JP5375244B2 - Rotating machine and door drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary machine which can be compactly constituted not only in an axial direction but also in a direction orthogonal to the axis, which can obtain a properly assembled state through simple work, and which can secure a stable operation by avoiding the generation of an unbalanced moment load; and to provide a door driving unit using the rotary machine. <P>SOLUTION: This rotary machine includes: a rotor 11; a drum 2 which is arranged on the outer peripheral portion of the rotor 11 in such a manner that its axial center corresponds to the axial center m of the rotor 11; gear trains 3 and 4 in which a plurality of gears 32, 33, 34, 42, 43 and 44 are arranged between the drum 2 and the rotor 11 in such a manner as to operate around the axial center m; and a motor 1 which is constituted with the rotor 11 so as to apply a rotary power to the rotor 11. The rotary power input into the rotor 11 from the motor 1 is decelerated by the gear trains 3 and 4, and taken out from the drum 2. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rotating machine and a door drive device that can be suitably used as a door motor or the like through easy assembly and downsizing.

  A vehicle sliding door or the like generally does not include a drive source itself. For this reason, it is necessary to transmit the rotational output of the motor to the sliding door via the reduction gear.

  As such a sliding door driving device, for example, those shown in Patent Documents 1 and 2 are known.

  The slide door drive device of Patent Document 1 includes a cable that is fixed to the slide door to form a loop, and a drive unit that operates the cable to drive the slide door, and the drive unit connects the cable to the slide door. A winding drum that winds up, a disk-like motor that drives the winding drum, and a plurality of spur gears that are connected to the driving shaft of the motor and the winding shaft of the winding drum that protrude to the same side, respectively. A reduction gear train is provided, thereby reducing the size of the drive unit by eliminating the need for a conventional electromagnetic clutch, and reducing the thickness of the drive unit in the thickness direction by using a disk-like motor. . A low-speed, high-power motor is used as the motor, and the speed reducer is driven by a 24: 1 speed reducer to reduce friction and inertia of the conventional speed reducer and eliminate the need to disconnect the clutch during manual operation. I have to.

  The sliding door drive unit of Patent Document 2 is provided with a motor at one end of the base so that its output shaft is vertical, and at the other end of the base is an arm that is rotatable about an axis parallel to the output shaft of the motor. And is configured to decelerate and transmit the rotation of the output shaft of the motor to the first planetary gear mechanism disposed at the rotation center of the arm via the first rotation transmission mechanism. Lowering the overall height of the drive unit to reduce the vertical storage space occupied by the slide door drive unit, so that the problem of restrictions imposed by the height when the slide door drive unit is mounted on an automobile is resolved. Yes.

Japanese Patent No. 3324968 Japanese Patent No. 3120699

  However, in these patent documents, the shafts of the speed reducer (or the winding drum) and the motor are not coaxial, and are assembled to a plurality of parallel shafts. For this reason, there exists a malfunction that a motor unit becomes large by spreading in the direction orthogonal to the axis. In addition, if the shafts are different, high assembly accuracy and mounting strength are required to arrange and maintain the shafts in a predetermined positional relationship, and workability is significantly reduced. Furthermore, since a load that is biased in a direction perpendicular to the axis is applied to each axis, there is a problem that moment load increases and it is difficult to obtain a stable operation.

  In addition to the above, the one in Patent Document 2 has a large reduction ratio and cannot be operated manually unless the motor shaft is separated by a clutch. The one in Patent Document 1 also has a large inertia transmitted to the wire drum. This is accompanied by the problem of feeling heavy.

  The present invention has been made paying attention to these problems, and can be configured compactly both in the axial direction and in the direction perpendicular to the axis, and can be obtained in an appropriate assembled state through simple operations. Another object of the present invention is to realize a rotating machine and a door driving device using the same, which can prevent the generation of an unbalanced moment load and ensure a stable operation.

  In order to achieve this object, the present invention takes the following measures.

That is, the rotating machine of the present invention includes a case in which a boss hole is raised at the center of the bottom plate, a first rotating element that is rotatably supported on the outer peripheral side of the boss hole, and a support that protrudes from the bottom wall. A second rotating element disposed on the outer periphery of the first rotating element so that the axis is aligned with the axial center of the first rotating element by inserting a shaft into the inner peripheral side of the boss hole; and the second rotating element A gear train in which a plurality of gears are arranged so as to operate around the shaft center between the first rotating element and the first rotating element at an inner peripheral portion of the inner rotating portion, and rotational power is applied to any one of the rotating elements. And a motor configured with the rotating element. The rotating power input from the motor to one rotating element is shifted by a gear train and is extracted from the other rotating element.

  As described above, the shaft centers of the two rotating elements are made to coincide with each other, and the motor output is directly inputted to one of them, and the gears constituting the gear train are also operated around the shaft center. Since each element part is assembled around the shaft center, it is possible to realize a compact structure by reliably suppressing the spread in the direction perpendicular to the axis as compared with the conventional structure having a plurality of shaft centers. Further, since it is assembled on the same axis, the coaxiality can be easily obtained, and the operation becomes extremely easy. Furthermore, since the operation of each component part is supported on the same axis, a load is applied almost evenly around the axis, and the falling moment load acting on the axis is reduced, so that a stable operation can be obtained. Furthermore, by accommodating these motors and gear trains in the inner periphery of the second rotating element, it becomes easy to realize a configuration that is less bulky in the axial direction.

In order to suppress the tilting moment acting on the shaft center to a smaller value, at least a part of the first rotating element, the second rotating element, the gear train and the motor is provided so as to overlap in the axial direction. desirable.
In order to enable easy assembly, a part of the gear train is partly separated and a part of the gear is attached to the one rotating element side together with the motor, and the remaining gear is attached to the other rotating element side. It is preferable that the gears of the divided portions are connected to each other so that the gear train can be operated when both rotating elements are assembled in the axial direction.

  In order to realize simpler assembly, the gear train is divided into two, the first rotating element is the rotor constituting the motor, and the motor including this rotor is cased together with some gears constituting the gear train. On the other hand, the second rotating element is used as a drum, and the remaining gear is installed on the inner periphery of the drum. By assembling the case and the drum in the axial direction, the case-side gear and the drum-side gear at the dividing position are assembled. It is particularly preferable that the two can be engaged with each other.

  In order to make this rotating machine easy to handle and highly reliable, the drum has a bottomed cylindrical shape, and at least a part of the case has a cylindrical shape. It is desirable to form a machine room having a gear train.

  In the above configuration where the gear train on the case side and the gear train on the drum side are meshed when assembling the case and drum, to reduce the axial dimension, simplify assembly, and ensure manual operability from the load side The gear train is particularly preferably a planetary gear mechanism that includes a sun gear that rotates along with the rotor along with the case side and a ring gear that rotates along with the drum along with the drum side.

  In this case, in order to expand to an appropriate reduction ratio while maintaining a compact configuration, the planetary gear mechanism includes a first planetary gear train and a second planetary gear train that are adjacently arranged in the axial direction. And a planetary gear of the first stage planetary gear train and a connecting portion for interlockingly connecting the sun gear of the second stage planetary gear train, each gear of the first stage planetary gear train, and the second stage planetary gear. The sun gear and planetary gear of the row are provided on the case side, the ring gear of the second stage planetary gear row is provided on the drum side, and when the case and the drum are assembled, both planetary gear rows are arranged on the inner periphery of the drum. It is desirable to have such a configuration.

In this way, when assembling the case and drum, a rotating machine configured to mesh the gear train on the case side and the gear train on the drum side is used, and the gear train constituting the rotating machine can transmit power in the forward and reverse directions. In addition, the gear train can be operated from the motor side when the motor is operated and from the door side when the motor is not operated by winding a wire as an input end of the door to be driven around the drum constituting the rotating machine. by configuring the door drive device so as, to the vehicle housing or building wall compact integration is required, it becomes possible to built a narrower space than the conventional. For this reason, the degree of freedom of installation is improved, and a function for appropriately performing manual operation from the door side can be appropriately ensured in an emergency.

Further, an input terminal wire Ya door, this since the wire has a winding drum wound around the drum, the motor side, it is possible even for proper operation of any of the drum side.

  In this case, in order to realize an appropriate operational feeling, it is preferable that the inertia of the motor acting on the drum is set to 1/10 or less with respect to the door mass.

  Since the present invention has the above-described configuration, the axial dimension of the rotating machine and the direction orthogonal to the axis can be reduced in size and can be configured compactly. Assembling can also be performed by assembling each component part on the same axis. Thus, it is possible to provide an excellent rotating machine that can obtain high assembly accuracy through a simple structure, and can suppress the moment load acting from the load to be small and enables stable operation. Further, if a rotating machine is configured by meshing a part of the divided reduction gear train along the axial direction, a simpler assembly process can be realized.

The longitudinal cross-sectional view which shows a part of rotary machine which concerns on one Embodiment of this invention. The schematic diagram of the door drive device comprised by applying the rotary machine to a door. The typical top view which shows the structure of a planetary gear train. The longitudinal cross-sectional view corresponding to FIG. 1 which shows the state before an assembly. The figure which shows the modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A rotating machine RM of the present embodiment shown in FIG. 1 is used as a door motor with a speed reducer for driving a sliding door of an automobile, and a rotor 11 as a first rotating element disposed on an axis m. The drum 2 that is the second rotating element disposed on the outer periphery of the rotor 11 with the axis m matched, and a plurality of drums 2 between the drum 2 and the rotor 11 in the inner periphery of the drum 2 A planetary gear mechanism A having a first-stage planetary gear train 3 and a second-stage planetary gear train 4 constituted by arranging gears so as to operate around the axis m, and rotating on the rotor 11 The motor 1 including the rotor 11 is incorporated between the drum 2 and the case 5 so as to apply power. Then, the rotational power applied to the rotor 11 in the motor 1 is decelerated by both the gear trains 3 and 4 and taken out from the drum 2, and the wire 6 which is a track element for driving the door D shown in FIG. Is configured so that the drum 2 serves as a take-up drum. The wire 6 may be an endless track or a finite track.

  A case 5 shown in FIG. 1 has a boss hole 52 erected along the axis m from the center of a bottom plate 51 having at least a part of a cylindrical shape. A peripheral wall 53 is erected on the outer periphery of the bottom plate 51. .

  The drum 2 has a bottomed cylindrical shape in which the bottom wall 21 and the cylindrical portion 22 are integrally formed, and the support shaft 23 extends from the bottom wall 21 along the axis m toward the boss hole 52 of the case 5. It is protruding.

  The support shaft 23 of the drum 2 is inserted into the boss hole 52 of the case 5 to constitute a slide bearing. In this state, the peripheral wall 53 of the case 5 is accommodated inside the cylindrical portion 22 of the drum 2, and the dimensional relationship is set so that almost the entire case 5 fits in the inner peripheral portion of the drum 2. In this embodiment, the support shaft 23 is accommodated in the boss hole 52. However, it is also possible to connect the rotation sensor such as an encoder by projecting from the boss hole 52 and measure the rotation speed in a space-saving manner. is there.

  The first-stage planetary gear train 3 includes a first sun gear 32 supported on the outer periphery of the boss hole 52 of the case 5 via a bearing 31 and a first sun gear 32 attached to the inner surface of the peripheral wall 53 of the case 5 in a circular manner. The ring gear 33 and the first sun gear 32 and the first planetary gear 34 arranged so as to mesh with the first ring gear 33 simultaneously are constituted. The first sun gear 32 and the first planetary gear 34 are spur gears, and the first ring gear 33 is a flat internal gear. The first planetary gears 34 of this embodiment are arranged at four equiangular positions along the circumference as shown in FIG. 3, but the number is not limited to this. Further, the type of gear is not limited to a spur gear, and may be another gear such as a helical gear. If the gear operates as a gear, for example, a combination of rollers without teeth may be combined. A configuration in which the gear is operated by friction may be used.

  The second stage planetary gear train 4 shown in FIG. 1 is configured at a position displaced in the axial center m direction with respect to the first stage planetary gear train 3, and is formed on the outer periphery of the boss hole 52 of the case 5. The second sun gear 42 supported via the bearing 41, the second ring gear 43 attached to the inner surface of the cylindrical portion 22 of the drum 2, and the second sun gear 42 and the second ring gear 43 so as to mesh simultaneously. And a second planetary gear 44 disposed on the surface. The second sun gear 32 and the second planetary gear 44 are spur gears, and the second ring gear 43 is a flat internal gear. The second planetary gears 44 are also arranged at four equiangular positions along the circumference as shown in FIG. 3, but the number and type are not limited to this. FIG. 3 merely shows the configuration of the planetary gear trains 3 and 4 in the same diagram for convenience, and does not show the size or phase relationship between them.

  The first planetary gear 34 shown in FIG. 1 is connected to the second sun gear 42 via a connecting portion j that also serves as a retainer. It is configured to be synchronized. The second planetary gear 44 is supported by the support member s protruding from the peripheral wall 52 of the case 5 and is rotatably held at the four equiangular positions.

  The motor 1 includes a thin donut-shaped rotor 11 whose central portion is connected to the first sun gear 32 so as not to interfere with the operation of the first stage planetary gear train 3, and the outer periphery of the rotor 11. From the stator 12 configured along the circumferential direction on the inner surface of the peripheral wall 53 of the facing case 5, and the excitation means 13 for applying a magnetic field to the magnetic portion 13 b formed on the outer periphery of the rotor 11 by the coil 13 a wound around the stator 12. It is a disk-shaped motor comprised. The magnet of the magnetic part 13b in this embodiment is a rare earth magnet (sintered or bonded).

  In the state before the assembly of the rotating machine RM shown in FIG. 4, a part of the planetary gear mechanism A is divided, the motor 1 including the rotor 11, the first sun gear 32 of the first stage planetary gear train 3, the first The planetary 34 gear, the first ring gear 33, the second sun gear 42 and the second planetary gear 44 of the second stage planetary gear train 4 are incorporated on the case 5 side, and the second ring gear 43 of the second planetary gear train 4 is constructed. It is incorporated on the drum 2 side. Then, by assembling the case 5 and the drum 2 in the direction of the axis m along the arrow in the drawing, the second planetary gear 44 on the case 5 side and the second ring gear 43 on the drum 2 side at the dividing position are engaged with each other. I have to. In the assembled state of FIG. 1, a flat machine room M having a motor 1 and gear trains 3 and 4 is formed between the case 5 and the drum 2 in a substantially closed state, and the bottom plate 51 of the case 5 is at least In order to attach to the door D, which is a driving object, and to prevent the smooth rotation of the drum 2, the drum 2 protrudes from the drum 2 to the outside.

  That is, when rotational power is applied to the rotor 11 of the motor 1, the first sun gear 32 rotates. At this time, the first planetary gear 34 performs planetary motion with the first ring gear 33 and rotates to the second sun gear 42. Enter. The second sun gear 42 rotates the second planetary gear 44 held at a fixed position, and the second ring gear 43 meshing with the second planetary gear 44 is rotationally driven to extract the rotational output to the drum 2. The rotation is decelerated by the first planetary gear train 3 and the rotation is also decelerated by the second planetary gear train 4. The overall reduction ratio is a value obtained by multiplying the reduction ratios of these planetary gear trains 3 and 4. It becomes. Therefore, the wire 6 shown in FIG. 2 drives the door D at an appropriate speed.

  On the other hand, when power cannot be supplied to the motor 1 for some reason, if a manual operation is performed from the drum 2 side through the door D, the second ring gear 43, the second planetary gear 44, the second sun gear 42, the second The drum 2 is allowed to rotate while rotating in the order of the first planetary gear 34 and the first sun gear 32. The speed ratio at this time is the reciprocal of the speed reduction ratio.

  That is, if the case 5 of the rotating machine RM is installed in an appropriate part of the body of the automobile and the wire 6 that is the input end of the door D is wound around the drum 2, the motor 1 is operated from the motor 1 side when the motor 1 is operated. The gear trains 3 and 4 can be actuated from the door D side when not actuated.

  In the above, the condition that the moment of inertia of the magnetic portion 13b (rotor) of the motor and the reduction gear ratio of the planetary gear mechanism A is 1/10 or less of the door mass when converted from the diameter of the drum 2 to the drum 2 is established. Are combined.

  As described above, the rotating machine RM of the present embodiment includes the rotor 11 that is the first rotating element, and the second center disposed on the outer peripheral portion of the rotor 11 with the axis aligned with the axis m of the rotor 11. A plurality of gears 32, 33, 34, 42, 43, 44 are operated around the axis m between the drum 2 and the rotor 11 in the inner peripheral portion of the drum 2 that is a rotating element. Rotational power input from the motor 1 to the rotor 11, including the arranged gear trains 3 and 4, and the motor 1 configured with the rotor 11 so as to apply rotational power to the rotor 11 of the rotating elements. Is decelerated by the gear trains 3 and 4 and is taken out from the drum 2.

  In this way, the rotor 11 which is the two rotating elements and the axis m of the drum 2 are matched to give the rotor 11 the rotational power of the motor 1, and the gears 32, 33, 34 constituting the gear trains 3, 4. , 42, 43, and 44 are rotated, revolved, or relatively revolved around the axis m, and each element part is assembled around one axis m as a whole. For this reason, as compared with the conventional configuration including a plurality of shaft centers, it is possible to reliably suppress the spread in the direction orthogonal to the shaft center m and to realize a compact configuration. Further, by assembling each element part on the same axis m, it becomes easy to obtain the coaxiality, and the work becomes very easy. Furthermore, since the operation of each component is supported on the same axis m, a load is applied almost evenly around the axis m, and the falling moment load acting on the axis m is reduced to obtain a stable operation. Can do. Furthermore, since the motor 1 and the gear trains 3 and 4 are built in the drum 2, it is possible to realize a configuration with less bulk in the axial center m direction.

  In particular, since the rotor 11, the drum 2, the gear trains 3, 4 and the motor 13 are provided so as to overlap each other in the direction of the axis m, the load from the rotor 11 and the load from the drum 2 are By avoiding acting on different positions, the falling moment can be suppressed to a smaller value.

  Further, in a state where a part of the gear trains 3 and 4 is divided, some of the gears 32, 33, 34, 42 and 44 are attached to the rotor 11 side together with the motor 1, and the remaining gear 43 is attached to the drum 2 side. When the rotor 11 and the drum 2 are assembled in the direction of the axial center m, the second planetary gear 44 and the second ring gear 43 at the divided portion are connected so that the entire gear trains 3 and 4 can be operated. As a result, the assembly can be easily performed while the axis m is projected.

  Specifically, the gears 32, 33, 34, 42, and 44 are incorporated into the case 5 together with the rotor 11 and the motor 1, and the case 5 is assembled to the drum 2 along the axial center m direction. The gears 32, 33, 34, 42, 44 can be handled together with the rotor 11 and the motor 1, and when the case 5 is assembled to the drum 2, the gears 5, 33, 34, 42, 44 are engaged with each other on the case 5 side. Since only the second planetary gear 44 and the second ring gear 43 on the drum 2 side are provided, the assembly can be performed more simply.

  Further, the drum 2 has a bottomed cylindrical shape, and the case 5 has a bottom plate 51. By assembling these, a machine room M having the motor 1 and the gear trains 3 and 4 between them is formed. Therefore, handling of the rotating machine RM integrated in this way becomes convenient, and dust and the like can be prevented from entering the machine room M, and the reliability can be effectively increased.

  In particular, the planetary gear mechanism in which the gear train includes a first sun gear 32 that rotates along with the rotor 11 along with the case 5 and a second ring gear 43 that rotates along with the drum 2 along with the drum 2 side. Since the planetary gear mechanism A can be configured using a spur gear or the like, the dimension in the axial center m direction can be effectively suppressed, and it is easy to assemble in the axial center m direction. If the planetary gear mechanism A is also used, the manual operation can be easily performed.

  More specifically, the planetary gear mechanism A includes a first stage planetary gear train 3 and a second stage planetary gear train 4 that are arranged adjacent to each other in the direction of the axis m, and a planetary gear of the first stage planetary gear train 3. 34 and a connecting portion j for connecting the sun gear 42 of the second stage planetary gear train 4 so as to be interlocked with each other, the gears 32, 33, 34 of the first planetary gear train 3 and the second planetary gear train. 4 and the planetary gear 44 are provided on the case 5 side, the ring gear 43 of the second stage planetary gear train 4 is provided on the drum 2 side, and when the case 5 and the drum 2 are assembled, both planetary gear trains 3, 4 is arranged on the inner peripheral portion of the drum 2, so that appropriate deceleration can be achieved without suppressing the bulk in the direction of the axis m and without expanding the system in the direction perpendicular to the axis m. Can be expanded to a ratio.

The planetary gear trains 3 and 4 constituting the rotating machine RM can transmit power in the forward and reverse directions, and the drum 2 constituting the rotating machine RM is driven at the input end of the door D to be driven. The rotating machine RM is configured to be small and light so that the gear trains 3 and 4 can be operated from the motor 1 side when the motor 1 is operated and from the door D side when the motor 1 is not operated. As a result, it is possible to install in a narrower space compared to the conventional case in a vehicle housing that requires compact installation, and the degree of freedom of installation is improved. The function to perform can be secured appropriately.
The input end of the door D is a wire 6 that is a track element, and this wire is wound around the drum 2 to form the take-up drum 2, so that the wire 6 can be appropriately driven from the drum 2 and the planet Combined with the gear mechanism A, when manual operation is performed from the drum 2 side in the event of a power failure, only the inertia of the door D and the frictional force of the wire 6 can be used to facilitate manual operation. become able to.

  Furthermore, since the inertia of the motor 1 acting on the drum 2 is set to be 1/10 or less with respect to the door mass, a state where the manual operation from the door D side can be appropriately performed in an area where it does not feel heavy. Can be realized.

  In addition to the above-described effects, the rotating machine RM of the present embodiment can be made smaller than the reduction ratio of the conventional configuration, so that the transmission efficiency of the force from the motor 1 to the wire 6 is improved, and the reduction ratio is small, so the noise is low. There are various effects such as low power consumption during driving, small reduction ratio and easy rotation of the drum 2, facilitating the construction of the wire 6 and the low number of parts due to the absence of clutches. Can play.

  The specific configuration of each unit is not limited to the above-described embodiment.

  FIG. 5 schematically shows the arrangement of the drum 2, the planetary gear mechanism A, and the motor 1. FIG. 5A shows a planetary gear on the rotational axis m of the rotor 11 that is a component of the motor 1. The operation center of A is arranged, and these are accommodated in the inner peripheral part of the drum 2 arranged coaxially, and the above-described embodiment also belongs to this form. However, the planetary gear train may be one stage. Further, as shown in FIG. 5B, the motor 1 having the planetary gear mechanism A in itself may be accommodated in the inner peripheral portion of the drum 2 with the axis m aligned. Further, as shown in FIG. 3C, the motor 1, the planetary gear mechanism A, and the drum 2 are arranged in a plane with substantially the same thickness with the axis m aligned in the radial direction from the axis m. It is also effective to configure this. Furthermore, as shown in FIG. 4D, the motor 1 is nested within the thickness of the planetary gear mechanism A, and the planetary gear mechanism A is formed in a planar shape with a substantially equal thickness on the inner periphery of the drum 2. It is also effective to accommodate it. Of course, these axes m are matched.

  In any case, it is obvious from the figure that a part of the planetary gear mechanism A can be divided and the motor 1 and the drum 2 can be assembled in the direction of the axis m. By assembling the parts, it is possible to obtain effects such as ease of assembly, improved coaxiality, and improved operational stability.

  Furthermore, the drive object may be a door of a building structure other than the sliding door of the vehicle, and can be effectively applied to a drive object having many restrictions on the installation space other than the door.

  As a modified example other than the above, the support shaft 23 and the boss hole 52 may be supported via a rolling bearing. It is also effective to use a low-speed large-torque ultrasonic motor 1 as the motor 1. Further, the track element can be configured using a belt or a chain in addition to the wire. Furthermore, in the above embodiment, rotational power is applied from the motor 1 to the rotor 11 that is the first rotating element, and the rotational output is extracted from the drum 2 that is the second rotating element. It is also possible to apply the rotational power from the first rotational element and extract the rotational output from the first rotational element.

  Other configurations can be variously modified without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Motor 2 ... 2nd rotation element (drum)
3 ... Planetary gear train in the first stage 4 ... Planetary gear train in the second stage 5 ... Case 6 ... Input end (wire)
11: First rotating element (rotor)
D ... Door m ... Axis center M ... Machine room

Claims (6)

A case in which a boss hole is erected at the center of the bottom plate, a first rotating element that is rotatably supported on the outer peripheral side of the boss hole, and a support shaft that protrudes from the bottom wall on the inner peripheral side of the boss hole And the second rotating element disposed on the outer peripheral portion thereof so that the axis coincides with the axial center of the first rotating element, and the second rotating element at the inner peripheral portion of the second rotating element. A gear train in which a plurality of gears are arranged so as to operate around the axis between the rotating element and the first rotating element, and to apply rotational power to any one of the rotating elements. A rotating machine comprising: a motor configured with a rotating element, wherein the rotating power input from the motor to one rotating element is shifted by a gear train and extracted from the other rotating element. The rotating machine according to claim 1, wherein at least a part of the first rotating element, the second rotating element, the gear train, and the motor are provided so as to overlap each other in the axial direction. In a state where a part of the gear train is divided, some gears are attached to the one rotating element side together with the motor, and the remaining gears are attached to the other rotating element side so that both rotating elements can be connected to the shaft. The rotating machine according to claim 1 or 2, wherein when assembled in a central direction, the gears of the divided portions are connected to each other so that the gear train can be operated. The gear train is divided into two, and the first rotating element as a rotor constituting the motor is incorporated into the case together with a part of the gear constituting the gear train, while the second rotating element is used as a drum. 4. The remaining gear is assembled on the inner periphery of the drum, and the case and the drum are assembled in the axial direction so that the case-side gear and the drum-side gear at the dividing position can be engaged with each other. Rotating machine. 5. The drum has a bottomed cylindrical shape, and at least a part of the case has a cylindrical shape. By assembling them, a machine room having a motor and a gear train is formed between the two. Rotating machine. A utilizes the rotary machine according to any claim 4 or 5, together with the gear train constituting the rotary machine can be power transmission in forward and reverse directions, driven to the drum constituting the rotating machine The door drive device is configured to be able to operate the gear train from the motor side when the motor is operated and from the door side when the motor is not operated by winding a wire as an input end of the door. .

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