JP2009150426A - Transmission belt and method for mounting transmission belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission belt and a method for mounting the transmission belt capable of easily and surely mounting an element and rings divided into two rows. <P>SOLUTION: In the transmission belt V having a recess 7 for storing two rows of endless annular rings R in parallel formed thereon, making the two rows of the rings R engaged with each other in opening end sides of right and left inner surfaces 5a, 6a of the recess 7, having a plurality of elements E having fall-off prevention parts 8, 9 preventing breakaway annularly disposed to set the opening end side at an outer circumference side, and having the two rows of rings R fitted and mounted inside both the fall-off prevention parts 8, 9 of the annularly disposed row of the elements E, the two row of rings R are composed of two kinds of divided rings 13, 14 having the same circumference lengths but different shapes. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transmission belt constituted by arranging a large number of plate-like elements facing each other in an annular shape, and assembling these elements into an endless annular ring so as to be annularly bound, and an assembling method thereof. .

  Generally, as a transmission that is used when power is transmitted between a plurality of rotating members, a stepped transmission that can change a gear ratio stepwise, and a gear ratio that changes continuously, that is, steplessly. There are known continuously variable transmissions, and belt-type continuously variable transmissions, toroidal-type continuously variable transmissions, and the like are known as the latter continuously variable transmission. Of these, the belt-type continuously variable transmission is a transmission that uses two sets of pulleys, a driving pulley and a driven pulley, and a transmission belt wound around these pulleys to change the gear ratio steplessly. is there. As a power transmission belt used in such a belt-type continuously variable transmission, for example, a large number of plate pieces called elements or blocks are arranged in an annular shape by overlapping each other in the plate thickness direction. A belt formed into an endless ring shape is known by binding the ring in a ring shape with a ring or band or carrier called a carrier.

  When the drive pulley is driven in a state in which such a transmission belt is wound around two sets of pulleys on the drive side and the driven side, the friction force of the contact portion between the element and the drive side pulley is applied to the element, And the compression force of the lamination direction of the element applied to an element from a drive side pulley according to the torque of a drive side pulley, ie, the thickness direction of an element, acts. Then, the compressive force transmitted to the element in contact with the driving pulley is transmitted to the element in contact with the driven pulley via the element not wound around the pulley. When a compressive force is transmitted to the element in contact with the driven pulley, the driven pulley is rotated in accordance with the frictional force of the contact portion between the element and the driven pulley and the transmitted compressive force. Torque is generated. In this way, power is transmitted between the driving pulley and the driven pulley via the transmission belt.

  An example of the transmission belt as described above is described in Patent Document 1. The high load transmission belt described in Patent Document 1 is a transmission belt including a center belt and a block that reinforces side pressure resistance, and specifically, two belts having a locking portion at the upper end. Both sides of the belt and the block (element) formed by the connecting member that connects them at the lower end, and the engagement groove (opening recess of the element) that is open between the both engagement portions of the element It is constituted by two endless carriers (rings) fitted so as not to be detached from the element by the portion. The front and rear surfaces of the two belt side portions of the element are respectively provided with a convex portion and a concave portion, and the convex portion and the concave portion are fitted between the front and rear elements, so that the element is attached to the belt. They are arranged even while driving.

JP 2000-249195 A

  The transmission belt described in the above-mentioned Patent Document 1 has a locking portion that locks the ring and the element at the belt side portions at both ends of the element, and is adjacent to the plane portion above both belt side portions. The fitting uneven part which mutually fits between the elements to be formed is formed. That is, the concave and convex portions for fitting are provided in two places symmetrically on both sides of the element. A transmission belt is configured by fitting two rows of rings into an opening recess formed between the side portions of the belts and assembling them so as to be locked by the locking portions.

  In such a transmission belt, when the elements are assembled to the ring or when the elements assembled to the ring are removed from the ring, it is necessary to realize a state in which parts of the rings arranged in two rows are overlapped with each other. There is. That is, when an element is assembled to or removed from the two rows of rings, the two rows of rings are twisted and overlapped with each other so that the width of the two rows of rings can be adjusted between the locking portions of the elements. It is necessary to make the state narrower than the opening width.

  In order to twist the two rows of rings so that they overlap each other, adjacent elements need to be rotated relative to each other, that is, rolled. However, since the transmission belt described in Patent Document 1 has two uneven portions that are fitted to each other between adjacent elements on the left and right sides of the element, the operation of the elements in the rolling direction is restricted. End up. As a result, it becomes difficult to make the two rows of rings overlap each other, and the transmission belt may not be assembled.

  Furthermore, if the two rows of rings are overlapped and fitted into the opening recess of the element, interference may occur between the edge portions of the portions of the two rows of rings that are overlapped with each other. That is, for example, as shown in FIG. 12, when two rows of rings r1 and r2 are fitted into the opening recesses of the element e, the outer circumferential surface of the inner ring r1 and the outer ring r2 are opposed to each other in the overlapped state. In some cases, the edge portion connected to the side surface to be connected and the edge portion connected to the inner peripheral surface of the outer ring r2 and the side surface facing the inner ring r1 may interfere with each other. As a result, it becomes difficult to assemble the two rows of rings and the elements, and the assemblability of the transmission belt is lowered.

  As described above, there is still room for improvement in the conventional transmission belt configured by assembling the element having the opening recess and the two rows of rings in order to facilitate the assembly and improve the assembly. It was.

  The present invention has been made paying attention to the above technical problem, and provides a transmission belt and a transmission belt assembly method capable of easily and reliably assembling an element and a ring divided into two rows. It is intended.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a recess for accommodating two endless ring-shaped rings in parallel is formed, and the opening 2 on the left and right inner surfaces of the recess is arranged on the opening end side. A large number of elements formed with retaining portions that are engaged with the ring of the row to prevent its separation are arranged in a ring shape so that the opening end side is on the outer peripheral side, and in the row of the elements arranged in the ring shape In the transmission belt in which the two rows of rings are fitted and assembled on the inner peripheral side of the both retaining portions, the two rows of rings are composed of two types of split rings having the same circumference and different shapes. It is a transmission belt characterized by having it.

  According to a second aspect of the present invention, in the first aspect of the invention, the two rows of rings are arranged in parallel with the first divided ring whose outer peripheral side in the thickness direction is narrower than the inner peripheral side, and the first divided ring. Then, the transmission belt is characterized in that it includes a second split ring which is accommodated in the recess and whose outer peripheral side is wider than the inner peripheral side.

  According to a third aspect of the present invention, in the first aspect of the invention, the two rows of rings are disposed on the inner peripheral side of the first outer layer ring having a relatively narrow width and the first outer layer ring. A first split ring formed from a first inner layer ring wider than one outer layer ring, and a second outer ring having a relatively wide width while being accommodated in the recess in parallel with the first split ring And a second split ring that is disposed on the inner peripheral side of the second outer layer ring and is formed of a second inner layer ring that is narrower than the second outer layer ring. .

  According to a fourth aspect of the present invention, in the first aspect of the invention, the two rows of rings are accommodated in the recess in parallel with the narrow divided ring having a relatively narrow width and the narrow divided ring. And a wide split ring having a width wider than that of the narrow split ring.

  According to a fifth aspect of the present invention, in the transmission belt according to the fourth aspect, the wide divided ring includes a divided ring that is at least 1.5 times wider than the narrow divided ring. is there.

  On the other hand, the invention of claim 6 is formed with recesses for accommodating two endless ring-shaped rings in parallel, and the two rows of rings are engaged with the open end sides of the left and right inner surfaces of the recesses. A large number of elements formed with retaining portions for preventing the separation are arranged in an annular shape so that the opening end side is on the outer peripheral side, and the inside of the both retaining portions in the row of the elements arranged in the annular shape. In the method for assembling the transmission belt, the two rows of rings are fitted and assembled on the circumferential side, the two rows of rings are constituted by two types of split rings having the same circumference and different shapes. One of the divided rings is fitted on the inner peripheral side of one of the retaining portions, and then the other divided ring is fitted and assembled on the inner peripheral side of the other retaining portion. It is assembling method of the driving belt to be.

  According to a seventh aspect of the present invention, in the sixth aspect of the invention, the two rows of rings are arranged in parallel with the first divided ring having a narrower width on the outer peripheral side in the thickness direction than on the inner peripheral side. A second split ring that is housed in the recess and whose outer peripheral side is wider than the inner peripheral side, and the first split ring is fitted on the inner peripheral side of one of the retaining portions, and then The transmission belt assembling method is characterized in that the second split ring is fitted and assembled on the inner peripheral side of the other retaining portion.

  According to an eighth aspect of the present invention, in the sixth aspect of the invention, the two rows of rings are disposed on a first outer layer ring having a relatively narrow width and an inner peripheral side of the first outer layer ring, and A first split ring formed from a first inner layer ring wider than one outer layer ring, and a second outer ring having a relatively wide width while being accommodated in the recess in parallel with the first split ring And a second split ring that is arranged on the inner peripheral side of the second outer layer ring and is narrower than the second outer layer ring, and one of the retaining portions The transmission belt mounting method is characterized in that the first split ring is fitted on the inner peripheral side of the first belt, and then the second split ring is fitted and assembled on the inner peripheral side of the other retaining portion.

  According to a ninth aspect of the present invention, in the sixth aspect of the invention, the two rows of rings are accommodated in the recess in parallel with the narrow divided ring having a relatively narrow width and the narrow divided ring. And the wide split ring having a width wider than the narrow split ring, and the narrow split ring is fitted on the inner peripheral side of one of the retaining portions, and then the inner periphery of the other retaining portion. A transmission belt assembling method, wherein the wide split ring is fitted to the side and assembled.

  According to a tenth aspect of the present invention, in the transmission belt according to the ninth aspect, the wide divided ring includes a divided ring that is at least 1.5 times wider than the narrow divided ring. It is an assembly method.

  Therefore, according to the first aspect of the present invention, the two rows of rings are composed of two split rings having the same circumference and different shapes. For this reason, when two split rings having different shapes are fitted into the recesses of the element and assembled, the two split rings are arranged in order so that the assembly of the split rings in the recesses of the element is easy. Can be fitted on the circumferential side. As a result, it is possible to easily and reliably assemble the two rows of rings and elements, and to improve the assembly performance of the transmission belt.

  Further, according to the invention of claim 2, the two rows of rings are formed so that the width becomes narrower toward the outer peripheral side, and conversely, the width becomes narrower toward the inner peripheral side. It is comprised from two division | segmentation rings with the 2nd division | segmentation ring formed in this. Therefore, when these two split rings are fitted into the concave portion of the element and assembled, the first split ring is first fitted on the inner peripheral side of the retaining portion of the concave portion of the element, and the second split ring is later attached to the element. By fitting on the inner peripheral side of the retaining portion of the recess, the outer peripheral surface of the inner peripheral ring and the side surface facing the outer peripheral ring when the two rows of rings are overlapped with each other are connected Interference between the edge portion and the edge portion where the inner peripheral surface of the outer ring and the side surface facing the inner ring can be avoided or suppressed. As a result, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 3, the two rows of rings are located on the inner peripheral side and are relatively wider than the first inner layer ring and located on the outer peripheral side and are narrower than the first inner layer ring. In contrast to the first split ring having a two-stage structure with the first outer layer ring, on the contrary, a second inner layer ring having a relatively narrow width located on the inner circumferential side and a second inner ring located on the outer circumferential side. It is composed of two split rings including a second split ring having a two-stage structure with a second outer layer ring wider than the inner layer ring. Therefore, when these two split rings are fitted into the concave portion of the element and assembled, the first split ring is first fitted on the inner peripheral side of the retaining portion of the concave portion of the element, and the second split ring is later attached to the element. By fitting on the inner peripheral side of the retaining portion of the recess, the outer peripheral surface of the inner peripheral ring and the side surface facing the outer peripheral ring when the two rows of rings are overlapped with each other are connected Interference between the edge portion and the edge portion where the inner peripheral surface of the outer ring and the side surface facing the inner ring can be avoided or suppressed. As a result, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 4, the two rows of rings have the same circumferential length and a rectangular cross section, and a narrow divided ring having a relatively narrow width, and a width wider than the narrow divided ring. Is composed of two split rings with a wide wide split ring. Therefore, when these two split rings are fitted into the recesses of the element and assembled, the narrow split ring is first fitted on the inner peripheral side of the retaining portion of the recess of the element, and the wide split ring is subsequently inserted into the recess of the element. By fitting into the inner peripheral side of the retaining portion, the wide divided ring can be inserted deeper into the space on the inner peripheral side of the retaining portion of the recess. As a result, the wide split ring to be fitted later is brought closer to the element, in other words, the wide split ring is inserted into the concave portion in a state where the angle between the width direction of the wide split ring and the width direction of the element becomes smaller. It can be fitted on the inner peripheral side of the retaining portion. For this reason, the two rows of rings can be fitted into the inner peripheral side of the retaining portion of the recess without overlapping or slightly overlapping the two rows of rings. Interference between facing edge portions can be avoided or suppressed. Therefore, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 5, the two split rings are formed so that the width of the wide split ring is at least 1.5 times the width of the narrow split ring. Therefore, when assembling these two split rings into the concave portion of the element, it is possible to reliably obtain the effect of improving the assemblability by providing a difference in the width of the two split rings.

  On the other hand, according to the invention of claim 6, two rows of rings composed of two split rings having the same circumferential length and different shapes are used and assembled to the element. Then, when these two rows of rings, that is, two split rings having different shapes are fitted into the recesses of the element and assembled, the two split rings are arranged in order so that the assembly is easy. It is fitted on the inner peripheral side of the retaining part. Therefore, it is possible to easily and reliably assemble the two rows of rings and elements, and to improve the assembly performance of the transmission belt.

  Further, according to the invention of claim 7, as the two divided rings, the first split ring formed so that the width becomes narrower toward the outer peripheral side, and conversely, the width becomes narrower toward the inner peripheral side. Two split rings with a second split ring formed on When these two split rings are fitted into the concave portion of the element and assembled, first, the first split ring is fitted into the inner peripheral side of the retaining portion of the concave portion of the element, and then the second split ring is Is fitted on the inner peripheral side of the retaining portion of the recess. Therefore, an edge portion connecting the outer peripheral surface of the inner ring and the side surface facing the outer ring when the two rows of rings are overlapped with each other, and the inner peripheral surface of the outer ring It is possible to avoid or suppress interference with an edge portion connected to the side surface facing the inner ring. As a result, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 8, as the two rows of rings, the first inner layer ring located on the inner peripheral side and relatively wide, and the first inner layer ring located on the outer peripheral side are narrower than the first inner ring. In contrast to the first split ring having a two-stage structure with the first outer layer ring, on the contrary, a second inner layer ring having a relatively narrow width located on the inner circumferential side and a second inner ring located on the outer circumferential side. Two split rings with a second split ring having a two-stage structure with a second outer layer ring wider than the inner layer ring are used. When these two split rings are fitted into the concave portion of the element and assembled, first, the first split ring is fitted into the inner peripheral side of the retaining portion of the concave portion of the element, and then the second split ring is Is fitted on the inner peripheral side of the retaining portion of the recess. Therefore, an edge portion connecting the outer peripheral surface of the inner ring and the side surface facing the outer ring when the two rows of rings are overlapped with each other, and the inner peripheral surface of the outer ring It is possible to avoid or suppress interference with an edge portion connected to the side surface facing the inner ring. As a result, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 9, as two rows of rings, a narrow divided ring having the same circumferential length and a rectangular cross section, and a relatively narrow width, and a width wider than the narrow divided ring. Two split rings with a wide wide split ring are used. When these two split rings are fitted into the recess of the element and assembled, first, the narrow split ring is fitted into the inner peripheral side of the retaining portion of the recess of the element, and then the wide split ring is Fit into the recess. As a result, the wide split ring can be inserted deeper into the space on the inner peripheral side of the retaining portion of the recess, and the wide split ring to be fitted later is brought closer to the element, in other words, the width of the wide split ring. In the state where the angle between the direction and the width direction of the element becomes smaller, the wide split ring can be fitted on the inner peripheral side of the retaining portion of the recess. For this reason, the two rows of rings can be fitted into the inner peripheral side of the retaining portion of the recess without overlapping or slightly overlapping the two rows of rings. Interference between facing edge portions can be avoided or suppressed. Therefore, the two rows of rings and elements can be assembled easily and reliably.

  According to the invention of claim 10, the two split rings formed respectively are used so that the width of the wide split ring is at least 1.5 times the width of the narrow split ring. Therefore, when assembling these two split rings into the recess of the element, it is possible to reliably obtain the effect of improving the assemblability by providing a difference in the width of the two split rings.

  Next, the present invention will be specifically described with reference to the drawings. First, as an embodiment of the present invention, a configuration example of a transmission belt according to the present invention will be described, and then an assembly example by the transmission belt assembly method according to the present invention will be sequentially described below.

(First embodiment)
First, the structure of elements and rings constituting the transmission belt in the first embodiment of the present invention will be described with reference to FIGS. 1 and 2, the transmission belt V is wound around a drive side (input shaft) pulley and a driven side (output shaft) pulley of a belt type continuously variable transmission, and transmits power between these pulleys. An example of a belt is shown. And many elements E in this invention consist of a plate-shaped member made of metal, for example, and the left and right side surfaces 1 and 2 in the width direction (x-axis direction in FIG. 1) are tapered inclined surfaces. It has a formed main body (base body) portion 3, and both side surfaces 1 and 2 inclined in a tapered shape are belt winding grooves (the pulley winding 4 of the pulley 4 which is a driving pulley or a driven pulley of a belt type continuously variable transmission). Torque is transmitted by frictional contact with the (V-shaped groove) 4a.

  At both left and right ends in the width direction of the main body 3 (x-axis direction in FIG. 1), a part of the main body 3 and above the element E in the vertical direction (y-axis direction in FIGS. 1 and 2) Left and right column parts 5 and 6 are formed respectively. Accordingly, the upper end surface 3a which is the upper edge portion in FIGS. 1 and 2 of the main body 3, and the left and right inner surfaces 5a and 6a facing the center in the width direction of the main body 3 of both pillars 5 and 6; Thus, a recess 7 is formed which is open on the upper side of element E (upper side in the y-axis direction in FIG. 1), that is, on the outer peripheral side of transmission belt V.

  The concave portion 7 is a portion for inserting and accommodating an endless annular ring R for binding the elements E arranged in an annular shape in close contact with each other, so that the upper end surface 3a is located inside the ring R. It is a saddle surface 3a on which the circumferential surface is placed in contact. In addition, the ring R in this invention is comprised by two types of division | segmentation rings from which circumference is equal and a shape differs. The detailed configuration of each of the divided rings will be described later.

At the upper end portions of the left and right column portions 5 and 6, left and right retaining portions 8 and 9 having left and right distal end surfaces 8a and 9a extending toward the center in the width direction of the main body 3 are respectively provided on both column portions 5. , 6 are integrally formed. In other words, the inner surface 5a, 6a on the opening end of the recess 7 (the end of the outer periphery of the transmission belt in the recess 7) is directed toward the center in the width direction of the recess 7 (x-axis direction in FIG. 1). Retaining portions 8 and 9 are respectively formed. For this reason, the opening width of the recess 7 is defined by the distance W ₁ between the two front end surfaces 8 a and 9 a facing each other on the opening end side of the recess 7. Then, the bottom 7a (i.e. saddle face (upper end face) 3a) of the recess 7 side, both the distal end surface 8a, and has a wide opening width _{W 2} than the distance (opening width) _{W 1} between 9a.

  A large number of elements E constituting the transmission belt V are bound by a ring R in an annular arrangement, and are wound around the pulleys 4 on the driving side and the driven side in this state. Therefore, in the state of being wound around the pulley 4, each element E needs to spread out in a fan shape with respect to the center of the pulley 4 and be in close contact with each other. A portion (a portion on the center side in an annular arrangement) is formed thin.

  That is, the thickness of the main body 3 is gradually reduced in a state where a lower portion is scraped off from a portion that is lower (offset) by a predetermined dimension than the saddle surface 3a on one surface (for example, the left surface in FIG. 2). Yes. Therefore, the thickness of each element E changes in a state where the elements E spread out in a fan shape, in other words, in a belt-curved state where the elements E are wound around the pulley 4 and arranged in an arc shape and the belt is curved. Contact at the boundary. The edge of this boundary portion is a so-called rocking edge 10.

  A dimple 11 for determining the relative position of each element E in the linear state of the belt in which each element E does not wrap around the pulley 4 and is arranged in a straight line is provided at the central portion in the width direction of the main body 3 of the element E. A hole 12 is formed. Specifically, a frustoconical dimple 11 that is convex on one surface side of the main body 3 (in the example of FIG. 2, the surface side with the locking edge 10) is formed. A bottomed cylindrical hole 12 for loosely fitting (free fitting) the dimple 11 in the adjacent element E is formed on the surface opposite to the dimple 11.

  Therefore, when these dimples 11 and the holes 12 are fitted in the belt linear state, the relative positions of the elements E in that state in the horizontal direction and the vertical direction in FIG. 1 can be determined. When the step transmission is operated, rattling of the transmission belt V can be prevented and the transmission belt V can be driven stably.

  In the belt constituted by assembling the element E provided with the recess 7 for accommodating the rings R divided in two rows in parallel and the two rows of rings R, such as the transmission belt V of the present invention described above. For example, when the two rows of rings r1 and r2 are overlapped with each other and fitted into the opening recess of the element e as in the conventional belt shown in FIG. In some cases, interference occurs between the edge portions of the r2 overlapped portions, and the assembling property of the belt may be deteriorated.

Further, as shown in FIG. 13, when the two rows of rings r1 and r2 and the element e are assembled as described above, interference between the edge portions occurs (the state shown in FIG. 13A). the width dimension l ₁ of each ring r1, r2, by a short width l ₂ than the width l ₁ by shortening their width of each ring r1, r2, after the opening recess of the element e When the ring r2 is fitted, the interference between the edge portions as described above can be avoided (the state shown in FIG. 13B). However, in that case, by reducing the width of each of the rings r1 and r2, the cross-sectional areas of the rings r1 and r2 are reduced, and as a result, the strength of the rings r1 and r2 is reduced. Therefore, there is a limit to shortening the width of each of the rings r1, r2, and in the conventional belt having the above-described configuration, it is possible to improve the assembling performance without reducing the belt strength or power transmission capacity. It was difficult.

  Therefore, the transmission belt V composed of a large number of elements E and the ring R divided into two rows according to the present invention improves its assemblability without reducing the strength and power transmission capacity of the transmission belt V. In addition, the ring R is composed of two types of split rings 13 and 14 having the same circumference and different shapes. That is, the ring R is a so-called laminated ring formed by, for example, laminating a plurality of metal annular strips in the radial direction, and two types of first divided rings arranged in parallel in the recess 7. 13 and the second split ring 14.

Each of the split rings 13 and 14 is formed of a metal laminated ring having the same material, strength, and circumferential length (specifically, the circumferential length of the innermost circumferential surface). Further, the width dimension L _{1 of} the ring R (dimension in the x-axis direction in FIG. 1) L ₁ , that is, the total width dimension L ₁ in a state where the divided rings 13 and 14 are arranged in parallel, is the opening width W of the recess 7 of the element E. longer than _1, the shape and dimensions of the respective parts are formed is set to a value within a range shorter than the opening width W _2.

Specifically, as shown in FIG. 3, the divided rings 13 and 14 have different cross-sectional shapes by planes perpendicular to the circumferential direction of the ring R. That is, the first split ring 13, the width _{L 2} in the outermost surface 13a, the width _{L 1} of the half-ring R _{(i.e., L} 1/2) and is shorter than, at the innermost circumferential surface 13b the width dimension _{L 3,} is longer than the longer, i.e. width _{L 2} than the width half the dimension _{L 1} of the ring R _(L 1/2). Therefore, the width of the first split ring 13 is narrower on the outer peripheral side (upper side in FIG. 3) than on the inner peripheral side (lower side in FIG. 3) in the thickness direction (y direction in FIG. 3).

Then, and as a starting point thereof Both the width L ₃ of the width of the outermost peripheral surface 13a L ₂ and innermost surface 13b is a side 13c of the first split ring 13 (the end face of the left side of FIG. 3). In other words, both the outermost peripheral surface 13a and the innermost peripheral surface 13b are formed so as to be connected at right angles to the side surface 13c. Therefore, when the first split ring 13 is arranged in parallel with the second split ring 14, the facing surface 13d facing the second split ring 14 is a sloped surface whose width increases from the outermost peripheral surface 13a toward the innermost peripheral surface 13b. It has become.

On the other hand, the second split ring 14 has a width dimension _{L 4} in the outermost peripheral surface 14a, and is longer than the width _{L 1} of the half-ring R _(L 1/2), the width at the innermost peripheral surface 14b which L ₅ is shorter than short, that is, the width dimension _{L 4} than the width _{L 1} of the half-ring R _(L 1/2). Accordingly, the second split ring 14 is wider on the outer peripheral side (upper side in FIG. 3) than on the inner peripheral side (lower side in FIG. 3) in the thickness direction (y direction in FIG. 3).

Then, and as a starting point thereof Both the width L ₅ of the width of the outermost peripheral surface 14a L ₄ and innermost surface 14b is a side 14c of the second split ring 14 (right end face in FIG. 3). In other words, both the outermost peripheral surface 14a and the innermost peripheral surface 14b are formed so as to be connected at right angles to the side surface 14c. Therefore, when the second divided ring 14 is in parallel with the first divided ring 13, the opposing surface 14d facing the first divided ring 13 is a sloped surface whose width decreases from the outermost circumferential surface 14a toward the innermost circumferential surface 14b. It has become.

Each split ring 13 and 14, its thickness, i.e. the outermost peripheral surface 13a, 14a and the innermost surface 13b, the distance between 14b, are formed so as both equal in thickness _{T 1.} Also it is formed such that the width dimension L ₂ in the outermost peripheral surface 13a of the first split ring 13 and the width L ₅ at the innermost peripheral surface 14b of the second split ring 14 are equal, likewise the first split ring 13 the width dimension L ₃ at the innermost peripheral surface 13b and the width dimension L ₄ in the outermost peripheral surface 14a of the second split ring 14 is formed to be equal in.

Then, the sum of the width dimension L ₂ on the outermost peripheral surface 13 a of the first split ring 13 and the width dimension L _{4 on} the outermost peripheral surface 14 a of the second split ring 14, and the innermost peripheral surface 13 b of the first split ring 13. the width dimension L ₃ the sum of the width dimension L ₅ at the innermost peripheral surface 14b of the second split ring 14, both formed to have a width dimension L ₁ of the ring R.

Therefore, the gradients of the opposing surfaces 13d and 14d of the divided rings 13 and 14 are opposite in direction to the innermost circumferential surface of the ring R (that is, the innermost circumferential surfaces 13b and 14b) and are equal in size. It has become. Therefore, a ring R having a rectangular cross section with a width dimension of L ₁ and a thickness of T ₁ by bringing the first divided ring 13 and the second divided ring 14 into parallel with each other facing the respective facing surfaces 13d and 14d. Is configured.

  In this way, the opposing surfaces 13d and 14d of the split rings 13 and 14 have the same angle and have opposite gradients so that the shapes of the split rings 13 and 14 are different. Compared with the case where two split rings r1 and r2 having a rectangular cross section and the same shape and size are overlapped with each other, the ring R, that is, two rows of split rings as shown in FIG. 13, 14 and the element E can be assembled easily.

That is, by reducing the width on the outermost peripheral surface 13a side of the first split ring 13 and shortening the width on the innermost peripheral surface 14b side of the second split ring 14 as described above, as shown in FIG. In addition, the divided rings 13 and 14 can be easily overlapped with each other ((a) of FIG. 4). Specifically, when the second divided ring 14 is overlapped on the outer peripheral side of the first divided ring 13, the first divided ring 14 is not overlapped with the entire thickness T ₁ of the first divided ring 13. by superimposing a second split ring 14 on the opposing surface 13d of the ring 13, in a state superimposed their respective split rings 13 and 14 to one another, and narrower than the opening width W ₁ of the element E of the width of the ring R A state can be realized.

  When the second divided ring 14 that is overlapped on the outer peripheral side from the overlapped state is fitted into the inner peripheral side portion of the retaining portion 9 of the recess 7, each of the opposing surfaces 13 d and 14 d and the outermost periphery Interference between edges formed by the surface 13a and the innermost peripheral surface 14b can be avoided or suppressed ((b) of FIG. 4).

  Further, since the split rings 13 and 14 are formed as described above, the width of the split rings 13 and 14 can be easily increased by inserting the two rows of split rings 13 and 14 into the recess 7 of the element E. Can be increased. That is, when the split rings 13 and 14 are overlapped with each other and fitted into the recesses 7 of the element E, interference between the edge portions of the split rings 13 and 14 is avoided, and the recesses 7 are removed. The width of each of the split rings 13 and 14 can be increased by an amount corresponding to an increase in the margin when the second split ring 14 is fitted into the inner peripheral portion of the stopper 9. Therefore, for example, the width of the ring R can be extended, that is, the cross-sectional area of the ring R can be increased as compared with the rings r1 and r2 having the conventional configuration as shown in FIG. As a result, the strength or durability of the ring R can be improved, and as a result, the durability and power transmission capacity of the transmission belt V can be improved.

As described above, each of the split rings 13 and 14 is a so-called laminated ring, and is formed by laminating a plurality of endless annular strips (single rings) in the radial direction. Therefore, as shown in FIG. 5, for example, the first divided ring 13 includes, in order from the outermost peripheral side, a single ring 15 _a whose ring width is the width dimension L _a (that is, the width dimensions L ₂ and L ₅ ), and the ring width is the width. single ring 15b of dimension _{L b,} single ring 15c of the ring width is the width dimension _{L c,} single rings 15d of the ring width is the width _{L d,} single ring 15e, the ring width is the width of the ring width is the width _{L e} L _When six single rings of the single ring 15f of _f (that is, width dimensions L ₃ and L ₄ ) are laminated in the radial direction, the second divided ring 14 has a ring width in order from the outermost peripheral side. width _{L f} (that is, the width dimension _L 3, _{L 4)} of the single-ring 16a, the single ring 16b of the ring width is the width dimension _{L e,} single ring 16c, the ring width is the width _{L c} of the ring width is the width _{L d} Single ring 16d, ring A single ring 16e having a width L _{b and} a single ring 16f having a ring width L _a (that is, width L ₂ , L ₅ ) may be formed by laminating six single rings in the radial direction. . By doing so, the kind of single ring used for forming each division | segmentation ring 13 and 14 can be reduced as much as possible, and each division | segmentation ring 13 and 14 can be produced efficiently.

(Assembly example)
Next, an assembly example of the transmission belt V in the first embodiment will be described based on the drawings. When assembling the transmission belt V according to the present invention, as shown in FIG. 6, first, predetermined portions in the circumferential direction of the divided rings 13 and 14 arranged in parallel are overlapped with each other to set the overlapping state of the ring R. To do. By setting the overlapping state, in the ring R, the overlapping state (the state indicated by the A portion in FIG. 6) and the parallel state (the state indicated by the B portion in FIG. 6) are simultaneously set. The part of the overlapping state of the ring R, since the width of the ring R is narrower than the opening width W ₁ of the element E, the recess from the portion of the overlapping state, one or prearranged, predetermined number of elements E 7 is fitted with a ring R.

Subsequently, one or a plurality of elements E in which the overlapping portion of the ring R is fitted in the recess 7 are moved in the circumferential direction of the ring R to the parallel portion of the ring R. Since the width L _{1 of the} ring R is narrower than the opening width W _{2 of the} element E and wider than the opening width W _{1 of the} element E, the ring R is fitted into the recess 7 in the parallel portion of the ring R. When the element E is moved to the parallel portion of the ring R, the ring R is locked by the two retaining portions 8 and 9 of the concave portion 7 and engaged with the concave portion 7 in the parallel portion. That is, the element E and the ring R are assembled.

  Then, the above-described operation of fitting the ring R overlapped portion into the recesses 7 of the predetermined number of elements E and moving the predetermined number of elements E to the parallel portion of the ring R is sequentially repeated. .

  In the assembling work of the element E and the ring R as described above, in the initial stage of assembling the element E and the ring R, each of the split rings 13 and 14 can be freely operated, and the ring R can be relatively easily performed. Can be set. On the other hand, at the stage where the ring R and a relatively large number of elements E are assembled, that is, at the final stage of assembly, each divided ring is arranged by a row of elements E in which the dimples 11 and the holes 12 are fitted and connected. 13 and 14 are restricted, in other words, it becomes increasingly difficult to roll the element E, and as a result, it becomes increasingly difficult to set the overlapping state of the rings R.

  For example, when the two rows of split rings are two split rings r1 and r2 having a rectangular cross section and the same shape and dimensions as in the conventional configuration shown in FIG. In the final stage, it becomes difficult to set the divided rings in an overlapped state with each other, and interference occurs between the edge portions of the divided rings r1 and r2 that are overlapped with each other. There was a case.

  Therefore, in the method of assembling the transmission belt V according to the present invention, as the ring R to be assembled to the element E, interference between the edge portions of the overlapped portion as shown in FIG. The element E and the ring R can be easily and reliably formed by using the ring R composed of the two types of divided rings 13 and 14, that is, the first divided ring 13 and the second divided ring 14. It can be assembled.

  Specifically, as shown in FIG. 4, first, when the above-described ring R is put in an overlapped state, the second split ring 14 is overlapped on the outer peripheral side of the first split ring 13. That is, the first split ring 13 is configured such that the portion on the outermost peripheral surface 13a side of the facing surface 13d of the first split ring 13 and the portion on the innermost peripheral surface 14b side of the facing surface 14d of the second split ring 14 are in contact with each other. The ring 13 and the second divided ring 14 are overlapped.

  In this case, as described above, each of the split rings 13 and 14 is formed such that the width of the first split ring 13 is narrower on the outer peripheral side than the inner peripheral side, and conversely, the second split ring 14 is Since the inner circumferential side is narrower than the outer circumferential side, the divided rings r1 and r2 having the conventional configuration shown in FIG. These split rings 13 and 14 can be easily overlapped. Therefore, the rolling amount (that is, the rolling angle) when the element E is rolled in order to superimpose the divided rings 13 and 14 on each other can be reduced as compared with the conventional configuration shown in FIG.

  Of the divided rings 13 and 14 in the overlapped state, first, on the side surface 13c side opposite to the facing surface 13d of the first split ring 13 positioned on the inner peripheral side in the overlapped state. The end portion is fitted into the inner peripheral side portion of the retaining portion 8 in the concave portion 7 of the element E ((a) of FIG. 4). Then, after that, the end portion on the side surface 14c side opposite to the facing surface 14d of the second split ring 14 positioned on the outer peripheral side in the overlapped state is on the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E. It is inserted into the part ((b) of FIG. 4).

  Also in this case, the first split ring 13 is formed so that the width on the outer peripheral side is narrower than the inner peripheral side, and conversely, the second split ring 14 is on the inner peripheral side rather than the outer peripheral side. Since the width is formed to be narrow, the second split ring 14 is slid toward the retaining portion 9 side in the recess 7 of the element E, and the end portion on the side surface 14c side of the second split ring 14 is pulled out. When fitting into the inner peripheral side portion of the stopper 9, interference occurs at the edge portion of the overlapped portion, and an obstacle when inserting the second split ring 14 into the inner peripheral portion of the stopper 9 It is possible to avoid a situation in which the other side with which the edge part interferes or the other side is damaged.

  Thus, the assembly of the transmission belt V is completed by assembling the last element E and the ring R, that is, assembling all the desired elements E and the ring R.

  As described above, according to the transmission belt V and the assembling method thereof according to the first embodiment of the present invention, the two split rings 13 and 14 having the same circumferential length and different shapes, specifically, the outer circumference. Two split rings 13, a first split ring 13 formed so that the width becomes narrower toward the side, and a second split ring 14 formed so that the width becomes narrower toward the inner peripheral side, on the contrary. , 14 are used as the ring R assembled to the element E. When the two split rings 13 and 14 having different shapes are fitted into the recesses 7 of the element E and assembled, the two split rings 13 and 14 are arranged in order so that the assembly is easy. It fits into the inner peripheral side of both retaining portions 8 and 9 in the recess 7 of E. That is, first, the first split ring 13 is fitted on the inner peripheral side of the retaining portion 8 in the concave portion 7 of the element E, and then the second split ring 14 is inserted on the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E. It is inserted in.

  Therefore, when the two rows of the split rings 13 and 14 are overlapped with each other, the edge portion where the outermost peripheral surface 13a and the opposing surface 13d of the first split ring 13 located on the inner peripheral side are overlapped with each other. Interference with the edge portion where the innermost peripheral surface 14b of the second split ring 14 located on the outer peripheral side and the opposing surface 14d connect can be avoided or suppressed when combined. As a result, the ring R composed of the two rows of divided rings 13 and 14 and the element E can be assembled easily and reliably, and the assembly property of the transmission belt V can be improved.

(Second embodiment)
Next, the structure of the elements and rings constituting the transmission belt in the second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the ring R divided into two rows assembled to the element E is formed as a sloped surface in which the opposite surface facing one of the divided rings is formed as a sloped surface whose ring width becomes narrower toward the outer peripheral side. In contrast to this example, the ring 13 and the second split ring 14 formed as a sloped surface whose ring width increases toward the outer peripheral side of the opposing surface facing the other split ring are shown. In the second embodiment, a first split ring formed from a relatively narrow outer ring and an inner ring wider than the outer ring, and a relatively wide outer ring. An example is shown in which a ring R is constituted by a second split ring formed from a ring and an inner ring having a narrower width than the outer ring. Therefore, parts other than those related to these two types of split rings are the same as those shown in FIGS. 7 and 8 in FIGS. Reference numerals are assigned and detailed descriptions thereof are omitted.

In FIG. 7, the transmission belt V in the second embodiment includes an element E and a ring R including a first split ring 21 and a second split ring 22. Each of the split rings 21 and 22 constituting the ring R is formed of a metal laminated ring having the same material, strength, and circumferential length (specifically, the circumferential length of the innermost circumferential surface). Further, the width dimension L ₁ of the ring R, that is, the total width dimension L ₁ in a state where the divided rings 21 and 22 are arranged in parallel, is longer than the opening width W ₁ of the recess 7 of the element E, and is larger than the opening width W ₂ . Also, the shape and dimensions of each part are set so as to be a value within a short range.

  As shown in FIG. 8, each of the divided rings 21 and 22 has a different cross-sectional shape by a plane perpendicular to the circumferential direction of the ring R. That is, the first split ring 21 has a two-stage structure including a first outer layer ring 21a having a relatively narrow width and a first inner layer ring 21b having a width wider than the first outer layer ring 21a. On the other hand, the second split ring 22 has a two-stage structure including a second outer layer ring 22a having a relatively wide width and a second inner layer ring 22b having a narrower width than the second outer layer ring 22a.

Specifically, the first external ring 21a is itself a laminated ring, the thickness of the ring R with a thin thickness T ₃ than the thickness T _1, the width of the width L ₁ of the ring R half (L _1/2) is formed to be a rectangular cross-section that is narrower dimension L ₆ than. On the other hand, the first inner ring 21b is itself a laminated ring, with a thin thickness T ₄ than the thickness T ₁ of the ring R thickness, half width of the width L ₁ of the ring R (L _1/2) is formed to be a rectangular cross-section that is wider width L ₇ than.

  The first outer layer is formed on the outer peripheral side of the first inner layer ring 21b so that the side surfaces 21c and 21d of one of the first outer layer ring 21a and the first inner layer ring 21b (left side in FIG. 8) are located on the same plane. The ring 21a is laminated to form the first split ring 21. Therefore, one side surface 21e (the left side in FIG. 8) of the first split ring 21 is formed by the side surfaces 21c and 21d. Further, the other side surface (the right side in FIG. 8) of the first split ring 21, the opposing surface 21 f facing the second split ring 22 when the split rings 21 and 22 are arranged in parallel, is from the inner peripheral side to the outer peripheral side. It is formed in a two-step staircase shape that goes up.

On the other hand, the second external ring 22a is itself a laminate ring, with a thin thickness T ₃ than the thickness T ₁ of the ring R thickness, width half of the width dimension L ₁ of the ring R (L _1/2) is formed to be a rectangular cross-section that is wider width L ₈ than. The second inner ring 22b is itself a laminate ring, with a thin thickness T ₄ than the thickness T ₁ of the ring R thickness, width half of the width dimension L ₁ of the ring R (L _1/2) is formed to be a rectangular cross-section that is narrower dimension L ₉ than.

  Then, the second outer layer is formed on the outer peripheral side of the second inner layer ring 22b so that one of the second outer layer ring 22a and the second inner layer ring 22b (right side in FIG. 8) has side surfaces 22c and 22d located on the same plane. A ring 22a is laminated to form a second split ring 22. Therefore, the side surface 22e on one side (the right side in FIG. 8) of the second split ring 22 is formed by the side surfaces 22c and 22d. Further, the other side surface (the left side in FIG. 8) of the second split ring 22, the opposing surface 22 f facing the first split ring 21 when the split rings 21 and 22 are arranged in parallel, is from the inner peripheral side to the outer peripheral side. It is formed in a two-step staircase shape that descends toward.

Each of the split rings 21 and 22 has the same thickness T ₁ (that is, T ₃ + T ₄ ), and the width L ₆ of the first outer layer ring 21a and the second inner layer ring 22b. is formed with a width dimension L ₉ of such equal, it is formed similarly to the width L ₇ of the first outer layer ring 21b such that the width dimension L ₈ of the second external ring 22a is equal. Then, the width dimension _{L 9} between the width dimension _{L 7} of the width _{L 6} of the first outer layer ring 21a sum of the width dimension _{L 8} of the second outer ring 22a and the first inner ring 21b, the second inner ring 22b sum of all formed to have a width dimension L ₁ of the ring R.

Therefore, the concave and convex shapes of the opposing surfaces 21f and 22f of the divided rings 21 and 22 are point-symmetric with each other in a state where the divided rings 21 and 22 are arranged in parallel, and the first divided ring 21 and the second divided ring 22 are. When these are arranged in parallel, the opposing surfaces 21f and 22f are fitted into each other and come into contact with each other. Therefore, by arranging the first divided ring 21 and the second divided ring 22 in parallel, a ring R having a rectangular cross section with a width dimension of L ₁ and a thickness of T ₁ is formed.

  In this way, each of the split rings 21 and 22 has a two-stage structure including the outer layer rings 21a and 22a and the inner layer rings 21b and 22b, and the opposing surfaces 21f and 22f are fitted to each other. The two split rings r1 and r2 having a rectangular cross section and the same shape and dimensions are overlapped with each other according to the conventional configuration as shown in FIG. Compared with the case where they are combined, the ring R, that is, the two divided rings 21 and 22 and the element E can be easily assembled.

That is, as described above, the width of the upper stage side (that is, the outer peripheral side) of the first split ring 21 having the two-stage structure is shortened, and the width of the lower stage side (that is, the inner peripheral side) of the second split ring 22 is shortened. Thus, the divided rings 21 and 22 can be easily overlapped with each other. Specifically, when the second divided ring 22 is overlapped on the outer peripheral side of the first divided ring 21, the first divided ring 22 is not overlapped with the entire thickness T ₁ of the first divided ring 21. by superimposing by a thickness T ₄ minutes of the first inner ring 21b of the ring 21, in a state superimposed their respective split rings 21 and 22 to each other, narrower than the opening width W ₁ of the element E of the width of the ring R Can be realized.

  As the split rings 21 and 22 are easily overlapped with each other as described above, the second split ring 22 stacked on the outer peripheral side from the overlapped state is recessed. 7, when fitted to the inner peripheral side portion of the retaining portion 9, the edge portions of the opposing surfaces 21 f and 22 f, specifically, the edge portion on the outer peripheral side of the first outer layer ring 21 a on the opposing surface 21 f The interference with the inner peripheral edge portion of the second inner layer ring 22b on the facing surface 22f can be avoided or suppressed.

  In addition, since the split rings 21 and 22 are formed as described above, the width of the split rings 21 and 22 can be easily increased by inserting the two rows of split rings 21 and 22 into the recess 7 of the element E. Can be increased. That is, when the split rings 21 and 22 are put on top of each other and fitted into the recesses 7 of the element E, interference between the edge portions of the split rings 21 and 22 is avoided, and The width of each of the split rings 21 and 22 can be increased by an increase in the margin when the second split ring 22 is fitted into the inner peripheral portion of the stopper 9. Therefore, for example, the width of the ring R can be extended, that is, the cross-sectional area of the ring R can be increased as compared with the rings r1 and r2 having the conventional configuration as shown in FIG. As a result, the strength or durability of the ring R can be improved, and as a result, the durability and power transmission capacity of the transmission belt V can be improved.

(Assembly example)
Next, an assembly example of the transmission belt V in the second embodiment will be described. The transmission belt V in the second embodiment can be assembled in the same manner as the transmission belt V in the first embodiment described above. That is, in the method of assembling the transmission belt V in the second embodiment, the ring R to be assembled to the element E is formed so as to avoid interference between the edge portions of the overlapping portions when setting the overlapping state. By using the two types of split rings 21 and 22, that is, the ring R composed of the first split ring 21 and the second split ring 22, the element E and the ring R can be assembled easily and securely. It is like that.

  Specifically, first, when the ring R is put in an overlapped state, the second split ring 22 is overlapped on the outer peripheral side of the first split ring 21. That is, a portion of the first inner ring 21b on the opposing surface 21f side of the outermost peripheral surface of the first inner ring 21b, and a portion of the innermost surface of the second inner layer ring 22b on the opposing surface 22f side of the first inner ring 21b. The first split ring 21 and the second split ring 22 are overlapped so that the two come into contact with each other.

In this case, as described above, the second split ring 22 does not have to be overlapped with the entire thickness T ₁ of the first split ring 21, that is, the second split ring 22 is the first inner layer ring 21 b of the first split ring 21. for it Kasanere by the thickness T ₄ minutes, as compared with the case of the overlapping state of the split ring r1, r2 of the conventional configuration shown in FIG. 12 described above facilitates their respective split rings 21 and 22 Can be overlaid. Therefore, the rolling amount (that is, the rolling angle) when the element E is rolled in order to overlap the divided rings 21 and 22 with each other is smaller than that of the conventional configuration shown in FIG.

  Of the divided rings 21 and 22 in the overlapped state, first, the side surface 21e side opposite to the facing surface 21f of the first split ring 21 positioned on the inner peripheral side in the overlapped state is provided. The end portion is fitted into the inner peripheral side portion of the retaining portion 8 in the concave portion 7 of the element E. After that, the end portion on the side surface 22e side opposite to the facing surface 22f of the second split ring 22 positioned on the outer peripheral side in the overlapped state is on the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E. Fit into the part.

  Also in this case, the opposing surface 21f of the first split ring 21 is formed in a stepped shape whose width on the outer peripheral side is narrower than the inner peripheral side, and conversely, the opposing surface 22f of the second split ring 22 is Since the inner peripheral side is formed in a stepped shape with a narrower width than the outer peripheral side, the second split ring 22 is slid toward the retaining portion 9 side in the concave portion 7 of the element E, so that the second When the end portion on the side surface 22e side of the split ring 22 is fitted into the inner peripheral side portion of the retaining portion 9, interference occurs at the edge portion of the overlapped portion, and the second split ring 22 is retained by the retaining portion 9 It is possible to avoid a situation in which it becomes an obstacle when inserted into the inner peripheral side portion, or the other side where the edge portion interferes is damaged.

  Thus, the assembly of the transmission belt V is completed by assembling the last element E and the ring R, that is, assembling all the desired elements E and the ring R.

  As described above, according to the transmission belt V and the assembling method thereof according to the second embodiment of the present invention, the ring R divided into two rows is located on the inner peripheral side and has a relatively wide first inner layer. The first split ring 21 having a two-stage structure of the ring 21a and the first outer layer ring 21a narrower than the first inner layer ring 21b and positioned on the outer peripheral side, and on the contrary, positioned on the inner peripheral side A second split ring 22 having a two-stage structure including a second inner layer ring 22b having a relatively narrow width and a second outer layer ring 22a positioned on the outer peripheral side and wider than the second inner layer ring 22b; The two split rings 21 and 22 are configured.

  Therefore, when these two split rings 21 and 22 are fitted into the concave portion 7 of the element E and assembled, the first split ring 21 is first fitted on the inner peripheral side of the retaining portion 8 in the concave portion 7 of the element E, When the second divided ring 22 is fitted into the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E afterward, the two divided rings 21 and 22 are overlapped with each other. Interference between the edge portion where the outer peripheral surface of the ring 21 and the opposing surface 21f connect and the edge portion where the inner peripheral surface of the second split ring 22 and the opposing surface 22f connect can be avoided or suppressed. As a result, it is possible to easily and reliably assemble the ring R including the two rows of the divided rings 21 and 22 and the element E, and to improve the assembling property of the transmission belt V.

(Third embodiment)
Next, the structure of the elements and the rings constituting the transmission belt in the third embodiment of the present invention will be described with reference to FIGS. In the first and second embodiments, the ring R divided into two rows assembled to the element E is formed such that the outer peripheral side in the thickness direction is narrower than the inner peripheral side, respectively. In contrast to the third embodiment, the split ring and the second split ring formed such that the inner peripheral side in the thickness direction is narrower than the outer peripheral side are shown. An example is shown in which a ring R is constituted by a narrow split ring having a relatively narrow width and a wide split ring having a width wider than that of the narrow split ring. Accordingly, parts other than those related to these two types of split rings are the same as those in the first and second embodiments shown in FIGS. 1 to 5, 7, and 8. The same reference numerals as those in FIGS. 1 to 5, 7, and 8 are attached, and detailed description thereof is omitted.

In FIG. 9, the transmission belt V in the second embodiment is composed of an element E and a ring R including a narrow split ring 31 and a wide split ring 32. Of these, each of the split rings 31 and 32 constituting the ring R is formed of a metal laminated ring having the same material, strength, and circumferential length (specifically, the circumferential length of the innermost circumferential surface). Further, the width dimension L ₁ of the ring R, that is, the total width dimension L ₁ in a state where the divided rings 31 and 32 are arranged in parallel, is longer than the opening width W ₁ of the recess 7 of the element E and is larger than the opening width W ₂ . Also, the shape and dimensions of each part are set so as to be a value within a short range.

Each of the split rings 31 and 32 is formed of a metal laminated ring having the same material, strength, and circumferential length (specifically, the circumferential length of the innermost circumferential surface). Further, the width dimension L ₁ of the ring R, that is, the total width dimension L ₁ in a state where the divided rings 31 and 32 are arranged in parallel, is longer than the opening width W ₁ of the recess 7 of the element E and is larger than the opening width W ₂ . Also, the shape and dimensions of each part are set so as to be a value within a short range.

Specifically, as shown in FIG. 10, each of the split rings 31 and 32 has a different cross-sectional shape by a plane perpendicular to the circumferential length direction of the ring R. That is, the narrow split ring 31 has a thickness of thickness T _1, is relatively narrow, specific half of the width dimension L ₁ of the ring R in the (L _1/2) narrow width than L It is formed to have a rectangular cross section of ₁₀ . On the other hand, the wide split ring 32 has a thickness of thickness _{T 1,} is relatively wide, in particular half of the width dimension _{L 1} of the ring R _(L 1/2) wider than the width _{L 11} It is formed to have a rectangular cross section.

Then, the sum of the width dimension L ₁₁ of width L ₁₀ and the wide split ring 32 of the narrow split ring 31 is formed to have a width dimension L ₁ of the ring R. Therefore, the width dimension is L ₁ and the thickness is T ₁ by bringing the narrow split ring 31 and the wide split ring 32 in parallel by bringing the opposing surfaces 31d and 32d of the split rings 31 and 32 into contact with each other. A ring R having a rectangular cross section is formed.

Here, as the width _{L 11} of the wide split ring 32 is at least 1.5 times the width _{L 10} of the narrow split ring 31, preferably, a width dimension _{L 10} of the narrow split ring 31 elements E is longer than the length of the engagement portion on the inner peripheral side of the retaining portion 8 in the recess 7 (ie, (W ₁ −W ₂ ) / 2), and the width dimension L ₁₁ of the wide split ring 32 is narrowly divided. as a length within the range from 1.8 times of the order of 2.5 times the width _{L 10} of the ring 31, the split ring 31 and 32 each width _{L 10, L 11} are set are formed respectively ing.

  Thus, by providing an appropriate difference in the width of each of the split rings 31 and 32 and making each of the split rings 31 and 32 different in shape, the cross-sections of the conventional configuration as shown in FIG. The ring R, that is, the two rows of the split rings 31 and 32, and the element E can be easily assembled as compared with the case where two rectangular split rings r1 and r2 having the same shape and size are overlapped with each other.

  That is, by reducing the width of the narrow split ring 31 as described above, each split ring 31, 32 is inserted into the recess 7 of the element E as shown in FIG. The rings 31 and 32 can be easily overlapped with each other ((a) of FIG. 11). Then, when the wide divided ring 32 overlapped on the outer peripheral side from the overlapped state is fitted into the inner peripheral side portion of the retaining portion 9 of the recess 7, Interference between the edge portion connected to the outer peripheral surface 31a and the edge portion connected to the opposing surface 32d of the wide split ring 32 and the innermost peripheral surface 32b can be avoided or suppressed ((b) of FIG. 11). .

Further, as described above, each of the split rings 31 and 32 is formed with a difference between the width dimensions L ₁₀ and L ₁₁ , so that the two rows of the split rings 31 and 32 to the concave portion 7 of the element E are formed. The width of each of the split rings 31 and 32 can be increased by the ease of insertion. That is, when the split rings 31 and 32 are overlapped with each other and fitted into the recesses 7 of the element E, the interference between the edge portions of the split rings 31 and 32 is avoided, and the recesses 7 are removed. The width of each of the split rings 31 and 32 can be increased by an amount corresponding to an increase in the margin when the wide split ring 32 is fitted into the inner peripheral side portion of the stopper 9. Therefore, for example, the width of the ring R can be extended, that is, the cross-sectional area of the ring R can be increased as compared with the rings r1 and r2 having the conventional configuration as shown in FIG. As a result, the strength or durability of the ring R can be improved, and as a result, the durability and power transmission capacity of the transmission belt V can be improved.

(Assembly example)
Next, an assembly example of the transmission belt V in the third embodiment will be described. The transmission belt V in the third embodiment can also be assembled in the same manner as the transmission belt V in the first and second embodiments described above. That is, in the method of assembling the transmission belt V in the third embodiment, as the ring R to be assembled to the element E, two types of split rings 31 and 32 formed by providing a difference in the mutual width dimensions L ₁₀ and L _11. That is, by using the ring R configured by the narrow split ring 31 and the wide split ring 32, the element E and the ring R can be assembled easily and reliably.

  Specifically, first, when the ring R is put in an overlapped state, the wide split ring 22 is overlapped on the outer peripheral side of the narrow split ring 31. That is, the narrow split ring 31 so that the portion on the facing surface 31d side of the outermost peripheral surface 31a of the narrow split ring 31 and the portion on the facing surface 32d side of the innermost peripheral surface 32b of the wide split ring 32 are in contact with each other. 31 and the wide dividing ring 32 are overlapped.

  In this case, since each of the split rings 31 and 32 is formed so that the narrow split ring 31 has a relatively narrow width as described above, the split ring having the conventional configuration shown in FIG. Compared with the case where r1 and r2 are put into an overlapped state, each of the divided rings 31 and 32 can be easily put into a stacked state with the divided rings 31 and 32 inserted into the recesses 7 of the element E. can do. Therefore, the rolling amount (that is, the rolling angle) when the element E is rolled in order to superimpose the divided rings 31 and 32 on each other is smaller than that of the conventional configuration shown in FIG.

  Of the divided rings 31 and 32 in the overlapped state, first, on the side surface 31c side opposite to the facing surface 31d of the narrow divided ring 31 positioned on the inner peripheral side in the overlapped state. The end portion is fitted into a portion on the inner peripheral side of the retaining portion 8 in the concave portion 7 of the element E ((a) of FIG. 11). After that, the end on the side surface 32c opposite to the facing surface 32d of the wide split ring 32 positioned on the outer peripheral side in the overlapped state is a portion on the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E. (Fig. 11 (b)).

  Also in this case, since the narrow split ring 31 is formed so as to be relatively narrow, the wide split ring 32 is slid toward the retaining portion 9 side in the concave portion 7 of the element E to increase the width. When the end portion on the side surface 32c side of the split ring 32 is fitted into the inner peripheral side portion of the retaining portion 9, interference occurs at the edge portion of the overlapped portion, and the wide split ring 32 is removed from the retaining portion 9 It is possible to avoid a situation where it becomes an obstacle when inserted into the inner peripheral side portion or damage is caused to the other side where the edge part interferes.

  Thus, the assembly of the transmission belt V is completed by assembling the last element E and the ring R, that is, assembling all the desired elements E and the ring R.

  As described above, according to the transmission belt V and the assembling method thereof according to the third embodiment of the present invention, the rings R divided into two rows are both equal in circumference and rectangular in cross section, and relatively The split ring 31 is composed of two split rings 31 and 32, which are a narrow split ring 31 having a narrow width and a wide split ring 32 having a width wider than the narrow split ring 31. Therefore, when these two split rings 31 and 32 are fitted into the recess 7 of the element E and assembled, the narrow split ring 31 is first fitted into the inner peripheral side of the retaining portion 8 in the recess 7 of the element E, By inserting the wide split ring 32 into the inner peripheral side of the retaining portion 9 in the concave portion 7 of the element E later, the wide split ring 32 is inserted deeper into the space on the inner peripheral side of the retaining portion 9 of the concave portion 7. Can do.

  Therefore, in a state where the wide split ring 32 to be fitted later is closer to the element E, in other words, in a state where the angle formed by the width direction of the wide split ring 32 and the width direction of the element E is smaller, the wide split ring 32 can be fitted into the inner peripheral side of the retaining portion 9 of the recess 7. For this reason, the split rings 31 and 32 are fitted on the inner peripheral sides of the both retaining portions 8 and 9 of the recess 7 without overlapping each other or slightly overlapping each other. It is possible to avoid or suppress interference between the edge portions of the divided rings 31 and 32 facing each other. As a result, the ring R composed of the two rows of split rings 31 and 32 and the element E can be assembled easily and reliably, and the assembly property of the transmission belt V can be improved.

  The present invention is not limited to the specific examples described above. That is, in the first embodiment and the second embodiment, the cross-sectional shape of the first split rings 13 and 21 and the cross-sectional shape of the second split rings 14 and 22 are point-symmetric, in other words, the first Although the cross-sectional area of the division | segmentation rings 13 and 21 and the cross-sectional area of the 2nd division | segmentation rings 14 and 22 are shown, these each 1st division | segmentation ring 13 and 21 and each 2nd division | segmentation ring 14 and 22 are shown. Each means that their cross-sectional shapes are not point-symmetric or their cross-sectional areas are not equal. For example, in the narrow split ring 31 and the wide split ring 32 provided with a difference in mutual width dimension (or cross-sectional area) shown in the third embodiment, the opposing surfaces 31d that face each other when they are arranged in parallel. , 32d can be formed like the opposing surfaces 13d, 14d of the first dividing rings 13, 14 or the opposing surfaces 21f, 22f of the dividing rings 21, 22 of the second embodiment. .

  Further, although the transmission belt of the present invention is used in a belt-type continuously variable transmission, the transmission belt of the present invention is not limited to a belt-type continuously variable transmission, and includes a belt and a pulley. The present invention can also be applied to a transmission belt of another winding transmission device.

It is a schematic diagram which shows the structure in 1st Example of the transmission belt which concerns on this invention, Comprising: It is a front view of the transmission belt. It is a schematic diagram which shows the structure in 1st Example of the transmission belt which concerns on this invention, Comprising: It is a partial sectional side view of the transmission belt. It is a schematic diagram which shows the structure of the ring in 1st Example of the transmission belt which concerns on this invention. It is a schematic diagram for demonstrating the assembly | attachment state of the element and ring in 1st Example of the transmission belt which concerns on this invention. It is a schematic diagram for demonstrating the detailed structure of the ring in 1st Example. It is a schematic diagram for demonstrating the state which piled up the state which comprised the ring which comprises the transmission belt of this invention, and the parallel. It is a schematic diagram which shows the structure in 2nd Example of the transmission belt which concerns on this invention, Comprising: It is a front view of the transmission belt. It is a schematic diagram which shows the structure of the ring in 2nd Example of the transmission belt which concerns on this invention. It is a schematic diagram which shows the structure in 3rd Example of the transmission belt which concerns on this invention, Comprising: It is a front view of the transmission belt. It is a schematic diagram which shows the structure of the ring in 3rd Example of the transmission belt which concerns on this invention. It is a schematic diagram for demonstrating the assembly | attachment state of the element and ring in 3rd Example of the transmission belt which concerns on this invention. It is a schematic diagram for demonstrating the assembly | attachment state of the element and ring in the transmission belt by the conventional structure. It is a schematic diagram for demonstrating the other assembly | attachment state of the element and ring in the transmission belt by the conventional structure.

Explanation of symbols

  E ... element, R ... ring, V ... transmission belt, 3 ... main body (base part), 4 ... pulley, 5a, 6a ... inner surface, 7 ... recess, 8, 9 ... retaining part, 10 ... locking edge, 13, 21 ... 1st split ring, 14, 22 ... 2nd split ring, 21a ... 1st outer layer ring, 21b ... 1st inner layer ring, 22a ... 2nd outer layer ring, 22b ... 2nd inner layer ring, 31 ... Narrow Split ring, 32 ... Wide split ring.

Claims (10)

A recess for accommodating two endless rings in parallel, and a retaining portion that prevents the detachment by engaging the two rows of rings with the open end sides of the left and right inner surfaces of the recess. Are arranged in a ring shape so that the opening end side is on the outer peripheral side, and the two rows of rings are arranged on the inner peripheral side of the both retaining portions in the row of elements arranged in the ring shape. In the transmission belt fitted and assembled,
The two rows of rings are constituted by two types of split rings having the same circumference and different shapes.   The two rows of rings are accommodated in the recess in parallel with the first divided ring, the first divided ring having an outer peripheral side in the thickness direction that is narrower than the inner peripheral side, and the outer peripheral side from the inner peripheral side. The transmission belt according to claim 1, further comprising a second divided ring having a wider width.   The two rows of rings are formed of a first outer layer ring having a relatively narrow width and a first inner layer ring that is disposed on an inner peripheral side of the first outer layer ring and is wider than the first outer layer ring. The first divided ring and the first divided ring are housed in the recess in parallel with the first divided ring, and are disposed on the inner peripheral side of the second outer layer ring having a relatively wide width and the second outer layer ring. 2. The power transmission belt according to claim 1, further comprising a second split ring formed of a second inner layer ring having a width smaller than that of the second outer layer ring.   The two rows of rings include a narrow split ring having a relatively narrow width, and a wide split ring that is accommodated in the recess in parallel with the narrow split ring and wider than the narrow split ring. The power transmission belt according to claim 1, wherein the power transmission belt is included.   The transmission belt according to claim 4, wherein the wide split ring includes a split ring that is at least 1.5 times wider than the narrow split ring. A recess for accommodating two endless rings in parallel, and a retaining portion that prevents the detachment by engaging the two rows of rings with the open end sides of the left and right inner surfaces of the recess. Are arranged in a ring shape so that the opening end side is on the outer peripheral side, and the two rows of rings are arranged on the inner peripheral side of the both retaining portions in the row of elements arranged in the ring shape. In the assembly method of the transmission belt to be fitted and assembled,
The two rows of rings are composed of two types of split rings having the same circumference and different shapes.
One of the divided rings is fitted on the inner peripheral side of one of the retaining portions, and then the other divided ring is fitted and assembled on the inner peripheral side of the other retaining portion. Assembling the transmission belt. The two rows of rings are accommodated in the recess in parallel with the first divided ring, the first divided ring having an outer peripheral side in the thickness direction that is narrower than the inner peripheral side, and the outer peripheral side from the inner peripheral side. Including a wide second split ring,
The first divided ring is fitted on the inner peripheral side of one of the retaining portions, and then the second divided ring is fitted and assembled on the inner peripheral side of the other retaining portion. Item 7. A method for assembling the transmission belt according to Item 6. The two rows of rings are formed of a first outer layer ring having a relatively narrow width and a first inner layer ring that is disposed on an inner peripheral side of the first outer layer ring and is wider than the first outer layer ring. The first divided ring and the first divided ring are housed in the recess in parallel with the first divided ring, and are disposed on the inner peripheral side of the second outer layer ring having a relatively wide width and the second outer layer ring. A second split ring formed from a second inner layer ring that is narrower than the second outer layer ring,
The first divided ring is fitted on the inner peripheral side of one of the retaining portions, and then the second divided ring is fitted and assembled on the inner peripheral side of the other retaining portion. Item 7. A method for assembling the transmission belt according to Item 6. The two rows of rings include a narrow split ring having a relatively narrow width, and a wide split ring that is accommodated in the recess in parallel with the narrow split ring and wider than the narrow split ring. Including
The narrow divided ring is fitted on the inner peripheral side of one of the retaining portions, and then the wide divided ring is fitted and assembled on the inner peripheral side of the other retaining portion. 6. A method for assembling the transmission belt according to 6.   The method for assembling a transmission belt according to claim 9, wherein the wide split ring includes a split ring that is at least 1.5 times wider than the narrow split ring.

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