JP2008196706A - Rotatory driving force transmission structure and motor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend a service life of a rubber body for buffering a rotatory driving force to transmit. <P>SOLUTION: Each damper part 25 of a rubber damper 14 is supported in a circumferential direction of a rotation axis between a side face 23a of an engaging part 23, provided in a damper accommodating part 22 for accommodating the rubber damper 14, and a side face 29a of an engaging projecting part 29 provided in an output plate 15. A space part 27 for allowing elastic deformation of the damper part 25 is provided on an inner side face 25c side of each damper part 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotational driving force transmission structure in a motor device used for a power window device of a vehicle, for example, and a motor device provided with the rotational driving force transmission structure.

  Conventionally, for example, in a motor device of a power window device that opens and closes a side glass for a vehicle, as shown in FIG. 7, a worm fixed to an output shaft (not shown) of a motor body 50 rotates and drives the worm wheel 51. The output plate 53 and the output shaft 54 are rotationally driven via the rubber damper 52.

  The worm wheel 51 to which the rotation is transmitted via the rubber damper 52 and the output plate 53 are arranged on the same rotation axis. The rubber damper 52 is accommodated in an annular damper accommodating portion 55 formed inside the worm wheel 51, and is held in the rotational axis direction by the bottom plate portion of the worm wheel 51 and the output plate 53.

  The rubber damper 52 includes a plurality of fan-shaped damper portions 56. And each damper part 56 is each in the fan-shaped space part divided by the some engagement part 57 provided in the damper accommodating part 55, and the some engagement convex part 58 provided in the output board 53, respectively. Has been placed. That is, as shown in FIG. 8, each damper portion 56 is sandwiched in the same circumferential direction between the side surface 57a of the engaging portion 57 and the side surface 58a of the engaging convex portion 58 that are adjacent in the circumferential direction of the rotation axis. It is interposed between the worm wheel 51 and the output plate 53 so as to be supported in the state.

  When the motor 50 rotates and the side glass is raised, if the side glass hits the window frame and the rise is restricted, the rotation of the output plate 53 is restricted, and the rotation of the worm wheel 51 via each damper portion 56 is prevented. Be regulated. At this time, as shown in FIG. 9, each damper portion 56 is elastically deformed by being compressed in the circumferential direction and expanded in the radial direction by a large rotational driving force applied in the circumferential direction of the rotation axis. For this reason, the force which stops the motor 50 is absorbed by each damper part 56, and the impact which generate | occur | produces in the motor 50 is buffered.

  However, in the motor device described above, there is a case where each damper portion 56 is cracked or does not return to its original shape at an early point in use. And each damper part 56 did not fully absorb driving force, and the shock was not fully buffered.

  This is because each damper portion 56 is supported in the radial direction by the outer inner peripheral surface 55a and the inner inner peripheral surface 55b of the damper accommodating portion 55, so that each damper portion 56 sufficiently expands in the radial direction. This is considered to be due to the fact that it cannot be elastically deformed. That is, when elastic deformation in the radial direction of each damper portion 56 is restricted by the outer inner peripheral surface 55a and the inner inner peripheral surface 55b, a reaction force in the radial direction is applied to each damper portion 56 from each surface 55a, 55b. For this reason, it is considered that the stress generated in each damper portion 56 due to the elastic deformation by the rotational driving force increases correspondingly, and the elastic deterioration of each damper portion 56 is promoted. As a result, it is considered that the life of each damper portion 56 is shortened.

  The present invention has been made to solve the above-described problems, and its object is to provide a rotational drive force transmission structure capable of extending the life of a rubber body that buffers the rotational drive force to be transmitted, and An object of the present invention is to provide a motor device having a structure for transmitting the rotational driving force.

  In order to solve the above problem, the invention according to claim 1 is arranged such that an output side rotating body is arranged on the same rotation axis with respect to an input side rotating body that is rotationally driven, and a plurality of inputs are input to the input side rotating body. A side support surface is provided, and a plurality of output side support surfaces are provided on the output-side rotator. Between the outer inner peripheral surface of the input-side rotator and the inner outer peripheral surface of the outer diameter R2 around the rotation axis. And a rubber body is accommodated between the input side support surface and the output side support surface, and the rubber body is supported between the input side support surface and the output side support surface in a circumferential direction with respect to the rotation axis. In the rotational driving force transmission structure for transmitting the rotational driving force from the input-side rotating body to the output-side rotating body via the rubber body, the plurality of rubber bodies are connected in a ring shape by connecting portions. An annular member formed by the rubber body and the connecting portion. Of the inner surface of each rubber body and the inner surface of each connecting portion, only the inner surface of each connecting portion circumscribes the inner outer peripheral surface at the position of the outer diameter R2, and the inner surface of the rubber body with respect to the rotation axis On the circumferential side, the inner surface of the rubber body is formed so as to be recessed toward the outer surface side of the rubber body from the position of the outer diameter R2, so that the rubber body is elastically deformed between the inner peripheral surface. An allowable half-moon-shaped space is provided, and the annular member is configured such that the inner surface of each rubber body does not contact the inner peripheral surface by the space. It is a transmission structure.

The invention according to claim 2 is the invention according to claim 1, wherein the rubber body is formed such that an outer surface thereof is inscribed in the outer peripheral surface.
The invention according to claim 3 is provided with a motor main body, a plurality of input side support surfaces, an input side rotating body that is rotationally driven by the motor main body, a plurality of output side support surfaces, and the input side An output-side rotator disposed on the same rotation axis as the rotator, an outer inner peripheral surface of the input-side rotator and an inner outer peripheral surface of an outer diameter R2 around the rotation axis, and the input In a motor device comprising a rubber body housed between a side support surface and the output side support surface and supported in a circumferential direction with respect to the rotation axis between the input side support surface and the output side support surface, In the plurality of rubber bodies, adjacent rubber bodies are connected in a ring shape by a connecting portion, and in the annular member formed by the rubber body and the connecting portion, each of the inner side surface of each rubber body and the inner side surface of each connecting portion Only the inner side of the connecting part is at the outer diameter R2. So that the inner surface of the rubber body is recessed closer to the outer surface side of the rubber body than the position of the outer diameter R2 on the inner peripheral side of the rubber body with respect to the rotation axis. A half-moon-shaped space portion that allows elastic deformation of the rubber body is provided between the inner peripheral surface and the inner peripheral surface of the rubber member. The motor device is configured not to contact an outer peripheral surface.

The invention according to claim 4 is the invention according to claim 3, wherein the rubber body is formed such that an outer surface thereof is inscribed in the outer peripheral surface.
According to a fifth aspect of the present invention, in the invention according to the third or fourth aspect, the rubber body is disposed in a circumferential direction with respect to the rotational axis between the input side support surface and the output side support surface. The space portion is provided so as to exist at least in the sandwiched region, and the space portion is provided at a position where the region deviates in the radial direction with respect to the rotation axis.

  According to a sixth aspect of the present invention, in the invention according to any one of the third to fifth aspects, the input-side support surface and the output-side support surface are substantially in the circumferential direction with respect to the rotation axis. It is formed to be orthogonal.

(Function)
According to the first and second aspects of the present invention, when the rotation operation of the output side rotating body is restricted when the input side rotating body is driven to rotate, the input side engaging portion and the output side engaging portion are A large rotational driving force is applied to the rubber body interposed between them in the circumferential direction. Then, the rubber body tends to be elastically deformed by being compressed in the circumferential direction with respect to the rotation axis and expanding in the radial direction. At this time, the rubber body is elastically deformed so as to be sufficiently expanded in the radial direction by the space provided on the inner peripheral side thereof. For this reason, the increase in the stress by restricting sufficient elastic deformation in the radial direction is suppressed. Therefore, the stress generated in the rubber body generated by the rotational driving force to be absorbed is suppressed, and the characteristic deterioration of the rubber body is not promoted.

  According to the third to sixth aspects of the present invention, in the motor device that outputs the rotational driving force of the motor to the output side rotating body via the rubber body, the stress generated in the rubber body by the rotational driving force to be absorbed is generated. It is suppressed and the characteristic deterioration of the rubber body is not promoted.

  According to the fifth aspect of the present invention, the stress due to the rotational driving force is generated by being distributed over the entire portion of the rubber body existing in the region. Therefore, the concentration of stress generated in the rubber body by the rotational driving force is suppressed, and it is difficult to promote the deterioration of the characteristics of the rubber body due to the stress concentration.

  According to the sixth aspect of the present invention, since the radial force is hardly applied to the rubber body from each support surface, the rubber body is difficult to bend in the radial direction by the radial force. Therefore, the space portion only needs to allow the rubber body to expand in the radial direction by a circumferential force.

  According to the present invention, since the stress generated by the rotational driving force is suppressed in the rubber body that buffers the rotational driving force to be transmitted and the characteristic deterioration of the rubber body is not promoted, the life of the rubber body can be further extended.

Hereinafter, an embodiment in which the present invention is embodied in a motor device for a vehicle 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 has an output shaft (not shown) extending to the speed reduction unit 11 side. The speed reduction unit 11 includes a housing 12, a worm wheel 13 as an input side rotator, a rubber damper 14, an output plate 15 as an output side rotator, an output shaft 16, a lid 17, and the like.

  The housing 12 is integrally formed of synthetic resin and includes a motor fixing portion 12a, a worm housing portion 12b, and a wheel housing portion 12c. The motor main body 10 is fixed to the motor fixing portion 12a, and its output shaft extends into the worm accommodating portion 12b. A worm gear (not shown) is fixed to the output shaft, and a part of the worm gear is disposed 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 formed 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. Further, on the upper surface of the bottom plate portion of the wheel housing portion 12c, a plurality of convex support portions 19 are formed at equal angular intervals along the circumference of a circle centering on the central axis of the shaft hole 18a. The convex support portion 19 is formed to support the worm wheel 13. A worm wheel 13 is accommodated in the wheel accommodating portion 12c.

  The worm wheel 13 is integrally formed of a synthetic resin in a substantially bottomed cylindrical shape, and a gear portion 20 that meshes with the worm gear is formed on the outer peripheral surface thereof. A shaft hole 21 into which the shaft support portion 18 can be inserted is formed in the center of the worm wheel 13. Between the gear part 20 and the shaft hole 21, an annular damper accommodating part 22 for accommodating the rubber damper 14 is provided. The damper accommodating portion 22 is formed in a disc-shaped upper surface 22a centered on the central axis of the shaft hole 21, an outer inner peripheral surface 22b formed in the same cylindrical shape, and formed in the same cylindrical shape. It is formed by the inner inner peripheral surface 22c.

  Three engaging portions 23 are formed on the upper surface 22 a of the bottom plate portion of the damper accommodating portion 22. The engaging portions 23 are provided at equal angular intervals and are formed so as to extend from the outer inner peripheral surface 22b to the vicinity of the inner inner peripheral surface 22c in the radial direction. Each engagement portion 23 includes a side surface 23a as an input side support surface that is substantially orthogonal to the circumferential direction of the central axis of the shaft hole 21. Each engaging portion 23 divides the damper accommodating portion 22 into three substantially fan-shaped portions centered on the central axis. In other words, the damper accommodating portion 22 includes three chambers defined by the bottom plate portion upper surface 22a, the outer inner peripheral surface 22b, the inner inner peripheral surface 22c, and the side surface 23a. In addition, on the upper surface 22a of the bottom plate portion of the damper accommodating portion 22, a ridge portion 24 extending along the circumference of a circle centering on the central axis is formed. The worm wheel 13 has a shaft support portion 18 inserted through the shaft hole 21, each convex support portion 19 abuts on the bottom surface of the bottom plate portion, and the gear portion 20 is rotatable with the gear portion 20 engaged with the worm gear. It is accommodated in the accommodating part 12c. In other words, the worm wheel 13 is supported so as to be rotatable about the central axes of the shaft support portion 18 and the shaft hole 21 as rotation axes thereof. A rubber damper 14 is accommodated in the damper accommodating portion 22.

  The rubber damper 14 is integrally formed in an annular shape, and is provided with damper portions 25 as six rubber bodies formed into a shape obtained by dividing an annular plate material in the radial direction thereof, that is, substantially fan-shaped. Each damper part 25 is connected in an annular shape by a connecting part 26 on the inner peripheral side thereof. Each damper part 25 is formed in the same shape with the same thickness, and includes a side surface 25a that is substantially orthogonal to the circumferential direction with respect to the central axis of the rubber damper 14. As shown in FIG. 2, the outer surface 25b of each damper part 25 formed on the cylinder centering on the central axis of the rubber damper 14 has an outermost diameter R1. That is, as shown in FIG. 3, the rubber damper 14 is formed in such a size that the outer surface 25 b of each damper portion 25 is substantially inscribed to the outer inner peripheral surface 22 b of the damper accommodating portion 22.

  Further, in the rubber damper 14, the inner surface of each connecting portion 26 on the cylinder centering on the central axis is the innermost diameter R2. That is, the rubber damper 14 is formed in such a size that the inner surface of each connecting portion 26 circumscribes the inner inner peripheral surface 22 c of the damper housing portion 22. Moreover, the inner side surface 25c of each damper part 25 is formed so that it may dent in the outer peripheral side rather than innermost inner diameter R2. That is, the rubber damper 14 is formed so that the inner side surface 25c of each damper portion 25 does not contact the inner inner peripheral surface 22c.

  As shown in FIG. 3, the rubber damper 14 is accommodated in each chamber in which two adjacent damper portions 25 are partitioned by the respective engaging portions 23, and each engaging portion 23 is in a corresponding position. It is accommodated in the damper accommodating portion 22 in a state of being fitted in a gap between the side surfaces 25a of both damper portions 25. At this time, each damper portion 25 is accommodated with almost no gap between the outer inner peripheral surface 22b of the damper accommodating portion 22 and the outer outer surface 25b, and between the inner inner peripheral surface 22c and the inner side surface 25c. It is accommodated in a state in which a half moon space 27 is formed. The rubber damper 14 is supported so that each damper portion 25 does not contact the upper surface 22a of the bottom plate portion by the protrusion 24 of the damper accommodating portion 22 that abuts substantially at the center in the radial direction. Further, the output plate 15 is disposed above the rubber damper 14.

  As shown in FIG. 1, the output plate 15 is a metal plate formed in a substantially disc shape, and a shaft fitting portion 28 to which the output shaft 16 is fixed is formed at the center thereof. Further, three engaging convex portions 29 are formed on the lower surface 15 a of the output plate 15. The engaging projections 29 are provided at equiangular intervals and are formed to extend in the radial direction with respect to the central axis. Each engagement convex part 29 is provided with the side surface 29a as an output side support surface substantially orthogonal to the circumferential direction with respect to the center axis line of the output plate 15, and is fitted in the clearance gap between the side surfaces 25a of the adjacent damper part 25. Is formed. The output plate 15 is accommodated in the worm wheel 13 in a state in which the engagement convex portions 29 are fitted in the gaps between the side surfaces 25a of the corresponding damper portions 25.

  As shown in FIG. 3, each of the damper portions 25 is arranged in the circumferential direction in a state of being sandwiched between the side surfaces 23 a and the side surfaces 29 a of the engaging portion 23 and the engaging convex portion 29 that are adjacent to the rotation axis in the circumferential direction. It is supported. More specifically, each damper portion 25 has a fan-shaped region D sandwiched in the circumferential direction between the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29 with respect to the rotation axis, that is, the side surface 23a. In the annular region having a radius from the innermost peripheral side to the outermost peripheral side of the side surface 29a, the side surface 29a is provided so as to exist in a fan-shaped region D defined by both side surfaces 23a and 27a. That is, when a force is applied to each damper portion 25 so as to compress in the circumferential direction from the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29, the damper portion 25 existing in this region D Stress is generated mainly in the part and a reaction force in the circumferential direction is generated. The space portion 27 is provided at a position away from the region D on the radially inner side. And the space part 27 accept | permits the elastic deformation by the damper part 25 expanding radially inward, when the force of the circumferential direction is added with respect to the damper part 25. FIG. Further, the output shaft 16 is fitted into the shaft fitting portion 28 of the output plate 15 through the shaft hole 18 a of the shaft support portion 18.

  As shown in FIG. 1, the output shaft 16 includes a fitting portion 32 that fits the shaft fitting portion 28 at the upper end of the shaft portion 31, and a gear portion 33 at the lower portion of the shaft portion 31. The gear portion 33 is meshed with a drive side gear portion of a window regulator (not shown). The output shaft 16 has the shaft portion 31 penetrated through the shaft hole 18a of the shaft support portion 18 so as to be rotatable, and the fitting portion 32 is fitted into the shaft fitting portion 28 of the output plate 15 so as to be integrally rotatable. It is supported by the wheel accommodating part 12c in a state. The output shaft 16 is removed from the shaft fitting portion 28 and the shaft hole 18a by an E ring 34 engaged with an engagement groove 32a provided at the upper end of the fitting portion 32 protruding upward from the shaft fitting portion 28. It is fixed so that there is no. The output shaft 16 is provided with an O-ring 35 between the shaft portion 31 and the gear portion 33 for sealing between the shaft portion 31 and the shaft hole 18a.

The lid 17 is fixed to the housing 12 so as to cover the upper opening of the wheel accommodating portion 12c.
Next, the operation of the motor device configured as described above will be described.

  When the side glass hits the window frame when the side glass is raised, the movement of the output shaft 16 and the output plate 15 is restricted via the window regulator. At this time, the circumferential force applied to each damper portion 25 pressed against each engagement convex portion 29 of the output plate 15 by each engagement portion 23 of the worm wheel 13 increases rapidly. Then, each damper part 25 is elastically deformed so as to be compressed in the circumferential direction and expanded in the rotational axis direction.

  At this time, as shown in FIG. 4, each damper portion 25 is elastically deformed by expanding radially inward by a space portion 27 provided on the inner side surface 25 c side thereof. For this reason, the increase in the stress by restricting sufficient elastic deformation in the radial direction is suppressed. Therefore, the stress generated by the rotational driving force to be absorbed is suppressed, and the characteristic deterioration of the rubber body is not promoted.

  Further, each damper portion 25 is provided in a fan-shaped region D sandwiched in the circumferential direction with respect to the rotation axis between the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29, and the space portion 27 Is provided at a position outside the region D. For this reason, stress is distributed and generated in the entire portion of the damper portion 25 existing in the region D. Therefore, the concentration of stress generated in the damper portion 25 is suppressed, and the characteristic deterioration of the damper portion 25 is hardly promoted.

According to the embodiment described in detail above, the following effects can be obtained.
(1) In the present embodiment, each damper portion 25 of the rubber damper 14 housed in the damper housing portion 22 is sandwiched between the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29 in the circumferential direction of the rotation axis. To support. A space portion 27 that allows elastic deformation of the damper portion 25 in the radial direction is provided on the inner peripheral side of each damper portion 25. Therefore, since the stress generated by the rotational driving force is suppressed and the characteristic deterioration of each damper portion 25 is hardly promoted, the life of the rubber damper 14 can be extended.

  (2) In addition, in the present embodiment, each damper portion 25 is a fan-shaped region sandwiched in the circumferential direction between the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29 with respect to the rotation axis. D is provided so as to include D, and a space portion 27 is provided at a position on the inner peripheral side outside this region D. Accordingly, the concentration of stress generated in each damper portion 25 by the rotational driving force is suppressed, and the characteristic deterioration of each damper portion 25 due to the stress concentration is hardly promoted, so that the life of the rubber damper 14 can be further extended.

  (3) In addition, in this embodiment, the side surface 23a of the engaging portion 23 and the side surface 29a of the engaging convex portion 29 are formed so as to be substantially perpendicular to the circumferential direction with respect to the rotation axis. For this reason, it is difficult for radial force to be applied to the damper portion 25 from the side surfaces 23a and 29a, and the damper portion 25 is difficult to bend toward the space portion 27 side by this radial force. Accordingly, the space 27 only needs to allow the damper portion 25 to expand in the radial direction due to the force in the circumferential direction, so that the volume of the space 27 can be smaller and the transmission mechanism portion does not increase in size. .

Hereinafter, embodiments of the invention other than the above-described embodiment will be listed as other examples.
In the above embodiment, the space portion 27 is provided on the inner side surface 25c side of each damper portion 25. However, as shown in FIG. 5, the outer side surface 25b of each damper portion 25 is formed in a shape recessed on the rotating shaft side. Thus, the space portion 40 may be formed between the damper housing portion 22 and the outer inner peripheral surface 22b. Also in this case, since the stress generated by the rotational driving force to be absorbed is suppressed and the characteristic deterioration of each damper portion 25 is hardly promoted, the life of the rubber damper 14 can be further extended.

  In the above embodiment, the space portion 27 is formed by denting the inner side surface 25 c of each damper portion 25 of the rubber damper 14 toward the outer peripheral side with respect to the inner inner peripheral surface 22 c of the damper accommodating portion 22. By forming the inner side surface 25c of each damper portion 25 together with the inner side surface of each connecting portion 26 on the same cylinder, the damper portion 25 is newly provided with a recess in the inner inner peripheral surface 22c for each damper portion 25. A space portion may be formed on the inner surface 25 c side of the 25.

Similarly, a space portion may be formed on the outer peripheral side of the damper portion 25 by providing a concave portion on the outer inner peripheral surface 22 b of the damper accommodating portion 22 for each damper portion 25.
In the above embodiment, in the rubber damper 14 in which the inner surface of each connecting portion 26 circumscribes the inner inner peripheral surface 22c of the damper housing portion 22, the inner surface 25c of each damper portion 25 is recessed from the inner inner peripheral surface 22c to the outer peripheral side. Thus, the space 27 was formed. As shown in FIG. 6, this makes each damper part 25 mutually independent without providing each connection part 26. As shown in FIG. And the annular space part 41 may be formed in the inner surface 25c side of each damper part 25. As shown in FIG. Also in this case, since the stress generated by the rotational driving force to be absorbed is suppressed and the characteristic deterioration of each damper portion 25 is hardly promoted, the life of the rubber damper 14 can be further extended.

In the above embodiment, the space portion 27 is provided only on the inner surface 25c side of each damper portion 25, but the space portion may be provided on the outer surface 25b side and the inner surface 25c side, respectively.
In the above embodiment, the rotational driving force transmission structure in the motor device 1 of the vehicle power window device is implemented, but the present invention may be applied to other motor devices such as a vehicle power door opening and closing device and a power roof opening and closing device.

Hereinafter, the technical idea grasped from each embodiment mentioned above is described with the effect.
(1) In the transmission structure of the rotational driving force, the rubber body is present at least in a region sandwiched between the input-side support surface and the output-side support surface in the circumferential direction with respect to the rotation axis. The space portion is provided at a position that deviates the region in the radial direction with respect to the rotation axis. According to such a configuration, since the stress generated in the rubber body by the rotational driving force is suppressed and the characteristic deterioration of the rubber body is hardly promoted, the life of the rubber body can be further extended.

  (2) In the transmission structure of the rotational driving force, the input side support surface and the output side support surface are formed so as to be substantially orthogonal to the circumferential direction with respect to the rotation axis. According to such a configuration, the volume of the space portion can be smaller, so that the size can be reduced.

The disassembled perspective view which shows the motor apparatus of this embodiment. (A) is a top view of a rubber damper, (b) is the sectional view on the AA line in (a). The top view which shows a rubber damper and a worm wheel. The top view which shows the rubber damper and worm wheel of an operation state. The top view of the rubber damper and worm wheel of other embodiments. The top view of the rubber damper and worm wheel of other embodiments. The exploded perspective view which shows the conventional motor apparatus. The top view which shows a rubber damper and a worm wheel. The top view which shows the rubber damper and worm wheel of an operation state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Motor apparatus, 10 ... Motor main body, 13 ... Worm wheel as an input side rotary body, 15 ... Output plate as an output side rotary body, 23a ... Side surface as an input side support surface, 25 ... Damper part as a rubber body , 27 ... space part, 29a ... side surface as an output side support surface, D ... area.

Claims (6)

The output side rotating body (15) is arranged on the same rotational axis with respect to the rotationally driven input side rotating body (13), and the input side rotating body (13) is provided with a plurality of input side support surfaces (23a). In addition, a plurality of output-side support surfaces (29a) are provided on the output-side rotator (15), and the inner side of the outer diameter R2 is centered on the outer inner peripheral surface (22b) of the input-side rotator (13) and the rotation axis. A rubber body (25) is accommodated between the outer peripheral surface (22c) and between the input side support surface (23a) and the output side support surface (29a), and the input side support surface (23a). And the output side support surface (29a), the rubber body (25) is supported in a circumferential direction with respect to the rotation axis, and the output side rotation body (13) rotates from the input side rotation body (13) through the rubber body (25). In the rotational driving force transmission structure for transmitting the rotational driving force to the body (15),
Adjacent rubber bodies (25) are connected to each other in a ring shape by a connecting portion (26), and the plurality of rubber bodies (25) are annular members (14) formed by the rubber body (25) and the connecting portion (26). Then, among the inner side surface (25c) of each rubber body (25) and the inner side surface of each connecting portion (26), only the inner side surface of each connecting portion (26) is the inner outer peripheral surface (22c) at the position of the outer diameter R2. ), And on the inner peripheral side of the rubber body (25) with respect to the rotational axis, the inner surface (25c) of the rubber body (25) is more rubber than the position of the outer diameter R2. A semicircular space (27) that allows elastic deformation of the rubber body (25) is provided between the outer peripheral surface (22c) and the outer peripheral surface (22c). In the annular member (14), the space (27) allows each rubber body (25) Transmission structure of the rotational driving force, characterized by being configured to side (25c) is not in contact with the inner peripheral surface (22c).   The rotational drive force transmission structure according to claim 1, wherein the rubber body (25) is formed so that an outer surface (25b) thereof is inscribed in the outer inner peripheral surface (22b). A motor body (10);
An input side rotating body (13) provided with a plurality of input side support surfaces (23a) and driven to rotate by the motor body (10);
An output-side rotating body (15) provided with a plurality of output-side support surfaces (29a) and disposed on the same rotational axis as the input-side rotating body (13);
Between the outer peripheral surface (22b) of the input side rotating body (13) and the inner peripheral surface (22c) of the outer diameter R2 with the rotation axis as the center, and the input side support surface (23a) and the A rubber body (25) received between the output side support surface (29a) and supported in the circumferential direction with respect to the rotation axis between the input side support surface (23a) and the output side support surface (29a); In a motor device comprising:
Adjacent rubber bodies (25) are connected to each other in a ring shape by a connecting portion (26), and the plurality of rubber bodies (25) are annular members (14) formed by the rubber body (25) and the connecting portion (26). Then, among the inner side surface (25c) of each rubber body (25) and the inner side surface of each connecting portion (26), only the inner side surface of each connecting portion (26) is the inner outer peripheral surface (22c) at the position of the outer diameter R2. ), And on the inner peripheral side of the rubber body (25) with respect to the rotational axis, the inner surface (25c) of the rubber body (25) is more rubber than the position of the outer diameter R2. A semicircular space (27) that allows elastic deformation of the rubber body (25) is provided between the outer peripheral surface (22c) and the outer peripheral surface (22c). In the annular member (14), the space (27) allows each rubber body (25) Side (25c) motor apparatus characterized by is configured so as not to contact the inner peripheral surface (22c).   The motor device according to claim 3, wherein the rubber body (25) is formed such that an outer surface (25b) thereof is inscribed in the outer inner peripheral surface (22b).   The rubber body (25) exists at least in a region (D) sandwiched between the input side support surface (23a) and the output side support surface (29a) in the circumferential direction with respect to the rotation axis. The motor device according to claim 3 or 4, wherein the space portion (27) is provided at a position that deviates the region (D) in a radial direction with respect to the rotation axis.   The input side support surface (23a) and the output side support surface (29a) are formed so as to be substantially perpendicular to the circumferential direction with respect to the rotation axis. The motor apparatus as described.

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