JP2000055072A - Coupling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling which satisfies both damping and vibration- absorbing ability and torque transmitting ability when the torsional displacement thereof is small, and which is excellent in durability. SOLUTION: Drive connectors 1 and driven connectors 2 are alternately arranged at circumferential direction intervals of 60 deg., and are circumferentially coupled with one another by a first and second coupling bands 51, 52 which are wound on drive and driven bobbin winding rings 3, 4. The first and second coupling bands 51, 52 are made of a wire 5 which increases its diameter from one to the other longitudinal end, having a required tensile elasticity, and which is wound in multiple layers in such a way that a part 5a on the smaller diameter side is set on the loop inner peripheral side while a part 5b on the larger diameter side is set on the loop outer peripheral side. At the initial stage of torsional displacement, a tensile force is exerted to the small diameter part 5a on the loop inner peripheral side in the coupling band 51 or 52, the torsional spring constant is low, and as the degree of the torsional displacement become larger, the tensile force is exerted also to the larger diameter part 5b of the wire on the outer peripheral side, thereby it is possible to surely transmit a torque.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling for connecting a drive-side rotary shaft and a driven-side rotary shaft and for absorbing transmission vibration between the two shafts, and in particular, for connecting to a drive-side rotary shaft. The present invention relates to a connector in which a connector between a drive and a driven-side rotary shaft is connected via a loop-shaped connection band.

A typical conventional example of this type of coupling is disclosed, for example, in Japanese Utility Model Laid-Open No. 3-73724. That is, as shown in FIG.
And driven-side connectors b are alternately arranged at equal intervals in the circumferential direction, and loops are wound around the winding rings c and d in which the driving-side connectors a and the driven-side connectors b adjacent to each other in the circumferential direction are mounted on the outer periphery thereof. Are connected by connecting bands e and f made of polyester yarn having an appropriate tensile elasticity and wound around, and the thread winding rings c and d and the connecting bands e and f are embedded in an annular elastomer member g of rubber, synthetic resin or the like. It was done.

As shown in FIG. 9, the thread winding rings c and d are respectively composed of sleeves c1 and d1 and a pair of collars c2 and d2 having a substantially U-shaped cross section fixed to both ends in the axial direction. The connecting band e is wound around the collars c2 and c2 of the bobbin ring c mounted on the drive side connector a and the collars d2 and d2 of the bobbin ring d mounted on the driven side connector b, respectively. The connection band f adjacent in the circumferential direction is a drive-side connector a.
Between a portion between the collars c2 and c2 on the outer peripheral surface of the sleeve c1 of the bobbin ring c mounted on the outer peripheral surface and the collars d2 and d2 on the outer peripheral surface of the sleeve d1 of the bobbin ring d mounted on the driven side connector b. Wrapped around the part. That is, each drive-side connector a and each driven-side connector b alternately arranged at equal intervals in the circumferential direction are composed of two bundles of connecting bands e and e.
And a bundle of connecting bands f, which are connected alternately in the circumferential direction.

In the coupling having this structure, the drive-side connector a is attached to the drive-side rotary shaft by bolts (not shown) arranged at equal circumferential intervals on a yoke at the shaft end of the drive-side rotary shaft. The driven side connector b is attached to a bolt (not shown) arranged at equal circumferential intervals on the yoke at the shaft end of the driven side rotating shaft, whereby the rotation of the driving side rotating shaft is transmitted to the driven side rotating shaft. In addition to the transmission, the rotation transmission in a connection state (twisted state) in which the directions of the axes of the drive side rotation shaft and the driven side rotation shaft are different due to the deformation characteristics of the connection bands e and f and the elastomer member g is allowed, and It absorbs transmitted vibration between both shafts.

[0005]

This type of coupling has the performance of effectively reducing the impact by lowering the spring constant in the torsional direction with respect to the initial input of torque, and transmitting torque securely. It is desirable to have. However, according to the conventional coupling described above, since the spring characteristics and the torque transmission force in the torsional direction depend on the tensile elasticity of the connection bands e and f, only certain characteristics can be obtained. When the torsional spring constant due to the tensile elasticity of the connecting bands e and f is set low in order to improve the buffering property against
It is pointed out that the torque transmission force also decreases.

The connecting bands e and f extend in parallel with each other on the inner peripheral side and the outer peripheral side of the elastomer member g between the bobbin rings c and d, and the driving side connector a and the driven side adjoining each other in the circumferential direction. When the distance between the connectors b changes due to the torsional input, the amount of tensile deformation received by the connecting bands e and f accordingly
Portions e1 and f extending on the inner peripheral side of the elastomer member g
The portions e2 and f2 extending on the outer peripheral side are relatively larger than those of FIG. Therefore, the portion e extending on the outer peripheral side
In 2 and f2, the fibers in the connecting bands e and f are worn out, or in the portion wound around each of the wound rings c and d, the outer-peripheral fiber bites between the inner-peripheral fibers, resulting in a decrease in durability. Characteristics may change.

SUMMARY OF THE INVENTION The present invention has been made under the above circumstances, and its main technical problems are to improve both the cushioning and the vibration absorption at the initial input of torque and the torque transmitting force. It is to provide a coupling that is satisfactory and has excellent durability.

[0008]

Means for Solving the Problems The technical problems described above are:
This can be effectively solved by the present invention. That is, as a first solution, the coupling according to the present invention is:
A plurality of and the same number of drive-side threaded rings and driven-side threaded rings, which are alternately arranged at predetermined intervals in the circumferential direction, and a loop astride the circumferentially adjacent drive-side and driven-side threaded rings. A first connecting band having an appropriate tensile elasticity wound around the first connecting band, and a driving-side bobbin ring and a driven-side bobbin ring adjacent in the circumferential direction between the first connecting bands adjacent in the circumferential direction. A second connecting band that has a suitable tensile elasticity and is wound in a loop shape while straddling,
A driven side bobbin ring and an elastomer member formed in a state in which the first and second connection bands are buried and continuous in a circumferential direction, and each of the first and second connection bands is directed from one end to the other end. The wire having a large diameter is wound in a multilayer shape, and the wire diameter of the wire is relatively large on the outer layer side of the loop.

As described above, in this type of coupling, the tension of the connecting band when the distance between the circumferentially adjacent driving side and the driven side bobbin ring is changed by the torsional input. The amount of deformation is greater at a portion extending on the outer peripheral side than at a portion extending relatively on the inner peripheral side inside the elastomer member. According to the configuration of the present invention, the wire constituting the connection band wound in a loop over the drive-side wound ring and the driven-side wound ring that are circumferentially adjacent to each other is formed by the outer layer of the wound ring. Since the wire is wound so that the wire diameter increases on the side, in the portion extending on the outer peripheral side,
The wire diameter of the wire is larger on the outer peripheral side where the amount of tension is larger, so that the wire is less likely to be cut.

Further, when a relative displacement is generated between the driving-side and the driven-side bobbin rings adjacent to each other in the peripheral direction due to the torsion input, the tensile force at the initial stage of the displacement firstly increases the diameter of the wire from the bobbin ring to the inner peripheral layer side. Since it is received with a small wire, the spring constant in the torsional direction is kept low, and therefore, torsional vibration and the like can be effectively absorbed. Further, as the relative displacement between the drive-side thread winding ring and the driven-side thread winding ring due to the torsional input increases, the tensile force due to this displacement is transmitted to the portion of the outer layer having a large wire diameter, so that the torsional spring constant is reduced. As a result, the torque transmitting force from the driving side to the driven side increases.

[0011] As a second means for solving the problem, the coupling according to the present invention is such that each of the first and second connecting bands is partially slackened between the thread wound rings.

In the above configuration, in the portion where the drive-side and the driven-side bobbin rings are displaced by the torsional input in a direction in which they are relatively separated from each other, until the slack of the connecting band is eliminated and the tension is applied. The spring constant in the torsional direction is kept low, so that torsional vibration and the like can be effectively absorbed. In addition, when the relative displacement between the drive-side and the driven-side bobbin rings due to the torsion input increases to a predetermined value or more, and the slack of the connecting band is eliminated, the spring constant is increased by the tensile elasticity of the connecting band. As a result, excessive torsional displacement between the driving side and the driven side is suppressed, so that reliable torque transmission is performed.

[0013]

FIG. 1 shows a first preferred embodiment of a coupling according to the present invention, in which (A) is a half-sectional view cut on a plane perpendicular to the axis, and (B) is ( It is sectional drawing cut | disconnected by the BB line in A). In the following description, the “circumferential direction” refers to a circumferential direction around the axis (coupling axis).

In the coupling shown in FIG. 1, three reference numerals 1 are arranged at intervals of 120 ° in the circumferential direction (FIG. 1).
(Only one is shown in (A).) A cylindrical drive-side connector with a drive-side thread winding ring 3 mounted on each outer periphery. Reference numeral 2 denotes each intermediate position between the drive-side connectors 1 and 1, that is, the drive. 120 ° in the circumferential direction with a phase different from the side connector 1 by 60 °
Cylindrical driven-side connectors with three driven-side thread winding rings 4 arranged at respective intervals (only two are shown in FIG. 1B) at intervals, and reference numerals 51 and 52 are circumferentially alternated The first and second connecting strips are connected to each other to connect the driving-side spool 3 (the driving-side connector 1) and the driven-side spool 4 (the driven-side connector 2) adjacent to each other in the circumferential direction. Reference numeral 6 denotes each of the spools 3 and 4 and each connecting band 5.
It is an annular elastomer member that is vulcanized and molded in a state in which the rubber members 1 and 52 are embedded, and is continuous in the circumferential direction.

The drive-side connector 1 and the driven-side connector 2 are arranged such that their axes are parallel to the axis of the coupling. As shown in FIG. 1B, the drive-side bobbin ring 3 has a sleeve 31 to which the drive-side connector 1 is press-fitted.
And a pair of collars 32 having a substantially U-shaped cross section fixed to both ends in the axial direction. The same applies to the driven-side bobbin ring 4, which comprises a sleeve 41 to which the driven-side connector 2 is press-fitted and a pair of collars 42 having a substantially U-shaped cross section fixed to both ends in the axial direction.

The first connecting strips 51 are arranged in three circumferentially equidistant shapes, and a pair of collars 32 of the driving-side spool 3 and a corresponding pair of collars of the driven-side spool 4 corresponding to the pair. It is wrapped in a loop over the space between 42 and 42. In addition, the second connecting band 52 is provided with each first connecting band 5.
1 and 51, each of the collars 4 of the driven side bobbin ring 4
2 and the respective collars 32 of the driving-side thread winding ring 3 corresponding thereto.
It is wrapped around in a loop. That is, each drive-side connector 1 and each driven-side connector 2 are alternately arranged at intervals of 60 ° in the circumferential direction, and the two bundles of the two bundles wound around the drive-side and driven-side bobbin rings 3 and 4 are arranged. With one connecting band 51, 51 and one bundle of second connecting band 52,
They are alternately connected in the circumferential direction.

The first and second connecting bands 51 and 52 are made of a wire 5 made of a material having a required tensile elasticity such as polyester, for example, formed so that the wire diameter increases from one end in the longitudinal direction to the other end. As shown in FIG. 1B, the portion 5a having a small wire diameter is located on the inner peripheral layer side of the loop, and the portion 5a having a large wire diameter.
It is wound in a multilayer shape such that b is on the outer layer side of the loop. The wire 5 may have a continuously changing wire diameter as shown in FIG. 2A, or may have a gradually changing wire diameter as shown in FIG. 2B. Both ends thereof are connected to the drive side and / or driven side thread winding rings 3 and 4 or fixed by an adhesive or the like.

A window 6a is formed in the elastomer member 6 at a position midway between each of the drive side thread winding rings 3 and each of the driven side thread winding rings 4. The window portion 6a is used to fill the elastomer molding material into a mold cavity in which the driving side spool 3, the driven side spool 4, the first connecting band 51 and the second 52 are assembled in advance in the manufacture of the coupling. In order to prevent the unstable behavior of the wire 5 of the first and second connecting bands 51 and 52 due to the injection pressure, an intermediate convex portion provided in the mold cavity (see FIG. (Indicated by reference numeral 7a).

The coupling according to the above-described embodiment is, similarly to the coupling according to the prior art, circumferentially attached to the yoke at the shaft end of the drive-side rotary shaft by bolts (not shown) through which the respective drive-side connectors 1 are inserted. Each of the driven-side connectors 2 is attached at intervals of 120 °, and each of the driven-side connectors 2 is inserted into the yoke at the shaft end of the driven-side rotary shaft facing the shaft end of the driven-side rotary shaft by a bolt (not shown). 12
Mounted at 0 ° intervals. Thus, the rotation of the drive-side rotating shaft is transmitted to the driven-side rotating shaft via the first and second connecting bands 51 and 52, and the first and second connecting bands 5
A structure in which the rotation of the drive-side rotary shaft and the driven-side rotary shaft in different directions is allowed and the transmission vibration between the two shafts is absorbed by the deformation characteristics of the elastomer members 6 and 1,52. It is.

This will be described in more detail. When the distance between the drive-side spool 3 and the driven-side spool 4 is changed by the torsional input, the first connecting band 51 or the second connecting band is accordingly connected. A tensile force acts on 52. For example, as shown in FIG. 3, when the driving-side bobbin ring 3 is relatively displaced in the direction of the arrow F, the second connecting band 52 receives a tensile force. The second connecting band 5
Since it acts on the thin portion 5a of the wire 5 constituting the wire 2 on the inner layer side of the loop, the spring constant in the torsional direction can be suppressed low. Further, as the amount of torsional displacement increases due to a subsequent increase in torque, the tensile force also acts on the portion 5b of the wire 5 having a larger wire diameter on the outer peripheral layer side of the wire 5, so that the drive-side bobbin ring is formed. Excessive torsional displacement between 3 (drive-side connector 1) and driven-side bobbin ring 4 (driven-side connector 2) is suppressed, and torque is reliably transmitted. In other words, the impact is effectively reduced by lowering the spring constant in the torsional direction for the input of the initial torque,
In addition, the required performance of reliably transmitting torque is satisfied.

Further, the first connecting band 51 or the second connecting band 5 in a portion where the distance between the driving side bobbin ring 3 and the driven side bobbin ring 4 which are circumferentially adjacent to each other is increased by the torsional input.
The amount of tensile deformation of the outer peripheral portion (hereinafter, referred to as the outer peripheral portion) 51b, 52b is larger than the portions 51a, 52a of the elastomer member 6 that extend relatively on the inner peripheral side.
However, in the outer peripheral portions 51b and 52b, the wire diameter of the wire 5 is larger as the outer layer has a larger amount of tension, so that the wire 5 is less likely to be cut.

FIG. 4 is a half sectional view of a coupling according to a second preferred embodiment of the present invention, taken along a plane perpendicular to the axis. The first connecting band 51 and the second connecting band 52 in this coupling are formed on outer peripheral side portions 51b, 5b.
Reference numeral 2b denotes a state in which the first and second connection bands 51, 52 are slackened inwardly between the driving side winding ring 3 and the driven side winding ring 4, and are provided on the outer periphery of the elastomer member 6. It is characterized in that six outer circumferential recesses 6b are formed in the circumferential direction corresponding to the slack portions of. Other configurations are shown in FIG.
It is almost the same as

The first and second connecting bands 51 and 52 are formed by winding a wire having a uniform diameter in a multilayer shape. However, similar to the first embodiment, the first and second connecting bands 51 and 52 are formed on the inner peripheral layer side. A wire having a wire diameter varying in the longitudinal direction may be wound so that the wire diameter is small and the wire diameter is large on the outer peripheral layer side.

This coupling comprises a first connecting band 51 in which three drive-side thread winding rings 3 and driven-side thread winding rings 4 alternately arranged at intervals of 60 ° in the circumferential direction are wound in a loop.
5 and the second connecting band 52 are connected alternately.
As shown in FIG. 7, a mold cavity 7 for molding an elastomer member is provided.
And vulcanized by filling with an elastomer molding material. In the mold cavity 7, an intermediate convex portion 7 corresponding to the window portion 6a of the elastomer member 6 is provided.
a and an outer peripheral convex portion 7b corresponding to the outer peripheral concave portion 6b of the elastomer member 6. The distal end of the outer peripheral convex portion 7b is wound around the drive side thread winding ring 3 and the driven side thread winding ring 4. The first and second connecting bands 51 and 52 are provided with slacks on the outer peripheral sides 51b and 52b toward the inner peripheral side. Then, by filling the mold cavity 7 with the elastomer molding material in this state, the coupling shown in FIG. 4 is obtained.

According to this embodiment, the driving-side bobbin ring 3
And the first and second connecting bands 5 between the
Since the outer peripheral portions 51b, 52b of the first and second 52 are slackened to the inner peripheral side, in the portion where the distance between the driving side thread winding ring 3 and the driven side thread winding ring 4 is increased by the torsion input, at the beginning of the torsion input, The outer peripheral portion 51b of the first connecting band 51 or the outer peripheral portion 52b of the second connecting band 52 is subjected to displacement toward the outer peripheral side so that the slack is extended. In this portion, the thickness of the elastomer member 6 is reduced by the outer peripheral concave portion 6b and the window portion 6a.
Or, 52b is easily displaced to the outer peripheral side, so that the spring constant in the torsional direction becomes low, so that torsional vibration and the like are effectively absorbed. Further, the relative displacement between the drive-side thread winding ring 3 and the driven-side thread winding ring 4 due to the torsional input is increased to a predetermined value or more, so that the outer peripheral portion 51 of the first connecting band 51 or the outer peripheral portion 52b of the second connecting band 52 is increased. When the slack is fully extended, the spring constant increases from this point due to the tensile elasticity of the first connection band 51 or the second connection band 52, and an excessive torsional displacement between the driving side and the driven side becomes large. As a result, the torque is reliably transmitted.

As described above, in this type of coupling, the first and second connection bands 5 associated with the torsional input are provided.
The displacement amounts of the outer peripheral portions 51b and 52b are larger than those of the inner peripheral portions 51a and 52a. However, since the outer peripheral portions 51b and 52b are slackened, the displacement amounts due to the displacement are increased. Rubbing is suppressed, and therefore, fraying of the wire 5 of the first and second connecting bands 51 and 52 is effectively prevented.

The slack of the outer peripheral portions 51b, 52b in the first and second connecting bands 51, 52 can be arbitrarily set by the height h of the outer convex portion 7b provided in the mold cavity 7. If the amount of slack is increased, the allowable twist angle and the amount of axial displacement are increased, and the amount of torsional displacement maintained at a low spring constant is increased.
Conversely, if the slack amount is reduced, the allowable twist angle and axial displacement amount are small, and the torsional displacement amount maintained at a low spring constant is small. Therefore, the characteristics of the coupling can be set arbitrarily.

FIG. 6 is a half sectional view showing a third preferred embodiment of the coupling according to the present invention, taken along a plane perpendicular to the axis. In the embodiment shown in FIG. 4 described above, the outer peripheral portions 51b, 52b of the first connecting band 51 and the second connecting band 52 are formed in such a manner that the outer peripheral portions 51b, 52b are formed between the driving side bobbin ring 3 and the driven side bobbin ring 4. In this embodiment, the outer peripheral portions 51b and 52b of the first connecting band 51 and the second connecting band 52 are in a state of being slackened to the circumferential side, and the driving side bobbin ring 3 and the driven side It is characterized in that a slack toward the outer peripheral side is given in the middle of the spool 4. There is no outer peripheral concave portion 6b in the outer peripheral portion of the elastomer member 6 as in the second embodiment, and the window portion 6a located between the thread winding rings 3 and 4 corresponds to the slack shape of the outer peripheral side portions 51b and 52b. It takes on a shaped shape. Other configurations are almost the same as those in FIG. 1 or FIG.

In this embodiment, the first and second connecting bands 51 and 52 are formed by winding a wire having a uniform diameter in a multilayer shape. A wire having a wire diameter varying in the longitudinal direction can be wound so that the wire diameter is thinner on the outer layer side and larger on the outer layer side.

Basically, similarly to the second embodiment, first, the three drive-side thread winding rings 3 and the driven-side thread winding rings 4 alternately arranged at intervals of 60 ° in the circumferential direction are connected to the first coupling. Are alternately connected by a connecting band 51 and a second connecting band 52,
In this state, as shown in FIG. 7, it is manufactured by incorporating it into a mold cavity 7 for molding an elastomer member, filling an elastomer molding material, and vulcanizing. In the mold cavity 7, an intermediate convex portion 7a corresponding to the window 6a of the elastomer member 6 is provided so as to be detachable or movable, and a tip portion of the intermediate convex portion 7a facing the outer periphery of the mold is provided with:
A pressing member 7c is formed which presses the outer peripheral portion 51b of the first connecting band 51 or the outer peripheral portion 52b of the second connecting band 52 to the outer peripheral side to be loosened. Therefore, the outer peripheral side portions 51b and 52b are appropriately slackened toward the outer peripheral side, and in this state, the mold cavity 7 is filled with the elastomer molding material. Then, after the molding is completed, the mold is opened, and the intermediate convex portion 7a is extracted, whereby the coupling shown in FIG. 6 is obtained. Reference numeral 7d is provided at both ends in the axial direction of the pressing member 7c, and is provided on the outer peripheral side portion 51b.
Or, it is a flange portion for preventing detachment of 52b.

In this embodiment, as in the second embodiment, in the portion where the drive-side spool 3 and the driven-side spool 4 are displaced in the direction in which the drive-side spool 3 and the driven-side spool 3 are relatively separated by torsion input, Until the outer peripheral portion 51b of the connecting band 51 or the outer peripheral portion 52b of the second connecting band 52 is displaced inward and the loosening thereof is eliminated, the spring constant in the torsional direction is kept low. Vibration and the like can be effectively absorbed, and the first connection band 5
The spring constant is increased by the tensile elasticity of the first or second connection band 52, and reliable torque transmission is performed. Further, since the outer peripheral side portions 51b and 52b are slackened, rubbing when tension is applied is suppressed, and fraying of the wire 5 of the first and second connecting bands 51 and 52 is effectively prevented. Is done.

The present invention is not construed as being limited to the illustrated embodiment. For example, the arrangement interval between the drive-side connector 1 and the driven-side connector 2 does not necessarily have to be equally spaced in the circumferential direction as shown in the figure, and is determined according to the specifications of the shaft end yoke to be mounted. Things.

[0033]

According to the coupling of the present invention, the spring constant in the torsional direction can be kept low at the beginning of the torsional input, so that the torsional vibration and the like can be effectively absorbed, and the drive-side pincushion ring and the driven-side pincushion ring due to the torsional input. When the relative displacement of the motor increases, different required performances such as a higher spring constant in the torsional direction and an increased torque transmission force can be satisfied at the same time. In addition, since the outer peripheral side portions of the first and second connecting bands are effectively prevented from being worn due to the torsional input, characteristic changes are unlikely to occur, and the initial performance can be maintained for a long time.

[Brief description of the drawings]

1A and 1B show a preferred first embodiment of a coupling according to the present invention, wherein FIG. 1A is a half-sectional view cut along a plane perpendicular to an axis, and FIG. 1B is BB in FIG. It is sectional drawing cut | disconnected by the line.

FIG. 2 is an explanatory view partially showing wires constituting first and second connection bands in the first embodiment.

FIG. 3 is an explanatory diagram showing an operation in the first embodiment.

FIG. 4 is a half sectional view of a second preferred embodiment of the coupling according to the present invention, taken along a plane perpendicular to the axis.

FIG. 5 is an explanatory view showing a manufacturing process of the coupling according to the second embodiment.

FIG. 6 is a half sectional view of a third preferred embodiment of the coupling according to the present invention, which is cut by a plane perpendicular to the axis.

FIG. 7 is an explanatory diagram showing a manufacturing process of the coupling according to the third embodiment.

FIG. 8 is a cross-sectional view showing an example of a coupling according to a conventional technique, cut along a plane perpendicular to an axis.

FIG. 9 is a cross-sectional view of the coupling according to the related art, cut along a plane passing through an axis.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 drive side connector 2 driven side connector 3 drive side wound ring 31, 41 sleeve 32, 42 collar 4 driven side wound ring 5 wire 5a thin part of wire diameter 5b thick part of wire diameter 51 first connecting band 51a, 52a inner peripheral side portion 51b, 52b outer peripheral side portion 52 second connecting band 6 elastomer member 6a window 6b outer peripheral concave portion 7 mold cavity 7a intermediate convex portion 7b outer peripheral convex portion 7c pressing member 7d flange portion

Continued on the front page (72) Inventor Hiroshi Kawai 4-3-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa N.K.Megrastic Co., Ltd. In-house (72) Inventor Ryoichi Oda 4 Tsujido Shinmachi, Fujisawa-shi, Kanagawa 3-1 NOK MEGRASTIC CORPORATION In-house

Claims (2)

[Claims] 1. A plurality of and the same number of drive side spools (3) and driven side spools (4) alternately arranged at predetermined intervals in a circumferential direction, and the drive side spools adjacent to each other in the circumferential direction. A first connecting band (51) wound around in a loop over (3) and the driven side bobbin ring (4) and having an appropriate tensile elasticity, and the first connecting bands (51) circumferentially adjacent to each other; A second connecting band having appropriate tensile elasticity wound around the driving side wound ring (3) and the driven side wound ring (4) adjacent to each other in the circumferential direction between the bands (51). (52), an elastomer member formed in a state in which the drive-side wound ring (3), the driven-side wound ring (4), and the first and second connecting bands (51, 52) are embedded, and are continuous in the circumferential direction. (6), wherein each of the first and second connecting bands (51, 52) is one end to the other end. A cup comprising a wire (5) having a larger wire diameter wound in a multilayer shape, wherein the wire (5) has a relatively larger wire diameter on the outer layer side of the loop. ring. 2. A plurality of and the same number of drive side spools (3) and driven side spools (4) alternately arranged at equal intervals in the circumferential direction, and the drive side spools adjacent to each other in the circumferential direction. (3) and a first connecting band (51) wound around in a loop over the driven side bobbin ring (4) and having tensile elasticity, and the first connecting bands (51) adjacent in the circumferential direction. 51), the second connecting band (52) having a suitable tensile elasticity and wound around the driving side wound ring (3) and the driven side wound ring (4) adjacent to each other in the circumferential direction in a loop. ), An elastomer member (6) molded in a state in which the drive-side spool (3), the driven-side spool (4), and the first and second connecting bands (51, 52) are embedded and continuous in the circumferential direction. ), And each of the first and second connection bands (51, 52) is provided with a corresponding one of the thread-wound rings (3, 4). Coupling, characterized in that given a partial slack between.