JP2012097486A - Door driving device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door driving device for a vehicle capable of reducing the number of components and simplifying a structure.SOLUTION: The door driving device for a vehicle includes a planetary gear mechanism G1 comprising a sun gear 38d, a ring gear 39b surrounding the sun gear 38d, a planetary gear 41 engaged with the sun gear 38d and the ring gear 39b and a carrier revolving with the planetary gear 41. By turning the sun gear 38d to a drive shaft to be rotationally driven by a motor 22, turning the carrier to a driven shaft and turning the ring gear 39b to a fixed shaft, the driving device decelerates the rotation of the motor 22, transmits it to a drum 23 as an output member to rotate it, and opens/closes a vehicle door. In such a door driving device for a vehicle, by attaching a planetary shaft 42 to a bottom wall part 23a of the drum 23 and supporting the planetary gear 41 on the shaft 42, the bottom wall part 23a is made to function as the carrier.

Description

  The present invention relates to a vehicle door drive device that drives a vehicle door that opens and closes a door opening formed in a vehicle body.

  Conventionally, various types of vehicle door drive devices have been proposed. For example, in the vehicle door drive device described in Patent Document 1, the vehicle door is movably supported by a guide rail (3) fixed to the vehicle body side. The drive device includes a drive unit (6) fixed to the vehicle door side and a cable (7) selectively wound and fed by the drive unit. Both ends of the cable are connected to guide rails. The front end and the rear end are respectively connected to the vehicle body side. Therefore, when the cable is selectively wound and fed out by the drive unit, the vehicle door is opened and closed.

  By the way, as a drive unit applicable to such a vehicle door drive device, for example, one described in Patent Document 2 is known. This drive unit employs a planetary gear mechanism as a speed reduction mechanism. As is well known, the planetary gear mechanism includes a sun gear, a ring gear that surrounds the sun gear, a plurality of planetary gears that mesh with the sun gear and the ring gear, and a carrier that revolves together with the planetary gear. In Patent Document 2, the sun gear directly connected to the rotating shaft of the motor is used as the driving shaft, the ring gear connected to the drum so as to be integrally rotatable is used as the driven shaft, and the rotation of the motor is performed at a reduction ratio using the carrier as the fixed shaft. Is communicating to. The vehicle door is opened and closed by winding and unwinding the cable as the drum rotates.

JP 2003-82927 A Special table 2009-523983

  When the planetary gear mechanism is used as a speed reduction mechanism, it is conceivable to use a sun gear as a drive shaft, a ring gear as a fixed shaft, and a carrier as a driven shaft, in addition to the one described in Patent Document 2.

  In this case, the sun gear is rotatably supported on the support shaft. Further, the drum and the carrier are coupled to the support shaft so as to be integrally rotatable. A planetary gear is rotatably supported by the carrier via a planetary shaft. Further, the ring gear is supported on the drum in a state in which the rotation is locked.

  In the above planetary gear mechanism, when the sun gear is rotationally driven by the motor, the rotation of the sun gear is transmitted to the planetary gear, and each planetary gear rotates (revolves) around the sun gear while rotating (spinning) around the planetary shaft. . The carrier revolves with these planetary gears. The revolution of the carrier is transmitted to the support shaft, and the support shaft rotates with the drum.

  However, in the above case, in order to transmit the revolution of the planetary gear to the drum, a carrier is used separately from the other components of the planetary gear mechanism, and this is provided so as to be integrally rotatable on the support shaft. The revolution of the carrier is transmitted to the drum via the support shaft. Therefore, the number of parts of the vehicle door driving device is increased by the amount of the carrier on the support shaft, and the structure of the driving device becomes complicated. These are obstacles to cost reduction and weight reduction of the vehicle door drive device.

Such a problem can also occur when the ring gear is used as a drive shaft, the sun gear is used as a fixed shaft, and the carrier is used as a driven shaft.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle door drive device capable of reducing the number of parts and simplifying the structure.

  In order to achieve the above object, the invention according to claim 1 is a planetary gear comprising a sun gear, a ring gear surrounding the sun gear, a planetary gear meshing with the sun gear and the ring gear, and a carrier that revolves together with the planetary gear. An output member that decelerates the rotation of the motor by using one of the sun gear and the ring gear as a drive shaft that is rotationally driven by a motor and the other as a fixed shaft and the carrier as a driven shaft. The output member is rotated and the output member is rotated to open and close the vehicle door, and the gist is that the carrier is constituted by a part of the output member.

  According to the above configuration, one of the sun gear and the ring gear in the planetary gear mechanism is the drive shaft, and the other is the fixed shaft. When the drive shaft is rotationally driven by the motor, the planetary gear meshed with the sun gear and the ring gear revolves around the sun gear while rotating as the drive shaft rotates. Here, in the invention described in claim 1, a part of the output member functions as a carrier. Therefore, when the planetary gear revolves around the sun gear, the carrier (output member) also rotates and the vehicle door is opened and closed. Therefore, since the revolution of the planetary gear is transmitted to the output member and rotated, it is not necessary to provide a separate carrier, and accordingly, the number of parts of the vehicle door driving device is reduced, and the structure is simplified.

  The invention according to claim 2 is the invention according to claim 1, wherein the output member includes a shaft attaching portion to which a planetary shaft supporting each planetary gear is attached, and the shaft attaching portion allows the output member to The gist is that the carrier is structured.

  According to the above configuration, when one of the sun gear and the ring gear in the planetary gear mechanism is used as a drive shaft and is driven to rotate by the motor, each planetary gear revolves around the sun gear while rotating around the planetary shaft. This revolution is transmitted to the shaft adherend through the planetary shaft. When this shaft adherent portion functions as a carrier, the output member including the shaft adherent portion rotates.

  According to a third aspect of the present invention, in the second aspect of the present invention, with respect to the planetary shaft for each planetary gear, a flange portion is formed at an end portion opposite to the end portion on the shaft adherent portion side. It is a summary.

  According to said structure, the planetary gear supported by the planetary shaft will be in the state pinched | interposed by the shaft attaching part of an output member, and the collar part of the planetary shaft, and the movement of the direction along the planetary shaft is controlled. . The planetary gear subjected to this restriction is held in mesh with the sun gear and the ring gear.

When the sun gear in the planetary gear mechanism is used as the drive shaft and the ring gear is used as the fixed shaft, the configuration of the invention described in claim 4 may be employed.
That is, the invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the sun gear is supported on a support shaft and is rotated by the motor. And the output member is supported at a location different from the input member on the support shaft, and the ring gear is on the input member and opposite to the output member with the sun gear interposed therebetween. It is formed in a lid portion supported at a location, and the planetary gear is disposed between the output member and the lid portion and meshed with the ring gear and the sun gear.

  According to the above configuration, in the planetary gear mechanism, the sun gear functions as a drive shaft and the ring gear functions as a fixed shaft. When the input member supported on the support shaft is rotationally driven by the motor, the sun gear formed on a part of the input member rotates.

At this time, the lid portion supported on the input member on the opposite side of the output member across the sun gear does not rotate. The ring gear formed on this lid also does not rotate.
As the sun gear rotates, the planetary gear disposed between the output member and the lid and meshed with the sun gear and the ring gear revolves around the sun gear while rotating. The output member that is supported at a location different from the input member on the support shaft and also has a function as a carrier rotates with the revolution of the planetary gear.

  According to the vehicle door drive device of the present invention, the number of parts can be reduced and the structure can be simplified.

The schematic diagram which shows the door drive device for vehicles in one Embodiment which actualized this invention. Sectional drawing along the AA line of FIG. The disassembled perspective view of the drive part of the door drive device for vehicles in one Embodiment. The front view which fractures | ruptures and shows a part about the drive part of the vehicle door drive device in one Embodiment. (A) is sectional drawing which followed the BB line of FIG. 4, (b) is sectional drawing which expands and shows the C section of (a). Explanatory drawing which shows the meshing relationship of a transmission gear and a pinion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a door opening 10 a is formed in a side portion of the vehicle body 10. On the side of the vehicle body 10, an upper rail 11 and a lower rail 12 are installed along the upper and lower edges of the door opening 10a. Further, the vehicle body 10 is provided with a center rail 13 extending in the front-rear direction in the quarter panel 10b behind the door opening 10a. A slide door 15 as a vehicle door is supported on the upper rail 11, the lower rail 12, and the center rail 13 via a guide roller unit 14 so as to be movable in the front-rear direction. The sliding door 15 opens and closes the door opening 10a as it moves in the front-rear direction.

  The center rail 13 is disposed at the vehicle height near the door belt line. And the cable guide 16 is installed in the quarter panel 10b along the lower edge of the center rail 13 over the full length.

  In the slide door 15, the drive unit 20 is fixed at a vehicle height near the door belt line, for example, by fastening using bolts and nuts. That is, as shown in FIG. 2, the drive unit 20 includes a door trim 17 that constitutes a door lining of the slide door 15 and a door inner panel 18 that constitutes a door inner plate in the door thickness direction (vehicle width direction). It is fixed to the door inner panel 18 so as to be sandwiched between them.

  Note that, at the mounting position of the drive unit 20, the door window glass DW that moves up and down inside the slide door 15 is disposed on the outer side (vehicle width direction outer side) than the door inner panel 18. That is, the drive unit 20 is disposed so as to overlap the door window glass DW at the vehicle height, but does not hinder the lifting / lowering operation of the door window glass DW.

  As shown in FIG. 1, the drive unit 20 includes a motor 22 composed of a brush motor and a drum 23 as an output member that is rotationally driven by the motor 22. A first cable 24 and a second cable 25 as rope members are wound around the drum 23. That is, each of the first cable 24 and the second cable 25 is wound around the drum 23 in a state where one end is locked to the drum 23. The first cable 24 and the second cable 25 are selectively wound and delivered by the drive unit 20.

  The drive unit 20 includes an intermediate pulley 26 as a pulley mechanism. Each of the first cable 24 and the second cable 25 is passed from the slide door 15 side to the vehicle body 10 side via the intermediate pulley 26 and the guide pulley 27 connected to the guide roller unit 14 that moves the center rail 13. It is routed along the guide 16 in the front-rear direction. The intermediate pulley 26 and the guide pulley 27 are disposed at the rear position of the drum 23 near the door belt line and further at the rear position thereof.

  The first cable 24 is guided by the cable guide 16 and routed to the front side, and is connected to the vehicle body 10 side on the front end side of the cable guide 16 via a tensioner 28 connected to the other terminal. It is connected by fastening with a nut. In addition, the second cable 25 is guided by the cable guide 16 and routed on the rear side, and via the tensioner 29 connected to the other terminal, on the vehicle body 10 side on the rear end side of the cable guide 16, for example, They are connected by fastening using bolts and nuts.

  In such a configuration, for example, when the second cable 25 is wound up while the first cable 24 is fed out by the drive unit 20, the slide door 15 moves rearward to open the door opening 10a. On the other hand, when the second cable 25 is fed out while winding the first cable 24 by the driving unit 20, the slide door 15 moves forward to close the door opening 10a.

  Note that when the extending direction of the first cable 24 and the second cable 25 wound and fed from the drum 23 coincides with the direction passed to the guide pulley 27, the intermediate pulley 26 may be omitted.

Next, the structure of the drive unit 20 will be further described.
As shown in FIGS. 3 to 5A and 5B, the drive unit 20 includes a case 30 that forms its outer shape and accommodates and supports various components. The case 30 includes a case main body 31 that forms an accommodation space for various components, and a first cover 32 and a second cover that respectively close the openings of the case main body 31 that open in opposite directions (vehicle width direction). 33 (see FIG. 3). The drive unit 20 is fixed and supported by the door inner panel 18 by fastening the case main body 31 to the door inner panel 18. In addition, each of the case main body 31, the 1st cover 32, and the 2nd cover 33 which are the structural members of the case 30 is shape | molded, for example with the resin material.

  The case main body 31 integrally includes a motor holder portion 31a, a gear housing portion 31b, a lever housing portion 31d, a substrate housing portion 31e, and a pair of pulley housing portions 31f and 31g. The motor holder portion 31a is disposed at the vehicle front side upper edge portion of the case main body 31, and the gear housing portion 31b has a substantially bottomed cylindrical shape, and is disposed adjacent to the vehicle rear lower side of the motor holder portion 31a. The lever accommodating portion 31d has a substantially bottomed cylindrical shape with a bottom, and is disposed adjacent to the vehicle rear side of the gear accommodating portion 31b. The substrate housing portion 31e has a covered cylindrical shape, and is disposed adjacent to the lower side of the gear housing portion 31b in a manner extending between the gear housing portion 31b and the lever housing portion 31d. Both pulley accommodating portions 31f and 31g are arranged in a state of being vertically arranged above the lever accommodating portion 31d and on the vehicle rear side of the gear accommodating portion 31b. In addition, the gear accommodating part 31b and the lever accommodating part 31d are connected in the aspect with which a part of circular cylinder part overlaps. Further, the pulley accommodating portions 31f and 31g communicate with the gear accommodating portion 31b, respectively.

  As shown in FIGS. 4 to 6, the motor 22 is assembled to the motor holder portion 31 a. The axis of the rotating shaft 22b of the motor 22 extends in a direction that is offset from the direction toward the center of the gear housing 31b. A pinion 34 is coupled to the rotary shaft 22b so as to be integrally rotatable. The pinion 34 is rotatably supported by a rolling bearing 35 with respect to the motor holder portion 31a. The pinion 34 is formed with two (even number of threads) threaded portions (a so-called high speed reduction helical gear with a small number of teeth) 34a. The number of strips of the pinion 34 may be an even strip of four or more strips, or may be an odd strip other than one strip.

  As shown in FIGS. 5A and 5B, the case main body 31 and the first cover 32 have a substantially cylindrical support shaft extending in the vehicle width direction (the vertical direction in FIGS. 5A and 5B). 36 is rotatably supported. More specifically, a circular bearing hole 31j is formed in the center of the bottom wall of the gear housing portion 31b. In addition, a circular bearing hole 32b is formed at a location facing the bearing hole 31j in the first cover 32. On the other hand, shaft portions 36 a and 36 b each having a substantially cylindrical shape are formed at both ends of the support shaft 36. The shaft portion 36a is pivotally supported by the bearing hole 31j, and the shaft portion 36b is pivotally supported by the bearing hole 32b.

  In the support shaft 36, serrations 36c are formed at locations different from locations where a transmission gear 38, which will be described later, is supported, here, at locations closer to the first cover 32 side than the shaft portion 36a. The drum 23 is connected to be integrally rotatable. That is, the drum 23 is formed in a substantially bottomed cylindrical shape that opens to the first cover 32 side. The drum 23 has a circular accommodation space S on the inner peripheral side thereof. An insertion hole 23b having a serration 23c passes through the center of the bottom wall 23a of the drum 23. The support shaft 36 is inserted into the insertion hole 23 b, and the serration 23 c of the drum 23 is engaged with the serration 36 c of the support shaft 36.

  In the support shaft 36, a portion adjacent to the shaft portion 36b is a shaft portion 36d having a larger diameter than the coaxial portion 36b. On the shaft portion 36d, a transmission gear 38 is rotatably supported as an input member that is rotationally driven by the motor 22. That is, the transmission gear 38 has a substantially cylindrical bearing portion 38 a at the center thereof, and this bearing portion 38 a is rotatably fitted on the shaft portion 36 d of the support shaft 36.

  As shown in FIGS. 5A, 5B, and 6, the transmission gear 38 extends from the end portion of the bearing portion 38a on the first cover 32 side to the radially outer side of the bearing portion 38a. It has a disk gear portion 38b that covers the open end face of the gear housing portion 31b. A plurality of teeth 38c arranged in an annular shape are formed on the outer peripheral edge of the disc gear portion 38b and on the surface facing the pinion 34 (the lower side of FIGS. 5A and 5B). Is formed. These tooth portions 38c are formed with a twist so as to mesh with the thread portion 34a of the pinion 34 in a rolling contact (line contact) state. Therefore, when the pinion 34 (screw portion 34a) rotates, the rotation is decelerated according to the ratio of the number of threads of the screw portion 34a and the number of teeth of the disk gear portion 38b and is transmitted to the transmission gear 38. Rotate.

If one of the screw part 34a and the disk gear part 38b is made of resin and the other is made of metal, abnormal noise is hardly generated.
As shown in FIGS. 3, 4 and 5A, 5B, a sun gear 38d is formed at a position adjacent to the serration 36c in the outer peripheral portion of the bearing portion 38a. In the outer peripheral portion of the bearing portion 38a, a portion closer to the first cover 32 than the sun gear 38d, that is, on the transmission gear (input member) 38, opposite to the drum 23 (output member) across the sun gear 38d ( A gear member 39 is rotatably supported on the portion of FIG. The gear member 39 has a substantially disk shape and includes a lid portion 39a that covers the opening end surface of the drum 23, and an annular ring gear 39b that projects from the lid portion 39a toward the drum 23 and surrounds the sun gear 38d. ing. A circular bearing hole 39c is formed at the center of the lid portion 39a. The lid 39a is rotatably fitted to the bearing 38a in the bearing hole 39c. A plurality of locking teeth 39d having a substantially triangular shape are formed on the outer peripheral portion of the lid portion 39a.

The ring gear 39 b is accommodated in the accommodation space S of the drum 23. Inner teeth are formed on the inner periphery of the ring gear 39b.
A plurality (three in this embodiment) of planetary gears 41 are disposed between the bottom wall portion 23a and the lid portion 39a of the drum 23 so as to be engaged with the sun gear 38d and the ring gear 39b of the transmission gear 38. That is, the bottom wall portion 23a of the drum 23 is used as a shaft attaching portion, and a plurality of mounting holes 23d are penetrated through the bottom wall portion 23a at equal angular intervals. Then, the end portions 42a of the plurality of planetary shafts 42 arranged in parallel to the support shaft 36 are inserted into the corresponding mounting holes 23d and locked so as not to fall off. The planetary gear 41 is rotatably supported on each planetary shaft 42.

  About the planetary shaft 42 for each planetary gear 41, a flange 42 c is formed at the end opposite to the end 42 a on the bottom wall 23 a side. And the planetary gear 41 is inserted | pinched from the both sides about the axial direction by this collar part 42c and the bottom wall part 23a. Each planetary gear 41 can rotate (revolve) around the sun gear 38 d while rotating (spinning) around the planetary shaft 42. The bottom wall portion 23 a (shaft adherence portion) to which the planetary shaft 42 is attached constitutes a carrier that revolves together with the planetary gear 41.

  As described above, the sun gear 38d, the ring gear 39b that surrounds the sun gear 38d, the planetary gear 41 that meshes with the sun gear 38d and the ring gear 39b, and the bottom wall portion 23a (shaft attachment portion) of the drum 23 that functions as a carrier that revolves together with the planetary gear 41. ) Constitutes a planetary gear mechanism G1 as a speed reduction mechanism.

  As shown in FIGS. 3 and 4, a switching lever 43 having a cam hole 43a is rotatably supported in the lever accommodating portion 31d. An engagement / disengagement block 44 is disposed between the switching lever 43 and the gear member 39 so as to be movable in the radial direction of the gear member 39. An engagement pin 44a provided on the engagement / disengagement block 44 is inserted through the cam hole 43a. The engagement / disengagement block 44 is formed with a plurality of locking teeth 44b that can be engaged with the locking teeth 39d of the gear member 39.

  Then, when the switching lever 43 is rotated, the position of the engagement pin 44a in the cam hole 43a changes, and the engagement / disengagement block 44 approaches or separates from the gear member 39. When the drum 22 is rotated by the motor 22 to open and close the slide door 15, the engagement / disengagement block 44 is pushed out to the gear member 39 side, and the engagement teeth 44 b mesh with the engagement teeth 39 d of the gear member 39. The gear member 39 is locked so as not to rotate.

  When the drum 23 is manually rotated to open and close the slide door 15, the engagement / disengagement block 44 is pulled back to the switching lever 43 side, and the engagement of the engagement teeth 44b with the engagement teeth 39d is released, The gear member 39 can rotate. 5A and 5B, only part of the switching lever 43 is shown.

  Pulleys 45 and 46 having different outer diameters are rotatably supported by the pulley accommodating portions 31f and 31g. Both pulleys 45 and 46 constitute the intermediate pulley 26 and are hung in such a manner that the first cable 24 and the second cable 25 wound and fed from the drum 23 are respectively guided. Both pulleys 45 and 46 pass the first cable 24 and the second cable 25 to the guide pulley 27 via a cable grommet 47 for dust prevention.

  An ECU (electronic control units) substrate (not shown) is accommodated in the substrate accommodating portion 31e. On the ECU board, an ECU mainly composed of a microcomputer is mounted.

The case body 31 is embedded with a bus bar (not shown) for electrically connecting the power feeding portion of the motor 22 held by the motor holder portion 31a and the ECU board.
As described above, the vehicle door drive device of the present embodiment is configured. Next, the operation of this vehicle door drive device will be described.

  When the locking teeth 44b of the engagement / disengagement block 44 are engaged with the locking teeth 39d and the motor 22 rotates while the ring gear 39b (gear member 39) is locked in a non-rotatable state, the rotation is caused by the pinion 34 and The first speed reduction is performed via the disk gear portion 38 b and transmitted to the transmission gear 38. Then, in the planetary gear mechanism G1, the rotation of the transmission gear 38 (disk gear portion 38b) uses the sun gear 38d of the transmission gear 38 as the drive shaft, the carrier (the bottom wall portion 23a of the drum 23) as the driven shaft, and the ring gear 39b as the drive shaft. A second speed reduction is performed at a reduction ratio of the fixed shaft and transmitted to the drum 23. That is, when the sun gear 38d is rotated along with the rotation of the transmission gear 38 (disk gear portion 38b), each planetary gear 41 meshed with the sun gear 38d and the ring gear 39b is connected to the bottom wall portion 23a (shaft attachment portion) of the drum 23. ) Around the sun gear 38d while rotating around the planetary shaft 42 attached to the sun gear 38d. With this revolution, the planetary shaft 42 is displaced around the sun gear 38d.

  Here, in this embodiment, the bottom wall part 23a which comprises a part of drum 23 functions as a carrier. Therefore, when the planetary gear 41 and the planetary shaft 42 revolve around the sun gear 38d as described above, a force to rotate the drum 23 is transmitted to the drum 23 through the bottom wall portion 23a. This force causes the drum 23 to rotate around the sun gear 38d.

  As described above, the rotation of the motor 22 is sufficiently decelerated through the pinion 34, the disk gear portion 38b, and the planetary gear mechanism G1, and is transmitted to the drum 23. As the drum 23 rotates, the first cable 24 and the second cable 25 are wound and fed, and the slide door 15 opens and closes. Accordingly, it is not necessary to separately provide a carrier in order to transmit the revolution of the planetary gear 41 to the drum 23 for rotation.

  Further, when the sliding door 15 is manually opened and closed in the above state where the ring gear 39b is locked so as not to rotate, even if the locking state of the ring gear 39b by the engagement / disengagement block 44 is maintained, the sliding door 15 The rotation of the drum 23 accompanying the opening / closing operation is efficiently transmitted in the planetary gear mechanism G1, the pinion 34, and the disk gear portion 38b. Therefore, it is possible to open and close the slide door 15 while rotating the motor 22 (rotating shaft 22b) and the like with a certain amount of operating force.

  On the other hand, when the sliding door 15 is manually opened and closed in a state where the engagement state of the ring gear 39b by the engagement / disengagement block 44 is released, the rotation of the drum 23 (carrier) accompanying this operation is the ring gear 39b (gear member 39) Is allowed while idling. In this way, the sliding door 15 can be opened and closed with a slight operating force by separating the rotational torque from the drum 23 side and the driving torque from the rotating shaft 22b side of the motor 22 by the engagement / disengagement block 44 or the like. .

  The planetary gear 41 supported by each planetary shaft 42 is sandwiched between the bottom wall portion 23a of the drum 23 and the flange portion 42c of the planetary shaft 42, and the movement in the direction along the planetary shaft 42 is restricted. The

According to the embodiment described in detail above, the following effects can be obtained.
(1) The sun gear 38d of the planetary gear mechanism G1 is used as a drive shaft that is rotationally driven by the motor 22, the ring gear 39b is used as a fixed shaft, and the carrier is used as a driven shaft. This is transmitted to the drum 23 as an output member, and the drum 23 is rotated to open and close the slide door 15. In the vehicle door drive device configured as described above, a carrier is configured by a part of the drum 23.

  Therefore, it is not necessary to separately provide a carrier in order to transmit the revolution of the planetary gear 41 to the drum 23 for rotation. Accordingly, the number of parts of the vehicle door driving device is reduced, and the structure is simplified. Accordingly, cost reduction and weight reduction can be achieved.

  The carriers are usually provided on both sides of the planetary shaft 42 in the axial direction. In this embodiment, since it is not necessary to provide this carrier, the drive unit 20 in the coaxial line direction can be downsized.

  (2) When a carrier is separately provided, the carrier is usually coupled to a support shaft together with the drum so as to be integrally rotatable. A sun gear is rotatably supported on the support shaft. A ring gear is supported on the drum in a state in which the rotation is locked.

  In the planetary gear mechanism having the above configuration, when the sun gear is driven to rotate by the motor, the rotation of the sun gear is transmitted to the planetary gear, and each planetary gear revolves around the sun gear while rotating. The carrier revolves with these planetary gears. The revolution of the carrier is once transmitted to the support shaft, and the support shaft rotates with the drum. Thus, the rotation of the carrier is transmitted to the drum via the support shaft.

  On the other hand, in this embodiment, a part of the drum 23 is caused to function as a carrier. Therefore, the rotation (revolution) of the planetary gear 41 can be directly transmitted to the drum 23 without using the support shaft 36.

  (3) The bottom wall portion 23a of the drum 23 is used as a shaft attachment portion, and the planetary shaft 42 is attached thereto. A planetary gear 41 is supported on each planetary shaft 42.

  By adopting such a configuration, when the revolution of each planetary gear 41 is transmitted to the bottom wall portion 23a through the planetary shaft 42, the drum including the bottom wall portion 23a is caused to function as the carrier. 23 can be rotated. As a result, the effects (1) and (2) can be obtained with certainty.

  Note that the configuration in which the planetary shaft 42 is attached to the bottom wall portion 23a as described above cannot be realized if the ring gear 39b is interposed between the bottom wall portion 23a and the planetary shaft 42. As in the present embodiment, the lid portion 39a is supported on the transmission gear 38 on the opposite side of the drum 23 across the sun gear 38d, and the ring gear 39b projects from the lid portion 39a to the drum 23 side. By doing so, the above-described configuration can be established. This is because a space for arranging the planetary shaft 42 and the planetary gear 41 is formed between the drum 23 and the lid portion 39a.

(4) With respect to the planetary shaft 42 for each planetary gear 41, a flange 42c is formed at the end opposite to the end 42a on the bottom wall 23a (shaft attached portion) side.
Therefore, the planetary gear 41 is sandwiched between the bottom wall portion 23a and the flange portion 42c to restrict the movement of the planetary gear 41 in the direction along the axis of the planetary shaft 42, and the planetary gear 41 is engaged with the sun gear 38d and the ring gear 39b. Can be held.

Note that the present invention can be embodied in another embodiment described below.
In the vehicle door drive device of the present invention, the ring gear 39b is a drive shaft that is rotationally driven by the motor 22, the carrier is the driven shaft, and the sun gear 38d is the fixed shaft, so that the rotation of the motor 22 is reduced. Also, the present invention can be applied to an apparatus that transmits and rotates the drum 23 as an output member to open and close the vehicle door.

  Also in this case, the planetary shaft 42 is directly attached to the bottom wall portion 23a of the drum 23, and the planetary gear 41 is supported on the planetary shaft 42 so that the bottom wall portion 23a functions as a carrier. By doing in this way, the effect | action and effect similar to the said embodiment are acquired.

  -You may fix the drive part 20 to the vehicle body 10 side. For example, when the drive unit 20 is mounted on the quarter panel 10b, it is more preferable to connect the tensioners 28 and 29 to the drive unit 20 side. Moreover, when mounting the drive part 20 in the step used as the step of the door opening 10a, it is more preferable to employ | adopt the belt pulley as an output member, and the belt as a rope member.

  As a mechanism for transmitting the rotation of the motor 22 to the transmission gear 38, a mechanism different from the above-described embodiment (face gear including the disk gear portion 38b and the pinion 34), for example, a combination of spur gears, a worm gear, or the like may be used. Good.

  The present invention is applicable not only to the sliding door 15 but also to a vehicle door driving device that opens and closes a hinged vehicle door.

  DESCRIPTION OF SYMBOLS 15 ... Sliding door (vehicle door), 22 ... Motor, 23 ... Drum (output member, carrier), 23a ... Bottom wall part (shaft adherence part), 36 ... Support shaft, 38 ... Transmission gear (input member), 38d DESCRIPTION OF SYMBOLS ... Sun gear (drive shaft), 39a ... Lid, 39b ... Ring gear (fixed shaft), 41 ... Planetary gear, 42 ... Planetary shaft, 42a ... End, 42c ... Gutter, G1 ... Planetary gear mechanism.

Claims (4)

A planetary gear mechanism comprising a sun gear, a ring gear surrounding the sun gear, a planetary gear meshing with the sun gear and the ring gear, and a carrier that revolves together with the planetary gear;
One of the sun gear and the ring gear is used as a drive shaft that is rotationally driven by a motor, the other is a fixed shaft, and the carrier is a driven shaft, so that the rotation of the motor is reduced and transmitted to the output member. A vehicle door drive device that rotates the output member to open and close the vehicle door,
The vehicle door driving apparatus, wherein the carrier is constituted by a part of the output member. 2. The vehicle door drive device according to claim 1, wherein the output member includes a shaft attaching portion to which a planetary shaft supporting each planetary gear is attached, and the carrier is configured by the shaft attaching portion. The vehicle door drive device according to claim 2, wherein the planetary shaft for each planetary gear has a flange formed at an end opposite to the end on the shaft adherence side. The sun gear is formed on a part of an input member that is supported on a support shaft and is rotationally driven by the motor,
The output member is supported at a location different from the input member on the support shaft,
The ring gear is formed on a lid portion that is supported on a portion on the input member opposite to the output member across the sun gear,
4. The vehicle door drive device according to claim 1, wherein the planetary gear is disposed between the output member and the lid portion and meshed with the ring gear and the sun gear. 5.

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