JPH1030696A - Chain tensioner - Google Patents
Chain tensionerInfo
- Publication number
- JPH1030696A JPH1030696A JP18921696A JP18921696A JPH1030696A JP H1030696 A JPH1030696 A JP H1030696A JP 18921696 A JP18921696 A JP 18921696A JP 18921696 A JP18921696 A JP 18921696A JP H1030696 A JPH1030696 A JP H1030696A
- Authority
- JP
- Japan
- Prior art keywords
- screw shaft
- chain
- pressure
- housing
- chain 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.)
- Granted
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
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
-
- 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
- F16H2007/0812—Fluid pressure
-
- 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
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
-
- 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
- F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、カム軸駆動用チ
ェーン等のチェーンの張力を一定に保持するチェーンテ
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 chain tensioner for maintaining a constant tension of a chain such as a camshaft driving chain.
【0002】[0002]
【従来の技術】カム軸駆動用チェーンの張力を一定に保
つチェーンテンショナとして、図4に示したものが知ら
れている。このチェーンテンショナはハウジング30に
形成されたシリンダ室31内にプランジャ32と、スプ
リング33とを組込み、上記スプリング33で突出性が
付与されたプランジャ32によりチェーンAを押圧する
ようにしている。2. Description of the Related Art FIG. 4 shows a known chain tensioner for keeping the tension of a camshaft driving chain constant. In this chain tensioner, a plunger 32 and a spring 33 are incorporated in a cylinder chamber 31 formed in a housing 30, and the chain A is pressed by the plunger 32 provided with the projecting property by the spring 33.
【0003】また、プランジャ32の背部に形成された
圧力室34に給油通路35を連通し、その給油通路35
にチェックバルブ36を設け、上記プランジャ32が外
方向に移動して圧力室34の圧力が低下したとき、チェ
ックバルブ36を開放させ、給油ポンプの駆動により給
油通路35から圧力室34に油を流動させるようにして
いる。[0003] An oil supply passage 35 communicates with a pressure chamber 34 formed at the back of the plunger 32.
When the plunger 32 moves outward and the pressure in the pressure chamber 34 decreases, the check valve 36 is opened, and the oil supply pump drives the oil to flow oil from the oil supply passage 35 to the pressure chamber 34. I try to make it.
【0004】上記チェーンテンショナにおいては、エン
ジンの停止により、チェーンAが緊張してプランジャ3
2に押し込み力が作用すると、その押し込み力は圧力室
34に封入された油によって緩衝される。また、チェー
ンAに弛みが生じると、スプリング33の弾力によりプ
ランジャ32が急速に外方向に移動してチェーンAを緊
張させる。このため、チェーンAの張力変動に対するプ
ランジャ32の追従性が良好であり、チェーンAの張力
を常に一定に保持することができるという特徴を有す
る。In the above-described chain tensioner, when the engine is stopped, the chain A becomes tense and the plunger 3
When a pushing force acts on 2, the pushing force is buffered by the oil sealed in the pressure chamber 34. Further, when the chain A is loosened, the plunger 32 is rapidly moved outward by the elasticity of the spring 33 to tension the chain A. Therefore, the plunger 32 has good followability with respect to the tension fluctuation of the chain A, and the tension of the chain A can always be kept constant.
【0005】[0005]
【発明が解決しようとする課題】ところで、上記チェー
ンテンショナにおいては、チェーンAの移動を案内する
スリッパ37の併用においてチェーンAの張力を調整す
る必要があり、従来は、そのスリッパ37がチェーンテ
ンショナに対して非連結の構造であるため、組付けに際
しては、チェーンテンショナとスリッパ37とを、相対
的な位置関係を保って別々に組付ける必要がある。この
ため、組付けに非常に手間がかかる問題がある。In the above-mentioned chain tensioner, it is necessary to adjust the tension of the chain A when using the slipper 37 for guiding the movement of the chain A. Conventionally, the slipper 37 is attached to the chain tensioner. On the other hand, the chain tensioner and the slipper 37 need to be separately assembled while maintaining a relative positional relationship. For this reason, there is a problem that the assembling is very troublesome.
【0006】この発明の課題は、組付けの容易なチェー
ンテンショナを提供することである。An object of the present invention is to provide a chain tensioner that can be easily assembled.
【0007】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明においては、ハウジングに形成されたシ
リンダ室内に、そのシリンダ室の内径面に沿って摺動自
在の進退部材と、その進退部材を外方向に押圧するスプ
リングとを組込み、前記進退部材の外方向への移動時
に、その進退部材で押圧されるチェーン押圧用のスリッ
パをハウジングに揺動自在に取付けた構成を採用してい
る。In order to solve the above-mentioned problems, according to the present invention, an advancing / retracting member slidable along an inner diameter surface of a cylinder chamber in a cylinder chamber formed in a housing; A spring that pushes the reciprocating member outward is incorporated, and when the reciprocating member is moved outward, a chain pressing slipper pressed by the reciprocating member is swingably attached to the housing. I have.
【0008】ここで、スリッパの揺動支点軸はハウジン
グを取付ける固定軸としてもよい。また、進退部材は、
シリンダ室の開口部に設けたねじ孔にねじ係合されるね
じ軸と、そのねじ軸の背部に設けられたプランジャとか
ら成るものであってもよい。この場合、ねじ孔とねじ軸
の外周のねじ山を、ねじ軸の押し込み力を受ける圧力側
フランクのフランク角が遊び側フランクのフランク角よ
り小さい鋸歯状とし、その鋸歯状ねじ山に前記スプリン
グの押圧力によってねじ軸が外方向に移動するリード角
を設けるようにする。Here, the swing fulcrum shaft of the slipper may be a fixed shaft for mounting the housing. In addition, the reciprocating member,
It may be composed of a screw shaft screwed into a screw hole provided in the opening of the cylinder chamber, and a plunger provided on the back of the screw shaft. In this case, the screw hole and the thread on the outer periphery of the screw shaft are formed into a sawtooth shape in which the flank angle of the pressure side flank receiving the pushing force of the screw shaft is smaller than the flank angle of the play side flank. The lead angle at which the screw shaft moves outward by the pressing force is provided.
【0009】[0009]
【発明の実施の形態】以下、この発明の実施の形態を図
1乃至図3に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【0010】図1に示すように、ハウジング1は複数の
取付片2を外周に有し、各取付片2は、図2に示すよう
に、エンジンのシリンダブロック3にねじ込まれるボル
ト4の締付けによって固定される。As shown in FIG. 1, the housing 1 has a plurality of mounting pieces 2 on its outer periphery. Each mounting piece 2 is tightened by a bolt 4 screwed into a cylinder block 3 of the engine as shown in FIG. Fixed.
【0011】また、ハウジング1には先端面で開口する
シリンダ室5が形成され、そのシリンダ室5内に、その
シリンダ室5の内径面に沿って摺動自在の進退部材6
と、スプリング7とが組込まれ、上記スプリング7によ
って進退部材6は外方向に突出性が付与されている。A cylinder chamber 5 is formed in the housing 1 and has an opening at the tip end. The cylinder chamber 5 has an advancing and retreating member 6 slidable along the inner diameter of the cylinder chamber 5.
, And a spring 7, and the reciprocating member 6 is provided with an outwardly projecting property by the spring 7.
【0012】シリンダ室5の閉塞端壁には、進退部材6
の背部に形成された圧力室8と連通する給油通路9が形
成されている。給油通路9の油出口に設けられたチェッ
クバルブ10は、圧力室8内の圧力が給油通路9内の圧
力より高くなると、給油通路9を閉じ、給油通路9から
圧力室8への油の流入を阻止する。An advancing / retreating member 6 is provided on the closed end wall of the cylinder chamber 5.
An oil supply passage 9 communicating with a pressure chamber 8 formed at the back of the fuel tank is formed. The check valve 10 provided at the oil outlet of the oil supply passage 9 closes the oil supply passage 9 when the pressure in the pressure chamber 8 becomes higher than the pressure in the oil supply passage 9, and flows the oil from the oil supply passage 9 into the pressure chamber 8. To block.
【0013】前記進退部材6は、ねじ軸11と、そのね
じ軸11の背部に組込まれたプランジャ12とから成
り、プランジャ12にはねじ軸11の後端面と点接触す
る球形先端面13が設けられている。The reciprocating member 6 comprises a screw shaft 11 and a plunger 12 mounted on the back of the screw shaft 11. The plunger 12 is provided with a spherical tip surface 13 which makes point contact with the rear end surface of the screw shaft 11. Have been.
【0014】ねじ軸11は、シリンダ室5の開口部に圧
入されたナット部材14のねじ孔15とねじ係合してい
る。図3に示すように、ねじ軸11とねじ孔15のねじ
山は、ねじ軸11の押し込み力を受ける圧力側フランク
16のフランク角が遊び側フランク17のフランク角よ
り大きい鋸歯状とされ、その鋸歯状ねじ山のフランクと
リード角の関係から、ねじ軸11は外方向に弛み条件と
され、押し込み方向にロック条件とされている。The screw shaft 11 is screw-engaged with a screw hole 15 of a nut member 14 press-fitted into the opening of the cylinder chamber 5. As shown in FIG. 3, the thread of the screw shaft 11 and the screw hole 15 has a sawtooth shape in which the flank angle of the pressure side flank 16 receiving the pushing force of the screw shaft 11 is larger than the flank angle of the play side flank 17. From the relationship between the flank and the lead angle of the serrated screw thread, the screw shaft 11 is set to the slack condition in the outward direction and the lock condition in the pushing direction.
【0015】ここで、弛み条件とは、スプリング7の押
圧力によってねじ軸11が回転しつつ外方向にスムーズ
に移動することをいう。一方、ロック条件とは、ねじ軸
11が押し込まれても軸方向に移動せず、また、チェー
ンの振動がねじ軸11に作用したとき、ねじ係合部のね
じ山間に形成された軸方向すきま分だけ間歇的に当接、
離反を繰り返し、接触するねじ山の2つのフランク面間
の相対ねじ運動を瞬間的にロックすることなく、ねじ軸
11は少しずつ間歇的に回転を続けて、押し込み力とス
プリング7の付勢力とが均衡する位置までねじ軸11が
シリンダ室5内にゆっくりと移動することをいう。Here, the slack condition means that the screw shaft 11 is smoothly moved outward while rotating by the pressing force of the spring 7. On the other hand, the locking condition means that when the screw shaft 11 is pushed in, it does not move in the axial direction, and when vibration of the chain acts on the screw shaft 11, an axial clearance formed between the threads of the screw engaging portion is formed. Abuts intermittently for minutes,
The screw shaft 11 continues to rotate little by little intermittently without instantaneously locking the relative screw motion between the two flank surfaces of the contacting thread, repeating the separation, and the pushing force and the urging force of the spring 7 Means that the screw shaft 11 moves slowly into the cylinder chamber 5 to a position where the pressures are balanced.
【0016】上記ねじ軸11の前側にはチェーン押圧用
の弧状のスリッパ18が設けられている。スリッパ18
は合成樹脂等の滑り性の良好な材料から形成され、その
一端部は取付片2の固定用ボルト4を中心に揺動自在に
支持され、長さ方向中途に設けた球形突部19がねじ軸
11の先端面と対向している。An arc-shaped slipper 18 for pressing a chain is provided on the front side of the screw shaft 11. Slippers 18
Is formed of a material having good slipperiness such as a synthetic resin, and one end thereof is swingably supported around the fixing bolt 4 of the mounting piece 2, and a spherical projection 19 provided in the middle in the length direction has a screw. It faces the tip end surface of the shaft 11.
【0017】上記のように、チェーン押圧用スリッパ1
8をハウジング1に対して揺動自在に連結したことによ
り、シリンダブロック3に対してハウジング1を取付け
ることによって、スリッパ18も同時に取付けられ、チ
ェーンテンショナの組付け性の向上を図ることができ
る。As described above, the chain pressing slipper 1
Since the housing 8 is swingably connected to the housing 1, by mounting the housing 1 to the cylinder block 3, the slipper 18 is also mounted at the same time, and the assembling property of the chain tensioner can be improved.
【0018】図1に示すようなチェーンテンショナの組
付け状態において、エンジンの回転数の変動によってチ
ェーンAに弛みが生じると、スプリング7の押圧力によ
り、ねじ軸11は回転しつつ外方向に移動する。このと
き、ねじ軸11とナット部材14に形成されたねじ孔1
5のねじ山の遊び側フランク17のフランク角とリード
角の関係からねじ軸11は突出方向に弛み条件とされて
いるため、ねじ軸11はスムーズに回転して外方向に素
速く移動し、その移動によってチェーンAの弛みは吸収
される。In the assembled state of the chain tensioner as shown in FIG. 1, if the chain A becomes slack due to a change in the number of revolutions of the engine, the pressing force of the spring 7 causes the screw shaft 11 to move outward while rotating. I do. At this time, screw holes 1 formed in screw shaft 11 and nut member 14 are formed.
Since the screw shaft 11 is slackened in the protruding direction from the relationship between the flank angle of the play-side flank 17 and the lead angle of the screw thread No. 5, the screw shaft 11 rotates smoothly and moves quickly outward. The slack of the chain A is absorbed by the movement.
【0019】ねじ軸11の外方向への移動時、プランジ
ャ12はねじ軸11と共に外方向に移動し、その移動に
よって圧力室8内の圧力が給油通路9内の圧力より低下
するため、チェックバルブ10が給油通路9を開放し、
その給油通路9から圧力室8に油が供給される。When the screw shaft 11 moves outward, the plunger 12 moves outward together with the screw shaft 11, and the movement causes the pressure in the pressure chamber 8 to be lower than the pressure in the oil supply passage 9. 10 opens the refueling passage 9,
Oil is supplied to the pressure chamber 8 from the oil supply passage 9.
【0020】また、チェーンAからの振動がねじ軸11
に作用し、ねじ軸11に付与される押し込み力がスプリ
ング7の押圧力より大きい場合、ねじ軸11は押し込み
力とスプリング7の押圧力とが釣り合う位置までゆっく
りと後退動する。The vibration from the chain A is applied to the screw shaft 11
When the pushing force applied to the screw shaft 11 is greater than the pressing force of the spring 7, the screw shaft 11 slowly moves backward to a position where the pushing force and the pressing force of the spring 7 are balanced.
【0021】このとき、圧力室8の圧力が給油通路9内
の圧力より高くなるため、チェックバルブ10は給油通
路9を閉じ、圧力室8内の油はプランジャ12とシリン
ダ室5の摺動面間およびねじ軸11とねじ孔15のねじ
係合面間の隙間から外部にリークする。At this time, since the pressure in the pressure chamber 8 becomes higher than the pressure in the oil supply passage 9, the check valve 10 closes the oil supply passage 9, and the oil in the pressure chamber 8 slides between the plunger 12 and the cylinder chamber 5. Leakage to the outside through the gap between the screw shaft 11 and the screw engagement surface of the screw hole 15.
【0022】エンジンが停止し、カム軸に設けられたカ
ムの停止位置の関係からチェーンAが緊張してねじ軸1
1が押し込まれると、その押し込み力は、ねじ軸11と
ねじ孔15のねじ山における圧力側フランク16で受け
られる。その圧力側フランク16のフランク角とリード
角の関係からねじ軸11は押し込み方向にロック条件と
されているため、ねじ軸11は、ロックして後退しな
い。When the engine is stopped and the chain A is tightened due to the stop position of the cam provided on the camshaft, the screw shaft 1
When 1 is pushed in, the pushing force is received by the screw shaft 11 and the pressure side flank 16 in the thread of the screw hole 15. Since the screw shaft 11 is locked in the pushing direction from the relationship between the flank angle and the lead angle of the pressure side flank 16, the screw shaft 11 is locked and does not retreat.
【0023】上記のように、エンジンの停止によってチ
ェーンAが緊張してもねじ軸11は後退しないため、エ
ンジンの停止後、エンジンが再始動されてチェーンAに
弛みが生じても、ねじ軸11の突出量は少なく、圧力室
8の圧力の低下も少ないため、圧力室8に空気が侵入
し、あるいは油中から空気が析出するという不都合の発
生はきわめて少ない。As described above, the screw shaft 11 does not retreat even if the chain A is tensioned due to the stop of the engine. Therefore, even if the engine is restarted and the chain A becomes slack after the engine is stopped, the screw shaft 11 Since the protrusion amount of the pressure chamber 8 is small and the pressure of the pressure chamber 8 does not decrease much, the inconvenience that air enters the pressure chamber 8 or air is precipitated from the oil is extremely small.
【0024】なお、低温始動時、油の粘性が高く、圧力
室8への油の流入が悪いが、この場合でもねじ軸11の
突出量が小さいため、圧力室8に空気が侵入し、あるい
は油中から空気が析出するのを防止することができる。At a low temperature start, the viscosity of the oil is high and the flow of the oil into the pressure chamber 8 is poor. However, even in this case, since the amount of protrusion of the screw shaft 11 is small, air enters the pressure chamber 8 or Precipitation of air from oil can be prevented.
【0025】発明の実施の形態においては、進退部材6
として、ねじ軸11とプランジャ12とから成るものを
示したが、上記進退部材6はプランジャ単体から成るも
のであってもよい。In the embodiment of the invention, the reciprocating member 6
Although the above-described configuration includes the screw shaft 11 and the plunger 12, the reciprocating member 6 may be configured as a single plunger.
【0026】[0026]
【発明の効果】以上のように、この発明においては、進
退部材によって押圧されるチェーン押圧用のスリッパを
ハウジングに揺動自在に連結したので、ハウジングとス
リッパとを個々に取付ける必要がなくなり、チェーンテ
ンショナの組付け性の向上を図ることができる。As described above, according to the present invention, since the chain pressing slipper pressed by the advancing / retracting member is swingably connected to the housing, it is not necessary to individually mount the housing and the slipper, and the chain is not required. The assemblability of the tensioner can be improved.
【0027】また、進退部材をねじ軸とプランジャとで
形成し、シリンダ室の開口部には上記ねじ軸とねじ係合
するねじ孔を設け、そのねじ軸とねじ孔のねじ山をねじ
軸の押し込み力を受ける圧力側フランクのフランク角が
遊び側フランクのフランク角より大きい鋸歯状としてね
じ軸を突出方向に弛み条件とし、押し込み方向にロック
条件としたことにより、エンジンの再始動時にチェーン
に弛みが生じても摺動部材が外方向に大きく移動せず、
圧力室への空気の侵入および油中から空気が析出するの
を防止することができる。Further, the reciprocating member is formed by a screw shaft and a plunger, and a screw hole is formed in the opening of the cylinder chamber so as to be screwed with the screw shaft. The flank angle of the pressure-side flank receiving the pushing force is larger than the flank angle of the play-side flank, and the chain is slackened when the engine is restarted. Even if the sliding occurs, the sliding member does not largely move outward,
It is possible to prevent entry of air into the pressure chamber and precipitation of air from oil.
【0028】さらに、チェーンの張力変動時、ねじ軸が
ねじ運動し、かつプランジャが摺動するだけであるた
め、異音の発生が少なく、しかも、ねじ軸とねじ孔のね
じ係合部で圧力を受けるため、耐久性に優れたチェーン
テンショナを提供することができる。Further, when the tension of the chain fluctuates, since the screw shaft only makes a screw motion and the plunger slides, the generation of abnormal noise is small, and the pressure at the screw engaging portion between the screw shaft and the screw hole is reduced. Therefore, a chain tensioner having excellent durability can be provided.
【図1】この発明に係るチェーンテンショナの断面図FIG. 1 is a cross-sectional view of a chain tensioner according to the present invention.
【図2】図1のII−II線に沿った断面図FIG. 2 is a sectional view taken along the line II-II in FIG.
【図3】同上のねじ軸とねじ孔のねじ係合部における拡
大断面図FIG. 3 is an enlarged cross-sectional view of a screw shaft and a screw hole of the screw engaging portion.
【図4】従来のチェーンテンショナを示す断面図FIG. 4 is a sectional view showing a conventional chain tensioner.
【符号の説明】 1 ハウジング 5 シリンダ室 6 進退部材 7 スプリング 8 圧力室 9 給油通路 10 チェックバルブ 11 ねじ軸 12 プランジャ 14 ナット部材 15 ねじ孔 16 圧力側フランク 17 遊び側フランク 18 スリッパ[Description of Signs] 1 Housing 5 Cylinder chamber 6 Reciprocating member 7 Spring 8 Pressure chamber 9 Oil supply passage 10 Check valve 11 Screw shaft 12 Plunger 14 Nut member 15 Screw hole 16 Pressure side flank 17 Play side flank 18 Slipper
Claims (4)
に、そのシリンダ室の内径面に沿って摺動自在の進退部
材と、その進退部材を外方向に押圧するスプリングとを
組込み、前記進退部材の外方向への移動時に、その進退
部材で押圧されるチェーン押圧用のスリッパをハウジン
グに揺動自在に取付けたチェーンテンショナ。1. A reciprocating member slidable along an inner diameter surface of a cylinder chamber and a spring for pressing the reciprocating member outward are incorporated in a cylinder chamber formed in a housing. A chain tensioner in which a slipper for pressing a chain pressed by an advancing and retreating member is swingably attached to a housing when moving in a direction.
グ取付け用の固定軸とした請求項1に記載のチェーンテ
ンショナ。2. The chain tensioner according to claim 1, wherein the pivot shaft of the slipper is a fixed shaft for mounting the housing.
部材の背部に形成された圧力室と連通する給油通路を設
け、その給油通路の油出口に、圧力室内の圧力が給油通
路内の圧力より高くなると、その給油通路を閉じるチェ
ックバルブを設けた請求項1又は2に記載のチェーンテ
ンショナ。3. An oil supply passage communicating with a pressure chamber formed at the back of the advance / retreat member is provided at a closed end wall of the cylinder chamber, and an oil outlet of the oil supply passage has a pressure in the pressure chamber within the oil supply passage. 3. The chain tensioner according to claim 1, further comprising a check valve for closing the oil supply passage when the pressure becomes higher than the pressure.
設けたねじ孔にねじ係合されたねじ軸と、そのねじ軸の
背部に設けられたプランジャとから成り、ねじ孔とねじ
軸の外周のねじ山を、ねじ軸の押し込み力を受ける圧力
側フランクのフランク角が遊び側フランクのフランク角
より大きい鋸歯状とし、その鋸歯状ねじ山に前記スプリ
ングの押圧力によってねじ軸が外方向に移動するリード
角を設けた請求項1乃至3のいずれ1つに記載のチェー
ンテンショナ。4. The reciprocating member includes a screw shaft screw-engaged with a screw hole provided in an opening of the cylinder chamber, and a plunger provided on the back of the screw shaft. The outer peripheral thread has a sawtooth shape in which the flank angle of the pressure side flank receiving the pushing force of the screw shaft is larger than the flank angle of the play side flank. The chain tensioner according to any one of claims 1 to 3, wherein a moving lead angle is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18921696A JP3590205B2 (en) | 1996-07-18 | 1996-07-18 | Chain tensioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18921696A JP3590205B2 (en) | 1996-07-18 | 1996-07-18 | Chain tensioner |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH1030696A true JPH1030696A (en) | 1998-02-03 |
JP3590205B2 JP3590205B2 (en) | 2004-11-17 |
Family
ID=16237511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18921696A Expired - Fee Related JP3590205B2 (en) | 1996-07-18 | 1996-07-18 | Chain tensioner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3590205B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103363044A (en) * | 2012-03-28 | 2013-10-23 | 株式会社椿本链条 | Hydraulic tensioner |
-
1996
- 1996-07-18 JP JP18921696A patent/JP3590205B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103363044A (en) * | 2012-03-28 | 2013-10-23 | 株式会社椿本链条 | Hydraulic tensioner |
Also Published As
Publication number | Publication date |
---|---|
JP3590205B2 (en) | 2004-11-17 |
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