JP2002031192A - Double cogged belt - Google Patents
Double cogged beltInfo
- Publication number
- JP2002031192A JP2002031192A JP2000215801A JP2000215801A JP2002031192A JP 2002031192 A JP2002031192 A JP 2002031192A JP 2000215801 A JP2000215801 A JP 2000215801A JP 2000215801 A JP2000215801 A JP 2000215801A JP 2002031192 A JP2002031192 A JP 2002031192A
- Authority
- JP
- Japan
- Prior art keywords
- cog
- belt
- valley
- deepest
- pitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、圧縮ゴム層と伸張
ゴム層の両方にコグ部を設けて形成されるダブルコグド
ベルトに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double cogged belt formed by providing cogs on both a compression rubber layer and an extension rubber layer.
【０００２】[0002]
【従来の技術】動力伝動用ベルトとして、圧縮ゴム層と
伸張ゴム層の両方に、ベルト長手方向に沿ってコグ山と
コグ谷とを交互に多数配したコグ部を設けて形成した、
ローエッジダブルコグドベルトとして知られているダブ
ルコグドベルトがある。2. Description of the Related Art As a power transmission belt, a cog portion in which a large number of cog peaks and cog valleys are alternately arranged along the longitudinal direction of the belt is provided on both a compression rubber layer and an extension rubber layer.
There is a double cog belt, known as a low edge double cog belt.
【０００３】図１はこのようなローエッジダブルコグド
ベルトとして知られているダブルコグドベルトＡの一例
を示すものであり、内周側の圧縮ゴム層１と、外周側の
伸張ゴム層５と、両ゴム層１，５間の接着ゴム層１１
と、接着ゴム層１１に埋入された心線１２から構成さ
れ、断面形状を内周側が細くなるＶ字形（逆台形）に形
成してある。そして圧縮ゴム層１の内周側にベルト長手
方向に沿ってコグ山２とコグ谷３を所定の一定ピッチで
交互に多数配置して形成される下コグ部４が設けてあ
り、伸張ゴム層５の外周側にベルト長手方向に沿ってコ
グ山６とコグ谷７を所定の一定ピッチで交互に多数配置
して形成される上コグ部８が設けてある。このように内
周側と外周側にそれぞれコグ山２とコグ谷３からなる下
コグ部４やコグ山６とコグ谷７からなる下コグ部８を設
けることによって、コグドベルトＡはコグ谷３，７の部
分で容易に屈曲することができるものであり、小径のプ
ーリにも使用することが可能になるのである。FIG. 1 shows an example of a double cogged belt A known as such a low edge double cogged belt, in which a compressed rubber layer 1 on an inner peripheral side, an extended rubber layer 5 on an outer peripheral side, and both rubber layers. Adhesive rubber layer 11 between 1 and 5
And a core wire 12 embedded in the adhesive rubber layer 11, and has a V-shaped (inverted trapezoidal) cross-sectional shape having a narrow inner peripheral side. On the inner peripheral side of the compressed rubber layer 1, there is provided a lower cog portion 4 formed by alternately arranging a large number of cog peaks 2 and cog valleys 3 at a predetermined constant pitch along the belt longitudinal direction. An upper cog portion 8 formed by alternately arranging a large number of cog peaks 6 and cog valleys 7 at a predetermined constant pitch along the longitudinal direction of the belt is provided on the outer peripheral side of 5. By providing the lower cog portion 4 composed of the cog peaks 2 and the cog valleys 3 and the lower cog portion 8 composed of the cog peaks 6 and the cog valleys 7 on the inner peripheral side and the outer peripheral side, respectively, the cog belt A can cog valley 3, Since it can be easily bent at the portion 7, it can be used for a small-diameter pulley.
【０００４】従ってダブルコグドベルトＡがプーリの外
周で屈曲される際には、下コグ部４のコグ谷３や上コグ
部８のコグ谷７に曲げの応力が集中する。特に下コグ部
４のコグ谷３は圧縮変形を強く受けるために、このコグ
谷３の最深部に応力が集中し易く、そのためダブルコグ
ドベルトＡの運転時にコグ谷３に繰り返し応力が作用し
て、コグ谷３の最深部に亀裂が生じてベルト破損に至る
おそれがある。Therefore, when the double cog belt A is bent at the outer periphery of the pulley, bending stress concentrates on the cog valley 3 of the lower cog section 4 and the cog valley 7 of the upper cog section 8. In particular, since the cog valley 3 of the lower cog portion 4 is strongly subjected to compressive deformation, stress tends to concentrate on the deepest portion of the cog valley 3, so that the stress repeatedly acts on the cog valley 3 during operation of the double cog belt A, There is a possibility that a crack may be formed at the deepest part of the cog valley 3 and the belt may be damaged.
【０００５】[0005]
【発明が解決しようとする課題】ここで、下コグ部４の
ピッチと上コグ部８のピッチは同寸法ではない場合が多
く、このように下コグ部４のピッチと上コグ部８のピッ
チが異なっていると、下コグ部４のコグ谷３に上コグ部
８のコグ山６がベルト厚み方向で一致する部分もあれ
ば、下コグ部４のコグ谷３に上コグ部８のコグ谷７がベ
ルト厚み方向で一致する部分もある。そして下コグ部４
のコグ谷３の最深部と上コグ部８のコグ谷７の最深部が
ベルト厚み方向で一致していると、このコグ谷３，７の
最深部が一致している部分はベルト厚みが極端に小さく
なるために、ダブルコグドベルトＡが屈曲する際の曲率
は他の部分よりもこの部分が極端に大きくなってこの部
分に作用する応力は他の部分よりも大きくなる。従っ
て、このコグ谷３，７の最深部が一致している部分に早
期に亀裂が生じるおそれがあり、ベルト破損が発生し易
くなるものであった。Here, the pitch of the lower cog portion 4 and the pitch of the upper cog portion 8 are often not the same size. Are different, the cog valley 3 of the lower cog portion 4 has a portion where the cog ridge 6 of the upper cog portion 8 coincides in the belt thickness direction, and the cog valley 3 of the lower cog portion 4 has the cog valley 3 of the upper cog portion 8. There are portions where the valleys 7 coincide in the belt thickness direction. And lower cog part 4
If the deepest part of the cog valley 3 and the deepest part of the cog valley 7 of the upper cog part 8 coincide with each other in the belt thickness direction, the part where the deepest part of the cog valleys 3 and 7 coincides has an extremely large belt thickness. Therefore, the curvature when the double cogged belt A bends becomes extremely large in this portion than in other portions, and the stress applied to this portion becomes larger than that in other portions. Therefore, there is a possibility that a crack may be generated at a portion where the deepest portions of the cog valleys 3 and 7 coincide with each other at an early stage, and the belt is likely to be damaged.
【０００６】本発明は上記の点に鑑みてなされたもので
あり、早期での亀裂の発生を防止してベルト寿命を長く
維持することができるダブルコグドベルトを提供するこ
とを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a double cogged belt capable of preventing the occurrence of cracks at an early stage and maintaining a long belt life. .
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１に係る
ダブルコグドベルトは、圧縮ゴム層１にベルト長手方向
に沿ってコグ山２とコグ谷３を交互に一定ピッチで多数
配して形成される下コグ部４を設けると共に伸張ゴム層
５にベルト長手方向に沿ってコグ山２とコグ谷３を交互
に一定ピッチで多数配して形成される上コグ部８を設け
たダブルコグドベルトにおいて、下コグ部４のコグ谷３
の最深部と上コグ部８のコグ谷７の最深部とがベルト厚
み方向で一致しないように下コグ部４と上コグ部８を形
成して成ることを特徴とするものである。A double cogged belt according to claim 1 of the present invention is formed by arranging a large number of cog peaks 2 and cog valleys 3 alternately at a constant pitch on a compressed rubber layer 1 along the longitudinal direction of the belt. A double cogged belt provided with a lower cog portion 4 provided and an upper cog portion 8 formed by alternately arranging a large number of cog peaks 2 and cog valleys 3 at a constant pitch in the stretched rubber layer 5 along the belt longitudinal direction. , Cog valley 3 in lower cog part 4
The lower cog portion 4 and the upper cog portion 8 are formed so that the deepest portion of the upper cog portion 8 does not coincide with the deepest portion of the cog valley 7 of the upper cog portion 8 in the belt thickness direction.
【０００８】また請求項２の発明は、下コグ部４のコグ
谷３の最深部と上コグ部８のコグ谷７の最深部とが、下
コグ部４のピッチの１／１０以上、ベルト長手方向へず
れていることを特徴とするものである。According to a second aspect of the present invention, the deepest portion of the cog valley 3 of the lower cog portion 4 and the deepest portion of the cog valley 7 of the upper cog portion 8 are at least 1/10 of the pitch of the lower cog portion 4. It is characterized by being shifted in the longitudinal direction.
【０００９】また請求項３の発明は、下コグ部４のピッ
チと上コグ部８のピッチが同ピッチであり、下コグ部４
のコグ谷３と上コグ部８のコグ谷７は１／２ピッチ、ベ
ルト長手方向へずれて形成されていることを特徴とする
ものである。According to a third aspect of the present invention, the pitch of the lower cog portion 4 is equal to the pitch of the upper cog portion 8.
The cog valley 3 and the cog valley 7 of the upper cog portion 8 are formed so as to be shifted by 1/2 pitch in the longitudinal direction of the belt.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。Embodiments of the present invention will be described below.
【００１１】ダブルコグドベルトＡは既述の図１に示す
ように、内周側の圧縮ゴム層１と、外周側の伸張ゴム層
５と、両ゴム層１，５間の接着ゴム層１１を積層一体化
した構造に形成してあり、接着ゴム層１１にはベルト長
手方向に心線１２が埋入してある。そして圧縮ゴム層１
の内周側にベルト長手方向に沿って所定の一定ピッチで
コグ山２とコグ谷３を交互に配置して形成される下コグ
部４が設けてあり、また伸張ゴム層１０の外周側にベル
ト長手方向に沿って所定の一定ピッチでコグ山６とコグ
谷７を交互に配置して形成される上コグ部８が設けてあ
る。As shown in FIG. 1, the double cog belt A is formed by laminating a compressed rubber layer 1 on the inner peripheral side, an extended rubber layer 5 on the outer peripheral side, and an adhesive rubber layer 11 between the two rubber layers 1 and 5. A core wire 12 is embedded in the adhesive rubber layer 11 in the longitudinal direction of the belt. And compressed rubber layer 1
A lower cog portion 4 formed by alternately arranging the cog peaks 2 and the cog valleys 3 at a predetermined constant pitch along the longitudinal direction of the belt is provided on the inner peripheral side of the stretched rubber layer 10. An upper cog portion 8 formed by alternately arranging cog peaks 6 and cog valleys 7 at a predetermined constant pitch along the belt longitudinal direction is provided.
【００１２】ここで、圧縮ゴム層１、伸張ゴム層５、接
着ゴム層１１を形成するゴムとしては、天然ゴム、ブチ
ルゴム、スチレン−ブタジエンゴム、クロロプレンゴ
ム、エチレン−プロピレンゴム、アルキル化クロロスル
フォン化ポリエチレン、水素化ニトリルゴム、水素化ニ
トリルゴムと不飽和カルボン酸金属塩との混合ポリマー
等のゴム材の単独あるいはこれらの混合物の組成物を用
いることができる。そして圧縮ゴム層１や伸張ゴム層５
には繊維を配合して用いるのが好ましい。繊維として
は、アラミド繊維、ポリアミド繊維、ポリエステル繊
維、綿等の繊維を用いることができる。繊維長は繊維の
種類によって異なるが、１〜１０ｍｍの短繊維が用いら
れ、例えばアラミド繊維であると３〜５ｍｍ、ポリアミ
ド繊維、ポリエステル繊維、綿であると５〜１０ｍｍ程
度のものが用いられる。また接着ゴム層１１には繊維を
含有してもよいが、含有しないほうが好ましい。Here, the rubber forming the compression rubber layer 1, the extension rubber layer 5, and the adhesive rubber layer 11 is natural rubber, butyl rubber, styrene-butadiene rubber, chloroprene rubber, ethylene-propylene rubber, alkylated chlorosulfonated rubber. A rubber material such as polyethylene, a hydrogenated nitrile rubber, a mixed polymer of a hydrogenated nitrile rubber and an unsaturated carboxylic acid metal salt, or a composition of a mixture thereof can be used. And the compression rubber layer 1 and the extension rubber layer 5
It is preferable to use a mixture of fibers. As the fibers, fibers such as aramid fibers, polyamide fibers, polyester fibers, and cotton can be used. The fiber length varies depending on the type of fiber, but short fibers of 1 to 10 mm are used. For example, aramid fibers of 3 to 5 mm and polyamide fibers, polyester fibers and cotton of about 5 to 10 mm are used. The adhesive rubber layer 11 may contain fibers, but preferably does not contain fibers.
【００１３】また、心線１２としてはポリエステル繊
維、アラミド繊維、ガラス繊維等のコードをＲＦＬ液で
処理したものを用いることができる。さらに、圧縮ゴム
層１の表面や伸張ゴム層５の表面に補強布を積層するよ
うにしてもよい。このような補強布としては、綿、ポリ
エステル繊維、ナイロン繊維等を平織、綾織、朱子織等
に製織した帆布を用いることができるものであり、ＲＦ
Ｌ液で処理した後、ゴム組成物をフィリクション・コー
チングしたゴム付き帆布として用いるものである。ＲＦ
Ｌ液はレゾルシンとホルマリンとの初期縮合物を、クロ
ロプレン、スチレン・ブタジエン・ビニルピリジン三元
共重合体、水素化ニトリルゴム（Ｈ−ＮＢＲ）、ＮＢＲ
などのラテックスに混合したものである。As the cord 12, a cord obtained by treating a cord of polyester fiber, aramid fiber, glass fiber or the like with an RFL solution can be used. Further, a reinforcing cloth may be laminated on the surface of the compressed rubber layer 1 or the surface of the stretched rubber layer 5. As such a reinforcing cloth, a canvas in which cotton, polyester fiber, nylon fiber, or the like is woven in plain weave, twill weave, satin weave, or the like can be used.
After the treatment with the liquid L, the rubber composition is used as a fiction-coated rubberized canvas. RF
Liquid L is an initial condensate of resorcinol and formalin, chloroprene, styrene-butadiene-vinylpyridine terpolymer, hydrogenated nitrile rubber (H-NBR), NBR
It is mixed with latex such as
【００１４】上記のように形成されるダブルコグドベル
トＡにおいて、下コグ部４と上コグ部８の各コグ谷３，
７は側面視で半円弧形に形成されるが、下コグ部４のコ
グ山２は側面視で半円形の丸形コグに、上コグ部８のコ
グ山６は台形の平形コグにそれぞれ形成するようにして
ある。そして本発明では、ダブルコグドベルトＡの全長
のいかなる部分においても、下コグ部４のコグ谷３の最
深部と上コグ部８のコグ谷７の最深部とがベルト厚み方
向で一致しないように、下コグ部４のコグ山２とコグ谷
３や、上コグ部８のコグ山６とコグ谷７の、配置やピッ
チなどを設定して、下コグ部４と上コグ部８を形成する
ようにしてある。In the double cog belt A formed as described above, each cog valley 3 of the lower cog section 4 and the upper cog section 8
7 is formed in a semicircular arc shape when viewed from the side, the cog peak 2 of the lower cog portion 4 is formed into a semicircular round cog when viewed from the side, and the cog peak 6 of the upper cog portion 8 is formed into a trapezoidal flat cog. It is formed. In the present invention, in any part of the entire length of the double cog belt A, the deepest part of the cog valley 3 of the lower cog part 4 and the deepest part of the cog valley 7 of the upper cog part 8 do not coincide in the belt thickness direction. The lower cog portion 4 and the upper cog portion 8 are formed by setting the arrangement and pitch of the cog peaks 2 and the cog valleys 3 of the lower cog portion 4 and the cog peaks 6 and the cog valleys 7 of the upper cog portion 8. It is.
【００１５】このように、下コグ部４のコグ谷３の最深
部と上コグ部８のコグ谷７の最深部とがベルト厚み方向
で一致しないようにすることによって、下コグ部４のコ
グ谷３の最深部や上コグ部８のコグ谷３の最深部でのベ
ルト厚みは、下コグ部４のコグ谷３の最深部と上コグ部
８のコグ谷７の最深部が一致している場合のように極端
に小さくなることがなくなるものであり、ダブルコグド
ベルトＡが屈曲する際の曲率も極端に大きくなるような
ことがなくなる。従って、下コグ部４のコグ谷３や上コ
グ部８のコグ谷７に大きな応力が作用することを防い
で、この部分に早期に亀裂が生じることを未然に防止す
ることができ、ベルト寿命を長く維持することができる
ものである。As described above, by making the deepest portion of the cog valley 3 of the lower cog portion 4 and the deepest portion of the cog valley 7 of the upper cog portion 8 not coincide with each other in the belt thickness direction, the cog of the lower cog portion 4 is prevented. The belt thickness at the deepest part of the valley 3 and the deepest part of the cog valley 3 of the upper cog part 8 is such that the deepest part of the cog valley 3 of the lower cog part 4 and the deepest part of the cog valley 7 of the upper cog part 8 match. The double cogged belt A does not become extremely large as in the case where the double cogged belt A is bent. Therefore, it is possible to prevent a large stress from acting on the cog valley 3 of the lower cog portion 4 and the cog valley 7 of the upper cog portion 8 and to prevent a crack from being generated in this portion at an early stage. Can be maintained for a long time.
【００１６】ここで、下コグ部４のコグ谷３の最深部と
上コグ部８のコグ谷７の最深部が一致しない度合いは、
コグ谷３とコグ谷７の最深部が相互にベルト長手方向へ
下コグ部４のピッチの１／１０以上ずれているように設
定するのが好ましい。コグ谷３とコグ谷７の最深部のず
れが下コグ部４のピッチＰ1の１／１０未満であると、
この部分での下コグ部４のコグ谷３と上コグ部８のコグ
谷３の底部間でのベルト厚みが極端に小さくなって、ダ
ブルコグドベルトＡが屈曲する際の曲率も極端に大きく
なり、この部分に早期に亀裂が生じることを防止するこ
とが難しくなる。Here, the degree to which the deepest part of the cog valley 3 of the lower cog part 4 does not coincide with the deepest part of the cog valley 7 of the upper cog part 8 is as follows.
It is preferable that the deepest portions of the cog valley 3 and the cog valley 7 are mutually shifted in the belt longitudinal direction by 1/10 or more of the pitch of the lower cog valley 4. When the deviation of the deepest part between the cog valley 3 and the cog valley 7 is less than 1/10 of the pitch P 1 of the lower cog part 4,
In this portion, the belt thickness between the cog valley 3 of the lower cog portion 4 and the bottom of the cog valley 3 of the upper cog portion 8 becomes extremely small, and the curvature when the double cogged belt A bends becomes extremely large. It becomes difficult to prevent a crack from being generated in this portion at an early stage.
【００１７】特に、下コグ部４のピッチＰ1と上コグ部
８のピッチＰ2を同じ寸法に設定し、下コグ部４のコグ
谷３の最深部と上コグ部８のコグ谷７の最深部が相互に
１／２ピッチ位相をずらすように、下コグ部４と上コグ
部８を形成するのが好ましい。このように下コグ部４と
上コグ部８を形成すれば、下コグ部４のコグ谷３に対し
て上コグ部８のコグ山６が、上コグ部８のコグ谷７に対
して下コグ部４のコグ山２が、ダブルコグドベルトＡの
全長に亘ってベルト厚み方向に総て一致することにな
り、下コグ部４のコグ谷３の最深部や上コグ部８のコグ
谷７の最深部でのベルト厚みを確保して、ダブルコグド
ベルトＡが屈曲する際の曲率が大きくならないようにす
ることができ、下コグ部４のコグ谷３や上コグ部８のコ
グ谷７に早期に亀裂が生じることを確実に防止すること
ができるものである。[0017] In particular, setting the pitch P 2 of the pitch P 1 and the upper cog portion 8 of the lower cog portion 4 to the same dimensions, cog troughs 7 of the deepest and the upper cog portion 8 of the cog troughs 3 below cog portion 4 It is preferable to form the lower cog portion 4 and the upper cog portion 8 such that the deepest portions are shifted from each other by a 1/2 pitch phase. When the lower cog portion 4 and the upper cog portion 8 are formed in this manner, the cog hill 6 of the upper cog portion 8 is located below the cog valley 3 of the lower cog portion 4 and is located below the cog valley 7 of the upper cog portion 8. The cog peaks 2 of the cog portion 4 are all coincident in the belt thickness direction over the entire length of the double cog belt A, and the deepest portion of the cog valley 3 of the lower cog portion 4 and the cog valley 7 of the upper cog portion 8 are formed. By securing the belt thickness at the deepest part, the curvature when the double cog belt A is bent can be prevented from increasing, and the cog valley 3 of the lower cog part 4 and the cog valley 7 of the upper cog part 8 can be quickly formed. Cracks can be reliably prevented from occurring.
【００１８】[0018]
【実施例】次に、本発明の効果を実施例によって例証す
る。EXAMPLES Next, the effects of the present invention will be illustrated by examples.
【００１９】（実施例１）ダブルコグドベルトＡとし
て、変速機用ローエッジダブルコグドベルトを用いた。
ここで、ダブルコグドベルトＡはベルト長が１０１９．
７ｍｍ、下コグ部４は丸形３号で、コグ山２（コグ谷
３）のピッチＰ1＝１０．３ｍｍ、コグ山２（コグ谷
３）の数９９、上コグ部８は平形２Ａ号で、コグ山６
（コグ谷７）のピッチＰ2＝９．９ｍｍ、コグ山６（コ
グ谷７）の数１０３である。(Example 1) As a double cog belt A, a low edge double cog belt for a transmission was used.
Here, the double cog belt A has a belt length of 1019.
7 mm, lower cog part 4 is round No. 3, pitch P 1 of cog peak 2 (cog valley 3) = 10.3 mm, number 99 of cog peak 2 (cog valley 3), upper cog part 8 is flat type 2A And Mount Cog 6
The pitch P 2 of (cog valley 7) is 9.9 mm, and the number of cog hills 6 (cog valley 7) is 103.
【００２０】そして直径がそれぞれ１００ｍｍの駆動側
プーリと従動側プーリにダブルコグドベルトＡを懸架
し、無負荷、初張力１９６Ｎ（２０ｋｇｆ）以下、雰囲
気温度１２０℃、回転数５０００ｒｐｍの条件で走行試
験を行なった。走行試験は、下コグ部４のコグ谷３に生
じた亀裂が心線１２に達する時点まで行ない、８本のダ
ブルコグドベルトＡについて走行試験を行なった。A double cogged belt A is suspended on a driving pulley and a driven pulley each having a diameter of 100 mm, and a running test is performed under no load, an initial tension of 196 N (20 kgf) or less, an atmosphere temperature of 120 ° C., and a rotation speed of 5000 rpm. Was. The running test was performed until the crack generated in the cog valley 3 of the lower cog portion 4 reached the core wire 12, and the running test was performed on eight double cog belts A.
【００２１】上記のように走行試験を行なった８本のダ
ブルコグドベルトＡについて、下コグ部４のコグ谷３に
生じている亀裂のうち、心線１２までの距離の１／２以
上に達している亀裂を数えたところ、４５箇所のコグ谷
３にこのような亀裂が生じていた。一方、下コグ部４の
コグ谷３を、このコグ谷３の最深部と上コグ部８のコグ
谷７の最深部との間のずれ（ΔＰ）が、下コグ部４のピ
ッチＰ1の１／１０以下のもの（「〜１／１０」と表
示）、１／１０を超え２／１０以下のもの（「〜２／１
０」と表示）、２／１０を超え３／１０以下のもの
（「〜３／１０」と表示）、３／１０を超え４／１０以
下のもの（「〜４／１０」と表示）、４／１０を超え５
／１０以下のもの（「〜５／１０」と表示）、の５種類
に分類した。そして、上記の亀裂が生じているコグ谷３
はこの５種類のどれに分類されるかをカウントした。そ
の結果を図２のグラフに示す。図２のグラフにみられる
ように、上コグ部８のコグ谷７の最深部との間のずれ
（ΔＰ）が下コグ部４のピッチＰ1の１／１０以下のコ
グ谷３に亀裂が多く発生している。従ってコグ谷３の最
深部と上コグ部８のコグ谷７の最深部との間のずれ（Δ
Ｐ）が下コグ部４のピッチＰ 1の１／１０以上であれ
ば、亀裂の発生を低減できて好ましいことが確認され
る。尚、図２の結果から、下コグ部４のコグ谷３と上コ
グ部８のコグ谷７の最深部のずれを下コグ部４のピッチ
Ｐ1の４／１０以上に設定するのが、特に好ましいとい
うことがわかる。The eight rods subjected to the running test as described above were used.
About Bullcog belt A, in Cog valley 3 of lower cog part 4
Of the cracks that have occurred, 1/2 or less of the distance to the core wire 12
Counting the cracks that have reached the top, 45 Cog valleys
No. 3 had such a crack. On the other hand, the lower cog part 4
Cog valley 3 is cog of deepest part of this cog valley 3 and upper cog section 8
The deviation (ΔP) from the deepest part of the valley 7 is
Switch P1Less than 1/10 of the
), More than 1/10 and not more than 2/10 ("~ 2/1
0 ") More than 2/10 and 3/10 or less
(Displayed as "~ 3/10") More than 3/10 and 4/10 or less
Lower one (displayed as "~ 4/10"), more than 4/10 and 5
/ 5 or less (displayed as "~ 5/10")
Classified. And the Cog valley 3 where the above-mentioned crack occurs
Counted which of the five types was classified. So
Are shown in the graph of FIG. Can be seen in the graph of FIG.
As shown, the gap between the upper cog portion 8 and the deepest portion of the cog valley 7
(ΔP) is the pitch P of the lower cog portion 41Less than 1/10 of
There are many cracks in the valley 3. Therefore, Cog Valley 3
The deviation (Δ) between the deep part and the deepest part of the cog valley 7 of the upper cog part 8
P) is the pitch P of the lower cog portion 4 1At least 1/10 of
It is confirmed that cracks can be reduced
You. In addition, from the result of FIG. 2, the cog valley 3 of the lower cog part 4 and the upper
Displacement of the deepest part of the cog valley 7 of the cog part 8 is the pitch of the lower cog part 4
P1It is particularly preferable to set it to 4/10 or more of
You can see that
【００２２】（実施例２）下コグ部４が丸形３号、上コ
グ部８が平形２Ａ号のダブルコグドベルトＡをＣＡＤ設
計し、三次元ソリッド要素によりその一部をモデル化し
て図３に示す。ダブルコグドベルトＡはその幅方向に線
対称な形状をしているので、図３は対称面から図の手前
側半分のみをモデル化して示している。(Example 2) A double cogged belt A in which the lower cog portion 4 has a round shape No. 3 and the upper cog portion 8 has a flat shape No. 2A is CAD-designed, and a part thereof is modeled by a three-dimensional solid element. Show. Since the double cogged belt A has a shape that is line-symmetric in the width direction, FIG. 3 shows only the front half of the figure as a model from the symmetry plane.
【００２３】そして図３（ａ）のモデルは、下コグ部４
のピッチＰ1と上コグ部８のピッチＰ2を等しく設定し
（Ｐ1＝Ｐ2）、下コグ部４のコグ谷３の最深部と上コグ
部８のコグ谷７の最深部が相互に１／２ピッチずれるよ
うにしたものである。従ってこのものでは、下コグ部４
の総てのコグ谷３に上コグ部８のコグ山６が一致してい
る。The model shown in FIG.
Of set equal pitch P 2 of the pitch P 1 and the upper cog portion 8 (P 1 = P 2), the deepest portion of the cog troughs 7 of the deepest and the upper cog portion 8 mutual cog troughs 3 below cog portion 4 Is shifted by 1/2 the pitch. Therefore, in this case, the lower cog portion 4
The cog hills 6 of the upper cog portion 8 coincide with all the cog valleys 3.
【００２４】（比較例１）図３（ｂ）（ｃ）のモデル
は、下コグ部４のピッチＰ1と上コグ部８のピッチＰ
2を、Ｐ1＝Ｐ2×（１０３／９９）に設定したものであ
り、下コグ部４のコグ谷３の最深部と上コグ部８のコグ
谷７の最深部が一致する部分もあれば、一致しない部分
もある。(Comparative Example 1) The models shown in FIGS. 3B and 3C have a pitch P 1 of the lower cog portion 4 and a pitch P 1 of the upper cog portion 8.
2 is set to P 1 = P 2 × (103/99), and there is a portion where the deepest portion of the cog valley 3 of the lower cog portion 4 and the deepest portion of the cog valley 7 of the upper cog portion 8 coincide. In some cases, they do not match.
【００２５】そして図３（ｂ）では下コグ部４のコグ谷
３の最深部と上コグ部８のコグ谷７の最深部が一致する
部分が左端にくるようにモデルを作成してある。In FIG. 3B, the model is created such that the part where the deepest part of the cog valley 3 of the lower cog part 4 and the deepest part of the cog valley 7 of the upper cog part 8 coincide is at the left end.
【００２６】また図３（ｃ）では下コグ部４のコグ谷３
の最深部と上コグ部８のコグ谷７の最深部がピッチＰ1
の１／２ずれた部分が左端にくるようにモデルを作成し
てある。In FIG. 3C, the cog valley 3 of the lower cog portion 4 is formed.
And the deepest part of the cog valley 7 of the upper cog part 8 is the pitch P 1
The model has been created so that the half-shifted part of is located at the left end.
【００２７】上記の実施例２及び比較例１のダブルコグ
ドベルトＡのモデルについて、有限要素（ＦＥＭ）解析
にて伸張及び屈曲させて下コグ部４のコグ谷３に生じる
応力を比較した。ベルト伸張については、ダブルコグド
ベルトＡをプーリ間に張った状態を想定し、ベルト屈曲
については、ダブルコグドベルトＡをプーリの外周に巻
き掛けた状態を想定している。すなわち、図３のモデル
の対称面を面内に拘束し、またモデルの左端についても
面内に拘束し、そして伸張については、モデルの右端に
荷重をかけて引っ張った状態を、屈曲については、モデ
ルの右端にプーリに巻き付けた場合に対応した回転変位
を与えた状態を、それぞれＦＥＭ解析した。ＦＥＭ解析
の環境は、解析ソフトウェアが米国ＭＳＣ社「ＭＳＣ．
Ｍａｒｃ（Ｋ７．２版）」、解析ハードウェアが米国ヒ
ューレット・パッカード社「Ｃ１６０ ワークステーシ
ョン」である。With respect to the model of the double cog belt A of the above-mentioned Example 2 and Comparative Example 1, the stress generated in the cog valley 3 of the lower cog portion 4 was compared by extending and bending by finite element (FEM) analysis. For belt extension, it is assumed that the double cog belt A is stretched between pulleys, and for belt bending, it is assumed that the double cog belt A is wound around the outer periphery of the pulley. That is, the symmetry plane of the model in FIG. 3 is constrained in the plane, and the left end of the model is also constrained in the plane. FEM analysis was performed on each of the states where a rotational displacement corresponding to the case where the model was wound around a pulley at the right end was applied. The environment of the FEM analysis is as follows.
Marc (K7.2 version) ", and the analysis hardware is Hewlett-Packard's" C160 Workstation "in the United States.
【００２８】ＦＥＭ解析の結果を図４及び図５に示す。
図４は伸張時の変形図を示すものであり、図４（ａ）は
図３（ａ）のモデルの伸張変形を、図４（ｂ）は図３
（ｂ）のモデルの伸張変形を、図４（ｃ）は図３（ｃ）
のモデルの伸張変形をそれぞれ示す。図５は屈曲時の変
形図を示すものであり、図５（ａ）は図３（ａ）のモデ
ルの屈曲変形を、図５（ｂ）は図３（ｂ）のモデルの屈
曲変形を、図５（ｃ）は図３（ｃ）のモデルの屈曲変形
をそれぞれ示す。図４及び図５において下コグ部４のコ
グ谷３に作用する主応力の絶対値の大きさを濃淡で表し
ている。The results of the FEM analysis are shown in FIGS.
FIG. 4 shows a deformation diagram at the time of expansion. FIG. 4A shows expansion deformation of the model of FIG. 3A, and FIG.
FIG. 4C shows the extension deformation of the model shown in FIG.
2 shows the extension deformation of the model. 5A and 5B show deformation diagrams at the time of bending. FIG. 5A shows bending deformation of the model of FIG. 3A, FIG. 5B shows bending deformation of the model of FIG. FIG. 5C shows the bending deformation of the model of FIG. 3C, respectively. 4 and 5, the magnitude of the absolute value of the main stress acting on the cog valley 3 of the lower cog portion 4 is represented by shading.
【００２９】そして伸張時や屈曲時の応力評価を図４及
び図５のモデルの左端の下コグ部４のコグ谷３の最深部
で行ない、その結果を図６のグラフに示す。The stress evaluation at the time of extension or bending is performed at the deepest part of the cog valley 3 of the lower cog part 4 at the left end of the models of FIGS. 4 and 5, and the results are shown in the graph of FIG.
【００３０】図６のグラフにおいて伸張側の結果にみら
れるように、伸張時の応力は実施例２に係る図３（ａ）
のモデルと比較例１に係る図３（ｂ）（ｃ）のモデルの
間に殆ど違いがみられなかった。従って、ダブルコグド
ベルトＡが伸張するときの直線状の変形に対しては、下
コグ部４のコグ谷３と上コグ部８のコグ谷７の配置は影
響しないことがわかる。As can be seen from the results on the extension side in the graph of FIG. 6, the stress at the time of extension is shown in FIG.
3 (b) and 3 (c) according to Comparative Example 1 showed little difference. Therefore, it is understood that the arrangement of the cog valley 3 of the lower cog portion 4 and the cog valley 7 of the upper cog portion 8 do not affect the linear deformation when the double cog belt A is extended.
【００３１】また図６のグラフにおいて屈曲側の結果に
みられるように、下コグ部４のコグ谷３の最深部と上コ
グ部８のコグ谷７の最深部が一致する部分が左端にくる
比較例１に係る図３（ｂ）のモデルでは、主応力の絶対
値が大きいが、下コグ部４のコグ谷３と上コグ部８のコ
グ山５が一致している実施例２に係る図３（ａ）のモデ
ルでは、主応力の絶対値が小さく、実施例２のものでは
下コグ部４のコグ谷３に対する応力を低減できることが
確認される。また下コグ部４のコグ谷３の最深部に対し
て上コグ部８のコグ谷７の最深部がピッチＰ1の１／２
ずれた部分が左端にくる比較例１に係る図３（ｃ）のモ
デルも、主応力の絶対値が小さい。従って、下コグ部４
のコグ谷３の最深部と上コグ部８のコグ谷７の最深部が
一致しないと、下コグ部４のコグ谷３に作用する応力は
小さくなることが確認される。Further, as can be seen from the result on the bending side in the graph of FIG. 6, the portion where the deepest portion of the cog valley 3 of the lower cog portion 4 and the deepest portion of the cog valley 7 of the upper cog portion 8 coincide is at the left end. In the model of FIG. 3B according to Comparative Example 1, the absolute value of the principal stress is large, but according to Example 2 in which the cog valley 3 of the lower cog portion 4 and the cog ridge 5 of the upper cog portion 8 match. In the model of FIG. 3A, it is confirmed that the absolute value of the main stress is small, and the stress of the lower cog portion 4 on the cog valley 3 can be reduced in the second embodiment. The deepest part of the cog valley 7 of the upper cog part 8 is １ ／ of the pitch P 1 with respect to the deepest part of the cog valley 3 of the lower cog part 4.
The model of FIG. 3C according to Comparative Example 1 in which the shifted portion is located on the left end also has a small absolute value of the main stress. Therefore, the lower cog part 4
If the deepest part of the cog valley 3 does not coincide with the deepest part of the cog valley 7 of the upper cog part 8, it is confirmed that the stress acting on the cog valley 3 of the lower cog part 4 becomes smaller.
【００３２】[0032]
【発明の効果】上記のように請求項１の発明は、圧縮ゴ
ム層にベルト長手方向に沿ってコグ山とコグ谷を交互に
一定ピッチで多数配して形成される下コグ部を設けると
共に伸張ゴム層にベルト長手方向に沿ってコグ山とコグ
谷を交互に一定ピッチで多数配して形成される上コグ部
を設けたダブルコグドベルトにおいて、下コグ部のコグ
谷の最深部と上コグ部のコグ谷の最深部とがベルト厚み
方向で一致しないように下コグ部と上コグ部を形成した
ので、下コグ部のコグ谷の最深部や上コグ部のコグ谷の
最深部でのベルト厚みは、下コグ部のコグ谷の最深部と
上コグ部のコグ谷の最深部が一致している部分のように
極端に小さくなることがなく、ダブルコグドベルトが屈
曲する際の曲率も極端に大きくなるようなことがなくな
るものであり、下コグ部のコグ谷や上コグ部のコグ谷に
大きな応力が作用することを防いで、この部分に早期に
亀裂が生じることを未然に防止することができ、ベルト
寿命を長く維持することができるものである。As described above, according to the first aspect of the present invention, the compression rubber layer is provided with a lower cog portion formed by alternately arranging a large number of cog peaks and cog valleys at a constant pitch along the belt longitudinal direction. In a double cogged belt provided with a large number of cog peaks and cog valleys alternately arranged at a constant pitch along the belt longitudinal direction in the stretched rubber layer, the deepest part and the upper cog of the cog valley of the lower cog part The lower cog part and the upper cog part were formed so that the deepest part of the cog valley of the part did not coincide with the belt thickness direction, so the deepest part of the cog valley of the lower cog part and the deepest part of the cog valley of the upper cog part The belt thickness does not become extremely small unlike the part where the deepest part of the cog valley of the lower cog part and the deepest part of the cog valley of the upper cog part match, and the curvature when the double cog belt is bent is also extreme Will not be larger, By preventing a large stress from acting on the cog valley of the upper cog part and the cog valley of the upper cog part, it is possible to prevent the occurrence of a crack in this part at an early stage, and to maintain a long belt life. Things.
【００３３】また請求項２の発明は、下コグ部のコグ谷
の最深部と上コグ部のコグ谷の最深部とが、下コグ部の
ピッチの１／１０以上、ベルト長手方向へずれるように
したので、下コグ部のコグ谷の最深部や上コグ部のコグ
谷の最深部でのベルト厚みが薄くならないようにして、
下コグ部のコグ谷や上コグ部のコグ谷に大きな応力が作
用することを確実に防ぐことができるものである。According to a second aspect of the present invention, the deepest portion of the cog valley of the lower cog portion and the deepest portion of the cog valley of the upper cog portion are shifted in the belt longitudinal direction by 1/10 or more of the pitch of the lower cog portion. So that the belt thickness at the deepest part of the cog valley of the lower cog part and the cog valley of the upper cog part does not become thin,
It is possible to reliably prevent a large stress from acting on the cog valley of the lower cog portion and the cog valley of the upper cog portion.
【００３４】また請求項３の発明は、下コグ部のピッチ
と上コグ部のピッチを同ピッチにし、下コグ部のコグ谷
と上コグ部のコグ谷を１／２ピッチ、ベルト長手方向へ
ずらして形成してあるので、下コグ部のコグ谷と上コグ
部のコグ山及び下コグ部のコグ山と上コグ部のコグ谷が
ベルト全長に亘って総て一致することになり、下コグ部
のコグ谷の最深部や上コグ部のコグ谷の最深部でのベル
ト厚みを確保して、ダブルコグドベルトが屈曲する際の
曲率が大きくならないようにすることができるものであ
り、下コグ部のコグ谷や上コグ部のコグ谷に早期に亀裂
が生じることを確実に防止することができるものであ
る。According to a third aspect of the present invention, the pitch of the lower cog portion is equal to the pitch of the upper cog portion, the cog valley of the lower cog portion and the cog valley of the upper cog portion are １ ／ pitch in the longitudinal direction of the belt. Since it is shifted, the cog valley of the lower cog portion, the cog ridge of the upper cog portion, and the cog valley of the lower cog portion and the cog valley of the upper cog portion all coincide with each other over the entire belt length. By securing the belt thickness at the deepest part of the cog valley of the cog part and the deepest part of the cog valley of the upper cog part, it is possible to prevent the curvature when the double cog belt is bent from increasing. It is possible to reliably prevent the early occurrence of cracks in the cog valley of the upper cog portion and the cog valley of the upper cog portion.
【図１】ダブルコグドベルトの実施の形態の一例を示す
一部破断した斜視図である。FIG. 1 is a partially broken perspective view showing an example of an embodiment of a double cogged belt.
【図２】下コグ部のコグ谷と上コグ部のコグ谷の一致の
度合いと亀裂の発生個所との関係を示すグラフである。FIG. 2 is a graph showing a relationship between a degree of coincidence between a cog valley in a lower cog portion and a cog valley in an upper cog portion and a location where a crack occurs.
【図３】（ａ），（ｂ），（ｃ）はそれぞれＦＥＭ解析
のモデルを示す図である。FIGS. 3 (a), (b), and (c) are views showing models of FEM analysis.
【図４】（ａ），（ｂ），（ｃ）はそれぞれ伸張状態で
のＦＥＭ解析の結果を示す図である。FIGS. 4A, 4B, and 4C are diagrams showing the results of FEM analysis in an extended state, respectively.
【図５】（ａ），（ｂ），（ｃ）はそれぞれ屈曲状態で
のＦＥＭ解析の結果を示す図である。FIGS. 5 (a), (b), and (c) are diagrams showing the results of FEM analysis in a bent state, respectively.
【図６】上記の伸張状態と屈曲状態でのＦＥＭ解析から
得られた主応力のグラフである。FIG. 6 is a graph of principal stress obtained from FEM analysis in the above-mentioned stretched state and bent state.
１ 圧縮ゴム層 ２ コグ山 ３ コグ谷 ４ 下コグ部 ５ 伸張ゴム層 ６ コグ山 ７ コグ谷 ８ 上コグ部 DESCRIPTION OF SYMBOLS 1 Compressed rubber layer 2 Cog peak 3 Cog valley 4 Lower cog part 5 Extension rubber layer 6 Cog peak 7 Cog valley 8 Upper cog part
Claims (3)
グ山とコグ谷を交互に一定ピッチで多数配して形成され
る下コグ部を設けると共に伸張ゴム層にベルト長手方向
に沿ってコグ山とコグ谷を交互に一定ピッチで多数配し
て形成される上コグ部を設けたダブルコグドベルトにお
いて、下コグ部のコグ谷の最深部と上コグ部のコグ谷の
最深部とがベルト厚み方向で一致しないように下コグ部
と上コグ部を形成して成ることを特徴とするダブルコグ
ドベルト。1. A compression rubber layer is provided with a lower cog portion formed by alternately arranging a large number of cog peaks and cog valleys at a constant pitch along a belt longitudinal direction, and a cog along an extension rubber layer along a belt longitudinal direction. In a double cogged belt provided with an upper cog portion formed by alternately arranging a number of peaks and cog valleys at a constant pitch, the deepest portion of the cog valley of the lower cog portion and the deepest portion of the cog valley of the upper cog portion are belt thicknesses. A double cogged belt comprising a lower cog portion and an upper cog portion formed so that they do not coincide in direction.
コグ谷の最深部とが、下コグ部のピッチの１／１０以
上、ベルト長手方向へずれていることを特徴とする請求
項１に記載のダブルコグドベルト。2. The belt according to claim 1, wherein the deepest portion of the cog valley of the lower cog portion and the deepest portion of the cog valley of the upper cog portion are displaced in the belt longitudinal direction by 1/10 or more of the pitch of the lower cog portion. The double cogged belt according to claim 1.
同ピッチであり、下コグ部のコグ谷と上コグ部のコグ谷
は１／２ピッチ、ベルト長手方向へずれて形成されてい
ることを特徴とする請求項１又は２に記載のダブルコグ
ドベルト。3. The pitch of the lower cog portion and the pitch of the upper cog portion are the same pitch, and the cog valley of the lower cog portion and the cog valley of the upper cog portion are formed to be shifted by 1/2 pitch in the belt longitudinal direction. The double cogged belt according to claim 1 or 2, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000215801A JP2002031192A (en) | 2000-07-17 | 2000-07-17 | Double cogged belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000215801A JP2002031192A (en) | 2000-07-17 | 2000-07-17 | Double cogged belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002031192A true JP2002031192A (en) | 2002-01-31 |
Family
ID=18711165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000215801A Pending JP2002031192A (en) | 2000-07-17 | 2000-07-17 | Double cogged belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002031192A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8206251B2 (en) | 2009-04-30 | 2012-06-26 | The Gates Corporation | Double cogged V-belt for variable speed drive |
| US20130190120A1 (en) * | 2009-04-30 | 2013-07-25 | The Gates Corporation | Double cogged v-belt for variable speed drive |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61142937U (en) * | 1985-02-27 | 1986-09-03 | ||
| JPH10323914A (en) * | 1997-05-26 | 1998-12-08 | Mitsuboshi Belting Ltd | Manufacture of cogged belt and mold to be used therefor |
-
2000
- 2000-07-17 JP JP2000215801A patent/JP2002031192A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61142937U (en) * | 1985-02-27 | 1986-09-03 | ||
| JPH10323914A (en) * | 1997-05-26 | 1998-12-08 | Mitsuboshi Belting Ltd | Manufacture of cogged belt and mold to be used therefor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8206251B2 (en) | 2009-04-30 | 2012-06-26 | The Gates Corporation | Double cogged V-belt for variable speed drive |
| US20130190120A1 (en) * | 2009-04-30 | 2013-07-25 | The Gates Corporation | Double cogged v-belt for variable speed drive |
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