JP3755061B2 - Tensioner lever - Google Patents

Tensioner lever Download PDF

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Publication number
JP3755061B2
JP3755061B2 JP01490698A JP1490698A JP3755061B2 JP 3755061 B2 JP3755061 B2 JP 3755061B2 JP 01490698 A JP01490698 A JP 01490698A JP 1490698 A JP1490698 A JP 1490698A JP 3755061 B2 JP3755061 B2 JP 3755061B2
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JP
Japan
Prior art keywords
shoe
arms
arm
tensioner lever
tensioner
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 - Fee Related
Application number
JP01490698A
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Japanese (ja)
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JPH11201246A (en
Inventor
満 六郎木
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Daido Kogyo Co Ltd
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Daido Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daido Kogyo Co Ltd filed Critical Daido Kogyo Co Ltd
Priority to JP01490698A priority Critical patent/JP3755061B2/en
Publication of JPH11201246A publication Critical patent/JPH11201246A/en
Application granted granted Critical
Publication of JP3755061B2 publication Critical patent/JP3755061B2/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H7/00Gearings for conveying rotary motion by endless flexible members
    • F16H7/08Means for varying tension of belts, ropes, or chains
    • F16H2007/0863Finally actuated members, e.g. constructional details thereof
    • F16H2007/0872Sliding members

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  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は駆動軸と従動軸のスプロケットに巻き掛けられたチェーンに、常時適当な緊張力を与える為のテンショナーレバーに関するものである。
【0002】
【従来の技術】
図5は一般的なチェーン駆動装置を表してるが、チェーン1は駆動軸2と従動軸3に取着しているスプロケット4a、4bに巻き掛けられており、該チェーン1はテンショナーレバー5によって押圧されて、適当な緊張力が常時作用している。従って、両スプロケット4a、4bの回転と共に走行するチェーン1の振動を抑制し、従動軸3へ時間の遅れを生じることなく伝達される。又、振動を抑制することでチェーン1に作用する衝撃力はなくなり、チェーン寿命を向上することが出来る。
【0003】
ところで、テンショナーレバー5はテンショナー6によって押圧されてチェーン1に作用しているが、このテンシナーレバー5の形態は色々あり、一般的には金属製アームにゴム製又は樹脂製のシューが接着されたり、シューがアームと一体的に成形されている。そしてテンショナーが当たってテンショナーレバー5をチェーン1に押圧する為のパッドがアームの一部に形成されている。従って、製作工数が高くなってコスト高となり、重量も大きく成ってしまう。
【0004】
テンシュンレバー5の重さは装置全体の重量に影響するのみならず、チェーン1の振動に追従することが出来るように軽くすることが動的性能を向上する上で必要となる。しかし、軽過ぎて強度が低下しないようにアームの断面形状は工夫されているが、軽量化と強度の両立は容易でない。
【0005】
【本発明が解決しようとする課題】
このように従来のテンショナーレバーには上記のごとき問題がある。本発明が解決しようとする課題はこの問題点であり、製作が簡単でコストが安く、又強度を落とすことなく軽量化を図ったテンショナーレバーを提供する。
【0006】
【課題を解決するための手段】
本発明のテンショナーレバーはアームとシューで構成し、アームはアルミ合金製又はスチール製の2枚プレートから成り、シューは耐摩耗性樹脂又は耐摩耗性弾性体のパットから成っている。シューは上記両アームにて挟まれ、そして分離しないようにアームの一方端と約中間部位の少なくとも2か所に設けたブッシュ又はピン等でもって固定している。すなわち、別々に製作したシューと両アームを組み立てして構成する構造と成っている。
【0007】
【発明の実施の形態】
ここでアームはテンショナーレバーの強度を保つ為の部材であり、弓状に湾曲した金属製プレートから成っている。両アームにて挟み込まれるシューはその断面を概略T字状、又は概略I字状等としていて、チェーンが直接接する外周部はアームから突出して両側にガイドを起立している。アームにて挟み込まれる部分の形状は特に限定しない。
【0008】
そして両アームにてシューを挟み込んだ状態で分離しないように、一方端にはピボット軸としてのピン又は軸受けと成るブッシュが設けられ、その他の適当な箇所にも同じくピン又はブッシュを設けて両アームを固定している。適当な箇所に設けたピン又はブッシュはテンショナーが当たるパッドとして機能させることが出来、テンショナーレバーに特別なパッドを設けなくてもよい。以下、本発明に係る実施例を図面に基づいて詳細に説明する。
【0009】
【実施例】
図1は本発明に係るテンショナーレバーの正面図を表している実施例であり、同図に示すように弓型に湾曲している。同図の11はシュー、12はアーム、13、14はブシュをそれぞれ示し、該テンショナーレバー5は両アーム12、12によってシュー11を挟み込み、その状態で分離しないようにブシュ13とブシュ14にて固定している。アーム12はアルミ合金又はスチールが材質として用いられ、シュー11には耐摩耗性の高い樹脂又は弾性体が使用される。
【0010】
図2(a)〜(d)は図1における各断面の拡大図を示しており、(a)はA−A断面であって、シュー11はアーム12、12にて挟み込まれると共に、アーム12の外周部にはチェーン1が直接接する受け部15を有し、受け部15の両側にはガイド16、16を起立していて、チェーン1は受け部15から外れないようになっている。ただし、チェーン幅に対して受け部15の幅が十分に大きな場合、又は他にチェーン外れ止めが設けられている場合には、上記ガイド16、16はなくてもよい。そしてアーム12の一部にはスリット溝が形成され、このスリット溝にはシュー先端の両側へ突出した凸部17が嵌合している。従ってアーム先端は凸部17、17から外れない限り、シュー先端とズレることはない。
【0011】
(b)はC−C断面拡大図である。アーム12、12の幅は大きくなっているが、シュー11の幅は先端とほぼ同じであって、両アーム12、12の内側は空洞化している。(c)はB−B断面拡大図であり、ブシュ14が嵌っている。アーム12、12には穴が形成され、ブシュ14の両サイドはこの穴に嵌合して両アーム12、12はブシュ14から外れないようになっている。シュー11にも穴が貫通してブシュ14が嵌っているが、必ずしも嵌合していなくてもよい。アーム12はシュー1の受け部15と内周縁18とで挟まれる為に、穴は大きな公差とする方が組み立て易い。そして、このブシュ14はテンショナーが当たるパッドとしても機能する。
【0012】
(d)はD−D断面拡大図を示している。アーム12、12及びシュー11の基部にはピボット軸が嵌るブシュ13が取り付けられ、該ブシュ13はアーム12、12に形成している穴に圧入している。従って両アーム12、12はピボット軸部(基部)側においてもブシュ13により固定され、前記ブシュ14と共にアーム12、12はシュー11を挟んだ状態で固定される。(d)に示すD−Dには受け部15が表れていないが、ピボット軸部ではアーム12、12が大きく湾曲している為に受け部15を必要としない。
【0013】
図3は本発明の他の実施例であり、基本的な形状は前記図1に示している場合と同じである。しかし、B−B断面拡大図を(b)に示すごとくシュー11にはブシュ14の嵌合穴は設けられておらず、シュー11の内周がブシュ14に近接している。勿論、両アーム12、12の間にはシュー11が介在して、ブシュ14にて固定されている。
【0014】
図4はさらに別の実施例を表している。A−A断面は前記実施例の場合と同じであるが、B−B断面及びC−C断面、それにD−D断面は違っている。ブシュ14を設けている箇所にはシュー11にカギ19を形成し、該カギ19はブシュ14に係止している。(c)に示すD−D断面にはブシュ13がアーム12、12に嵌っているが、シュー11の基部にはカギ20が形成されていて、カギ20はブシュ13に係止している。従ってシュー11は両カギ19、20がブシュ14、13に係止してアーム12、12から外れないようになっている。
【0015】
(d)はC−C断面拡大図であるが、基本的には前記実施例のC−C断面と同じであるが、シュー11の幅が一段と小さくなっている。ここで、アーム12は弓状を成した板材が使用されているが、強度を増す為に縁にリブを形成してもよい。又上記ブシュ13、14に代わってピンを取り付けすることも出来る。以上述べたように、本発明のテンショナーレバーはシューを両アームにて挟み込んで固定したものであり、次のような効果を得ることが出来る。
【0016】
【発明の効果】
本発明のテンショナーレバーはシューを金属製のアームにて挟み込んだ構造であり、別々に製作したシューとアームを組み立てて両アームをブシュやピン等にて連結固定するだけでよく製作は簡単であり、製作コストも安くなる。そして両側に位置するアームにて強度は十分得ることが出来、しかも軽量化も図られる。一方、使用するチェーンによってシューの材質を適当に選択することも出来、シューが摩耗した際には交換可能となる。
【図面の簡単な説明】
【図1】本発明に係るテンショナーレバーを示す実施例。
【図2】(a)は図1におけるA−A断面拡大図、(b)はC−C断面拡大図、(c)はB−B断面拡大図、(d)はD−D断面拡大図。
【図3】(a)は本発明に係るテンショナーレバーを示す実施例、(b)は(a)におけるB−B断面拡大図。
【図4】(a)は本発明に係るテンショナーレバーを示す実施例、(b)は(a)におけるB−B断面拡大図、(c)はD−D断面拡大図、(d)はC−C断面拡大図。
【図5】一般的なテンショナー装置。
【符号の説明】
1 チェーン
2 駆動軸
3 従動軸
4 スプロケット
5 テンショナーレバー
6 テンショナー
11 シュー
12 アーム
13 ブシュ
14 ブシュ
15 受け部
16 ガイド
17 凸部
18 内周縁
19 カギ
20 カギ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tensioner lever for constantly applying an appropriate tension force to a chain wound around a sprocket of a drive shaft and a driven shaft.
[0002]
[Prior art]
FIG. 5 shows a general chain drive device. The chain 1 is wound around sprockets 4 a and 4 b attached to a drive shaft 2 and a driven shaft 3, and the chain 1 is pressed by a tensioner lever 5. The appropriate tension is always applied. Therefore, the vibration of the chain 1 traveling along with the rotation of both the sprockets 4a and 4b is suppressed, and transmitted to the driven shaft 3 without causing a time delay. Further, by suppressing the vibration, the impact force acting on the chain 1 is eliminated, and the chain life can be improved.
[0003]
By the way, the tensioner lever 5 is pressed by the tensioner 6 and acts on the chain 1, but there are various forms of the tensioner lever 5, and generally a rubber or resin shoe is bonded to a metal arm. Or the shoe is molded integrally with the arm. A pad for hitting the tensioner and pressing the tensioner lever 5 against the chain 1 is formed on a part of the arm. Therefore, the number of manufacturing steps is increased, the cost is increased, and the weight is increased.
[0004]
The weight of the tension lever 5 not only affects the weight of the entire apparatus, but it is necessary to reduce the weight so as to follow the vibration of the chain 1 in order to improve the dynamic performance. However, the cross-sectional shape of the arm is devised so that the strength does not decrease due to being too light, but it is not easy to achieve both weight reduction and strength.
[0005]
[Problems to be solved by the present invention]
As described above, the conventional tensioner lever has the above-described problems. The problem to be solved by the present invention is this problem, and provides a tensioner lever that is easy to manufacture, is low in cost, and is lightweight without reducing its strength.
[0006]
[Means for Solving the Problems]
The tensioner lever of the present invention is composed of an arm and a shoe, the arm is made of a two-plate made of aluminum alloy or steel, and the shoe is made of a pad of wear-resistant resin or wear-resistant elastic body. The shoe is sandwiched between the two arms, and is fixed with bushes or pins provided at at least two positions of one end of the arm and about an intermediate portion so as not to be separated. That is, a structure is formed by assembling separately manufactured shoes and both arms.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Here, the arm is a member for maintaining the strength of the tensioner lever, and is made of a metal plate curved in an arc shape. The shoe sandwiched between both arms has a substantially T-shaped or a substantially I-shaped cross section, and an outer peripheral portion with which the chain is in direct contact protrudes from the arm and stands guides on both sides. The shape of the portion sandwiched between the arms is not particularly limited.
[0008]
In order to prevent the arms from being separated when the shoes are sandwiched between both arms, a pin or a bush serving as a bearing is provided at one end, and pins or bushes are also provided at other appropriate locations, and both arms are provided. Is fixed. Pins or bushes provided at appropriate locations can function as pads against which the tensioner hits, and a special pad need not be provided on the tensioner lever. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
[0009]
【Example】
FIG. 1 is an embodiment showing a front view of a tensioner lever according to the present invention, which is curved in a bow shape as shown in FIG. In the figure, 11 is a shoe, 12 is an arm, and 13 and 14 are bushes. The tensioner lever 5 is sandwiched between the arms 12 and 12 so that the shoe 11 is not separated by the bushes 13 and 14. It is fixed. The arm 12 is made of aluminum alloy or steel, and the shoe 11 is made of a highly wear-resistant resin or elastic body.
[0010]
FIGS. 2A to 2D are enlarged views of each cross section in FIG. 1. FIG. 2A is a cross section taken along the line AA, and the shoe 11 is sandwiched between the arms 12 and 12, and the arm 12. The outer periphery of each of the two has a receiving portion 15 with which the chain 1 is in direct contact, and guides 16 and 16 are erected on both sides of the receiving portion 15 so that the chain 1 does not come off the receiving portion 15. However, when the width of the receiving portion 15 is sufficiently large with respect to the chain width, or when a chain detachment stopper is provided, the guides 16 and 16 may not be provided. A slit groove is formed in a part of the arm 12, and convex portions 17 protruding to both sides of the shoe tip are fitted into the slit groove. Accordingly, the tip of the arm does not deviate from the tip of the shoe as long as it does not deviate from the convex portions 17 and 17.
[0011]
(B) is a CC cross-sectional enlarged view. Although the width of the arms 12 and 12 is large, the width of the shoe 11 is almost the same as the tip, and the inside of both arms 12 and 12 is hollow. (C) is a BB cross-sectional enlarged view, and the bush 14 is fitted. Holes are formed in the arms 12 and 12, and both sides of the bush 14 are fitted into the holes so that the arms 12 and 12 do not come off the bush 14. A hole passes through the shoe 11 and the bush 14 is fitted, but it is not always necessary to fit it. Since the arm 12 is sandwiched between the receiving portion 15 and the inner peripheral edge 18 of the shoe 1, it is easier to assemble the hole with a large tolerance. The bush 14 also functions as a pad against which the tensioner hits.
[0012]
(D) has shown the DD sectional enlarged view. A bush 13 to which a pivot shaft is fitted is attached to the bases of the arms 12 and 12 and the shoe 11, and the bush 13 is press-fitted into holes formed in the arms 12 and 12. Accordingly, the arms 12 and 12 are also fixed by the bush 13 on the pivot shaft (base) side, and the arms 12 and 12 together with the bush 14 are fixed with the shoe 11 sandwiched therebetween. Although the receiving portion 15 does not appear in DD shown in (d), since the arms 12 and 12 are greatly curved in the pivot shaft portion, the receiving portion 15 is not necessary.
[0013]
FIG. 3 shows another embodiment of the present invention, and the basic shape is the same as that shown in FIG. However, as shown in the enlarged cross-sectional view of the B-B cross section in FIG. 5B, the shoe 11 is not provided with the fitting hole of the bush 14, and the inner periphery of the shoe 11 is close to the bush 14. Of course, the shoe 11 is interposed between the arms 12 and 12 and is fixed by the bushing 14.
[0014]
FIG. 4 shows still another embodiment. The AA cross section is the same as that of the above embodiment, but the BB cross section and the CC cross section are different from the DD cross section. A key 19 is formed on the shoe 11 where the bush 14 is provided, and the key 19 is locked to the bush 14. A bush 13 is fitted to the arms 12, 12 in the DD cross section shown in (c), but a key 20 is formed at the base of the shoe 11, and the key 20 is locked to the bush 13. Accordingly, the shoe 11 is configured such that the keys 19 and 20 are locked to the bushes 14 and 13 so as not to be detached from the arms 12 and 12.
[0015]
Although (d) is a CC cross-sectional enlarged view, it is basically the same as the CC cross-section of the above embodiment, but the width of the shoe 11 is further reduced. Here, the arm 12 is made of an arcuate plate, but a rib may be formed on the edge in order to increase the strength. A pin can be attached in place of the bushes 13 and 14. As described above, the tensioner lever of the present invention is such that the shoe is sandwiched and fixed by both arms, and the following effects can be obtained.
[0016]
【The invention's effect】
The tensioner lever of the present invention has a structure in which a shoe is sandwiched between metal arms, and it is easy to manufacture by simply assembling separately manufactured shoes and arms and connecting and fixing both arms with bushings or pins. , Production cost is also reduced. Further, sufficient strength can be obtained by the arms located on both sides, and the weight can be reduced. On the other hand, the material of the shoe can be appropriately selected depending on the chain to be used, and can be replaced when the shoe is worn.
[Brief description of the drawings]
FIG. 1 shows an embodiment of a tensioner lever according to the present invention.
2A is an AA cross-sectional enlarged view in FIG. 1, FIG. 2B is a CC cross-sectional enlarged view, FIG. 2C is a BB cross-sectional enlarged view, and FIG. 2D is a DD cross-sectional enlarged view. .
3A is an embodiment showing a tensioner lever according to the present invention, and FIG. 3B is an enlarged cross-sectional view taken along the line BB in FIG.
4A is an embodiment showing a tensioner lever according to the present invention, FIG. 4B is an enlarged view of a BB section in FIG. 4A, FIG. 4C is an enlarged view of a DD section, and FIG. -C cross-sectional enlarged view.
FIG. 5 shows a general tensioner device.
[Explanation of symbols]
1 Chain 2 Drive shaft 3 Driven shaft 4 Sprocket 5 Tensioner lever 6 Tensioner
11 shoe
12 arms
13 Bush
14 Bush
15 Receiver
16 Guide
17 Convex
18 Inner rim
19 keys
20 keys

Claims (2)

両スプロケットに巻き掛けられたチェーンを押圧して適度な緊張を常時与える為のテンショナー装置におけるテンショナーレバーにおいて、弓状に湾曲した金属製の両アームの間に耐摩耗性の高い樹脂又は弾性体から成るシューを挟み込み、両アームをブシュ又はピン等にて連結固定し、上記シューに受け部を形成してアームの外周に設け、チェーンが直接接する受け部の両側にはガイドを起立したことを特徴とするテンショナーレバー。In the tensioner lever in the tensioner device that always presses the chain wound around both sprockets to give appropriate tension, the metal arm that is curved in a bow shape is made of a highly wear-resistant resin or elastic body. The shoe is sandwiched, the arms are connected and fixed with bushes or pins, etc., a receiving part is formed on the shoe and provided on the outer periphery of the arm, and guides are erected on both sides of the receiving part where the chain directly contacts The tensioner lever. ピボット軸と成る一方端にはブシュを設けて両アームに形成した穴に嵌合し、約中間位置にもブシュを設けて両アームの穴に嵌合し、先端に形成したアームのスリット溝にシューの両側に突出した凸部を嵌合した請求項1記載のテンショナーレバー。  A bushing is provided at one end of the pivot shaft and fitted into a hole formed in both arms, and a bushing is provided at an approximately intermediate position to fit into the hole in both arms, and into the slit groove of the arm formed at the tip. 2. The tensioner lever according to claim 1, wherein convex portions projecting on both sides of the shoe are fitted.
JP01490698A 1998-01-09 1998-01-09 Tensioner lever Expired - Fee Related JP3755061B2 (en)

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Application Number Priority Date Filing Date Title
JP01490698A JP3755061B2 (en) 1998-01-09 1998-01-09 Tensioner lever

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Application Number Priority Date Filing Date Title
JP01490698A JP3755061B2 (en) 1998-01-09 1998-01-09 Tensioner lever

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JPH11201246A JPH11201246A (en) 1999-07-27
JP3755061B2 true JP3755061B2 (en) 2006-03-15

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DE102007015677A1 (en) * 2007-03-31 2008-10-02 Schaeffler Kg Stiffening of components for Zugmittelführungen
JP5541494B2 (en) * 2010-02-04 2014-07-09 Nok株式会社 Chain tensioner
JP7277732B2 (en) * 2019-05-15 2023-05-19 株式会社椿本チエイン tensioner lever

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