JP2005226768A - Rotational driving force transmission mechanism and motor apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotational driving force transmission mechanism capable of reducing a possibility that a rubber body is bitten when the rubber body is compressed. <P>SOLUTION: In a rotational driving force transmission structure, an output plate 15 is coaxially and rotatably fitted to a rotatingly driven worm wheel 13, and the damper part 25 of a rubber damper 14 is interposed between an input side support surface 23a formed on the worm wheel 13 and an output side support surface 28a formed on the output plate 15 in the circumferential direction. In the rotational driving force transmission structure, the rotational force of the input side support bearing 23a based on the rotation of the worm wheel 13 is transmitted to the output side support surface 28a through the damper part 25 to rotate the output plate 15. Then, the input side support surface 23a and the output side support surface 28a (entire surfaces thereof) form a recessed surface having perpendiculars L1 and L2 thereof facing the radial inner side of the circumferential direction (direction of tangent LZ thereof). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotational drive force transmission structure and a motor device that transmit rotational drive force via a rubber damper (rubber body).

  2. Description of the Related Art Conventionally, a motor device for a power window device or the like includes a motor body that rotationally drives a rotating shaft, and a speed reducing portion that includes a worm gear that reduces the rotation of the rotating shaft. As such a motor device, an output side rotating body is provided so as to be rotatable about the same center as the worm wheel, an input side support surface provided on the worm wheel, and an output side support provided on the output side rotating body. Some have rubber bodies (rubber dampers) interposed between them and the circumferential direction. As such a motor device, an accommodation recess is formed on one side of the worm wheel, an input-side projection having an input-side support surface is erected from the bottom of the accommodation recess, and an output is provided in the accommodation recess. There is one that accommodates (at least partly) an output-side convex portion having a side support surface and a rubber body (see, for example, Patent Document 1). In such a motor device, the axial size of the worm wheel can be prevented from increasing while the axial thickness of the outer edge (tooth portion) of the worm wheel is secured. In such a motor device, the rubber body is restricted from moving radially outward on the outer peripheral wall surface, which is the peripheral wall surface of the housing recess of the worm wheel. An output shaft is connected to the output side rotating body, and the output shaft is connected to the vehicle window via a regulator or the like.

In such a motor device, the rotational force of the input side support surface based on the rotation of the worm wheel is transmitted to the output side support surface via the rubber body, and the output side rotation body is rotated. Further, in such a motor device (rotational driving force transmission structure), for example, when the output side rotating body is subjected to a sudden load during rotation of the worm wheel, the impact between the worm wheel and the output side rotating body is rubber. It is suppressed by elastic deformation of the body.
Japanese Patent Laid-Open No. 10-318297

  By the way, in the motor device as described above, when a sudden load is applied to the output side rotating body during rotation of the worm wheel and the rubber body is compressed, the rubber body is separated from the outer peripheral wall surface and the output side support surface. There is a possibility of being caught between the output side convex part provided with or the input side convex part provided with the input side support surface. That is, as schematically shown in FIG. 9, for example, when viewed from the axial direction of the worm wheel 50, the radially outer end (outer corner 52) at the circumferential end of the rubber body 51 has an R shape. As shown in FIG. 10, when the rubber body 51 is compressed, the outer corner portion 52 bulges radially outward and is caught between the outer peripheral wall surface 53 and the output-side convex portion 55 provided with the output-side support surface 54. There is a fear. In FIG. 9 and FIG. 10, the input-side convex portion 57 having the input-side support surface 56 is formed continuously with the outer peripheral wall surface 53 (so that there is no gap). When the body 51 is compressed, the outer corner portion 52 may be caught between the outer peripheral wall surface 53 and the input side convex portion. This causes the rubber body 51 to be worn or damaged, and as a result, the cushion characteristics of the rubber body 51 change.

  In the case where the rubber body is subjected to a surface treatment (chlorine treatment) and its friction coefficient is reduced to prevent the biting, the surface treatment increases the manufacturing cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotational drive force transmission structure and a motor device that can reduce the biting of the rubber body when the rubber body is compressed. Is to provide.

  In the first aspect of the present invention, an output side rotator is provided so as to be rotatable about a coaxial center with respect to the rotationally driven input side rotator, the input side support surface provided on the input side rotator, and A rubber body is interposed in a circumferential direction with the output side support surface provided on the output side rotary body, and the rotational force of the input side support surface based on the rotation of the input side rotary body is passed through the rubber body. It is a structure for transmitting a rotational driving force that is transmitted to the output side support surface and rotates the output side rotating body, and at least one of the input side support surface and the output side support surface is perpendicular to the circumferential direction. A lead-in surface facing inward in the radial direction was formed.

According to a second aspect of the present invention, in the rotational driving force transmission structure according to the first aspect, the pull-in surface is formed on at least one of the input side support surface and the output side support surface.
According to a third aspect of the present invention, in the rotational driving force transmission structure according to the first aspect, the drawing surface is formed at a radially outer end portion of at least one of the input side support surface and the output side support surface. did.

  According to a fourth aspect of the present invention, in the rotational driving force transmission structure according to any one of the first to third aspects, the lead-in surface is formed on the input-side support surface and the output-side support surface. These shapes were the same pattern.

  According to a fifth aspect of the present invention, there is provided the rotational driving force transmission structure according to any one of the first to fourth aspects, and a motor body that rotationally drives the input-side rotator. Motor device.

(Function)
According to the first aspect of the present invention, for example, when a sudden load is applied to the output side rotating body during rotation of the input side rotating body, the impact between the input side rotating body and the output side rotating body is applied to the rubber body. Can be suppressed. In addition, since at least one of the input side support surface and the output side support surface is provided with a drawing surface whose perpendicular is directed radially inward from the circumferential direction, the rubber body has a diameter at the drawing surface when the rubber body is compressed. Receives force toward the inside. Therefore, when the rubber body is compressed, the rubber body is prevented from bulging outward in the radial direction, and includes an outer peripheral wall surface disposed on the radially outer side of the rubber body and an output side support surface or an input side support surface. The biting between the convex portions can be reduced as compared with the prior art.

  According to the second aspect of the present invention, the drawing surface is formed on the entire surface of at least one of the input side support surface and the output side support surface. Therefore, when the rubber body is compressed, the entire surface of the rubber body is the drawing surface. To receive force toward the inside in the radial direction. Therefore, when the rubber body is compressed, the rubber body is prevented from bulging outward in the radial direction, and includes an outer peripheral wall surface disposed on the radially outer side of the rubber body and an output side support surface or an input side support surface. Biting between the convex portions can be reduced as compared with the prior art.

  According to the third aspect of the present invention, since the drawing surface is formed at the radially outer end of at least one of the input side support surface and the output side support surface, the rubber body is compressed when the rubber body is compressed. The radially outer end receives a force directed radially inward at the drawing surface. Therefore, when the rubber body is compressed, the rubber body is prevented from bulging outward in the radial direction, and includes an outer peripheral wall surface disposed on the radially outer side of the rubber body and an output side support surface or an input side support surface. Biting between the convex portions can be reduced as compared with the prior art.

  According to the fourth aspect of the present invention, the lead-in surface is formed on the input-side support surface and the output-side support surface and the shape thereof is the same pattern. And can be easily assembled.

  According to the invention described in claim 5, the effect of the invention described in any one of claims 1 to 4 can be obtained in the motor device.

According to invention of Claims 1-4, the transmission structure of the rotational drive force which can reduce that a rubber body is bitten at the time of compression of a rubber body can be provided.
According to the invention described in claim 5, it is possible to provide a motor device provided with a rotational driving force transmission structure capable of reducing the biting of the rubber body when the rubber body is compressed.

Hereinafter, an embodiment in which the present invention is embodied in a motor device for a power window device will be described with reference to FIGS.
As shown in FIG. 1, the motor device 1 includes a motor main body 10 and a speed reduction unit 11. The motor body 10 includes a rotation shaft (not shown) and rotationally drives the rotation shaft. The speed reduction unit 11 includes a housing 12, a worm wheel 13 as an input side rotating body, a rubber damper 14, an output plate 15 as an output side rotating body, an output shaft 16, a lid 17, and the like.

  The housing 12 is made of a synthetic resin and includes a motor fixing portion 12a, a worm accommodating portion 12b, and a wheel accommodating portion 12c. The motor fixing portion 12a is fixed to the motor main body 10 (yoke), and the worm accommodating portion 12b formed on the shaft center of the motor main body 10 has a worm (not shown) that rotates integrally with the rotating shaft of the motor main body 10. Is housed. A part of the worm is exposed in the wheel accommodating portion 12c.

  The wheel accommodating portion 12c is formed in a substantially bottomed cylindrical shape, and a cylindrical shaft support portion 18 is erected at the center of the upper surface of the bottom plate portion. A shaft hole 18 a extending in the axial direction is formed in the shaft support portion 18. And the worm wheel 13 is accommodated in the wheel accommodating part 12c.

  The worm wheel 13 is made of a synthetic resin and has a substantially bottomed cylindrical shape. Specifically, as shown in FIGS. 1 and 2, the worm wheel 13 includes a substantially disk-shaped disk portion 20 and an outer peripheral wall 21 erected from the outer peripheral edge of the disk portion 20. A tooth portion H to be engaged with the worm is formed on the outer peripheral surface of the worm. A cylindrical inner peripheral wall 22 is erected in the center of the disk portion 20 in the same direction as the outer peripheral wall 21. In the disk portion 20, an input-side convex portion 23 is erected between the outer peripheral wall 21 and the inner peripheral wall 22 in the same direction as the outer peripheral wall 21. Three input-side convex portions 23 of the present embodiment are formed at equiangular intervals. Further, as shown in FIG. 2, the input-side convex portion 23 is formed continuously with the outer peripheral wall 21 (so that there is no gap) and formed with a gap with the inner peripheral wall 22. Both side surfaces of the input side convex portion 23 (surfaces intersecting the circumferential direction of the worm wheel 13) are input side support surfaces 23a. Further, the upper surface of the disk portion 20 (the surface on the side where the outer peripheral wall 21 is erected), the outer peripheral wall surface 21a that is the inner peripheral surface of the outer peripheral wall 21, the inner peripheral wall surface 22a that is the outer peripheral surface of the inner peripheral wall 22, and the input A portion surrounded by the side support surface 23 a constitutes the damper accommodating portion 24. And the worm wheel 13 is accommodated in the wheel accommodating part 12c while the shaft support part 18 is fitted in the inner peripheral wall 22 and rotatably supported. At this time, the tooth portion H of the worm wheel 13 is engaged with the worm (not shown) exposed in the wheel housing portion 12c.

  As shown in FIGS. 1 and 3, the rubber damper 14 has a shape obtained by dividing an annular plate material in the circumferential direction, and has a substantially trapezoidal shape when viewed from the axial direction (with a short side out of two sides parallel in the radial direction). A plurality of (in this embodiment, six (three sets)) damper portions 25 as rubber bodies, and a connecting portion 26 that connects each of the damper portions 25 in an annular shape at the radially inner end thereof, It has.

  The diameter of a circle passing through the outermost side of the rubber damper 14, that is, the outer peripheral side surface (radially outer surface) of the damper portion 25 in this embodiment is substantially the same as the diameter of the outer peripheral wall surface 21 a (see FIG. 2). The outer peripheral side surface is set so as to be substantially inscribed in the outer peripheral wall surface 21a. Further, the diameter of a circle passing through the innermost side of the rubber damper 14, that is, in the present embodiment, the inner peripheral side surface (the inner surface in the radial direction) of the connecting portion 26 is substantially equal to the diameter of the inner peripheral wall surface 22a (see FIG. 2). It is the same, and the inner peripheral wall surface is set so as to substantially circumscribe the inner peripheral wall surface 22a. Further, the inner peripheral side surface (radially inner surface) 25a of the damper portion 25 in the present embodiment is formed so as to be recessed outward, and is set so as not to contact the inner peripheral wall surface 22a. Moreover, the outer corner | angular part 25b which is a radial direction outer side edge part in the circumferential direction edge part of the damper part 25 is formed in R shape (refer FIG. 6).

  As shown in FIG. 5, the rubber damper 14 is accommodated in the damper accommodating portion 24 so that the two adjacent damper portions 25 are accommodated in the respective chambers partitioned by the input-side convex portion 23. . At this time, the side surface of the damper portion 25 (a surface intersecting the circumferential direction of the rubber damper 14) is brought into contact with the input side support surface 23a of each input side convex portion 23.

  The output plate 15 is made of metal and is formed in a substantially disc shape as shown in FIGS. 1 and 4, and a shaft fitting portion 27 is formed at the center thereof. Further, an output-side convex portion 28 is erected on the lower surface of the output plate 15 (the front side surface in FIG. 4 and the surface facing the worm wheel 13). Three output-side convex portions 28 of the present embodiment are formed at equiangular intervals. And the side surface (surface which cross | intersects the circumferential direction of the output board 15) of this output side convex part 28 is made into the output side support surface 28a.

  Then, the output plate 15 is fitted so that the output-side convex portion 28 is interposed between the two adjacent damper portions 25 as shown in FIG. At this time, the side surface (surface intersecting the circumferential direction of the rubber damper 14) of the damper portion 25 is brought into contact with the output side support surface 28a of each output side convex portion 28. Also, with the above configuration, the damper portion 25 is interposed between the input side support surface 23a and the output side support surface 28a in the circumferential direction.

  As shown in FIG. 1, the output shaft 16 has a fitting portion 32 that can be fitted to the shaft fitting portion 27 at one end of the shaft portion 31, and a gear portion 33 at the other end of the shaft portion 31. Is formed. The output shaft 16 is inserted into the shaft hole 18a from the fitting portion 32 side, the fitting portion 32 is fitted into the shaft fitting portion 27, and is formed on the distal end side of the fitting portion 32. The fixing ring 34 is fixed to the engaging groove 32a to prevent the engagement ring 32a from coming off, and the shaft supporting portion 18 is rotatably supported. The output shaft 16 is engaged with a gear portion of a regulator (not shown) and the gear portion 33 is connected to a vehicle window (side glass) via the regulator.

The lid 17 is fixed to the housing 12 so as to cover the opening of the wheel accommodating portion 12c.
Here, the input-side support surface 23a and the output-side support surface 28a (the entire surface thereof) are arranged such that their perpendicular lines L1 and L2 are in the circumferential direction (as viewed from the axial direction), as shown in FIGS. A lead-in surface is formed that faces radially inward from the (tangential LZ direction). In the present embodiment, both input-side support surfaces 23a, which are both side surfaces of the input-side convex portion 23, are formed to be inclined with respect to the radial direction so as to be separated toward the radially outer side ( (See FIG. 2). Further, both output-side support surfaces 28a, which are both side surfaces of the output-side convex portion 28, are formed so as to be inclined with respect to the radial direction so as to be separated toward the outer side in the radial direction (see FIG. 4). . And the shape of the input side support surface 23a and the output side support surface 28a (both drawing-in surfaces) is made into the same pattern (same inclination angle and length).

Next, the operation of the motor device (power window device) configured as described above will be described.
When power is supplied to the motor device based on the operation of a power window switch provided on a vehicle (not shown), the worm is driven to rotate together with the rotating shaft of the motor body 10, and the worm wheel 13 is rotated based on the rotation of the worm. To do. Then, the rotational force of the input side support surface 23 a based on the rotation of the worm wheel 13 is transmitted to the output side support surface 28 a via the damper portion 25, and the output shaft 16 rotates together with the output plate 15. Then, the vehicle window is raised and lowered via a regulator or the like.

  For example, when the vehicle window hits the window frame and the movement is restricted when the vehicle window is raised, the rotation of the output shaft 16 and the output plate 15 is restricted. At this time, the compressive force that one of the two adjacent damper portions 25 receives from the input-side support surface 23a and the output-side support surface 28a suddenly increases. During the compression, the damper portion 25 receives a force F (see FIG. 6) directed radially inward at the input side support surface 23a and the output side support surface 28a (retraction surface). Therefore, when the damper portion 25 is compressed, the damper portion 25 (outer corner portion 25b) is prevented from bulging outward in the radial direction, and between the outer peripheral wall surface 21a and the output side convex portion 28 (the outer peripheral side surface). Biting is reduced. As described above, even when a sudden load is applied to the output plate 15 and the output shaft 16, the damper portion 25 is elastically deformed, so that the impact between the worm wheel 13 and the output plate 15, and the worm wheel 13 and the worm The shock applied to (the meshing portion) and the like is suppressed by the damper portion 25.

Next, characteristic effects of the above embodiment will be described below.
(1) The input side support surface 23a and the output side support surface 28a (the entire surface thereof) form a lead-in surface in which the perpendiculars L1 and L2 are directed radially inward from the circumferential direction (the tangential line LZ direction). Therefore, when the damper portion 25 is compressed, the damper portion 25 receives a force F (see FIG. 6) directed radially inward at the input side support surface 23a and the output side support surface 28a (retraction surface). Therefore, when the damper portion 25 is compressed, the damper portion 25 (outer corner portion 25b) is prevented from bulging outward in the radial direction, and between the outer peripheral wall surface 21a and the output side convex portion 28 (the outer peripheral side surface). Biting is reduced compared to the prior art. Thereby, wear and breakage of the damper portion 25 can be reduced, and durability can be improved. Further, it is possible to omit the surface treatment (chlorine treatment) applied to the damper portion 25 (rubber damper 14) in order to reduce the friction coefficient, and thus the manufacturing cost can be reduced.

  (2) Since the shape of the input side support surface 23a and the output side support surface 28a (both lead-in surfaces) is the same pattern, it is possible to eliminate the directionality when the damper portion 25 (rubber damper 14) is assembled. That is, there is no need to distinguish and attach the front and back of the rubber damper 14, and the assembly can be facilitated.

  (3) Since the input side support surface 23a, the output side support surface 28a, and the damper portion 25 are provided in a plurality (sets) in the circumferential direction, the worm can be used when a sudden load is applied to the output plate 15 and the output shaft 16. The impact between the wheel 13 and the output plate 15 can be suppressed in the circumferential direction by a plurality of damper portions 25 with a good balance. Moreover, since the damper portion 25 is annularly connected by the connecting portion 26 at its radially inner end, a plurality of damper portions 25 can be used as one member (rubber damper 14). Therefore, the number of parts is reduced, and as a result, assembly costs and the like can be reduced.

The above embodiment may be modified as follows.
In the above embodiment, the entire surface of the input side support surface 23a and the output side support surface 28a is the pull-in surface, but the pull-in surface is oriented so that the perpendicular is directed radially inward from the circumferential direction (its tangential direction). If it is formed in at least a part of at least one of the input side support surface and the output side support surface, the input side support surface and the output side support surface may be changed to other shapes.

  For example, you may change the output side convex part 28 of the said embodiment into the output side convex part 41 shown in FIG. Specifically, the output side convex portion 41 has a side surface (a surface intersecting the circumferential direction) as an output side support surface 41a. A pulling surface 41b is formed at the radially outer end of the output-side support surface 41a so that the perpendicular L3 is directed radially inward from the circumferential direction (its tangential LZ direction). In this example as well, it is desirable that the output side support surface 41a (withdrawal surface 41b) and the input side support surface (withdrawal surface) (not shown) have the same pattern (the same inclination angle and length). In these cases, it is necessary to change the shape of the rubber damper (damper portion 42) according to the output-side support surface 41a (the pull-in surface 41b) and the input-side support surface (the pull-in surface). Even if it does in this way, at the time of compression of damper part 42, damper part 42 will receive the force which the diameter direction outside end part goes to the diameter direction inner side in drawing-in surface 41b. Therefore, when the damper portion 42 is compressed, the damper portion 42 is restrained from bulging outward in the radial direction, and is conventionally bitten between the outer peripheral wall surface 21a and the output-side convex portion 41 (the outer peripheral side surface). Reduced compared to technology. In addition, the output side support surface 41a (drawing surface 41b) and the input side support surface (drawing surface) (not shown) have the same pattern (the same inclination angle and length), so that the effect of the above embodiment ( The same effect as 2) can be obtained.

  Further, for example, the output side convex portion 28 in the above embodiment may be changed to an output side convex portion 43 shown in FIG. Specifically, the output side convex portion 43 has a side surface (a surface intersecting the circumferential direction) as an output side support surface 43a. A curved lead-in surface 43b is formed at the radially outer end of the output-side support surface 43a so that the perpendicular L4 faces radially inward from the circumferential direction (its tangential LZ direction). In this example as well, it is desirable that the output side support surface 43a (withdrawal surface 43b) and the input side support surface (withdrawal surface) (not shown) have the same pattern (the same inclination angle and length). In these cases, it is necessary to change the shape of the rubber damper (damper portion 44) in accordance with the output side support surface 43a (the pull-in surface 43b) and the input side support surface (the pull-in surface). Even in this case, during the compression of the damper portion 44, the damper portion 44 receives a force toward the radially inner side at the drawing surface 43b at the radially outer end thereof. Therefore, when the damper portion 44 is compressed, the damper portion 44 is restrained from bulging outward in the radial direction, and is conventionally bitten between the outer peripheral wall surface 21a and the output-side convex portion 43 (the outer peripheral side surface). Reduced compared to technology. In addition, the shape of the output side support surface 43a (the pull-in surface 43b) and the input side support surface (the pull-in surface) (not shown) have the same pattern (the same inclination angle and length), so that the effect of the above embodiment ( The same effect as 2) can be obtained. Of course, the output side support surfaces 28a, 41a, 43a and the input side support surface 23a may have different patterns. Further, as in the above embodiment, if the input side convex portion 23 is formed continuously with the outer peripheral wall 21 (so that there is no gap), the damper portion 25 has the outer peripheral wall surface 21a and the input side convex portion 23 (the outer periphery). The input side support surface of the input side convex portion may have a shape in which no pull-in surface is formed. Also, of course, contrary to the above embodiment, when applied to the case where the output side convex portion is formed continuously with the outer peripheral wall (so that there is no gap), the damper portion is the outer peripheral wall surface and the output side convex portion. Since it is not bitten between (the outer peripheral side surface), the output-side support surface of the output-side convex portion may have a shape in which the drawing surface is not formed.

  In the above-described embodiment, the damper portion 25 is connected to the connecting portion 26 in a ring shape at the radially inner end thereof. However, each damper portion 25 is not connected to the independent member (approximately the damper portion 25). Six rubber dampers having the same shape may be used.

  In the above embodiment, the input side support surface 23a, the output side support surface 28a, and the damper portion 25 are provided in a plurality (three sets) in the circumferential direction. The number may be changed as appropriate. It should be noted that in the case of being driven to rotate in only one direction, a set is not necessary. Therefore, it is good also as an input side support surface, an output side support surface, and a damper part one each.

  In the above embodiment, the motor device for the power window device is embodied, but the motor device for other devices may be embodied. In addition to the motor device, it is only necessary to have a structure for transmitting the rotational driving force that transmits the rotational force of the input-side rotating body that is rotationally driven through the rubber body (damper part) to rotate the output-side rotating body. It may be embodied in other devices.

The technical idea that can be grasped from the above embodiments will be described below together with the effects thereof.
(A) An output-side rotator is provided so as to be rotatable about the same axis as the rotationally driven input-side rotator, an input-side support surface provided on the input-side rotator, and an output-side rotator. A rubber body is interposed between the output side support surface and the output side support surface, and the rotational force of the input side support surface based on the rotation of the input side rotation body is applied to the output side support surface via the rubber body. A rotational driving force transmission structure for transmitting and rotating the output-side rotating body, wherein the rubber body is compressed in the radial direction when the rubber body is compressed on at least one of the input-side support surface and the output-side support surface. A structure for transmitting a rotational driving force, characterized in that a pull-in surface is formed so that an inward force is applied. If it does in this way, the force which goes to radial direction inner side will be applied to a rubber body at the time of compression at the time of compression of a rubber body. Therefore, when the rubber body is compressed, the rubber body is prevented from bulging outward in the radial direction, and includes an outer peripheral wall surface disposed on the radially outer side of the rubber body and an output side support surface or an input side support surface. Biting between the convex portions can be reduced as compared with the prior art.

  (B) The rotational drive force transmission structure according to any one of claims 1 to 3, wherein the pull-in surface is formed on the input-side support surface and the output-side support surface. Power transmission structure. If it does in this way, since a drawing surface is formed in an input side support surface and an output side support surface, at the time of compression of a rubber body, a rubber body receives the force which goes to a diameter direction inner side in both drawing surfaces.

  (C) In the rotational drive force transmission structure according to any one of claims 1 to 4 and (A) and (B) above, the input side support surface, the output side support surface, and the rubber body Are provided in a circumferential direction, and the rubber body is connected in a ring shape at a radially inner end portion thereof at a connecting portion. In this way, when a sudden load is applied to the output side rotator during rotation of the input side rotator, the impact between the input side rotator and the output side rotator is balanced in the circumferential direction by the plurality of rubber bodies. Can be suppressed. Moreover, a plurality of rubber bodies can be used as one member (rubber damper), the number of parts can be reduced, and assembling costs can be reduced.

The principal part disassembled perspective view of the motor apparatus in this Embodiment. The top view of the worm wheel in this Embodiment. The top view of the rubber damper in this Embodiment. The bottom view of the output board in this Embodiment. Explanatory drawing for demonstrating the transmission structure of the rotational drive force in this Embodiment. The elements on larger scale for demonstrating the transmission structure of the rotational driving force in this Embodiment. The elements on larger scale for demonstrating the transmission structure of the rotational drive force in another example. The elements on larger scale for demonstrating the transmission structure of the rotational drive force in another example. Explanatory drawing for demonstrating the transmission structure of the rotational drive force in a prior art. Explanatory drawing for demonstrating the transmission structure of the rotational drive force in a prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motor main body, 13 ... Worm wheel (input side rotary body), 15 ... Output plate (output side rotary body), 23a ... Input side support surface (drawing surface), 25 ... Damper part (rubber body), 28a ... Output Side support surface (drawing surface), 41a, 43a ... output side support surface, 41b, 43b ... drawing surface, L1-L4 ... perpendicular line.

Claims (5)

An output-side rotator is provided to be rotatable about the same axis as the rotationally driven input-side rotator, an input-side support surface provided on the input-side rotator, and an output provided on the output-side rotator. A rubber body is interposed between the side support surface and the circumferential direction, and the rotational force of the input side support surface based on the rotation of the input side rotation body is transmitted to the output side support surface via the rubber body. A structure for transmitting a rotational driving force for rotating the output-side rotator,
A structure for transmitting a rotational driving force, wherein at least one of the input side support surface and the output side support surface is formed with a drawing surface whose perpendicular is directed radially inward from the circumferential direction. The structure for transmitting a rotational driving force according to claim 1,
A structure for transmitting a rotational driving force, wherein the pull-in surface is formed on at least one of the input-side support surface and the output-side support surface. The structure for transmitting a rotational driving force according to claim 1,
A structure for transmitting a rotational driving force, wherein the drawing surface is formed at a radially outer end portion of at least one of the input side support surface and the output side support surface. In the rotation drive force transmission structure according to any one of claims 1 to 3,
A structure for transmitting a rotational driving force, wherein the pull-in surfaces are formed on the input-side support surface and the output-side support surface, and the shapes thereof are the same pattern.   5. A motor device comprising: the rotational drive force transmission structure according to claim 1; and a motor main body that rotationally drives the input-side rotating body.

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