JP2008208585A - Clutch mechanism of electric motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch mechanism of an electric motor capable of reducing the number of parts of the electric motor to achieve an excellent assembly property and reducing its size in the axial direction. <P>SOLUTION: In this clutch mechanism of the electric motor, a sensor substrate 51 having a rotation detection sensor for detecting a rotation signal of a sensor magnet 46 is assembled and sandwiched between the electric motor 8 and a reduction gear body 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

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.

  2. Description of the Related Art An electric winder that uses a motor to rotate a rotating drum around which a long object such as a shutter, a blind, or a curtain is wound is used. 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.

  On the side opposite to the motor output side, a sensor board on which a rotation plate and a sensor magnet are provided on the motor shaft and a rotation detection sensor for detecting a rotation signal of the motor such as a photo interrupter or a hall sensor is provided. In addition, a brake mechanism (for example, an electromagnetic brake) is provided on the side opposite to the output shaft of the motor unit so that the shutter or the like does not move in a stopped state.

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 link the electric motor and the output shaft are operated and applied as a load, so the drive transmission between the electric motor and the output shaft is released (patent) Reference 1).
JP 2002-194974 A

  In the electric motor described above, if the rotating plate and the sensor board are provided on the side opposite to the output shaft of the motor, it is necessary to separately provide a mechanism for fixing the sensor board, which increases the number of components and increases the size of the electric motor in the axial direction. . If an electromagnetic brake is provided on the side opposite to the output shaft of the motor, it is necessary to provide a space in consideration of the leakage flux of the sensor magnet, which increases the size of the electric motor in the axial direction.

  The present invention has been made to solve these problems, and an object of the present invention is to provide a clutch mechanism for an electric motor that is easy to assemble by reducing the number of parts of the electric motor and has a reduced axial size. There is to do.

In order to achieve the above object, the present invention comprises the following arrangement.
A clutch mechanism of an electric motor having a clutch mechanism between the electric motor and the speed reducer, in which the drive of the electric motor is transmitted to the output shaft through the speed reducer, and detects a rotation signal of the motor between the electric motor and the speed reducer body A sensor substrate having a rotation detection sensor is sandwiched and assembled.
In addition, the sensor board is sandwiched and assembled between the output shaft side surface of the motor and the speed reducer main body.
Further, the sensor board is provided with a detection switch for detecting a position of a slide member that is slid by manual operation and switches between connection and release of the clutch.

If the above-described clutch mechanism of the electric motor is used, a sensor board having a rotation detection sensor for detecting a rotation signal of the motor is sandwiched and assembled between the electric motor and the reduction gear body, so that the electric motor is enlarged in the axial direction. Therefore, the sensor substrate can be easily assembled.
In addition, if the sensor board is assembled by being sandwiched between the damper on the output side surface of the motor and the reducer body, the screws for fixing the board and the board for mounting are no longer necessary. Improves.
The sensor board is provided with a detection switch that detects the position of a slide member that is slid by manual operation and switches between connection and disconnection of the clutch. Since the connection / disconnection state can be detected and notified to the user, an operation error of the motor is less likely to occur, and the multi-function integration of the motor can be realized by the sensor board.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best embodiment of a clutch mechanism for an electric motor according to the present invention will be described with reference to the accompanying drawings. Below, the clutch mechanism of the electric motor provided in the electric winding device for shutters will be described as an example. As an example of the electric winding device, a tubular type device is used. That is, an electric motor with a brake provided in a housing portion provided coaxially with the rotating drum, and a clutch mechanism of the electric motor are integrally provided in the rotating drum. When the electric motor in the rotating drum is started, the rotating drum is driven to rotate by transmitting the drive to the output shaft through the clutch mechanism.

  First, with reference to FIG.6 and FIG.7, schematic structure of the electric winding apparatus for shutters is demonstrated. In FIG. 7, 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. 6, the drive unit 7 is provided in the rotary drum 1, and an electromagnetic brake, an electric motor (motor) 8, a clutch mechanism 9, and a speed reducer 10 (not shown) are arranged in this order in the axial direction from the right end in the axial direction. . The electromagnetic brake and the electric motor 8 are disposed in the rotary drum 1, and the rotary drum 1 is rotatably fixed to a mounting frame (not shown). In FIG. 7, commercial power is supplied from the shaft end side of the rotary drum 1 to the electromagnetic brake and the electric motor 8, and is connected to a switch 11 provided on a wall or the like. Further, in FIG. 6, a wire 13 for clutch operation is connected to a wire mounting plate (an example of a slide member) 12 provided in the speed reducer 10 and is pulled out through an outer tube 14 as shown in FIG. It is connected to the operation rod 15.

  Next, a more detailed configuration of the drive unit 7 will be described with reference to FIGS. 1 to 3. An electromagnetic brake (not shown) is released in conjunction with the activation of the electric motor 8. In FIG. 1B, the electric motor 8 is assembled integrally with a reduction gear main body (housing) 17 via a damper 16. A motor shaft 18 is inserted into the speed reducer main body 17, and the clutch mechanism 9 and the speed reducer 10 are accommodated in connection with the motor shaft 18.

  A plurality of clutch grooves 20 are formed at predetermined intervals in the circumferential direction on the end face of the internal gear 19 accommodated in the speed reducer main body 17. In the clutch mechanism 9, a clutch pin 21 is provided so as to face the clutch groove 20 and be connected to the sliding operation of the wire mounting plate 12 so as to be inserted and removed in the axial direction. In FIG. 1C, the speed reducer main body 17 is provided with a swing arm 23 that swings about the rotation fulcrum 22. One end 23 a of the swing arm 23 is connected to the clutch pin 21 and the other end 23 b is connected to the wire mounting plate 12. The clutch pin 21 is always urged toward the end face of the internal gear 19 by a second compression spring 35 provided between the clutch pin 21 and the damper 16.

  When the clutch is connected, the clutch pin 21 is pressed against the end face of the internal gear 19 and fits into the clutch groove 20 as it is, or the internal gear 19 is kept pressed against the end face of the internal gear 19. It rotates and fits into one of the clutch grooves 20. 2B and 3B, the clutch pin 21 is held out of the clutch groove 20 by manually operating the wire 13 connected to the wire mounting plate 12.

  Here, the configuration of the clutch mechanism 9 will be described. In FIG. 1B, the speed reducer main body 17 is provided with a clutch shaft 24 parallel to the motor shaft 18. A clutch gear 25 and a pushing member 32 are slidably supported on the clutch shaft 24. A base member 29 is integrally assembled on the outer peripheral side of the clutch shaft 24. The base member 29 guides the movement of the clutch gear 25 and the pushing member 32. The clutch gear 25 and the pushing member 32 slide in conjunction with the sliding movement of the wire mounting plate 12, and the first position where the clutch pin 21 is fitted in the clutch groove 20 and the second position where the clutch pin 21 is pulled out from the clutch groove 20. Held in.

The motor shaft 18 is provided with a release gear 26 that meshes with the clutch gear 25 at a second position where the clutch is released. The clutch gear 25 is slid and held along the clutch shaft 24 to the first position or the second position in conjunction with the sliding operation of the wire mounting plate 12. The release gear 26 is disengaged from the clutch gear 25 at the first position, and meshes with the clutch gear 25 while rotating slightly when moving to the second position.
3B, when the motor 8 is started with the clutch gear 25 in the second position, that is, with the manual operation of the wire mounting plate 12 and the clutch pin 21 coming out of the clutch groove 20, the clutch gear is released through the release gear 26. 25, the clutch gear 25 slides from the second position to the first position, and the wire mounting plate 12 slides to move the clutch pin 21 to the first position where the clutch pin 21 fits into the clutch groove 20. It has come to be. The release gear 26 is urged toward the electric motor 8 by a third compression spring 48 provided around the motor shaft 18.
That is, when the motor is started with the manual operation of the wire mounting plate 12 and the clutch pin 21 coming out of the clutch groove 20, the clutch gear 25 is rotated through the release gear 26 so that the clutch gear 25 is moved from the second position to the second position. The clutch pin 21 is slid to the first position and moved to the first position where the clutch pin 21 is fitted in the clutch groove 20 so as to be held.

Next, the configuration of the release gear 26 will be described more specifically with reference to FIG.
In FIG. 1B, a sleeve 47 is fitted on the motor shaft 18 in the vicinity of the sensor magnet 46, and is fixed by a parallel pin. The sensor magnet 46 is fitted and fixed to the motor shaft 18. The release gear 26 is fitted coaxially on the outer periphery of the sleeve 47. The release gear 26 is urged toward the sleeve 47 in the axial direction by a third compression spring 48 fixed to the motor shaft 18. The sleeve 47 rotates with the rotation of the motor shaft 18, and the release gear 26 rotates with the sleeve 47 and the inclined surface pressed against each other or the wall surfaces of the stepped portion abutted against each other. Further, when the rotation is performed in a direction in which the wall surfaces of the stepped portion do not come into contact with each other, the inclined gears slide, so that the release gear 26 rotates freely.

  In FIG. 1B, a sensor magnet 46 is provided near the end of the speed reducer main body 17 on the motor shaft 18 inserted into the speed reducer main body 17. A sensor substrate 51 having a rotation detection sensor that detects a rotation signal of the sensor magnet 46 is provided between the electric motor 8 and the speed reducer main body 17.

  Specifically, in FIGS. 5A and 5B, the sensor substrate 51 is sandwiched and assembled between the damper 16 and the speed reducer main body 17 provided on the output side surface of the electric motor 8. A screw (not shown) is inserted into a screw hole 16a formed on one diagonal line of the damper 16, and fixed to a screw hole 17a (see FIG. 4A) on the speed reducer main body 17 side by screw fitting. Further, screws on the motor 8 side are fitted into screw holes 16b formed on other diagonal lines of the damper 16.

  4A and 4B, a rib 53 is provided on the end surface portion of the speed reducer main body 17. A groove 54 is formed at a position facing a part of the rib 53. The sensor substrate 51 is inserted in the axial direction using the concave groove 54 as a guide and incorporated in the speed reducer main body 17. After the sensor substrate 51 is assembled in the speed reducer main body 17, the damper 16 shown in FIGS. 5A and 5B is fixed with screws.

  In FIG. 1C, the sensor board 51 is provided with a detection switch (a limit switch, a photo switch, etc.) 52 for detecting the position of the wire mounting plate 12. The wire mounting plate 12 is provided with a protrusion 12 a at a portion corresponding to the detection switch 52. In FIG. 1B, when the clutch pin 21 is fitted into the clutch groove 20 and the clutch is connected, that is, when the clutch gear 25 and the release gear 26 are in the first position, the protrusion 12a is detected by the detection switch 52. It is in a state (ON state). 2B and 3B, when the wire 13 is pulled manually, the wire mounting plate 12 slides as shown in FIG. 2C and is held at the position shown in FIG. 3C, so that the detection switch 52 cannot detect the protrusion 12a (OFF) Status).

  Therefore, it can be determined from the signal of the detection switch 52 whether the clutch mechanism 9 is connected or disconnected. For example, when the wire mounting plate 12 is manually operated, the user can be notified by sounding a buzzer or blinking a warning lamp. In addition, when the operation switch is pressed while the detection switch 52 is OFF, the motor 8 can be controlled to rotate in a predetermined direction to automatically connect the clutch mechanism 9. Thereby, it becomes difficult for a user's operation mistake to occur, and multi-function integration of the electric motor 8 can be realized by the sensor substrate 51.

  The operation of the clutch mechanism 9 will be described. In FIGS. 1A to 1C, when the clutch mechanism 9 is connected, the detection switch 52 is in an ON state. When the operator pulls the wire 13 with the operating rod 15, the wire mounting plate 12 resists the elastic force of the first compression spring 34, the second compression spring 35 and the third compression spring 48, and the speed reducer main body. Move in the axial direction to the 17th side. At this time, in FIG. 2A-C, since the swing arm 23 rotates clockwise around the rotation fulcrum 22, the clutch pin 21 comes out of the clutch groove 20 and the coupling of the clutch mechanism 9 is released (FIG. 2A). -C shows the state in which the clutch pin 21 is displaced maximum by wire operation). Further, when the pulling force of the wire 13 is reduced, the wire mounting plate 12, the clutch gear 25, and the release gear 26 are caused by the elastic force of the first compression spring 34, the second compression spring 35, and the third compression spring 48. Is slightly pushed back to the right in the axial direction and held. At this time, in FIGS. 3A to 3C, the clutch gear 25 is held on the end surface of the base member 29 to release the clutch, and the detection switch 52 is OFF.

  Next, a planetary gear mechanism that is an example of the configuration of the speed reducer 10 will be described. In FIG. 1B, a plurality of stages of internal gears (a first internal gear 19 and a second internal gear 40) are assembled and housed in the reduction gear main body 17 integrally in the axial direction. The first sun gear 36 provided at the tip of the motor shaft 18 is in mesh with the first planetary gear 37. The first planetary gear 37 meshes with the first internal gear 19. The second sun gear 38 meshes with the second planetary gear 39. The second planetary gear 39 meshes with the second internal gear 40.

  A first carrier 42 is provided on the shaft 41 provided with the second sun gear 38. The first carrier 42 is provided with a first planetary gear 37 around the first pin 43. A second planetary gear 39 is provided around the second pin 45 in the second carrier 44 provided with the output shaft 6.

  When the motor shaft 18 is rotationally driven with the clutch mechanism 9 connected, the shaft 41 (the second sun gear 38 is passed through the first stage first sun gear 36, the first planetary gear 37, and the first carrier 42. ) Rotates. When the second sun gear 38 further rotates, the output shaft 6 is rotationally driven through the second planetary gear 39 and the second carrier 44.

  In addition, although the said Example demonstrated the electric winding apparatus for shutters, you may apply to the winding apparatus of other elongate objects, such as a curtain, a blind, and an awning. In addition, the sensor substrate is illustrated as being sandwiched between the damper and the speed reducer main body. However, when the motor is directly attached to the speed reducer main body, the sensor board is sandwiched between the output shaft side surface of the motor and the speed reducer main body. You may do it.

  The electric winding device may have a device configuration other than the tubular type. That is, in FIG. 8, the electric motor with brake 8, the clutch mechanism 9, and the speed reducer 10 are accommodated in a drive unit 61 provided outside the rotating drum 1. A drive side sprocket 62 is fitted into the output shaft 6 of the drive unit 61. A drum-side sprocket 63 is fitted on the winding shaft 3 of the rotary drum 1. An endless chain 64 is installed between the drive side sprocket 62 and the drum side sprocket 63. A switch 11 for operating the electric motor 8 is connected to the drive unit 61, and a wire 13 and an operating rod 15 for operating the clutch mechanism 9 are connected. As described above, when the drive unit 61 is provided outside the rotary drum 1, maintenance is facilitated.

It is an axial front view which shows the connection state of a clutch mechanism, arrow EE direction sectional drawing, and arrow FF direction sectional drawing. FIG. 6 is an axial front view, a cross-sectional view in the direction of arrow EE, and a cross-sectional view in the direction of arrow FF, showing the clutch mechanism during the disconnecting operation. It is an axial front view which shows the connection cancellation | release state of a clutch mechanism, arrow EE direction sectional drawing, and arrow FF direction sectional drawing. It is the end view and sectional drawing in which the sensor board was built in the reduction gear body. It is the end view and sectional drawing in which the sensor board was built in the reducer main body and the damper was provided. It is sectional drawing of a clutch mechanism. It is explanatory drawing which shows schematic structure of an electric winding apparatus. It is explanatory drawing which shows the other structure of an electric winding apparatus.

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 8 Electric motor 9 Clutch mechanism 10 Reducer 11 Switch 12 Wire mounting plate 12a Protrusion 13 Wire 14 Outer tube 15 Operation rod 16 Damper 16a, 16b 17a Screw hole 17 Reducer body 18 Motor shaft 19 First internal gear 20 Clutch groove 21 Clutch pin 22 Rotating fulcrum 23 Swing arm 24 Clutch shaft 25 Clutch gear 26 Release gear 34 First compression spring 35 Second compression spring Compression spring 36 First sun gear 37 First planetary gear 38 Second sun gear 39 Second planetary gear 40 Second internal gear 41 Shaft 42 First carrier 43 First pin 44 Second carrier 45 Second pin
46 sensor magnet 47 sleeve 48 third compression spring 51 sensor board 52 detection switch 53 rib 54 concave groove 61 drive unit 62 drive side sprocket 63 drum side sprocket 64 chain

Claims (3)

A clutch mechanism of an electric motor including a clutch mechanism between the electric motor and the reduction gear, wherein the drive of the electric motor is transmitted to the output shaft through the reduction gear;
A clutch mechanism for an electric motor, wherein a sensor board having a rotation detection sensor for detecting a rotation signal of the motor is sandwiched and assembled between the electric motor and the speed reducer main body.   The motor clutch mechanism according to claim 1, wherein the sensor substrate is sandwiched and assembled between the output shaft side surface of the motor and the speed reducer main body.   The clutch mechanism for an electric motor according to claim 1, wherein the sensor board is provided with a detection switch that detects a position of a slide member that is slid by manual operation to switch connection / disconnection of the clutch.

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