JPH081238B2 - Auto tensioner for belt - Google Patents
Auto tensioner for beltInfo
- Publication number
- JPH081238B2 JPH081238B2 JP61189250A JP18925086A JPH081238B2 JP H081238 B2 JPH081238 B2 JP H081238B2 JP 61189250 A JP61189250 A JP 61189250A JP 18925086 A JP18925086 A JP 18925086A JP H081238 B2 JPH081238 B2 JP H081238B2
- Authority
- JP
- Japan
- Prior art keywords
- eccentric member
- fixed
- belt
- movable eccentric
- movable
- 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
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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
- F16H7/1227—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means of the viscous friction type, e.g. viscous fluid
-
- 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/081—Torsion springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、ベルト用オートテンショナ、さらに詳し
くは、自動車のエンジンのクランクシャフトのプーリと
カムシャフトのプーリの間に掛けられたタイミングベル
トなどに所定の張力を付与するオートテンショナに関す
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tensioner for a belt, and more specifically, to a belt such as a timing belt hung between a pulley of a crankshaft and a pulley of a camshaft of an automobile. The present invention relates to an auto tensioner that applies tension.
従来の技術とその問題点 上記のようなタイミングベルトには、エンジンの温度
変化によるベルトの伸縮や使用によるベルトの伸びを吸
収して、ベルトに所定の張力を付与するために、アイド
ラをばねなどの弾性力によりベルトに押付けるオートテ
ンショナが設けられる。また、このようなオートテンシ
ョナには、ベルトの振動やエンジンの振動によるアイド
ラの共振を抑制するために、油圧ダンパが設けられてい
る。ところが、油圧ダンパ式のオートテンショナでは、
油洩れが生じるため、油を供給する必要があり、メンテ
ナンスが面倒である。また、油洩れを防止する機構、オ
リフィスの穴加工やその大きさを調節する機構などが必
要なため、油圧ダンパの構造が複雑で大形になり、オー
トテンショナ全体が高価なものとなる。そして、このよ
うな大形の油圧ダンパとばねなどの弾性体がアイドラお
よびアイドラ取付ブラケットとは別にエンジンの固定部
分とアイドラ取付ブラケット間に取付けられるため、取
扱いが面倒で、取付けスペースが大きなものになる。Conventional technology and its problems In the timing belt as described above, an idler is used as a spring in order to apply a predetermined tension to the belt by absorbing the expansion and contraction of the belt due to the temperature change of the engine and the elongation of the belt due to use. An automatic tensioner that presses against the belt by the elastic force of is provided. In addition, such an autotensioner is provided with a hydraulic damper in order to suppress idler resonance caused by belt vibration or engine vibration. However, in the hydraulic damper type auto tensioner,
Since oil leakage occurs, it is necessary to supply oil and maintenance is troublesome. Further, since a mechanism for preventing oil leakage, a mechanism for forming a hole in the orifice and a mechanism for adjusting the size thereof are required, the structure of the hydraulic damper becomes complicated and large, and the entire auto tensioner becomes expensive. Since such a large hydraulic damper and elastic body such as a spring are mounted between the fixed part of the engine and the idler mounting bracket separately from the idler and the idler mounting bracket, the handling is troublesome and the mounting space is large. Become.
この発明の目的は、上記の問題を解決し、構造が簡単
で、安価で小形化が可能であり、よって取扱いが簡単で
取付けスペースが小さくてすむベルト用オートテンショ
ナを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic tensioner for a belt that solves the above problems, has a simple structure, is inexpensive, and can be downsized, and is therefore easy to handle and requires a small installation space.
問題点を解決するための手段 この発明によるベルト用オートテンショナは、固定部
分に固定される円柱状の固定部材と、同固定部材の外周
面に偏心状かつ回転自在に嵌合された円柱状の可動偏心
部材と、同可動偏心部材の外側に回転自在に取付けられ
てベルトに接触する円筒状の外側部材と、同外側部材が
ベルトに圧接する方向に上記可動偏心部材を付勢するば
ねとを備えており、上記固定部材の外周面と同外周面に
対向する上記可動偏心部材の嵌合面との間に上記可動偏
心部材を回転自在に支持するための隙間が設けられ、こ
の可動偏心部材を回転自在に支持するための隙間の両端
部相互間にシールが設けられ、これらのシールの間の上
記隙間に高粘度の油が介在させられているものである。Means for Solving Problems A belt autotensioner according to the present invention has a cylindrical fixing member fixed to a fixed portion and a cylindrical fixing member eccentrically and rotatably fitted to an outer peripheral surface of the fixing member. A movable eccentric member, a cylindrical outer member rotatably attached to the outside of the movable eccentric member and contacting the belt, and a spring for urging the movable eccentric member in a direction in which the outer member presses against the belt. A gap for rotatably supporting the movable eccentric member is provided between the outer peripheral surface of the fixed member and the fitting surface of the movable eccentric member facing the outer peripheral surface, and the movable eccentric member is provided. Seals are provided between both ends of the gap for rotatably supporting the oil, and high-viscosity oil is interposed in the gap between the seals.
作 用 温度変化や使用などによりベルトが伸びて張力が小さ
くなろうとすると、ばねの弾性力により可動偏心部材が
張力を増す方向に回転し、張力が所定の値に保持され
る。逆に、温度変化などによりヘルトが縮んで張力が大
きくなろうとすると、ばねの弾性力に抗して可動偏心部
材が張力を減らす方向に回転し、張力が所定の値に保持
される。このとき、ベルトの伸びまたは縮みは非常に緩
やかであるから、可動偏心部材の回転速度も非常に小さ
く、油が可動偏心部材の回転を拘束することはない。ま
た、ベルトの振動やエンジンの振動による外側部材およ
び可動偏心部材の振動は、固定部材と可動偏心部材の間
にある高粘度の油の粘性抵抗（剪断抵抗）により抑制さ
れる。When the tension of the belt tends to decrease due to the change of the working temperature or the use of the belt, the elastic force of the spring causes the movable eccentric member to rotate in the direction of increasing the tension, and the tension is maintained at a predetermined value. On the contrary, when the Hert contracts due to a temperature change and the tension tends to increase, the movable eccentric member rotates in the direction of reducing the tension against the elastic force of the spring, and the tension is maintained at a predetermined value. At this time, since the expansion or contraction of the belt is very gentle, the rotation speed of the movable eccentric member is also very small, and the oil does not restrain the rotation of the movable eccentric member. Further, the vibration of the outer member and the movable eccentric member due to the vibration of the belt and the vibration of the engine is suppressed by the viscous resistance (shear resistance) of the highly viscous oil between the fixed member and the movable eccentric member.
固定部材の外周面とこれに対向する可動偏心部材の嵌
合面との間には、可動偏心部材を回転自在に支持するた
めに隙間が設けられる。そして、この可動偏心部材を回
転自在に支持するための回転支持部分の隙間の両端部に
シールを設けて、この隙間だけをダンパ用の高粘度の油
を介在させるための隙間として利用しているので、回転
支持部分の外側に油圧ダンパや高粘度の油を介在させる
ための隙間を設ける場合に比べて、構造が簡単で、小形
になり、コスト的にも安価なものとなる。A gap is provided between the outer peripheral surface of the fixed member and the fitting surface of the movable eccentric member facing the fixed member so as to rotatably support the movable eccentric member. Then, seals are provided at both ends of the gap of the rotation support portion for rotatably supporting the movable eccentric member, and only this gap is used as a gap for interposing high-viscosity oil for damper. Therefore, as compared with the case where a hydraulic damper or a gap for interposing a high-viscosity oil is provided outside the rotation supporting portion, the structure is simple, the size is small, and the cost is low.
高粘度の油によるダンパ効果を高めるためには、これ
を介在させる隙間の寸法管理が重要である。固定部材の
外周面と可動偏心部材の嵌合面との間の回転支持部分の
隙間の大きさは、これらの面の加工精度によってほぼ決
まり、組立て精度の影響をほとんど受けない。そして、
固定部材の外周面や可動偏心部材の嵌合面のような円筒
面を高精度に加工することは容易であるから、隙間の寸
法管理も容易である。In order to enhance the damper effect of high-viscosity oil, it is important to control the size of the gap in which it is interposed. The size of the gap of the rotation supporting portion between the outer peripheral surface of the fixed member and the fitting surface of the movable eccentric member is substantially determined by the processing accuracy of these surfaces and is hardly affected by the assembly accuracy. And
Since it is easy to process a cylindrical surface such as the outer peripheral surface of the fixed member or the fitting surface of the movable eccentric member with high accuracy, it is easy to control the size of the gap.
油の粘度は、ベルトなどの振動の特性、固定部材およ
び可動偏心部材の形状、寸法などを考慮して決定される
が、粘度の高いものを使用するほどオートテンショナを
小形にすることができる。The viscosity of oil is determined in consideration of the vibration characteristics of the belt and the like, the shapes and dimensions of the fixed member and the movable eccentric member, and the higher the viscosity, the smaller the autotensioner can be made.
実 施 例 以下、図面を参照して、この発明を自動車のエンジン
のタイミグベルトに適用した実施例を説明する。Example An example in which the present invention is applied to a timing belt of an automobile engine will be described below with reference to the drawings.
図面にオートテンショナは１本のボルト（10）に全て
の部品が取付けられたユニット状のものであり、このボ
ルト（10）によりエンジンの固定部分（たとえばエンジ
ンブロック）（11）に固定されている。In the drawing, the auto tensioner is a unit with all parts attached to one bolt (10) and is fixed to the fixed part of the engine (for example, engine block) (11) by this bolt (10). .
ボルト（10）の中間部に止め輪（12）が取付けられ、
ボルト（10）の頭（10a）とこの止め輪（12）の間に、
座金（13）、第１の偏心円板（14）、円柱状の固定偏心
部材（固定部材）（15）および第２の偏心円板（16）が
回転はしうるが軸方向にはほとんど移動しないように取
付けられている。２つの偏心円板（14）（16）は固定偏
心部材（15）より少し大きい外径を有し、固定ピン（1
7）（18）により固定偏心部材（15）の両端に同心状に
固定されている。固定偏心部材（15）と偏心円板（14）
（16）には偏心穴（19）（20）（21）が形成されてお
り、これらにボルト（10）が通されている。ボルト（1
0）を締付けることにより、座金（13）、第１の偏心円
板（14）、固定偏心部材（15）および第２の偏心円板
（16）がボルト（10）の頭（10a）と固定部分（11）の
間に挾み止められる。このとき、第２の偏心円板（16）
が固定部分（11）に圧接するように、止め輪（12）はこ
の偏心円板（16）の偏心穴（21）の端部に形成された大
径部（21a）内に位置している。そして、振動などによ
り第２の偏心円板（16）が滑って回転したりボルト（1
0）が緩んだりすることがないように、固定部分（11）
と接触する偏心円板（16）の端面には、図示は省略した
が、ローレット加工や放射状のみぞなどによる凹凸が形
成されている。また、ボルト（10）を緩めて固定偏心部
材（15）を回転させることにより、その取付角度を任意
に調節することができ、ボルト（10）を締付けることに
より、固定偏心部材（15）を所望の角度に固定すること
ができる。A retaining ring (12) is attached to the middle of the bolt (10),
Between the head (10a) of the bolt (10) and this retaining ring (12),
The washer (13), the first eccentric disc (14), the columnar fixed eccentric member (fixing member) (15) and the second eccentric disc (16) can rotate but almost move in the axial direction. It is installed not to. The two eccentric discs (14) (16) have an outer diameter slightly larger than that of the fixed eccentric member (15), and the fixed pin (1
It is fixed concentrically to both ends of the fixed eccentric member (15) by (7) and (18). Fixed eccentric member (15) and eccentric disc (14)
Eccentric holes (19), (20) and (21) are formed in (16), and bolts (10) are passed through these. Bolt (1
The washer (13), the first eccentric disc (14), the fixed eccentric member (15) and the second eccentric disc (16) are fixed to the head (10a) of the bolt (10) by tightening (0). It is held between the parts (11). At this time, the second eccentric disc (16)
The retaining ring (12) is located in the large diameter portion (21a) formed at the end of the eccentric hole (21) of the eccentric disc (16) so that the pressure ring contacts the fixed portion (11). . Then, the second eccentric disc (16) slides and rotates due to vibration or the like, or the bolt (1
Fixing part (11) so that (0) does not come loose
Although not shown, the end surface of the eccentric disc (16) that comes into contact with is formed with concavities and convexities by knurling or radial grooves. Also, by loosening the bolt (10) and rotating the fixed eccentric member (15), the mounting angle can be arbitrarily adjusted, and by tightening the bolt (10), the fixed eccentric member (15) is desired. It can be fixed at any angle.
固定偏心部材（15）の外側に、円柱状の可動偏心部材
（22）が回転自在に支持されて取付けられている。可動
偏心部材（22）には偏心穴（23）が形成され、この偏心
穴（23）に固定偏心部材（15）がはめられている。固定
偏心部材（15）の外周面とこれに対向する可動偏心部材
（22）の偏心穴（23）の内面との回転支持部分の隙間は
最小に押えられており、この部分にはたとえば粘度が10
0000cst（25℃）以上のシリコーンオイル（Ｏ）が介在
させられて、可動偏心部材（22）の回転トルクが大きく
されている。なお、この回転トルクは、オイルの粘度の
他に、固定偏心部材（15）の外径および長さ、可動偏心
部材（22）との隙間の大きさによって設定される。ま
た、固定偏心部材（15）と可動偏心部材（22）の両端部
相互間に、オイル（Ｏ）を封止するＯリング（24）が設
けられている。A cylindrical movable eccentric member (22) is rotatably supported and attached to the outside of the fixed eccentric member (15). An eccentric hole (23) is formed in the movable eccentric member (22), and a fixed eccentric member (15) is fitted in the eccentric hole (23). The clearance between the outer peripheral surface of the fixed eccentric member (15) and the inner surface of the eccentric hole (23) of the movable eccentric member (22) facing the fixed eccentric member (15) is kept to a minimum, and this portion has, for example, a viscosity. Ten
The rotation torque of the movable eccentric member (22) is increased by interposing the silicone oil (O) of 0000 cst (25 ° C.) or higher. In addition to the oil viscosity, this rotational torque is set by the outer diameter and length of the fixed eccentric member (15) and the size of the gap between the fixed eccentric member (22) and the movable eccentric member (22). Further, an O-ring (24) for sealing oil (O) is provided between both ends of the fixed eccentric member (15) and the movable eccentric member (22).
可動偏心部材（22）の外側に、円筒状の外側部材（2
5）が複数の球状転動体（26）を介して回転はしうるが
軸方向にはほとんど移動しないように取付けられてい
る。第１の偏心円板（14）の外周の一部に切欠き（27）
が形成されており、この切欠き（27）に対応する可動偏
心部材（22）の端面にばね穴（28）が形成されている。
また、第１の偏心円板（14）およびこれに接する固定偏
心部材（15）の端面にも、連続したばね穴（29）（30）
が形成されている。そして、可動偏心部材（22）を第２
図および第３図の時計方向に付勢するねじりコイルばね
（31）の外側端部（31a）が可動偏心部材（22）のばね
穴（28）に、内側端部（31b）が第１の偏心円板（14）
および固定偏心部材（15）のばね穴（29）（30）にはめ
止められており、このばね（31）の弾性力により、外側
部材（25）がタイミングベルト（32）の歯（33）のない
面に押付けられている。第１の偏心円板（14）の切欠き
（27）は可動偏心部材（22）の回転角度すなわちオート
テンショナの作動角を規制するものであり、可動偏心部
材（22）はばね（31）の外側端部（31a）が切欠き（2
7）の一端部に当る位置と切欠きの他端部に当る位置と
の間を回転することができ、可動偏心部材（22）が第２
図および第３図の時計方向に回転することによりベルト
（32）の張力が増加し、同図の反時計方向に回転するこ
とによりベルト（32）の張力が減少する。なお、ばね
（31）の内側端部（31b）寄りの部分は、ボルト（10）
を締付けたときに第１の偏心円板（14）に押付けられる
ことがないように、座金（13）のフランジ部（13a）と
第１の偏心円板（14）の間に緩くはめられている。On the outside of the movable eccentric member (22), a cylindrical outer member (2
5) can be rotated through a plurality of spherical rolling elements (26), but is mounted so as to hardly move in the axial direction. Notch (27) on part of the outer circumference of the first eccentric disc (14)
Is formed, and a spring hole (28) is formed in the end surface of the movable eccentric member (22) corresponding to the notch (27).
Further, continuous spring holes (29) (30) are also formed on the end faces of the first eccentric disc (14) and the fixed eccentric member (15) in contact therewith.
Are formed. Then, the movable eccentric member (22) is attached to the second
The outer end (31a) of the torsion coil spring (31) biased clockwise in FIGS. 3 and 4 is in the spring hole (28) of the movable eccentric member (22), and the inner end (31b) is the first end. Eccentric disc (14)
And fixed to the spring holes (29) and (30) of the fixed eccentric member (15), the elastic force of the spring (31) causes the outer member (25) to move to the teeth (33) of the timing belt (32). It is pressed against the non-exposed surface. The notch (27) of the first eccentric disc (14) regulates the rotation angle of the movable eccentric member (22), that is, the working angle of the auto tensioner, and the movable eccentric member (22) is provided in the spring (31). The outer edge (31a) has a notch (2
The movable eccentric member (22) can be rotated between the position where it contacts one end of 7) and the position where it contacts the other end of the notch.
Rotation in the clockwise direction in the figures and FIG. 3 increases the tension of the belt (32), and rotation in the counterclockwise direction in the same figure decreases the tension of the belt (32). In addition, the portion near the inner end (31b) of the spring (31) is the bolt (10).
It is loosely fitted between the flange part (13a) of the washer (13) and the first eccentric disc (14) so that it will not be pressed against the first eccentric disc (14) when tightened. There is.
第１の偏心円板（14）の外周寄りの部分にこれを貫通
するセットピン穴（34）が形成され、可動偏心部材（2
2）の端面にはこれに対応するセットピン穴（35）が設
けられている。A set pin hole (34) is formed in a portion of the first eccentric disc (14) near the outer periphery to penetrate the movable eccentric member (2).
Corresponding set pin holes (35) are provided on the end face of 2).
上記のオートテンショナは、たとえば次のようにして
固定部材（11）に取付けられる。The above-mentioned auto tensioner is attached to the fixing member (11) as follows, for example.
取付けに先立ち、第１の偏心円板（14）のセットピン
穴（34）と可動偏心部材（22）のセットピン穴（35）を
合致させて、これらにセットピン（図示略）をさし通
し、これにより、固定偏心部材（15）と可動偏心部材
（22）を相互に回転しないように固定しておく。このよ
うな状態で、固定部分（11）にボルト（10）を緩くねじ
はめ、ベルト（32）の張力が所定の初期設定値になるよ
うに固定偏心部材（15）の取付角度を調節したのち、ボ
ルト（10）を締付けて固定偏心部材（15）を固定する。
なお、このような初期調節を容易にするため、第１の偏
心円板（14）に六角穴などの異形穴をあけておき、六角
Ｌ形レンチなどの適当な治具をこの異形穴に挿入し、こ
の治具をてこにして固定偏心部材（15）を回転させるよ
うにすることもできる。ベルト（32）の張力初期設定が
終了したならば、セットピンを抜き取って、可動偏心部
材（22）を回転しうる状態にする。これにより、ばね
（31）の弾性力とベルト（32）の張力が所定値につり合
い、以後は、次のように、シリコーンオイル（Ｏ）をダ
ンパとして、ベルト（32）の張力が自動調節される。Prior to mounting, align the set pin hole (34) of the first eccentric disc (14) with the set pin hole (35) of the movable eccentric member (22) and insert a set pin (not shown) into them. Through this, the fixed eccentric member (15) and the movable eccentric member (22) are fixed so as not to rotate relative to each other. In this state, loosely screw the bolt (10) to the fixed part (11) and adjust the mounting angle of the fixed eccentric member (15) so that the tension of the belt (32) may reach a predetermined initial setting value. , Tighten the bolts (10) to fix the fixed eccentric member (15).
In order to facilitate such initial adjustment, a modified hole such as a hexagonal hole is made in the first eccentric disc (14), and an appropriate jig such as a hexagonal L-shaped wrench is inserted into this modified hole. However, the fixed eccentric member (15) can be rotated by using this jig as a lever. When the initial tension setting of the belt (32) is completed, the set pin is pulled out so that the movable eccentric member (22) can be rotated. As a result, the elastic force of the spring (31) and the tension of the belt (32) are balanced to a predetermined value, and thereafter, the tension of the belt (32) is automatically adjusted using silicone oil (O) as a damper as follows. It
温度変化や使用などによりベルト（32）が伸びて張力
が小さくなろうとすると、ばね（31）の弾性力により可
動偏心部材（22）が張力を増す方向（第２図および第３
図の時計方向）に回転し、張力が所定の値に保持され
る。逆に、温度変化などによりベルト（32）が縮んで張
力が大きくなろうとすると、ばね（31）の弾性力に抗し
て可動偏心部材（22）が張力を減らす方向（第２図およ
び第３図の反時計方向）に回転し、張力が所定の値に保
持される。このとき、ベルト（32）の伸びまたは縮みは
非常に緩やかであるから、可動偏心部材（22）の回転速
度も非常に小さく、シリコーンオイル（Ｏ）が可動偏心
部材（22）の回転を拘束することはない。また、ベルト
（32）の振動やエンジンの振動による外側部材（25）お
よび可動偏心部材（22）の振動は、シリコーンオイル
（Ｏ）の回転に対する粘性抵抗（剪断抵抗）により抑制
される。When the tension of the belt (32) is reduced due to temperature change or use, the elastic force of the spring (31) increases the tension of the movable eccentric member (22) (see FIGS. 2 and 3).
The tension is maintained at a predetermined value by rotating in the clockwise direction in the figure). On the contrary, when the tension of the belt (32) is increased due to the temperature change and the like, the movable eccentric member (22) reduces the tension against the elastic force of the spring (31) (see FIGS. 2 and 3). It rotates in the counterclockwise direction in the figure) and the tension is maintained at a predetermined value. At this time, since the expansion or contraction of the belt (32) is very gentle, the rotation speed of the movable eccentric member (22) is also very small, and the silicone oil (O) restrains the rotation of the movable eccentric member (22). There is no such thing. Further, the vibration of the outer member (25) and the movable eccentric member (22) due to the vibration of the belt (32) and the vibration of the engine are suppressed by viscous resistance (shear resistance) to the rotation of the silicone oil (O).
固定偏心部材（15）と可動偏心部材（22）の隙間にシ
リコーンオイル（Ｏ）を介在させるには、固定偏心部材
（15）の外周面および可動偏心部材（22）の偏心穴（2
3）の内面のいずれか一方または両方にシリコーンオイ
ルを塗布したのち、これらをはめ合わせればよい。な
お、固定偏心部材（15）の外周面または可動偏心部材
（22）の偏心穴（23）の内面にらせん状の小さいみぞま
たは軸心と平行な小さいみぞを設け、このみぞにシリコ
ーンオイルを入れたのち可動偏心部材（22）を固定偏心
部材（15）にはめて回転させることによりシリコーンオ
イルを容易に全体に行きわたらせるようにすることもで
きる。また、固定偏心部材（15）の外周面または可動偏
心部材（22）の偏心穴（23）の内面に環状みぞを設けて
シリコーンオイルを溜めておくようにすることもでき
る。In order to interpose silicone oil (O) in the gap between the fixed eccentric member (15) and the movable eccentric member (22), the outer peripheral surface of the fixed eccentric member (15) and the eccentric hole (2) of the movable eccentric member (22) can be used.
After applying silicone oil to either or both of the inner surfaces of 3), these may be fitted together. In addition, a small spiral groove or a small groove parallel to the shaft center is provided on the outer peripheral surface of the fixed eccentric member (15) or the inner surface of the eccentric hole (23) of the movable eccentric member (22). After that, the movable eccentric member (22) may be fitted into the fixed eccentric member (15) and rotated, so that the silicone oil can be easily spread all over. Further, an annular groove may be provided on the outer peripheral surface of the fixed eccentric member (15) or the inner surface of the eccentric hole (23) of the movable eccentric member (22) to store the silicone oil.
上記のオートテンショナの場合、シリコーンオイルの
粘性抵抗により制振効果が発揮されるので、性能が長期
にわたって安定しており、オイルの補給の必要がない。
そして、固定偏心部材（15）と可動偏心部材（22）の回
転支持部分にダンパが組込まれた構造であり、しかもベ
ルト（32）に接する外側部材（25）やこれを付勢するば
ね（31）など全ての部品が一体に組込まれているから、
オートテンショナ全体が小形になり、構造も簡単であ
る。したがって、安価に製作でき、取付けスペースも小
さくてすむ。また、全ての部品が一体にセットされて１
つのユニットとなっているので、小形、取扱いも非常に
簡便になる。しかしながら、オートテンショナは、必ず
しもユニット化される必要はない。また、オートテンシ
ョナの他の部分の構成も、上記実施例のものに限らず、
適宜変更可能である。In the case of the above auto tensioner, since the viscous resistance of the silicone oil exerts a vibration damping effect, the performance is stable for a long time, and it is not necessary to replenish the oil.
A damper is incorporated in the rotation supporting portions of the fixed eccentric member (15) and the movable eccentric member (22), and the outer member (25) in contact with the belt (32) and the spring (31) for urging the outer member (25). ) And so on, all the parts are integrated together,
The entire auto tensioner is compact and the structure is simple. Therefore, it can be manufactured at low cost and requires a small installation space. In addition, all parts are set as one
Since it is a single unit, it is very compact and easy to handle. However, the auto tensioner does not necessarily have to be unitized. Further, the configuration of the other parts of the auto tensioner is not limited to that of the above embodiment,
It can be changed as appropriate.
なお、この発明によるオートテンショナは、自動車の
エンジンのタイミングベルト以外のベルトにももちろん
適用できる。The autotensioner according to the present invention can of course be applied to belts other than the timing belt of an automobile engine.
発明の効果 この発明のベルト用オートテンショナによれば、高粘
度の油の粘性抵抗により振動が抑制されるので、性能が
長期間にわたって安定しており、固定部材の外周面とこ
れに対向する可動偏心部材の嵌合面間の隙間に高粘度の
油が介在させられているだけであるから、構造が簡単
で、安価で小形化でき、しかも高粘度の油を介在させる
隙間の寸法管理が容易である。したがって、取扱いが簡
単で、取付けスペースが小さくてすむ。EFFECTS OF THE INVENTION According to the belt autotensioner of the present invention, vibration is suppressed by viscous resistance of high-viscosity oil, so that performance is stable for a long period of time, and the outer peripheral surface of the fixed member and the movable surface facing the outer peripheral surface are fixed. Since the high viscosity oil is only present in the gap between the mating surfaces of the eccentric member, the structure is simple, the cost can be reduced, and the size can be easily controlled. Is. Therefore, it is easy to handle and requires a small installation space.
第１図はこの発明の実施例を示すオートテンショナの縦
断面図、第２図は第１図II−II線に沿う断面図、第３図
は第１図III−III線に沿いかつばねの一部を省略して示
した矢視図である。 （11）……固定部分、（15）……固定偏心部材（固定部
材）、（22）……可動偏心部材、（23）……偏心穴、
（24）……Ｏリング、（25）……外側部材、（31）……
ばね、（32）……ベルト。FIG. 1 is a vertical sectional view of an automatic tensioner showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. It is the arrow view which abbreviate | omitted and showed one part. (11) …… Fixed part, (15) …… Fixed eccentric member (fixed member), (22) …… Movable eccentric member, (23) …… Eccentric hole,
(24) …… O-ring, (25) …… Outer member, (31) ……
Spring, (32) …… belt.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒尾 博 大阪府大阪市南区鰻谷西之町２番地 光洋 精工株式会社内 (56)参考文献 実開 昭62−188652（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Arao 2 Nishinomachi Nishinomachi, Minami-ku, Osaka City, Osaka Prefecture Koyo Seiko Co., Ltd. (56) Bibliography 62-188652 (JP, U)
Claims (1)
と、同固定部材の外周面に偏心状かつ回転自在に嵌合さ
れた円柱状の可動偏心部材と、同可動偏心部材の外側に
回転自在に取付けられてベルトに接触する円筒状の外側
部材と、同外側部材がベルトに圧接する方向に上記可動
偏心部材を付勢するばねとを備えており、上記固定部材
の外周面と同外周面に対向する上記可動偏心部材の嵌合
面との間に上記可動偏心部材を回転自在に支持するため
の隙間が設けられ、この可動偏心部材を回転自在に支持
するための隙間の両端部相互間にシールが設けられ、こ
れらのシールの間の上記隙間に高粘度の油が介在させら
れているベルト用オートテンショナ。1. A cylindrical fixing member fixed to a fixed portion, a cylindrical movable eccentric member eccentrically and rotatably fitted to an outer peripheral surface of the fixing member, and an outer side of the movable eccentric member. A cylindrical outer member that is rotatably mounted and is in contact with the belt, and a spring that biases the movable eccentric member in a direction in which the outer member is in pressure contact with the belt are provided and are the same as the outer peripheral surface of the fixed member. A gap for rotatably supporting the movable eccentric member is provided between the fitting surface of the movable eccentric member facing the outer peripheral surface, and both ends of the gap for rotatably supporting the movable eccentric member. An auto tensioner for a belt in which a seal is provided between the seals, and high-viscosity oil is interposed in the gap between the seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61189250A JPH081238B2 (en) | 1986-08-11 | 1986-08-11 | Auto tensioner for belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61189250A JPH081238B2 (en) | 1986-08-11 | 1986-08-11 | Auto tensioner for belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6347551A JPS6347551A (en) | 1988-02-29 |
| JPH081238B2 true JPH081238B2 (en) | 1996-01-10 |
Family
ID=16238146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61189250A Expired - Lifetime JPH081238B2 (en) | 1986-08-11 | 1986-08-11 | Auto tensioner for belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH081238B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4202167C2 (en) * | 1991-01-31 | 1996-11-28 | Ntn Toyo Bearing Co Ltd | Belt tensioning device |
| JPH0512815U (en) * | 1991-07-31 | 1993-02-19 | エヌテイエヌ株式会社 | Belt tension adjustment device |
| DE102005018849A1 (en) * | 2005-04-22 | 2006-10-26 | Schaeffler Kg | Clamping device for a chain or belt drive of an internal combustion engine is supported directly over a front surface of an adjusting cam on a fixed machine part and fixed in position by a fixing unit |
| RU2619347C1 (en) * | 2016-03-18 | 2017-05-15 | Денис Сергеевич Новиков | Way of drive belt tension of car engine gas distribution mechanism (variants) |
| JP7336391B2 (en) * | 2019-01-31 | 2023-08-31 | 三ツ星ベルト株式会社 | auto tensioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62188652U (en) * | 1986-05-21 | 1987-12-01 |
-
1986
- 1986-08-11 JP JP61189250A patent/JPH081238B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6347551A (en) | 1988-02-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |