JP5123233B2 - Power tailgate device - Google Patents

Description

  The present invention relates to a power tailgate device that automatically opens and closes a tailgate attached to a rear end portion of a vehicle so as to be opened and closed in the vertical direction of the vehicle via a hinge.

  Vehicles such as automobiles are provided with opening / closing bodies such as a window glass provided at a door and a tailgate (back door) provided at a rear end of a vehicle body. In order to facilitate the opening / closing operation of these opening / closing bodies, vehicles equipped with automatic opening / closing devices such as a power window device and a power tailgate device have been developed.

  As such an automatic opening / closing device, for example, an opening / closing body is connected to the tip of a drive arm that is swingably supported by a support shaft on a vehicle body or a door, such as a power window device having an X-arm type regulator. A so-called arm drive type is known in which the drive arm is driven to swing by an electric motor to open and close the open / close body. In this case, a gear case that houses the worm gear mechanism is attached to the electric motor, and a drive gear fixed to the output shaft is disposed on the outer surface of the gear case, and a driven gear provided at the base end of the drive arm. Is meshed with the drive gear. Thus, when the electric motor is operated, the rotation is transmitted from the drive gear to the driven gear, and the drive arm swings together with the driven gear.

  On the other hand, as such an automatic opening / closing device, a device is known in which a bracket is fixed to a gear case and a support shaft is supported by this bracket in order to maintain the meshing pitch of the drive gear and the driven gear. . However, even in such a configuration, when a load is applied from the opening and closing body to the drive arm in a direction inclined with respect to the support shaft, the driven gear is inclined with respect to the drive gear, and the meshing accuracy is deteriorated. There is a case where abnormal noise is generated from the meshing portion or the operating efficiency of the automatic opening / closing device is lowered.

  Therefore, for example, in the automatic opening / closing apparatus disclosed in Patent Document 1, a pressing portion that abuts against the side surface of the driven gear and presses the driven gear toward the gear case by using a part of the bracket is provided. Thus, the inclination of the driven gear is suppressed and the meshing between the drive gear and the driven gear is maintained.

JP 2001-90796 A

  However, in the automatic opening and closing device disclosed in Patent Document 1, the pressing portion is provided at the tip portion of the covering portion that protrudes from the driving gear side to the driven gear side and covers the meshing portion of each gear. Thus, when a large load is applied, the support rigidity may be insufficient. In addition, since the load from the driven gear is supported by the gear case only on one side through the covering portion, it is difficult to sufficiently suppress the inclination of the driven gear.

  An object of the present invention is to improve the meshing accuracy of the drive gear and the driven gear and to increase the operation efficiency of the power tailgate device.

A power tailgate device according to the present invention is a power tailgate device that automatically opens and closes a tailgate that is mounted on a rear end of a vehicle so as to be opened and closed in the vertical direction of the vehicle via a hinge. An electric motor disposed on the vehicle body; a gear case attached to the electric motor; a worm gear mechanism housed in the gear case that decelerates the rotation of the rotation shaft and transmits the rotation to the output shaft; and the output shaft A drive gear that is disposed outside the gear case and rotates with the output shaft, and is pivotally supported by a support shaft that is provided integrally with the gear case and meshed with the drive gear, A driven gear having an arc-shaped groove centered on the axis of the support shaft, and is provided integrally with the driven gear and connected to the tailgate, together with the driven gear A drive arm that swings to open and close the tailgate, a first fastening member that passes through the groove and is assembled to the gear case, and a second arm that is disposed on the outer peripheral side of the driven gear and is assembled to the gear case. A gear cover fixed to the gear case by a fastening member and covering a meshing portion of the drive gear and the driven gear; a cover-side pressing portion provided on the gear cover and in contact with a side surface of the driven gear ; And a case-side pressing portion that is provided on the gear case and contacts a side surface opposite to a side surface of the driven gear that contacts the cover-side pressing portion .

In the power tailgate device of the present invention, the driven gear is provided with a gear portion at an arc-shaped outer peripheral portion, the gear portion is meshed with the drive gear, and the cover-side pressing portion is formed on the support shaft. The case-side pressing portion extends in an arc shape centered on the support shaft and projects toward the driven gear. It has been characterized by Rukoto.

  The power tailgate device according to the present invention is characterized in that the tip of the support shaft is supported by the gear cover.

  In the power tailgate device of the present invention, a nut is assembled to the gear case, the first and second fastening members are bolts that are screw-coupled to the nut, and the first and second fastening members are A fixing portion that can be fixed to the vehicle body is formed at each end, and the fixing portion protrudes from the nut so as to penetrate the nut and be fixed to the vehicle body.

  In the power tailgate device of the present invention, a bracket is integrally fixed to the gear case, and a support shaft that pivotally supports the driven gear is provided on the bracket, and the gear cover is the first fastening member. It is fixed to the bracket by the above.

  The power tailgate device according to the present invention is characterized in that the bracket is fixed to the gear case in a state where the gear cover and the driven gear are assembled to the bracket in advance to form a unit.

  According to the present invention, the gear cover that suppresses the inclination of the driven gear includes the first fastening member that passes through the arc-shaped groove provided in the driven gear, and the second fastening member that is disposed on the outer peripheral side of the driven gear. Thus, the gear case is fixed to the gear case and supported by the gear case on both sides of the meshing portion of the drive gear and the driven gear, so that the inclination of the driven gear can be reliably prevented by the gear cover. Thereby, the meshing accuracy of the drive gear and the driven gear can be improved, the generation of noise from the meshing portion can be prevented, and the operating efficiency of the power tailgate device can be enhanced.

  According to the present invention, since the driven gear is pressed by the arc-shaped pressing portion provided in the gear cover, the inclination of the driven gear can be surely pressed to further improve the meshing accuracy between the drive gear and the driven gear. it can.

  According to the present invention, since the tip end of the support shaft is supported by the gear cover, the support shaft is prevented from being inclined with respect to the gear case, and the engagement accuracy between the drive gear and the driven gear is further increased. Can do.

  According to the present invention, since the bolt for fixing the gear cover to the gear case is used in combination as a bolt for fixing the gear case to the vehicle body, the number of parts of the power tailgate device is reduced, The cost can be reduced.

  According to the present invention, since the support shaft is provided on the bracket that is integrally fixed to the gear case, and the gear cover is fixed to the bracket by the first fastening member, the bracket, the drive arm, and the like are changed. Thus, it is possible to correspond to the specification on the vehicle side. Thus, the versatility of the power tailgate device can be enhanced by using a gear case in each specification.

  According to the present invention, since the bracket is fixed to the gear case in a united state in which the gear cover and the driven gear are assembled in advance, the assembly work of the power tailgate device can be facilitated. .

It is a perspective view of the door provided with the power window device which is one embodiment of the present invention. It is a perspective view which shows the detail of the drive unit shown in FIG. It is the perspective view which looked at the drive unit shown in FIG. 2 from the back side. FIG. 3 is an exploded perspective view of the drive unit shown in FIG. 2. It is sectional drawing which follows the AA line in FIG. It is a perspective view which shows the detail of the gear cover shown in FIG. It is a front view which shows the modification of the drive unit shown in FIG. (A), (b) is a figure which shows a part of vehicle provided with the power tailgate apparatus which is other embodiment of this invention, respectively. It is a perspective view which shows the detail of the power tailgate apparatus shown in FIG. FIG. 10 is a perspective view showing a unitized state of the bracket shown in FIG. 9.

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

  FIG. 1 is a perspective view of a door provided with a power window device according to an embodiment of the present invention. This door 11 is a front door constituting a vehicle body of a vehicle (not shown). The window glass 12 is provided. The window glass 12 is supported by a pair of guide units 13 provided inside the door 11, and can be opened and closed in the vertical direction of the vehicle along these guide units 13. A power window device 21 as an automatic opening and closing device for a vehicle is disposed inside the door 11, and the window glass 12 is automatically opened and closed by the power window device 21.

  The power window device 21 includes a window regulator 22 and a drive unit 23, and has a structure in which the window regulator 22 is operated by the drive unit 23 to open and close the window glass 12.

  The window regulator 22 is an X-arm type, and includes a lift arm 24 and an equalizer arm 25 as drive arms. The lift arm 24 is formed of a steel plate, and is supported by the drive unit 23 at the base end portion thereof so as to be swingable in the vertical direction inside the door 11. On the other hand, the equalizer arm 25 is formed of a steel plate, and is pivotally supported at a substantially central portion in the longitudinal direction of the lift arm 24 by a connecting shaft 26 at a substantially central portion in the longitudinal direction. Rollers (not shown) are attached to the tip of the lift arm 24 and the tip of the equalizer arm 25, respectively, and these rollers are movably attached to a roller guide 27 fixed to the lower end of the window glass 12. A roller (not shown) is also mounted on the base end portion of the equalizer arm 25, and this roller is mounted on a roller guide 28 fixed to the door 11 so as to be movable. The drive unit 23 is configured to swing the lift arm 24. When the lift arm 24 is driven to swing by the drive unit 23, the lift arm 24 and the equalizer arm 25 are tilted about the connecting shaft 26. Then, the window glass 12 is opened and closed in the vertical direction in the figure.

  2 is a perspective view showing details of the drive unit shown in FIG. 1, and FIG. 3 is a perspective view of the drive unit shown in FIG. 2 as seen from the back side. 4 is an exploded perspective view of the drive unit shown in FIG. 2, and FIG. 5 is a cross-sectional view taken along line AA in FIG.

  Next, the structure of the drive unit 23 will be described.

  The drive unit 23 includes an electric motor 31, and a speed reducer 32 is attached to the electric motor 31 to form one unit. The speed reducer 32 includes a resin gear case 33 attached to the electric motor 31, and a worm gear mechanism 34 is accommodated inside a cylindrical body portion 33 a.

  As shown in FIG. 5, the electric motor 31 is provided with an armature shaft 31a as a rotating shaft. The armature shaft 31a projects into the main body 33a of the gear case 33, and a worm 34a is formed on the outer peripheral surface of the projecting portion. Are integrally formed. A worm wheel 34b meshing with the worm 34a is accommodated in the main body 33a of the gear case 33. The worm wheel 34b is fixed to the output shaft 35 supported by the gear case 33 and is rotatable together with the output shaft 35. Yes. The worm gear mechanism 34 includes a worm 34a and a worm wheel 34b. When the electric motor 31 is operated, the rotation of the armature shaft 31a is decelerated to a predetermined number of rotations by the worm gear mechanism 34 and output from the output shaft 35. It has come to be.

  A connector 36 is provided integrally with the gear case 33, and the electric motor 31 is connected to a control device (not shown) mounted on the vehicle via the connector 36. The operation of the electric motor 31 is controlled by a control device based on a command signal such as a power window switch (not shown).

  The tip of the output shaft 35 protrudes outside the gear case 33, and a pinion 37 as a drive gear is fixed to the tip of the output shaft 35 protruding outside the gear case 33 as shown in FIGS. ing. That is, the pinion 37 is disposed outside the gear case 33, that is, on the outer surface of the main body portion 33 a, and rotates together with the output shaft 35.

  The gear case 33 is integrally provided with a base portion 33b that protrudes in the radial direction from the main body portion 33a, and a support hole 38 is formed on the distal end side of the base portion 33b. A bearing 43 is inserted into the support hole 38 to support the large-diameter portion 41c of the support shaft 41, and the sector gear 42 as a driven gear is supported by a gear case by the support shaft 41 integrally supported by the base portion 33b. The base portion 33b of 33 is swingably supported.

  The sector gear 42 is formed in a fan shape with a steel plate, and a mounting hole 42a is provided in the axial center thereof. A gear portion 42b is provided on the arc-shaped outer peripheral portion of the sector gear 42, and an arc-shaped groove portion 42c centering on the mounting hole 42a is provided between the gear portion 42b and the mounting hole 42a. Is formed. The sector gear 42 is swingably supported by the support shaft 41 by inserting the support shaft 41 through the mounting hole 42 a, and the gear portion 42 b is engaged with the pinion 37. As a result, when the electric motor 31 is operated, the sector gear 42 is driven by the pinion 37, that is, the electric motor 31, and swings within a predetermined angle range around the support shaft 41.

  Here, in the power window device 21, as described above, the pinion 37 is supported on the gear case 33 by the output shaft 35, and the sector gear 42 meshing with the pinion 37 is supported on the base portion 33 b of the gear case 33 by the support shaft 41. I am doing so. As a result, the meshing pitch between the pinion 37 and the sector gear 42 can be accurately maintained by the gear case 33. Therefore, the meshing accuracy between the pinion 37 and the sector gear 42 is ensured, and the operating efficiency of the drive unit 23 is increased. be able to.

  On the other hand, a fixed piece 24 a is integrally provided at the base end of the lift arm 24. The fixed piece 24a is disposed so as to overlap the sector gear 42 between the sector gear 42 and the base portion 33b, and the support shaft 41 is inserted through the through hole 24b. Around the through hole 24b in the fixed piece 24a, three fixed holes 24c are concentrically arranged at equal intervals. On the other hand, around the mounting hole 42a of the sector gear 42, a concave portion 42d is formed on the gear cover 51 side by stamping molding or the like, so that three fixed bosses 42e are formed on the lift arm 24 side so as to protrude concentrically at equal intervals. The fixing hole 24c and the fixing boss 42e can be engaged with each other. That is, the lift arm 24 is formed separately from the sector gear 42, and is integrally engaged with the sector gear 42 at the base end thereof so that the lift arm 24 is swingably supported together with the sector gear 42 on the support shaft 41. .

  As shown in FIGS. 4 and 5, the support shaft 41 is inserted into the support hole 38 from the opposite side across the base portion 33 b of the sector gear 42 to support the large diameter portion 41 c and the small diameter of the support shaft 41. The tip 41a is crimped on the sector gear 42 side with the portion 41b passing through the mounting hole 42a of the sector gear 42 and the through hole 24b of the fixed piece 24a, and the fixed hole 24c and the fixed boss 42d are engaged with each other. . As a result, the lift arm 24 and the sector gear 42 are maintained in a concavo-convex engagement state. The lift arm 24 and the sector gear 42 may be fixed to the main part of the sector gear 42 by fastening means such as welding, screwing, and rivets.

  A gear cover 51 is fixed to the gear case 33 in order to cover the meshing portion of the pinion 37 and the sector gear 42 and to suppress the inclination of the sector gear 42 with respect to the axial direction of the support shaft 41.

  FIG. 6 is a perspective view showing the details of the gear cover shown in FIG. 2. The gear cover 51 is made of resin, and a cylinder that covers one outer surface on which the pinion 37 of the main body 33a of the gear case 33 is disposed. The part 51a and a plate-like extension part 51b extending in the radial direction from the cylindrical part 51a toward the support shaft 41 are integrally formed.

  The cylindrical portion 51a of the gear cover 51 is integrally provided with a pair of cover-side fixing legs 52 that protrude in opposite directions toward each other in a direction orthogonal to the extending direction of the extension portion 51b. Each side fixing leg 52 is provided with a bolt hole 52a. On the other hand, the body 33a of the gear case 33 is provided with a pair of case-side fixing legs 53 corresponding to the cover-side fixing legs 52. The case-side fixing legs 53 are provided with insertion holes 53a. .

  Bolts 54 as second fastening members are respectively inserted into the bolt holes 52a of the cover side fixing legs 52 from the side opposite to the gear case 33, and the insertion holes 53a of the case side fixing legs 53 are respectively provided with flanges. A sleeve-like nut 55 is inserted from the opposite side of the gear cover 51 and each bolt 54 is screwed to the corresponding nut 55 so that the gear cover 51 is fixed to the gear case 33. Yes.

  Here, the cover-side fixed leg 52 and the case-side fixed leg 53 are respectively arranged on the outer peripheral side of the sector gear 42, that is, on the outer side of the movement range of the sector gear 42. Thereby, the gear cover 51 is fixed to the gear case 33 by the bolt 54 and the nut 55 on the outer peripheral side of the sector gear 42.

  As shown in FIG. 4, a bolt hole 56 that opens toward the groove portion 42c of the sector gear 42 is provided on the distal end side of the extension portion 51b of the gear cover 51, and the base portion 33b of the gear case 33 corresponds to this. An insertion hole 57 that opens toward the groove 42c is provided. A bolt 58 as a first fastening member is inserted into the bolt hole 56 from the side opposite to the base portion 33b, and the bolt 58 passes through the groove portion 42c of the sector gear 42 and the insertion hole 57 of the gear case 33 to enter the base portion. It protrudes to the back side of 33b. On the other hand, a sleeve-like nut 59 having a flange is inserted into the insertion hole 57 of the base portion 33b from the side opposite to the extension portion 51b, and the bolt 58 is screwed to the nut 59. As a result, the extension 51b of the gear cover 51 is located closer to the support shaft 41 than the meshing portion of the pinion 37 and the sector gear 42 with respect to the bolt 54 on the cylindrical portion 51a side by the bolt 58 passing through the groove 42c of the sector gear 42. Are fixed to the base portion 33 b of the gear case 33. That is, the gear cover 51 is fixed (supported) to the gear case 33 on both sides of the meshing portion between the pinion 37 and the sector gear 42.

  As shown in FIGS. 5 and 6, a pair of cover side pressing portions 61 a and 61 b are provided on the inner surface of the gear cover 51 facing the sector gear 42. These cover side pressing portions 61 a and 61 b extend in an arc shape centering on the support shaft 41 when the gear cover 51 is fixed to the gear case 33, and are directed from the inner surface of the gear cover 51 toward the sector gear 42. Are formed in a protruding rib shape. One cover side pressing portion 61a abuts on the side surface of the sector gear 42 at the base portion of the gear portion 42b of the sector gear 42, and the other cover side pressing portion 61b is at the outer peripheral portion of the mounting hole 42a of the sector gear 42. It is in contact with the side surface.

On the other hand, as shown in FIGS. 4 and 5, a pair of case-side pressing portions 62 a and 62 b are provided on the outer surface of the gear case 33 facing the sector gear 42. Each of the case-side holding portions 62a and 62b extends in an arc shape centering on the support shaft 41, and is formed in a rib shape protruding toward the sector gear 42 from the outer surface of the gear case 33. The case side pressing part 62a abuts on the side surface of the sector gear 42 at the base part of the gear part 42b of the sector gear 42 from the side opposite to the cover side pressing part 61a, and the other case side pressing part 62b is in the mounting hole 42a of the sector gear 42. The outer peripheral portion is in contact with the side surface of the sector gear 42 from the side opposite to the cover side pressing portion 61b. That is, the sector gear 42, together with the base portion of the gear portion 42b is sandwiched by the cover-side pressing portion 61a provided with the case-side presser 6 2a provided in the gear case 33 to the gear cover 51, a cover provided on the gear cover 51 The outer peripheral portion of the mounting hole 42 a is sandwiched between the side pressing portion 61 b and the case side pressing portion 62 b provided in the gear case 33, whereby the sector gear 42 is pressed against the gear case 33 by the gear cover 51, and its support shaft 41. The inclination with the fulcrum as the fulcrum is suppressed.

  As described above, in the power window device 21, the sector gear 42 is pressed against the gear case 33 by the gear cover 51 that covers the meshing portion of the pinion 37 and the sector gear 42, and the inclination with the support shaft 41 as a fulcrum is suppressed. Therefore, it is possible to secure the meshing accuracy between the pinion 37 and the sector gear 42 to prevent the generation of noise from the meshing portion and to increase the operating efficiency of the drive unit 23. Further, the sector gear 42 is pressed by the arc-shaped case-side pressing portions 62a and 62b provided on the gear case 33 and the arc-shaped cover-side pressing portions 61a and 61b provided on the gear cover 51. The pressing portions 61a, 61b, 62a, and 62b are always brought into contact with the swinging sector gear 42 within a predetermined range, so that the inclination of the sector gear 42 can be reliably pressed.

  Further, as described above, in the power window device 21, the gear cover 51 that suppresses the inclination of the sector gear 42 is provided with the bolt 58 that penetrates the groove 42 c provided in the sector gear 42 and the bolt 54 that is disposed on the outer peripheral side of the sector gear 42. Thus, the gear cover 51 can be supported on the gear case 33 on both sides of the meshing portion between the pinion 37 and the sector gear 42. Thereby, the load from the sector gear 42 can be reliably supported by the gear cover 51, and the inclination of the sector gear 42 around the support shaft 41 can be reliably prevented.

  Further, in the power window device 21, the lift arm 24 and the sector gear 42 are formed separately, so that the drive unit 23 uses the lift arm 24 having a different shape as it is according to the specifications of the vehicle. Can do. Thereby, the drive unit 23 can be used together in each specification, and thereby the versatility of the drive unit 23, that is, the power window device 21, can be enhanced.

  As shown in FIG. 5, the bolts 54 and 58 in which the gear cover 51 is fixed to the gear case 33 by screw coupling to the nuts 55 and 59 have their tips passing through the nuts 55 and 59, respectively. Projects to the back side. On the other hand, the door panel 11 a provided inside the door 11 is provided with an attachment hole 63 for attaching the drive unit 23. And the front-end | tip part of each volt | bolts 54 and 58 is penetrated to the corresponding attachment hole 63, and the drive unit 23 makes the drive unit 23 the axial direction of the pinion 37 by fastening the nut 64 to the volt | bolts 54 and 58 from the opposite side of the door panel 11a. The door 11 is fixed to the door panel 11a in the thickness direction.

  As described above, in the power window device 21, the front ends of the bolts 54 and 58 for fixing the gear cover 51 to the gear case 33 are fixed to the vehicle, and the gear case 33, that is, the drive unit 23 is attached to the door panel 11a. Since it is used together as a bolt for fixing, another bolt for fixing the drive unit 23 to the door panel 11a can be made unnecessary. Thereby, the number of parts of this power window apparatus 21 can be reduced, and the cost can be reduced.

  FIG. 7 is a front view showing a modification of the drive unit shown in FIG. In FIG. 7, members corresponding to those described above are denoted by the same reference numerals.

  In the case shown in FIG. 2, the support shaft 41 that swingably supports the sector gear 42 and the lift arm 24 is supported only at one end in the axial direction by the support hole 38 provided in the base portion 33 b of the gear case 33. ing.

  On the other hand, in the modification shown in FIG. 7, the extension 51b of the gear cover 51 fixed to the gear case 33 is further extended to the portion of the support shaft 41, and the support hole 65 provided in the extension 51b is used. The other end of the support shaft 41 is supported. As a result, the support shaft 41 is supported by the gear case 33 and the gear cover 51 at both ends of the sector gear 42 and the support rigidity thereof is increased.

  As described above, the support rigidity of the support shaft 41 is supported by supporting one end (base end) of the support shaft 41 with the support hole 38 of the gear case 33 and supporting the other end (front end) with the support hole 65 of the gear cover 51. The inclination of the sector gear 42 supported by the support shaft 41 can be prevented more reliably.

  FIGS. 8A and 8B are views showing a part of a vehicle equipped with a power tailgate device according to another embodiment of the present invention, and FIG. 9 shows the power tailgate device shown in FIG. FIG. 10 is a perspective view showing details, and FIG. 10 is a perspective view showing a unitized state of the bracket shown in FIG. 8 to 10, members corresponding to those described above are denoted by the same reference numerals.

  A power tailgate device 71 as an automatic opening and closing device for a vehicle shown in this embodiment automatically opens and closes a tailgate 73 as an opening and closing body provided in a vehicle 72, and its drive unit 23 is a vehicle body 74. Arranged in the rear pillar 74a.

  The tailgate 73 is attached to the rear end portion of the roof portion 74b of the vehicle body 74 via a hinge 75, and the fully closed position shown in FIG. 8A and the fully opened position shown in FIG. The vehicle 72 can be opened and closed freely between the positions.

  As shown in FIG. 9, the drive unit 23 includes a bracket 76 formed of a steel plate, and the bracket 76 is integrated with an outer surface of the gear case 33 on the side where the output shaft 35 is provided by three bolts 77. It is fixed to. The pinion (not shown) is rotatably supported by a bracket 76 by a bearing 78, and can rotate integrally with an output shaft (not shown) in the speed reducer 32 when the bracket 76 is integrally fixed to the gear case 33. And is rotated together with the output shaft.

  The support shaft 41 is provided between the bracket 76 and the extension 51 b of the gear cover 51, and the sector gear 42 is swingably supported by the bracket 76 via the support shaft 41. That is, the sector gear 42 is swingably supported by the gear case 33 by the support shaft 41 provided on the bracket 76. The gear cover 51 is also fixed to the bracket 76 by bolts 54 and 58. Thereby, also in the present embodiment, the support shaft 41 is supported by the bracket 76 and the gear cover 51 at both ends sandwiching the sector gear 42, and the support rigidity is increased.

  As shown in FIG. 10, the bracket 76 is unitized in advance by assembling a pinion, a support shaft 41, a sector gear 42, a gear cover 51, and the like. The bracket 76 is fixed to the gear case 33 with bolts 77 in a unitized state.

  Thus, since the bracket 76 is fixed to the gear case 33 in a state in which the sector gear 42, the gear cover 51, etc. are assembled in advance, the assembly work of the power tailgate device 71 can be facilitated. .

  In the power tailgate device 71, the unitized bracket 76 is fixed to the gear case 33 by assembling the sector gear 42, the gear cover 51, etc., so that the unitized bracket 76 is replaced. Thus, it is possible to cope with the specification change on the vehicle 72 side while using the gear case 33 together. Thereby, the versatility of the gear case 33, that is, the power tailgate device 71 can be enhanced.

  In this embodiment, the lift arm 24 is formed integrally with the sector gear 42, and the tip of the lift arm is connected to the tail gate 73 via the drive rod 81. The tailgate 73 is opened and closed when the lift arm 24 swings in the vertical direction of the vehicle 72 together with the sector gear 42.

  Reference numeral 82 denotes a gas stay for assisting the opening and closing of the tailgate 73.

  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 case where the present invention is applied to the power window device 21 and the power tailgate device 71 of the vehicle is shown. However, the present invention is not limited to this. The present invention may be applied to other automatic opening / closing devices for vehicles as long as they are automatic opening / closing devices for vehicles.

  In the above-described embodiment, the driven gear is the sector-shaped sector gear 42. However, the present invention is not limited to this, and a circular gear provided with a gear portion on the entire circumference may be used.

11 door 11a door panel 12 window glass (opening and closing body)
13 Guide unit 21 Power window device (automatic opening and closing device for vehicle)
22 window regulator 23 drive unit 24 lift arm (drive arm)
24a Fixed piece 24b Through hole 24c Fixed hole 25 Equalizer arm 26 Connecting shaft 27, 28 Roller guide 31 Electric motor 31a Amateur shaft (rotating shaft)
32 Reducer 33 Gear case 33a Body 33b Base 34 Worm gear mechanism 34a Worm 34b Worm wheel 35 Output shaft 36 Connector 37 Pinion (drive gear)
38 Support hole 41 Support shaft 41a Tip portion 41b Small diameter portion 41c Large diameter portion 42 Sector gear (driven gear)
42a Mounting hole 42b Gear part 42c Groove part 42d Recess 42e Fixed boss 43 Bearing 51 Gear cover 51a Cylindrical part 51b Extension part 52 Cover side fixing leg 52a Bolt hole 53 Case side fixing leg 53a Insertion hole 54 Bolt (second fastening member)
55 Nut 56 Bolt hole 57 Insertion hole 58 Bolt (first fastening member)
59 Nut 61a, 61b Cover side holding portion 62a, 62b Case side holding portion 63 Mounting hole 64 Nut 65 Support hole 71 Power tailgate device (automatic vehicle opening / closing device)
72 Vehicle 73 Tailgate (opening / closing body)
74 Car body 74a Rear pillar 74b Roof portion 75 Hinge 76 Bracket 77 Bolt 78 Bearing 81 Drive rod 82 Gas stay

Claims (6)

A power tailgate device that automatically opens and closes a tailgate that can be freely opened and closed in a vertical direction of the vehicle via a hinge at a rear end of the vehicle,
An electric motor having a rotating shaft and disposed on the vehicle body;
A gear case attached to the electric motor;
A worm gear mechanism that is housed in the gear case and decelerates the rotation of the rotating shaft and transmits it to the output shaft;
A drive gear provided on the output shaft, disposed outside the gear case and rotating together with the output shaft;
A driven gear which is supported by a support shaft provided integrally with the gear case so as to be swingable and meshed with the drive gear, and which has an arc-shaped groove centered on the shaft center of the support shaft;
A drive arm provided integrally with the driven gear and connected to the tailgate, swinging with the driven gear to open and close the tailgate;
The drive gear is fixed to the gear case by a first fastening member that penetrates the groove and is assembled to the gear case, and a second fastening member that is disposed on the outer peripheral side of the driven gear and is assembled to the gear case. And a gear cover that covers a meshing portion between the driven gear and the driven gear ;
A cover-side pressing portion provided on the gear cover and in contact with a side surface of the driven gear ;
A power tailgate device, comprising: a case side pressing portion provided on the gear case and contacting a side surface opposite to a side surface on which the cover side pressing portion of the driven gear contacts .
The power tailgate device according to claim 1, wherein the driven gear is provided with a gear portion on an arcuate outer peripheral portion, and the gear portion is meshed with the drive gear,
The cover side pressing portion extends in an arc shape around the support shaft and is formed to protrude toward the driven gear .
The case-side pressing portion, a power tailgate and wherein that you have been formed to protrude toward the driven gear extends in an arc shape centered on the said support shaft.
  The power tailgate device according to claim 1 or 2, wherein a tip end of the support shaft is supported by the gear cover.   The power tailgate device according to any one of claims 1 to 3, wherein a nut is assembled to the gear case, and the first and second fastening members are bolts that are screw-coupled to the nut, respectively. A fixing portion that can be fixed to the vehicle body is formed at the tip of each of the first and second fastening members, and the fixing portion protrudes from the nut so as to penetrate the nut and be fixed to the vehicle body. A featured power tailgate device.   The power tailgate device according to any one of claims 1 to 4, wherein a bracket is integrally fixed to the gear case, and a support shaft that pivotally supports the driven gear is provided on the bracket. The power tailgate device, wherein the gear cover is fixed to the bracket by the first fastening member.   6. The power tailgate device according to claim 5, wherein the bracket is fixed to the gear case in a state where the gear cover and the driven gear are assembled in advance into the bracket and unitized. Tailgate device.

Images