JP3964836B2 - Subassembly assembly method and assembly jig for continuously variable transmission belt - Google Patents

Description

  According to the present invention, in a process of assembling a continuously variable transmission belt composed of a predetermined number of plate-like elements and a pair of ring members, a sub-assembly formed by arranging these elements in the circumferential direction of one ring member is provided. The present invention relates to a method for assembling and an assembling jig used for carrying out this method.

  Referring to FIG. 1A, a continuously variable transmission belt element 1 includes a body portion 2 that contacts a pulley of a continuously variable transmission, and a body portion 2 that is connected to a body portion 2 via a neck portion 3. It has a triangular head portion 4 and a pair of groove portions 5 and 5 formed on both sides of the neck portion 3 between the body portion 2 and the head portion 4. Then, by fitting a pair of ring members 6 and 6 formed by laminating a plurality of thin metal rings into the grooves 5 and 5 of the predetermined number of elements 1 as shown in FIG. The continuously variable transmission belt A is assembled by binding the elements 1 in a state of being arranged in the circumferential direction of the ring member 6. In addition, the head 4 is formed with a half-cut process and a projection 4a on one side and a concave hole 4b (shown by a broken line in FIG. 1A) on the opposite side, and the projection 4a of each element 1 is adjacent to the element 1 The elements are aligned with each other by engaging with the concave holes 4b.

  In the assembly process of the continuously variable transmission belt A, first, one groove portion 5 of each of a predetermined number of elements 1 is fitted into one ring member 6, and these elements 1 are placed in the circumferential direction of the ring member 6. After assembling the belt sub-assemblies, the other ring member 6 is fitted into the other groove 5 of these elements 1.

  Conventionally, as a method of assembling a sub-assembly, a predetermined number of elements are provided on a guide member that supports one ring member in a horizontal posture and extends in a substantially tangential direction of the ring member toward a position directly above a part of the ring member. Slidably supported in an upright posture such that one of the groove portions is on the lower side and the other is on the upper side, and these elements are pushed along the guide member toward a position directly above a part of one of the ring members. By dropping each element in turn toward the one ring member from the tip of the guide member so that the lower groove portion of each element is fitted to the one ring member, these elements are arranged in the circumferential direction of the one ring member. There is known a method of arranging (see, for example, Patent Document 1).

Here, in the above conventional example, a guide rail that fits into the groove on the lower side of the element is used as the guide member. In this case, the guide rail is disposed so as to face and oppose the outer peripheral surface of a portion adjacent to the element pushing direction of the part of the ring member in the opposite direction. Therefore, when the element dropped into the ring member circulates around the ring member and reaches a position in front of the part, the element interferes with the guide rail and cannot proceed further. Therefore, in the conventional example, when the leading element reaches the position where it interferes with the guide rail, the feeding of the element is stopped, and the remaining elements are assembled manually to the ring member where the leading element has become unable to advance. ing.
JP 2002-233920 A

  In the method of the conventional example, as described above, some elements must be manually assembled to the ring member, which is a problem in improving work efficiency.

  In view of the above, the present invention is a continuously variable transmission in which all of a predetermined number of elements constituting a belt can be assembled to a ring member by dropping from a guide member, eliminating the need for manual assembly of elements. It is an object of the present invention to provide a method for assembling a belt sub-assembly and an assembling jig.

  In order to solve the above-mentioned problem, a body portion that contacts the pulley of the continuously variable transmission, a head portion that is connected to the body portion via a neck portion, and a body portion between the body portion and the head portion on both sides of the neck portion. A pair of ring members are fitted to both groove portions of a predetermined number of plate-shaped elements having a pair of substantially T-shaped groove portions, which are formed and have a wide groove width at the inner end portion in contact with the neck portion. Thus, in the assembly process of the continuously variable transmission belt formed by bundling these elements in the circumferential direction of the ring member, one groove portion of each of a predetermined number of elements is fitted to one ring member. A method of assembling a sub-assembly in which these elements are arranged in the circumferential direction of the ring member, wherein one ring member is supported in a horizontal posture and directed toward a position directly above a part of the ring member. Tangential direction A predetermined number of elements are supported on a guide member extending in a slidable manner in an upright posture such that one of the groove portions is on the lower side and the other is on the upper side, and these elements are supported on one ring along the guide member. Push each element in a single row toward a position directly above a part of the member, and turn each element from the tip of the guide member to one ring member in order so that the lower groove of each element fits into one ring member. In the arrangement in which these elements are arranged in the circumferential direction of one ring member by dropping, the width of the lower end engaged with the widened portion of the inner end of the upper groove portion of the element is used as the guide member. A hanger rail with a substantially inverted T-shaped cross section is used, and the element is slidably suspended on the hanger rail in the upper groove, and one ring member And then filled-in element so that slips into a space below the hanger rail when substantially round from the portion of the ring member.

  The assembly jig of the present invention includes a pedestal for supporting one ring member in a horizontal posture and the hanger rail as a guide member, and the arrangement height of the hanger rail is set to the portion of the one ring member. It is set to a height at which the element that has made one round from the bottom can enter the space below the hanger rail.

  In the present invention, the element dropped into the ring member and made one round from the part enters the space below the hanger rail and can advance to the part without interfering with the hanger rail. Therefore, all the predetermined number of elements can be dropped from the hanger rail and assembled to the ring member, which eliminates the need for manually assembling the elements and improves the work efficiency.

  In the assembling jig of the present invention, the portion on the tip side of the hanger rail is curved so as to match the projected shape of one of the ring members, and is inclined downward, so that the element extends from the tip of the hanger rail. If the element is lowered to a position where the body part of the element comes into contact with the inner peripheral surface of one of the ring members before being detached, the element detached from the hanger rail is guided by the ring member and lowered. The ring member is securely fitted into the lower groove. In addition, if the hanger rail is formed straight in the tangential direction over the portion on the tip side so that the tip of the hanger rail coincides with one portion directly above the ring member, even if the tip side portion is inclined downward, the element The lower end of the body part comes into contact with the upper edge of the ring member in the middle of descending, and the lower groove part cannot be fitted into the ring member well. Such inconvenience can be avoided by bending the tip side portion of the hanger rail as described above.

  In addition, the element guide portion with which the lower end of the body portion of the element is in contact with the pedestal in a state where there is a gap between the upper edge of the one ring member and the inner end of the lower groove portion of the element is attached to the ring. If provided along the inner periphery of the member, the friction between the element and the ring member can be reduced, and the element can be smoothly advanced in the circumferential direction of the ring member. In this case, at the part where the element makes a round from the part of one ring member and enters the lower space of the hanger rail, the height of the element guide part is lowered, and the inner end of the groove on the lower side of the element is one side. It contacts with the upper edge of the ring member. According to this, the interference of the element with the hanger rail can be avoided without increasing the arrangement height of the hanger rail to the left.

  Also, if the pedestal is provided so as to be relatively movable in the horizontal direction with respect to the hanger rail, after assembling a subassembly in which a predetermined number of elements are arranged in the circumferential direction of the ring member by dropping the elements from the hanger rail, the pedestal is It is advantageous that it can be moved and the subassembly can be easily taken up from the pedestal without being disturbed by the hanger rail.

  2 and 3 show an assembling jig 10 used for assembling the sub-assembly of the belt A for continuously variable transmission shown in FIG. The jig 10 includes a pedestal 12 provided on a base plate 11. The pedestal 12 is circular, and has two upper and lower steps on the outer periphery. The lower step portion is a receiving portion 13 for a ring member, and the upper step portion is a guide portion 14 for an element. Then, in the state where the lower portion of one ring member 6 of the continuously variable transmission belt A is fitted on the cylindrical step surface 13a between the receiving portion 13 and the guide portion 14, The ring member 6 can be positioned and supported in a horizontal posture by being seated on the upper surface. Further, a clearance for receiving the body portion 2 of the element 1 is secured between the cylindrical step surface 14 a between the guide portion 14 and the upper end surface of the base 12 and the ring member 6.

  Further, a hanger rail 15 extending in the lateral direction, which is the tangential direction of the ring member 6, is provided with the lower side in FIG. 2 as the front, toward the position immediately above the foremost part of the ring member 6 supported by the pedestal 12. As clearly shown in FIG. 4, the hanger rail 15 suspends the element 1 in a standing posture so that one of the groove portions 5 and 5 of the element 1 is on the lower side and the other is on the upper side in the upper groove portion 5. In order to prevent the element 1 from falling off, it is formed in a substantially inverted T-shaped cross section having a widened portion 15a at the lower end that engages with the widened portion 5a at the inner end of the groove 5 on the upper side of the element 1.

  A predetermined number of elements 1 constituting one belt A are supplied to the hanger rail 15 via a conveying rail 16 that engages with a groove 5 on the lower side of the element 1 from a feeder device (not shown). The transport rail 16 is fixed to the base plate 11 and, as clearly shown in FIG. 5, both rails with the base end of the hanger rail 15 positioned above the front end of the transport rail 16. 15 and 16 are connected via a U-shaped connecting block 17 which allows passage of the element 1. Then, the hanger rail 15 is engaged with the groove 5 on the upper side of the element 1 in the standing posture supported by the conveyance rail 16, and the element 1 is transferred from the conveyance rail 16 to the hanger rail 15. Along with the hanger rail 16, the ring member 6 is pushed in a single row toward the position immediately above the foremost portion of the ring member 6. In the figure, 17a is a fixing bolt for the connecting block 17 and the rails 15 and 16.

  The front end portion 15b of the hanger rail 15 extends rightward beyond the position immediately above the foremost portion of the ring member 6 so that the front end portion 15b matches the projected shape of the ring member 6 upward. It is curved and inclined downward as shown in FIG. Then, the position of the body portion 2 of the element 1 in contact with the inner peripheral surface of the ring member 6 before the element 1 is detached from the front end of the hanger rail 15 due to the inclination of the front end portion 15b, as indicated by the phantom line in FIG. Until the element 1 is lowered.

  The element guide portion 14 formed on the pedestal 12 is formed before the groove portion 5 on the lower side of the element 1 dropped from the tip of the hanger rail 15 is completely fitted to the ring member 6, that is, on the ring member 6. It is formed so that the lower end of the body portion 2 of the element 1 is in contact with a gap between the edge and the inner end (neck portion 3) of the groove 5 on the lower side of the element 1. Therefore, the friction between the element 1 and the ring member 6 is reduced as compared with the state where the lower groove 5 is completely fitted to the ring member 6, and the element 1 advances smoothly in the circumferential direction of the ring member 6. .

  Further, the height of the guide portion 14 is lowered over a predetermined range in the portion opposite to the element pushing direction of the foremost portion of the ring member 6, that is, the left portion, and the groove portion 5 on the lower side of the element 1 is lowered in this low portion 14b. The element 1 is lowered to a height at which the ring member 6 is completely fitted, that is, a height at which the inner end (neck portion 3) of the lower groove portion 5 contacts the upper edge of the ring member 6. In the figure, reference numeral 14c denotes an inclined step portion between the general portion of the guide portion 14 and formed on both sides of the formation range of the low portion 14b.

  When the sub-assembly is assembled, a predetermined number of elements 1 constituting one belt A are pushed in a single row along the hanger rail 15 toward the position immediately above the frontmost portion of the ring member 6. According to this, as shown in FIG. 6 (a), the element 1 is dropped toward the ring member 6 in order from the tip of the hanger rail 15, and the lower groove portion 5 of the element 1 becomes the ring member 6. To fit. In this state, the element 1 is pushed by the subsequent element 1 and advances in the circumferential direction of the ring member 6. Since the elements 1 are engaged with each other by the protrusion 4a and the recessed hole 4b of the head portion 4, the element 1 pushed out from the tip of the hanger rail 15 is until the lower end of the body portion 2 comes into contact with the guide portion 14. Gradually descend. At this time, since the element 1 is lowered to the position where the body portion 2 is in contact with the inner peripheral surface of the ring member 6 at the tip end portion 15b of the hanger rail 15, the element 1 pushed out from the tip of the hanger rail 15 is The ring member 6 is guided and lowered, and the ring member 6 is securely fitted into the groove 5 on the lower side.

  Further, when the element 1 substantially goes around the ring member 6 and reaches the vicinity of the arrangement portion of the hanger rail 15, the element 1 moves to the low portion 14 a of the guide portion 14 and reaches a height at which the element 1 is completely fitted to the ring member 6. Descend. Then, as shown in FIG. 6B, the element 1 advances without interfering with the hanger rail 15 in a state of being submerged in the space below the hanger rail 15. Then, the head element 1 advances so as to follow the last element 1 suspended on the hanger rail 15, and when the last element 1 is pushed out from the tip of the hanger rail 15, a predetermined number of all The elements 1 are arranged in the circumferential direction of the ring member 6, and the assembly of the sub-assembly is completed.

  When the subassembly is assembled in this manner, the subassembly is then picked up from the base 12 and set in another jig, and the remaining ring member 6 is fitted into the upper groove portion 5 of the element 1 so that the stepless assembly is completed. Assemble the transmission belt A. In this case, if the pedestal 12 is stationary with respect to the hanger rail 15, the hanger rail 15 becomes an obstacle and it becomes difficult to pick up the sub-assembly.

  Therefore, the base 12 is movable relative to the hanger rail 15 in the horizontal direction, for example, in the front-rear direction perpendicular to the extending direction of the hanger rail 15. In detail, a guide hole 18 is formed in the base plate 11, and a guide plate 19 that is slidably fitted in the guide hole 18 in the front-rear direction is fixed to the lower surface of the base 12. It is slidable in the direction. Further, a ball plunger 20 exposed on the lower surface of the base 12 is attached to the pedestal 12, while a pair of front and rear recesses with which the ball 20 a of the ball plunger 20 is engaged with the base plate 11 at the forward end position and the backward end position of the base 12. Holes 21 and 22 are formed so that the base 12 can be locked at the forward end position and the backward end position. Here, at the forward end position of the pedestal 12, the foremost part of the ring member 6 supported by the pedestal 12 faces directly below the front end of the hanger rail 15, and the above-described subassembly is assembled. After the subassembly is assembled, the subassembly can be taken up from the base 12 without being hindered by the hanger rail 15 by moving the base 12 to the retracted end position. Further, the notch portions 13b and 13b are formed on the left and right side portions of the base 12 in the receiving portion 13 for the ring member, and the sub-assembly can be easily taken up by placing a finger on the ring member 6 in the notch portion 13b. I am doing so.

  It is also possible to assemble the continuously variable transmission belt A by fitting the remaining ring member 6 in the groove 5 on the upper side of the element 1 while the subassembly is supported on the base 12. Also in this case, the base 12 is moved to a position away from the hanger rail 15 so that the ring member 6 can be fitted into the upper groove portion 5 without being hindered by the hanger rail 15.

  Further, in this embodiment, the pedestal 12 is movable relative to the hanger rail 15 in the front-rear direction, which is a horizontal direction perpendicular to the direction in which the hanger rail 15 extends, but the work after the subassembly is assembled is hindered by the hanger rail 15. The pedestal 12 may be freely movable in any horizontal direction as long as it can be performed without being performed.

(a) Front view of element, (b) Perspective view of part of continuously variable transmission belt. The top view of embodiment of the jig | tool for an assembly of this invention. FIG. 3 is a cross-sectional view of the assembling jig cut along line III-III in FIG. 2. The enlarged view of the area | region of IV of FIG. The perspective view of the connection part of a hanger rail and a conveyance rail. (a) The figure which shows the assembly initial state of the subassembly seen from the arrow VI direction of FIG. 2, The figure which shows the assembly final state of a subassembly.

Explanation of symbols

A ... Belt for continuously variable transmission, 1 ... Element, 2 ... Body part, 3 ... Neck part, 4 ... Head part, 5 ... Groove part, 5a ... Widened part at inner end of groove part, 6 ... Ring member, 10 ... For assembly Jig, 12 ... Base, 14 ... Element guide part, 14b ... Lower part of guide part, 15 ... Hanger rail, 15a ... Widened part, 15b ... Tip side part

Claims (5)

A body portion that contacts the pulley of the continuously variable transmission, a head portion that is connected to the body portion via a neck portion, and formed between both sides of the neck portion between the body portion and the head portion. By fitting a pair of ring members into both groove portions of a predetermined number of plate-like elements having a pair of substantially T-shaped groove portions with a wider groove width at the inner end portion in contact with the neck portion, the elements are made to ring. In the assembling step of the continuously variable transmission belt formed by bundling the members arranged in the circumferential direction, one groove portion of each of a predetermined number of elements is fitted into one ring member, and A method of assembling a subassembly comprising these elements arranged in a direction,
One ring member is supported in a horizontal posture, and a predetermined number of elements are placed on a guide member extending in a substantially tangential direction of the ring member toward a position directly above a part of the ring member, and one of both grooves is on the lower side. , Slidably supported in an upright posture with the other on the upper side, and these elements are pushed along the guide member toward a position directly above a part of one of the ring members, so that the groove on the lower side of each element In order to fit one ring member, each element is arranged in the circumferential direction of one ring member by dropping each element in turn toward one ring member from the tip of the guide member.
As the guide member, a hanger rail having a substantially inverted T-shaped cross section having a widened portion at the lower end engaged with the widened portion at the inner end of the upper groove portion of the element is used, and the element is slid on the hanger rail in the upper groove portion. The continuously variable transmission is characterized in that it is suspended freely and the element dropped into one of the ring members sinks into the lower space of the hanger rail when it makes one round from the part of the ring member. Assembling method of belt sub-assembly. A body portion that contacts the pulley of the continuously variable transmission, a head portion that is connected to the body portion via a neck portion, and formed between both sides of the neck portion between the body portion and the head portion. By fitting a pair of ring members into both groove portions of a predetermined number of plate-like elements having a pair of substantially T-shaped groove portions with a wider groove width at the inner end portion in contact with the neck portion, the elements are made to ring. In the assembling step of the continuously variable transmission belt formed by bundling the members arranged in the circumferential direction, one groove portion of each of a predetermined number of elements is fitted into one ring member, and An assembly jig used for assembling a subassembly having these elements arranged in a direction,
A pedestal that supports one ring member in a horizontal posture, and extends in a substantially tangential direction of the ring member toward a position directly above a part of the one ring member supported by the pedestal, and a predetermined number of elements are connected to both groove portions. Including a guide member that is slidably held in a standing posture such that one of the lower side is the upper side and the other is the upper side.
A hanger that has a substantially inverted T-shaped cross section having a widened portion at the lower end that engages with a widened portion at the inner end of the upper groove portion of the element as the guide member, and that slidably suspends the element in the upper groove portion For a continuously variable transmission using a rail, the hanger rail arrangement height is set to a height at which an element that makes one round from the part of one ring member can sink into the space below the hanger rail. Jig for assembly of belt sub-assembly.   The front end portion of the hanger rail is curved so as to match the projected shape of one of the ring members and is inclined downward, and before the element is detached from the front end of the hanger rail, the body portion of the element is The subassembly assembly jig for a continuously variable transmission belt according to claim 2, wherein the element is lowered to a position in contact with the inner peripheral surface of one of the ring members.   The element guide portion with which the lower end of the body portion of the element abuts in the state where there is a gap between the upper edge of one ring member and the inner end of the lower groove portion of the element on the pedestal is one ring member In addition, the height of the element guide portion is lowered at the part where the element goes around the part of one ring member and goes into the lower space of the hanger rail. 4. The subassembly assembly jig for a continuously variable transmission belt according to claim 2, wherein an inner end of the groove portion on the side is in contact with an upper edge of one of the ring members. The subassembly assembly jig for a continuously variable transmission belt according to any one of claims 2 to 4, wherein the pedestal is provided to be movable relative to the hanger rail in a horizontal direction.

Images