JP2589260Y2 - Belt tension adjustment device - Google Patents
Belt tension adjustment deviceInfo
- Publication number
- JP2589260Y2 JP2589260Y2 JP1992009245U JP924592U JP2589260Y2 JP 2589260 Y2 JP2589260 Y2 JP 2589260Y2 JP 1992009245 U JP1992009245 U JP 1992009245U JP 924592 U JP924592 U JP 924592U JP 2589260 Y2 JP2589260 Y2 JP 2589260Y2
- Authority
- JP
- Japan
- Prior art keywords
- belt tension
- coil spring
- torsion coil
- fixing member
- pulley
- 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
Links
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、自動車エンジンのタ
イミングベルト等のベルト張力調整装置、いわゆるオー
トテンショナに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt tension adjusting device for a timing belt of an automobile engine, that is, a so-called auto tensioner.
【０００２】[0002]
【従来の技術】従来のベルト張力調整装置においては、
ベルト張力の変動が生じた場合にプーリの揺動を減衰さ
せるためにダンパが設けられ、そのダンパのピストンと
固定部材の傾斜面との間の摩擦力に基づく摩擦トルクに
より、ダンパ効果を発生させるようにしていた。2. Description of the Related Art In a conventional belt tension adjusting device,
A damper is provided to attenuate swinging of the pulley when the belt tension fluctuates, and a damper effect is generated by a friction torque based on a frictional force between the piston of the damper and the inclined surface of the fixed member. Was like that.
【０００３】[0003]
【考案が解決しようとする課題】しかしながら、ベルト
の変動荷重の大きいエンジンの場合は、上記のごときダ
ンパ効果では摩擦トルクが不足し、プーリの揺動を有効
に減衰させることができないという問題があった。However, in the case of an engine having a large fluctuating load on the belt, there is a problem in that the frictional torque is insufficient due to the damper effect as described above, and the swing of the pulley cannot be effectively attenuated. Was.
【０００４】そこで、この考案は張力設定用に用いられ
るねじりコイルばねを有効に利用して、摩擦トルクを増
大せしめ、ダンパ効果を高めることを課題とする。[0004] Therefore, an object of the present invention is to effectively utilize a torsion coil spring used for setting a tension to increase a friction torque and enhance a damper effect.
【０００５】[0005]
【課題を解決するための手段】上記の課題を達成するた
めに、この考案は、固定ボルトのまわりに挿通した固定
スリーブによりプーリ支持体を偏心揺動自在に取付け、
上記固定スリーブの一端を取付基台に当てると共に、他
端に固定部材を当て、上記固定部材及び固定スリーブに
挿通した固定ボルトを上記取付基台に固定し、上記プー
リ支持体と固定部材との間に、上記プーリ支持体がベル
ト張力を減少させる方向に揺動した場合に、ダンパ効果
を奏するダンパを設け、上記プーリ支持体に固定したア
ームに張力設定用のねじりコイルバネの内端を係合し、
外端を上記固定部材に係合させたベルト張力調整装置に
おいて、上記固定部材に円筒状のばね座を嵌着し、その
ばね座のまわりに上記のねじりコイルばねを装着し、上
記ねじりコイルばねの上記内端に近い部分を上記ばね座
の外周面に接触させ、上記ねじりコイルばねの巻き方向
を、上記プーリ支持体がベルト張力を減少させる方向に
揺動した場合に縮径される方向に設定した構成としたも
のである。SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a pulley support which is eccentrically swingable by a fixing sleeve inserted around a fixing bolt.
While applying one end of the fixing sleeve to the mounting base, applying a fixing member to the other end, and fixing the fixing bolt inserted through the fixing member and the fixing sleeve to the mounting base, the pulley support and the fixing member In the meantime, when the pulley support swings in a direction to reduce the belt tension, a damper that exerts a damper effect is provided, and an inner end of a torsion coil spring for setting tension is engaged with an arm fixed to the pulley support. And
In a belt tension adjusting device having an outer end engaged with the fixing member, a cylindrical spring seat is fitted to the fixing member, and the torsion coil spring is mounted around the spring seat. A portion close to the inner end of the torsion coil spring is brought into contact with the outer peripheral surface of the spring seat, and the winding direction of the torsion coil spring is reduced in a direction in which the diameter is reduced when the pulley support swings in a direction to reduce belt tension. This is a set configuration.
【０００６】なお、上記のねじりコイルばねの外端を上
記ばね座を貫通して固定部材に係合させることもでき
る。また、ばね座を合成樹脂製とすることもできる。[0006] The outer end of the torsion coil spring may penetrate the spring seat and engage with the fixing member. Further, the spring seat may be made of synthetic resin.
【０００７】[0007]
【作用】上記構成のベルト張力調整装置においては、ね
じりコイルばねの内端がアームに係合されているため、
その内端に近いばね部分が直線状に引き延ばされ、その
引き延ばされた部分のばね力により、その直線部からわ
ん曲部にわたる範囲のばね部分がばね座に接触してい
る。ベルトの張力が何らかの原因で一定以上の増大した
場合に、その張力を減少させる方向にプーリが揺動する
と、ダンパがダンパ作用をなし、対向面との間の摩擦力
が増大する。またプーリ支持体と一体のアームが揺動
し、ねじりコイルばねの内端が移動する結果、ばねとば
ね座との接触部分において摩擦力が発生する。この摩擦
力と前記のダンパの摩擦力が重畳されるので、大きなダ
ンパ効果が得られる。In the belt tension adjusting device having the above structure, the inner end of the torsion coil spring is engaged with the arm.
The spring portion near the inner end is stretched linearly, and the spring force of the stretched portion contacts the spring portion ranging from the straight portion to the curved portion with the spring seat. When the tension of the belt is increased beyond a certain level for some reason, if the pulley swings in a direction to decrease the tension, the damper acts as a damper, and the frictional force between the belt and the opposing surface increases. Further, as a result of the arm integrated with the pulley support swinging and the inner end of the torsion coil spring moving, a frictional force is generated at the contact portion between the spring and the spring seat. Since this frictional force and the frictional force of the damper are superimposed, a large damper effect can be obtained.
【０００８】また、プーリが前記と逆方向に揺動する場
合、即ちベルト張力を増大させる方向に揺動する場合
は、ダンパの摩擦力及びねじりコイルばねの摩擦力がと
もに小さくなるので、プーリは速やかに揺動する。When the pulley swings in the opposite direction, that is, when the pulley swings in a direction to increase the belt tension, the frictional force of the damper and the frictional force of the torsion coil spring are both reduced. Swing quickly.
【０００９】[0009]
【実施例】図１及び図２に示すように、実施例のベルト
張力調整装置は、固定ボルト１のまわりに、固定スリー
ブ２を挿通し、その固定スリーブ２のまわりに装着した
軸受ブッシュ３を固定スリーブ２の段部４で支持し、更
にその軸受ブッシュ３のまわりにプーリ支持体５を偏心
揺動自在に取付けている。プーリ支持体５の外周には、
軸受６を介してプーリ７を回転自在に取付けている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, in a belt tension adjusting device according to an embodiment, a fixing sleeve 2 is inserted around a fixing bolt 1 and a bearing bush 3 mounted around the fixing sleeve 2 is attached. The fixed sleeve 2 is supported by a step 4 and a pulley support 5 is mounted around the bearing bush 3 so as to be eccentrically swingable. On the outer periphery of the pulley support 5,
A pulley 7 is rotatably mounted via a bearing 6.
【００１０】固定スリーブ２の内端はエンジンブロック
等の取付基台８に押し当てられる。また固定スリーブ２
の外端に円板形の固定部材９が押し当てられる。The inner end of the fixed sleeve 2 is pressed against a mounting base 8 such as an engine block. Also fixed sleeve 2
A disc-shaped fixing member 9 is pressed against the outer end of the fixing member 9.
【００１１】上記の固定部材９及び固定スリーブ２に固
定ボルト１が挿通され、その固定ボルト１を取付基台８
に締付ける。これにより固定部材９は固定スリーブ２を
介して固定ボルト１の頭部で取付基台８に締付けられ
る。The fixing bolt 1 is inserted through the fixing member 9 and the fixing sleeve 2, and the fixing bolt 1 is attached to the mounting base 8.
Tighten to Thereby, the fixing member 9 is fastened to the mounting base 8 by the head of the fixing bolt 1 via the fixing sleeve 2.
【００１２】プーリ支持体５の固定部材９側の面には、
ダンパ１１が設けられる。この場合のダンパ１１は、ダ
ンパ孔１２に挿入したピストン１３をばね１４で押し上
げ、ピストン１３の先端を、スペーサ１５を介して固定
部材９の傾斜面１６に押圧したものである。On the surface of the pulley support 5 on the fixing member 9 side,
A damper 11 is provided. In this case, the damper 11 is configured such that the piston 13 inserted into the damper hole 12 is pushed up by the spring 14 and the tip of the piston 13 is pressed against the inclined surface 16 of the fixing member 9 via the spacer 15.
【００１３】この傾斜面１６は固定部材９のプーリ支持
体５側の面の半分に形成され、ベルト張力が増大した場
合に、これを減少させる方向にプーリ７が揺動する場合
は（図１及び図３の矢印ａ参照）、ピストン１３がダン
パ孔１２に押込まれる方向に傾斜し、逆にベルト張力を
増大させる方向に揺動する場合（矢印ａと反対方向）、
ダンパ孔１２から出る方向に傾斜している。このため、
プーリ７がベルト張力を減少させる方向に揺動する場
合、傾斜面１６における摩擦力は、ストロークの増大と
共に大きくなり（図４のグラフａ1 −ｂ1 参照）、逆に
ベルト張力を増大させる方向に揺動する場合はほぼ零と
なる（図４のグラフｃ1 −ｄ1 参照）という方向性を有
する。The inclined surface 16 is formed on a half of the surface of the fixing member 9 on the side of the pulley support 5, and when the pulley 7 swings in a direction to decrease the belt tension when the belt tension increases (see FIG. 1). When the piston 13 is inclined in the direction of being pushed into the damper hole 12 and oscillates in a direction to increase the belt tension (the direction opposite to the arrow a),
It is inclined in a direction to come out of the damper hole 12. For this reason,
When the pulley 7 swings in the direction of decreasing the belt tension, the frictional force on the inclined surface 16 increases as the stroke increases (see graphs a 1 -b 1 in FIG. 4), and conversely, the direction in which the belt tension increases. In the case of swinging, the direction becomes substantially zero (see the graph c 1 -d 1 in FIG. 4).
【００１４】なお、ダンパ孔１２内のばね１４は角線で
あってもよい。The spring 14 in the damper hole 12 may be square.
【００１５】一方、前記の固定部材９の外周面には、つ
ば付き円筒状のプラスチック製のばね座１７が嵌着され
る。上記のばね座１７のまわりには張力設定用のねじり
コイルばね２２が装着される。このねじりコイルばね２
２の内端はアーム１９に係合され、またその外端はばね
座１７の穴２３又はＵ字形の切欠きを通して固定部材９
の係止穴２４に挿入される。On the other hand, a cylindrical plastic seat 17 with a flange is fitted on the outer peripheral surface of the fixing member 9. A torsion coil spring 22 for setting a tension is mounted around the spring seat 17. This torsion coil spring 2
2 has its inner end engaged with an arm 19 and its outer end through a hole 23 in the spring seat 17 or through a U-shaped cutout.
Is inserted into the locking hole 24.
【００１６】ねじりコイルばね２２を上記のように装着
すると、その内端に近い部分でねじりコイルばね２２の
一部が直線状に引き延ばされ、その直線部からわん曲部
にわたる部分においてねじりコイルばね２２に対する接
触部２５が生じる。その接触部２５から半周した部分
は、図３に示すようにばね座１７から最も遠く離れる。
内端から２周目になると、コイルばね２２はばね座１７
に接触しない。即ち、内端に近い直線部分のばね力によ
りコイルばね２２の一周目の一部がばね座１７に押し付
けられるが、そのばね力が小さくなる２周目以降は次第
にばね座１７から離れることになる。When the torsion coil spring 22 is mounted as described above, a portion of the torsion coil spring 22 is extended linearly at a portion near the inner end, and the torsion coil spring is formed at a portion extending from the linear portion to the curved portion. A contact 25 to the spring 22 is created. The part that has half-periphered from the contact portion 25 is farthest from the spring seat 17 as shown in FIG.
In the second round from the inner end, the coil spring 22 becomes the spring seat 17
Do not touch That is, a part of the first circumference of the coil spring 22 is pressed against the spring seat 17 by the spring force of the linear portion near the inner end, but gradually moves away from the spring seat 17 after the second circumference when the spring force is reduced. .
【００１７】上記のねじりコイルばね２２は、フレッテ
ィング摩耗を防止するため、巻線相互間を接触させない
ように作ることが好ましい。The torsion coil spring 22 is preferably formed so that the windings do not contact each other in order to prevent fretting wear.
【００１８】上記のねじりコイルばね２２の接触部２５
におけるばね座１７に対する摩擦力は、プーリ７が前述
の矢印ａの方向に揺動する場合は、該コイルばね２２の
内端がアーム１９に引張られてばね径を縮小する方向に
揺動するため、大きな摩擦力が発生する（図５のグラフ
ａ2 −ｂ2 参照）。The contact portion 25 of the above-mentioned torsion coil spring 22
When the pulley 7 swings in the direction of the arrow a, the inner end of the coil spring 22 swings in a direction to reduce the spring diameter when the pulley 7 swings in the direction of the arrow a. A large frictional force is generated (see graphs a 2 -b 2 in FIG. 5).
【００１９】逆に、プーリ７が矢印ａと反対方向に揺動
した場合も摩擦力は発生するが、前記の場合より小さく
なる（同図ｃ2 −ｄ2 参照）。なお、図５において、グ
ラフｅはねじりコイルばね２２のばね力を現わす。[0019] Conversely, the frictional force when the pulley 7 is swung in the direction opposite to the arrow a will occur, becomes smaller than the case (see FIG c 2 -d 2). In FIG. 5, a graph e represents the spring force of the torsion coil spring 22.
【００２０】全体の摩擦力は上記の傾斜面１６における
摩擦力と、接触部２５における摩擦力の総和となり（図
６のグラフａ3 −ｂ3 参照）、この総合摩擦力に基づく
摩擦トルクにより、ベルト張力の増大時にこれを減少さ
せる場合にプーリ７には大きなダンパ効果が発生する。
一方、ベルト張力が減少時にこれを増大させる場合は、
プーリ７は前記とは逆方向へ揺動する。この場合の総合
摩擦力は前記の場合より減少する（図６のグラフｃ3 −
ｄ3 参照）。The total frictional force is the sum of the frictional force at the inclined surface 16 and the frictional force at the contact portion 25 (see graphs a 3 -b 3 in FIG. 6). When the belt tension is increased when the belt tension is increased, a large damper effect is generated in the pulley 7.
On the other hand, if the belt tension increases when it decreases,
The pulley 7 swings in a direction opposite to the above. The total frictional force in this case is smaller than that in the above case (graph c 3 − in FIG. 6).
See d 3).
【００２１】なお、図６において、グラフｅは前述と同
様、ねじりコイルばね２２のばね力を現わす。In FIG. 6, a graph e shows the spring force of the torsion coil spring 22 in the same manner as described above.
【００２２】実施例のベルト張力調整装置は以上のごと
きものであり、プーリ７をベルト２６に押し当てると、
ねじりコイルばね２２のばね力と、ベルト張力のバラン
ス点でプーリ７の揺動が停止する。The belt tension adjusting device of the embodiment is as described above. When the pulley 7 is pressed against the belt 26,
The swing of the pulley 7 stops at the balance point between the spring force of the torsion coil spring 22 and the belt tension.
【００２３】この状態から、ベルト２６の張力が増大し
たとすると、その張力を減少させるべくプーリ７が矢印
ａの方向に揺動し、このとき傾斜面１６と接触部２５に
おける摩擦力の総合摩擦力に基づく大きな摩擦トルクが
発生する。また、ベルト２６の張力が減少すると、上記
の場合とは逆に総合摩擦力は小さいので発生する摩擦ト
ルクも小さい。その結果、ベルト張力増大時にダンパ効
果が大きく働き、また減少時に小さく働くという方向性
をもつことになり、ベルト２６の振動発生を防止する。In this state, if the tension of the belt 26 is increased, the pulley 7 swings in the direction of arrow a in order to decrease the tension, and at this time, the total friction of the frictional force between the inclined surface 16 and the contact portion 25 is increased. A large friction torque is generated based on the force. Further, when the tension of the belt 26 decreases, the total frictional force is small, contrary to the above case, so that the generated friction torque is also small. As a result, the damper effect works large when the belt tension increases, and works small when the belt tension decreases, thereby preventing the belt 26 from generating vibration.
【００２４】[0024]
【考案の効果】以上のように、この考案はベルト張力設
定用のねじりコイルばねの一部を固定部材に接触させる
ことによりダンパ単独の場合に比べ大きな摩擦トルクを
発生させることができる。As described above, according to the present invention, a large friction torque can be generated by bringing a part of the torsion coil spring for setting the belt tension into contact with the fixing member, as compared with the case of using only the damper.
【００２５】また、コイルばねは直接固定部材に接触さ
せることなく、両者の間にばね座を介在させているの
で、固定部材の摩耗を防止することができる。Further, since the coil spring has a spring seat interposed therebetween without directly contacting the fixing member, wear of the fixing member can be prevented.
【図１】実施例の平面図FIG. 1 is a plan view of an embodiment.
【図２】図１のII−II線の断面図FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】図１のIII −III 線の断面図FIG. 3 is a sectional view taken along line III-III in FIG. 1;
【図４】プーリストロークと傾斜面の摩擦力の関係を示
すグラフFIG. 4 is a graph showing a relationship between a pulley stroke and a frictional force of an inclined surface.
【図５】プーリストロークとねじりコイルばねのばね力
と摩擦力の関係を示すグラフFIG. 5 is a graph showing a relationship between a pulley stroke, a spring force of a torsion coil spring, and a friction force.
【図６】プーリストロークとねじりコイルばねのばね力
と総合摩擦力の関係を示すグラフFIG. 6 is a graph showing a relationship between a pulley stroke, a spring force of a torsion coil spring, and a total friction force.
１ 固定ボルト ２ 固定スリーブ ３ 軸受ブッシュ ４ 段部 ５ プーリ支持体 ６ 軸受 ７ プーリ ８ 取付基台 ９ 固定部材 １１ ダンパ １２ ダンパ孔 １３ ピストン １４ ばね １５ スペーサ １６ 傾斜面 １７ ばね座 １８ つば １９ アーム ２１ ボス部 ２２ ねじりコイルばね ２３ 穴 ２４ 係止穴 ２５ 接触部 ２６ ベルト DESCRIPTION OF SYMBOLS 1 Fixing bolt 2 Fixing sleeve 3 Bearing bush 4 Step 5 Pulley support 6 Bearing 7 Pulley 8 Mounting base 9 Fixing member 11 Damper 12 Damper hole 13 Piston 14 Spring 15 Spacer 16 Inclined surface 17 Spring seat 18 Collar 19 Arm 21 Boss Part 22 torsion coil spring 23 hole 24 locking hole 25 contact part 26 belt
Claims (3)
ーブによりプーリ支持体を偏心揺動自在に取付け、上記
固定スリーブの一端を取付基台に当てると共に、他端に
固定部材を当て、上記固定部材及び固定スリーブに挿通
した固定ボルトを上記取付基台に固定し、上記プーリ支
持体と固定部材との間に、上記プーリ支持体がベルト張
力を減少させる方向に揺動した場合に、ダンパ効果を奏
するダンパを設け、上記プーリ支持体に固定したアーム
に張力設定用のねじりコイルバネの内端を係合し、外端
を上記固定部材に係合させたベルト張力調整装置におい
て、上記固定部材に円筒状のばね座を嵌着し、そのばね
座のまわりに上記のねじりコイルばねを装着し、上記ね
じりコイルばねの上記内端に近い部分を上記ばね座の外
周面に接触させ、上記ねじりコイルばねの巻き方向を、
上記プーリ支持体がベルト張力を減少させる方向に揺動
した場合に縮径される方向に設定したことを特徴とする
ベルト張力調整装置。1. A pulley supporter is mounted eccentrically and swingably by a fixing sleeve inserted around a fixing bolt, and one end of the fixing sleeve is brought into contact with a mounting base, and the other end of the fixing sleeve is brought into contact with a fixing member. and fixing bolts inserted through the fixed sleeve is fixed to the mounting base, the pulley supporting
The pulley support is belt-tensioned between the holding body and the fixing member.
When swinging in the direction to decrease the force, the damper effect is
The provided damper, engages the inner end of the torsion coil spring for tension set arm fixed to the pulley support, the belt tension adjusting device is engaged with the fixing member to the outer end, the cylindrical to the fixing member fitted to Jo spring seat, the torsion coil spring mounted around the spring seat, it said
The part near the inner end of the torsion coil spring is placed outside the spring seat.
Contact the peripheral surface and change the winding direction of the torsion coil spring,
The pulley support swings in the direction to reduce the belt tension
The belt tension adjusting device is set in a direction in which the diameter is reduced when the belt tension is reduced .
ね座を貫通して固定部材に係合させたことを特徴とする
請求項１に記載のベルト張力調整装置。2. The belt tension adjusting device according to claim 1, wherein an outer end of the torsion coil spring penetrates through the spring seat and is engaged with a fixing member.
特徴とする請求項１又は２に記載のベルト張力調整装
置。3. The belt tension adjusting device according to claim 1, wherein the spring seat is made of a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992009245U JP2589260Y2 (en) | 1992-02-27 | 1992-02-27 | Belt tension adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992009245U JP2589260Y2 (en) | 1992-02-27 | 1992-02-27 | Belt tension adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0569439U JPH0569439U (en) | 1993-09-21 |
| JP2589260Y2 true JP2589260Y2 (en) | 1999-01-27 |
Family
ID=11715029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992009245U Expired - Fee Related JP2589260Y2 (en) | 1992-02-27 | 1992-02-27 | Belt tension adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2589260Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611523B (en) * | 2019-02-20 | 2023-08-22 | 无锡永凯达齿轮有限公司 | High damping timing belt tensioner |
-
1992
- 1992-02-27 JP JP1992009245U patent/JP2589260Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0569439U (en) | 1993-09-21 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |