JP2012046989A - Drive unit of automatic opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve assemblability of a drive unit.SOLUTION: A drive unit 33 of a power slide device includes a motor 43 with a deceleration mechanism, which comprises a motor body 41 and the deceleration mechanism for decelerating output of the motor body 41 so as to transfer it to an output shaft 55. A tensioner case 61 is attached to the motor 43 with the deceleration mechanism. A drum 65, which is fixed to the output shaft 55 and over which a cable is looped, and tensioner mechanisms 67a and 67b for applying tension to the cable are housed in the tensioner case 61. The tensioner case 61 is opened on the other side of the motor 43 with the deceleration mechanism, and its opening is closed with a bracket 71. The drive unit 33 is fixed to a door panel of a sliding door via an attachment leg portion 71c of the bracket 71.

Description

  The present invention relates to a drive unit for an automatic opening / closing device that automatically opens and closes an opening / closing body provided in a vehicle.

  Conventionally, in wagon type and one box type vehicles, a sliding door (opening and closing body) that opens and closes in the vehicle longitudinal direction is provided on the side of the vehicle body, so that it is possible to easily get on and off the vehicle and load and unload luggage. I have to. A guide rail having a straight line portion extending in the vehicle front-rear direction and a lead-in portion that curves toward the vehicle interior side from the end portion on the vehicle front side of the vehicle is fixed to the vertical center of the vehicle body side portion behind the entrance / exit. Has been. On the other hand, a roller unit that is movably mounted on the guide rail is attached to the upper and lower central portion of the slide door on the vehicle rear side. The sliding door is opened and closed in a sliding manner as the roller unit moves in the vehicle longitudinal direction along the guide rail. That is, when the roller unit is guided to the linear portion of the guide rail, the slide door is opened, and when the roller unit is guided to the guide rail retracting portion, the slide door is drawn into the vehicle interior and is closed.

  In order to easily open and close the sliding door, the vehicle is equipped with a power slide device (automatic vehicle opening and closing device) that automatically opens and closes the sliding door. As a power slide device, a cable type device that automatically opens and closes a slide door by driving a cable routed along the opening and closing direction of the slide door by a drive unit is often used. Cable-type power slide devices include a door built-in type in which a drive unit is mounted on a slide door and a vehicle-incorporated type in which a drive unit is mounted on a side of the vehicle body.

  A drive unit of such a power slide device includes a motor body and a motor with a speed reduction mechanism that includes a speed reduction mechanism that reduces the rotation of the motor body and transmits the rotation to the output shaft, and a drum that is fixed to the output shaft and driven to rotate. Have. A cable is wound around the outer peripheral surface of the drum. When the cable is driven by the rotation of the drum, the sliding door is pulled by the cable and automatically opened and closed.

  Some drive units include a tensioner mechanism for applying tension to the cable. The tensioner mechanism is assembled at a drawing position of a cable routed from the drum. By applying a predetermined tension to the cable by this tensioner mechanism, loosening of the cable is suppressed and the power slide device is operated smoothly. Thus, the drive unit of the power slide apparatus provided with the tensioner mechanism is described in Patent Document 1, for example.

JP 2003-328638 A

  By the way, in the drive unit of the power slide device described in Patent Document 1, a motor with a speed reduction mechanism, a drum case that houses a drum, and a tensioner case that houses a tensioner mechanism are attached to a base plate and fixed to the vehicle body by the base plate. It has come to be. That is, the motor with a speed reduction mechanism, the drum case, and the tensioner case are individually attached to one surface of the base plate. For this reason, the assembling property to the base plate is poor, the area for assembling to the base plate is increased, and the drive unit is increased in size.

  An object of the present invention is to improve the assembling property of the drive unit.

  The drive unit of the automatic opening / closing device of the present invention includes a cable provided along either the opening / closing direction of the opening / closing body provided in either the opening / closing body for opening / closing the opening provided in the vehicle body or the vehicle body. A motor unit with a reduction mechanism that is a drive unit for an automatic opening / closing device that automatically opens and closes the opening / closing body by driving, and includes a motor body and a speed reduction mechanism that decelerates the output of the motor body and transmits it to an output shaft A tensioner case attached to the motor with a speed reduction mechanism and opening to the opposite side of the motor with the speed reduction mechanism, and a drum that is housed in the tensioner case, fixed to the output shaft, and wound around the cable And a tensioner mechanism that is housed in the tensioner case and applies tension to the cable, and is fixed to either the opening / closing body or the vehicle body. And a bracket for closing the opening of the tensioner case, the motor with a speed reduction mechanism is attached to one side of the tensioner case in the axial direction of the output shaft, and the other side of the tensioner case The bracket is attached.

  The drive unit of the automatic opening / closing apparatus according to the present invention is characterized in that the bracket is provided with a convex portion projecting toward the tensioner case, and the tensioner mechanism housed in the tensioner case is pressed by the convex portion.

  The drive unit of the automatic opening / closing apparatus of the present invention has a waterproof cover that covers the motor with a speed reduction mechanism, and a locking claw that is locked to the motor with the speed reduction mechanism is provided on the waterproof cover.

  According to the present invention, since the opening of the tensioner case is closed by the bracket for fixing the motor with the speed reduction mechanism to either the opening / closing body or the vehicle body, the tensioner cover that closes the opening of the tensioner case Compared to the case where the bracket and the bracket are formed separately, the number of parts of the drive unit can be reduced and the assembling workability can be improved. Further, since the bracket is attached to the tensioner case on the side opposite to the motor side with the speed reduction mechanism, the tensioner case and the motor with the speed reduction mechanism can be fixed to the bracket in a state where they are assembled with each other. As a result, the motor with the speed reduction mechanism and the tensioner case can be easily assembled to the bracket, and the assembly area to the bracket can be reduced, and the drive unit can be miniaturized.

  According to the present invention, since the bracket is provided with the convex portion for holding the tensioner mechanism housed in the tensioner case, rattling in the assembly direction of the tensioner mechanism is suppressed, and the automatic opening / closing device is operated smoothly. In addition, it is possible to prevent abnormal noise due to rattling of the tensioner mechanism. In addition, since the rigidity of the bracket is improved by providing the convex portion, it is possible to reduce the weight of the bracket by reducing the thickness of the bracket or providing a hollow hole in the bracket.

It is a side view which shows a part of vehicle which mounts the drive unit of the power slide apparatus which is one embodiment of this invention. It is a perspective view which shows the detail of a power slide apparatus. It is the rear view of the drive unit which looked at the drive unit assembled | attached to the slide door from the vehicle interior side. It is an arrow line view which shows the drive unit seen from the arrow A direction in FIG. It is sectional drawing which follows the BB line in FIG. It is sectional drawing which follows the CC line in FIG. It is a disassembled perspective view of a drive unit. It is an enlarged view which shows a tensioner mechanism. It is explanatory drawing which shows the tensioner mechanism at the time of automatic opening operation | movement. It is explanatory drawing which shows the tensioner mechanism at the time of automatic closing operation | movement. FIG. 4 is a partially cutaway sectional view taken along line DD in FIG. 3. It is a perspective view which shows the attachment state of a waterproof cover and a motor with a speed reduction mechanism.

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

  A vehicle 11 shown in FIG. 1 is a one-box type passenger car, and is provided with a slide door 14 as an opening / closing body for opening / closing an opening 13 for getting on / off provided on a side portion of the vehicle body 12. The sliding door 14 opens and closes the opening 13 by moving in the vehicle front-rear direction along a center rail 15 as a guide rail fixed to the side of the vehicle body 12.

  As shown in FIG. 2, a recessed portion 12 a that is recessed toward the vehicle interior side along the vehicle front-rear direction is formed at a substantially central portion in the vertical direction behind the opening in the side portion of the vehicle body 12. The center rail 15 is disposed in the recess 12a. The center rail 15 is formed in a substantially square cross section that opens to the outside of the passenger compartment. The center rail 15 extends in the vehicle front-rear direction along the side of the vehicle body 12 and the vehicle from the vehicle front end of the straight portion 15a. And a lead-in portion 15b that curves toward the indoor side.

  On the other hand, a roller unit 16 is provided at a substantially central portion in the vertical direction on the vehicle rear side of the slide door 14. The roller unit 16 includes a center arm 19 that is attached to a bracket 17 fixed to a door panel (not shown) of the slide door 14 via a rotation shaft 18. The center arm 19 is supported so as to be pivotable in the horizontal direction with respect to the slide door 14 by a pivot shaft 18 having an axial direction directed in the vehicle vertical direction. The center arm 19 is provided with a roller mounting portion 19a that is bent toward the center rail 15 side, and a traveling roller 20 and a pair of guide rollers 21 are rotatably mounted on the roller mounting portion 19a. The travel roller 20 and the guide roller 21 are disposed in the center rail 15, and the travel roller 20 travels on the vehicle lower surface of the center rail 15 and the guide roller 21 is supported on both surfaces of the center rail 15 in the vehicle width direction. Thus, the center arm 19 is movably mounted on the center rail 15 by being guided.

  When the center arm 19 moves in the vehicle front-rear direction along the center rail 15, the slide door 14 is slidably opened and closed along the side portion of the vehicle body 12. That is, when the center arm 19 is guided to the straight portion 15 a of the center rail 15, the slide door 14 is opened, and when the center arm 19 is guided to the retracting portion 15 b of the center rail 15, the slide door 14 is It is pulled into the vehicle interior side so as to be flush with the side surface and is in a closed state. When the center arm 19 moves on the retracting portion 15 b of the center rail 15, the center arm 19 is rotated with respect to the slide door 14 about the rotation shaft 18, so that the slide door 14 is attached to the vehicle body 12. The vehicle is moved in the longitudinal direction of the vehicle while being substantially parallel to the side portion.

  As shown in FIG. 1, the roller units 22 and 23 provided at the upper and lower ends of the sliding door 14 on the vehicle front side are an upper rail 24 and a lower rail 25 fixed to upper and lower edges of the opening 13 in the vehicle body 12. Each is attached to be freely movable. Thereby, the sliding door 14 is supported by the vehicle body 12 in a total of three places. As shown in FIG. 2, a cover member 26 that covers the center rail 15 is attached to the side of the vehicle body 12 in order to improve the aesthetics of the vehicle 11.

  The vehicle 11 is provided with a power slide device 30 as a vehicle automatic opening / closing device in order to automatically open and close the sliding door 14. The power slide device 30 is a so-called cable-type opening / closing device including a closed cable 31 and an open cable 32 arranged along the opening / closing direction of the slide door 14. The power slide device 30 is a door built-in type opening / closing device in which a drive unit (PSD motor) 33 as a drive source for driving the pair of cables 31 and 32 is mounted in the slide door 14. The drive unit 33 is disposed in the slide door 14 on the vehicle lower side than the roller unit 16.

  One end of the closed cable 31 is fixed to a drum 65 of a drive unit 33 described later. Then, it is routed from the drive unit 33 to the vehicle body 12 side via a pulley provided on the roller unit 16 and routed along the center rail 15, and the other end 31 a is closed on the center rail 15 (center rail 15 The vehicle is locked to the side of the vehicle body 12 in the vicinity of the end on the vehicle front side. Further, one end of the open cable 32 is fixed to the drum 65 of the drive unit 33, and is routed from the drive unit 33 to the vehicle body 12 side via a pulley provided on the roller unit 16, along the center rail 15. The other end 32a is routed, and is locked to the side of the vehicle body 12 in the vicinity of the end of the center rail 15 on the open side (the vehicle rear side of the center rail 15).

  FIG. 3 is a rear view of the drive unit when the drive unit assembled to the slide door is viewed from the vehicle interior side. As shown in FIG. 3, a closed outer casing 35 and an open outer casing 36 for guiding the closed cable 31 and the open cable 32 between the drive unit 33 and the roller unit 16 in the slide door 14. Is provided. Each outer casing 35, 36 is formed in a tube shape from a flexible resin material. The cables 31 and 32 are inserted into the outer casings 35 and 36 between the drive unit 33 and the roller unit 16 and guided along the outer casings 35 and 36.

  End caps 37a and 37b are attached to one ends of the outer casings 35 and 36 on the drive unit 33 side, respectively. By the end caps 37a and 37b, one end of the outer casings 35 and 36 is assembled to the drive unit 33 with the wiring direction thereof toward the roller unit 16 side, that is, the vehicle vertical side. On the other hand, a single casing cap 38 is attached to the other end of the outer casings 35, 36 on the roller unit 16 side. The casing cap 38 is mounted together with the other ends of the outer casings 35 and 36 in a state where the other ends of the outer casings 35 and 36 are arranged side by side in the vehicle vertical direction. With the casing cap 38, the other ends of the outer casings 35 and 36 are assembled to a pulley case 39 provided in the roller unit 16 with the wiring direction thereof directed toward the vehicle front-rear side.

  One end of the outer casings 35 and 36 is assembled to the drive unit 33 toward the vehicle vertical side, and the other end is assembled to the roller unit 16 toward the vehicle front-rear side. By being directly connected to each other, they are arranged in a curved state inside the slide door 14, that is, in a state having a slack. The cables 31 and 32 are smoothly guided between the drive unit 33 and the roller unit 16 along the outer casings 35 and 36.

  FIG. 4 is an arrow view showing the drive unit viewed from the direction of arrow A in FIG. 5 is a cross-sectional view taken along line BB in FIG. 4, and FIG. 6 is a cross-sectional view taken along line CC in FIG. FIG. 7 is an exploded perspective view of the drive unit.

  The drive unit 33 includes a motor 43 with a speed reduction mechanism that includes a motor main body (electric motor) 41 and a gear unit portion 42 that includes a speed reduction mechanism that reduces and transmits the rotation of the motor main body 41.

  As shown in FIG. 5, a brushed DC motor is used for the motor main body 41, and a motor shaft 44 provided in the motor main body 41 can rotate in the forward direction or the reverse direction. The motor main body 41 has a motor case (yoke) 45 formed into a bottomed cylindrical shape by pressing a thin steel plate or the like. On the inner peripheral surface of the motor case 45, a pair of arc-shaped permanent magnets 46 magnetized in the N-pole and S-pole toward the radially inner side are fixed so as to face each other. In addition, an armature 47 facing each permanent magnet 46 through a minute gap is accommodated inside the motor case 45, and one axial end portion of the motor shaft 44 penetrates and is fixed to the axis of the armature 47. Has been. By supplying a driving current to the armature coil 47a of the armature 47 via a pair of brushes 48 and a commutator 49, an electromagnetic force torque in the rotational direction is generated in the armature 47, and the motor shaft 44 is in a predetermined rotational direction. Driven at a rotational speed. The motor body 41 is attached to the gear frame 51 of the gear unit portion 42 on the opening side of the motor case 45.

  As shown in FIG. 6, the gear frame 51 is formed in a bottomed cylindrical shape that is opened by a resin material on a side orthogonal to the axial direction of the motor shaft 44 (outside of the passenger compartment, upward in FIG. 6). A clutch cover 52 that closes the opening of the gear frame 51 is attached to the frame 51. The gear frame 51 is integrally formed with a motor connection portion 51a to which the motor body 41 is attached. As shown in FIG. 5, the motor connecting portion 51a is opened to the motor body 41 side to accommodate the pair of brushes 48 and the commutator 49, and the motor connecting portion 51a and the motor case 45 abut each opening end face. In this state, the gear frame 51 and the motor case 45 are fixed by being fixed with the fastening screws 53. The other axial end of the motor shaft 44 is inserted into the gear frame 51, and a worm 44a having a spiral tooth portion is integrally formed on the outer peripheral surface of the other axial end of the motor shaft 44. ing.

  Inside the gear frame 51 is housed a worm wheel 54 which is located on the bottom wall 51b side of the gear frame 51 and meshes with the worm 44a. The worm wheel 54 is formed into a substantially disk shape by injection molding of a resin material, and has a tooth portion that meshes with the worm 44a on the outer peripheral surface thereof. An output shaft 55 extending in the axial direction of the gear frame 51 is inserted through the shaft center of the worm wheel 54, and the worm wheel 54 is supported so as to be rotatable relative to the output shaft 55. The output shaft 55 is supported on the gear frame 51 by bearings 56 and 57 fixed in the gear frame 51 so that the output shaft 55 can rotate relative to the gear frame 51. It protrudes through.

  The output of the motor main body 41 is transmitted to the output shaft 55 via the clutch mechanism 59 for intermittently connecting the output of the motor main body 41 after being decelerated by the speed reduction mechanism 58 composed of the worm 44a and the worm wheel 54. The clutch mechanism 59 is disposed on the opening side (clutch cover 52 side) of the gear frame 51 with respect to the worm wheel 54, and the axial base end portion of the output shaft 55 is fixed to the clutch mechanism 59. When the sliding door 14 is manually opened and closed, the power transmission path between the worm wheel 54 and the output shaft 55 is interrupted by the clutch mechanism 59, and only the output shaft 55 is rotated without rotating the worm wheel 54 and the armature 47. It can be rotated.

  As shown in FIG. 7, a resin tensioner case 61 is attached to the motor 43 with a speed reduction mechanism so as to be positioned on the axial front end side of the output shaft 55. The tensioner case 61 is formed in a bottomed shape that opens on the opposite side of the motor 43 with a speed reduction mechanism, that is, on the front end side in the axial direction of the output shaft 55, and includes a drum housing portion 62 formed in a substantially cylindrical shape, A tensioner accommodating portion 63 extending in the radial direction from the accommodating portion 62 is provided. The tensioner case 61 is arranged so that the shaft center of the drum housing portion 62 is coaxial with the output shaft 55 and the tensioner housing portion 63 overlaps the motor case 45 in the axial direction of the output shaft 55. The fixing screw 64 is fixed to the gear frame 51.

  Inside the drum accommodating portion 62 of the tensioner case 61, a drum 65 around which the pair of cables 31 and 32 are wound is accommodated rotatably. The drum 65 is formed in a disk shape from a resin material, and a pair of cables 31 and 32 are wound around a spiral cable groove 65a formed on the outer peripheral surface thereof. At the axial center of the drum 65, an axial front end portion of the output shaft 55 that passes through the bottom wall portion 61a of the tensioner case 61 and protrudes into the drum housing portion 62 is fixed. 65 is rotated integrally.

  One end of the closed side cable 31 is fixed to one end in the axial direction of the drum 65 and is wound around the cable groove 65a on the one end side in the axial direction of the drum 65 so as to face the motor main body 41 side. Has been pulled out. On the other hand, one end of the open-side cable 32 is fixed to the other axial end of the drum 65 and is wound around the cable groove 65 a on the other axial end side of the drum 65, so On the other hand, it is drawn into the tensioner accommodating portion 63 so as to overlap with the axial direction of the output shaft 55.

  The pair of cables 31 and 32 are wound around the cable groove 65a of the drum 65 in opposite directions from one end to the other end, and are driven in opposite directions when the motor body 41 is operated. That is, when the drum 65 is rotated in the clockwise direction in FIG. 3, the open cable 32 is wound around the drum 65 and the closed cable 31 is sent out by the drum 65, so that the slide door 14 is opened. It is pulled automatically to automatically open. Conversely, when the drum 65 is rotated counterclockwise in FIG. 3, the closed cable 31 is wound around the drum 65 and the open cable 32 is sent out by the drum 65, so that the slide door 14 is moved. It will be pulled to the closing side and will automatically close.

  The tensioner accommodating portion 63 of the tensioner case 61 accommodates an outer push type close side tensioner mechanism 67a and an open side tensioner mechanism 67b that apply predetermined tension to the cables 31 and 32, respectively. , 32 are attached to the tensioner mechanisms 67a, 67b. FIG. 8 is an enlarged view showing the tensioner mechanism. 9 is an explanatory view showing the tensioner mechanism during the automatic opening operation, FIG. 10 is an explanatory view showing the tensioner mechanism during the automatic closing operation, and FIGS. 9 and 10 show a state in which a bracket 71 described later is removed. Show.

  As shown in FIG. 8, the end caps 37a and 37b attached to one ends of the outer casings 35 and 36 can be moved forward and backward within a predetermined stroke range along the cable 31 and 32 routing direction. Stroke grooves 68a and 68b are formed in the housing. The tensioner mechanisms 67 a and 67 b include coil springs 69 a and 69 b that urge the end caps 37 a and 37 b in a direction protruding from the tensioner accommodating portion 63, that is, in a direction away from the drum 65.

  As described above, since the outer casings 35 and 36 are arranged in a curved state between the drive unit 33 and the roller unit 16, the end caps 37a and 37b are moved into the stroke grooves 68a and 68b by the tensioner mechanisms 67a and 67b. Thus, the outer casing 35, 36 is swung in the vertical direction of the vehicle, and the outer casing length between the drive unit 33 and the roller unit 16 can be changed. That is, when the end caps 37a and 37b are urged by the coil springs 69a and 69b and protrude from the tensioner accommodating portion 63, the outer casings 35 and 36 are greatly curved, and the gap between the drive unit 33 and the roller unit 16 is increased. The outer casing length becomes longer. Conversely, when the end caps 37a and 37b enter the tensioner housing 63 against the urging force of the coil springs 69a and 69b, the outer casings 35 and 36 are less curved, and the drive unit 33 and the roller unit 16 The outer casing length between is shortened. Accordingly, when the end caps 37a and 37b are protruded from the tensioner case 61 by the tensioner mechanisms 67a and 67b, the outer casing length between the drive unit 33 and the roller unit 16 becomes long, that is, the total length of the cables 31 and 32. Therefore, a predetermined tension is applied to the cables 31 and 32 inserted into the outer casings 35 and 36.

  For example, as shown in FIG. 9, when the slide door 14 is automatically opened, the open-side outer casing 36 is urged by the open-side cable 32 wound around the drum 65 so that the outer casing length is shortened. The end cap 37b enters the tensioner housing 63 against the urging force of the coil spring 69b. Further, the closed side cable 31 delivered from the drum 65 has a closed side tensioner mechanism because the end cap 37a protrudes from the tensioner accommodating portion 63 by the biasing force of the coil spring 69a and the outer casing length of the closed side outer casing 35 becomes long. A predetermined tension is applied by 67a. Similarly, as shown in FIG. 10, during the automatic closing operation of the slide door 14, the closed outer cable 35 is urged by the closed cable 31 wound around the drum 65 so that the outer casing length is shortened. Therefore, the end cap 37a enters the tensioner accommodating portion 63 against the urging force of the coil spring 69a. Further, the open side cable 32 fed out from the drum 65 has the end cap 37b protruding from the tensioner accommodating portion 63 by the urging force of the coil spring 69b, and the outer casing length of the open side outer casing 36 becomes long. A predetermined tension is applied by 67b.

  Therefore, the cable lengths of the cables 31 and 32 routed between the drive unit 33 and both ends of the center rail 15 are changed by the center arm 19 being guided by the retracting portion 15b of the center rail 15 or the like. However, since the tension of the cables 31 and 32 is maintained by the tensioner mechanisms 67a and 67b, the cables 31 and 32 are not loosened. Thereby, the power slide device 30 can be operated smoothly.

  As shown in FIG. 7, a bracket 71 that closes the opening of the tensioner case 61 is attached to the tensioner case 61. The bracket 71 is formed into a predetermined shape by pressing a metal material such as a steel plate. The bracket 71 has a disc-shaped drum cover portion 71a that closes the opening portion of the drum housing portion 62, and an opening portion of the tensioner housing portion 63. A tensioner cover portion 71b to be closed and a plurality of attachment leg portions (attachment portions) 71c fixed to the door panel of the slide door 14 are provided. The bracket 71 is disposed on the opposite side of the tensioner case 61 from the motor 43 with a speed reduction mechanism, and is fixed to the fixing portion 51 c of the gear frame 51 by a fastening screw 72. That is, the motor 43 with a speed reduction mechanism is attached to one side of the tensioner case 61 in the axial direction of the output shaft 55, and the bracket 71 is attached to the other side of the tensioner case 61. The drive unit 33 is fixed to the door panel of the slide door 14 so that the pulling direction of the cables 31 and 32 from the drive unit 33 faces the roller unit 16 side at the mounting leg portion 71c of the bracket 71.

  FIG. 11 is a partially cutaway sectional view taken along the line DD in FIG. As shown in FIG. 11, the tensioner cover portion 71 b of the bracket 71 is provided with bead portions (convex portions) 74 a and 74 b that protrude toward the inside of the tensioner housing portion 63 of the tensioner case 61. The bead portions 74a and 74b are formed along the direction in which the cables 31 and 32 are routed, and the tensioner mechanisms 67a and 67b housed in the tensioner housing portion 63 are held by the bead portions 74a and 74b. As a result, rattling of the tensioner mechanisms 67a and 67b in the assembling direction is suppressed, the power slide device 30 can be operated smoothly, and generation of noise due to rattling of the tensioner mechanisms 67a and 67b is prevented. can do. Further, since the rigidity of the bracket 71 is improved by providing the bead portions 74a and 74b, it is possible to reduce the weight of the bracket 71 by reducing the thickness of the bracket 71 or by providing the hollow hole 75 in the bracket 71. It becomes.

  As described above, the opening of the tensioner case 61 is closed by the bracket 71 for fixing the drive unit 33 (the motor 43 with the speed reduction mechanism) to the door panel of the slide door 14. Therefore, the opening of the tensioner case is closed. Compared with the case where the tensioner cover and the bracket are formed separately, the number of parts of the drive unit 33 can be reduced and the assembling workability can be improved. Since the bracket 71 is attached to the tensioner case 61 on the side opposite to the motor 43 with speed reduction mechanism, the tensioner case 61 and the motor 43 with speed reduction mechanism are fixed to the bracket 71 in a state where they are assembled with each other. Is possible. As a result, the motor 43 with the speed reduction mechanism and the tensioner case 61 can be easily assembled to the bracket 71, and the assembly area to the bracket 71 can be reduced, and the drive unit 33 can be downsized.

  Furthermore, since the bracket 71 is attached to the tensioner case 61 on the side opposite to the motor 43 with the speed reduction mechanism, the assembly work of the bracket 71 can be made the final process when the drive unit 33 is manufactured. . Thereby, even when the shape of the mounting leg portion 71c of the bracket 71 is different for each vehicle type, the process up to the work for assembling the bracket 71 can be performed on the same production line, and the manufacture of the drive unit 33 is facilitated. .

  That is, for example, when the bracket is assembled between the motor with the speed reduction mechanism and the tensioner case, the assembly operation of the bracket needs to be an intermediate process when the drive unit is manufactured. Therefore, in the process after assembling the bracket, the shape difference of the mounting leg portion of the bracket must be considered, and the construction of the production line becomes complicated. On the other hand, as shown in FIG. 7, in the drive unit 33 assembled in the axial direction of the output shaft 55, the bracket 71 is arranged on the outer side in the axial direction of the output shaft 55. Thus, it is possible to construct a production line without considering the difference in the shape of the mounting leg portion 71c.

  In the present embodiment, the stroke of the end caps 37a and 37b is regulated by providing the stroke grooves 68a and 68b in the tensioner housing portion 63 of the tensioner case 61. However, the tensioner cover portion 71b of the bracket 71 is restricted. The end caps 37a and 37b may be shaped to restrict the stroke. However, the bracket 71 formed by pressing a metal material such as a steel plate can be simplified by providing the stroke grooves 68a and 68b in the tensioner accommodating portion 63 as in the present embodiment. 71 can be easily formed.

  As shown in FIG. 7, a waterproof cover 81 that covers the motor 43 with a speed reduction mechanism is attached to the motor 43 with a speed reduction mechanism. FIG. 12 is a perspective view showing how the waterproof cover and the motor with a speed reduction mechanism are attached. In addition, illustration of the waterproof cover 81 is abbreviate | omitted in FIGS.

  The waterproof cover 81 is formed of a resin material in an outer shape corresponding to the motor 43 with a speed reduction mechanism, and has a bottomed shape that accommodates the motor 43 with a speed reduction mechanism. The waterproof cover 81 is provided with a plurality of locking claws 82 that are locked to the gear frame 51 in a state where the motor 43 with a speed reduction mechanism is covered with the waterproof cover 81. It is formed in a wedge shape protruding toward the 43 side. The waterproof cover 81 is disposed on the side opposite to the tensioner case 61 side with respect to the motor 43 with a speed reduction mechanism, and is locked to the gear frame 51 by a locking claw 82 in the vicinity of the fixing portion 51c as shown in FIG. Yes. That is, the waterproof cover 81 is attached to one side of the motor 43 with a speed reduction mechanism in the axial direction of the output shaft 55, and the tensioner case 61 is attached to the other side of the motor 43 with a speed reduction mechanism. The waterproof cover 81 is formed with a cable insertion hole 83 for guiding the cables 31 and 32 routed from the tensioner case 61 to the outside of the waterproof cover 81. In the drive unit 33, rainwater or the like is prevented from entering the inside of the motor 43 with a speed reduction mechanism or the tensioner case 61 by the waterproof cover 81.

  Thus, since the locking claw 82 locked to the gear frame 51 of the motor 43 with a speed reduction mechanism is provided on the waterproof cover 81, the waterproof cover 81 can be easily assembled to the motor 43 with a speed reduction mechanism. The motor 43 with the speed reduction mechanism and the tensioner case 61 are assembled to the door panel of the slide door 14 while being sandwiched between the waterproof cover 81 and the bracket 71. As a result, the load applied to the bracket 71 can be distributed to the door panel via the waterproof cover 81, so that the bracket 71 can be thinned.

  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 drive unit 33 of the power slide device 30 with a built-in door, which is an embodiment of the present invention, has been described. May be applied. In the above-described embodiment, the brushed DC motor is used as the motor body 41. However, for example, another electric motor such as a brushless motor may be used.

  Furthermore, in the above-described embodiment, the drive unit 33 of the power slide device 30 according to an embodiment of the present invention has been described. However, the present invention is applied to the drive unit of other vehicle automatic opening / closing devices. Also good. In the above embodiment, a pair of cables 31 and 32 are used. However, both ends of one cable wound around the drum are respectively connected to the vicinity of the open end and the close end of the center rail. You may make it stop.

DESCRIPTION OF SYMBOLS 11 Vehicle 12 Car body 12a Concave part 13 Opening part 14 Sliding door (opening-closing body)
15 Center rail 15a Straight line portion 15b Pull-in portion 16 Roller unit 17 Bracket 18 Rotating shaft 19 Center arm 19a Roller mounting portion 20 Traveling roller 21 Guide rollers 22, 23 Roller unit 24 Upper rail 25 Lower rail 26 Cover member 30 Power slide device (automatic opening / closing) apparatus)
31 closed side cable 31a other end 32 open side cable 32a other end 33 drive unit 35 closed outer casing 36 open side outer casing 37a, 37b end cap 38 casing cap 39 pulley case 41 motor main body 42 gear unit portion 43 reduction mechanism Motor 44 motor shaft 44a worm 45 motor case 46 permanent magnet 47 armature 47a armature coil 48 brush 49 commutator 51 gear frame 51a motor connecting portion 51b bottom wall portion 51c fixing portion 52 clutch cover 53 fastening screw 54 worm wheel 55 output shaft 56, 57 Bearing 58 Deceleration mechanism 59 Clutch mechanism 61 Tensioner case 61a Bottom wall part 62 Drum housing part 63 Tensioner housing part 64 Fastening screw 65 Drum 65a Bull grooves 67a close side tensioner mechanism 67b open side tensioner mechanism 68a, 68b stroke grooves 69a, 69b coil spring 71 bracket 71a drum cover portion 71b tensioner cover portion 71c mounting leg (mounting portion)
72 Fastening screws 74a, 74b Bead part (convex part)
75 Mouth hole 81 Waterproof cover 82 Locking claw 83 Cable insertion hole

Claims (3)

An opening / closing body that opens and closes an opening provided in a vehicle body is provided on one of the vehicle body and the cable that is routed along the opening / closing direction of the opening / closing body to automatically open and close the opening / closing body. A drive unit for an automatic opening and closing device that opens and closes,
A motor with a speed reduction mechanism, comprising: a motor body; and a speed reduction mechanism that reduces the output of the motor body and transmits the output to the output shaft;
A tensioner case attached to the motor with the speed reduction mechanism and opening to the side opposite to the motor side with the speed reduction mechanism;
A drum housed in the tensioner case, fixed to the output shaft and wound around the cable;
A tensioner mechanism that is housed in the tensioner case and applies tension to the cable;
A mounting portion that is fixed to one of the opening and closing body and the vehicle body, and a bracket that closes the opening of the tensioner case;
The drive unit for an automatic opening / closing device, wherein the motor with a speed reduction mechanism is attached to one side of the tensioner case in the axial direction of the output shaft, and the bracket is attached to the other side of the tensioner case.   2. The drive unit for an automatic opening and closing device according to claim 1, wherein the bracket is provided with a convex portion projecting toward the tensioner case, and the tensioner mechanism housed in the tensioner case is pressed by the convex portion. Drive unit for the switchgear.   The drive unit of the automatic opening / closing apparatus according to claim 1 or 2, further comprising a waterproof cover that covers the motor with the speed reduction mechanism, and a locking claw that is locked to the motor with the speed reduction mechanism is provided on the waterproof cover. A drive unit for an automatic switchgear.

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