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body mounted on a vehicle body via a hinge.

  Vehicles such as automobiles are provided with opening / closing bodies such as doors for getting on and off and trunk lids everywhere. For example, a back door is provided at the rear end of a vehicle body such as a wagon car or a one-box car so that loading and unloading of luggage from the rear of the vehicle can be easily performed.

  As such an opening / closing body, a hinge type mounted on the vehicle body via a hinge is often seen. In this case, the opening / closing body opens and closes by rotating around the rotation center axis of the hinge. Therefore, in the case of a back door that is often opened at the rear end of the vehicle roof part and opened below the upper hinge, the back door will be greatly raised upward when opened. Is not easy. Therefore, a vehicle has been developed in which an automatic opening / closing device is mounted on the vehicle body, and the back door is automatically opened / closed by the automatic opening / closing device. According to this automatic opening / closing device, since the back door can be remotely operated from the driver's seat, there are many requests for mounting the automatic opening / closing device for this convenience.

  As such an automatic opening / closing device, for example, as disclosed in Patent Document 1, an actuator unit in which an actuator unit using an electric motor or the like as a drive source is arranged in a roof of a vehicle is known. In this case, the actuator unit is provided with a drive rod that is driven by an electric motor and moves forward and backward toward the back door, and an arm member that is curved in an arc shape around the rotation center axis of the hinge is fixed to the back door. . The tip of the drive rod is pivotally connected to the tip of the arm member by a connecting pin. When the drive rod moves forward and backward, the forward and backward movement is transmitted to the back door via the arm member, and the back door automatically opens and closes. To do.

On the other hand, as shown in Patent Document 2, for example, a guide member having an arcuate guide surface that is curved around the rotation center axis of the hinge is fixed to the vehicle body, and the arm member is fixed to the back door by the guide member. There is known a technique that guides the travel route of the vehicle. According to this technique, since the bending load applied to the arm member is also supported by the guide member, the bending load applied to the arm member can be reduced.
Japanese Utility Model Publication No. 6-71852 JP-A-56-25063

  However, in the automatic opening and closing device disclosed in Patent Document 1, the arm member is formed thick so as to have rigidity capable of withstanding the bending load due to the driving force of the driving rod and the weight of the back door, and the arm member is attached to the back door. It is necessary to increase the fixing strength, which hinders the reduction in size and weight of the automatic switchgear.

  On the other hand, a method of reducing the bending load applied to the arm member by providing a guide member as shown in Patent Document 2 in such an automatic opening and closing device is conceivable. However, in this case, in order to smoothly guide the arm member by the guide member, the curvature of the arm member and the curvature of the guide surface of the guide member are made to coincide with each other with high accuracy and the guide member and the arm member are attached to the vehicle body or It is necessary to assemble with high accuracy at a regular position with respect to the back door. Therefore, in order to improve the dimensional accuracy of the guide member and the arm member, the manufacturing process of these members becomes complicated, and the dimensional management becomes complicated. In addition, the manufacturing cost of the automatic opening / closing device has been increased because the assembly process of the guide member to the vehicle body, the assembly process of the arm member to the back door, and the management of the assembly accuracy are complicated.

  On the other hand, a structure in which the arm member is swung in the direction along the guide surface by connecting the arm member to the back door via a hinge is conceivable. However, in this case, it is necessary to newly provide a member such as a hinge between the arm member and the back door, which increases the manufacturing cost of the automatic switchgear due to an increase in the number of parts and the assembly process.

  An object of the present invention is to facilitate management of dimensional accuracy and assembly accuracy of an arm member and a guide member, and to reduce the manufacturing cost of an automatic opening / closing device for a vehicle.

  An automatic opening / closing device for a vehicle according to the present invention is an automatic opening / closing device for a vehicle that automatically opens and closes an opening / closing body mounted on a vehicle body via a hinge, and is driven by a drive source to move forward and backward toward the opening / closing body. A drive member, an arm member having one end pivotably connected to the tip of the drive member, and the other end fixed to the opening / closing body, and an arcuate shape that curves around the rotation center axis of the hinge And a guide member that guides the distal end of the drive member, and a guide member that is fixed to the vehicle body. The drive member includes a displacement absorbing portion that absorbs the displacement of the arm member with respect to the distal end of the drive member And the arm member.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that the arm member is formed in an arc shape that is curved around a rotation center axis of the hinge.

  In the automatic opening and closing device for a vehicle according to the present invention, a long hole extending in a direction perpendicular to the guide surface is formed at one end of the arm member, and a connecting pin inserted into the long hole is formed at a distal end portion of the driving member. The displacement absorbing portion is configured by mounting.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that a roller that rolls on the guide surface is rotatably mounted on a tip portion of the drive member.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that a gap is provided between the arm member and the guide member in a direction perpendicular to the guide surface.

  The automatic opening / closing device for a vehicle according to the present invention is characterized in that a rack that is driven by the driving source and linearly reciprocates is provided, and the driving member formed in a rod shape is swingably connected to the rack.

  According to the present invention, due to a shift of the fixing position of the guide member to the vehicle body, a shift of the fixing position of the arm member to the opening / closing body, a dimensional error of the guide surface of the guide member or the arm member, etc. Even when the movement path of the arm member is displaced with respect to the movement path of the tip, the displacement generated in the connecting portion between the drive member and the arm member is absorbed by the displacement absorbing section. The arm member can be operated smoothly. Therefore, it becomes easy to manage the dimensional accuracy of the guide member and the arm member and the assembly accuracy of these members to the vehicle body, thereby reducing the manufacturing cost of the vehicle automatic opening / closing device.

  Further, according to the present invention, the shift absorbing portion is configured by the connecting pin mounted on the drive member and the long hole formed in the arm member extending in the direction perpendicular to the guide surface. With the absorption part having a simple structure, the manufacturing cost of the vehicle automatic opening / closing device can be further reduced.

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

  FIG. 1 is a side view showing a rear end portion of a vehicle provided with an automatic opening / closing device for a vehicle according to an embodiment of the present invention. A back door as an opening / closing body is provided at a rear end portion of a vehicle body 12 of the vehicle 11. 13 is provided. The back door 13 is attached to the vehicle body 12 via a hinge 14 attached to the roof portion 12a of the vehicle body 12, and a fully closed position indicated by a solid line in the figure centering on the rotation center axis 14a of the hinge 14 and the figure. It can be opened and closed in the vertical direction within a range of about 90 degrees between the fully open position indicated by the one-dot chain line.

  In order to automatically open and close the back door 13, the vehicle 11 is provided with a vehicle automatic opening / closing device 21 (hereinafter referred to as opening / closing device 21). The opening / closing device 21 includes an actuator unit 22 disposed inside the roof portion 12 a of the vehicle body 12 and a link mechanism 23 that connects the actuator unit 22 to the back door 13, and outputs the actuator unit 22 to the link mechanism 23. The back door 13 is automatically opened and closed by being transmitted to the back door 13 via.

  FIG. 2 is a top view showing details of the automatic opening / closing device for a vehicle shown in FIG. 1, and an actuator unit 22 used in the opening / closing device 21 is fixed to a base racket 24 fixed to the vehicle body 12 and the base bracket 24. Drive unit 25.

  The drive unit 25 includes an electric motor 26 as a drive source. The rotation of the electric motor 26 is reduced to a predetermined number of rotations by a speed reducer 27 and output from the output shaft 28. A so-called brushed DC motor is used as the electric motor 26, and its operation control is performed by a control device (not shown). The control device has a function as a so-called microcomputer including a CPU, a memory, and the like, and performs operation control of the electric motor 26 based on a command signal from a back door opening / closing switch (not shown) provided in the vehicle interior.

  The electric motor 26 is not limited to a DC motor with a brush, and other types of electric motors such as a brushless motor may be used.

  The drive unit 25 is provided with a friction type electromagnetic clutch (not shown), and the power transmission path between the electric motor 26 and the output shaft 28 can be intermittently connected by this electromagnetic clutch. The operation control of the electromagnetic clutch is executed by the aforementioned control device, and when the electric motor 26 is operated, the electromagnetic clutch is switched to the power transmission state. On the other hand, when the back door 13 is manually opened and closed, the electromagnetic clutch is switched to the power cut-off state. Thereby, when the back door 13 is manually operated, the back door 13 and the electric motor 26 are disconnected, and the opening / closing operation force is reduced.

  In the illustrated case, a friction type electromagnetic clutch is used. However, the present invention is not limited to this, and other types of clutch mechanisms may be used as long as the power transmission path can be interrupted. Good.

  Reference numeral 29 shown in FIG. 1 is a gas stay for assisting the opening / closing operation when the back door 13 is manually opened / closed. However, in the case where the drive unit 25 is not provided with an electromagnetic clutch, The gas stay 29 may not be provided.

  In order to convert the rotary motion of the output shaft 28 into a linear reciprocating motion, the actuator unit 22 is provided with a rack-and-pinion power conversion mechanism 31. The power conversion mechanism 31 has a guide rail 32 fixed to the base bracket 24 and a rack 33 attached to the guide rail 32. The guide rail 32 has its axial direction directed in the vehicle front-rear direction. The rack 33 has a slide portion 33a, and the slide portion 33a is mounted on the guide rail 32 so as to be movable in the axial direction. Further, rack teeth 33b are provided on one side surface of the rack 33 in the longitudinal direction, and pinions 34 fixed to the output shaft 28 are engaged with the rack teeth 33b. Furthermore, a guide groove 33c extending in the vehicle longitudinal direction is formed in the rack 33, and a guide pin 35 rotatably supported by the base bracket 24 is inserted into the guide groove 33c. Thereby, the rack 33 and the pinion 34 are held at a predetermined interval by the guide pin 35, and when the electric motor 26 is operated, the power of the electric motor 26 is transmitted to the rack 33 via the pinion 34, and the rack 33 is moved in the vehicle front-rear direction. Reciprocates linearly.

  3A is a perspective view of the link mechanism 23 shown in FIG. 2 as viewed from above the vehicle body, and FIG. 3B is a perspective view of the link mechanism 23 shown in FIG. It is. 4 is a cross-sectional view taken along line AA shown in FIG. 2, and FIG. 5 is an enlarged view showing details of the tip of the drive rod shown in FIG.

  As shown in FIGS. 3A and 3B, the link mechanism 23 has a drive rod 41 and an arm member 42 as drive members, and the linear reciprocation of the rack 33 is performed by the drive rod 41 and the arm member 42. It is transmitted to the back door 13 via.

  The drive rod 41 is formed in a rod shape by laminating two thin plate members having a predetermined length dimension, and as shown in FIG. 2, the base end portion is provided on the side of the slide portion 33 a of the rack 33 with a pin member 43. Thus, the vehicle is swingably connected in the vertical direction of the vehicle. As a result, when the electric motor 26 is operated, the drive rod 41 reciprocates in the vehicle longitudinal direction together with the rack 33 while being tilted in the vehicle vertical direction. That is, the drive rod 41 is driven by the electric motor 26 to move forward and backward toward the back door 13.

  As shown in FIG. 4, the arm member 42 is formed in an arc shape that curves around the rotation center axis 14 a of the hinge 14, and a fixing bracket 44 having an attachment hole 44 a is fixed to one end thereof. The fixing bracket 44 is fixed to the back door 13 by a fastening member such as a bolt (not shown) inserted through the mounting hole 44 a, whereby one end of the arm member 42 is fixed to the back door 13. At this time, the fixing position of the fixing bracket 44 to the back door 13 is adjusted so that the center of curvature of the arm member 42 coincides with the rotation center axis 14 a of the hinge 14.

  As shown in FIG. 5, the front end portion of the drive rod 41 is formed in a bifurcated shape having a pair of connecting walls 41a, and the arm member 42 is disposed with a slight gap between the connecting walls 41a. The arm member 42 has a distal end portion (an end portion opposite to the back door) disposed on the inner side of the connecting wall 41a, and is connected to the connecting wall 41a, that is, driven by the connecting pin 45. The rod 41 is rotatably connected to the tip portion. That is, in the opening / closing device 21, the drive rod 41 and the arm member 42 are connected by a both-end support structure.

  With this structure, when the electric motor 26 operates and the drive rod 41 moves forward and backward, the back door 13 is driven in the opening and closing direction via the arm member 42 by the forward and backward movement.

  In the illustrated case, the tip of the drive rod 41 is formed in a bifurcated shape. However, the present invention is not limited to this, and the tip of the arm member 42 is formed in a bifurcated shape having a pair of connecting walls. The drive rod 41 may be disposed and connected inside these connection walls.

  The opening / closing device 21 has a guide bracket 51 as a guide member for guiding the moving path of the tip end portion of the drive rod 41. The guide bracket 51 movably supports the tip end portion of the drive rod 41 to provide an arm member. The bending load applied to 42 is reduced.

  As shown in FIGS. 3A and 3B, the guide bracket 51 has a main bracket 52 as an inner half and a sub bracket 53 as an outer half fixed to the vehicle lower side of the main bracket 52. And is fixed to the vehicle body at a mounting portion provided on the main bracket 52.

  The main bracket 52 is made of sheet metal, and as shown in FIG. 3A, a pair of inner guide walls 52a that are curved in an arc shape are provided at the intermediate portion in the width direction. As shown in FIG. 4, the outer peripheral sides of these inner guide walls 52a are arcuate inner guide surfaces 52b that are curved around the rotation center axis 14a of the hinge 14, and these inner guide surfaces 52b are drive rods. It is arranged on the hinge 14 side with respect to the tip of 41. Further, an inner escape portion 54 is formed between the pair of inner guide walls 52a of the main bracket 52 in order to prevent interference with the drive rod 41, and each inner guide surface 52b is formed as shown in FIG. They are arranged side by side on the inner escape portion 54. The inner escape portion 54 is formed to be recessed toward the hinge 14 with respect to each inner guide surface 52b, and the drive rod 41 can move to the hinge 14 side with respect to the inner guide surface 52b.

  Similarly, the sub bracket 53 is also made of sheet metal, and includes a pair of outer guide walls 53a each curved in an arc shape as shown in FIGS. As shown in FIG. 4, the inner peripheral side of each outer guide wall 53a is an arcuate outer guide surface 53b that curves around the rotation center axis 14a of the hinge 14, and these outer guide surfaces 53b are driven. It faces the corresponding inner guide surface 52b across the tip of the rod 41. Each outer guide surface 53b is concentrically arranged with respect to the corresponding inner guide surface 52b, and a guide hole 55 is formed between the main bracket 52 and the sub bracket 53 by the guide surfaces 52b and 53b. A compartment is formed. Further, the sub bracket 53 is provided with a protrusion 53c located between the outer guide walls 53a and protruding outward from the outer guide wall 53a. The protrusion 53c interferes with the drive rod 41. In order to prevent this, a slit-like outer relief portion 56 is formed. The outer relief portion 56 is formed to extend along the outer guide surface 53b from the end portion of the protrusion 53c on the vehicle front side to a substantially middle portion in the longitudinal direction. It is possible to project from 55 to the outside.

  On the other hand, as shown in FIG. 5, a pair of rollers 61 are provided at both ends of each connecting wall 41 a at the tip of the drive rod 41, and the tip of the drive rod 41 is guided by these rollers 61. It is guided by the bracket 51. These rollers 61 are formed so that the outer diameter is slightly smaller than the distance between the inner guide surface 52b and the outer guide surface 53b, and each roller 61 rotates to the tip of the drive rod 41 by a connecting pin 45 supported by the connecting wall 41a. It is installed freely. And these rollers 61 are arrange | positioned between the corresponding inner side guide surface 52b and the outer side guide surface 53b, as shown in FIG. As a result, the roller 61 rolls on the guide surface while being guided by the inner guide surface 52b and the outer guide surface 53b, whereby the tip of the drive rod 41 is guided by the guide surfaces 52b and 53b and hinged. 14 moves along an arcuate movement path centered on the rotation center axis 14a. A slight clearance is provided between the roller 61 and the guide surfaces 52b and 53b in order to improve the rolling property of the roller 61, but the roller 61 always contacts one side of the guide surfaces 52b and 53b. It is supposed to be.

  Further, as shown in FIG. 4, the arm member 42 is disposed in the guide hole 55 along the inner escape portion 54 or the protruding portion 53 c, and along the guide hole 55 as the drive rod 41 moves forward and backward. It is movable. Further, by providing the inner escape portion 54 or the protruding portion 53c, a gap is provided between the arm member 42 and the guide bracket 51 in a direction perpendicular to the respective guide surfaces 52b and 53b. The member 42 is set so as not to contact the guide bracket 51 in the movement range.

  6 (a) to 6 (c) are explanatory views showing the operating state of the link mechanism when the back door opens, and the operation of the link mechanism 23 will be described below based on FIG. .

As shown in FIG. 6A, when the back door 13 is fully closed, the tip of the drive rod 41 is located on the vehicle front side of the guide hole 55, and almost the entire arm member 42 is accommodated in the guide hole 55. It has become a state. From this state, when the opening side of the back door opening / closing switch (not shown) is operated to start the automatic opening operation, first, the electric motor 26 is activated and the drive rod 41 starts moving to the back door 13 side together with the rack 33. . When the drive rod 41 moves, the tip of the drive rod 41 moves along the inner guide surface 52b as the roller 61 rolls on the inner guide surface 52b. At this time, as shown in FIG. 4, the driving force F ₀ of the driving rod 41 is decomposed into a component force F ₁ directed in the opening direction of the back door 13 and a component force F ₂ directed in the direction perpendicular to the guide surfaces 52b and 53b. is, the component force _{F 2} is supported by the inner guide surface 52b. On the other hand, the arm member 42 is pushed by the component force F ₁ directed in the opening direction of the back door 13 in a direction to rotate around a rotation axis 14a of the hinge 14, thereby the back door 13 is automatically opening operation .

Then, as shown in FIG. 6 (b), when the back door 13 is opened to the predetermined opening degree, converts the direction of the component force F _2, the drive rod 41 the roller 61 is in contact with the outer guide surface 53b is a tip The movement is continued so that the portion follows the outer guide surface 53b. At this time, the drive rod 41 moves along the outer relief portion 56 formed in the sub bracket 53, so that it does not interfere with the guide bracket 51.

  When the drive rod 41 further moves and the back door 13 moves to the fully open position, as shown in FIG. 6C, the electric motor 26 stops and the opening operation of the back door 13 ends. At this time, the drive rod 41 largely moves toward the hinge 14 with respect to the guide hole 55. However, since the guide bracket 51 is formed with an inner relief portion 54 that is recessed toward the hinge 14, the drive rod 41 is It is located inside the inner escape portion 54 and does not interfere with the guide bracket 51.

  As described above, in the opening / closing device 21, the main bracket 52 is provided with the inner escape portion 54 that is recessed toward the hinge 14 with respect to the inner guide surface 52 b, and the sub bracket 53 has a slit-shaped outer side extending along the outer guide surface 53 b. Since the escape portion 56 is formed, the drive rod 41 can be prevented from interfering with the guide bracket 51 even when the drive rod 41 is connected to the arm member 42 by a both-end support structure. Therefore, it is possible to make the drive rod 41 and the arm member 42 narrow by applying the both-end support structure, simplify the connection structure between the drive rod and the 41 arm member 42, and reduce the size and weight of the switchgear 21. it can.

  Further, in this opening / closing device 21, since the layout of the drive rod 41 to the vehicle body 12 is improved, the actuator unit 22 can be stored in a narrow range in the roof portion 12a in order to reduce the amount of protrusion into the vehicle interior. The advance / retreat direction of the drive rod 41 can be appropriately set. Therefore, the cabin space of the vehicle 11 can be widened and the operating efficiency of the opening / closing device 21 can be increased.

  Further, in this opening / closing device 21, a connecting portion between the drive rod 41 and the arm member 42 is formed as a both-end support structure, thereby preventing load fluctuation in a direction perpendicular to the moving direction between the drive rod 41 and the arm member 42. Therefore, the noise generated when the arm member 42 collides with the guide bracket 51 can be reduced.

  Furthermore, in this opening / closing device 21, the guide bracket 51 is formed in a closed shape, so that its rigidity is increased.

  Further, in this opening / closing device 21, since the connecting portion of the drive rod 41 and the arm member 42 is a double-supported structure, a structure for preventing the drive rod 41 and the arm member 42 from being twisted is not required, so the number of parts is reduced. Thus, the manufacturing cost of the switchgear 21 can be reduced.

  On the other hand, when the back door 13 is driven by the electric motor 26 and moves in the closing direction from the fully open position to the fully closed position, first, the rack 33 is separated from the back door 13 in the state shown in FIG. The drive rod 41 is moved along the guide hole 55 with its tip being guided by the inner guide surface 52b. When the back door 13 reaches the fully closed position shown in FIG. 6A through the state shown in FIG. 6B, the electric motor 26 stops and the closing operation of the back door 13 ends.

  FIG. 7 is an exploded perspective view showing details of the connecting portion between the drive rod and the arm member, and FIG. 8 is a cross-sectional view showing details of the connecting portion between the drive rod and the arm member.

  In the opening / closing device 21, the guide bracket 51 for guiding the tip of the drive rod 41 is fixed to the vehicle body 12, and the arm member 42 is fixed to the back door 13. There may be a deviation in the movement path of the tip of the drive rod 41 guided by the bracket 51. Therefore, in the opening / closing device 21, as shown in FIG. 7, a displacement absorbing portion 62 is provided at the connecting portion between the drive rod 41 and the arm member 42, and the displacement absorbing portion 62 causes the movement path of the drive rod 41 and the arm member 42 to move. The shift in the direction perpendicular to the guide surfaces 52b and 53b of the arm member 42 with respect to the tip end portion of the drive rod 41 caused by the shift is absorbed.

  As shown in FIG. 7, a long hole 63 is formed in the distal end portion (the end portion on the side connected to the drive rod 41) of the arm member 42 in order to configure the deviation absorbing portion 62. As shown in FIG. 8, the long hole 63 is formed to extend in a direction perpendicular to the guide surfaces 52b and 53b, that is, a direction orthogonal to the moving direction of the arm member 42. The connecting pin 45 is inserted into the hole 63 so as to be connected to the drive rod 41. The connecting pin 45 is movable along the long hole 63, whereby the arm member 42 is relatively movable with respect to the distal end portion of the drive rod 41 in a direction perpendicular to the guide surfaces 52 b and 53 b. . Therefore, even when the movement path of the distal end portion of the arm member 42 is deviated from the movement path of the distal end portion of the drive rod 41, the displacement is caused by the movement of the connecting pin 45 along the long hole 63. Is absorbed. The displacement of the movement path between the arm member 42 and the drive rod 41 is caused by the movement of the arm member 42 being shifted from the guide surfaces 52b and 53b because the drive rod 41 always moves along the guide surfaces 52b and 53b. Although a gap is provided between the arm member 42 and the guide bracket 51 in a direction perpendicular to the guide surfaces 52b and 53b, interference between the arm member 42 and the guide bracket 51 is within a predetermined range. Is prevented.

  As described above, since the opening / closing device 21 is provided with the shift absorbing portion 62 at the connecting portion between the drive rod 41 and the arm member 42, the dimensions of the arm member 42, the guide bracket 51, etc., or the back door 13 of these members. Alternatively, even if an error occurs in the assembly position on the vehicle body 12 and the movement path of the arm member 42 is deviated from the movement path of the distal end portion of the drive rod 41, the deviation is absorbed and driven. The rod 41 and the arm member 42 can be operated smoothly. That is, the smoothness of the operation of the opening / closing device 21 is ensured without strictly managing the dimensional accuracy of the arm member 42 and the guide bracket 51 and the accuracy of the assembly position of these members to the back door 13 or the vehicle body 12. Can do. Accordingly, it is possible to easily manage the dimensional accuracy of the arm member 42 and the guide bracket 51 and the assembly accuracy of these members to the back door 13 or the vehicle body 12, and to reduce the manufacturing cost of the opening / closing device 21.

  Further, in the opening / closing device 21, a connecting pin 45 is attached to the distal end portion of the drive rod 41, and a long hole 63 extending in a direction perpendicular to the respective guide surfaces 52b and 53b is formed in the distal end portion of the arm member 42, By inserting the connecting pin 45 into the elongated hole 63, the shift absorbing portion 63 is configured at the connecting portion of the arm member 42 and the drive rod 41. The manufacturing cost can be further reduced.

The direction of the component force F ₁ to the drive rod 41 is applied to the arm member 42 so orthogonal to the direction in which the elongated hole 63 extends, the force component F ₁ is transmitted to the arm member 42 without backlash.

  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 opening / closing body is the back door 13 that is mounted on the rear end portion of the vehicle 11 so as to be freely opened and closed in the vertical direction. It may be a body.

  Further, in the above embodiment, the displacement absorbing portion 62 is configured by the connecting pin 45 attached to the distal end portion of the drive rod 41 and the long hole 63 formed in the arm member 42. For example, the connecting rod 45 is attached to the distal end portion of the arm member 42, and a long hole 63 extending in a direction perpendicular to the guide surfaces 52b and 53b is formed in the distal end portion of the drive rod 41. Any structure may be used as long as it can be coupled and can absorb the shift in the direction perpendicular to the guide surfaces 52b and 53b of the arm member 42 with respect to the tip of the drive rod 41.

  Furthermore, in the above-described embodiment, the linear reciprocating motion of the rack 33 is transmitted to the arm member 42 via the drive rod 41. However, the present invention is not limited to this. For example, the rack 33 is output to which the pinion 34 is fixed. The rack 28 may be provided so as to be swingable about the shaft 28 and the rack 33 may be directly and rotatably connected to the arm member 42.

  Further, in the above-described embodiment, the tip of the drive rod 41 is moved along the guide hole 55 by the roller 61 rotatably mounted on the drive rod 41 rolling on the guide surfaces 52b and 53b. However, the present invention is not limited to this. For example, a sliding member may be attached to the tip of the drive rod 41 and the sliding member may be brought into sliding contact with the guide surfaces 52b and 53b.

  Further, the shapes and materials of the drive rod 41, the arm member 42, and the guide bracket 51 are not limited to those of the present embodiment, and are appropriately set according to the vehicle type, the weight of the back door 13, and the like. is there.

  Furthermore, in the above-described embodiment, the arm member 42 is formed in an arc shape that curves around the rotation center axis 14a of the hinge 14, but is not limited to this, and may be a linear shape or other shapes. There may be.

It is a side view which shows the rear-end part of the vehicle provided with the vehicle automatic opening / closing apparatus which is one embodiment of this invention. It is a top view which shows the detail of the automatic opening / closing apparatus for vehicles shown in FIG. (A) is the perspective view which looked at the link mechanism shown in FIG. 2 from the vehicle body upper side, (b) is the perspective view which looked at the link mechanism shown in the figure (a) from the vehicle body lower side. It is sectional drawing which follows the AA line shown in FIG. It is an enlarged view which shows the detail of the front-end | tip part of the drive rod shown in FIG. (A)-(c) is explanatory drawing which shows the operation state of a link mechanism at the time of a back door opening operation, respectively. It is a disassembled perspective view which shows the detail of the connection part of a drive rod and an arm member. It is sectional drawing which shows the detail of the connection part of a drive rod and an arm member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Vehicle 12 Car body 12a Roof part 13 Back door 14 Hinge 14a Rotation center shaft 21 Vehicle automatic opening / closing device 22 Actuator unit 23 Link mechanism 24 Base bracket 25 Drive unit 26 Electric motor 27 Reducer 28 Output shaft 29 Gas stay 31 Power conversion mechanism 32 Guide rail 33 Rack 33a Slide part 33b Rack tooth 33c Guide groove 34 Pinion 35 Guide pin 41 Drive rod 41a Connecting wall 42 Arm member 43 Pin member 44 Fixed bracket 44a Mounting hole 45 Connecting pin 51 Guide bracket 52 Main bracket 52a Inner guide wall 52b Inner guide surface 53 Sub bracket 53a Outer guide wall 53b Outer guide surface 53c Protruding portion 54 Inner relief portion 55 Guide hole 56 Outer relief portion 61 Roller 62 Deviation absorbing portion 6 Long hole F ₀ driving force F _{1, F 2} component force

Claims (6)

An automatic opening and closing device for a vehicle that automatically opens and closes an opening and closing body attached to a vehicle body via a hinge,
A drive member that is driven by a drive source and moves forward and backward toward the opening and closing body;
An arm member having one end pivotably connected to the tip of the drive member and the other end fixed to the opening / closing body;
A guide member that is formed in an arc shape that curves around the rotation center axis of the hinge and that guides the tip of the drive member; and a guide member that is fixed to the vehicle body,
An automatic opening and closing device for a vehicle, wherein a shift absorbing portion that absorbs a shift of the arm member with respect to a tip end portion of the drive member is provided at a connection portion between the drive member and the arm member.   2. The automatic opening / closing device for a vehicle according to claim 1, wherein the arm member is formed in an arc shape that is curved around the rotation center axis of the hinge.   The automatic opening and closing device for a vehicle according to claim 1 or 2, wherein an elongated hole extending in a direction perpendicular to the guide surface is formed at one end of the arm member, and inserted into the elongated hole at a distal end portion of the driving member. An automatic opening and closing device for a vehicle, wherein the shift absorbing portion is configured by attaching a connecting pin.   The automatic opening and closing device for a vehicle according to any one of claims 1 to 3, wherein a roller that rolls on the guide surface is rotatably mounted on a distal end portion of the driving member. Switchgear.   The vehicle automatic opening / closing device according to any one of claims 1 to 4, wherein a gap is provided between the arm member and the guide member in a direction perpendicular to the guide surface. Automatic opening and closing device.   The automatic opening / closing device for a vehicle according to any one of claims 1 to 5, wherein a rack that is driven by the drive source to reciprocate linearly is provided, and the drive member formed in a rod shape is swingable to the rack. An automatic opening / closing device for a vehicle characterized by being connected to the vehicle.

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