JP2011012688A - Rotation transmission mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation transmission mechanism in a simple structure, which is excellent in rotation transmission efficiency, rotational fluctuation responsiveness, and shock-absorbing properties between two rotating members.SOLUTION: In the rotation transmission mechanism with an inside rotating member 1 and an outside rotating member 2, an elastomer 3 is arranged in contact with an empty part on a rotational direction side surrounded by a meshing outward blade 11, an inward blade 21, an outer peripheral surface of the inside rotating member 1, the inner peripheral surface of the outside rotating member 2, and inner walls of both side plates 4. Using only elastic deformation of the elastomer 3 arranged in this way, the shock associated with a speed change between the two rotating members is absorbed, and an absorbed and stored energy is efficiently converted in a rotational motion energy. As a result, the rotation transmission efficiency transmitting an energy on a driving side to a driven side, the rotational fluctuation responsiveness associated with a change on the driving side, and the shock-absorbing properties are improved together. Moreover, since the both rotating members are mutually supported only by the elastomer 3, the structure is simple and maintenance is easy.

Description

The present invention relates to a rotation transmission mechanism, and more particularly to a rotation transmission mechanism that transmits power between two relatively low-speed rotation members disposed on a concentric shaft.

Patent Document 1 discloses a shock absorber for a bicycle using an elastic body. In Patent Document 1, the first member having a plurality of first protrusions facing the inner peripheral surface fixed to the first frame and the second frame rotatably attached to the first frame are fixed to the outer peripheral surface. And a second member having a plurality of second protrusions, wherein either the inner peripheral surface of the first member or the outer peripheral surface of the second member is between the first protrusion and the second protrusion. An elastic body such as urethane rubber, nitrile rubber, or polyethylene elastomer is disposed with a gap between them to buffer the load applied to the first frame and the second frame. This buffering action is caused by the elastic body compressively deforming during relative rotation of the first protrusion and the second protrusion, the impact between the protrusions is reduced, and the elasticity in the direction intersecting the compression direction is reduced. It is assumed that the amount of rotation of both members increases due to body expansion and further absorbs the impact, but none of them are directly connected to the drive source.

Japanese Patent Laid-Open No. 2004-260688 describes a motorcycle power that inserts an elastic body into a recess formed in a wheel of a motorcycle, connects a driven flange to the elastic body, and transmits power from the engine to the wheel via the driven flange and the elastic body. It is a transmission mechanism. This driven flange is divided into an engine side flange made of a highly rigid metal material such as iron and a wheel side flange made of a light weight material such as an aluminum alloy, and both the flanges are integrally coupled by a fastening member. The feature is that a partition wall is provided on the wheel to form a fan-shaped recess, and a driven flange is assembled, and a damper rubber and a bump rubber are arranged on both sides of the block of the partition wall and the wheel side flange. In addition, the rotation of the driven flange is transmitted to the wheel, and the reverse rotation of the wheel is buffered by the bump rubber to prevent the metal from contacting each other during forward and reverse rotation.

Patent Document 3 discloses a bicycle drive gear in which a power transmission unit is provided between a gear main body and a support, and a gap in which the gear main body and the support can rotate by a predetermined angle is provided in the power transmission unit. In addition, a rubber elastic body is disposed while holding this gap, and a mechanism that absorbs the impact from the power transmission unit and absorbs the impact at the time of initial depression is disclosed by absorbing the gap by elastic deformation of the elastic body. Yes.

Patent Document 4 discloses a mechanism for connecting a drive source mounting flange of a transmission and a propeller shaft via a rubber body. However, in the present invention, the rubber body is fixed by a thrust bolt on the flange side and by a radial bolt on the propeller shaft side. Therefore, the rubber body is between the two fixing means and only controls the rotation transmission of the flange and the propeller shaft, and is completely involved in the mutual support of the flange as the driving side rotating member and the propeller shaft as the secondary side rotating member. Not.

The invention of Patent Document 5 is a resilient coupling that buffers a reverse torque from a wheel between a drive wheel and a driven pulley, thereby extending the life of the belt in a belt-type continuously variable transmission. In this elastic coupling, unidirectional power transmission from the drive reduction gear to the driven reduction gear between the external gear coupling element connected to the drive reduction gear and the internal gear coupling element connected to the driven reduction gear, That is, it specializes in buffering reverse torque. As this elastic member, a spring or a synthetic rubber material is disclosed.

In Patent Document 6, one cushioning material is provided between one abutting portion of the driving portion and the one abutting portion of the driven portion in the rotational direction of the driving portion and the driven portion arranged concentrically. It is loosely fitted. The power of the drive part is transmitted to the contact part of the driven part that can contact the one end surface of the cushioning material by rotating the contact part of the drive unit by a certain angle and contact the other end surface.

JP 11-278350 A JP 2001-241507 A Japanese Patent Laid-Open No. 64-63489 JP 2000-266076 A JP 2000-291773 A JP-A-11-346456

The invention described in Patent Document 1 is basically a simple shock absorbing mechanism between members provided on two fixed frames that are rotatably connected, and is not a transmission mechanism connected to a drive source. For this reason, the rubber-like elastic body is disposed with a gap on either the inner peripheral surface of the first member or the outer peripheral surface of the second member, and intersects with the compression elasticity of the elastic body itself and the compression of the elastic body. The impact at the time of relative rotation of the frame is merely buffered by utilizing the expansion of the elastic body in the direction of the air gap. In the structure where an elastic body is arranged with a gap on either the inner peripheral surface of the first member or the outer peripheral surface of the second member, if power is to be transmitted from one to the other, the gap portion is A time lag occurs only for the time required for the expansion of the elastic body, and the transmission response is poor.

The invention described in Patent Document 2 is to transmit the rapid rotation fluctuation of the engine or wheels in the motorcycle while buffering with the elastic body, but by arranging the elastic body divided into two of the damper rubber and the bump rubber, The main purpose is to avoid direct contact between the metals constituting the wheel partition wall and the wheel side block. For this reason, the whole structure is too complicated and is not practical as a multipurpose rotation transmission mechanism unit.

In the invention described in Patent Document 3, a gap that enables relative rotation between the gear body and the support body is provided in the power transmission section provided between the gear body and the support body, and this gap is provided in a portion different from the power transmission section. The elastic body is disposed and the power is transmitted by absorbing the gap due to the elastic deformation of the elastic body. In Patent Document 1, the gap is in the direction intersecting the rotation direction, whereas in Patent Document 3, The difference is that the gap is in the direction of rotation. However, as in Patent Document 1, there is no change in that a time lag occurs when the rotation is transmitted only for the time required to absorb the gap. Therefore, it lacks responsiveness especially at the first action.

In the invention described in Patent Document 4, the rubber body is only involved in torque transmission, and is not involved in the mutual support of the propeller shaft and the flange. In addition, the structure is complicated, and there is no acceleration action due to expansion in a direction crossing the rotation direction due to displacement at the time of initial acceleration.

In the elastic coupling of Patent Document 5, a spring or a synthetic rubber material is disposed as an elastic body interposed between both gears of the inner and outer rotating members. However, from the viewpoint of mutual support of the inner and outer rotating members, the spring does not expand in a direction crossing the rotation direction, and the intended purpose cannot be achieved. In addition, the elastic body is unevenly distributed as viewed from the midpoint of the inner and outer rotating shafts, and is not suitable for transmitting bidirectional driving power.

As in Patent Document 6, an abutting portion of a driving portion capable of abutting on one end surface of one notch-shaped donut-shaped cushion material loosely fitted between a driving portion and a driven portion is disposed, and the other The structure in which the abutment part of the driven part that can abut on the end face is not well balanced and inferior to the transmission efficiency of the initial power, and the abutment part between the drive part and the driven part already abuts against the cushioning material. Therefore, special motor control is required due to lack of buffer response to the shifting speed during rotation.

In any case, most of the conventional transmission mechanisms via elastic bodies mainly aim at the shock buffering effect focusing on the impact absorbing function of the elastic bodies, and the responsiveness in the rotational transmission inherent in the rotary transmission mechanism. Was sacrificed.

An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide a rotation transmission mechanism that is excellent in rotation transmission, rotation transmission response, and shock buffering between two rotation members.

Another object of the present invention is to provide a rotary transmission mechanism that is simple in structure, has a small number of parts, and is easy to operate and maintain.

The rotation transmission mechanism of the present invention that has achieved the above object has the following features and preferred aspects.
Item 1: An inner rotation member having a plurality of outward blades and a concentric outer rotation member having a plurality of inward blades meshing with the outward blades, and either the inner rotation member or the outer rotation member is on the drive side The other side is a rotational transmission mechanism that is the driven side, and includes side plates that are independent of the inner rotating member on both sides of the outer rotating member, the outward blade is not in contact with the inner peripheral surface of the outer rotating member, and the inward blade is the inner rotating member. The inner surface of the rotating member is not in contact with the outer peripheral surface of each of the rotating members, and between each of the blades and between both side plates, each of the hollow portions on the rotational direction side is substantially formed on the inner wall of the four enclosures forming the empty portion. The rotation is characterized in that it is distributed in contact with the outer rotation member, supports the outer rotation member on the outer periphery of the inner rotation member only through the elastomer, and transmits the rotation of the driving side rotation member to the driven side rotation member. Transmission mechanism.
Item 2: The rotational transmission mechanism according to Item 1, comprising side plates having openings concentric with the inner rotating member on both sides of the outer rotating member.
Item 3: The rotational transmission mechanism according to Item 1 or 2, wherein the both ends of the inner rotation member in the axial direction have a thickened portion having a smaller diameter than the openings of the side plates.
Item 4: The outer blades of the inner rotating member, the inner blades of the outer rotating member, and the elastomer are radially arranged so as to pass through the midpoint of the inner rotating member at the virtual extension line. The rotation transmission mechanism according to claim 1.
Item 5: The rotation transmission mechanism according to any one of Items 1 to 4, wherein the elastomer is arranged with an auxiliary elastomer that is softer in the rotation direction.
Item 6: Any one of Items 1 to 5, wherein the inner rotating member is a driving body and the outer rotating member is a follower, and the elastomer is configured to be heavier from the outer peripheral surface of the inner rotating member toward the inner peripheral surface of the outer rotating member. The rotation transmission mechanism according to any one of claims 1 to 3.
Item 7: A transmission using the rotation transmission mechanism according to any one of Items 1 to 6.

In the present invention, an elastomer means a material having rubber-like elasticity, and does not imply a mechanical elastic body such as a streak.

In the rotation transmission mechanism of the present invention, by placing the elastomer in contact with the inner walls of the outer space formed by the outer peripheral surface and the outward blades of the inner rotary member and the inner peripheral surface and the inward blades of the outer rotary member, There are effects and benefits.
(1) Since the inner and outer rotating members are supported and transmitted only by the elastomer, no special support such as a bearing or a transmission reducing member is required. Therefore, it is very simple in structure and not only is easy to operate and maintain, but there is no friction loss of bearings and the like, and the rotational transmission efficiency is high. Preferably, by arranging the outward blades of the inner rotating member, the inward blades of the outer rotating member, and the elastomer radially so as to pass through the midpoint of the inner rotating member at the virtual extension line, stable and smooth rotation is achieved. can get.
(2) The result is that the initial motion or acceleration energy accumulated by the elastic displacement of the elastomer in the rotational direction on the drive side becomes the repulsive energy of the elastomer due to the expansion in the direction intersecting the rotational direction, and the resultant force is converted to the output energy on the driven side. The input energy is accelerated and a strong output is temporarily generated. As a result, despite the time lag due to the variation of the elastomer, there is no delay in the speed to reach the target steady rotational energy, and the energy transmission efficiency and the transmission response are good.
(3) When there is no change in input energy, the inner and outer rotating members are integrated via the elastomer, so that the rotation on the driving side is transmitted to the driven side as it is. In addition, when the driving side is the inner rotating member and the driven side is the outer rotating member, the rotational force is increased by the centrifugal force generated from the rotational inertia.
(4) The impact at the time of initial movement or acceleration is absorbed only by the elastic displacement of the densely packed elastomer and is smoothly buffered.
(5) A plurality of outward blades of the inner rotating member, a plurality of inward blades of the outer rotating member, and an elastomer distributed between each of the plurality of outward blades and each of the plurality of inward blades. When the same energy is input as compared to a single elastomer arranged in this way, the time lag associated with compression is more right when the elastomer is arranged between each of the plurality of outward blades 11 and the plurality of inward blades. The time lag is divided by the number of blades. In the case of the same time lag, the compressed elastomer can obtain a repulsive force multiplied by the number of right plural blades.

The typical Example of the rotational transmission mechanism of this invention is shown, (A) is sectional drawing, (B) is a side view. 1. It is an AA expanded sectional view of the rotation transmission mechanism of FIG. 1, (A) shows the basic composition of elastomer arrangement | positioning, (B) and (C) each show a different structure typically. The example which provided the thick part in the both sides of the inner side rotation member of the rotation transmission mechanism of this invention is shown, (A) is sectional drawing, (B) is a side view. 3 shows an example in which the inner rotating member of the rotation transmission mechanism of FIG. 3 is set on the driving side and the outer rotating member is set on the driven side, (A) is a cross-sectional view, and (B) is a plan view. It is a speed graph which shows the acceleration effect | action of the elastomer in the rotational transmission mechanism of this invention. It is an energy graph which shows the energy efficiency of the elastomer in the rotational transmission mechanism of this invention. FIG. 4 is a schematic diagram showing an impact buffering action of the inner rotating member in the rotation transmission mechanism of the present invention, in which (A) is an impact vector applied to the side plate, and (B) is an impact vector applied to the bulge portion of the inner rotating member. It is a schematic diagram which shows the example which used the rotational transmission mechanism of this invention for the compressor fan of the air conditioner. It is a schematic diagram which shows the example which used the rotational transmission mechanism of this invention for the motor shaft.

Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show a typical example of the present invention. 1 and 2, the inner rotating member 1 and the outer rotating member 2 include a plurality of outward blades 11 and inward blades 21 that mesh with each other, and are fitted so as to be relatively rotatable. The number of blades can be appropriately selected according to the application, but usually about 3 to 6 blades are practical. As shown in FIG. 2, the outward blades 11 of the inner rotating member 1 may be integrated or fixed, do not contact the inner peripheral surface of the outer rotating member 2, and the inward blades 21 of the outer rotating member 2 are also integrated or fixed. However, the outer peripheral surface of the inner rotation member 1 is not in contact with each other, and is alternately meshed. As shown in FIG. 2 (a), the outer peripheral surface of the inner rotary member 1, one side of the plurality of outward blades 11, and the inner peripheral surface of the outer rotary member 2 that opposes the outer peripheral surface of the inner rotary member 1, A hollow portion (hereinafter referred to as “empty portion”) that is surrounded by one side of the inward blade 21 that opposes one surface of the plurality of outward blades 11 of the inner rotary member 1 and the side plates 4 provided on both sides of the outer rotary member 2. The elastomers 3 are dispersedly arranged. The elastomer 3 is disposed in contact with any of the inner wall surfaces constituting the empty portion without any gap, and the elastic displacement is regulated by the side plate 4. In the present invention, the elastomer 3 has two functions of integrally supporting the inner and outer rotating members by absorbing the impact at the time of initial movement and shifting and by expanding in the direction of rotation with rotation. In the present invention, such an elastomer 3 is placed between the plurality of outward blades 11 of the inner rotating member 1, the plurality of inward blades 21 of the outer rotating member 2, and the plurality of outward blades 11 and the plurality of inward blades 21. When the same energy is input as compared with the single elastomer 3 arranged as in Patent Document 6, the elastomer 3 is placed between each of the plurality of outward blades 11 and the plurality of inward blades 21. In the case of arrangement, the time lag associated with compression is reduced to a time lag divided by the number of blades. And when it is the same time lag, the compressed elastomer 3 can obtain the repulsive force multiplied by the number of several blades. Further, in the present invention, the outward blades 11 of the inner rotating member 1, the inward blades 21 of the outer rotating member 2, and the elastomer 3 are preferably radially arranged so that their virtual extension lines pass through the midpoint of the inner rotating member 1. Has been placed. As a result, there is no uneven distribution in any direction of rotation, and unlike the elastic body of Patent Document 5, there is no vibration shake or play, and a very stable and smooth rotation can be obtained as a transmission mechanism. In addition, by changing the weight of the side plate 4, a desired rotational inertia or centrifugal force can be obtained according to the purpose of use. In any case, by this contact arrangement without a gap, the elastomer 3 acts as a relative rotation transmission medium between the outward blade 11 of the inner rotating member 1 and the inward blade 21 of the outer rotating member 2, and the rotation transmission efficiency, Rotational transmission response and shock buffering are shown. At the same time, the elastomer 3 stably supports the outer rotating member 2 on the outer peripheral surface of the inner rotating member 1. In other words, in the present invention, the outer rotating member 2 is supported on the outer periphery of the inner rotating member 1 only by the elastomer 3, and does not have a special support structure such as a bearing bearing such as a conventional rotation transmission mechanism. Is one of the features. Therefore, the structure is extremely simple, the number of parts is small, the weight is light, and the mechanical frictional rotation loss like a bearing is also small. a is a through-hole for inserting a rotating shaft into the inner rotating member 1. In the present invention, either the inner rotating member 1 or the outer rotating member 2 is set on the drive side, and the other is used according to the application. Can be set arbitrarily on the driven side. b is an opening of the outer plate 4.

In the present invention, the empty portion different from the rotation direction side means, for example, in the rotation transmission mechanism of FIG. 2 (a), when the inner rotation member 1 is connected to the drive source, the rotation is clockwise and the elastomer 3 Is interposed between the outward blade 11 and the inward blade 21 in the clockwise direction, but is not interposed between the outward blade 11 and the inward blade 21 in the counterclockwise direction, and the outward blade 11 in the counterclockwise direction. And the inward blade 21 are in contact with each other. Conversely, when the outer rotating member 2 is connected to the drive source, the outer rotating member 2 rotates counterclockwise, and the elastomer 3 is interposed between the inward blade 21 and the outward blade 11 in the counterclockwise direction, and rotates clockwise. The inward blade 21 and the outward blade 11 are integrally in contact with each other in the clockwise direction. Further, when the drive source is connected to the inner rotating member 1, an auxiliary elastomer 3 a softer than the elastomer 3 can be disposed between the outward blade 11 and the elastomer 3 as shown in FIG. . Conversely, when the drive source is connected to the outer rotating member 2, an auxiliary elastomer 3 b that is softer than the elastomer 3 can be disposed between the inward blade 21 and the elastomer 3 as shown in FIG. . The auxiliary elastomers shown in FIGS. 2 (b) and 2 (c) are materials mainly intended for shock buffering at the time of initial movement or shifting. In FIGS. 2 (b) and (c), one type of auxiliary elastomer 3a, 3b is arranged in the rotational direction, but the entire elastomer is arranged in order from a relatively soft auxiliary material to a harder material that also serves as support. The layer may be composed of an elastomer. In any case, according to the present invention, the impact at the time of initial movement or speed change is absorbed by the auxiliary elastomer (3a) (3b) by arranging the relatively soft elastomer to the hard elastomer in order from the driving blade. From the time when the absorption limit is exceeded, the original elastomer 3 transmits the rotational direction power to the opposite outward blade 11 and the inward blade 21 and also expands in the direction crossing the rotational direction, thereby causing the inner and outer rotating members 1 to rotate. 2 are integrally supported to further accelerate the rotation.

The elastomer 3 used in the present invention can be appropriately selected from natural rubber, synthetic rubber, and other materials having rubber-like elasticity at room temperature, but synthetic rubber is desirable from the type and function thereof. Examples of the synthetic rubber include the presence or absence of a double bond, and examples of the diene rubber include isoprene rubber, butadiene rubber, styrene-butadiene rubber, chloroprene rubber, and acrylonitrile butadiene rubber. Examples of the non-butadiene rubber include butyl rubber, ethylene / propylene rubber, urethane rubber, silicon rubber, chlorosulfone rubber, chlorinated polyethylene, acrylic rubber, epichlorohydrin rubber, and fluorine rubber. In the present invention, from the viewpoint of rotational transmission efficiency, rotational transmission responsiveness, impact buffering properties, and support stability, the selection of the elastomer 3 can be selected according to the application, but in general, the use of butadiene rubber is used. It is practical.

FIG. 3 shows an example in which a bulge portion c is provided at both ends of the center of the inner rotating member 1. The thickened portion c is smaller in diameter than the opening b of the side plate 4 of the outer rotating member 2 and is thicker than the opening end surface of the side plate 4, and an abnormal impact is applied to the outer rotating member 2. When it is added, it contacts and supports the side plate 4 to alleviate the impact force and prevent the side plate 4 from directly contacting the drive shaft 5 as shown in FIG. As a result, the entire rotation transmission mechanism is less likely to be fatally damaged.

FIG. 4 shows an example of a transmission device in which the inner rotating member 1 is set on the drive side and the outer rotating member 2 is set on the driven side, for example, rotation transmission of a bicycle pedal and a wheel. is there. As shown in FIG. 4A, the drive-side inner rotating member 1 has a drive shaft 5 inserted into the through hole a. The drive shaft 5 is connected to a drive source (not shown) such as a rotating motor. On the other hand, as shown in FIG. 4B, the driven-side outer rotary member 2 includes a sprocket 6 on the outer periphery thereof. The sprocket 6 is connected to another rotating body (not shown) that operates, for example, via a chain. In this application example, in order to effectively use the inertia of the rotational centrifugal force, it is desirable that the elastomer 3 is configured to be heavier continuously or stepwise from the outer peripheral surface of the inner rotating member 1 to the outer peripheral surface of the outer rotating member 2. . Further, if necessary, a weight (not shown) is arranged between the end face of the outward blade 11 of the inner rotating member 1 and the inner peripheral surface of the outer rotating member 2, so that the centrifugal force due to the rotation inertia is more positive. It can also be used.

FIG. 5 shows the acceleration action of the elastomer 3 in the rotational transmission mechanism of the present invention. In the present invention, as shown in FIG. 5, in the example using the elastomer 3, the delay at the initial movement is accumulated in the elastomer 3 as energy due to the elastic compression of the elastomer 3 as compared with the example without the elastomer 3. It is estimated that the energy is repelled by expansion in the direction intersecting the direction and is output at an accelerated rate.

FIG. 6 shows the energy efficiency of the elastomer 3 in the rotational transmission mechanism of the present invention. The acceleration action of FIG. 5 is supported by the energy transition of FIG. That is, also in FIG. 6, the example using the elastomer 3 shows a higher energy peak corresponding to the rise delay at the time of the initial movement than the example using the elastomer 3. In the present invention, since this repulsive energy can be applied to a large load required at the time of the initial motion of the rotating body, the energy efficiency is remarkably improved. Furthermore, if the auxiliary elastomer is disposed as shown in FIGS. 2 (B) and 2 (C), the impact absorption at the initial movement is remarkably improved.

FIG. 7 shows the operation of the thick portion c of the inner rotating member 1. In the present invention, the abnormal impact and load applied to the outer rotating member 2 are the diagonal lines of the downward moment toward the center of both rotating members and the horizontal moment accompanying the movement of the rotating body, as shown in FIG. The resultant resultant moment is As shown in FIG. 7, when the thickened portion c is provided in the inner rotating member 1, as shown in FIG. 7B, due to the contact interference action between the inner peripheral end surfaces of both side plates and the outer periphery of the thickened portion c. The resultant moment is reduced in proportion to the diameter of the ridge portion c, and the impact force received is consequently reduced.

FIG. 8 shows a usage example different from FIG. In FIG. 8, the rotation transmission mechanism of this invention is used for the compressor fan of an air conditioner. The rotation transmission mechanism is integrated with the drive shaft 5 of the drive motor and applies rotational power to the compressor fan of the air conditioner via a belt. In FIG. 9, a gear is provided on the outer periphery of the rotational transmission mechanism of the present invention, which is also integrated with the drive shaft 5 of the drive motor, instead of the sprocket 6 in FIG. Rotational power is transmitted by meshing with the gears. The rotation transmission mechanism of the present invention can be used for various purposes other than these examples, but can be suitably used for transmission to a relatively low-speed rotating body.

The rotation transmission mechanism of the present invention as described above operates as follows, for example, according to the example of FIG. First, before driving input, the outer rotating member 2 is stably supported on the outer periphery of the inner rotating member 1 only by the elastomer 3. The rotation from the driving source is given to the inner rotating member 1 by the driving shaft 5. The inner rotating member 1 receives this rotation and transmits it to the inward blade 21 of the outer rotating member 2 through the elastomer 3 by the outward blade 11. At this time, in the present invention, since the elastomer 3 is arranged in close contact with the inner wall constituting the empty portion, the elastomer 3 is compressed only within the range of the elastic variation of the elastomer 3 to be used, and the displacement at the initial motion and acceleration is reduced. As shown in FIG. 5 and FIG. 6, not only can the transmission be performed efficiently, but also excellent performance is exhibited in the responsiveness to reach the steady rotational speed. Further, the impact received at this time is absorbed and buffered by the elastic displacement of the elastomer 3. At this time, as shown in FIGS. 2B and 2C, if the auxiliary elastomer 3a or 3b softer than the elastomer 3 is disposed between the driving blade and the elastomer 3, the impact absorbing effect is further enhanced. In addition, the abnormal load applied to the outer rotating member 2 is received by the thick portion c of the inner rotating member 1, thereby avoiding contact with the drive shaft 5. This also prevents the rotation transmission mechanism from undergoing fatal damage.

  The rotation transmission mechanism of the present invention can be widely applied to bicycle transmissions that rotate relatively on the body side, and other various transmissions that accompany speed increase / decrease. For example, it can be used for bicycles, wheelchairs, children's tricycles, rear cars, unicycles, wind power generators and electric fan propellers, and tillers.

DESCRIPTION OF SYMBOLS 1 ... Inner rotating member 11 ... Outward blade | wing 2 ... Outer rotating member 21 ... Inward blade | wing 3 ... Elastomer 3a, 3b ... Auxiliary elastomer 4 ... Side plate 5 ... Drive shaft 6 ... Sprocket a ... Through-hole b ... Opening part c ... Thick part

Claims (7)

  An inner rotating member having a plurality of outward blades and a concentric outer rotating member having a plurality of inward blades meshing with the outward blades, one of the inner rotating member and the outer rotating member being driven and the other being driven A rotation transmission mechanism that is a side, provided with side plates that are independent of the inner rotating member on both sides of the outer rotating member, the outward blade is not in contact with the inner peripheral surface of the outer rotating member, and the inward blade is the outer peripheral surface of the inner rotating member The elastomer is substantially in contact with the inner wall of the four surroundings that constitutes the vacant space, in each of the hollow portions on the rotation direction side constituted by the inner and outer peripheral surfaces of both rotating members, between both blades and between both side plates. A rotation transmission mechanism that is arranged in a distributed manner, supports the outer rotation member on the outer periphery of the inner rotation member only through the elastomer, and transmits the rotation of the driving side rotation member to the driven side rotation member.   The rotation transmission mechanism according to claim 1, further comprising side plates having openings concentric with the inner rotation member on both sides of the outer rotation member.   The rotation transmission mechanism according to claim 1 or 2, wherein the inner rotation member has a thickened portion having a smaller diameter than the openings of both side plates on both end surfaces in the axial direction.   The outward blades of the inner rotating member, the inward blades of the outer rotating member, and the elastomer are radially arranged so as to pass through the midpoint of the inner rotating member at a virtual extension line thereof. The rotation transmission mechanism described in 1.   The rotation transmission mechanism according to any one of claims 1 to 4, wherein the elastomer is provided with an auxiliary lastomer that is softer toward the front in the rotation direction.   The inner rotating member is a driving body, the outer rotating member is a follower, and the elastomer is configured to be heavier from the outer peripheral surface of the inner rotating member toward the inner peripheral surface of the outer rotating member. The described rotary transmission mechanism.   A transmission using the rotation transmission mechanism according to any one of claims 1 to 6.

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