JP4917322B2 - Electric motor clutch mechanism - Google Patents

Description

  The present invention relates to a clutch mechanism of an electric motor provided in a driving unit that rotates a rotating drum around which a long object such as a shutter, a blind, or a curtain is wound by an electric motor.

  There has been proposed an electric winder that rotates a rotating drum around which a long object such as a shutter, a blind, or a curtain is wound by an electric motor. An example of an electric winding device will be described. A motor as a drive source is provided at one end in a cylindrical rotary drum, and the rotary drum is driven to rotate via a clutch mechanism linked to a motor shaft (output shaft). It is supposed to be. The clutch mechanism is configured to transmit a drive by assembling a clutch plate fitted to the output shaft and a sliding plate having a clutch pin engaged with the clutch plate into a case fitted integrally in the rotary drum. (See Patent Document 1).

  In addition, a reduction gear and a clutch mechanism are provided on one side in the axial direction of the electric motor to be connected to the output shaft (rotary drum), and a brake mechanism (electromagnetic brake) that operates in response to the start of the electric motor is provided on the other side in the axial direction. Yes. Alternatively, on one side in the axial direction of the electric motor, instead of the clutch mechanism, a planetary gear having a plurality of stages is connected to an output shaft (rotating drum) through a reduction clutch mechanism provided in the axial direction (see Patent Document 2). ).

  If the motor stops rotating due to a power failure or failure during operation, it is necessary to manually open or close the shutter, for example. In this case, in addition to the weight of the shutter itself, the clutch mechanism and the brake mechanism that connect the electric motor and the output shaft are operated and applied as a load, so workability is deteriorated. For this reason, various release mechanisms for releasing the drive transmission between the electric motor and the output shaft at the time of an emergency stop are provided.

For example, in Patent Document 1, a cable is inserted into the rotating drum from the other end side, which is an output side where a motor is provided on one end side in the rotating drum, and is linked to the sliding plate of the clutch mechanism. When the motor stops rotating, the sliding plate is slid in the axial direction through the cable to release the engagement between the clutch plate and the clutch pin, thereby disconnecting the connection with the motor shaft and enabling the rotating drum to rotate manually. Operation is enabled.
In Patent Document 2, the release arm connected to the release cable is operated, and the brake plate of the electromagnetic brake is first separated from the friction plate to release the electromagnetic brake, and then the torque applied to the output shaft is reduced to a predetermined torque or less. The motor is rotated until the torque is reduced, and when the torque becomes equal to or lower than the predetermined torque, the clutch plate is separated from the fixed plate connected to the output shaft, thereby enabling manual operation. Alternatively, the motor is rotated until the torque applied to the output shaft is reduced after the electromagnetic brake is released, and when the torque drops below the predetermined torque, the planetary gears connected to the output shaft are slid in the axial direction to output the output shaft. The manual operation is enabled by disengagement with.
JP 2002-138777 A Japanese Patent Laid-Open No. 11-200743

In each of the release mechanisms described above, according to the device configuration for releasing the clutch mechanism provided at the front end portion of the output shaft of Patent Document 1, an extremely large load is applied to the output shaft (motor shaft) of the electric motor. High strength is required for parts such as clutch plates and sliding plates. Therefore, if a clutch mechanism is provided on the output shaft of the speed reducer via the speed reducer, an expensive device is obtained.
In addition, since it is necessary to insert a cable from the end opposite to the motor provided on one end side in the rotating drum and to connect to the clutch mechanism on one end side, the length of the cable is increased, and in the rotating drum It is necessary to insert another drum into the drum and pass the cable through the drum so as not to get entangled with the assist spring (equilibration spring) provided.

In addition, the motor is rotated until the torque applied to the output shaft is reduced after the electromagnetic brake provided on the other side in the axial direction of the motor of Patent Document 2 is released. Since the resistance is increased on the output shaft side by the reduction gear (the rotational resistance increases by the reduction ratio), it is difficult to manually open and close the shutter and the like.
Also, once the meshing with the planetary gear output shaft (sun gear) of the reduction clutch mechanism is disengaged, the tooth position (circumferential tooth phase) will shift, so it will mesh even if the planetary gear is slid in the axial direction again. It is difficult. In order to realize this, a special shape and processing such as providing an introduction portion in the tooth shape of the sun gear and the planetary gear is required.

  The present invention has been made to solve these problems, and the object of the present invention is to reduce the load acting on the output shaft and to rotate without being affected by the rotational load of the motor during an emergency stop. An object of the present invention is to provide a clutch mechanism for an electric motor that can perform the above-described operation.

In order to achieve the above object, the present invention comprises the following arrangement.
In the clutch mechanism of an electric motor provided with a clutch mechanism that transmits the drive of the electric motor to the output shaft through the speed reducer between the electric motor and the speed reducer, a clutch groove is formed on the axial end surface on the speed reducer main body side. A clutch plate or an engagement portion that can be fitted in the clutch groove is provided in the housing portion that houses the sliding plate, and is provided to be slidable in the axial direction, and holds the axial position of the sliding plate. A cam mechanism is provided, and the cam mechanism decelerates by holding the position where the sliding plate approaches the reducer main body side on the outer periphery of the housing portion and the clutch pin or the engaging portion is fitted to the clutch groove. holding the state machine body is driven transmitted to the output shaft through the reduction gear from a fixed motor to the housing unit, the position where the sliding plate is Ru exits the spaced clutch pin or engaging portion clutch groove from the reduction gear side Reduction gear comprising a planetary gear mechanism in the power transmission from the power transmission cut off the output side of the motor side, characterized in that the obtaining switch the a state rotatable by.
Also, characterized in that it is connected is a wire to the slide plate from the shaft end side of the housing portion.
In the reduction gear, an internal gear that meshes with the sun gear provided on the motor shaft via the planetary gear is formed in at least one stage in the reduction gear body, and the output shaft is rotationally driven via the planetary gear that meshes with each internal gear. It is characterized by being.

If the above-described clutch release mechanism of the electric motor is used, an axial end face of the clutch main body fitted with the reduction gear main body is provided with a clutch mechanism that transmits the drive of the electric motor to the output shaft through the reduction gear between the electric motor and the reduction gear. A sliding plate with a clutch groove formed in the housing and a clutch pin projectingly provided on the housing portion housing the motor is slidable in the axial direction. By releasing the fitting into the groove, the reduction gear main body can rotate around the output shaft. Therefore, in the event of an emergency stop such as a motor failure or power failure, the power transmission to the motor is interrupted by the clutch mechanism and the speed reducer body is manually operated from the output side without disconnecting the gears of the speed reducer. Can be rotated around.
Further, the clutch mechanism is provided with a cam mechanism for holding the axial position of the sliding plate. The cam mechanism is arranged on the outer periphery of the housing portion so that the sliding plate comes close to the speed reducer main body and the clutch pin is the clutch. Power transmission / release from the motor side to the speed reducer with a simple configuration is achieved by holding the position where it fits in the groove and the position where the sliding plate is separated from the speed reducer body side and the clutch pin is pulled out of the clutch groove. Can be done.
In addition, since the wire is connected to the sliding plate from the shaft end side of the housing part, it is not necessary to take out the wire from the rotating output side, so the length of the wire can be shortened and the housing part does not rotate. Even if the wire passes through the inside and outside of the housing portion, it does not get entangled.
In the reduction gear, an internal gear that meshes with the sun gear provided on the motor shaft via the planetary gear is formed in at least one stage in the reduction gear body, and the output shaft is rotationally driven via the planetary gear that meshes with each internal gear. Therefore, in the event of an emergency stop, the speed reducer body can be manually operated from the output side without disengaging the gears by simply releasing the drive transmission of the clutch mechanism. Can be rotated around the output shaft.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best embodiment of a clutch release mechanism for an electric motor according to the present invention will be described with reference to the accompanying drawings. Below, the clutch release mechanism of the electric motor provided in the electric winding device for shutters will be described as an example. The electric winding device is integrally provided with a brake-equipped motor provided in a housing portion provided coaxially with the rotating drum, and a motor clutch mechanism in the rotating drum, and starts driving the motor and transmits drive to the output shaft through the clutch mechanism. Thus, the rotary drum is driven to rotate.

    First, with reference to FIG.4 and FIG.5, schematic structure of the electric winding apparatus for shutters is demonstrated. In FIG. 5, a shutter 2 is wound around a rotary drum 1 so as to be able to be fed out. An assist spring 4 is wound around a winding shaft 3 in the rotary drum 1. The assist spring 4 is provided so as to reduce load fluctuation when the shutter 2 is extended. The take-up shaft 3 is connected to the drive side output shaft 6 through a coupling 5.

  In FIG. 4, the drive unit 7 is provided in the rotary drum 1, and an electromagnetic brake 11, an electric motor (motor) 12, a clutch mechanism 13, and a speed reducer 14 are arranged in this order in the axial direction from the left end in the axial direction. The electromagnetic brake 11 and the electric motor 12 are disposed in the rotary drum 1 but are fixed to a mounting frame or the like. In FIG. 5, commercial power is supplied to the electromagnetic brake 11 and the electric motor 12 from the shaft end side of the rotary drum 1, and is connected to a switch 15 provided on a wall or the like. Further, a clutch operating wire 9 is drawn out and connected to the operating rod 10 at the shaft end (left end in FIG. 5) of the rotating drum 1.

Next, a more detailed configuration of the drive unit 7 will be described with reference to FIGS. 1 to 3.
The electromagnetic brake 11 is configured to release the brake in conjunction with the starting operation of the electric motor 12. In FIG. 3, the electric motor 12 is accommodated in the housing portion 22. A motor shaft 23 is rotatably supported on the housing portion 22. One end side of the motor shaft 23 is connected to the electromagnetic brake 11, and the other end side is connected to the speed reducer 14.

Next, the configuration of the clutch mechanism 13 will be described.
In FIG. 3, a cylindrical clutch main body 32 is integrally fitted on the outer periphery of a cylindrical reduction gear main body 33 that can rotate around the output shaft 6. Clutch grooves 34 are formed at a plurality of locations in the circumferential direction on the axial end surface of the clutch body 32. A sliding plate 35 is provided on the outer periphery of the housing portion 22 so as to be slidable in the axial direction. Clutch pins 36 protrude from the sliding plate 35 at a plurality of locations in the circumferential direction. In FIG. 1A, a first compression coil spring 37 is provided between the sliding plate 35 and the housing wall surface 22a, and the sliding plate 35 is always urged toward the clutch body 32 side. A front end side (right end side in FIG. 1A) of the housing portion 22 is inserted through the clutch body 32, and a bearing 38 is fitted on the outer periphery of the front end portion. The bearing 38 rotatably supports one end of the speed reducer main body 33.

The clutch mechanism 13 is provided with a cam mechanism that can change the axial position of the sliding plate 35. In FIG. 1A, a ring-shaped blocking plate (rotating cam) 39 is slidably provided adjacent to the sliding plate 35 on the outer periphery of the housing portion 22. The blocking plate 39 converts a force applied in the axial direction into a rotational force in the circumferential direction.
In FIG. 2, projections 39 a are provided at a plurality of locations in the circumferential direction in the shaft hole of the blocking plate 39. Each projection 39a is formed with a cam slope 39b having a uniform inclination. In addition, on the outer peripheral side of the blocking plate 39, blocking portions 39c are projected at a plurality of locations. The blocking portion 39c covers the clutch groove 34 and prevents the clutch pin 36 from entering when the blocking plate 39 rotates at a predetermined timing. A ring-shaped guide 40 is incorporated in the shaft hole of the blocking plate 39. In the shaft hole of the guide 40, a plurality of protrusions 40a are formed in the circumferential direction, and are engaged with the plurality of protrusions 22b formed on the outer periphery of the housing portion 22 so as to be slidable in the axial direction. A protruding surface 40b having a uniform inclination from the guide end protrudes from one end (left end in FIG. 2) in the axial direction of the protrusion 40a. When the blocking plate 39 and the guide 40 move relative to each other in the axial direction, the contact state between the cam inclined surface 39b and the protruding surface 40b changes, and the protruding surface 40b sequentially gets over the cam inclined surface 39b. Therefore, the blocking plate 39 is rotated by a predetermined amount in one direction.

  In FIG. 1A, a receiving member 41 is fixed to the outer periphery of the housing portion 22. A second compression coil spring 42 is interposed between the receiving member 41 and the guide 40. When the strengths of the first and second compression coil springs 37 and 42 are compared, the first compression coil spring 37 has a larger spring force at a predetermined position than the second compression coil spring 42. Therefore, the blocking plate 39 is pressed against the receiving member 41 by compressing the second compression coil spring 42 while being pressed against the guide 40 by the sliding plate 35. At this time, the clutch pin 36 of the sliding plate 35 is fitted into the clutch groove 34 so that the clutch mechanism 13 is connected.

  In FIG. 3, a U-shaped connector 43 is fixed to the sliding plate 35. In FIG. 2, the connector 43 is slidable toward the groove 22 c formed in the axial direction on the housing wall surface 22 a against the elastic force of the first compression coil spring 37. One end of the wire 9 is connected to the connector 43, and the other end of the wire 9 is taken out from the shaft end side of the housing portion 22 and connected to the operation rod 10 (see FIG. 5).

  When the operator pulls the wire 9 with the operating rod 10, the sliding plate 35 moves in the axial direction toward the housing portion 22 against the elastic force of the first compression coil spring 37 as shown in FIG. To do. At this time, the clutch pin 36 comes out of the clutch groove 34 and the coupling of the clutch mechanism 13 is released. Further, since the pressing force toward the right end in the axial direction by the first compression coil spring 37 is reduced, the blocking plate 39 is slightly pushed back toward the left end in the axial direction by the elastic force of the second compression coil spring 42. At this time, in FIG. 2, the blocking plate 39 moves in a direction away from the guide 40, so that it rotates by a predetermined amount along the cam inclined surface 39b so that the blocking portion 39c blocks the clutch groove 34 and stops at the position. It has become. When the clutch mechanism 13 is connected again, the blocking plate 39 is further rotated by moving the blocking plate 39c by pulling the wire 9 while holding the operating rod 10. As a result, the clutch pin 36 of the sliding plate 35 urged by the first compression coil spring 37 is re-fitted into the clutch groove 34 and the clutch mechanism 13 is connected.

  Next, the configuration of the speed reducer 14 will be described. In FIG. 3, a first sun gear 24 provided at the tip of the motor shaft 23, a first planetary gear 44 that meshes with the first sun gear 24, and the first planetary gear 33 in the speed reducer main body 33. A first internal gear 45 that meshes with the gear 44 is formed in the speed reducer main body 33. A cylindrical sleeve 46 is integrally assembled with the speed reducer main body 33. A plurality of internal gears (second internal gear 47 and third internal gear 48) are formed in the sleeve 46 in the axial direction. The output shaft 6 is rotatably supported in the sleeve 46. The second sun gear 49 meshes with the second internal gear 47 via the second planetary gear 51, and the third sun gear 50 communicates with the third internal gear 48 via the third planetary gear 52. I'm engaged.

  A second sun gear 49 is integrally assembled with the first carrier 56. A first pin 53 is supported on the first carrier 56 in parallel with the output shaft 6, and the first planetary gear 44 is rotatably supported on the first pin 53. The third sun gear 50 is integrally assembled with the second carrier 57. A second pin 54 is supported on the second carrier 57 in parallel with the output shaft 6, and the second planetary gear 51 is rotatably supported on the second pin 54. The third carrier 58 is assembled integrally with the output shaft 6. A third pin 55 is supported on the third carrier 58 in parallel with the output shaft 6, and the third planetary gear 52 is rotatably supported on the third pin 55.

  When the motor shaft 23 is rotationally driven, the first pin 53 (first carrier 56) is connected to the output shaft 6 through the first stage first sun gear 24, first planetary gear 44, and first internal gear 45. The second sun gear 49 rotates about the axis. When the second sun gear 49 rotates, the second pin 54 (second carrier 57) rotates around the axis of the output shaft 6 through the second planetary gear 51 and the second internal gear 47, and the third The sun gear 50 rotates. When the third sun gear 50 rotates, the output shaft 6 connected to the third pin 55 (third carrier 58) is rotated through the third planetary gear 52 and the third internal gear 48.

  In FIG. 3, when the motor 12 is activated by a remote control operation (not shown) or the like while the clutch mechanism 13 is in the connected state, the electromagnetic brake 11 is released and the motor shaft 23 rotates. At this time, since the output shaft 6 rotates through the planetary gear mechanism of the speed reducer 14, the rotary drum 1 shown in FIG. 5 can be rotated to feed out or wind up the shutter 2.

  In FIG. 3, when the electric motor 12 is stopped due to a power failure or failure, when the operating rod 10 is gripped and the wire 9 is pulled downward (see FIG. 5), the sliding plate 35 slides and the clutch pin Since 36 is disengaged from the clutch groove 34 (see FIG. 1B), the coupling between the clutch mechanism 13 and the speed reducer 14 is released. The reduction gear main body 33 is rotatably supported by the housing portion 22 via a bearing 38. Therefore, the speed reducer main body 33 can rotate around the output shaft 6.

  Therefore, without disengaging the gears of the speed reducer 14, the power transmission to the motor 12 side is interrupted by the clutch mechanism 13, and the speed reducer main body 33 and the sleeve 46 are moved by manual operation from the output side (shutter 2 side). It can be rotated around the output shaft 6. Thereby, since the rotating drum 1 rotates, the shutter 2 stopped halfway can be manually fed out or wound up with a light load.

Next, another example of the clutch mechanism of the electric motor will be described with reference to FIGS.
In FIG. 6, the layout configuration of the electric motor (motor) 12 housed in the motor case 61 will be described first. A reduction gear 62 is connected to the motor shaft 23 side of the motor 12 and is housed in a motor case 61. The reduction gear 62 uses a mysterious planetary gear mechanism described later. The reduction gear 62 is connected to the output shaft 6. The output shaft 6 extends outside the motor case 61. A clutch mechanism 63 is housed in a motor case 61 together with a clutch housing 64 on the opposite side of the motor 12 from the motor shaft 23.

  Next, the configuration of the speed reducer 62 will be described. In this embodiment, a mysterious planetary gear mechanism is used as the speed reducer 62. The mysterious planetary gear mechanism decelerates the power input from the input side (sun gear) through a plurality of planetary pinions and fixed internal gears and outputs it from the movable internal gear. In addition, it is difficult to transmit rotation from the output side to the input side. In this embodiment, a fixed internal gear 67 and a movable internal gear 68, which will be described later, form a speed reducer main body, and a clutch groove (rotation stop groove 67a) is formed on the axial end surface of the fixed internal gear 67. .

  Hereinafter, an example will be specifically described. In FIG. 6, the motor shaft 23 is connected to the shaft 65 in the axial direction. Gear teeth are formed on the outer periphery of the shaft 65 (sun gear 65). The sun gear 65 and the planetary gear (planetary pinion) 66 are engaged with each other. The planetary gears 66 mesh with the fixed internal gear 67 and the movable internal gear 68, respectively. The fixed internal gear 67 is connected to a clutch mechanism 63 described later, and the movable internal gear 68 is assembled integrally with the output shaft 6. The sun gear 65 and the planetary gear 66, and the planetary gear 66 and the fixed internal gear 67 mesh with each other to transmit power. However, a slight difference in the number of teeth is provided between the fixed internal gear 67 and the movable internal gear 68. Therefore, when power is transmitted from the motor shaft 23 to the output shaft 6, rolling contact is dominant in the power transmission in order for the planetary gear 66 to revolve around the sun gear 65 while meshing with the fixed internal gear 67. Therefore, power transmission is performed relatively efficiently. On the other hand, if the planetary gear 66 revolves around the sun gear 65 while meshing with the movable internal gear 68, the sliding contact becomes dominant in the power transmission, so the power transmission efficiency is lowered.

For this reason, even if an attempt is made to transmit power from the output shaft 6 side to the motor shaft 23 side, a large rotating force is required to transmit power from the movable internal gear 68 to the planetary gear 66, so that a braking action is obtained. That is, the power from the output shaft 6 side is absorbed by the movable internal gear 68 that meshes with the planetary gear (planetary pinion) 66 and is not transmitted to the motor shaft 23. Thus, since the braking action is obtained in the speed reducer 62 using the mysterious planetary gear mechanism, the electromagnetic brake can be omitted, the axial length of the winding device can be shortened, and the manufacturing cost can be kept low. Can do.
Therefore, by releasing the fixed state of the fixed internal gear 67 linked to the clutch mechanism 63, the movable internal gear 68 and the fixed internal gear 67 that mesh with the planetary gear (planetary pinion) 66 are also rotated by the power from the output shaft 6 side. Since it becomes easy, the brake action of the reduction gear 62 can be cancelled | released.

Next, the configuration of the clutch mechanism 63 will be described.
In FIG. 6, a pin 70 a on one side of the crank 70 is fitted in the clutch housing 64. The pin 70 b on the other side of the crank 70 is fitted in the cam groove 72 of the heart cam 71. A compression spring 73 is inserted between the crank 70 and the clutch housing 64. The compression spring 73 urges the crank pin 70 b to be inserted into the cam groove 72 of the heart cam 71. The heart cam 71 is slidably guided by both sides of the clutch housing 64.

  In FIG. 11, a fulcrum shaft 74 is provided on both sides of the motor case 61. A concave groove 75 a formed on one end side of the swing plate 75 is linked to the fulcrum shaft 74. A long hole 75 b is formed on the other end side of the swing plate 75. Shafts 76 (see FIG. 10) protruding from both side surfaces of the heart cam 71 are inserted into the long holes 75b. A shaft hole 75 c is provided in the middle of the swing plate 75. A shaft hole 69a is formed in the groove side of a clutch plate (sliding plate) 69 formed by bending it into a substantially U shape (U shape). On the open end side of the clutch plate 69, an engaging portion 69b that engages with a rotation preventing groove 67a (see FIG. 9) provided in the fixed internal gear 67 is formed.

  7 to 9, the clutch plate 69 is provided across the electric motor (motor) 12 along the outer peripheral surface of the motor case 61. The shaft 77 is fitted by overlapping the clutch holes 69 and the shaft holes 69 a and 75 c of the swing plate 75. When the heart cam 71 slides, the swing plate 75 swings about the fulcrum shaft 74, and the clutch plate 69 slides along the longitudinal direction of the motor case 61. 10, a part of the heart cam 71 is provided with a mounting hole 71a to which a wire 9 (see FIG. 5) connected to the operation rod 10 can be fastened. The crank pin 70b of the crank 70 is located at, for example, the arrow P position in FIG. 10 when the clutch is engaged, and is locked at the arrow Q position when the clutch is released. Steps are provided at a plurality of locations so that the pin 70b inserted into the cam groove 71 moves only in one direction when the heart cam 71 is pulled. In FIG. 6, the heart cam 71 is always urged by the compression spring 78 so as to be pushed into the clutch housing 64 (motor case 61).

Here, the clutch engagement / release operation will be described with reference to FIGS.
Fig.12 (a) shows the time of clutch connection. The heart cam 71 is drawn into the clutch housing 64 by the biasing force of the compression spring 78. At this time, the crank pin 70b is at the position of the arrow P in FIG. 10, and the swing plate 75 is tilted counterclockwise about the fulcrum shaft 74. For this reason, the engaging part 69b of the clutch plate 69 engages with the rotation preventing groove 67a of the fixed internal gear 67, and the rotation of the fixed internal gear 67 is restricted. In this state, even if power is applied from the output shaft 6 side, the speed reducer 62 has a braking action and cannot be turned.

  FIG. 12 (b) shows when the clutch is released. When the heart cam 71 is pulled in the direction of the arrow against the bias of the compression spring 78, the crank pin 70b moves and locks the cam groove 72 to the position of the arrow Q in FIG. Tilt clockwise around 74. For this reason, the engagement portion 69b of the clutch plate 69 is released from the engagement with the rotation preventing groove 67a of the fixed internal gear 67, and the rotation restriction of the fixed internal gear 67 is eliminated. In this state, even if power is applied from the output shaft 6 side, the brake action of the speed reducer 62 is eliminated, so that the movable internal gear 68 that meshes with the planetary gear (planet pinion) 66 can be rotated by the power from the output shaft 6 side. it can. In this way, it is possible to rotate while reducing the load acting on the output shaft 6 without being affected by the rotational load of the motor during an emergency stop.

  In this embodiment, the mysterious planetary gear mechanism is adopted for the speed reducer 62, but a planetary gear mechanism may be adopted. Further, although the heart cam 71 is used for the clutch mechanism 63, other mechanisms such as a rotating cam may be used.

  Although the above embodiment has been described with respect to the electric winding device for the shutter, it may be applied to a winding device for other long objects such as curtains, blinds, and awnings. The cam mechanism for releasing the coupling of the clutch mechanism 13 is not limited to the rotating cam (blocking plate 39) and the heart cam 71 that convert the axial pressing force into rotation, and other mechanisms may be used. The motor is not limited to a specific motor, and can be applied to various electric motors.

It is sectional explanatory drawing of the connection state and cancellation | release state of a clutch mechanism. It is a disassembled perspective view of a clutch mechanism. It is sectional drawing of the drive part of an electric winding apparatus. It is an external view of the drive part of an electric winding device. It is explanatory drawing which shows schematic structure of an electric shutter. It is sectional drawing of the drive part of the electric winding apparatus which concerns on another example. It is a front view of the electric winding apparatus of FIG. It is a bottom view of the electric winding apparatus of FIG. It is explanatory drawing which shows the connection structure of a clutch mechanism and a fixed internal gear. It is a perspective view of a heart cam. It is a disassembled perspective view which shows the assembly | attachment state to the motor case of a clutch mechanism. It is explanatory drawing which shows the connection state of the clutch mechanism and fixed internal gear at the time of clutch connection and a releasing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating drum 2 Shutter 3 Winding shaft 4 Assist spring 5 Coupling 6 Output shaft 7 Drive part 9 Wire 10 Operation rod 11 Electromagnetic brake 12 Electric motor (motor)
13, 63 Clutch mechanism 14, 62 Reducer 15 Switch 22 Housing portion 22a Housing wall surface 22b, 40a Projection 22c Groove 23 Motor shaft 24 First sun gear 32 Clutch main body 33 Decelerator main body 34 Clutch groove 35 Sliding plate 36 Clutch Pin 37 First compression coil spring 38 Bearing 39 Blocking plate 39a Projection 39b Cam slope 39c Blocking portion 40 Guide 40b Projection surface 41 Receiving member 42 Second compression coil spring 43 Connecting tool 44 First planetary gear 45 First internal gear 46 Sleeve 47 Second internal gear 48 Third internal gear 49 Second sun gear 50 Third sun gear 51 Second planetary gear 52 Third planetary gear 53 First pin 54 Second pin 55 Third Pin 56 56 First carrier 57 Second carrier 58 Third carrier 61 Motor Over scan 64 clutch housing 65 a shaft (sun gear)
66 planetary gear 67 fixed internal gear 68 movable internal gear 69 clutch plate 69a, 75c shaft hole 70 crank 70a, 70b crank pin 71 heart cam 72 cam groove 73, 78 compression spring 74 fulcrum shaft 75a concave groove 75b long hole

Claims (3)

Between the electric motor and the reduction gear, an electric motor of the clutch mechanism having a clutch mechanism driving of the motor is transmitted to the output shaft through the reduction gear,
A clutch groove is formed on the axial end surface of the speed reducer main body side, and a clutch pin or an engaging portion that can be fitted into the clutch groove is protruded from the housing portion that houses the electric motor, and is slidable in the axial direction . A sliding plate and a cam mechanism for holding the axial position of the sliding plate are provided. The cam mechanism is arranged on the outer periphery of the housing portion so that the sliding plate comes close to the speed reducer main body side and the clutch pin or the engagement mechanism. By holding the position where the joint part fits into the clutch groove , the speed reducer body is fixed to the housing part and the drive is transmitted from the motor to the output shaft through the speed reducer, and the sliding plate is separated from the speed reducer body side. off, and a state rotatable reducer comprises a planetary gear mechanism in the power transmission from the power transmission cut off the output side of the motor side by the clutch pin or the engagement portion to hold the position of Ru exit from the clutch groove that obtain conversion The clutch mechanism of the electric motor and butterfly. 2. The clutch mechanism for an electric motor according to claim 1 , wherein a wire is connected to the sliding plate from the shaft end side of the housing portion . In the speed reducer, an internal gear that meshes with a sun gear provided on a motor shaft via a planetary gear is formed in at least one stage in the speed reducer body, and an output shaft is rotationally driven via the planetary gear that meshes with each internal gear. The clutch mechanism for an electric motor according to claim 1.

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