JPH0220865B2 - - Google Patents
Info
- Publication number
- JPH0220865B2 JPH0220865B2 JP57148240A JP14824082A JPH0220865B2 JP H0220865 B2 JPH0220865 B2 JP H0220865B2 JP 57148240 A JP57148240 A JP 57148240A JP 14824082 A JP14824082 A JP 14824082A JP H0220865 B2 JPH0220865 B2 JP H0220865B2
- Authority
- JP
- Japan
- Prior art keywords
- sprocket
- endless belt
- belt
- teeth
- hole
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 10
- 239000012779 reinforcing material Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical group ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 230000001613 neoplastic effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G1/00—Driving-belts
- F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Belt Conveyors (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【発明の詳細な説明】
本発明は動力伝達用無端ベルト、特に長手方向
に一定間隔で多数の穴が穿設され、スプロケツト
の歯と噛合することにより効果的に動力を伝達せ
しめる無端ベルトに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endless belt for transmitting power, and particularly to an endless belt having a plurality of holes drilled at regular intervals in the longitudinal direction and effectively transmitting power by meshing with the teeth of a sprocket.
最近、自動車、自動二輪車をはじめとして事務
機器、電機気機器などにおいては、軸間動力伝達
手段としてタイミングベルト等の無端ベルトが多
用されている。ここでタイミングベルトとは第１
図に例示する如く、スプロケツトａと噛合する歯
ｂを所定ピツチで突設したいわゆる歯付ベルトｃ
であり、おもに高分子エラストマーと繊維コード
の複合体で構成されていることから、低騒音、軽
量、注油が不要、安価である等の利点を有する。
しかしその反面、高分子エラストマーあるいは繊
維コード補強材は永久歪、永久伸びを生じやす
く、歯のピツチ間隔に変動が生じ動力伝達効率の
低下を招来し又は屈曲疲労による老化現象等を避
け難い欠点を有する。さらに従来の歯付ベルトｃ
は、スプロケツトａの噛合状態を示す第１図に示
すように、駆動スプロケツトａの歯ｄと歯付ベル
トｃの歯ｂのそれぞれの歯面ｂ１，ｄ１が相互に
当接することにより動力伝達する。したがつて歯
付ベルトｃの歯ｂと本体ｅの境界ｆで極部的な応
力歪を受けこれがピツチの変動、伝達効率低下、
更には屈曲疲労を招来する。本発明者はかかる問
題点について種々研究の結果、歯付ベルトｃの歯
ｂの内側面ｂ２とスプロケツトの歯底面ｄ２との
摩擦力にも分担せしめる構造が有利であることを
見出し本発明を完成した。 BACKGROUND OF THE INVENTION Recently, endless belts such as timing belts have been widely used as means for transmitting power between shafts in automobiles, motorcycles, office equipment, electrical equipment, and the like. What is the timing belt?
As illustrated in the figure, a so-called toothed belt c has teeth b protruding at a predetermined pitch that mesh with a sprocket a.
Since it is mainly composed of a composite of polymer elastomer and fiber cord, it has advantages such as low noise, light weight, no need for lubrication, and low cost.
However, on the other hand, polymer elastomers or fiber cord reinforcing materials tend to suffer from permanent deformation and permanent elongation, leading to fluctuations in the tooth pitch, resulting in a decrease in power transmission efficiency, and the disadvantage that it is difficult to avoid aging phenomena due to bending fatigue. have In addition, the conventional toothed belt c
As shown in FIG. 1, which shows the meshing state of sprocket a, power is transmitted by the tooth surfaces b1 and d1 of teeth d of drive sprocket a and teeth b of toothed belt c coming into contact with each other. Therefore, the boundary f between the teeth b of the toothed belt c and the main body e receives extreme stress and strain, which causes pitch fluctuations, a decrease in transmission efficiency, and
Furthermore, it causes bending fatigue. As a result of various studies regarding this problem, the present inventor found that a structure in which the frictional force is also shared between the inner surface b2 of the tooth b of the toothed belt c and the bottom surface d2 of the sprocket is advantageous, and the present invention was completed. did.
そこで本発明はこのような問題点を解決し高分
子エラストマー及び繊維コード複合体で構成され
るタイミングベルトの本来の利点である低騒音、
軽量化等を保持しながら動力伝達効率を一層高め
るとともに、耐久性を改善した無端ベルトの提供
を目的とし、以下その一実施例を図面に基づき説
明する。 Therefore, the present invention solves these problems and improves the original advantages of timing belts made of polymer elastomer and fiber cord composites, such as low noise and
The purpose of the present invention is to provide an endless belt that further increases power transmission efficiency while maintaining weight reduction, and has improved durability.One embodiment of the belt will be described below with reference to the drawings.
第２〜４図において、本発明の無端ベルト１
は、無端状のベルト本体２に長手方向に一定間隔
をおいてスプロケツト３の歯４と噛合するため略
矩形の穴５が所定のピツチで並設されており、こ
の穴５は、スプロケツトと当接する側即ち内面１
ａからその反対側即ち外面１ｂ迄貫通している。
なお穴５は盲穴状にも形成しうる。該穴５は無端
ベルト１の横断面のほぼ中央部に位置し、その両
側には前記ベルト本体２の厚さ中央を長手方向に
延びる抗張材６が埋設される。この抗張材６は無
端ベルト１が伸張するのを防止し寸法安定性を維
持する機能を有し、モジユラスの高い繊維コード
例えばポリエステル、ナイロン、レーヨン、芳香
族ポリアミド繊維等の有機繊維コードあるいはス
チール、ガラス等の無機繊維コードが用いられる
が、特に好ましくは、弾性率150ｇ／ｄ以上、強
度13ｇ／ｄ以上の芳香族ポリアミド繊維が用いら
れる。ベルト本体２はこの抗張材６を高分子エラ
ストマーの基材中に埋設し構成されるが、ここで
高分子エラストマーとは、クロロプレン、ポリエ
チレン、ポリウレタン、又はポリエステル等でゴ
ム、熱可塑性エラストマー、あるいはプラスチツ
ク等の各種の材質を用いうる。 2 to 4, the endless belt 1 of the present invention
In this case, approximately rectangular holes 5 are arranged in parallel at a predetermined pitch in order to mesh with the teeth 4 of the sprocket 3 at regular intervals in the longitudinal direction in the endless belt main body 2. Contact side, i.e. inner surface 1
It penetrates from a to the opposite side, that is, the outer surface 1b.
Note that the hole 5 can also be formed in the shape of a blind hole. The hole 5 is located approximately at the center of the cross section of the endless belt 1, and a tensile member 6 extending longitudinally through the center of the thickness of the belt body 2 is embedded on both sides thereof. This tensile material 6 has the function of preventing the endless belt 1 from stretching and maintaining dimensional stability, and is a fiber cord with high modulus, such as an organic fiber cord such as polyester, nylon, rayon, or aromatic polyamide fiber, or a steel cord. Inorganic fiber cords such as glass and the like are used, but aromatic polyamide fibers having an elastic modulus of 150 g/d or more and a strength of 13 g/d or more are particularly preferably used. The belt main body 2 is constructed by embedding this tensile material 6 in a base material of a polymeric elastomer. Here, the polymeric elastomer is chloroprene, polyethylene, polyurethane, polyester, etc., and rubber, thermoplastic elastomer, or Various materials such as plastic can be used.
又無端ベルト１は、穴５の両側でスプロケツト
と当接する内面１ａに長手方向にコード織物層７
が配設され、このコード織物層７は、スプロケツ
ト３の歯底面９との摩擦に伴なう摩耗損傷を防止
し、スプロケツト３の歯４と無端ベルト１の穴５
の噛合に加えて、スプロケツト３の歯底面９と無
端ベルト１の内側面１０即ちコード織物層７部分
との間の摩擦力によつて動力伝達を分担しうる。
ここでコード織物層７は、ナイロン、ポリエステ
ル、レーヨン芳香族ポリアミド繊維コードのすだ
れ織物、又は平織物にゴム、又はプラスチツクで
コーチングしたもの、特にナイロンのすだれ織物
にネオプチレンゴム、天然ゴム、又はポリウレタ
ンでコーチングしたものが好適に用いられる。 Furthermore, the endless belt 1 has a cord fabric layer 7 in the longitudinal direction on the inner surface 1a which contacts the sprocket on both sides of the hole 5.
This cord fabric layer 7 prevents wear and damage caused by friction with the tooth bottom surface 9 of the sprocket 3, and prevents the teeth 4 of the sprocket 3 and the holes 5 of the endless belt 1 from being damaged.
In addition to the meshing, power transmission can be shared by the frictional force between the bottom surface 9 of the sprocket 3 and the inner surface 10 of the endless belt 1, that is, the portion of the cord fabric layer 7.
Here, the cord fabric layer 7 is a blind fabric made of nylon, polyester, rayon, aromatic polyamide fiber cord, or a plain weave coated with rubber or plastic, particularly a nylon blind fabric coated with neoplastic rubber, natural rubber, or polyurethane. The one that is used is preferably used.
また無端ベルト１の穴５にはさまれる部分には
補強材１１を配置し長時間使用に伴なうピツチ間
隔の変動を防止する。ここで補強材１１は前記抗
張材６を跨がる長片に該抗張材ａ，ｂ間にのびる
ことにより前記穴５に向いて配される短片を設け
ており、硬質ゴム、プラスチツク等を用いうると
ともに、これにより特に無端ベルトの巾方向に高
い補強性を付与し又前記抗張材６と一体となつて
寸法安定性を維持する。 Further, a reinforcing material 11 is placed in the portion of the endless belt 1 that is sandwiched between the holes 5 to prevent the pitch interval from changing due to long-term use. Here, the reinforcing material 11 is provided with a long piece spanning the tensile material 6 and a short piece extending between the tensile materials a and b to face the hole 5, and is made of hard rubber, plastic, etc. This provides high reinforcing properties, particularly in the width direction of the endless belt, and maintains dimensional stability together with the tensile material 6.
なお本発明の無端ベルト１と組み合せで使用さ
れるスプロケツト３は一般に用いられている形状
のもののほか、第４図に示される如く、円板体の
外周表面即ち歯底面９の中央部に突歯４を突設し
たものが望ましく前記無端ベルト１と噛合するば
あい、歯底面９と前記内側面１０との摩擦力及び
歯４の側面４ａとベルトの穴５の側面５ａとの噛
合力の総合的駆動力で動力は効率的に伝達され
る。 The sprocket 3 used in combination with the endless belt 1 of the present invention has not only a generally used sprocket but also a sprocket 3 having protruding teeth 4 at the center of the outer circumferential surface of the disc body, that is, the bottom surface 9, as shown in FIG. If it is desirable to have a protruding structure and mesh with the endless belt 1, the total of the frictional force between the tooth bottom surface 9 and the inner surface 10 and the meshing force between the side surface 4a of the tooth 4 and the side surface 5a of the hole 5 of the belt. Power is efficiently transmitted through driving force.
上述の如く本発明の無端ベルトは、周方向に一
定間隔でスプロケツトの歯と噛合するための穴を
設けた構造を採用したため、従来の有歯ベルトに
おけるピツチの変動が軽減でき効果的な動力伝達
が可能となるとともに耐久寿命は一層向上する。
なお本発明において、スプロケツト３はその歯底
面９に、歯４の両側又は片側に段差部を設け、前
記コード織物層７をその段差に当接する突条状に
形成するなど、本発明の無端ベルトは種々な態様
のものに変形できる。 As mentioned above, the endless belt of the present invention has a structure in which holes are provided at regular intervals in the circumferential direction to mesh with the teeth of the sprocket, thereby reducing pitch fluctuations in conventional toothed belts and achieving effective power transmission. This makes it possible to further improve durability and service life.
In addition, in the present invention, the sprocket 3 is provided with a stepped portion on both sides or one side of the teeth 4 on the tooth bottom surface 9, and the cord fabric layer 7 is formed in the shape of a protrusion that comes into contact with the stepped portion. can be transformed into various forms.
第１図は従来の有歯ベルトとスプロケツトの噛
合状態を示す概略図、第２図は本発明の無端ベル
トの概略図、第３図は第２図のＡ−Ａ断面図、第
４図はスプロケツトの概略図である。
２……ベルト本体、３……スプロケツト、４…
…歯、５……穴、７……コード織物層、１１……
補強材。
Fig. 1 is a schematic diagram showing the meshing state of a conventional toothed belt and a sprocket, Fig. 2 is a schematic diagram of the endless belt of the present invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a schematic diagram showing the meshing state of a conventional toothed belt and a sprocket. FIG. 3 is a schematic diagram of a sprocket. 2...Belt body, 3...Sprocket, 4...
...teeth, 5...hole, 7...cord fabric layer, 11...
Reinforcement material.
Claims (1)
するための穴を断面中央部で長手方向に一定間隔
で複数個穿設するとともに、前記ベルト本体に、
該ベルト本体の厚さ中央かつ穴の両側を通る抗張
材と、前記穴の両側かつスプロケツトと当接する
側で長手方向に延びしかも同巾で連なるコード織
物層と、穴と穴に挟まれた部分に配されかつ前記
抗張材と跨がる長片に該抗張材間にのびる短片を
一体に設けた補強材とを埋設してなる無端ベル
ト。1. A plurality of holes are drilled in the endless belt main body at regular intervals in the longitudinal direction in the center of the cross section for engaging with the teeth of the sprocket, and the belt main body is provided with
A tensile material passing through the center of the thickness of the belt body and on both sides of the hole, a cord fabric layer extending in the longitudinal direction and having the same width on both sides of the hole and in contact with the sprocket, and a cord fabric layer sandwiched between the holes. An endless belt comprising a reinforcing material in which a reinforcing material is embedded in a long piece disposed in a section and spanning the tensile material, and a reinforcing material integrally provided with a short piece extending between the tensile materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14824082A JPS5937355A (en) | 1982-08-25 | 1982-08-25 | Endless belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14824082A JPS5937355A (en) | 1982-08-25 | 1982-08-25 | Endless belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5937355A JPS5937355A (en) | 1984-02-29 |
| JPH0220865B2 true JPH0220865B2 (en) | 1990-05-10 |
Family
ID=15448373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14824082A Granted JPS5937355A (en) | 1982-08-25 | 1982-08-25 | Endless belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5937355A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833470U (en) * | 1971-08-25 | 1973-04-23 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48102446U (en) * | 1972-03-08 | 1973-12-01 | ||
| JPS50114304U (en) * | 1974-02-28 | 1975-09-18 |
-
1982
- 1982-08-25 JP JP14824082A patent/JPS5937355A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833470U (en) * | 1971-08-25 | 1973-04-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5937355A (en) | 1984-02-29 |
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