JP2009204103A - Belt for continuously variable transmission, its assembling method and its element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently manufacture or assemble a belt using an element with a slipping-out preventive part of a ring, arranged on both right and left sides. <P>SOLUTION: This element 6 has at least two saddle surfaces 10a, 10b and 10c having a step height for arranging rings 9a, 9b and 9c between both right-left side surfaces 6A connecting with pulleys 2 and 3. The ring 9 has at least two kinds of mutually fittable rings 9a, 9b and 9c having the peripheral length mutually different in a central part in the thickness direction. The ring 9c having the short peripheral length is also arranged on the saddle surface 10c in a relatively low part of the saddle surfaces having the step height, and the rings 9a and 9b having the long peripheral length are arranged on the saddle surfaces 10a and 10b in a relatively high part of the saddle surfaces having the step height. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt for a continuously variable transmission configured by arranging a large number of plate-like elements facing each other in an annular manner, and binding these elements by an endless annular ring, an assembling method thereof, and an element. Is.

  As a belt used in a continuously variable transmission for a vehicle, a large number of metal pieces called blocks or elements are arranged in an annular shape, and these metal pieces are endless carriers (sometimes called rings or hoops). The thing of the structure united by is known. This type of belt is configured to transmit torque by the pressing force between the metal pieces arranged in contact with each other, and the metal piece sandwiched in the winding groove in the pulley on the driving side, When the pulley rotates, the metal piece is sequentially pushed out from the winding groove to press the preceding metal piece, and the metal piece thus advanced advances into the winding groove in the driven pulley, so that the metal piece advances. Along with this, torque is transmitted to the driven pulley.

  An example of such a belt is described in Patent Document 1. The belt described in Patent Document 1 is configured in an annular shape as a whole by bundling a number of substantially trapezoidal blocks with two endless carriers each having an annular shape. FIG. 9 shows the shape of the block 100. The block 100 shown here is annularly arranged so that the short side is the inner peripheral side, and the left and right sides 101 and 102 in the arrangement state are tapered inner surfaces of a V-shaped winding groove in a pulley (not shown). Inclined corresponding to. Further, a saddle surface 104 around which the endless carrier 103 is wound is formed at substantially the center in the vertical direction and the width direction. The saddle surface 104 is formed to have a width equal to or larger than the width of the two endless carriers 103 arranged side by side in the width direction.

  Furthermore, in order to prevent the endless carrier 103 from slipping out of the saddle surface 104, in other words, locking portions 105 and 106 for preventing the block 100 from coming off the endless carrier 103 are provided. These locking portions 105, 106 cover the left and right side portions of the saddle surface 104 or the upper sides of the left and right side portions of the endless carrier 103 placed on the saddle surface 104, and rise on both the left and right sides of the saddle surface 104. In addition, it is an inverted L-shaped portion, and the gaps 105 and 106 are open to form an opening 107 for the saddle surface 104. Furthermore, convex portions 108 and 109 having a circular cross section are formed at two positions on the left and right sides of one surface (for example, the front surface) of the locking portions 105 and 106, and on the surface opposite to the convex portions 108 and 109. A recess (not shown) for fitting the protrusions 108 and 109 is formed.

JP 2000-205342 A

  As described above, the endless carrier that binds the blocks, which are metal pieces arranged in an annular shape, not only contacts the saddle surface and binds the blocks, but also pulls out the blocks from the winding groove in the pulley. Therefore, as described in Patent Document 1, a locking portion is essential. Therefore, in the belt having the structure in which the two endless carriers described above are arranged adjacent to each other, since the carrier is endless, the interval between the engaging portions, that is, the width of the opening is the width in which the endless carriers are arranged in parallel. It will be narrower. Therefore, since it is impossible to fit the block into the two endless carriers arranged side by side in the width direction, it is necessary to assemble the block to the endless carrier with some contrivance. No structure or method has been developed for assembling these blocks to an endless carrier.

  The present invention has been made paying attention to the technical problem described above, and improves the manufacturability or assemblability of a continuously variable transmission belt having a structure in which a ring is arranged in the central portion in the width direction to bind elements. The purpose is to make it.

  In order to achieve the above object, the invention of claim 1 is configured by binding a large number of plate-like elements arranged in an annular shape with a uniform posture by a ring, and the center of the elements in the width direction. A saddle surface for arranging the ring is provided at the portion, and a left-and-right both sides sandwiching the saddle surface are provided with retaining portions that protrude upward from the saddle surface and cover the side edges of the ring on the saddle surface. In the continuously variable transmission belt, the left and right retaining portions are separated from each other, and the distance between the retaining portions is smaller than the width of the entire ring arranged in the width direction on the saddle surface. Has at least two saddle surfaces with a step between the left and right side surfaces contacting the pulley, and the rings have different circumferential lengths at the center in the thickness direction. The ring includes at least two types of rings that can be fitted to each other, the ring having a short circumference is disposed on a saddle surface of a relatively low portion of the saddle surface having the step, and the ring having a long circumference The saddle surface is arranged on a relatively high saddle surface of the stepped saddle surfaces.

  The invention according to claim 2 is a saddle surface in which a large number of plate-like elements arranged in an annular shape with the same posture are bound by a ring, and the ring is arranged at the center in the width direction of the element Are provided on both the left and right sides of the saddle surface, and provided with retaining portions that project upward from the saddle surface to cover the side edges of the ring on the saddle surface, and the left and right retaining portions are separated from each other. In the assembling method of the continuously variable transmission belt in which the spacing between the retaining portions is smaller than the width of the entire ring arranged in the width direction on the saddle surface, the postures are aligned and arranged in an annular shape. Arranged on the outer peripheral side of the multiple elements in a state where at least two types of rings having different circumferential lengths in the central portion in the thickness direction are mutually fitted, and at least fitted to each other The ring of the kind arranged in an annular shape is made relatively close to the stepped saddle surface, and the inner ring having a short circumference is connected to the saddle surface of the lower portion of the stepped saddle surface. And then, the ring on the outer peripheral side having a long peripheral length is moved in the width direction so as to be stored in the saddle surface of the relatively high portion of the saddle surface having the step.

  According to a third aspect of the present invention, in the method of the second aspect, the at least two types of rings and the elements that are fitted to each other are relatively translated in parallel with the saddle surface, so that the ring having a short peripheral length is provided. Is placed on the saddle surface of the relatively low portion, and the ring having a long circumference is moved in the width direction thereof so that one side of the ring is provided on the side of the element. And a saddle surface.

  According to a fourth aspect of the present invention, there is provided the method according to the second aspect, wherein either side of at least two types of rings in which a hook-shaped retaining portion formed on one side of the element is fitted to each other. Engaged with each other and then mated together by rotating the elements about any of the side edges to bring the saddle surface of the element closer to the at least two types of rings. A ring is passed between the retaining portions of the element and disposed on the saddle surface, and the inner peripheral ring having a short circumference is a saddle surface at a relatively low portion of the saddle surface having a step. It is the method characterized by storing.

  According to a fifth aspect of the present invention, in the belt of the first aspect or the method of any of the second to fourth aspects, the circumferential length of the outer peripheral surface of the ring having the short peripheral length is the circumference of the inner peripheral surface of the ring having the long peripheral length It is an assembly method of a continuously variable transmission belt characterized by being not longer than the length.

  The invention of claim 6 is in the form of a plate piece in which the left and right side surfaces are torque transmitting surfaces that come into contact with the pulley, and a saddle surface for arranging the belt is formed at the center in the width direction, and On both the left and right sides of the saddle surface, there are provided retaining portions that project upward from the saddle surface to cover the side edges of the ring on the saddle surface, and the left and right retaining portions are separated from each other, and these retaining portions In the element of the belt for continuously variable transmission, the distance between each other is smaller than the width of the entire ring arranged in the width direction on the saddle surface. A first saddle surface of a relatively low portion for disposing a ring having a short circumference among at least two types of rings that are different in length and can be fitted to each other, and adjacent to the first saddle surface with a step And said Is an element which is characterized in that it comprises a second saddle surface of the relatively high portion for placing a long ring lengths.

  According to the first aspect of the present invention, the saddle surfaces of the elements arranged in an annular shape and bound are provided with at least two saddle surfaces having a step, and correspondingly, at the central portion in the thickness direction. At least two types of rings having different circumferences (so-called average circumferences) are provided. Since these rings can be fitted to each other, the overall width of the ring is reduced in a so-called nested state. Those rings can be inserted into the saddle surface. Since the ring with a short average circumference fits on the saddle surface of the relatively low part, and the ring with a long average circumference in that state is at the same radial position (position of height) as the saddle surface of the relatively high part, By moving the ring in the width direction, the ring is disposed and accommodated on a relatively high saddle surface. In this state, one side edge portion of the ring having a long average circumference enters the inside of the locking portion and is prevented from coming off.

  In addition, since a part of side edges of the rings that are close to each other interfere with each other, the rings do not return in a nesting shape. Since it does not bend completely to the same shape, interference between the side edges does not occur and the state of being fitted to each other is not restored. Further, in a state where tension is applied to each ring, the respective saddle surfaces are strongly brought into frictional contact with each other, and therefore, there is no movement in the width direction and no return to the mutually fitted state. In this way, it becomes possible to assemble the element and the ring without deforming such as twisting the row of elements arranged in a ring or each ring, thereby improving the manufacturability or assemblability of the belt. it can. Further, since it is possible to prevent the element from dropping off from the assembled belt, the handling of the belt is facilitated.

  According to invention of Claim 2, two types of rings were mutually fitted so that the whole width | variety in the state arrange | positioned in parallel might become smaller than the width | variety of the opening part between the securing parts in an element. As a result, the substantial width of the rings before assembly is narrower than the opening, so that these rings can be easily inserted and arranged on the saddle surfaces of the annularly arranged elements. Further, among the rings inserted on the saddle surface side, a ring having a long average circumference is moved in the width direction so as to be accommodated in a relatively high saddle surface, so that the assembly is facilitated.

  In particular, according to the invention of claim 3, since the element and the ring can be assembled to the ring of elements arranged in a ring and each ring without applying deformation such as twisting, the belt can be manufactured or assembled efficiently. Can do.

  On the other hand, according to the invention of claim 4, one side edge portion of at least two types of rings fitted to each other is inserted inside one of the retaining portions of the element, and the insertion portion is centered. As the element is rotated and the other side edge of the ring is inserted into the saddle surface side, even if the width of at least two types of rings fitted together is wider than the opening width of the element, The ring can be inserted into the saddle surface side by making effective use of the space. In other words, the fitting allowance of each ring can be reduced.

  According to the invention of claim 5, each ring can be easily fitted, and after being placed on the saddle surface, the side edges of the respective rings interfere with each other to ensure movement in the width direction. Can be blocked. As a result, it is possible to prevent the element from dropping off from the assembled belt, and the handling of the belt is facilitated.

  According to the invention of claim 6, by using in combination with at least two types of rings having different circumferential lengths at the center in the thickness direction and capable of being fitted to each other, it is a continuously variable product with good manufacturability or assemblability. A transmission belt can be obtained, and the working efficiency of its manufacture or assembly can be improved.

  Next, the present invention will be described more specifically. First, the belt that is the subject of the present invention will be described. The belt that is the subject of the present invention is used in, for example, a continuously variable transmission, and has a V-shaped cross section formed on the outer peripheral portion of the pulley. As a result, the torque is transmitted by the friction force generated between the groove and the pulley. An example thereof is schematically shown in FIG. 2, and the belt 1 is wound around a driving pulley 2 and a driven pulley 3 constituting a continuously variable transmission. Each of these pulleys 2 and 3 has a fixed sheave and a movable sheave each provided with a tapered surface so as to face each other, thereby forming a winding groove 4 having a V-shaped cross section between these sheaves. The movable sheave is configured to change the width of the winding groove 4 by moving the movable sheave back and forth with respect to the fixed sheave by an actuator 5 such as a hydraulic cylinder.

  The belt to be used in the present invention used in this manner is formed by annularly binding a number of elements with a ring so that the entire belt has an annular shape and both side surfaces are V-shaped or tapered. ing. An example of the element 6 constituting the belt 1 shown in FIG. 2 is shown in FIG. 1 as a cross-sectional view of the belt 1. This element 6 is a metal plate piece that is formed so that both left and right side surfaces are parallel to the inner surface of the winding groove 4 and has both side surfaces as a torque transmission surface 6A, and has the same shape and dimensions. They are arranged in a ring with their postures aligned. In order to maintain the vertical and horizontal relative positions of the elements 6 in the aligned state, a convex portion called a dimple 7 and a concave portion called a hole (not shown) in which the dimple 7 is loosely fitted. Are formed at one location on both the front and back sides of the element. Specifically, the dimple 7 is formed so as to protrude from the back surface or the front surface as a hole is formed by pressing one portion of the front surface or back surface of the element 6 in the thickness direction to form a hole. Therefore, when the dimple 7 is fitted into the hole of the adjacent element 6, the relative movement of the element 6 in the radial direction, that is, the vertical direction and the horizontal direction is restricted.

  Since the elements 6 are arranged in a ring shape, there is always a place where the elements 6 are arranged in a so-called fan-shaped (radial) open state around the center of curvature of the belt 1 without being parallel. A locking edge 8 is formed on the element 6 to allow a fan-shaped arrangement with the elements 6 in contact with each other. Specifically, the locking edge 8 is a boundary line or a boundary region where the thickness of the element changes, and the width direction (pulleys 2 and 3) at an intermediate position in the height direction of the element 6 (for example, a substantially central portion). In a direction parallel to the rotation center axis).

  That is, in the state where the belt 1 is wound around the pulleys 2 and 3, the peripheral length on the upper side of the element 6 (the outer peripheral side as the belt 1) becomes longer. Since the circumference of the lower side of the element 6 (inner circumference side as the belt 1) becomes shorter, the interval between the elements 6 becomes narrower. Therefore, the lower part of the element 6 is configured to be thin at the lower end side, and the portion where the plate thickness changes between the upper side and the lower side of the element is the rocking edge 8. Therefore, each element 6 rotates in the plate thickness direction around the rocking edge 8, that is, pitching occurs and opens like a fan as described above. The locking edge 8 may be formed on either one of the front and back surfaces. For example, the locking edge 8 is formed on the surface from which the dimple 7 protrudes.

  Each element 6 has a saddle surface 10 on which a ring 9 is placed (arranged). In the example shown in FIG. 1, three (three) rings 9a, 9b, 9c are used, and two (two) rings 9a, 9b have the same width, thickness and circumference. And it is comprised by laminating | stacking annular thin strip | belt-shaped material. Therefore, the circumference on the inner circumference side is short and the circumference on the outer circumference side is long, and the circumference at the center in the thickness direction, which is the average circumference, is the circumference of these rings 9a and 9b. is there.

  On the other hand, the other one (one) ring 9c is a ring having a smaller width, thickness and circumferential length than the above two rings 9a and 9b, and is formed by laminating thin annular strips. Has been. In other words, it is a ring with a small number of laminated strips. Therefore, also in the third ring 9c, the circumference on the inner circumference side is short and the circumference on the outer circumference side is long, and the circumference at the center in the thickness direction, which is the average circumference, This is the circumference of the ring 9c.

  And the circumference of the outermost circumference of the ring 9c with a short circumference is equal to or slightly smaller than the circumference of the innermost circumference of the rings 9a and 9b with a long circumference. Therefore, the ring 9c with a short circumference can be fitted in a nested manner on the inner circumference side of the rings 9a and 9b with a long circumference.

  The saddle surface 10 is configured so that the above-mentioned three strip rings 9a, 9b, 9c can be placed thereon. That is, a saddle surface 10c on which a ring 9c with a short circumference is arranged is formed at the center in the width direction, and saddle surfaces 10a, 10b on which rings 9a, 9b with a long circumference are arranged on both the left and right sides. Is formed. The left and right saddle surfaces 10a and 10b are formed to have a width wider than the width of the rings 9a and 9b disposed here, and as necessary, form a convex arcuate surface with a slightly raised central portion in the width direction. Can be crowned. On the other hand, the saddle surface 10c at the center is a surface formed with a step so as to be slightly wider than the ring 9c having a short circumference and disposed below the left and right saddle surfaces 10a, 10b. The step (in other words, the depth) is set to be equal to or greater than the thickness of the ring 9c having a short circumference.

  Since the saddle surface 10 (especially the left and right saddle surfaces 10a and 10b) is in contact with a ring 9 (particularly a ring 9a and 9b having a long circumference) that binds a large number of elements 6, the belt 1 In the state where torque is transmitted, the contact pressure increases. On the other hand, when the element 6 is wound around the pulleys 2 and 3 and opened in a fan shape from the linearly arranged state, the ring 9 and the saddle surface 10 and sliding, and a large frictional force is generated accordingly. The saddle surface 10 is formed at a position as close as possible to the aforementioned locking edge 8 so that the moment due to the frictional force does not increase. Therefore, the saddle surface 10 is formed at a substantially central portion (that is, a position between the upper end and the lower end) of each element 6 in the vertical direction.

  Also in the belt according to the present invention, the ring is mounted on the saddle surface and binds the elements so that the elements maintain an annular arrangement, so that the elements do not separate outward in the radial direction. In addition, when the element is sent out from the pulley winding groove, the element is pulled out from the winding groove. Therefore, in order to prevent the ring from coming out of the element in the radial direction, a retaining portion for holding the ring in a state of being sandwiched between the saddle surface is provided.

  For example, in FIG. 1, hook portions 11 are provided on both the left and right sides of the element 6 as a retaining portion that extends upward from the saddle surface 10 and covers a part of the upper side of the saddle surface 10. As shown in FIG. 1, the hook portion 11 is a portion having a hook shape (inverted L shape), and one side edge portion of the rings 9 a and 9 b disposed on the left and right saddle surfaces 10 a and 10 b is The saddle surface is loosely sandwiched between the saddle surfaces 10a and 10b. Therefore, the tip portions of the hook portions 11 are separated from each other, and an opening portion 12 for the saddle surface 10 is formed here. The distance between the hook portions 11, in other words, the opening width of the saddle surface 10, is the total width when two long (two) rings 9 a and 9 b are arranged in parallel (of each ring 9 a and 9 b). The total width is smaller than the total width when these three strips (three rings) 9a, 9b, 9c are arranged in parallel.

  Next, a procedure for assembling the belt 1 having the above-described configuration according to the present invention, that is, a method of the present invention will be described. As described above, the belt 1 according to the present invention includes at least two types of rings 9a, 9b, and 9c having different circumferential lengths. First, the circumferential length is set on the inner circumferential side of the long circumferential rings 9a and 9b. The short ring 9c is fitted. This state is shown in FIG. 3 and FIG. The example shown here includes a total of three (three) rings 9a, 9b, 9c, two long (two) rings 9a, 9b and one short (one) ring 9c. Therefore, the rings 9a and 9b having a long circumference are arranged in contact with each other so as to be in contact with each other, and the ring 9c having a short circumference is fitted to the central portion on the inner circumference side. That is, the ring 9c with a short circumference is fitted to both the rings 9a and 9b with a long circumference. The width of the aggregate of the rings 9a, 9b, 9c combined in this way is the sum of the widths of the rings 9a, 9b having a long circumference or a width obtained by adding a gap between them. It is smaller than the width of the opening 12 described above.

  Therefore, the element 6 is inserted into the inner peripheral side of the aggregate of the rings 9a, 9b, 9c, and the element 6 is moved relatively to the outer peripheral side with the opening 12 facing the rings 9a, 9b, 9c. Then, the aggregate of the rings 9 passes through the opening 12 and is disposed on the saddle surface 10. Specifically, a ring 9c having a short circumference is stored in the saddle surface 10c at the center. Further, the inner peripheral surfaces of the left and right long circumferential rings 9a and 9b are partially in contact with the corresponding saddle surfaces 10a and 10b.

  One or a plurality of elements 6 are assembled to such an assembly of rings 9, and finally, the number of elements 6 required for the belt 1 are assembled to the assembly of rings 9. In a different method, a large number of elements 6 are arranged in an annular shape with their respective postures aligned, and the aggregate of the ring 9 is fitted to the outer peripheral side, and the element 6 is aggregated in the state in that state. Move toward the inner peripheral surface. That is, the outer diameter of the row of elements 6 is increased. Therefore, in this method, the number of elements 6 arranged in a ring is made smaller than the number required for the belt 1, and the outer diameter of the elements 6 arranged in a ring is made small.

  Alternatively, the necessary number of elements 6 for the belt 1 are arranged in an annular shape, a part of which is bent toward the inner peripheral side, and the peripheral length of the outline connecting the entire outer periphery in the shortest is the assembly of the ring 9. It is configured to be shorter than the inner circumferential side circumference. In either state, the assembly of the ring 9 is fitted to the outer peripheral side, and then each element 6 is moved toward the inner peripheral surface of the assembly of the ring 9. That is, the outer diameter of the row of elements 6 is increased. By doing so, the aggregate of the rings 9 can be arranged on the saddle surface 10. The shortage of the element 6 is inserted and assembled between the previously assembled elements 6.

  In a state where the element 6 is assembled to the aggregate of the rings 9 as described above, the long circumferential rings 9a and 9b located on the outer circumferential side are moved in the left-right direction (the width direction of the element 6) in FIG. And the fitting with the ring 9c having a short circumference is eliminated while being placed on the corresponding saddle surfaces 10a and 10b. In this state, one side edge part of the ring 9a, 9b with a long circumference enters inside the left and right hook parts 11 and is prevented from coming off, and both left and right end parts of the ring 9c with a short circumference located at the center And the other side end of the ring 9a, 9b having a long circumference are close to each other.

  Therefore, since each element 6 has its hook portion 11 hooked on the rings 9a and 9b, the element 6 does not come off the ring 9 unless it is specially deformed. In addition, any ring 9a, 9b, 9c is bent and deformed when a tension is not particularly applied to the ring 9, that is, during handling such as when carrying around or when it is wound around the pulleys 2 and 3. Since the ring 9a, 9b, 9c is not the same in deformation, interference between the ring 9a, 9b with a long circumference and the ring 9c with a short circumference occurs. Therefore, the rings 9a and 9b having a long circumference located on the left and right are prevented from moving toward the center of the saddle surface 10, that is, the outer periphery of the ring 9c having a short circumference. As a result, the rings 9a and 9b having long left and right circumferential lengths are maintained in a state of being prevented from coming off by the hook portion 11, and these rings 9a and 9b are not detached from the element 6 unless they are specially deformed.

  As described above, the hook portions 11 for preventing the ring 9 from coming off are provided on both the left and right sides of the saddle surface 10, and the width of the opening 12 that is a portion between the hook portions 11 is the ring 9. Even when the width of the ring 9 is narrower, the belt 9 can be fitted to each other so as to form a ring assembly and the overall width thereof can be narrowed. Therefore, the belt 1 can be easily assembled. The belt can be manufactured efficiently by improving the manufacturability or assemblability of the belt.

  In order to more positively prevent the movement of the left and right rings 9a, 9b toward the center by the ring 9c having a short circumference located at the center, the circumference of the outer periphery of the ring 9c is set to The peripheral lengths of the inner peripheral portions of the left and right rings 9a and 9b may be longer. An example is shown in FIG. With such a configuration, since the outer peripheral portion of the ring 9c with a short circumference located at the center portion protrudes between the left and right rings 9a and 9b, the edges of these rings 9a, 9b and 9c The parts abut against each other (interfere) as indicated by C in FIG. 5, and the movement of the left and right rings 9a and 9b in the width direction is prevented.

  In such a configuration, when the rings 9a, 9b, 9c are fitted to each other, the ring 9c having a short circumference located on the inner circumference side is bent (or an extra length portion) 13 as shown in FIG. Occurs. However, the main function of the ring 9c with a short circumference is to prevent the movement of the left and right rings 9a and 9b in the width direction, and does not actively bind the elements 6, so the saddle at the center part. The surface 10c is made lower, that is, the step between the saddle surface 10c and the left and right saddle surfaces 10a, 10b is increased, and a space for accommodating the bending 13 is provided in the central saddle surface 10c. In this way, there is no problem in assembling the element 6 and the ring 9.

  The specific example described above is an example in which the third ring 9c that mainly prevents the left and right rings 9a and 9b from moving to the center portion of the saddle surface 10 is provided. A plurality of (a plurality of) rings, which are the main functions, can be configured to interfere with each other in the width direction to prevent the movement. An example of this is shown in FIG. In FIG. 7, the same reference numerals as those in FIG. 1 are assigned to the same components as those shown in FIG.

  The example shown here is an example in which the belt 1 is configured by binding the element 6 in an annular shape by two types of rings 19a and 19b having different average circumferences. Therefore, the element 6 corresponds to the rings 19a and 19b. Saddle surfaces 20a and 20b are formed. More specifically, each ring 19a, 19b is configured by laminating an annular thin metal strip like the ring 9 described above, and the circumferential length of the inner peripheral portion of one ring 19a. (That is, the shortest circumference) is equal to or less than the circumference of the outer peripheral portion of the other ring 19b (that is, the longest circumference), or the former is slightly longer than the latter. Further, the widths of these rings 19a and 19b may be the same or different, but are configured such that the total dimension of both is larger than the width of the opening 12 in the element 6. Yes.

  Thus, the circumference of one ring 19a (the average circumference which is the circumference at the center in the thickness direction) is the circumference of the other ring 19b (the circumference at the center in the thickness direction). Corresponding to this, the saddle surface 20 is formed by a high portion saddle surface 20a and a low portion saddle surface 20b. The saddle surface 20a of the high portion is the right portion in FIG. 7 and is a saddle surface having a width larger than that of the ring 19a having a long circumference arranged here, and the hook portion 11 covers the upper side of one side thereof. Yes. Further, the lower saddle surface 20b is a left side portion in FIG. 7 and is a saddle surface having a width larger than that of the ring 19b having a short circumference arranged here, and the hook portion 11 is located above one side portion of the saddle surface 20b. Covering.

  The steps of the saddle surfaces 20a and 20b are set to be equal to or greater than the thickness of the ring 19b having a short circumference. Preferably, the step corresponds to the thickness of the ring 19b having a short circumference, and with such a configuration, tension is applied to the rings 19a and 19b by the element 6 being sandwiched between the pulleys 2 and 3. In this case, the rings 19a and 19b can be evenly adhered to the saddle surfaces 20a and 20b.

  The belt 1 shown in FIG. 7 described above can be assembled by the procedure (method) described below. FIG. 8 is for explaining the method. First, the rings 19a and 19b are fitted together to form a so-called aggregate, and the overall width of the rings 19a and 19b is arranged in parallel. Keep it smaller than the overall width. The opening 12 may be wider than the width. Next, the element 6 is inserted obliquely with respect to the assembly of the rings 19a and 19b and inserted into the inner peripheral side thereof, and between the lower saddle surface 20b and one hook portion 11 covering the side portion, The side edge of the short ring 19b is inserted. By doing so, the aggregate of the rings 19a and 19b is biased to one of the left and right sides with respect to the element 6, more specifically toward the lower saddle surface 20b. And since each ring 19a, 19b is partially fitted, the width of the whole is relatively small.

  Therefore, when the element 6 is rotated around the portion engaged with the side portion of the ring 19b having a short circumference as shown by a thick arrow in FIG. 8, the other of the aggregates of the rings 19a and 19b is rotated. The side portion passes through the opening portion 12 and relatively enters the saddle surface 20 without interfering with the other hook portion 11 of the element 6. In this way, the ring 19b with a short circumference is disposed on the saddle surface 20b in the lower portion, and the ring 19a with a long circumference is disposed on the saddle surface 20a in the high portion. This state is shown by a solid line in FIG.

  In this way, one side portion of the element 6 is engaged with the assembly of the rings 19a and 19b, and then the element 6 is rotated around the engagement portion, so that the assembly of the rings 19a and 19b is obtained. The operation of inserting the saddle surface 20 may be performed for each element 6 or may be performed for a plurality of elements 6 at once. In addition, the above description is a case where the assembly of the rings 19a and 19b is fixed and the element 6 is moved and assembled to the ring 19a. However, in summary, the assembly of the rings 19a and 19b and the element 6 are the above. The element 6 or an assembly thereof may be prepared and fixed, and the assembly of the rings 19a and 19b may be moved and assembled together.

  The assembly of the rings 19a and 19b inserted on the saddle surface 20 side as described above is in a state in which the rings 19a and 19b are partially fitted, and the ring 19a having a particularly long circumference is It does not completely rest on the corresponding saddle surface 20a, but is biased toward the center. Therefore, the ring 19a having a long circumference is moved in the width direction so as to be completely placed on the saddle surface 20a. And the fitting with the ring 19b with short circumference is canceled. In this state, one side edge of each ring 19a, 19b enters inside the left and right hook parts 11 to prevent it from coming off, and the other side edge of each ring 19a, 19b is close to each other. .

  Accordingly, the hook portion 11 of each element 6 is hooked on the rings 19a and 19b. Therefore, the element 6 does not come off the ring 19 unless it is deformed specially. Also, when the ring 19 is not particularly tensioned, that is, when handling such as when it is transported or wound around the pulleys 2 and 3, the rings 19a and 19b are bent and deformed, and the bending and deformation of each ring 19 Since 19a and 19b are not the same, interference between the rings 19a and 19b occurs. Therefore, the ring 19a having a long circumference located on the right side in FIG. 7 is prevented from moving to the center side, that is, the outer circumference side of the ring 19b having a short circumference. As a result, the rings 19a and 19b are maintained in a state where they are prevented from coming off by the hook portion 11, and these rings 19a and 19b do not come off the element 6 unless they are specially deformed. If the maximum peripheral length of the outer peripheral portion of the ring 19b with a short peripheral length is set slightly longer than the minimum peripheral length of the inner peripheral portion of the ring 19a with a long peripheral length, interference between the rings 19a and 19b is more positive. Therefore, it is possible to prevent the ring 19a having a long circumference from moving to the center side.

It is sectional drawing of the belt for showing the element which comprises the belt made into object by this invention. It is a schematic diagram of the continuously variable transmission using the belt made into object by this invention. It is a figure for demonstrating the procedure which assembles the belt shown in FIG. It is a side view which shows the aggregate | assembly of the ring. It is sectional drawing of the belt which shows the example comprised so that rings may interfere actively. It is a side view which shows the aggregate | assembly of the ring. It is sectional drawing which shows the example of the belt which concerns on this invention using the ring of two strips (two). It is sectional drawing for demonstrating the procedure which assembles | assembles the assembly of two rings, and an element. It is a front view of the block which comprises the conventional belt.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Belt, 2, 3 ... Pulley, 4 ... Winding groove, 6 ... Element, 6A ... Torque transmission surface, 9, 9a, 9b, 9c, 19a, 19b ... Ring, 10, 10a, 10b, 10c, 20a, 20b ... saddle surface, 11 ... hook part, 12 ... opening.

Claims (6)

A saddle surface is provided in which a large number of plate-like elements arranged in an annular shape with a uniform posture are bundled together by a ring, and a saddle surface for arranging the ring is provided at the center in the width direction of the element. On both the left and right sides of the saddle surface, there are provided retaining portions that project upward from the saddle surface and cover the side edges of the ring on the saddle surface, and the left and right retaining portions are separated from each other. In the belt for continuously variable transmission, the interval of which is smaller than the width of the entire ring arranged in the width direction on the saddle surface,
The element includes at least two saddle surfaces with a step for arranging the ring between the left and right side surfaces contacting the pulley,
The ring includes at least two types of rings that have different circumferential lengths at the center in the thickness direction and can be fitted to each other, and the ring with a short circumferential length is a relative portion of the saddle surface having the step. A belt for a continuously variable transmission, wherein the belt having a long circumference is disposed on a saddle surface of a relatively high portion of the saddle surface having a step. . A saddle surface is provided in which a large number of plate-like elements arranged in an annular shape with a uniform posture are bundled together by a ring, and a saddle surface for arranging the ring is provided at the center in the width direction of the element. On both the left and right sides of the saddle surface, there are provided retaining portions that project upward from the saddle surface and cover the side edges of the ring on the saddle surface, and the left and right retaining portions are separated from each other. In the assembling method of the belt for continuously variable transmission, the interval is smaller than the width of the entire ring arranged in the width direction on the saddle surface.
Arranged in a state in which at least two types of rings having different circumferential lengths in the central part in the thickness direction are fitted to each other on the outer peripheral side of the multiple elements arranged in a ring shape in a uniform posture,
While relatively approaching the saddle surface with a step in the element in which at least two kinds of rings fitted to each other are annularly arranged,
The inner ring with a short circumference is stored in the saddle surface of a relatively low portion of the saddle surface with a step,
Next, the belt on the continuously variable transmission is assembled by moving the ring on the outer peripheral side having a long peripheral length in the width direction so as to fit the saddle surface at a relatively high portion of the saddle surface having the step. .   The at least two kinds of rings and the elements that are fitted to each other are relatively translated in parallel with the saddle surface, and the ring having a short circumference is accommodated in the saddle surface of the relatively low portion; and By moving the ring having a long circumference in the width direction, one side portion of the ring is inserted between a retaining portion provided on a side portion of the element and a saddle surface. The method for assembling the continuously variable transmission belt according to claim 2.   The hook-shaped retaining portion formed on one side of the element is engaged with one of the side edges of at least two types of rings fitted to each other, and then the saddle surface of the element is By rotating the element around one of the side edges so as to approach the at least two types of rings, the rings fitted to each other are passed between the retaining portions of the element. The continuously variable inner ring according to claim 2, wherein the inner ring on the saddle surface and having a short circumference is stored in a saddle surface at a relatively low portion of the saddle surface having a step. A method for assembling a transmission belt.   2. The continuously variable transmission belt according to claim 1, wherein a circumference of the outer circumferential surface of the ring having a short circumference is equal to or less than a circumference of an inner circumferential surface of the ring having a long circumference. A method for assembling the continuously variable transmission belt according to any one of claims 1 to 4. The left and right sides form a plate-like shape with a torque transmission surface that contacts the pulley, and a saddle surface for placing the belt is formed at the center in the width direction, and both the left and right sides sandwiching the saddle surface Are provided with a retaining portion that protrudes upwardly to cover the side edge of the ring on the saddle surface, and the left and right retaining portions are separated from each other, and the spacing between the retaining portions is the saddle surface. In the element of the belt for continuously variable transmission, which is smaller than the entire width of the ring arranged side by side in the width direction above,
The saddle surface has a relatively lower portion for disposing a ring having a short circumference among at least two types of rings having different circumferences at the center in the thickness direction and capable of being fitted to each other. A continuously variable transmission comprising: a saddle surface; and a second saddle surface that is adjacent to the first saddle surface with a step and has a relatively high portion for disposing the long ring. Belt element.

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