JP2010078044A - Clutch and motor with speed-reduction mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve layout performance by reducing a thickness dimension, by simplifying assembling work by reducing the number of parts. <P>SOLUTION: A through-hole 53 having a plurality of projection parts 54 is arranged in a driving rotary body 50, and a pressing leg part 76 inserted into an insertion clearance 55 is arranged in a driven rotary body 60. A flexible leg part 94 inserted into the insertion clearance 55 is arranged in a body cylindrical part 91 of a lock member 90. The flexible leg part 94 is provided with a pressing object piece 95 pressed to an O ring 36 of a bottom part 31a by the pressing leg part 76 when transmitting driving force to the driving rotary body 50 from the driven rotary body 60. The driving rotary body 50 can be used as a worm wheel without conventionally requiring a plurality of rollers, and the assembling work can be simplified by reducing the number of part items. The lock member 90 can be arranged in a rotational center part of the driving rotary body 50, and the layout performance can be improved by restraining the thickness dimension. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clutch and a motor with a speed reduction mechanism that can prevent a drive rotator from reversing due to an external force.

  2. Description of the Related Art Conventionally, as a drive source in a power window device, a sunroof device, or the like mounted on a vehicle such as an automobile, a motor with a speed reduction mechanism that can obtain a large output while being small is used. This motor with a speed reduction mechanism is rotationally driven by an operation switch provided in the vehicle interior or the like, and thereby opens and closes an opening / closing body (wind glass, sunroof, etc.).

  By the way, in a power window device, a sunroof device, etc., in order to prevent the opening / closing body from being opened by an external force applied to the opening / closing body, a reverse rotation preventing function is provided. By providing such a reverse rotation prevention function, it is possible to prevent the opening / closing body from being opened and prevent theft of the vehicle from occurring.

  As a motor with a speed reduction mechanism having such a reverse rotation prevention function, for example, a technique described in Patent Document 1 is known.

The drive device (motor with a speed reduction mechanism) described in Patent Document 1 includes a clutch having a drive rotating body and a driven rotating body that are rotated by a driving source, a plurality of rollers, and a housing that is housed so as to surround these. ing. The clutch is disposed so as to be coaxially overlapped with the worm wheel, the worm wheel is connected to the drive rotator so as to be integrally rotatable, and the output shaft is connected to the driven rotator so as to be integrally rotatable. The rotation of the driven rotator relative to the housing is allowed by the driving force (motor driving force) from the drive rotator, and the rotation of the driven rotator relative to the housing is restricted by the drive force (external force) from the driven rotator. It is like that.
International Publication No. 00/08349 pamphlet (Figs. 1 and 5)

  However, according to the motor with a speed reduction mechanism described in the above-mentioned Patent Document 1, in addition to having a plurality of rollers, the drive rotating body is provided separately from the worm wheel, so the number of parts is large. There may be a problem that the assembling work of the motor with the speed reduction mechanism becomes complicated. In addition, since the clutch is arranged so as to be coaxially overlapped with the worm wheel, the thickness dimension of the motor with a speed reduction mechanism is increased, and as a result, there is a problem that the layout of the motor with the speed reduction mechanism on the vehicle is deteriorated.

  An object of the present invention is to provide a clutch and a motor with a speed reduction mechanism that can reduce the number of parts, simplify assembly work, reduce the thickness dimension, and improve layout.

  The clutch of the present invention has a driving rotator and a driven rotator that are rotated by a driving source, and supports the drive rotator and the driven rotator coaxially so as to face one side surface in the axial direction of the drive rotator. A member, and is provided between the drive rotator and the driven rotator, allows transmission of driving force from the drive rotator to the driven rotator, and drives from the driven rotator to the drive rotator. A clutch having a lock member for restricting transmission of force, the clutch being provided at a rotation center of the drive rotator, penetrating in the axial direction of the drive rotator, and provided in the through hole. A plurality of convex portions projecting radially inward of the hole, a pressing leg portion provided on the driven rotary body, extending toward the support member and inserted between the convex portions of the drive rotary body; , Provided on the lock member, and A main body cylinder portion inserted inward in the direction, and provided in the main body cylinder portion, extending toward the support member and inserted in pairs with the pressing leg portions between the convex portions of the drive rotating body. Between the flexible leg, the pressing leg and the support member so as to protrude radially outward from the flexible leg, and driving from the driven rotary body to the drive rotary body And a pressed piece that is pressed against the support member by the pressing leg when transmitting force.

  In the clutch of the present invention, a concave or convex first opposing surface portion is formed at a portion of the pressing leg portion facing the pressed piece, and the first portion is formed at a portion of the pressing piece facing the pressing leg portion. A convex or concave second opposing surface portion that opposes the opposing surface portion is formed, and the first opposing surface portion presses the second opposing surface portion by relative rotation of the driven rotating body and the lock member. The leg is elastically deformed, and the pressed piece is pressed against the support member.

  In the clutch of the present invention, an elastic member is provided between the support member and the pressed piece, and when the driving force is transmitted from the driving rotating body to the driven rotating body, the elastic member and the pressed piece are disposed between the elastic member and the pressed piece. A gap is formed in the substrate.

  The clutch of the present invention is characterized in that the elastic member is made of an annular rubber having a substantially circular cross section.

  In the clutch of the present invention, an axial hole penetrating in the axial direction is provided at the rotational center of the main body cylinder portion, a central axis extending in the axial direction is provided at the rotational center of the driven rotor, and the central axis is rotated in the axial hole. It can be inserted freely.

  A motor with a speed reduction mechanism according to the present invention includes a yoke having a bottomed cylindrical shape, an armature that is rotatably provided in the yoke, an armature shaft that is provided at the center of rotation of the armature, and the armature shaft. A worm provided on the yoke, a bottomed cylindrical gear case connected to the opening of the yoke, and a reduction gear mechanism that is rotatably accommodated in the gear case and meshes with the worm to reduce the rotation of the armature. A motor with a speed reduction mechanism, the speed reduction gear mechanism having a gear tooth meshing with the worm on an outer peripheral surface, a driving rotator whose one side surface in the axial direction faces the bottom of the gear case, and coaxial with the driving rotator A driven rotator provided with an output shaft for outputting rotation of the armature, and provided between the drive rotator and the driven rotator. A locking member that allows transmission of the driving force from the driving rotator to the driven rotator and restricts transmission of the driving force from the driven rotator to the driving rotator, A through-hole provided in the rotation center and penetrating in the axial direction of the drive rotator, a plurality of convex portions provided in the through-hole and projecting radially inward of the through-hole, and provided in the driven rotator A pressing leg that extends toward the bottom of the gear case and is inserted between the protrusions of the drive rotor, and is provided on the lock member, and is inserted radially inward of the plurality of protrusions. A main body cylinder portion, and a flexible body provided in the main body cylinder portion, extending toward the bottom portion of the gear case, and being inserted between the convex portions of the drive rotating body as a pair with the pressing leg portion. From the flexible leg between the leg, the pressing leg and the support member Provided so as to protrude outward, from said driven rotor when the driving force transmission to the drive rotor, characterized in that it comprises a pressed piece which is pressed by the pressing legs on the bottom of the gear case.

  In the motor with a speed reduction mechanism of the present invention, a concave or convex first opposing surface portion is formed in a portion of the pressing leg portion facing the pressed piece, and the pressing piece of the pressing piece is opposed to the pressing leg portion. A convex or concave second opposing surface portion facing the first opposing surface portion is formed, and the first opposing surface portion presses the second opposing surface portion by relative rotation of the driven rotating body and the lock member. The flexible leg is elastically deformed, and the pressed piece is pressed against the bottom of the gear case.

  In the motor with a speed reduction mechanism of the present invention, an elastic member is provided between the bottom of the gear case and the pressed piece, and when the driving force is transmitted from the drive rotating body to the driven rotating body, the elastic member and the pressed member are provided. A gap is formed between the pieces.

  In the motor with a speed reduction mechanism according to the present invention, the elastic member is made of an annular rubber having a substantially circular cross section.

  In the motor with a speed reduction mechanism of the present invention, a shaft hole penetrating in the axial direction is provided at the rotation center of the main body cylinder portion, a central axis extending in the axial direction is provided at the rotation center of the driven rotor, and the center is formed in the shaft hole. The shaft is rotatably inserted.

  According to the present invention, a through hole having a plurality of convex portions projecting radially inward is provided at the rotation center of the drive rotator, and each convex portion of the drive rotator is extended toward the support member in the driven rotator. A press leg portion inserted between the plurality of convex portions is provided on the lock member, and a main body cylinder portion is provided on a radially inner side of the plurality of convex portions. A flexible leg that is inserted in pairs with the pressing leg is provided between the convex parts, and is driven from the driven rotating body so as to protrude radially outward from the flexible leg between the pressing leg and the support member. A pressed piece that is pressed against the support member by the pressing leg when the driving force is transmitted to the rotating body is provided. Accordingly, a plurality of rollers are not required as before, and the drive rotating body can be used as a worm wheel, so that the number of parts can be reduced and the assembling work can be simplified. Furthermore, since the lock member can be disposed at the center of rotation of the drive rotator, an increase in thickness can be suppressed, and the layout of the motor with a speed reduction mechanism can be improved.

  According to the present invention, a concave or convex first opposing surface portion is formed at a portion of the pressing leg portion that opposes the pressed piece, and a portion of the pressing piece that opposes the pressing leg portion opposes the first opposing surface portion. A convex or concave second opposing surface part is formed, and the flexible leg part is elastically deformed by the first opposing surface part pressing the second opposing surface part due to the relative rotation of the driven rotating body and the lock member, so that the pressed leg is pressed. Since the piece is pressed against the support member, a braking force can be generated on the driven rotating body by the frictional force of the contact portion between the pressed piece and the support member.

  According to the present invention, the elastic member is provided between the support member and the pressed piece, and a gap is formed between the elastic member and the pressed piece when the driving force is transmitted from the driving rotating body to the driven rotating body. Therefore, the driven rotator can be smoothly rotated by the driving force from the driving rotator, and the driven rotator can be firmly locked by the driving force from the driven rotator.

  According to the present invention, since the elastic member is made of an annular rubber having a substantially circular cross section, when a rotational force is applied from the driven rotating body to the driving rotating body, the deformation of the elastic member is uniform at each pressed piece portion. As a result, a uniform braking force can be generated at each pressed piece, and the driven rotor can be firmly locked.

  According to the present invention, the axial hole penetrating in the axial direction is provided at the rotation center of the main body cylinder portion, the central axis extending in the axial direction is provided at the rotation center of the driven rotating body, and the central axis is rotatably inserted into the shaft hole. Therefore, the axial displacement of the lock member relative to the driven rotating body can be prevented, and the driven rotating body can be stably locked.

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

  1 is a plan view of a motor with a speed reduction mechanism provided with a clutch according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a perspective view partially showing a bottom portion of a gear case. 4 is a perspective view showing the driving rotary body, FIG. 5 is a perspective view showing the driven rotary body, and FIG. 6 is a perspective view showing the lock member.

  As shown in FIG. 1, a motor 10 with a speed reduction mechanism as an electric motor is used as a drive source of a power window device (not shown) mounted on a vehicle such as an automobile, and is a wind regulator (see FIG. 1). (Not shown). Since the motor 10 with a speed reduction mechanism is installed in a narrow space formed inside a vehicle door (not shown), as shown in FIG. It has become. The motor 10 with a speed reduction mechanism includes a motor unit 20 and a gear unit 30, and the motor unit 20 and the gear unit 30 are integrated (unitized) by a plurality of fastening screws 11.

  The motor unit 20 constitutes a drive source in the present invention, and includes a yoke 21 formed into a bottomed cylindrical shape by pressing (deep drawing) a steel plate made of a magnetic material. A pair of magnets 22 is disposed inside the yoke 21 so as to face each other, and an armature 23 around which a coil (not shown) is wound is rotatably provided inside each magnet 22.

  An armature shaft 24 penetrates and is fixed to the rotation center of the armature 23, and a commutator 25 is fixed to a portion of the armature shaft 24 close to the armature 23. An end of a coil wound around the armature 23 is electrically connected to the commutator 25, and a pair of brushes 26 are in sliding contact with the outer periphery of the commutator 25. Each brush 26 is pressed against the commutator 25 by a spring member 27 at a predetermined pressure. Accordingly, a driving current is supplied to each brush 26 from a controller (not shown), whereby a rotational force (electromagnetic force) is applied to the armature 23. The armature shaft 24 rotates at a predetermined rotational speed and rotational torque.

  The gear portion 30 includes a gear case 31 formed into a bottomed cylindrical shape by injection molding a resin material such as plastic. The gear case 31 is connected to an opening (right side in the drawing) of the yoke 21, and inside the gear case 31, a worm shaft 32 integrally formed with a worm 32 a on the outer peripheral portion, and a reduction gear mechanism 33 meshing with the worm 32 a. Is rotatably accommodated. The worm shaft 32 is provided coaxially with the armature shaft 24 and is provided integrally with the armature shaft 24. The reduction gear mechanism 33 functions as a worm wheel, and decelerates the rotation of the armature shaft 24 to output a rotation with a high torque.

  As shown in FIGS. 2 and 3, one end side (the lower side in the figure) of the support pin 34 is fixed to the substantially central portion of the bottom portion (support member) 31 a of the gear case 31, and the other end of the support pin 34. The side (the upper side in the figure) extends to the outside of the gear case 31. An annular recess 35 is formed on the outer peripheral side of the support pin 34 of the bottom 31a, and an annular rubber (O-ring) 36 having a substantially circular cross section as an elastic member is attached to the annular recess 35. An annular convex portion 37 is formed on the outer peripheral side of the annular concave portion 35 of the bottom portion 31a, and the annular convex portion 37 is in sliding contact with one side surface 52 in the axial direction of the drive rotating body 50. The annular protrusion 37 suppresses an increase in rotational resistance of the drive rotator 50 with respect to the gear case 31 by supporting the drive rotator 50 so as to be partially rotatable.

  On the other end side of the support pin 34, an annular groove 34a is integrally provided. A retaining ring 38 for preventing the reduction gear mechanism 33 from coming off from the support pin 34 is attached to the annular groove 34a. A washer 39 is mounted between the retaining ring 38 and the reduction gear mechanism 33 as shown in FIG. 2. By providing the washer 39, the reduction gear mechanism 33, the support pin 34, and the retaining ring 38 I try to suppress rattling.

  The reduction gear mechanism 33 includes a drive rotator 50 provided on the bottom 31 a side of the gear case 31, and a driven rotator 60 that is partially exposed outside the gear case 31. Each of the rotating bodies 50 and 60 is arranged coaxially with the support pin 34 as the center, and is rotatable about the support pin 34.

  As shown in FIGS. 2 and 4, the drive rotator 50 is formed in a substantially disk shape, and gear teeth 51 that mesh with the worm 32 a are integrally provided on the outer peripheral surface of the drive rotator 50. Further, the bottom surface 31a of the gear case 31 faces the one side surface 52 in the axial direction of the drive rotator 50 so that the annular convex portion 37 is in sliding contact.

  A through hole 53 penetrating in the axial direction of the drive rotator 50 is integrally provided at the rotation center of the drive rotator 50. The through-hole 53 is integrally provided with a plurality of convex portions 54 (four in the drawing) protruding inward in the radial direction of the drive rotator 50, and each convex portion 54 is provided in the circumferential direction of the drive rotator 50. It is arranged at equal intervals (90 ° intervals). A plurality of insertion gaps 55 are formed between the convex portions 54 along the circumferential direction of the drive rotating body 50.

  As shown in FIGS. 2 and 5, the driven rotor 60 is formed in a substantially disk shape, and has a large diameter portion 70 disposed inside the gear case 31 and a small diameter portion 80 disposed outside the gear case 31. And. The small diameter portion 80 constitutes an output shaft in the present invention, and a pinion 81 is integrally formed on the outer peripheral portion thereof. The rotation of the armature 23 is output from the pinion 81 via the armature shaft 24, the worm shaft 32, the driving rotating body 50, and the driven rotating body 60, thereby forming a window regulator meshed with the pinion 81. (Not shown) is driven.

  An annular recess 72 is integrally provided on an upper surface 71 on the upper side of the large-diameter portion 70 in the drawing, and a rubber O-ring 73 is attached to the annular recess 72. The O-ring 73 is in sliding contact with the cover member 40 that closes the opening of the gear case 31. A lip seal 41 is integrally provided inside the cover member 40 in the radial direction, and the lip seal 41 comes into sliding contact with a portion where the pinion 81 on the proximal end side of the small diameter portion 80 is not formed. Yes. This prevents rainwater, dust, and the like from entering the gear case 31.

  An annular convex portion 75 is integrally provided on a lower surface 74 of the large-diameter portion 70 on the lower side in the figure, and the annular convex portion 75 comes into sliding contact with the other axial side surface 56 of the drive rotating body 50. ing. The annular protrusion 75 makes the relative rotation of the driven rotator 60 with respect to the drive rotator 50 easier by partially contacting the other axial side surface 56 of the drive rotator 50.

  A plurality of pressing legs 76 (four in the figure) are integrally provided on the radially inner side of the annular convex portion 75. The respective pressing legs 76 are arranged at equal intervals (90 ° intervals) along the circumferential direction of the large-diameter portion 70, and as shown in FIG. It extends toward the bottom 31 a of the gear case 31.

  Each pressing leg portion 76 is inserted through each insertion gap 55 provided in the drive rotator 50, and a central portion along the circumferential direction is provided at the distal end side in the axial direction of each pressing leg portion 76. The first opposing surface portions 76a having a concave shape are integrally provided. In addition, a hollow center shaft 77 is integrally provided at the rotation center of the driven rotor 60 on the radially inner side of each pressing leg 76 so as to extend in the axial direction, and the center shaft 77 rotates around the support pin 34. It is supported freely.

  As shown in FIGS. 2 and 6, a lock member 90 is provided between the drive rotator 50 and the driven rotator 60. The lock member 90 has a main body cylinder portion 91 that forms the main body, and the main body cylinder portion 91 is rotatably inserted radially inward of each convex portion 54 of the drive rotating body 50. Yes. A shaft hole 92 penetrating in the axial direction is formed inside the main body cylindrical portion 91, and the central shaft 77 of the driven rotor 60 is inserted into the shaft hole 92. As a result, the lock member 90 is rotatably supported by the driven rotor 60 without rattling.

  A plurality of projecting pieces 93 (four in the drawing) projecting radially outward are integrally provided on the upper end side (upper side in the drawing) of the main body cylinder portion 91, and each projecting piece 93 is formed on the drive rotating body 50. Are arranged in the respective insertion gaps 55 provided in the. The base end side of the flexible leg 94 extending in the axial direction of the main body cylinder portion 91 is connected to the radially outer side of each protruding piece 93, and the distal end side of each flexible leg 94 is the bottom of the gear case 31. It is extended toward 31a. A predetermined gap is formed between each flexible leg portion 94 and the main body cylinder portion 91, and each flexible leg portion 94 is inserted into each insertion gap 55 as a pair with each pressing leg portion 76. Thus, the main body cylinder portion 91 is elastically deformed in the radial direction.

  Between each pressing leg 76 and the bottom 31a, a pressed piece 95 protruding radially outward from the tip side of each flexible leg 94 is integrally provided, and each pressed piece 95 is Each pressing leg 76 is extended to a position facing the first facing surface portion 76a provided on the front end side in the axial direction. A second opposing surface portion 95a having a convex central portion along the circumferential direction is integrally provided at a portion (upper side in the drawing) of each pressed piece 95 facing each first opposing surface portion 76a. .

  An O-ring 36 is provided between each pressed piece 95 and the bottom 31a of the gear case 31, and each pressed piece 95 and the O-ring are in a state where each flexible leg 94 is not elastically deformed. A predetermined gap is formed between each of the pressed pieces 95 and the O-ring 36 in a state where each flexible leg 94 is elastically deformed radially inward. Since the O-ring 36 is made of an annular rubber having a substantially circular cross section, when a rotational force is applied from the driven rotating body 60 to the driving rotating body 50, the deformation of the O-ring 36 is changed at each pressed piece 95. By being performed uniformly, a uniform braking force can be generated at the portion of each pressed piece 95.

  Here, the reduction gear mechanism 33 is constituted by the drive rotator 50, the driven rotator 60 and the lock member 90. Further, the bottom 31 a of the gear case 31, the drive rotator 50, the driven rotator 60, and the lock member 90 constitute a clutch in the present invention.

  Next, the assembly procedure of the reduction gear mechanism 33 will be described in detail with reference to the drawings. FIG. 7 is an exploded perspective view for explaining the assembly procedure of the reduction gear mechanism.

  First, a gear case 31 having a support pin 34 fixed to the bottom 31a is prepared, and an O-ring 36 is attached to the annular recess 35 (gear case assembling step).

  Next, the O-ring 73 is attached to the annular recess 72, and the shaft hole 92 of the lock member 90 is attached to the central shaft 77 of the driven rotating body 60. At this time, the pressing leg portion 76 of the driven rotor 60 and the flexible leg portion 94 of the lock member 90 are made to coincide with each other in the circumferential direction, and the first facing surface portion 76a of the pressing leg portion 76 and the pressed piece 95 are secondly opposed. The surface portion 95a is opposed to the surface portion 95a. Thereafter, the drive rotator 50 is mounted on the lock member 90 so that the radially inner side of each convex portion 54 of the drive rotator 50 is in sliding contact with the main body cylinder portion 91 of the lock member 90. At this time, the pressing leg portion 76 and the flexible leg portion 94 are inserted into the insertion gaps 55 of the drive rotating body 50. As a result, the lock member 90 and the drive rotator 50 are assembled to the central shaft 77 of the driven rotator 60 to complete the reduction gear mechanism 33 (reduction gear mechanism assembling step).

  Next, by inserting the support pin 34 through the center shaft 77 of the driven rotor 60, the reduction gear mechanism 33 is supported by the gear case 31, and the washer 39 is attached to the support pin 34 under the state. A retaining ring 38 is attached to the annular groove 34a of the support pin 34 (reduction gear mechanism assembling step).

  Next, the operation of the motor 10 with the speed reduction mechanism configured as described above will be described in detail with reference to the drawings. 8A and 8B are explanatory views for explaining the neutral state of the reduction gear mechanism, FIGS. 9A and 9B are explanatory views for explaining the normal operation state of the reduction gear mechanism, and FIG. (a), (b) represents the explanatory view explaining the external force load state of a reduction gear mechanism, respectively.

[Neutral state]
For example, when the window glass is closed and the motor 10 with the speed reduction mechanism is stopped, the drive rotator 50, the lock member 90, and the driven rotator 60 are all stopped. In this state, as shown in the abutting portion CP1 in FIG. 8A, one circumferential direction side of each convex portion 54 of the drive rotating body 50 contacts the other circumferential side side of each protruding piece 93 of the lock member 90. It touches. Further, as shown in FIG. 8B, the axial centers C of the respective pressing leg portions 76 of the driven rotating body 60 and the respective flexible leg portions 94 of the lock member 90 are in a state of being aligned in the circumferential direction. At this time, the deepest portion of the first opposing surface portion 76a of each pressing leg 76 and the top portion of the second opposing surface portion 95a of each pressed piece 95 face each other, and each first opposing surface portion 76a and each second opposing surface portion. The contact portion with 95a is CPa, and they are in the closest state.

[Normal operation state]
For example, when the motor 10 with a speed reduction mechanism is operated to close the window glass, the drive rotating body 50 rotates in the forward direction as the armature 23 rotates as shown by the arrow (1) in FIG. . Then, the drive rotator 50 rotates relative to the driven rotator 60 by the angle α under the state in which the protrusions 54 and the protrusions 93 are in contact with each other at the contact portion CP1. The other side in the circumferential direction of the leg portion 76 is in contact with one side in the circumferential direction of each convex portion 54 like a contact portion CP2. At this time, the lock member 90 rotates relative to the driven rotor 60, and as shown in FIG. 9B, the axis C1 of each flexible leg 94 and the axis C2 of each pressing leg 76 are connected. In the circumferential direction, each first facing surface portion 76a presses each second facing surface portion 95a, and the contact portion between each first facing surface portion 76a and each second facing surface portion 95a becomes CPb.

  Thereby, each flexible leg 94 is elastically deformed radially inward, and each second facing surface portion 95a is separated from each first facing surface portion 76a as indicated by an arrow in the figure. At this time, since a predetermined gap is formed between each pressed piece 95 and the O-ring 36, the lock member 90 and the driven rotor 60 are driven and rotated as indicated by an arrow (2) in the figure. The body 50 can rotate as the body 50 rotates. Thus, the lock member 90 allows transmission of driving force (motor drive) from the drive rotating body 50 to the driven rotating body 60, and as a result, the window glass can be closed.

[External force load state]
For example, when an external force is applied in a direction to open the closed window glass, the external force is transmitted to the driven rotating body 60. Then, as shown by the arrow (3) in FIG. 10A, the driven rotator 60 is rotated in the reverse direction. Accordingly, the drive rotating body 50 is also slightly rotated in the reverse direction under the state where the respective pressing leg portions 76 and the respective convex portions 54 are in contact with each other at the contact portion CP2. At this time, the driven rotor 60 rotates relative to the lock member 90 by an angle β (β> α), and as shown in FIG. 10B, the axis C1 of each flexible leg 94 and each The axial center C2 of the pressing leg 76 is greatly displaced in the circumferential direction, and each first facing surface portion 76a further presses each second facing surface portion 95a, and each first facing surface portion 76a and each second facing surface portion 95a The contact portion is CPc.

  Thereby, each flexible leg 94 is greatly elastically deformed radially inward, and each second facing surface portion 95a is greatly separated from each first facing surface portion 76a as indicated by an arrow in the figure, and each pressed piece 95 is pressed. However, each of the pressing legs 76 is pressed against the O-ring 36 of the bottom 31 a to compress and deform the O-ring 36.

  A large braking force (frictional force) is generated between each pressed piece 95 and the O-ring 36, and the relative rotation of the lock member 90 with respect to the bottom 31a is restricted. Thereafter, as shown in FIG. 10A, one circumferential side of each protruding piece 93 abuts on the other circumferential side of each convex portion 54 in the abutting portion CP3. Is stopped in the state shown in the figure. As described above, the lock member 90 regulates the transmission of the driving force (external force) from the driven rotator 60 to the drive rotator 50. As a result, the window glass can be prevented from being opened. it can.

  As described above in detail, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the drive rotator 50 is provided with the through-hole 53 having the plurality of convex portions 54, and the driven rotator 60 is directed toward the bottom 31 a. A pressing leg portion 76 that is extended and inserted into the insertion gap 55 of the drive rotator 50 is provided, and a main body cylinder portion 91 that is inserted inward in the radial direction of the plurality of convex portions 54 is provided on the lock member 90. A flexible leg 94 that is inserted in a pair with the pressing leg 76 in the insertion gap 55 is provided in the main body cylindrical portion 91, and the radial direction from the flexible leg 94 is between the pressing leg 76 and the bottom 31 a. A pressing piece 95 that is pressed against the O-ring 36 of the bottom 31 a by the pressing leg 76 when the driving force is transmitted from the driven rotating body 60 to the driving rotating body 50 so as to protrude outward is provided.

  Accordingly, a plurality of rollers are not required as before, and the drive rotating body 50 can be used as a worm wheel, so that the number of parts can be reduced and the assembling work can be simplified. Furthermore, since the lock member 90 can be disposed at the center of rotation of the drive rotor 50, an increase in thickness can be suppressed, and the layout of the motor 10 with the speed reduction mechanism can be improved.

  Further, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the O-ring 36 is provided between the bottom portion 31a and the pressed piece 95, and when driving force is transmitted from the drive rotating body 50 to the driven rotating body 60, Since a gap is formed between the O-ring 36 and the pressed piece 95, the driven rotating body 60 can be smoothly rotated depending on the driving force from the driving rotating body 50. Depending on the driving force, a large braking force can be generated by the friction force on the driven rotator 60, and the driven rotator 60 can be firmly locked.

  Furthermore, according to the motor 10 with the speed reduction mechanism according to the present embodiment, the shaft hole 92 penetrating in the axial direction is provided at the rotation center of the main body cylindrical portion 91, and the central axis extending in the axial direction at the rotation center of the driven rotating body 60. 77, and the center shaft 77 is rotatably inserted into the shaft hole 92. Therefore, the shaft member can be prevented from being displaced with respect to the driven rotor 60, and the driven rotor 60 can be stably locked. Can do.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, four protrusions 54 (insertion gaps 55), four pressing legs 76, and four flexible legs 94 are provided, but the present invention is not limited thereto, Any number can be provided. In this case, since a relatively large force is applied to the flexible leg portion that generates the braking force in the circumferential direction, the rigidity of the flexible leg portion in the circumferential direction is taken into consideration.

  Moreover, in the said embodiment, although the 1st opposing surface part 76a of the press leg part 76 was made into concave shape, and the 2nd opposing surface part 95a of the flexible leg part 94 was shown as convex shape, this invention is shown to this. Not limited to this, the first opposing surface provided on the pressing leg 76 may be convex, and the second opposing surface provided on the flexible leg 94 may be concave.

  Further, in the above embodiment, the first opposing surface portion 76a and the second opposing surface portion 95a are each formed in a substantially arc shape as shown in FIGS. 8 to 10, but the present invention is not limited to this. For example, it may be formed in a triangular shape or a trapezoidal shape. In short, the first facing surface portion 76a can press the second facing surface portion 95a in accordance with the relative rotation between the driven rotating body 60 and the lock member 90, and the first facing surface portion 76a and the second facing surface portion 95a can be separated from each other. Any shape can be used.

  Moreover, in the said embodiment, although what provided the O ring 36 as an elastic member in the bottom part 31a of the gear case 31 was shown, this invention is not restricted to this, Between the to-be-pressed piece 95 and the bottom part 31a. If the frictional force required for braking the driven rotor 60 can be obtained, the O-ring 36 can be omitted. Further, instead of the rubber O-ring 36, a ring-shaped member made of another material can be used.

  Further, in the above-described embodiment, the driven rotating body 60 is rotatably mounted on the support pin 34 without any interposition. However, the present invention is not limited to this, and the inner peripheral side of the driven rotating body 60 is shown. A radial bearing may be provided between the support pin 34 and the outer peripheral side of the support pin 34.

  In the above embodiment, when assembling the reduction gear mechanism 33, the lock member 90 is assembled to the central shaft 77 of the driven rotary body 60, and the drive rotary body 50 is assembled to the lock member 90, and then completed. Although the reduction gear mechanism 33 is mounted on the support pin 34, the present invention is not limited to this. For example, the center shaft 77 of the driven rotator 60 may be omitted, and the drive rotator 50 may be assembled to the lock member 90, and the lock member 90 and the driven rotator 60 may be assembled to the support pin 34, respectively. In this case, the reduction gear mechanism 33 is completed within the gear case 31. In addition, since the lock member can be made larger by omitting the central shaft 77, the lock member can be formed so as to obtain a larger braking force.

  Further, in the above-described embodiment, the motor 10 with the speed reduction mechanism as the electric motor is used as the drive source of the power window device mounted on the vehicle. However, the present invention is not limited to this, and the sunroof device is used. It can also be used as a drive source for power seat devices and the like. In short, it can be used as a drive source of a device that needs to fix a driving object such as an opening / closing body or a sheet at a predetermined reference position, that is, a drive source of a device that requires a reverse rotation prevention function.

  Moreover, in the said embodiment, although what used the electric motor with a brush as the motor part (drive source) 20 was shown, this invention is not restricted to this, For example, a brushless electric motor etc. are employ | adopted. You can also.

It is a top view of the motor with a reduction mechanism provided with the clutch which concerns on this invention. It is sectional drawing which follows the AA line of FIG. It is a perspective view which shows the bottom part of a gear case partially. It is a perspective view which shows a drive rotary body. It is a perspective view which shows a driven rotary body. It is a perspective view which shows a locking member. It is a disassembled perspective view explaining the assembly procedure of a reduction gear mechanism. (A), (b) is explanatory drawing explaining the neutral state of a reduction gear mechanism. (A), (b) is explanatory drawing explaining the normal operation state of a reduction gear mechanism. (A), (b) is explanatory drawing explaining the external force load state of a reduction gear mechanism.

Explanation of symbols

10 Motor with reduction mechanism (electric motor)
11 Fastening screw 20 Motor part (drive source)
21 yoke 22 magnet 23 armature 24 armature shaft 25 commutator 26 brush 27 spring member 30 gear portion 31 gear case 31a bottom (support member, clutch)
32 Worm shaft 32a Worm 33 Reduction gear mechanism 34 Support pin 34a Annular groove 35 Annular recess 36 O-ring (elastic member)
37 annular projection 38 retaining ring 39 washer 40 cover member 41 lip seal 50 driving rotary body (clutch, reduction gear mechanism)
51 Gear teeth 52 One side surface in the axial direction 53 Through hole 54 Protruding portion 55 Insertion gap 56 Other side surface in the axial direction 60 Driven rotating body (clutch, reduction gear mechanism)
70 Large-diameter portion 71 Upper surface 72 Annular recess 73 O-ring 74 Lower surface 75 Annular convex portion 76 Pressing leg portion 76a First opposing surface portion 77 Central axis 80 Small-diameter portion (output shaft)
81 Pinion 90 Lock member (clutch, reduction gear mechanism)
91 Body cylinder part 92 Shaft hole 93 Projection piece 94 Flexible leg part 95 Pressed piece 95a 2nd opposing surface part

Claims (10)

A drive rotator and a driven rotator that are rotated by a drive source; a support member that opposes one axial side surface of the drive rotator and supports the drive rotator and the driven rotator coaxially; and the drive rotation Is provided between the driven rotating body and the driven rotating body, allows transmission of driving force from the driving rotating body to the driven rotating body, and restricts transmission of driving force from the driven rotating body to the driving rotating body. A clutch having a locking member,
A through hole provided at the rotation center of the drive rotator and penetrating in the axial direction of the drive rotator;
A plurality of convex portions provided in the through hole and projecting radially inward of the through hole;
A pressing leg provided on the driven rotating body, extending toward the support member and inserted between the convex portions of the driving rotating body;
A main body cylinder portion provided on the lock member and inserted radially inside of the plurality of convex portions;
A flexible leg portion provided in the main body cylinder portion, extending toward the support member and inserted in a pair with the pressing leg portion between the convex portions of the drive rotating body;
The pressing leg portion is provided between the pressing leg portion and the support member so as to protrude radially outward from the flexible leg portion, and when the driving force is transmitted from the driven rotating body to the driving rotating body. And a pressed piece pressed against the support member.   2. The clutch according to claim 1, wherein a concave or convex first opposing surface portion is formed on a portion of the pressing leg portion facing the pressed piece, and the pressing portion of the pressed piece is opposed to the pressing leg portion. A convex or concave second opposing surface portion that opposes the first opposing surface portion is formed, and the first opposing surface portion presses the second opposing surface portion by relative rotation of the driven rotating body and the lock member. A clutch in which a flexible leg is elastically deformed and the pressed piece is pressed against the support member.   3. The clutch according to claim 1, wherein an elastic member is provided between the support member and the pressed piece, and the elastic member and the pressed pressure are transmitted when driving force is transmitted from the drive rotating body to the driven rotating body. A clutch characterized in that a gap is formed between the pieces.   4. The clutch according to claim 3, wherein the elastic member is made of an annular rubber having a substantially circular cross section.   5. The clutch according to claim 1, wherein an axial hole penetrating in the axial direction is provided at the rotation center of the main body cylinder portion, and a central axis extending in the axial direction is provided at the rotation center of the driven rotating body. The clutch is characterized in that the central shaft is rotatably inserted into the shaft hole. A yoke formed in a bottomed cylindrical shape, an armature provided rotatably in the yoke, an armature shaft provided at the center of rotation of the armature, a worm provided integrally with the armature shaft, and the yoke A motor with a speed reduction mechanism having a bottomed cylindrical gear case coupled to the opening of the motor, and a reduction gear mechanism that is rotatably accommodated in the gear case and meshes with the worm to reduce the rotation of the armature,
The reduction gear mechanism is
A drive rotor that includes gear teeth that mesh with the worm on an outer peripheral surface, and whose one side surface in the axial direction faces the bottom of the gear case;
A driven rotator that is provided coaxially with the drive rotator and includes an output shaft that outputs the rotation of the armature;
Provided between the driving rotator and the driven rotator, allowing transmission of driving force from the driving rotator to the driven rotator, and transmitting driving force from the driven rotator to the driving rotator. A locking member that regulates
A through hole provided at the rotation center of the drive rotator and penetrating in the axial direction of the drive rotator;
A plurality of convex portions provided in the through hole and projecting radially inward of the through hole;
A pressing leg provided on the driven rotating body, extending toward the bottom of the gear case and inserted between the convex portions of the driving rotating body;
A main body cylinder portion provided on the lock member and inserted radially inside of the plurality of convex portions;
A flexible leg portion provided in the main body cylinder portion, extending toward the bottom portion of the gear case, and being inserted in a pair with the pressing leg portion between the convex portions of the drive rotating body;
It is provided between the pressing leg and the support member so as to protrude radially outward from the flexible leg, and when the driving force is transmitted from the driven rotating body to the driving rotating body, A motor with a speed reduction mechanism, comprising: a pressed piece pressed against the bottom of the gear case.   The motor with a speed reduction mechanism according to claim 6, wherein a concave or convex first opposing surface portion is formed in a portion of the pressing leg portion facing the pressed piece, and the pressing piece is opposed to the pressing leg portion. A convex or concave second opposing surface portion facing the first opposing surface portion is formed in the portion, and the first opposing surface portion presses the second opposing surface portion by relative rotation of the driven rotating body and the lock member. Thus, the flexible leg is elastically deformed, and the pressed piece is pressed against the bottom of the gear case.   8. The motor with a speed reduction mechanism according to claim 6 or 7, wherein an elastic member is provided between a bottom portion of the gear case and the pressed piece, and the elastic member is transmitted when driving force is transmitted from the driving rotating body to the driven rotating body. A motor with a speed reduction mechanism, wherein a gap is formed between the pressing piece and the pressed piece.   9. The motor with a speed reduction mechanism according to claim 8, wherein the elastic member is made of an annular rubber having a substantially circular cross section.   The motor with a speed reduction mechanism according to any one of claims 6 to 9, wherein a shaft hole penetrating in the axial direction is provided at the rotation center of the main body cylinder portion, and the center extends in the axial direction at the rotation center of the driven rotating body. A motor with a speed reduction mechanism, wherein a shaft is provided, and the central shaft is rotatably inserted into the shaft hole.

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