JP4517657B2 - element - Google Patents

Description

The present invention relates to elements having a plate portion having a thickness of entering the its slit portion slit portion, but about the elementary bets is a metal piece that is especially barrel polishing.

  As an example, this type of element is used as a constituent member of a belt in a belt type continuously variable transmission. As an example, FIG. 3 shows an element 1 which is a metal plate piece used in the belt, and the element 1 shown here is a base portion in which left and right side surfaces are tapered inclined surfaces. The left and right side surfaces that have a certain plate portion 2 and are inclined in a tapered shape are friction surfaces 4 and 5 that frictionally contact the belt winding groove of the pulley 3 to transmit torque.

  A neck portion 6 extending upward in the figure is formed at the center portion in the width direction of the plate portion 2. On the upper end portion of the neck portion 6, a top portion 7 extending in an umbrella shape is integrally formed on both sides of the plate portion 2 in the width direction. Therefore, slit portions 8 and 9 opened in the left-right direction are formed between the upper edge portion of the plate portion 2 in the drawing and the lower edge portion of the top portion 7 in the drawing. The slit portions 8 and 9 are portions for winding a hoop 10 which is a metal band for annularly binding the elements 1 arranged in close contact with each other in an annular shape, and therefore the upper edge of the plate portion 2 in the figure. The portions are saddle surfaces 11 and 12 with which the hoop 10 contacts.

  The elements 1 are bound by a hoop 10 in an annular arrangement, and are wound around the pulleys 3 on the driving side and the driven side in this state. Therefore, in the state of being wound around the pulley 3, each element 1 needs to expand in a fan shape with respect to the center of the pulley 3 and be in close contact with each other. The portion on the center side in the arrayed state) is formed thin. That is, the thickness of the plate 2 is gradually reduced in a state where the lower portion is scraped off from a portion of the one surface (for example, the left side surface in FIG. 3B) that is lower than the saddle surfaces 11 and 12 by a predetermined dimension. ing. Therefore, when each element 1 spreads and contacts in a fan shape, it contacts in the boundary part from which the board thickness changes. The edge of the boundary portion is a rocking edge 13.

  Each element 1 is formed with a convex portion 14 and a concave portion 15 for determining a relative position. That is, a dimple 14 having a circular cross section that is convex on one surface side (in the example shown, on the surface side where the locking edge 13 is present) is formed at the extended position of the neck portion 6 (or the central portion of the top portion 7). Has been. A bottomed cylindrical hole 15 for loosely fitting (inserting) the dimple 14 in the adjacent element 1 is formed on the surface opposite to the dimple 14. Therefore, when these dimples 14 and the holes 15 are fitted, the relative positions of the elements 1 in the horizontal direction and the vertical direction in FIG. 3A are determined.

  Since about 300 to 400 elements 1 are used for one belt, the number of elements 1 to be manufactured is considerably large. Therefore, conventionally, the element 1 is mainly manufactured by press working. Further, since the elements 1 assembled as a belt not only contact each other but also contact the hoop 10, processing such as deburring accompanying press processing is necessary to make smooth contact. Therefore, conventionally, barrel processing has been adopted in order to polish a large amount of elements 1 in a lump. An example of this is described in Patent Document 1. In the invention of Patent Document 1, a first medium having a size smaller than the gap interval (opening width) of the slit and a second medium having a size larger than the gap interval of the slit are described. By using this medium, the inside and the surface of the slit are polished simultaneously.

The portion below the locking edge 13 in the drawing should be thin enough to have a predetermined strength so as not to cushion each other when it is wound around the pulley 3 and spreads into a fan shape. There are few restrictions on its shape. Therefore, for example, in the invention described in Patent Document 2, a concave groove body is formed in the lower portion of the plate portion described above in order to satisfactorily hold the lubricating oil. Further, in the invention described in Patent Document 3, in order to increase the center of gravity of the element, a portion having a thin plate thickness is provided in the lower portion of the plate portion described above.
JP 2003-231053 A Japanese Patent Laid-Open No. 10-252834 JP-A-2-225840

  In the element 1 having the structure shown in FIG. 3, the vertical position in FIG. A downward load is applied. Therefore, when there is a variation in the dimension between the dimple 14 or the hole 15 and the saddle surfaces 11 and 12, a load in the direction of pulling the neck 6 acts. In that case, since the saddle surfaces 11 and 12 extend in a direction perpendicular to the base end portion of the neck portion 6, a bending moment acts between the neck portion 6 and the saddle surfaces 11 and 12. Since the bending moment becomes maximum at the corner portion which is the boundary portion between the neck portion 6 and the saddle surfaces 11 and 12, in order to prevent stress concentration at this portion, as shown in FIG. Are recessed in an arc shape to form a so-called R portion 16.

  The R portion 16 is processed together with the element being punched out by press working. In that case, if the surface roughness of the arc surface of the R portion 16 is rough, cracks may occur due to stress concentration. Therefore, the press die is changed every predetermined time or every predetermined number of times of processing. The surface roughness of the arc surface is not deteriorated. However, since the press die is expensive, if it is frequently replaced due to the arc surface roughness of the R portion 16, the processing cost of the element increases, and consequently the manufacturing cost of the belt or continuously variable transmission increases. It may be a factor.

  In order to solve such a problem, it is conceivable to polish the R portion 16 at the same time during the barrel processing of the slit portion and the entire surface described above. For this purpose, it is necessary to use a medium having an external dimension that can enter the R portion 16 as a medium that is an abrasive particle. There is a high possibility that the medium is caught between the plate portion of another element fitted in the slit portion of the element and the inner surface of the slit portion, and these two elements cannot be detached.

The present invention has been made paying attention to the above technical problem, and prevents or suppresses the biting of the plate portion into the slit portion during barrel polishing using so-called small particle size abrasive particles. it is an object to provide how an element capable.

To achieve the above object, a first aspect of the invention, the slit portion of the predetermined gap distance, a plate portion having a thickest portion thickness Komu Ri enter a thickness in the slit portion, the plate portion stirring and neck portion projecting, the plate portion and having a curved portion which recesses machined corner portion into a smooth arcuate shape of the neck portion, with a small lab Migakuyo particles than the maximum outer dimensions inner diameter of the curved portion from a metallic elementary bets to be polished is a thin plate portion the difference between the gap distance and the plate thickness of the front Symbol slit portion has a constant thickness that is larger than the inner diameter of the curved portion, A step for partitioning the plate portion and the thin plate portion is formed .

Further, the invention of claim 2 is a plate portion that is a base portion and is formed with a thin plate portion that is partially thinned, a top portion in which the left and right sides in the width direction extend in an umbrella shape, and the width direction A neck portion that connects the plate portion and the top portion at a central portion, and a slit portion that is formed by a surface that connects the plate portion, the neck portion, and the top portion, respectively, and that opens in the left-right direction in the width direction; The curved portion obtained by recessing the corner portion of the plate portion and the neck portion into a smooth arc shape, and the gap between the slit portion and the plate thickness are constant so that the difference between them is larger than the inner diameter of the curved portion. and a thin plate portion having a thickness, a metallic elementary bets dimensions are polished is stirred with a small lab Migakuyo particles than an inner diameter of the curved portion, the plate portion in the slit portion And the top facing each other A gap distance is the distance between the opposing faces of, respectively, a constant held by the thin portions in a direction perpendicular to the adjacent surface the elements of the plate portion adjacent to the other elements when arranged in a ring in close contact with each other the difference between the thickness of the front Symbol to be greater Ri by the inner diameter of the curved portion, the slit portion and the front Symbol thin plate is an element which is characterized by being composed.

Furthermore, the invention of claim 3 includes a slit portion having a predetermined gap interval, a plate portion having a thickness in which the thickest portion of the plate enters the slit portion, a neck portion protruding from the plate portion, and the plate portion And a curved portion in which a corner portion between the neck portion and the neck portion is recessed into a smooth arc shape, and is a metal element that is agitated and polished together with abrasive particles having an inner diameter of the curved portion as a maximum outer dimension. A second thin plate portion having a constant thickness such that a difference between the gap interval and the plate thickness of the slit portion is larger than an inner diameter of the curved portion, and a constant thickness larger than the second thin plate portion. Steps for partitioning the first thin plate portion having a thickness, the plate portion and the first thin plate portion, and the first thin plate portion and the second thin plate portion are formed. Is an element characterized by

The invention of claim 4 includes a slit portion of the predetermined gap distance, a plate portion having a thickness of the thickest portion of the plate thickness Komu to enter the the slit portion, and neck portion projecting from the plate portion, the A metal element that has a curved portion in which a corner portion between the plate portion and the neck portion is recessed into a smooth arc shape, and is stirred and polished together with abrasive particles having an inner diameter of the curved portion as a maximum external dimension. And a second thin plate portion having a constant thickness such that a difference between a gap interval and a plate thickness of the slit portion is larger than an inner diameter of the curved portion, and larger than the second thin plate portion. and a first thin portion having a constant thickness, is an element you characterized in that said second thin plate portion and a first thin plate portion are alternately formed in the element width direction .

According to this invention, when a plurality of elements are agitated and polished together with abrasive particles, the plate portion of other elements and the abrasive particles may enter the slit portion of any element. Since the width of the part (gap gap) is larger than the sum of the thickness of the plate part (plate thickness) and the maximum outer dimensions of the abrasive particles, it is possible to prevent or suppress the situation where these parts are caught in the slit part and cannot be removed. Is done. Therefore, the element can be satisfactorily polished.

Further, according to the present invention, the thin plate portion formed as a part of the plate portion is thinned with a step, so that the thin plate portion together with the abrasive particles is a so-called slit portion in another element. It is possible to reliably prevent or suppress the situation where the bite does not come off.

Furthermore , according to the present invention, the maximum outer dimension of the abrasive particles is set to be equal to or smaller than the dimension that enters the curved portion , so that the curved and concave surface of the curved portion can be reliably polished, and such small abrasive grains, even enters the slit of the other elements together with the plate portion of one of the elements, is avoided that not deviate bite into the slit portion, eventually, to the curvature of the curved portion The entire element including the recessed surface can be polished well.

And according to the present invention, since the thin plate portion is formed by further thinning the portion where the plate thickness is reduced by adding a step, any one of them is agitated and polished together with the abrasive particles. It is possible to reliably reduce the possibility that the plate portion of another element is caught in the slit portion of the element together with the abrasive particles and cannot be removed, and thus the element can be polished well.

In addition , according to the present invention, since a part of the plate part is relatively thicker than the other part of the plate part, the strength of the plate part or the element can be increased, and the width of the slit part is increased. Since the plate portion is provided with a portion in which the difference between the difference and the maximum outer dimension of the abrasive particles is larger, so-called biting of the plate portion with respect to the slit portion can be suppressed or prevented.

  Next, the present invention will be specifically described with reference to the drawings. FIG. 1 shows an element 1 according to the present invention. 1A is a front view thereof, and FIG. 1B is a side view thereof. The basic structure of the element 1 shown here is substantially the same as the structure of the element 1 shown in FIG. Therefore, the same parts as those shown in FIG. 3 are denoted by the same reference numerals as those shown in FIG.

  In the element 1 according to the present invention, the thickness of the plate portion 2 that forms the saddle surfaces 11 and 12 (that is, the plate portion 2 that is the lower portion of the saddle surfaces 11 and 12 in the figure) is the slit portion 8. , 9 is set thinner than the width (gap interval) L. Further, the plate thickness of the lower portion (the portion opposite to the neck portion 6 or the top portion 7) of the plate portion 2 from the above-described locking edge 13 in the drawing is further reduced.

  Specifically, the plate thickness gradually decreases from the rocking edge 13 so as to become a linear slope 21, and the first slope is located in the middle of the slope 21, that is, at a position closer to the rocking edge 13 than the lower end of the plate portion 2. A first thin plate portion 23 is formed with a step 22. The plate thickness T23 of the first thin plate portion 23 is substantially constant, but is thinned with a second step 24 at a location closer to the front first step 22 than the lower end of the plate portion 2. Two thin plate portions 25 are formed.

  The plate thicknesses T23 and T25 of the thin plate portions 23 and 25 will be described. The difference between the plate thickness T23 of the first thin plate portion 23 and the width L of the slit portions 8 and 9 is the processing of the R portion 16. The thickness is set to be not more than twice the radius (the diameter or inner diameter of the R portion 16). On the other hand, the thickness T25 of the second thin plate portion 25 is such that the difference from the width L of the slit portions 8 and 9 is twice the processing radius of the R portion 16 (the diameter or inner diameter of the R portion 16). The thickness is set to the above. This is for preventing or suppressing the plate portions 2 of the other elements 1 from being caught in the slit portions 8 and 9 of one of the elements 1 during barrel polishing of the R portion 16.

  That is, in order to barrel polish the R portion 16, it is necessary to insert abrasive particles (that is, a medium) M into the inside thereof, so that the maximum outer dimension of the medium M (the outer diameter if substantially spherical particles) is used. However, the inner diameter of the R portion 16 or less is used. The plate thickness T25 of the second thin plate portion 25 is such that the difference from the width L of the slit portions 8 and 9 is larger than the inner diameter of the R portion 16, so that the width L of the slit portions 8 and 9 is eventually obtained. And the thickness T25 of the second thin plate portion 25 (that is, the space between them) becomes larger than the maximum outer dimension of the medium M. As a result, even if the plate portion 2 of another element 1 enters the slit portions 8 and 9 of any element 1 together with the medium M during barrel polishing of the element 1, the inner surfaces of the slit portions 8 and 9 and the second portion A gap is generated between the thin plate portion 25 and the medium M, and a situation in which they are engaged and cannot be removed does not occur. Moreover, since each thin plate part 23 and 25 is divided by the level | step difference 24, the situation where the medium M which entered into the thin plate part 25 moves gradually to the thin plate part 23 side does not arise, and it is a slit also in this respect The biting of the plate part 2 via the medium M with respect to the parts 8 and 9 can be effectively suppressed or prevented.

The maximum outer dimension of the medium M described above is a dimension at the beginning of use, and the outer dimension of the medium M gradually decreases with use. Therefore, when the barrel polishing of the element 1 is continued, the medium M having a reduced external dimension (or particle size) is the first in the inner surface of the slit portions 8 and 9 and the plate portion 2 of the other element 1 entering here. The length of these portions (the length measured from the locking edge 13 toward the lower end) forms the second thin plate portion 25. Therefore, there is little possibility or difficulty in detaching from the slit portions 8 and 9 due to so-called biting, and there is almost no hindrance to barrel polishing of the element 1.

  The element 1 according to the present invention can be manufactured by pressing using a metal plate as a raw material. In addition, barrel polishing is performed as a polishing process for removing burrs and the like generated in the press process. In that case, since the slit portions 8 and 9 and the plate portion 2 and the thin plate portions 23 and 25 are configured as described above, the medium M for barrel processing has a maximum outer dimension smaller than the inner diameter of the R portion 16. Media M is used.

According to such engagement Ru element to this invention, when the barrel polishing, it is possible to perform the polishing of the entire curved inner surface elements 1 R unit 16 at the same time. Further, a difference between the width L of the slit portions 8 and 9 and the plate thickness T25 of the second thin plate portion 25 is generated between the slit portions 8 and 9 and the second thin plate portion 25 in the plate portion 2 entering here. Since the space interval is larger than the maximum external dimension of the medium M, it is avoided or suppressed that the slit portions 8 and 9 are not engaged with the plate portions 2 of the other elements 1 and cannot be removed. As a result, the entire polishing process of the element 1 including the curved inner surface of the R portion 16 can be performed smoothly.

  The present invention is not limited to the above specific example, and the structure of the plate portion 2 for preventing the slit portions 8 and 9 from being caught is other than the structure of the thin plate portions 23 and 25 described above. There may be. For example, as shown in FIG. 2, a rectangular thin plate portion 26 having a length reaching the lower end may be formed in a comb-teeth shape in about half of the lower portion from the locking edge 13. The plate thickness of the thin plate portion 26 may be the same as or similar to the plate thickness T25 of the second thin plate portion 25 described above. Therefore, in the structure shown in FIG. 2, the concave portion corresponding to the thin plate portion 26 and the convex portions positioned therebetween are alternately arranged in the width direction of the plate portion 2 (left and right direction in FIG. 2). Therefore, the thickness of the convex portion is such that the difference from the width L of the slit portions 8 and 9 is smaller than the maximum outer dimension of the medium M.

  Even in the structure shown in FIG. 2, the space formed between the inner surfaces of the slit portions 8 and 9 and the thin plate portion 26 is larger (wider) than the maximum outer dimension of the medium M. Therefore, the possibility or frequency of the plate portion 2 of the other element 1 being engaged with the media M in the slit portions 8 and 9 of any one of the elements 1 is reduced, and as a result, the barrel polishing of the element 1 is reliably or smoothly performed. be able to.

Incidentally, the media used in barrels Migaku Ken for elements of the invention need not be spherical, prismatic, columnar, may be of various shapes such as irregular cross-sectional shape. In the present invention, the width of the slit portion does not need to be constant. Therefore, as a structure in which the difference between the plate thickness of the plate portion and the width of the slit portion is larger than the maximum external dimension of the media, A structure may be used in which a part of is cut away to increase its width. In FIG. 1A, at least one of the saddle portion side and the ear portion side of the portion close to the neck portion 6 (the portion shown by hatching) inside the slit portions 8 and 9 is connected to the saddle portion or the ear portion. An example of cutting to such an extent that the strength is not impaired is shown. Even with such a structure, it is possible to suppress or prevent so-called biting of the plate portion through the medium with respect to the slit portion.

An example of the element which concerns on this invention is shown, (A) is a front view, (B) is a side view. The other example of the element which concerns on this invention is shown, (A) is a front view, (B) is the side view which carried out the partial cross section. An example of the element used for the belt in the conventional belt-type continuously variable transmission is shown, (A) is a front view, (B) is a side view with a partial cross section.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Element, 2 ... Plate part, 6 ... Neck part, 8, 9 ... Slit part, 16 ... R part, 24 ... Level difference, 25, 26 ... Thin plate part, M ... Media.

Claims (4)

Corners of the slit portion of the predetermined gap distance, a plate portion having a thickest portion thickness Komu Ri enter a thickness in the slit portion, and neck portion projecting from the plate portion, and said neck portion and the plate portion the and a smooth arcuate shape recess processed curved portion, a metallic elementary bets dimensions are polished is stirred with a small lab Migakuyo particles than an inner diameter of the curved portion,
A thin plate portion having a difference the curved inner diameter of a predetermined thickness such as greater than of the gap distance and the plate thickness of the front Symbol slit portion,
A step difference between the plate portion and the thin plate portion;
An element characterized by being formed . A plate portion that is a base portion and a thin plate portion that is partially thinned, a top portion that is extended in an umbrella shape on both the left and right sides in the width direction, and the plate portion at the center portion in the width direction A neck portion that connects the top portion, a slit portion that is formed by a surface that connects the plate portion, the neck portion, and the top portion, respectively, and that opens in the left-right direction in the width direction; and the plate portion and the neck portion The curved portion is formed by recessing the corner portion into a smooth arc shape, and the thin plate portion has a constant thickness such that the gap between the slit portion and the plate thickness is larger than the inner diameter of the curved portion. and, a metallic elementary bets dimensions are polished is stirred with a small lab Migakuyo particles than an inner diameter of the curved portion,
Adjacent to other elements when the plate portion and the top portion of the slit portion are spaced apart from each other and facing each other, and when the elements of the plate portion are in close contact with each other and arranged in an annular shape the difference between the constant thickness with the said thin plate portion in a direction perpendicular to the adjacent surface of the, so as to increase pre-Symbol Ri by the inner diameter of the curved portion, the said slit portion and the front Symbol thin plate portion is constituted An element characterized by Smooth a slit portion having a predetermined gap interval, a plate portion having a thickness in which the thickest portion of the plate enters the slit portion, a neck portion protruding from the plate portion, and a corner portion between the plate portion and the neck portion A metal element that is agitated and polished together with abrasive particles having an inner diameter of the curved portion as a maximum external dimension,
A second thin plate portion having a constant thickness such that a difference between the gap interval of the slit portion and the plate thickness is larger than the inner diameter of the curved portion, and a constant thickness larger than the second thin plate portion. a first sheet metal part with, and the said plate portion first sheet metal part, and of a step for partitioning said first sheet metal part and the second sheet metal part respectively have been made form the characteristics and to Rue Remento. Smooth a slit portion having a predetermined gap interval, a plate portion having a thickness in which the thickest portion of the plate enters the slit portion, a neck portion protruding from the plate portion, and a corner portion between the plate portion and the neck portion A metal element that is agitated and polished together with abrasive particles having a maximum outer dimension of an inner diameter of the curved portion,
A second thin plate portion having a constant thickness such that a difference between the gap interval of the slit portion and the plate thickness is larger than the inner diameter of the curved portion, and a constant thickness larger than the second thin plate portion. first and a thin plate portion, the first sheet metal part and the second feature and to Rue Remento that you and the thin portion are alternately formed in the element width direction with.

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