JP4563479B2 - Elastic joint - Google Patents

Description

  The present invention relates to an elastic joint, and in particular, even when an excessive bending input in a direction orthogonal to the axial direction of the driving shaft or driven shaft is loaded on the driving side collar (driven side collar). Even when the displacement of the cylindrical member (driven inner cylinder member) can be prevented and the wall thickness (radial thickness) of the driving inner cylindrical member (driven inner cylinder member) is reduced, The present invention relates to an elastic joint capable of securing a seating surface of a driving side fastening member (driven side fastening member).

  In a power transmission portion such as a drive shaft and a propeller shaft of an automobile, an elastic joint having a vibration damping function is used as a coupling for transmitting rotational torque from a drive shaft to a driven shaft.

  A conventional elastic joint is disclosed in Patent Document 1. In such an elastic joint, a plurality of (three) driving side collars connected to the driving shaft and a driven side collar connected to the driven shaft are arranged alternately on a concentric circle, and between adjacent collars. An endless fiber cord bundle made of a cord such as a synthetic fiber yarn is wound around, and each of these collars and the fiber cord bundle is embedded in an elastic body such as rubber or synthetic resin.

  In order to reinforce the inner cylinder member, a cylindrical drive side inner cylinder member and a driven side inner cylinder member are press-fitted into the driving side collar and the driven side collar, respectively. Therefore, a bolt or the like is inserted into the through hole of the driving side inner cylinder member and fastened to one end of the driving side inner cylinder member, and the bolt or the like is inserted into the through hole of the driven side inner cylinder member to By fastening to the end, the driving side collar is fixed to the shaft end portion of the driving shaft, and the driven side collar is fixed to the shaft end portion of the driven shaft.

Thus, power (torque) is transmitted from the drive shaft side to the driven shaft side while absorbing vibration and torsion between the drive side collar (drive shaft) and the driven side collar (driven shaft).
Japanese Patent Laid-Open No. 2003-120712

  However, in the conventional elastic joint described above, when the thickness of the inner cylinder member (the thickness in the radial direction) is reduced for the purpose of reducing the weight, it is possible to secure the seating surface of the bolt inserted into the inner cylinder member. There was a problem if I couldn't.

  In addition, when an excessive input is applied to the drive shaft or the driven shaft in the axial direction and in a direction orthogonal to the axial direction, the driving side inner cylinder member (with respect to the driven side collar) There is a problem in that the driven inner cylinder member) is relatively displaced and the driving inner cylinder member (driven inner cylinder member) is displaced with respect to the driving collar (driven collar).

  The present invention has been made to solve the above-described problems, and even when an excessive bending input in a direction perpendicular to the axial direction is applied to the drive shaft or the driven shaft, the drive-side collar The drive-side inner cylinder member (driven-side inner cylinder member) can be prevented from shifting with respect to the (driven-side collar), and the thickness (radial thickness) of the drive-side inner cylinder member (driven-side inner cylinder member) can be reduced. Even if it is a case where it thins, it aims at providing the elastic coupling which can ensure the seating surface of a drive side fastening member (driven side fastening member).

  In order to achieve this object, the elastic coupling according to claim 1 is arranged alternately with a plurality of drive side connection elements connected to the drive shaft via drive side fastening members, and concentrically with the drive side connection elements. A plurality of driven-side connection elements connected to the driven shaft via driven-side fastening members, the drive-side connection elements adjacent to each other, and an endless shape formed by winding a fiber cord around the driven-side connection elements A plurality of fiber cord bundles, and a plurality of fiber cord bundles, the plurality of drive side connection elements, and an elastic body in which the plurality of driven side connection elements are embedded, A cylindrical driving-side collar around which the fiber cord is wound, and a cylindrical driving-side inner cylindrical member that is press-fitted into an inner peripheral hole of the driving-side collar and through which the shaft portion of the driving-side fastening member is inserted. The driven side connection The child includes a cylindrical driven side collar around which the fiber cord is wound, and a cylindrical driven side inner cylinder that is press-fitted into the inner peripheral hole of the driven side collar and through which the shaft portion of the driven side fastening member is inserted. A drive-side inner cylinder member that protrudes outward in the radial direction of the inner cylinder member from one end in the axial direction of the drive-side collar at one end in the axial direction of the drive-side collar. The driving side fastening member includes a stepped portion to which the head of the driving side fastening member is pressed, and the driven side inner cylindrical member is connected to the other end in the axial direction of the driven side collar and the other end in the axial direction of the driven side collar. And a stepped portion that protrudes outward in the radial direction of the inner cylinder member and to which the head of the driven side fastening member is pressed, and the outer edge of the stepped portion of the drive side inner cylinder member is the drive side As viewed from the axial direction of the inner cylinder member, the fiber cord bundle is disposed inside the outer edge, and the The outer edge of the stepped portion of the dynamic-side inner cylinder member, when viewed from the axial direction of the driven-side inner tube member, is disposed inside the outer edge of the fiber cord bundles.

  According to a second aspect of the present invention, in the elastic joint according to the first aspect, the elastic joint circumscribes the elastic body formed in a polygonal shape when viewed from the axial direction of the drive side connection element or the driven side connection element, and is virtual. When the elastic body circumscribed circle, which is a circle, is set, a meat stealing portion that is a gap provided between the elastic body circumscribed circle and the elastic body is provided, and the elastic body is adjacent to the drive side connection. Comprising a punched portion that is a hole drilled in the axial direction of the drive side connecting element or the driven side connecting element between the element and the driven side connecting element, and the circumferential width of the punched portion is: It is set smaller than the winding thickness of the fiber cord bundle, and the radial width of the meat stealing portion is set smaller than the circumferential width of the punched portion.

  The elastic joint according to claim 3 is the elastic joint according to claim 2, wherein the fiber cord bundle is wound around the drive side connection element or the driven side connection element, and the drive side is provided adjacent thereto. A rubber extending in a radial direction between the hole punching portion and the extension portion of the fiber cord bundle, the extension portion extending linearly between the connection element and the driven side connection element Compared to the thickness, the rubber thickness in the circumferential direction of the elastic body between the punched portion and the winding portion of the fiber cord bundle is set to be thin.

  According to a fourth aspect of the present invention, in the elastic joint according to the third aspect, the distance between the axis of the drive side connecting element and the axis of the driven side connecting element which are adjacent to each other is determined by the cord circumscribed circle. Is set to be shorter than the distance from the outer center to the axis of the drive side connection element or the driven side connection element.

  According to the elastic joint of claim 1, the driving side connecting element connected to the driving shaft via the driving side fastening member and the driven side connecting element connected to the driven shaft via the driven side fastening member are fibers. By being connected via the cord bundle, power (torque) is transmitted from the drive shaft to the driven shaft.

  More specifically, the shaft portion of the driving side fastening member is inserted into the cylindrical driving side inner cylinder member press-fitted into the inner peripheral hole of the cylindrical driving side collar, and the inner periphery of the cylindrical driven side collar. Driven through the fiber cord bundle in which the fiber cord is wound around the drive side collar and the driven side collar by inserting the shaft portion of the driven side fastening member into the driven side inner cylinder member press-fitted into the hole. Power (torque) is transmitted from the shaft to the driven shaft. In this case, the vibration and torsion generated between the drive shaft and the driven shaft are absorbed by the elastic deformation of the elastic body and the fiber cord bundle buried in the elastic body, thereby improving the riding comfort. .

  Here, according to the elastic joint according to claim 1, the head of the driving side fastening member is pressed against the stepped portion of the driving side inner cylindrical member, and the driven side fastening is performed on the stepped portion of the driven side inner cylindrical member. Since the head of the member is pressed, even if excessive bending input in the direction perpendicular to the axial direction of the drive shaft (driven shaft) is applied to the elastic joint, the drive side collar and the driven side collar There is an effect that it is possible to prevent the driving-side inner cylinder member and the driven-side inner cylinder member from being displaced.

  More specifically, the stepped portion to which the head of the driving side fastening member is pressed is projected from one end in the axial direction of the driving side collar in the radial direction to the outside of the driving side collar. Even when excessive bending input in a direction perpendicular to the direction is applied to the drive shaft, one end of the drive side collar is abutted against the stepped portion of the drive side inner cylinder member, and the drive side collar The relative displacement of the cylindrical member is restricted.

  Similarly, the stepped portion, to which the head of the driven side fastening member is pressed, projects from the other end in the axial direction of the driven side collar in the radial direction to the outside of the driven side collar. Even when excessive bending input in the direction orthogonal to the direction is applied to the driven shaft, the other end of the driven side collar is abutted against the stepped portion of the driven side inner cylindrical member, and the driven side with respect to the driven side collar The relative displacement of the inner cylinder member is restricted.

  Therefore, even when an excessive bending input in a direction orthogonal to the axial direction of the drive shaft (driven shaft) is loaded on the elastic joint, the drive side inner cylinder member and the driven side with respect to the drive side collar and the driven side collar The displacement of the inner cylinder member can be prevented. Therefore, there is an effect that the shake of the shaft center of the elastic joint which is a rotating body can be suppressed.

  Further, since the stepped portion of the drive side inner cylinder member projects outwardly in the radial direction from one end of the drive side collar in the axial direction, it faces toward the other end in the axial direction of the drive shaft (toward the driven shaft). When an excessive load is applied to the elastic joint, the stepped portion is abutted against one end of the driving side collar, and the relative displacement of the driving side inner cylinder member toward the other end with respect to the driving side collar is restricted.

  On the other hand, the stepped portion of the driven-side inner cylinder member projects outward in the radial direction from the other axial end of the driven collar, so that the end of the driven-side inner cylindrical member faces the one end (the drive shaft). When an excessive load is applied to the elastic joint, the stepped portion is abutted against the other end of the driven side collar, and the relative displacement of the driven side inner cylindrical member toward the one end with respect to the driven side collar is restricted.

  As a result, even when an excessive load is applied to the elastic joint in the axial direction of the drive shaft (driven shaft) toward the other end (driven shaft) and one end (driven shaft), The relative displacement of the inner cylinder member with respect to the collar is regulated by the stepped portion of the driving side inner cylinder member for the load of 1 mm and by the stepped portion of the driven side inner cylinder member for the load directed to one end. Therefore, there is an effect that it is possible to prevent the driving side inner cylinder member from falling off from the driving side collar and the driven side inner cylinder member from falling off from the driven side collar.

  Further, since the stepped portion is protruded from the driving side inner cylinder member, a seating surface can be secured on the driving side inner cylinder member so that the head of the driving side fastening member abuts, and a step is formed on the driven side inner cylinder member. Since the attachment portion is protruded, it is possible to secure a seating surface with which the head of the driven side fastening member abuts.

  Therefore, even when the driving side inner cylinder member and the driven side inner cylinder member are thinned, the driving side fastening member is one end of the driving side inner cylinder member, and the driven side fastening member is the other end of the driven side inner cylinder member. In addition, there is an effect that each can be firmly fixed.

  In addition, the outer edge of the stepped portion of the driving side inner cylinder member as viewed from the axial direction of the driving side inner cylinder member is disposed inside the outer edge of the fiber cord bundle as viewed from the axis direction of the driving side inner cylinder member. In addition, the outer edge of the stepped portion of the driven side inner cylinder member as viewed from the axial direction of the driven side inner cylinder member is arranged inside the outer edge of the fiber cord bundle as viewed from the axis direction of the driven side inner cylinder member. Therefore, it is possible to avoid the stepped portion from reducing the portion (the portion that can contribute to the elastic deformation in the axial direction of the elastic body) disposed between the driving side collar and the driven side collar of the elastic body.

  Therefore, even when the stepped portion is provided, a portion that can contribute to elastic deformation in the axial direction of the elastic body (a portion of the free length of the elastic body) can be secured, and the stepped portion is obstructed. In addition, since the free length portion of the elastic body can be elastically deformed in the axial direction, it is possible to reliably absorb displacement due to axial vibration or twist generated between the drive shaft and the driven shaft. effective.

  According to the elastic joint of claim 2, in addition to the effect of the elastic joint of claim 1, the circumferential width of the punched portion is set smaller than the winding thickness of the fiber cord bundle. The volume of the space portion of the punched portion can be reduced as compared with the case where the thickness is set larger than the winding thickness of the cord bundle. Therefore, since the rubber amount of the elastic body arranged inside the fiber cord bundle can be secured, the drive side connection element and the driven side connection element can be securely held by the elastic body, and the drive side connection element (drive shaft) When driving power (torque) is transmitted from the motor to the driven side connecting element (driven shaft), the steering stability can be improved.

  Moreover, since the circumferential width of the punched portion is set to be larger than the radial width of the stealer, the inner side of the fiber cord bundle that tends to be hot at a portion closer to the shaft center than the stealer side of the elastic joint While improving the heat dissipation of the elastic body arrange | positioned in this, the weight reduction can be achieved.

  In addition, a meat stealing portion that is a gap is provided between the elastic body circumscribed circle and the elastic body, and a punched portion is provided between the adjacent drive side connection element and the driven side connection element to reduce the weight of the elastic body. Even in the case shown, the width in the radial direction of the meat stealing portion is set smaller than the width in the circumferential direction of the punched portion, so that the elastic body can be made close to a perfect circle.

  Therefore, the meat stealing portion can be set to a size that does not cause the shaft center of the elastic joint to be shaken, and the torque transmission performance of the elastic joint can be improved while reducing the weight of the elastic body.

  Further, since the width in the radial direction of the meat stealing portion is set smaller than the circumferential width of the hole punching portion, the width in the radial direction of the meat stealing portion is set larger than the circumferential width of the hole punching portion. Compared to the case, it is possible to ensure a large surface area in the circumferential direction of the elastic body and to improve the cooling performance of the elastic body.

  According to the elastic joint of the third aspect, in addition to the effect produced by the elastic joint according to the second aspect, in the case of providing the holed portion, the elastic body between the holed portion and the extending portion of the fiber cord bundle is provided. Compared to the rubber thickness in the radial direction, the rubber thickness in the circumferential direction of the elastic body between the punched portion and the winding portion of the fiber cord bundle is set to be thin, so that the outer peripheral surface of the driving side collar and the driven side Improving the heat dissipation of the portion of the elastic body (the portion between the hole punching portion and the winding portion of the fiber cord bundle) that easily generates heat due to the contact between the outer peripheral surface of the collar and the winding portion of the fiber cord bundle. Can do. Therefore, it is possible to prevent thermal deterioration of the elastic body and to improve the durability of the elastic joint.

  Further, compared to the rubber thickness in the circumferential direction of the elastic body between the hole punching portion and the winding portion of the fiber cord bundle, the radial direction of the elastic body between the hole punching portion and the extension portion of the fiber cord bundle is Since the rubber thickness is set to be thick, it is possible to secure the rubber thickness of the elastic body necessary when the extending portion of the fiber cord bundle is bent. Therefore, when torque is transmitted between the drive shaft and the driven shaft, vibration and torsion that occur between the drive shaft and the driven shaft are caused by elastic deformation of the elastic body and the fiber cord bundle embedded in the elastic body. Therefore, there is an effect that it can be absorbed more reliably.

  According to the elastic joint according to claim 4, in addition to the effect produced by the elastic joint according to claim 3, the separation distance between the axis of the drive side connection element and the axis of the driven side connection element that are adjacent to each other is The distance between the outer circumference of the cord circumscribing circle and the axis of the drive side connection element or the driven side connection element is set to be shorter than the distance between the axis of the driven side connection element and the axis of the drive side connection element. There is an effect that the durability of the elastic joint can be improved as compared with the case where the distance is set longer than the distance from the outer center of the cord circumscribing circle to the axis of the drive side connection element or the driven side connection element.

  That is, when the same torque is applied, it is possible to suppress the extension of the fiber cord bundle wound between the adjacent drive side connection element and the driven side connection element, and high output is applied to the fiber cord bundle. Even in such a case, breakage of the fiber cord bundle can be prevented. Therefore, the durability of the elastic joint can be improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an elastic joint 1 according to a first embodiment of the present invention, FIG. 1 (a) is a front view of the elastic joint 1, and FIG. 1 (b) is a diagram (I) in FIG. b) It is the side view of the elastic coupling 1 seen from the direction. 2 is a cross-sectional view of the elastic joint 1 taken along line II-II in FIG. 1A, and FIG. 3 is a cross-sectional view of the elastic joint 1 taken along line III-III in FIG. In FIG. 1, the fiber cord bundle 30 is indicated by a broken line. 2 and 3, the arrow F indicates the front of the elastic joint 1, and the arrow B indicates the rear.

  In FIG. 1 to FIG. 3, the same parts are denoted by reference numerals, the other reference numerals are omitted, and the reference numerals are similarly omitted from FIG. 4 to FIG. 13.

  As shown in FIG. 1, the elastic joint 1 is connected to a drive shaft (not shown) corresponding to an output shaft or the like on the engine side, and a plurality of drive side collars 10 arranged in a circle around the axis O1. The drive-side collars 10 are alternately arranged concentrically with a plurality of driven-side collars 20 connected to a driven shaft (not shown) corresponding to a drive shaft and the like, and adjacent drive-side collars 10 and driven-side collars. A plurality of endless fiber cord bundles 30 wound around the collar 20, an elastic body 40 in which the plurality of fiber cord bundles 30, a plurality of driving side collars 10 and a plurality of driven side collars 20 are embedded, and an elastic body 40 Is provided with a through hole 40a drilled in the center.

  As shown in FIGS. 1 to 3, the driving side collar 10 is integrally formed of a relatively light metal material such as aluminum or an alloy thereof such as aluminum or its alloy by using a casting means such as die cast. Further, the driving side collar 10 includes a cylindrical tube portion 11 having O2 as an axis, and a flange portion projecting in the axial diameter direction (the vertical direction in FIGS. 2 and 3) from the outer peripheral surface of the tube portion 11. 12.

  As shown in FIGS. 2 and 3, the cylindrical portion 11 is provided with an inner peripheral hole 11a penetrating in the axial direction (vertical direction in FIGS. 2 and 3) of the axis O2 (see FIG. 1). The drive side inner cylinder member 10a to be pressed is press-fitted. Further, the thickness L13 (the length in the left-right direction in FIGS. 2 and 3) of both end portions (the end portions in the vertical direction of FIGS. 2 and 3) of the cylindrical portion 11 is the thickness L12 (FIG. 2) of the central portion of the cylindrical portion 11. And the thickness in the left-right direction in FIG. 3). Therefore, the rigidity of the both ends of the cylinder part 11 can be improved.

  As shown in FIGS. 1 to 3, the flange portion 12 protrudes from the outer peripheral surface of the driving side collar 10 to the outside in the radial direction (left and right directions in FIGS. 2 and 3) and is viewed from the direction of the axis O <b> 2 (FIG. It is formed in a donut shape (viewed from the front of the sheet of paper) and viewed from the direction orthogonal to the axis O2 (viewed from the front of the sheet of FIG. 2), with respect to the outer peripheral end (the cylindrical portion 11 and the flange portion 12). Are formed in a tapered shape so that the thickness of the flange portion 12 (the length in the vertical direction in FIGS. 2 and 3) gradually increases toward the connection portion. Therefore, sufficient strength of the flange portion 12 can be secured against a relatively large load generated at the time of starting or the like, and the durability of the driving side collar 10 can be improved.

  Further, the thickness of the base portion of the flange portion 12 is set smaller than the minimum thickness L12 of the driving side collar 10. Therefore, it is possible to secure a space for winding the fiber cord 101 (see FIG. 9) of the fiber cord bundle 30 between the first flange portion 12a and the fourth flange portion 12d described later.

  Further, the flange portion 12 includes four flange portions 12a to 12d formed in the same shape. That is, the first flange portion 12a, the second flange portion 12b, the third flange portion 12c, and the fourth flange portion 12d are disposed in order from the front side (upper side in FIGS. 2 and 3). In addition, the separation distance between the second flange portion 12b and the third flange portion 12c facing each other on the center side is the separation distance (third flange between the first flange portion 12a and the second flange portion 12 facing each other on both ends. Is set to be longer than the separation distance between the portion 12c and the fourth flange portion 12d.

  Between a pair of opposing flange portions 12, that is, between the first flange portion 12a and the second flange portion 12, between the second flange portion 12b and the third flange portion 12c, and between the third flange portion 12c and the second flange portion 12c. The fiber cord 101 (refer FIG. 9) which comprises the fiber cord bundle 30 is wound around each outer peripheral surface between 4 flange parts 12d.

  As shown in FIGS. 1 to 3, the driving-side inner cylinder member 10 a is a cylindrical member that has an axis O <b> 2 and is formed in a cylindrical shape from a metal such as iron, and is tightly fitted to the driving-side collar 10. It is press-fitted. The drive side inner cylinder member 10a improves the rigidity of the drive side collar 10.

  A bolt (not shown) fixed to the end of a drive shaft (not shown) is inserted into the inner peripheral hole of the drive side inner cylinder member 10a, and the bolt is fastened to the end surface of the drive side inner cylinder member 10a. ing. Therefore, the drive shaft and the elastic joint 1 are connected via this bolt. The drive-side inner cylinder member 10a has an end portion on the side connected to a drive shaft or a driven shaft (both not shown) protruding from the end surface of the elastic body 40 described later in the direction of the axis O2.

  As shown in FIGS. 2 and 3, the thickness (thickness in the left-right direction in FIGS. 2 and 3) of the driving side inner cylinder member 10 a is set to be thicker than the maximum thickness L <b> 13 of the driving side collar 10. Therefore, the end surface of the drive side inner cylinder member 10a can be used as a seating surface of the bolt (not shown) described above.

  Since the driving side collar 10 and the driven side collar 20 are formed in the same shape, the description of the driven side collar 20 is omitted. Moreover, the cylinder part 21 corresponds to the cylinder part 11, the flange part 22 corresponds to the flange part 12, and the first flange part 12a to the fourth flange part 12d correspond to the first flange part 22a to the fourth flange part 22d. The driving side inner cylinder member 10a corresponds to the driven side inner cylinder member 20a, and the axis O2 corresponds to the axis O3.

  As shown in FIG. 1, four each of the driving side collars 10 and the driven side collars 20 are alternately arranged at equal intervals on the concentric circle of the axis O1. Therefore, the separation distance L1 (the separation distance between the shaft centers O2 and O3) between the adjacent drive side collar 10 and the driven side collar 20 is set to be the same, and the axis O1 of the elastic joint 1 and the drive side collar 10 are separated. Each separation distance L2 from the axis O2 (the axis O3 of the driven collar 20) is also set to be the same, and the separation distance L1 is set to be shorter than the separation distance L2.

  Therefore, compared with the case where the separation distance L1 is set to be longer than the separation distance L2, it is possible to suppress the extension of a fiber cord bundle 30 to be described later that is wound between the driving side collar 10 and the driven side collar 20 that are adjacent to each other, The durability of the elastic joint 1 can be improved.

  Further, as shown in FIGS. 1 to 3, a fiber cord made of synthetic fiber such as polyester fiber is wound in a multilayered manner in a loop between adjacent driving side collar 10 and driven side collar 20. An endless fiber cord bundle 30 for reinforcement formed by this is wound.

  The fiber cord bundle 30 is a member that transmits the rotation of the driving side collar 10 to the driven side collar 20. The fiber cord bundle 30 is rotated by the rotation of the driving side collar 10, and is driven by the fiber cord bundle 30. The side collar 20 is rotated. Thereby, torque can be transmitted from the drive shaft (not shown) side to the driven shaft (not shown) side.

  As shown in FIG. 1, the fiber cord bundle 30 includes a drive side fiber cord wound around each drive side collar 10 and each driven side collar 20 on the rear side in the rotation direction Z when the elastic joint 1 is driven. A bundle 31, each driving side collar 10, and a pair of driven side fiber cord bundles 32 wound around each front side driven collar 20 in the rotation direction Z when the elastic joint 1 is driven are configured. Has been.

  Usually, at the start of driving due to vehicle start-up or normal driving rotation, a large tensile force is exerted between each driving side collar 10 and the driven side collar 20 on the rear side in the rotation direction, that is, on the driving side fiber cord bundle 31. Works. Therefore, as described above, the separation distance between the second flange portion 12b and the third flange portion 12c around which the drive side fiber cord bundle 31 is wound is the first flange portion around which the driven side fiber cord bundle 32 is wound. 12a and the 2nd flange part 12b (the 3rd flange part 12c and the 4th flange part 12d) are set longer than the separation distance. As a result, the number of cords of the drive side fiber cord bundle 31, that is, the cross-sectional area of the entire cord bundle in the direction of the axis O1 (the vertical direction in FIGS. 2 and 2) is the number of cords of the driven side fiber cord bundle 32, that is, the axis of the whole cord bundle. It is set larger than the cross-sectional area in the O1 direction.

  That is, as shown in FIGS. 2 and 3, the driving side fiber cord bundle 31 is in the center of the driving side collar 10 and the driven side collar 20, and the driven side fiber cord bundle 32 is in the driving side collar 10 and the driven side collar. The two ends of 20 are respectively wound around the flange portions 12a to 12d.

  As shown in FIGS. 1 to 3, the drive side fiber cord bundle 31 is wound around the drive side collar 10 and is configured as a semicircular shape when viewed from the axial center O1 direction (front side in FIG. 1). A hanging portion 31a, a linearly extending portion 31b spanning the adjacent driving side collar 10 and driven side collar 20, and a semicircular shape wound around the driven side collar 20 as viewed from the axial center O1 direction. The driven side winding part 31c is provided.

  As shown in FIG. 1, the winding part separation distance L3 from the axis O1 of the elastic joint 1 to the outer edge of the driving side winding part 31a (driven side winding part 31c) (from the axis O1 of the elastic joint 1 to the driving side) The longest separation distance to the fiber cord bundle 31) is set to 76.5 mm, and the extension portion separation from the axial center O1 of the elastic joint 1 to the extension portion 31b on the side of the meat stealing portion 50 (see FIG. 4) described later. The distance L4 (the shortest separation distance from the axis O1 of the elastic joint 1 to the drive side fiber cord bundle 31) is set to 72 mm.

  Therefore, the difference between the winding portion separation distance L3 and the extension portion separation distance L4 is set to 4.5 mm, which is smaller than the winding thickness L5 (6 mm) of the drive side fiber cord bundle 31. Therefore, compared with the case where the difference between the winding portion separation distance L3 and the extension portion separation distance L4 is set larger than the winding thickness L5 (6 mm) of the driving side fiber cord bundle 31, the extension of the driving side fiber cord bundle 31 is increased. The winding direction of the installation portion 31b can be made closer to a virtual cord circumscribing circle m2 (see FIG. 4) in which the plurality of driving side fiber cord bundles 31 and the driven side fiber cord bundles 32 circumscribe when viewed from the direction of the axis O1. it can. Accordingly, the outer shape lines of the plurality of driving side fiber cord bundles 31 and the driven side fiber cord bundles 32 can be brought close to the cord circumscribed circle m2 (perfect circle shape).

  Since the drive side fiber cord bundle 31 and the driven side fiber cord bundle 32 are configured in the same manner except for the cross-sectional area described above, detailed description of the driven side fiber cord bundle 32 is omitted. The drive side winding portion 31a corresponds to the drive side winding portion 32a, the extension portion 31b corresponds to the extension portion 32b, and the driven side winding portion 31c corresponds to the driven side winding portion 32c.

  As shown in FIG. 1, the elastic body 40 is a rubber member formed in an octagonal shape as viewed from the direction of the axis O1 (the front side of FIG. 1). A hole 40b is formed between the side collar 10 and each driven collar 20, and all the holes 40b are formed in the same shape. A specific configuration of the elastic body 40 will be described in detail later with reference to FIGS.

  As shown in FIGS. 2 and 3, the hole punching portion 40 b is continuous with the taper portion 40 </ b> A provided at a lower position on the rear surface (upper surface of FIGS. 2 and 3), in the thickness direction of the elastic joint 1 (FIGS. As shown in FIG. 1, the front side (the lower side in FIGS. 2 and 3) of the punched portion 40b is closed with the thin film 40c, and the hole extends in the vertical direction of FIG. The extraction part 40b is formed in a rectangular shape having an opening width L6 (dimension in the circumferential direction of a circle centered on the axis O1 of the elastic joint 1).

  The spring constant of the elastic body 40 (a first elastic body 41 and a second elastic body 42, which will be described later, see FIG. 4) can be set small by the punched portion 40b. Accordingly, the elastic body 40 is more easily elastically deformed than the case where the hole punching portion 40b is not provided, and therefore vibration generated between the driving side collar 10 (driving shaft) and the driven side collar 20 (driven shaft) and Torsion (deflection) and the like can be absorbed.

  Moreover, the free length of the surface with respect to the elastic deformation of the elastic body 40 (the 1st elastic body 41 and the 2nd elastic body 42 mentioned later) can be earned. Furthermore, the cooling effect can be improved against heat generated by the friction of the fiber cord 101 (see FIG. 9) constituting the fiber cord bundle 30 as the fiber cord bundle 30 rotates. Therefore, the fiber cords of the fiber cord bundle 30 can be prevented from being broken, and the durability thereof can be improved.

  Further, the opening area of the punched portion 40b is gradually reduced as it approaches the thin film 40c. That is, the opening width L6 of the punched portion 40b is set to 4 mm at the maximum on the taper portion 40A side and set to 2.5 mm at the minimum on the thin film 40c side.

  Therefore, the opening width L6 of the punched portion 40b is set smaller than the winding thickness L5 (6 mm) of the driving side fiber cord bundle 31. Therefore, compared with the case where the opening width L6 of the punched portion 40b is set larger than the winding thickness L5 of the drive side fiber cord bundle 31, the volume of the space portion of the punched portion 40b can be reduced. Therefore, it is possible to secure the rubber amount of the elastic body 40 (first elastic body 41 and second elastic body 42 described later), a plurality of driving side collars 10, a plurality of driven side collars 20, and a plurality of driving sides. The fiber cord bundle 31 and the plurality of driven side fiber cord bundles 32 can be stably held by the elastic body 40 by the elastic body 40.

  Moreover, since the opening width L6 of the punched portion 40b is minimized on the thin film 40c side, the area of the thin film can be set to the smallest. Therefore, when the elastic body 40 (the 1st elastic body 41 and the 2nd elastic body 42 mentioned later) elastically deforms, the deformation amount of the thin film 40c can be suppressed and it can prevent that the crack generate | occur | produces in the thin film 40c. . The rubber thicknesses L7 and L8 (see FIG. 4) of the portion disposed between the punched portion 40b and the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32 will be described in detail later with reference to FIG. explain.

  As shown in FIGS. 2 and 3, the front side (the lower side of FIGS. 2 and 3) of the punched portion 40b is closed with the thin film 40c, and the front side of the thin film 40c (the lower side of FIGS. 2 and 3). ) Is formed with a step 40e that is recessed by one step from the front surface of the elastic body 40. The rubber thickness of the thin film 40c is set to 1 mm.

  The elastic joint 1 is assembled to a drive shaft and a driven shaft (both not shown) with the thin film 40c facing the vehicle front side. By directing the thin film 40c toward the front of the vehicle, it is possible to prevent dirt such as wind and mud from entering the punched portion 40b. Therefore, it is possible to prevent the wind noise generated when the wind enters the punched portion 40b and the clogging of the punched portion 40b caused by the entry of dirt such as mud.

  Further, an identification mark 40d such as a convex portion formed integrally with the molding of the elastic body 40, for example, in the vicinity of the drive side collar 10 in the elastic body 40 is provided on one end side surface in the direction of the axis O1 same as the side having the thin film 40c. Is formed. The identification mark 40d is arranged in a position where the extension portion 31b on the side away from the axis O1 of the drive side fiber cord bundle 31 and a part thereof overlap in the direction of the axis O1 of the elastic joint 1.

  By the identification mark 40d, the driving side collar 10 and the driven side collar 20 formed in the same shape are connected to the driving side collar 10 connected to the driving shaft (not shown) and the driven shaft (not shown). The front side (FIG. 2 and FIG. 3 lower surface) and rear surface (FIG. 2 and FIG. 3 upper surface) of the elastic joint 1, that is, the side on which the thin film 40 c is formed. The other side can be easily identified.

  Therefore, when the elastic joint 1 is assembled to the drive shaft and the driven shaft (both not shown), the identification mark 40d is used as a mark, that is, depending on the presence or absence of the identification mark 40d, the driving side collar 10 or the driven side collar. 20 can be easily identified, and the front surface (lower surface of FIGS. 2 and 3) and the rear surface (upper surface of FIGS. 2 and 3) of the elastic joint 1 can be easily identified.

  Therefore, the bolt (not shown) is fixed to the end of the drive shaft (not shown) on the drive side collar 10 (drive side inner cylinder member 10a) with the thin film 40c facing the vehicle front side (right side in FIGS. 2 and 3). And the operation of attaching a bolt (not shown) fixed to the end of the driven shaft (not shown) of the driven side collar 20 (driven side inner cylinder member 20a). it can.

  The identification mark 40d is preferably provided in the vicinity of all the driving side collars 10, but it may be provided in the vicinity of one driving side collar 10. In this case as well, the driving side collar 10 and the follower are driven. Since the side collars 20 are alternately arranged, the driving side collar 10 and the driven side collar 20 can be easily identified.

  Further, the identification mark 40d can be attached in the vicinity of the driving collar 10 by a processing means after the elastic body 40 is molded, but it is desirable to form the identification mark 40d at the same time as the elastic body 40 is molded.

  The identification mark 40d may be a concave portion in addition to the convex portion, and the shape is not limited to a circular shape as shown in the figure, and may be a square or a dot or a linear convex portion or concave portion. In practice, the convex portion formed integrally with the elastic body 40 in the vicinity of the driving side collar 10 and the driven side collar 20 does not affect the driving side fiber cord bundle 31 or the driven side fiber cord bundle 32 inside. It can be formed, and it can be easily confirmed visually, and can also be confirmed by touch.

  Next, the elastic body 40 will be described with reference to FIGS. 4 is a partially enlarged front view of the elastic joint 1 of FIG. 1 (a), FIG. 5 is a cross-sectional view of the elastic joint 1 taken along line VV of FIG. 1 (b), and FIG. It is sectional drawing of the elastic coupling 1 in the VI-VI line of FIG.1 (b). 7A is a cross-sectional view of the elastic joint 1 taken along line VIIa-VIIa in FIG. 4A, and FIG. 7B is an elastic joint 1 taken along line VIIb-VIIb in FIG. 4A. FIG. 8A is a cross-sectional view of the elastic joint 1 taken along line VIIIa-VIIIa in FIG. 4A, and FIG. 8B is an elastic joint 1 taken along line VIIIb-VIIIb in FIG. 4A. FIG.

  Further, in FIG. 6, a part of the drive side fiber cord bundle 31 and the driven side fiber cord bundle 32 are illustrated by broken lines, and in FIGS. 4 to 6, the elastic body 40 is seen from the direction of the axis O <b> 1 of the elastic joint 1. A circumscribing virtual elastic body circumscribed circle m1 is illustrated by a two-dot chain line, and in FIG. 4, a plurality of driving side fiber cord bundles 31 and driven side fiber cord bundles 32 are circumscribed as viewed from the direction of the axis O1 of the elastic joint 1. An imaginary code circumscribing circle m2 is shown by a two-dot chain line. In FIGS. 7B and 8B, the driving side collar 10 and the driven side collar 20 are not shown.

  Further, in FIG. 6, the portion indicated by K1 in FIG. 6 is enlarged, and in FIG. 7A, the portion indicated by K2 in FIG. 7A is enlarged, and in FIG. 7B. 7 (b) is an enlarged view of a portion indicated by K3, FIG. 8 (a) is an enlarged view of a portion indicated by K4 of FIG. 8 (a), and FIG. The portion indicated by K5 in FIG. 8 (b) is enlarged.

  As shown in FIGS. 4 to 6, the elastic body 40 includes a plurality of driving side collars 10, a plurality of driven side collars 20, a plurality of driving side fiber cord bundles 31, and a plurality of driven side fiber cord bundles 32. It is an elastic member integrally formed with.

  That is, at least the inner peripheral hole of each driving side collar 10 (driving side inner cylinder member 10a) and the inner peripheral hole of each driven side collar 20 (driven inner cylinder member 20a) are exposed to the outside. Each drive side collar 10 and each driven side collar 20 around which the fiber cord bundle 31 and each driven side fiber cord bundle 32 are wound are set in a molding die (not shown), and an elastic member (rubber material) is placed on the molding die. ) And vulcanized, the elastic body 40 is integrally vulcanized and molded with each driving side collar 10, each driven side collar 20, each driving side fiber cord bundle 31, and each driven side fiber cord bundle 32. Yes.

  As shown in FIGS. 5 and 6, the elastic body 40 is an octagon that is concentric with the axis O1 of the elastic joint 1 and penetrates in the direction of the axis O1 (from the front to the back in FIG. 5 and FIG. 6). Between the through hole 40a, which is a hole having a shape, and a virtual elastic body circumscribed circle m1 that circumscribes the elastic body 40 as viewed from the direction of the axis O1 of the elastic joint 1 and the elastic body 40 (fourth elastic body 44 described later). By providing eight meat stealing portions 50, which will be described later, which are gaps, they are formed in an octagonal donut shape when viewed from the axial center O1 of the elastic joint 1 (viewed from the front side of FIGS. 5 and 6). . The meat stealing unit 50 will be described in detail later.

  Further, as shown in FIGS. 5 and 6, the elastic body 40 includes a plurality of first elastic bodies 41 arranged between each driving side collar 10 and the driven side collar 20 on the rear side in the rotation direction Z. A plurality of second elastic bodies 42 arranged concentrically and alternately with the first elastic bodies 41 and between the driving side collars 10 and the driven side collars 20 on the front side in the rotation direction Z; And the third elastic bodies 43 arranged on the axis O1 side (inner peripheral side) of the plurality of first elastic bodies 41 and the plurality of second elastic bodies 43, which are alternately arranged in a concentric manner. A plurality of first elastic bodies 41 and a plurality of second elastic bodies 43, and a fourth elastic body 44 disposed on the side of the meat stealer 50.

  As shown in FIGS. 4 and 5, the first elastic body 41 is in the line of the driving side fiber cord bundle 31 in the direction of the axis O1 of the elastic joint 1 (from the front side to the back side in FIG. 5). Except between the first flange portions 12a and 22a and the second flange portions 12b and 22b and between the third flange portions 12c and 22c and the fourth flange portions 12d and 22d (FIG. 7B). )), A rubber member disposed between the outer periphery of the cylindrical portion 11 of the driving side collar 10 and the outer periphery of the cylindrical portion 21 of the driven side collar 20 on the rear side in the rotational direction thereof. The hole punching portion 40b described above is formed in the center with the side collar 20.

  Moreover, as shown in FIG.4 and FIG.7 (a), rubber | gum thickness L7a of the 1st elastic body 41 between the punching part 40b and the extension part 31b of the drive side fiber cord bundle 31 (FIG. 7 (a)). The dimension in the left-right direction) is set so as to increase gradually in the direction in which the hole 40b is drilled (from the top to the bottom in FIG. 7A), and the opening side (the front side in FIG. 4 and FIG. 7A). ) Upper side) is set to a minimum of 4 mm, and the thin film 40c side (the back side in FIG. 4, the lower side of FIG. 7A) is set to a maximum of 4.5 mm.

  Furthermore, as shown in FIG.4 and FIG.7 (b), the 1st arrange | positioned between the punching part 40b and the drive side winding part 32a (driven side winding part 32c) of the driven side fiber cord bundle 32 is shown. The rubber thickness L8a of the elastic body 41 (the dimension in the left-right direction in FIG. 7B) is set so as to gradually increase in the direction in which the hole 40b is drilled (from the top to the bottom in FIG. 7B). The portion side (front side of FIG. 4 and upper side of FIG. 7B) is set to a minimum of 3 mm, and the thin film 40c side (back side of FIG. 4 and upper side of FIG. 7B) is set to a maximum of 4.3 mm. ing.

  As shown in FIGS. 4 and 6, the second elastic body 42 is within the line of the driven side fiber cord bundle 32 in the direction of the axis O <b> 1 of the elastic joint 1 (from the front side to the back side in FIG. 5). The outer periphery of the cylinder portion 11 of the driving side collar 10 and its rotation direction, except between the second flange portions 12b and 22b and the third flange portions 12c and 22c (see FIG. 8B). The rubber member is disposed between the front side driven collar 20 and the outer periphery of the cylindrical portion 21, and the above-described punched portion 40 b is formed in the center between the driving side collar 10 and the driven side collar 20. ing.

  Moreover, as shown in FIG.4 and FIG.8 (a), rubber | gum thickness L7b (FIG. 8) of the 2nd elastic body 42 arrange | positioned between the punching part 40b and the extension part 32b of the driven side fiber cord bundle 32 is shown. (A) the dimension in the left-right direction) is set so as to gradually increase in the drilling direction of the punched portion 40b (from the top to the bottom in FIG. 8A), and the opening side (the front side in FIG. 4) 7 (a) upper side) is set to a minimum of 3.8 mm, and the thin film 40c side (the back side in FIG. 4, the lower side of FIG. 7 (a)) is set to a maximum of 4.8 mm.

  Furthermore, as shown in FIG.4 and FIG.8 (b), the 2nd arrange | positioned between the punching part 40b and the drive side winding part 31a (driven side winding part 31c) of the drive side fiber cord bundle 31 is carried out. The rubber thickness L8b of the elastic body 42 (dimension in the left-right direction in FIG. 7B) is set so as to gradually increase in the direction in which the hole 40b is drilled (from the top to the bottom in FIG. 7B). The portion side (front side in FIG. 4 and the upper side in FIG. 7B) is set to a minimum of 3.5 mm, and the thin film 40c side (back side in FIG. 4 and the upper side in FIG. 7B) is set to a maximum of 4 mm. ing.

  Therefore, the elastic body 40 provides the rubber thickness L7 (L7a and L7b) between the holed portion 40b and the extended portions 31b and 32b of the fiber cord bundles 31 and 32 by providing the holed portion 40b described above. The thickness is set smaller than the winding thickness L5 of the drive side fiber cord bundle 31 to reduce the thickness. Further, the rubber thickness L8 (L8a and L8b) disposed between the hole punching portion 40b and the winding portions 31a, 32a, 31c, 32c of the fiber cord bundles 31, 32 is changed to the hole punching portion 40b and the extending portion 31b. , 32b is set to be smaller than the rubber thickness L7 (L7a and L7b) to reduce the thickness.

  Therefore, compared with the case where the hole punching part 40b is not provided, the spring constant of the elastic body 40 (the first elastic body 41 or the second elastic body 42) is set to be small, and the hole punching part 40b and the non-flexing part. From the circumferential rubber thickness of the rubber portion disposed on the winding portions 31a, 32a, 31c, and 32c of the fiber cord bundles 31 and 32, the extending portion that is a bent portion of the hole punching portion 40b and the fiber cord bundles 31 and 32 The rubber thickness in the radial direction of the rubber portions arranged at 31b and 32b can be set to be thick.

  As a result, when the rotational torque is transmitted from the drive shaft (not shown) to the driven shaft (not shown) by the drive side fiber cord bundle 31 and the driven side fiber cord bundle 32, the extending portions 31b, 32b and this portion It is possible to make the rubber portion provided along the portion easily elastically deformed. As a result, when a rotational torque is transmitted from a drive shaft (not shown) to a driven shaft (not shown), its elasticity against vibration and torsion (deflection) generated between the drive shaft and the driven shaft. The vibration damping function of the elastic joint 1 can be improved by the deformation. Therefore, the riding comfort can be improved.

  In addition, the first elastic body 41 and the second elastic body 42 are subject to frictional heat due to the rotation of the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32 therein, so that they tend to be hotter than other portions. . On the other hand, the cooling property of the 1st elastic body 41 and the 2nd elastic body 42 can be improved by ensuring the thermal radiation area of the 1st elastic body 41 and the 2nd elastic body 42 by the punching part 40b. .

  Further, when the holed portion 40b is provided, since the rubber thickness L8 is set to be thinner than the rubber thickness L7, it comes into contact with the cylindrical portion 11 of the driving side collar 10 and the cylindrical portion 21 of the driven side collar 20. It is possible to improve the heat dissipation of the portion that easily generates heat (the rubber portion between the punched portion 40b and the winding portions 31a, 32a, 31c, and 32c). Therefore, thermal degradation of the first elastic body 41 and the second elastic body 42 can be prevented, and the durability of the first elastic body 41 and the second elastic body 42 (elastic joint 1) can be improved.

  On the other hand, the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31 or the driving side winding portion 32a (driven side winding portion 32c) of the driven side fiber cord bundle 32 is driven side. It is a non-flexing part of the fiber cord bundle 31 and the driven side fiber cord bundle 32, and when the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32 are bent, a problem that a part thereof is exposed to the outside cannot occur. .

  Therefore, the rubber thickness L8 in the circumferential direction of the first elastic body 41 between the hole punching portion 40b and the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31, or the hole punching portion 40b. And the rubber thickness L8 in the circumferential direction of the second elastic body 42 between the driving side fiber cord bundle 32 and the driving side winding portion 32a (driven side winding portion 32c). Even when the thickness is set smaller than the winding thickness L5 of the cord bundle 32), the drive side fiber cord bundle 31 (driven side fiber cord bundle 32) can be prevented from being exposed to the outside.

  Moreover, in the 1st elastic body 41 and the 2nd elastic body 42, between the hole punching part 40b and the drive side winding part 31a (driven side winding part 31c) of the drive side fiber cord bundle 31, or the hole punching part 40b And the drive side winding portion 32a (driven side winding portion 32c) of the driven side fiber cord bundle 32 are set to be thin, so that an elastic body such as rubber or resin is poured into the mold to form the elastic joint 1. When forming, between the hole punching part 40b and the driving side winding part 31a (driven side winding part 31c) of the driving side fiber cord bundle 31, or the driving side of the hole punching part 40b and the driven side fiber cord bundle 32 There is a possibility that an elastic body such as rubber or resin may not flow uniformly between the winding portion 32a (driven side winding portion 32c), and the inner peripheral side of the driving side fiber cord bundle 31 (driven side fiber cord bundle 32) Elastic bodies such as rubber, resin, etc. are evenly distributed throughout It is necessary to improve the fluidity.

  On the other hand, the portion of the first elastic body 41 between the hole punching portion 40b and the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31, or the hole punching portion 40b and the driven portion. The portion of the second elastic body 42 between the side fiber cord bundle 32 and the driving side winding portion 32a (driven side winding portion 32c) is a semicircle of the driving side fiber cord bundle 31 (driven side fiber cord bundle 32). Since it follows the winding portions 31a, 32a, 31c, and 32c configured in a shape, the circumferential width is gradually increased toward the center side and the outside in the radial direction.

  Therefore, the rubber thickness L8 in the circumferential direction of the first elastic body 41 between the hole punching portion 40b and the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31, or the hole punching portion 40b. The rubber thickness L8 in the circumferential direction of the second elastic body 42 between the drive side fiber cord bundle 32 and the drive side winding portion 32a (driven side winding portion 32c) of the driven side fiber cord bundle 32 is the drive side fiber cord bundle 31 (driven side fiber). Even if it is set to be smaller than the winding thickness L5 of the cord bundle 32), an elastic body such as rubber or resin is used as the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31, or The driven side fiber cord bundle 32 may be guided to the driving side winding portion 32a (driven side winding portion 32c) to flow uniformly to the inner peripheral side of the driving side fiber cord bundle 31 (driven side fiber cord bundle 32). it can. Therefore, production errors can be prevented from occurring in the elastic body 40 of the elastic joint 1, and the balance of the elastic joint 1 as a rotating body can be made uniform.

  As shown in FIGS. 5 to 8, the third elastic body 43 is a rubber member disposed on the inner circumferences of the first elastic body 41 and the second elastic body 42 and viewed from the direction of the axis O <b> 1 of the elastic joint 1. It is formed in an octagonal ring shape.

  The rubber thickness L9 of the third elastic body 43 (the dimensions in the left-right direction in FIGS. 7A and 8A) is set to the same width of 6 mm in the circumferential direction along the inner edge of the through hole 40a. And extending in the direction in which the hole 40b is formed (the vertical direction in FIGS. 7A and 8A).

  That is, as shown in FIGS. 4, 5, and 6, the portion provided along the extending portion 31 b of the drive side fiber cord bundle 31 of the third elastic body 43 has a substantially same rubber thickness L <b> 9 in the circumferential direction. It is extended to. Further, the portion provided along the extended portion 32b of the driven side fiber cord bundle 32 of the third elastic body 43 is also extended in the circumferential direction with substantially the same rubber thickness L9.

  Therefore, the shake of the shaft center O1 of the elastic joint 1 can be reduced, and the rotational torque transmission performance of the elastic joint 1 can be stabilized. Accordingly, when the rotational torque is transmitted from the drive shaft (not shown) to the driven shaft (not shown), the output can be improved.

  Further, since the rubber thickness L9 of the third elastic body 43 is set to be the same as the winding thickness L5 (5 mm) of the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32, it is set smaller than the winding thickness L5. Compared to the case, the third elastic body 43 can be easily elastically deformed. Therefore, when the rotational torque is transmitted from the drive shaft (not shown) to the driven shaft (not shown), the elasticity against vibration and torsion (deflection) generated between the drive shaft and the driven shaft. Since the vibration damping function of the elastic joint 1 can be improved by the deformation, the ride comfort can be improved.

  As shown in FIGS. 4 to 6, the fourth elastic body 44 circumscribes the elastic body circumscribed circle m <b> 1 as viewed from the direction of the axis O <b> 1 of the elastic joint 1 and the outer circumferences of the first elastic body 41 and the second elastic body 42. The rubber member is formed in an octagonal ring shape that is slightly larger than the third elastic body as viewed from the direction of the axis O1 of the elastic joint 1 (viewed from the front of the drawing in FIGS. 5 and 6). Yes.

  As shown in FIG. 4, the rubber thickness L10 of the fourth elastic body 44 is set so as to increase or decrease along the virtual elastic body circumscribed circle m1, and the drilling direction of the hole punching portion 40b (FIG. 6B). ) And FIG. 7 (b) in the vertical direction).

  That is, the rubber thickness L10 of the fourth elastic body 44 is set to a maximum of 5 mm at the center of the extending portion 31b of the driving side fiber cord bundle 31 or the center of the extending portion 32b of the driven side fiber cord bundle 32. It is set so as to gradually decrease as it approaches the driving side winding portion 31a (driven side winding portion 31c) of the fiber cord bundle 31 or the driving side winding portion 32a (driven side winding portion 32c) of the driven side fiber cord bundle 32. ing. The rubber thickness L10 of the fourth elastic body 44 is such that the winding start (end) portion of the driving side winding portion 31a of the driving side fiber cord bundle 31 and the driving side winding portion 32a of the driven side fiber cord bundle 32 and The minimum winding length is set to 2 mm at the winding start (end) portion of the driven side winding portion 31c of the driving side fiber cord bundle 31 and the driven side winding portion 32c of the driven side fiber cord bundle 32.

  Accordingly, the fourth elastic body 44 is configured such that the extending portion 31b and the extending portion 32b that are the bent portions of the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32 are set to be thick, and the driving side is the non-flexing portion. The winding part 31a and the driven side winding part 31c are set to be thin. As a result, the fourth elastic body 44 improves the vibration damping function of the elastic joint 1 by providing the thick portion while reducing the weight by providing the thin portion, and also the driving side fiber cord bundle 31 and the driven side. It is possible to reliably prevent the fiber cord bundle 32 from being exposed.

  The rubber thickness L10 of the fourth elastic body 44 is set to be larger than the difference between the winding portion separation distance L3 and the extended portion separation distance L4. That is, the difference between the winding portion separation distance L3 and the extension portion separation distance L4 is set to a value smaller than the maximum portion of the rubber thickness L10 of the fourth elastic body 44.

  Specifically, the difference between L3 and L4 is 4.5 mm, and the maximum portion of the rubber thickness L10 of the fourth elastic body 44 is set to 5 mm. Therefore, the rubber thickness L10 of the fourth elastic body 44 is determined by the difference between L3 and L4, which is the distance between the extending portion 31b of the drive side fiber cord bundle 31 and the outer center (axial center O1) of the cord circumscribed circle m2. It is set large.

  Therefore, compared with the case where the rubber thickness L10 of the fourth elastic body 44 is set to be smaller than the difference between L3 and L4, the meat stealing portion 50 described later can be set smaller, and the outer shape line of the elastic joint 1 is connected to the elastic body circumscribing. It can be close to the circle m1.

  Even in this case, since the meat stealing portion 50 is provided between the elastic body 40 and the elastic body circumscribed circle m1, the elastic body 40 (elastic joint 1) is formed in a perfect circle shape. As compared with the above, the weight of the elastic body 40 (elastic joint 1) can be reduced.

  Therefore, when the elastic joint 1 rotates, the vibration of the axis O1 of the elastic joint 1 can be reduced, so that vibrations generated when rotational torque is transmitted from the drive shaft to the driven shaft (both not shown). Etc. can be suppressed, and the transmission performance of the rotational torque of the elastic joint 1 can be stabilized. Therefore, it is possible to improve the output when the rotational torque is transmitted from the drive shaft to the driven shaft.

  Further, the radius of the cord circumscribing circle, that is, the winding portion separation distance L3 from the axis O1 of the elastic joint 1 to the outer edge of the driving side winding portion 31a (driven side winding portion 31c), and the outer center of the cord circumscribing circle m2 The difference from the shortest distance L4 from O1 to the extending portions 31b and 32b on the side of the meat stealing portion 50 is set to be smaller than the rubber thickness L10 of the fourth elastic body 44. Therefore, from the outer center O1 of the cord circumscribing circle m2 Compared with the case where the difference from the shortest distance L4 to the extending portions 31b and 32b on the meat stealing portion 50 side is set larger than the rubber thickness L10, the axis O2 of the driving side collar 10 and the axis of the driven side collar 20 The separation distance L1 (see FIG. 1) between the center O3 is set small.

  Therefore, when the same torque is applied, the extension of the drive side fiber cord bundle 31 and the driven side fiber cord bundle 32 can be suppressed, and the high output can be increased in the drive side fiber cord bundle 31 and the driven side fiber cord bundle 32. Even when it is loaded, the driving side fiber cord bundle 31 and the driven side fiber cord bundle 32 can be prevented from being broken. Therefore, the durability of the elastic joint 1 can be improved.

  Further, the rubber thickness L10 of the fourth elastic body 44 is set to be thinner than the rubber thickness L9 of the third elastic body 43. The fourth elastic body 44 is disposed on the side of the meat stealing portion 50 of the elastic joint 1, and the third elastic body 43 is disposed on the axis O <b> 1 side of the elastic joint 1. Therefore, the rubber thickness L10 on the meat stealing portion 50 side is thinner than the rubber thickness L9 on the axial center O1 side of the elastic joint 1. Therefore, compared with the case where the rubber thickness L10 of the fourth elastic body 44 is set to be thicker than the rubber thickness L9 of the third elastic body 43, the heat dissipation of the fourth elastic body 44 can be improved. Deterioration of the first elastic body 40 and the second elastic body 42 can also be suppressed, and the durability of the elastic joint 1 can be improved.

  The rubber thickness L10 of the maximum portion of the fourth elastic body 44 is set to be greater than the rubber thickness L7 of the portion disposed between the punched portion 40b and the extending portion 31b (extending portion 32b). Therefore, when the extended portions 31b and 32b of the fiber cord bundles 31 and 32 are bent outward in the direction of the axis O1 of the elastic joint 1, the extended portions 31b and the extended portions 32b are exposed to the outside. It can be surely prevented. In addition, by setting the portion disposed between the punched portion 40b and the extended portion 31b (extended portion 32b) to be thin, the punched portion 40b of the first elastic body 41 and the second elastic body 42 Since it can expand in the radial direction, the first elastic body 41 and the second elastic body 42 can be set to be easily elastically deformed.

  As shown in FIGS. 4 to 6, the meat stealing portion 50 is a gap set in a dish shape between the outer periphery of the fourth elastic body 44 and the elastic body circumscribed circle m1, and is elastic by the punched portion 40b. In addition to reducing the weight of the body 40 (elastic joint 1), the meat stealing portion 50 can also reduce the weight of the elastic body 40 (elastic joint 1). Further, the meat stealer 50 forms the outer shape of the elastic body 40 (elastic joint 1) in an octagonal shape. Therefore, the thickness of the rubber provided along the extended portions 31b and 32b of the fourth elastic body 44 is made uniform.

  Further, as shown in FIG. 4, the width L11 in the radial direction of the meat stealing portion 50 is set to a maximum of 1.8 mm at the center of the extended portions 31b and 32b (on the radial extension line of the punched portion 40b). Yes. Therefore, the radial width L11 of the meat stealing portion 50 is set to be smaller than the opening width L6 of the punched portion 40b.

  Accordingly, when the elastic body 40 (elastic joint 1) is reduced in weight by the hole punching portion 40b and the meat stealing portion 50, the radial width L11 of the meat stealing portion 50 is set smaller than the winding thickness L5. Since it is set to be smaller than the opening width L6 of the punched portion 40b, the elastic body 40 (elastic joint 1) can be made close to a perfect circle. As a result, the meat stealing portion 50 can be set to a size that does not cause the shaft center O1 of the elastic joint 1 to shake, and the torque transmission performance of the elastic joint 1 can be achieved while reducing the weight of the elastic body 40 (elastic joint 1). Can be improved.

  As shown in FIG. 4, the width L11 in the radial direction of the meat stealing portion 50 is disposed between the punched portion 40b and the winding portions 31a, 32a, 31c, and 32c of the fiber cord bundles 31 and 32. It is set smaller than the rubber thickness L8. Therefore, the outer shape of the elastic body 40 (elastic joint 1) can be made closer to a perfect circle. Therefore, the torque transmission performance of the elastic body 40 (elastic joint 1) can be improved while further reducing the weight of the elastic body 40 (elastic joint 1).

  Further, the rubber thickness L8 in the circumferential direction of the first elastic body 41 between the hole punching portion 40b and the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31, or the hole punching portion 40b. The rubber thickness L8 in the circumferential direction of the second elastic body 42 between the first elastic body 41 and the second elastic body is between the driving side winding portion 32a of the driven side fiber cord bundle 32 (driven side winding portion 32c). 42 is set to be the thinnest, and the width L11 in the radial direction of the meat stealing portion 50 is set to be smaller than the rubber thickness L8, so that the meat stealing portion 50 can be prevented from becoming excessively large. Therefore, even when the weight of the elastic body 40 is reduced by the hole punching portion 40b and the meat stealing portion 50, the elastic body 40 can be made close to a perfect circle.

  As a result, the meat stealing portion 50 can be set to a size that does not cause the shaft center of the elastic joint 1 to be shaken, and the torque transmission performance of the elastic joint 1 can be improved while reducing the weight of the elastic body 40. .

  Moreover, since the radial width L11 of the meat stealing portion 50 is set smaller than the rubber thickness L8 of the thinnest portion of the first elastic body 41 or the second elastic body 42, the radius of the meat stealing portion 50 is set. Compared to the case where the width L11 in the direction is set to be larger than the rubber thickness L8, a large surface area in the circumferential direction of the elastic body 40 (fourth elastic body 44) can be secured, and the cooling performance of the elastic body 40 is improved. Can be improved.

  Furthermore, since the opening width L6 of the punched portion 40b is set smaller than the winding thickness L5 of the fiber cord bundles 31, 32, the opening width L6 of the punched portion 40b is set as compared with the case where the opening width L6 is set larger than the winding thickness L5. The volume of the space portion can be reduced. Therefore, the rubber amount of the first elastic body 41 and the second elastic body 42 arranged inside the fiber cord bundles 31 and 32 can be secured, and the driving side collar 10 (driving shaft) to the driven side collar 20 (driven). When power (torque) is transmitted to the shaft, the steering stability can be improved.

  In addition, since the opening width L6 of the hole punching portion 40b is set larger than the radial width L11 of the meat stealing portion 50, the drive side that becomes hot at a portion closer to the axis O1 than the meat stealing portion 50 side of the elastic joint 1 The heat dissipation of the first elastic body 41 and the second elastic body 42 arranged on the inner peripheral side of the fiber cord bundle 31 and the driven side fiber cord bundle 32 can be improved and the weight can be reduced.

  In addition, the width L11 in the radial direction of the meat stealing portion 50 is set so that the driving side winding portion 31a (driven side winding portion 31c) of the driving side fiber cord bundle 31 or the driving side winding portion 32a of the driven side fiber cord bundle 32 ( It is set to disappear while gradually decreasing as it approaches the driven side winding portion 32c). Therefore, it is possible to prevent the step portion from being formed on the outer peripheral surface of the fourth elastic body 44, and the flow of traveling wind flowing in the circumferential direction of the outer peripheral surface of the fourth elastic body 44 can be made smooth.

  Further, since the radial width L11 of the meat stealing portion 50 is set to be smaller than the rubber thickness L8 of the first elastic body 41 and the second elastic body 42, the meat stealing portion 50 is minimized. The outer periphery of 1) can be made close to a perfect circle. Therefore, the flow of the traveling wind flowing in the circumferential direction of the outer peripheral surface of the fourth elastic body 44 can be made smoother, and the cooling performance of the elastic body 40 (elastic joint 1) by the traveling wind can be further improved. .

  Four driving side collars 10 and four driving side collars 10 are arranged, and the separation distance between the axial center O2 of the adjacent driving side collar 10 and the axial center O3 of the driving side collar 10 is equal. Since it is set, four locations connected to the drive shaft and the driven shaft (both not shown) can be provided at equal intervals. Accordingly, when the driving side collar 10 and the driven side collar 20 are loaded with torque from the driving shaft or the driven shaft, the driving side fiber cord bundle 31 or the driven side fiber cord that is the vibration absorbing portion is provided at four places, upper, lower, left and right. Since the bundle 32 and the rubber portion arranged around the bundle 32 can be arranged, the drive-side fiber cord bundle 31 can be used regardless of the direction in which vibration and twist (bend) occur between the drive shaft and the driven shaft. And the driven side fiber cord bundle 32 and the elastic body 40 can be elastically deformed, and the vibration damping function of the elastic joint 1 can be improved.

  Next, referring to FIG. 9 to FIG. 12, a yarn winding device 100 used when the fiber cord 101 forming the fiber cord bundle 30 (see FIG. 10) is wound around the driving side collar 10 and the driven side collar 20. explain.

  9 is a schematic front view of the yarn winding device 100, FIG. 10 is a partial side view of the yarn winding device 100 viewed from the direction of the arrow A3 in FIG. 9, and FIG. 11 is a XI portion in FIG. FIG. 12 is a partially enlarged front view of the yarn winding device 100, and FIG. 12 is a partially enlarged front view of the yarn winding device 100 in the XII portion of FIG.

  As shown in FIG. 9, the yarn winding device 100 includes fiber cords 101 on the driving side collar 10 and the driven side collar 20 that are adjacent to each other in the direction orthogonal to the axial centers O2 and O3 of the driving side collar 10 and the driven side collar 20. An apparatus frame 110A, and a drive-side collar 10 and a driven-side collar 20 installed adjacent to the apparatus frame 110A in a vertical position (the axial centers O2 and O3 are vertically aligned (the vertical direction in FIG. 9)) Next, the table 129 and the support portion 102 provided below the apparatus frame 110A (lower side in FIG. 9) are in the horizontal position (the axis O11 is aligned in the front-rear direction (front side to rear side in FIG. 9)). The bobbin 103 around which the fiber cord 101 is wound so as to be rotatably supported in (1) and the bobbin 103 is rotated around the axis O5 to move the fiber cord 101 upward (upper side in FIG. 9). An electric motor M (see FIG. 10) that feeds out, a holding unit 104 (see FIG. 12) that holds the tip 101A (see FIG. 12) of the fiber cord 101 that is fed out from the bobbin 103, and a holding unit 104 and a bobbin 103. A tension adjusting unit 105 that adjusts the tension of the fiber cord 101 therebetween, a nozzle 106 that allows the fiber cord 101 to be inserted on the upper side in the feeding direction of the fiber cord 101 with respect to the holding unit 104, and the nozzle 106 are provided adjacent to each other by the electric motor M. A cord winding mechanism 107 that rotates around the pair of driving side collars 10 and driven side collars 20, tension detecting means 108 that detects the tension of the fiber cord 101, and an electric motor based on the detection result of the tension detecting means 108 A control device 109 (see FIG. 11) for controlling M is provided.

  With such a yarn winding device 100, the fiber cord 101 is unwound from the bobbin 103 toward the upper tension adjustment unit 105 (upper side in FIG. 9), and is stretched in the horizontal direction (left and right direction in FIG. 9) by the tension adjustment unit 105. The feeding path of the fiber cord 101 is set so as to be inserted from the upper tension adjusting unit 105 into a nozzle 106 described later of the cord winding mechanism 107.

  As shown in FIGS. 9 and 10, the bobbin 103 includes a hollow rotating drum 111 and a bobbin side flange 112 projecting outward from the both ends of the rotating drum 111 in the radial direction (vertical direction in FIG. 10). The fiber cord 101 is wound around the drum 111 and the fiber cord 101 is divided by a bobbin side flange 112.

  Further, a first shaft portion 113 protruding from one end of the rotating drum 111 in the axial direction (left-right direction in FIG. 10) is supported by the support portion 102 via the bearing B. The support 102 is fixed to a base frame 110B installed below the apparatus frame 110A. A second shaft portion 114 protruding from the other axial end of the rotating drum 111 is connected to the electric motor M.

  Then, when the tension of the fiber cord 101 reaches a set value based on the detection result of the tension detecting means 108, the control device 109 rotates the electric motor M. As a result, the fiber cord 101 is fed out from the bobbin 103. Further, when the tension of the fiber cord 101 becomes smaller than the set value, the control device 109 stops the rotation of the electric motor M. Thereby, the feeding of the fiber cord 101 from the bobbin 103 is stopped.

  Further, a column 110C is erected on the apparatus frame 110A, and a pair of upper and lower guide rings 150 for guiding the fiber cord 101 between the bobbin 103 and a first tension roller 121 described later are provided on the column 110C. Is provided.

  The pair of upper and lower guide rings 150 is supported by the apparatus frame 110A via the support 110C, and is vertically between the center G1 of the lower (FIG. 9 and FIG. 10 lower) guide ring 150 and the axis T of the bobbin 103. The length N1 in the direction (vertical direction in FIGS. 9 and 10) is set to 3 times or more (5 times in this embodiment) the maximum value of the roll diameter R of the fiber cord bundle 30 wound around the bobbin 103. ing.

  Further, the length N1 is at least twice the maximum value of the winding length N2 of the roll-shaped fiber cord bundle 30 (the length in the direction corresponding to the axial direction of the bobbin 103, the length in the left-right direction in FIG. 10) ( In this embodiment, the pair of upper and lower guide rings 150 is vertically above the axial center T of the bobbin 103 (the horizontal direction in FIG. 10) and the radial direction (the vertical direction in FIG. 10). 9 and 10 in FIG. Therefore, a first tension roller 121, which will be described later, is disposed above the pair of upper and lower guide rings 150, and the fiber cord 101 between the first tension roller 121 and the lower guide ring 150 can be set to a vertical posture. A one-tension roller 121 is disposed.

  Of the pair of upper and lower guide rings 150, the upper guide ring 150 is arranged at the approximate center between a second auxiliary roller 152 (to be described later) and the rotating shaft 124 of the robot 123 in the vertical direction (the vertical direction in FIG. 9). The guide ring 150 is disposed at a position that overlaps the rotation shaft 124 of the robot 123 in the vertical direction. That is, the pair of upper and lower guide rings 150 are disposed closer to the first tension roller 121 than the bobbin 103.

  Therefore, the distance from the bobbin 103 to the lower guide ring 150 is set to be longer than the distance from the first tension roller 121 to the upper guide ring 150 (lower guide ring 150). It is possible to prevent a change in the tension of the fiber cord 101 that is fed out from becoming large, and to suppress the occurrence of disturbance in the state in which the fiber cord 101 is wound.

  As shown in FIGS. 9 and 11, the tension adjusting unit 105 includes a first tension roller 121, a second tension roller 122 disposed below the first tension roller 121 (downward in FIG. 9), and a first tension roller. A first swing arm 131 that swingably supports 121 with respect to the apparatus frame 110A, a second swing arm 132 that swingably supports the second tension roller 122 with respect to the apparatus frame 110A, and a first A first coil spring 141 that swings and biases the first swing arm 131 to one side of the swing direction about the swing axis Y1 (arrow A1 side in FIG. 9), and a second swing shaft Y2 as the center. A second coil spring 142 that swings and biases the second swing arm 132 to one side (arrow A2 side in FIG. 9) of the rotating direction, and winding of the fiber cord 101 around the first tension roller 121 Only the first auxiliary roller 151 for the corners to increase, and is configured and a second auxiliary roller 152 to increase the wrapping angle of the fiber cord 101 to a second tension roller 122.

  A first auxiliary roller 151 is disposed on the lower side of the first tension roller 121 (lower side of the fiber cord 101 in the feeding direction) in the feeding direction of the fiber cord 101 (the arrow H direction in FIG. 9). The second auxiliary roller 152 is arranged on the upper side of the second tension roller 122 (upward side in the feeding direction of the fiber cord 101) in the direction of arrow 9 (H direction). The first auxiliary roller 151 is supported by the apparatus frame 110A via the first support arm 161, and the second auxiliary roller 152 is supported by the apparatus frame 110A via the second support arm 162.

  As shown in FIG. 11, the tension detecting means 108 includes a limit switch 116 that is turned on / off by the base end portion of the first swing arm 131, and a swing piece 117 that is a spring plate that turns the limit switch 116 on and off. When the swing piece 117 presses the proximal end portion of the first swing arm 131, the limit switch 116 is turned on. When the limit switch 116 is turned on, the bobbin 103 (see FIG. 9) is fed out and rotated by the electric motor M. Further, when the pressing of the proximal end portion of the first swing arm 131 against the swing piece 117 is released, the limit switch 116 is turned off and the bobbin 103 is driven to be driven to rotate out by the electric motor M.

  Therefore, as shown in FIG. 9, the tension adjusting unit 105 includes the first tension roller 121 and the second tension roller 122 positioned on the lower side (left side in FIG. 9) of the fiber cord 101 than the first tension roller 121. The first tension roller 121 is positioned above the bobbin 103 (upper side in FIG. 9), and the second tension roller 122 is positioned above the nozzle 106 (upper side in FIG. 9), which will be described later. Responsiveness of the first tension roller 121 and the second tension roller 122 with respect to the change of the above can be improved.

  That is, the second tension roller 122 located above the nozzle 106 (upper side in FIG. 8) can cope with a change in tensile force applied to the tip portion (winding portion) of the fiber cord 101 by the nozzle 106 described later, The first tension roller 121 above the bobbin 103 can cope with a change in tensile force applied to the rear end portion (feeding portion) of the bobbin 103 by the bobbin 103. Therefore, it is possible to respond flexibly to changes in tension as compared with the case where both tension forces are handled by a single tension roller. As a result, vibration of each part of the yarn winding device 100 can be suppressed.

  Further, since the first auxiliary roller 151 is located below the first tension roller 121 (lower side in FIG. 9) and the second auxiliary roller 152 is located below the second tension roller 122 (lower side in FIG. 9), the first auxiliary roller 151 is located. The winding angle of the fiber cord 101 around the first tension roller 121 can be increased by the roller 151, and the winding angle of the second tension roller 122 around the fiber cord 101 can be increased by the second auxiliary roller 152. Can do. Therefore, the first tension roller 121 and the second tension roller 122 can be rotated and applied with tension smoothly and reliably. Therefore, the winding operation of the fiber cord 101 can be performed more reliably.

  Further, the second auxiliary roller 152 is disposed at a position slightly lower than the first auxiliary roller 151, but is disposed at a position overlapping the first auxiliary roller 151 in the vertical direction (vertical direction in FIG. 9), and the first auxiliary roller 151. The second tension roller 122 is disposed between the first tension roller 121 and the first tension roller 121.

  That is, the second tension roller 122 is disposed on the lower side (left side in FIG. 9) in the feeding direction of the fiber cord 101 than the second auxiliary roller 152. Therefore, in order to rotate the nozzle 106 at a predetermined speed, the nozzle 106 is compared with the separation distance between the bobbin 103 and the first tension roller 121 so that the tension of the fiber cord 101 fed out from the nozzle 106 does not become too small. The distance between the second tension roller 122 and the second tension roller 122 is set small. Therefore, the fiber cord 101 can be smoothly drawn out from the nozzle 106 and wound around the adjacent driving side collar 10 and driven side collar 20.

  On the other hand, the first tension roller 121 is disposed on the lower side (the right side in FIG. 9) of the fiber cord 101 in the feeding direction than the first auxiliary roller 151. Therefore, the bobbin 103 and the first tension roller are smaller than the separation distance between the nozzle 106 and the second tension roller 122 so that the tension of the fiber cord 101 between the bobbin 103 and the first tension roller 121 does not become too large. Since the separation distance from 121 is set large, the fiber cord 101 can be smoothly fed out from the bobbin 103.

  Further, the first oscillating arm 131 is oscillated and urged by the first coil spring to apply tension to the fiber cord 101, and the second oscillating arm 132 is oscillated and urged by the second coil spring. Since tension is applied to the tension adjusting unit 105, the tension adjusting unit 105 can be configured simply. In addition, since the tension detecting means 108 is a limit switch 116 that is turned on and off by the first swing arm 131, the structure of the tension detecting means 108 can be determined while being capable of accurately detecting the tension of the fiber cord 101. It can be simplified.

  As shown in FIG. 12, the holding portion 104 includes a pair of holding members 115 that hold the tip 101 </ b> A of the fiber cord 101, and the pair of holding members 115 are held and released by a fluid pressure cylinder. Actuated. The pair of clamping members 115 may be configured to be operated so as to be clamped and released by a driving mechanism other than the fluid pressure cylinder.

  The cord winding mechanism 107 has a nozzle 106 for inserting the fiber cord 101 on the upper side (the upper side in FIG. 12) of the fiber cord 101 with respect to the holding portion 104, and a three-dimensional direction (vertical, horizontal, vertical) A robot 123 movable in the front-rear direction) and a connecting member 126 that connects the robot 123 and the nozzle 106 are provided.

  As shown in FIG. 12, the nozzle 106 is formed in the shape of an elongated cylindrical hollow pipe along the vertical direction (vertical direction in FIG. 12), and the nozzle 106 is centered on an axis O5 (see FIG. 13) described later. The fiber cord 101 is wound around the driving side collar 10 and the driven side collar 20 (see FIG. 9) while moving on the circumference of the perfect circle (circular movement along the rotation locus C) (see FIG. 13).

  As shown in FIG. 12, the robot 123 includes a rotary shaft 124 that rotates around an axis O4 in the head 125.

  A first cord through hole 181 concentric with the axis O4 is formed through the rotary shaft 124 in the center in the radial direction (left and right direction in FIG. 12). Further, the nozzle 106 is connected to the outer peripheral portion of the rotating shaft 124 via the connecting member 126 in a state where the nozzle 106 is positioned away from the axis O4 in the radial direction of the rotating shaft 124 (left and right direction in FIG. 12). Is moved in a three-dimensional direction by a plurality of fluid cylinders (not shown), and its rotating shaft 124 is rotationally driven by an electric motor (not shown) for the rotating shaft.

  As shown in FIG. 12, the connecting member 126 is a member formed in an L shape when viewed from the front (viewed from the front side of FIG. 11), and a piece 126 </ b> A of the connecting member 126 is formed at the lower end of the rotating shaft 124. The upper end 126J is fixed. A second cord through hole 182 having a long hole is formed in one piece 126A of the connecting member 126 in the vertical direction (vertical direction in FIG. 12) in the thickness direction (left and right direction in FIG. 12), and the upper end of the one piece 126A of the connecting member 126 is formed. A first guide roller 171 is provided in the portion 126J, and the fiber cord 101 inserted through the first cord through hole 181 from above (upper side in FIG. 12) is guided to the second cord through hole 182 by the guide roller 171.

  Further, the second guide roller 172 that guides the fiber cord 101 inserted through the second cord through hole 182 to the hollow portion 106A of the nozzle 106 is bent vertically from the lower end (lower end in FIG. 12) of the one piece 126A of the connecting member 126. 126B. The first guide roller 171 is rotatably supported by a first roller bracket 173 fixed to one piece 126A of the connecting member 126, and the second guide roller 172 is fixed to the upper surface of the other piece 126B of the connecting member 126. A two-roller bracket 174 is rotatably supported.

  As shown in FIG. 12, the fiber cord 101 from the first cord through hole 181 of the rotating shaft 124 to the nozzle 106 is viewed from the penetrating direction of the second cord through hole 182 (viewed from the left or right direction in FIG. 12). ) The first cord through hole 181, the first guide roller 171, the second cord through hole 182, the second guide roller 172, and the nozzle 106 are arranged so as to be in a straight line.

  As described above, the first tension roller 121 is disposed so that the fiber cord 101 between the first tension roller 121 and the lower guide ring 150 can be set in a vertical posture. Moreover, the length N1 in the vertical direction (the vertical direction in FIGS. 9 and 10) between the center G1 of the lower guide ring 150 and the axis T of the bobbin 103 is wound around the bobbin 103. Further, the maximum value of the roll diameter R of the fiber cord bundle 30 is set to 3 times or more (5 times in this embodiment). Therefore, the fiber cord 101 can be wound around the drive side collar 10 and the driven side collar 20 so that no disturbance occurs between the fiber cords 101 for the adjacent drive side collar 10 and the driven side collar 20.

  That is, when the lower end of the fiber cord 101 between the guide ring 150 and the bobbin 103 is located at one end (right end in FIG. 10) or the other end (left end in FIG. 10) of the bobbin 103, the vertical direction The inclination angle θ1 of the fiber cord 101 with respect to (vertical direction in FIG. 10) (the inclination angle θ2 of the fiber cord 101 when viewed from the outside in the radial direction of the bobbin 103 (front side or back side in FIG. 10)) can be reduced. In addition, the inclination angle θ2 of the fiber cord 101 with respect to the vertical direction (the vertical direction in FIG. 9) (inclination angle θ2 of the fiber cord 101 when viewed from the outside in the axial direction of the bobbin 103 (front side or front side in FIG. 9)) is also small. can do.

  As a result, when the lower end of the fiber cord 101 is positioned at one end (right end in FIG. 10) or the other end (left end in FIG. 10) of the bobbin 103, the fiber cord 101 is separated from the guide ring 150 or the bobbin 103. The resistance received can be reduced. When the lower end of the fiber cord 101 is located in the center of the bobbin 103 in the axial direction (left and right phrases in FIG. 10), the resistance is reduced, so that the change in the tension of the fiber cord 101 can be reduced. Therefore, it can suppress that each part of the yarn winding device 100 vibrates, and the driving side collar 10 and the driven body are prevented so that no disturbance occurs between the fiber cords 101 with respect to the adjacent driving side collar 10 and the driven side collar 20. The fiber cord 101 can be wound around the side collar 20.

  Here, a process of winding the fiber cord 101 around the driving side collar 10 and the driven side collar 20 using the yarn winding device 100 will be described with reference to FIGS. 9 to 12.

  First, as shown in FIG. 9, the driving side collar 10 and the driven side collar 20 are arranged in a vertically placed state on a support 120 formed in a disk shape, and an axial center O2 (both not shown) with a shaft O2 (both not shown). The support tool 120 is supported by the table 129 by being clamped and fixed in the O3) direction (vertical direction in FIG. 9). Eight collars 10 and 20 are fixed to the support 120.

  Next, as shown in FIGS. 10 to 12, the fiber cord 101 fed from the bobbin 103 is guided by a pair of guide rings 150, and includes a first tension roller 121, a first auxiliary roller 151, and a second auxiliary roller. Wrapped around the roller 152 and the second tension roller 122, inserted through the first cord through hole 181 of the rotating shaft 124, the second cord through hole 182 of the connecting member 126, and the hollow portion 160A of the nozzle 106, In a state where the tip 101A of the fiber cord 101 is clamped between a pair of clamping members 115 (see FIG. 12), the axis O4 of the rotating shaft 124 is the axis O2 of the driving side collar 10 and the axis O3 of the driven side collar 20. The robot 123 is moved three-dimensionally so as to coincide with the axial center O5 (see FIG. 13) set at the intermediate position in the plan view (viewed from the front side of FIG. 9).

  When the axis O4 of the rotating shaft 124 coincides with the axis O5 (see FIG. 13) set at the intermediate position between the axis O2 of the driving side collar 10 and the axis O of the driven side collar 20, the rotating shaft 124 is used. The motor (not shown) is driven to rotate, and the rotating shaft 124 moves in a perfect circle around the axis O4 (axis O5) (see FIG. 12). The driving collar 10 and the driven collar 20 are adjacent to each other. Wrap the cord 101. At this time, based on the detection result of the limit switch 116, the control device 109 (see FIG. 9) drives the electric motor M (see FIG. 9), and the bobbin 103 is fed out and rotated by the electric motor M.

  When the winding of the fiber cord 101 is completed, the rotating shaft motor (not shown) is stopped. Then, the yarn portion between the winding end portion of the fiber cord 101 and the tip portion (lower end portion) of the nozzle 106 is cut by a cutting blade (not shown) provided on the head 125 of the robot 123.

  Such an operation is repeated for the other driving side collar 10 and the driven side collar 20 supported by the table 129. When the winding of the fiber cord 101 is completed on the eight collars 10 and 20 in this way, the eight collars 10 and 20 around which the fiber cord 101 is wound are taken out from the yarn winding device 100 together with the support 120. The eight collars 10 and 20 are set together with the support 120 in a mold (not shown), and an elastic member is injected and vulcanized.

  Finally, using FIG. 13, when the nozzle 106 winds the fiber cord 101 around the driving side collar 10 and the driven side collar 20 of the elastic joint 1 (see FIG. 1), the speed of the nozzle 106 and the feeding of the fiber cord 101. The relationship with the quantity will be described. FIG. 13 is a schematic plan view of the driving side collar 10 and the driven side collar 20 showing the trajectory of the fiber cord 101. The driving side collar 10 and the driven side collar 20 are enlarged, and the driving side collar 10 and the driven side collar 20 are enlarged. A state in which the fiber cord 101 is wound around the collar 20 by the nozzle 106 is shown.

  FIG. 13 shows the speed V of the nozzle 106 on the rotation locus C at each time point when the fiber cord 101 is wound around the driving side collar 10 and the driven side collar 20, and the driving side collar 10 and the driven side collar at each time point. 20 shows the velocity V1 of the nozzle 106 in the tangential direction (the feeding length of the fiber cord 101 that the nozzle 106 feeds out). It should be noted that the nozzle 106 that moves (circularly moves) on a perfect circle around the axis O5 set at an intermediate position between the axis O2 of the driving side collar 10 and the axis O3 of the driven side collar 20 is provided. The rotation locus is indicated by a solid line C, and the rotation locus of the nozzle 106 that moves (ellipse motion) on the circumference of an ellipse around the axis O5 is indicated by a broken line D.

  As shown in FIG. 13, when the fiber cord 101 is wound around the driving side collar 10 and the driven side collar 20 of the elastic joint 1 (see FIG. 1), the nozzle 106 rotates at a constant rotational speed. The speed V of the nozzle 106 at each time point on C is constant, but the speed V1 of the nozzle 106 in the tangential direction of the driving side collar 10 and the driven side collar 20 at each time point varies greatly. This V1 corresponds to the feeding amount (feeding length) of the fiber cord 101. When V1 is large, the feeding amount (feeding length) of the fiber cord 101 is large, and when V1 is small, the feeding amount (feeding length) of the fiber cord 101 is large. S) becomes smaller.

  Therefore, when the nozzle 106 moves away from the driving side collar 10 and the driven side collar 20 in the circular locus of the nozzle 106, the feeding amount of the fiber cord 101 increases, and the nozzle 106 approaches the driving side collar 10 and the driven side collar 20. Sometimes the feeding amount (feeding length) of the fiber cord 101 decreases. That is, during the winding of the fiber cord 101, the tension of the fiber cord 101 constantly changes due to the increase / decrease of the feeding amount of the fiber cord 101.

  On the other hand, in the driving side collar 10 and the driven side collar 20 adjacent to the elastic joint 1 (see FIG. 1) of the present invention, the yarn winding device 100 (FIG. 9) in which the nozzle 106 is disposed at a position lower than the table 129. ), The nozzle 106 rotates on the circumference of a perfect circle centered on the axis O5 set at the intermediate position between the axis O2 of the drive side collar 10 and the axis O3 of the driven side collar 20 which are adjacent to each other. A fiber cord 101 fed out while moving in a perfect circle at C is wound.

  Therefore, as compared with the yarn winding device in which the support portion is arranged at the same height as the table 129 or higher than the table 129, the driving side collar 10 and the driven collar provided adjacent to the elastic joint 1 (see FIG. 1) of the present invention. The feeding path from the bobbin 103 to the tension adjusting unit 105 of the yarn winding device 100 for winding the fiber cord 101 around the side collar 20 can be set to be long (see FIG. 9).

  Therefore, compared with the case where the fiber cord 101 is wound around the drive side collar 10 and the driven side collar 20 that are provided adjacently by a bobbin winding device in which the support portion is disposed at the same height as the table 129 or higher than the table 129, The change in the speed of the nozzle 106 in the tangential direction of the adjacent driving side collar 10 and driven side collar 20, that is, the change in the tension of the fiber cord 101 caused by the variation in the feeding length of the nozzle 106 can be reduced.

  Accordingly, the nozzle 106 moves in a circle on the circumference of a perfect circle centering on the axis O5 set at an intermediate position between the axis O2 of the adjacent drive side collar 10 and the axis O3 of the driven side collar 20. However, when the fiber cord 101 is wound around the adjacent driving-side collar 10 and driven-side collar 20, it is possible to suppress the occurrence of disturbance in the winding state of the fiber cord 101.

  Further, since the nozzle 106 of the yarn winding device 100 (FIG. 9) can be moved in a perfect circle, the structure of the electric motor M (FIG. 10) that drives the nozzle 106 of the yarn winding device 100 can be simplified. The rotation speed of the nozzle 106 can be increased. Therefore, the winding time of the fiber cord 101 can be shortened, and the productivity of the elastic joint 1 (see FIG. 1) can be improved.

  Further, the second tension roller 122 positioned above the nozzle 106 can cope with the change in the tensile force applied by the nozzle 106 to the tip of the fiber cord 101, and the responsiveness to the change in tension can be improved. . Therefore, vibration of each part of the yarn winding device 100 can be suppressed.

  Therefore, the nozzle 106 has an axial center O5 (see FIG. 13) set at an intermediate position between the axial center O2 of the driving side collar 10 and the axial center O3 of the driven side collar 20 supported by the table 129 (see FIG. 9). Since the fiber cord 101 is wound around the driving side collar 10 and the driven side collar 20 while moving on the circumference of a perfect circle at the center (circular movement) along the rotation locus C, the nozzle 106 causes the axis O5 to move. The structure of the rotation mechanism for rotating the nozzle 106 can be simplified as compared with the case where the fiber cord 101 is wound while moving on the circumference of an ellipse as the center along the rotation locus D (ellipse motion). . Therefore, the winding time of the fiber cord 101 can be shortened, and the productivity of the elastic joint 1 can be improved.

  Furthermore, in the elastic joint 1 of the present invention, the separation distance L1 (see FIG. 1) between the axis O2 of the driving side collar 10 and the axis O3 of the driven side collar 20 that are adjacent to each other is the axis of the elastic body 40, That is, the distance is set shorter than the separation distance L2 (see FIG. 4) from the axis O1 of the elastic joint 1 to the axis O1 of the driving side collar 10 or the driven side collar 20 (see FIGS. 1 and 4). Therefore, a general elastic joint (the distance L1 between the axial center O2 of the driving side collar 10 and the axial center O2 of the driven side collar 20 is determined from the outer center O1 of the cord circumscribed circle (see FIG. 1). Rotation of the fiber cord 101 when the nozzle 106 moves in a perfect circle as compared to the distance L2 (see FIG. 1) between the driving side collar 10 or the driven side collar 20 and the axial centers O1 and O2. The trajectory C can be set short.

  Therefore, when the fiber cord 101 is wound around the adjacent driving side collar 10 and driven side collar 20 by the yarn winding device 100 (see FIG. 9), the rotational speed of the nozzle 106 can be further increased. The productivity of the elastic joint 1 (see FIG. 1) can be further improved.

  Next, with reference to FIGS. 14 to 18, the elastic joint 201 according to the second embodiment of the present invention will be described. FIG. 14A is a front view of the elastic joint 201 in the second embodiment, and FIG. 14B is a side view of the elastic joint 201 viewed from the XIV (b) direction of FIG. 15 is a cross-sectional view of the elastic joint 201 taken along line XV-XV in FIG. 14B, and FIG. 16 is a cross-sectional view of the elastic joint 201 taken along line XVI-XVI in FIG.

  Further, FIG. 17 is a partially enlarged front view of the elastic joint 201 of FIG. 14A, and FIG. 18A is a cross-sectional view of the elastic joint 201 taken along line XVIIIa-XVIIIa of FIG. (B) is sectional drawing of the elastic coupling 201 in the XVIIIb-XVIIIb line | wire of FIG. Moreover, the same code | symbol is attached | subjected to the part same as above-described 1st embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 1 and 2, in the driving side inner cylinder member 10a of the elastic joint 1 in the first embodiment, one end (left end in FIG. 2) of the driving side collar 10 projects in the axial direction. As shown in FIGS. 14 and 15, the drive-side inner cylinder member 210 of the elastic joint 201 in the second embodiment is configured with the shaft of the drive-side collar 10. A cylindrical member 210a with one end in the center (left end in FIG. 15) protruding in the axial direction, and outward in the radial direction (vertical direction in FIG. 15) of the cylindrical member 210a from one end (left end in FIG. 15) of the driving side collar 10 It is provided with a stepped portion 210b that protrudes and to which the head of a driving side fastening member (not shown) is pressed.

  As shown in FIGS. 1 and 2, the driven side inner cylinder member 20a of the elastic joint 1 in the first embodiment has the other end (right end in FIG. 3) of the driven side collar 20 in the axial direction. 14 and FIG. 16, the driven side inner cylindrical member 220 of the elastic joint 201 according to the second embodiment has a driven side collar 20. The other end (right end in FIG. 16) in the axial direction of the cylindrical member 220a is configured to project in the axial direction, and the radial direction of the cylindrical member 220a from the other end (right end in FIG. 16) of the drive side collar 10 (see FIG. And a stepped portion 220b that protrudes outward in the (16 vertical direction) and to which the head of a driving side fastening member (not shown) is pressed.

  As shown in FIGS. 14 to 16, the drive-side inner cylinder member 210 has a diameter at one end (left end in FIGS. 15 and 16) in the axial direction of the drive-side collar 10 from one end in the axial direction of the drive-side collar 10. Since the stepped portion 210b is provided projecting outward in the direction (upper and lower sides in FIGS. 15 and 16), it is excessive in the axial direction of the drive shaft (not shown) toward the other end (rightward in FIGS. 15 and 16). When a large load is applied to the elastic joint 201, the stepped portion 210 b is abutted against one end (the left end in FIGS. 15 and 16) of the cylinder portion 11 of the drive side collar 10, and the drive side inner cylinder with respect to the drive side collar 10 The relative displacement of the member 210 toward the other end (rightward in FIGS. 15 and 16) is restricted.

  On the other hand, as shown in FIGS. 14 to 16, the driven side inner cylindrical member 220 is radially outward from the other end (right end in FIGS. 15 and 16) of the driven side collar 20 in the axial direction (FIGS. 15 and 16). 16 (upper and lower sides) is provided with a protruding stepped portion 220b, so that an excessive load facing one end (leftward in FIGS. 15 and 16) is applied to the elastic joint 201 in the axial direction of the driven shaft (not shown). In this case, the stepped portion 220b is abutted against the other end (the right end in FIGS. 15 and 16) of the driven side collar 20, and is directed toward one end of the driven side inner cylindrical member 220 with respect to the driven side collar 20 (leftward in FIGS. 15 and 16). Relative displacement is regulated.

  As a result, as shown in FIGS. 15 and 16, the drive shaft and the driven shaft (both not shown) are oriented toward the other end (rightward in FIGS. 15 and 16) and toward one end (leftward in FIGS. 15 and 16). ) Is applied to the elastic joint 201 by the stepped portion 210b of the driving side inner cylinder member 210 against the load toward the other end (rightward in FIGS. 15 and 16) When the load is directed toward one end (leftward in FIGS. 15 and 16), the stepped portion 220 b of the driven inner cylinder member 220 causes the relative displacement of the driving inner cylinder member 210 relative to the driving collar 10 and the driven collar 20. Since the relative displacement of the driven side inner cylinder member 220 is restricted, the driving side inner cylinder member 210 is prevented from falling off from the driving side collar 10 and the driven side inner cylinder member 220 is prevented from falling out from the driven side collar 20. It is possible.

  Further, since the stepped portion 210b is protruded radially outward from the one end in the axial direction of the drive side collar 10 (upper and lower sides in FIGS. 15 and 16), the drive side inner cylinder member 210 is connected to the drive side fastening member. The stepped portion 220b can be secured in a radial direction from the other axial end of the driven side collar 20 (the right end in FIGS. 15 and 16). Since it protrudes outside (FIG. 15 and FIG. 16 upper and lower sides), it is possible to secure a seating surface on which the head (not shown) of the driven side fastening member 220 abuts.

  Therefore, even when the driving side inner cylinder member 210 and the driven side inner cylinder member 220 are thinned, a driving side fastening member (not shown) is attached to one end of the driving side inner cylinder member 210 and a driven side fastening member ( (Not shown) can be firmly fixed to the other end of the driven side inner cylinder member 220.

  Further, by reducing the thickness of the drive side inner cylinder member 210 and the driven side inner cylinder member 220, the cost of the elastic joint 201 can be reduced, and the torque transmission performance of the elastic joint 1 can be reduced while reducing the weight of the elastic joint 201. Can be improved.

  As shown in FIGS. 17 and 18, the stepped portion 210b of the driving side inner cylindrical member 210 is formed on the outer side (right side in FIG. 18) in the radial direction of the cylindrical member 210a, and the thickness L15 in the radial direction of the cylindrical member 210a. The stepped portion 220b of the driven-side inner cylindrical member 220 protrudes outward in the radial direction of the cylindrical member 220a (left side in FIG. 18) in the radial direction of the cylindrical member 220a. It protrudes with a length L16 that is twice or more the wall thickness L15.

  Therefore, the outer edge of the stepped portion 210b of the driving side inner cylinder member 210 is viewed in the radial direction of the driving side collar 10 when viewed from one end side (the upper side in FIG. 18A) of the driving side inner cylinder member 210. The outer edge of the flange portion 12 projecting radially at the distance L14 of the driving side collar 10 beyond the outer edge of the cylindrical portion 11 constituted by the wall thickness L13, that is, the inner side from the outer edge of the driving side fiber cord bundle 31 (see FIG. 18 (a) on the left side.

  Similarly, as shown in FIGS. 17 and 18, the outer edge of the stepped portion 220b of the driven inner cylinder member 220 is the other end side in the axial direction of the driven inner cylinder member 220 (the lower side in FIG. 18B). ), The outer edge of the flange portion 22 protruding in the radial direction at a distance L14 of the driven side collar 20 beyond the outer edge of the cylindrical portion 21 constituted by the thickness L13 in the radial direction of the driven side collar 20; In other words, the driven fiber cord bundle 32 is disposed on the inner side (left side in FIG. 18B) from the outer edge.

  Therefore, the stepped portion 210b to which the head (not shown) of the driving side fastening member is pressed is radially outward from one end in the axial direction of the cylindrical member 210a (see FIG. 18A). The right side of the cylindrical portion 11 of the driving shaft 11 is provided so that even if excessive bending input in a direction orthogonal to the axial direction of the driving shaft (not shown) is applied to the driving shaft, the driving side collar One end of the ten cylindrical portions 11 is abutted against the stepped portion 210b of the driving side inner cylindrical member 210, and the relative displacement of the driving side inner cylindrical member 210 with respect to the driving side collar 10 is restricted.

  Similarly, the stepped portion 220b to which the head (not shown) of the driven side fastening member is pressed is radially outward from the other end in the axial direction of the driven side inner cylindrical member 220 (see FIG. 18 (b) to the right of the cylindrical portion 21), even if excessive bending input in a direction orthogonal to the axial direction of the driven shaft (not shown) is applied to the driven shaft. The other end of the cylindrical portion 21 of the driven side collar 20 is abutted against the stepped portion 220b of the driven side inner cylindrical member 220, and the relative displacement of the driven side inner cylindrical member 220 with respect to the driven side collar 20 is restricted.

  Therefore, even when an excessive bending input in a direction (left and right direction in FIG. 18) perpendicular to the axial center direction of the drive shaft or driven shaft (both not shown) is applied to the elastic joint 201, the drive side collar 10 Further, it is possible to prevent the drive-side inner cylinder member 210 and the driven-side inner cylinder member 220 from being displaced with respect to the driven-side collar 20. Therefore, the shake of the axial center O1 of the elastic joint 201 which is a rotating body can be suppressed.

  Further, as shown in FIGS. 17 and 18, the outer edge of the stepped portion 210 b of the driving side inner cylinder member 210 viewed from the direction of the axis O <b> 2 of the driving side inner cylinder member 210 is the axis of the driving side inner cylinder member 210. The driven-side inner cylinder member 220 is disposed on the inner side (left side in FIG. 18A) of the driving-side fiber cord bundle 31 as viewed from the O2 direction, and is viewed from the direction of the axis O3 of the driven-side inner cylinder member 220. The outer edge of the stepped portion 220b is disposed on the inner side (left side in FIG. 18B) of the driven side fiber cord bundle 32 when viewed from the direction of the axis O3 of the driven side inner cylindrical member 220. A portion of the elastic body 41 and the second elastic body 42 disposed between the flange portion 12 of the driving side collar 10 and the flange portion 22 of the driven side collar 20 (the axial direction of the first elastic body 41 and the second elastic body 42). The rubber thickness L8 of the portion that can contribute to elastic deformation in the step is the stepped portion. 10b, it can be avoided reduced by 220b.

  That is, the outer edge of the stepped portion 210b of the driving side inner cylinder member 210 viewed from the direction of the axis O2 of the driving side inner cylinder member 210 is the driving side fiber cord bundle viewed from the direction of the axis O2 of the driving side inner cylinder member 210. When arranged outside the outer edge of 31 (on the right side in FIG. 18 (a)), the winding portions 31a and 31c of the driving side fiber cord bundle 31 and the winding portions 32a and 32c of the driven side fiber cord bundle 32 are punched. The rubber thickness L8 between the portions 40b, that is, the rubber thickness of the portion (free length portion) that can contribute to the elastic deformation in the axial direction of the first elastic body 41 and the second elastic body 42 can be ensured.

  Therefore, even when the stepped portions 210b and 220b are provided, the rubber thickness of the portion (free length portion) that can contribute to the elastic deformation in the axial direction of the first elastic body 41 and the second elastic body 42 is ensured. The free length portions of the first elastic body 41 and the second elastic body 42 can be elastically deformed in the axial direction without being obstructed by the stepped portions 210b and 220b. It is possible to reliably absorb displacement caused by axial vibration or torsion that occurs between the shafts (both not shown).

  Although the present invention has been described based on the embodiments of the present invention, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  In the above embodiment, the case where the driving side inner cylinder member 10a and the driven side inner cylinder member 20a are separately press-fitted into the driving side collar 10 and the driven side collar 20, respectively. The collar 10 and the driven side collar 20, and the driving side inner cylinder member 10a and the driven side inner cylinder member 20a may be integrally formed.

  In this case, the assembly work of assembling the driving side inner cylinder member 10a and the driven side inner cylinder member 20a to the driving side collar 10 and the driven side collar 20 can be omitted, and the driving side collar 10 and the driven side collar 20 are molded. The work before setting in the mold can be simplified.

  In addition, the same number of punched portions 40b as the driving side collar 10 and the driven side collar 20 are drilled, but only the first elastic body 41 disposed on the inner periphery of the driving side fiber cord bundle 31 has the punched portions 40b. You may drill.

(A) is a front view of the elastic joint in 1st embodiment of this invention, (b) is a side view of the elastic joint seen from the I (b) direction of Fig.1 (a). It is sectional drawing of the elastic joint in the II-II line | wire of Fig.1 (a). It is sectional drawing of the elastic joint in the III-III line | wire of Fig.1 (a). It is a partially expanded front view of the elastic joint of FIG. It is sectional drawing of the elastic joint in the VV line | wire of FIG.1 (b). It is sectional drawing of the elastic joint in the VI-VI line of FIG.1 (b). (A) is sectional drawing of the elastic joint in the VIIa-VIIa line | wire of Fig.4 (a), (b) is sectional drawing of the elastic coupling in the VIIb-VIIb line | wire of Fig.4 (a). (A) is sectional drawing of the elastic coupling in the VIIIa-VIIIa line of Fig.4 (a), (b) is sectional drawing of the elastic coupling in the VIIIb-VIIIb line of Fig.4 (a). It is a schematic front view of a yarn winding device. FIG. 10 is a partial side view of the yarn winding device viewed from the direction of arrow A3 in FIG. 9. FIG. 10 is a partially enlarged front view of the yarn winding device in the XI portion of FIG. 9. FIG. 10 is a partially enlarged front view of the yarn winding device at the XII portion in FIG. 9. It is a schematic plan view of the driving side collar and the driven side collar showing the trajectory of the fiber cord. (A) is a front view of the elastic joint in 2nd embodiment, (b) is a side view of the elastic joint seen from the XIV (b) direction of Fig.14 (a). It is sectional drawing of the elastic joint in the XV-XV line | wire of Fig.14 (a). It is sectional drawing of the elastic joint in the XVI-XVI line | wire of Fig.14 (a). It is a partially expanded front view of the elastic coupling of Fig.14 (a). (A) is sectional drawing of the elastic joint in the XVIIIa-XVIIIa line of FIG. 17, (b) is sectional drawing of the elastic coupling in the XVIIIb-XVIIIb line of FIG.

Explanation of symbols

1,201 Elastic joint 10 Drive side collar (part of drive side connection element)
10a, 210 Driving side inner cylinder member (part of driving side connecting element)
210b Stepped portion 20 driven side collar (part of driven side connecting element)
20a, 220 driven side inner cylinder member (part of driven side connecting element)
220b Stepped portion 30 Fiber cord bundle 31 Drive side fiber cord bundle (part of fiber cord bundle)
32 Driven side fiber cord bundle (part of fiber cord bundle)
40 elastic body 40b hole-extracted portion 44 fourth elastic body (elastic portion on the side of meat stealing portion)
50 Meat stealing section 100 Thread winding device 101 Fiber cord 103 Bobbin 104 Holding section 105 Tension adjusting section 121 First tension roller 122 Second tension roller 106 Insertion section (nozzle)
107 Cord winding mechanism 129 Table L1 Separation distance (separation distance between the axis of the drive-side connecting element and the axis of the driven-side connection element)
L2 separation distance (distance between the outer circumference of the cord circumscribing circle and the axis of the drive side connection element or driven side connection element)
L3 winding part separation distance (radius of code circumscribed circle)
L4 Extension part separation distance (shortest distance from the outer circumference of the cord circumscribing circle to the fiber cord on the meat stealer side)
L5 winding thickness (winding thickness of fiber cord bundle)
L6 opening width (width in the circumferential direction of the punched part)
L7 Rubber thickness (Rubber thickness in the circumferential direction of the elastic body between the extension part of the fiber cord bundle)
L8 rubber thickness (rubber thickness in the radial direction of the elastic body between the punched portion and the winding portion of the fiber cord bundle)
L10 Rubber thickness (Rubber thickness of the outer peripheral elastic part)
L11 width (radial width of the meat stealer)
m1 Elastic circumscribing circle m2 Cord circumscribing circle O1 shaft center (elastic joint shaft, elastic body circumcircle, cord circumcircle outer center)
O2 axis (axis of drive side connection element)
O3 axis (axis of driven side connection element)
O5 shaft center (shaft center set at an intermediate position between the shaft center of the drive side connecting element and the axis of the driven side connecting element)
M Electric motor (rotary drive)

Claims (4)

A plurality of drive side connection elements connected to the drive shaft via a drive side fastening member, and a plurality of followers arranged alternately and concentrically with the drive side connection element and connected to the driven shaft via a driven side fastening member Side connection elements, a plurality of endless fiber cord bundles formed by winding fiber cords around the adjacent drive side connection elements and driven side connection elements, the plurality of fiber cord bundles, An elastic joint comprising a driving side connection element and an elastic body in which the plurality of driven side connection elements are buried,
The driving side connecting element is a cylindrical driving side collar around which the fiber cord is wound, and a cylindrical shape that is press-fitted into an inner peripheral hole of the driving side collar and through which the shaft portion of the driving side fastening member is inserted. A drive side inner cylinder member,
The driven-side connecting element is a cylindrical driven-side collar around which the fiber cord is wound, and a cylindrical shape that is press-fitted into an inner peripheral hole of the driven-side collar and through which the shaft portion of the driven-side fastening member is inserted. A driven side inner cylinder member,
The drive-side inner cylinder member protrudes outward in the radial direction of the inner cylinder member from one end of the drive-side collar in the axial direction at one end in the axial direction of the drive-side collar and the drive-side fastening member With a stepped portion to which the head of
The driven inner cylinder member projects outwardly in the radial direction of the inner cylinder member from the other axial end of the driven collar at the other axial end of the driven collar. A stepped portion with which the head of the fastening member is pressed,
The outer edge of the stepped portion of the drive side inner cylinder member is disposed inside the outer edge of the fiber cord bundle as viewed from the axial direction of the drive side inner cylinder member, and the driven side inner cylinder member The elastic joint according to claim 1, wherein an outer edge of the stepped portion is disposed on an inner side than an outer edge of the fiber cord bundle when viewed from an axial direction of the driven inner cylindrical member. When an elastic body circumscribed circle that is a virtual circle and circumscribes the elastic body formed in a polygonal shape when viewed from the axial direction of the driving side connecting element or the driven side connecting element is set, A meat stealer that is a gap provided between a circle and the elastic body,
The elastic body includes a punched portion that is a hole drilled in the axial direction of the drive side connection element or the driven side connection element between the adjacent drive side connection element and the driven side connection element. ,
The circumferential width of the punched portion is set smaller than the winding thickness of the fiber cord bundle,
The elastic joint according to claim 1, wherein a width of the meat stealing portion in a radial direction is set to be smaller than a circumferential width of the punched portion. The fiber cord bundle is linearly extended between a winding portion wound around the drive side connection element or the driven side connection element, and the adjacent drive side connection element and the driven side connection element. An extension part,
The elastic body between the hole punching portion and the winding portion of the fiber cord bundle as compared to the rubber thickness in the radial direction of the elastic body between the hole punching portion and the extending portion of the fiber cord bundle. 3. The elastic joint according to claim 2, wherein the rubber thickness in the circumferential direction is set to be thin. The separation distance between the axis of the drive-side connection element and the axis of the driven-side connection element that are adjacent to each other is from the outer center of the cord circumscribing circle to the axis of the drive-side connection element or the driven-side connection element. The elastic joint according to claim 3, wherein the elastic joint is set to be shorter than the distance between.

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