JP3397943B2 - Belt tension adjustment device - Google Patents
Belt tension adjustment deviceInfo
- Publication number
- JP3397943B2 JP3397943B2 JP19945695A JP19945695A JP3397943B2 JP 3397943 B2 JP3397943 B2 JP 3397943B2 JP 19945695 A JP19945695 A JP 19945695A JP 19945695 A JP19945695 A JP 19945695A JP 3397943 B2 JP3397943 B2 JP 3397943B2
- Authority
- JP
- Japan
- Prior art keywords
- arm
- pulley
- belt
- rod
- cylinder
- 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
- 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
Landscapes
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】この発明は、エンジンのタイ
ミングベルトやオルタネータ等の補機を駆動するベルト
の張力を一定に保持するベルトの張力調整装置に関する
ものである。
【０００２】
【従来の技術】この種のベルトの張力調整装置として、
図４および図５に示したものが従来から知られている。
このベルト張力調整装置は、エンジンブロック等の固定
部材１に突設した支点軸２を中心としてアーム３を揺動
自在に支持し、そのアーム３の揺動中心に対する偏心位
置にプーリ支持軸４を設け、そのプーリ支持軸４にプー
リ５を回転自在に取付け、上記アーム３にオートテンシ
ョナＡの押圧力を付与してプーリ５をベルト１７に押し
付けている。
【０００３】ここで、オートテンショナＡはアーム３の
揺動中心線に直交する平面上にシリンダ６を設け、その
シリンダ６内にロッド７を挿入し、そのロッド７に外方
向への突出性を付与するスプリング８と、ロッド７に作
用する押し込み方向の荷重を緩衝する油圧ダンパ機構９
とをシリンダ６の内部に組込み、上記ロッド７を固定部
材１に設けたストッパ１０に当接してアーム３をベルト
１７の張り側に偏向させるようにしている。
【０００４】上記ベルト張力調整装置においては、ベル
ト１７の張力が増大したとき、アーム３を図４の矢印の
方向に揺動させ、ロッド７に作用する押し込み力を油圧
ダンパ機構９の作用に緩衝してロッド７を徐々に後退動
させてベルト１７の張力を一定に保持するようにしてい
る。
【０００５】また、ベルト１７が弛むと、スプリング８
の弾力により、アーム３を矢印で示す逆方向に素速く揺
動させてベルト１７の弛みを吸収するようにしている。
【０００６】
【発明が解決しようとする課題】ところで、従来のベル
ト張力調整装置においては、プーリ５と固定部材１との
間にアーム３が介在するため、固定部材１とプーリ５の
ベルト案内面の中心までの距離Ｌ2 が長く、ベルト１７
が固定部材１に近接している場合の使用は困難になり、
使用できない場合が生じる。
【０００７】この発明の課題は、固定部材に近接するベ
ルトの張力調整に用いることができる張力調整装置を提
供することである。
【０００８】
【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、固定部材に揺動自在に支持
されたアームにプーリ支持軸を設け、そのプーリ支持軸
に回転自在に支持されたプーリをアームと固定部材間に
配置し、上記アームにオートテンショナの押圧力を付与
してプーリをベルトに押し付け、上記オートテンショナ
が、アームに一体に設けられたシリンダと、そのシリン
ダ内に挿入されたロッドと、そのロッドに外方向への突
出性を付与するスプリングと、ロッドに作用される押し
込み力を緩衝する油圧ダンパ機構とから成り、そのオー
トテンショナのロッドの先端を固定部材に設けたストッ
パに当接させた構成を採用して、固定部材とプーリにお
けるベルト案内面の中心までの距離の短縮化を図るよう
にしている。
【０００９】
【発明の実施の形態】以下、この発明の実施の形態を図
面に基づいて説明する。
【００１０】図１乃至図３に示すように、固定部材とし
てのエンジンブロック１には支点軸２がねじ込まれ、そ
の支点軸２を中心としてアーム３が揺動自在に支持され
ている。
【００１１】アーム３にはエンジンブロック１と対向す
る面にプーリ支持軸４が設けられ、そのプーリ支持軸４
にプーリ５が回転自在に支持されている。また、アーム
３には、そのアーム３をベルト張り側に揺動させるオー
トテンショナＡが設けられている。オートテンショナＡ
は、上記支点軸２と直交するアーム３の平面上にシリン
ダ６を一体に設け、そのシリンダ６内にロッド７を挿入
し、そのロッド７に外方向への突出性を付与するスプリ
ング８と、ロッド７に作用する押し込み力を緩衝する油
圧ダンパ機構９とをシリンダ６の内部に組込み、上記ロ
ッド７の先端をエンジンブロック１に設けたストッパ１
０に当接させている。
【００１２】ここで、油圧ダンパ機構９は、ロッド７の
下端部に設けたプランジャ１１をシリンダ６の内部に設
けたスリーブ１２内にスライド自在に組込み、そのプラ
ンジャ１１とロッド７の下端部にプランジャ下方の圧力
室１３とプランジャ上方のリザーバ室１４とを連通させ
る通路１５を設け、その通路１５にチェックバルブ１６
を設けている。
【００１３】チェックバルブ１６は圧力室１３内の作動
油の圧力がリザーバ室１４内の作動油の圧力より高くな
ると、通路１５を閉じ、圧力室１３の作動油が通路１５
からリザーバ室１４内に流れるのを防止する。
【００１４】上記油圧ダンパ機構９は、プーリ５に案内
されるベルト１７の張力が増大し、アーム３が支点軸２
を中心に図１の矢印方向に揺動したとき、圧力室１３の
作動油の圧力を上昇させ、その作動油をプランジャ１１
とスリーブ１２の摺動面間のすきまからリザーバ室１４
にリークさせてアーム３をゆっくりと矢印方向に揺動さ
せるように作用する。
【００１５】一方、スプリング８は、ベルト１７が弛み
を生じたとき、アーム３を急速にベルト張り側に揺動さ
せるように作用する。
【００１６】図１乃至図３に示すベルトの張力調整装置
においては、エンジンブロック１とアーム３との間にプ
ーリ５を設けた構成であるため、エンジンブロック１と
プーリ５のベルト案内面の中心間の距離Ｌ1 が図４およ
び図５に示す従来のオートテンショナのものより小さ
く、エンジンブロック１に近接されたベルト１７の張力
調整に対応することができる。
【００１７】
【００１８】
【００１９】
【発明の効果】以上のように、この発明においては、ア
ームの固定部材と対向する内面側にプーリ支持軸を設
け、アームと固定部材との間にプーリを配置したので、
固定部材とプーリ間にアームを配置した従来のオートテ
ンショナに比較して、アームの厚みに相当する分プーリ
を固定部材に近づけることができ、固定部材に近接され
たベルトの張力調整に充分対応することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt tension adjusting device for maintaining a constant tension of a belt for driving an auxiliary machine such as an engine timing belt and an alternator. is there. 2. Description of the Related Art As this kind of belt tension adjusting device,
The one shown in FIGS. 4 and 5 is conventionally known.
This belt tension adjusting device swingably supports an arm 3 about a fulcrum shaft 2 protruding from a fixed member 1 such as an engine block, and a pulley support shaft 4 is eccentric to the swing center of the arm 3. The pulley 5 is rotatably mounted on the pulley support shaft 4, and the pressing force of the auto tensioner A is applied to the arm 3 to press the pulley 5 against the belt 17. Here, the auto tensioner A is provided with a cylinder 6 on a plane perpendicular to the swing center line of the arm 3, a rod 7 is inserted into the cylinder 6, and the rod 7 has an outward projecting property. A spring 8 to be applied and a hydraulic damper mechanism 9 for buffering a load acting on the rod 7 in the pushing direction
Are assembled in the cylinder 6, and the rod 7 is brought into contact with a stopper 10 provided on the fixing member 1 to deflect the arm 3 to the tension side of the belt 17. In the above belt tension adjusting device, when the tension of the belt 17 increases, the arm 3 is swung in the direction of the arrow in FIG. 4 so that the pushing force acting on the rod 7 is buffered by the action of the hydraulic damper mechanism 9. Then, the rod 7 is gradually moved backward to keep the tension of the belt 17 constant. When the belt 17 is loosened, the spring 8
The arm 3 is quickly swung in the opposite direction shown by the arrow to absorb the slack of the belt 17. In the conventional belt tension adjusting device, since the arm 3 is interposed between the pulley 5 and the fixed member 1, the belt guide surface of the fixed member 1 and the pulley 5 is provided. long distance L 2 to the center of the belt 17
Is difficult to use when it is close to the fixing member 1,
In some cases, it cannot be used. An object of the present invention is to provide a tension adjusting device which can be used for adjusting the tension of a belt close to a fixing member. In order to solve the above-mentioned problems, according to the present invention, a pulley support shaft is provided on an arm swingably supported by a fixed member, and the pulley support shaft is rotated by the pulley support shaft. A freely supported pulley is arranged between the arm and the fixed member, and the pressing force of the auto tensioner is applied to the arm to press the pulley against the belt, and the auto tensioner
Is a cylinder integrated with the arm and its cylinder
The rod inserted into the rod and the rod
Spring to give protruding and push applied to rod
And a hydraulic damper mechanism that buffers the
Attach the tip of the tensioner rod to the
The distance between the fixing member and the pulley to the center of the belt guide surface is reduced by adopting a configuration in which the belt is brought into contact with the pulley. Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3 , a fulcrum shaft 2 is screwed into an engine block 1 as a fixing member, and an arm 3 is swingably supported about the fulcrum shaft 2. The arm 3 is provided with a pulley support shaft 4 on a surface facing the engine block 1.
A pulley 5 is rotatably supported on the pulley. Further, the arm 3 is provided with an auto tensioner A for swinging the arm 3 toward the belt tension side. Auto tensioner A
A spring 8 for integrally providing a cylinder 6 on a plane of the arm 3 orthogonal to the fulcrum shaft 2, inserting a rod 7 into the cylinder 6, and giving the rod 7 an outward projecting property; A hydraulic damper mechanism 9 for buffering the pushing force acting on the rod 7 is incorporated in the cylinder 6, and the tip of the rod 7 is attached to the stopper 1 provided on the engine block 1.
0. The hydraulic damper mechanism 9 has a plunger 11 provided at the lower end of the rod 7 slidably incorporated in a sleeve 12 provided inside the cylinder 6, and the plunger 11 is provided at the lower end of the rod 7. A passage 15 is provided for communicating the lower pressure chamber 13 with the reservoir chamber 14 above the plunger.
Is provided. When the pressure of the hydraulic oil in the pressure chamber 13 becomes higher than the pressure of the hydraulic oil in the reservoir chamber 14, the check valve 16 closes the passage 15 and the hydraulic oil in the pressure chamber 13
From flowing into the reservoir chamber 14. In the hydraulic damper mechanism 9, the tension of the belt 17 guided by the pulley 5 increases, and the arm 3 moves to the fulcrum shaft 2.
1 in the direction of the arrow in FIG. 1, the pressure of the hydraulic oil in the pressure chamber 13 is increased, and the hydraulic oil is supplied to the plunger 11.
From the clearance between the sliding surface of the sleeve 12 and the reservoir chamber 14
To cause the arm 3 to slowly swing in the direction of the arrow. On the other hand, when the belt 17 becomes slack, the spring 8 acts so as to quickly swing the arm 3 toward the belt tension side. Since the pulley 5 is provided between the engine block 1 and the arm 3 in the belt tension adjusting device shown in FIGS. 1 to 3, the center of the belt guide surface of the engine block 1 and the pulley 5 is provided. distance L 1 between is smaller than that of the conventional auto tensioner shown in FIGS. 4 and 5 may correspond to the tensioning of the belt 17, which is close to the engine block 1. As described above, in the present invention, the pulley support shaft is provided on the inner surface of the arm facing the fixing member, and the pulley is provided between the arm and the fixing member. Since I placed it,
Compared with a conventional auto tensioner in which an arm is arranged between a fixing member and a pulley, the pulley can be brought closer to the fixing member by an amount corresponding to the thickness of the arm, and it can sufficiently cope with the tension adjustment of the belt close to the fixing member. be able to.
【図面の簡単な説明】
【図１】この発明の第１の実施の形態を示す一部切欠正
面図
【図２】図１のII−II線に沿った断面図
【図３】図１の平面図
【図４】従来のオートテンショナを示す一部切欠正面図
【図５】図４のVII −VII 線に沿った断面図
【符号の説明】
１ エンジンブロック
３ アーム
４ プーリ支持軸
５ プーリ
Ａ オートテンショナ
６ シリンダ
７ ロッド
８ スプリング
９ 油圧ダンパ機構
１０ ストッパBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention; FIG. 2 is a sectional view taken along the line II-II of FIG. 1 FIG. FIG. 4 is a partially cutaway front view showing a conventional auto tensioner. FIG . 5 is a cross-sectional view taken along the line VII-VII in FIG . 4 [Explanation of reference numerals] 1 Engine block 3 Arm 4 Pulley support shaft 5 Pulley A Auto tensioner 6 Cylinder 7 Rod 8 Spring 9 Hydraulic damper mechanism 10 Stopper
Claims (1)
にプーリ支持軸を設け、そのプーリ支持軸に回転自在に
支持されたプーリをアームと固定部材間に配置し、上記
アームにオートテンショナの押圧力を付与してプーリを
ベルトに押し付け、上記オートテンショナが、アームに
一体に設けられたシリンダと、そのシリンダ内に挿入さ
れたロッドと、そのロッドに外方向への突出性を付与す
るスプリングと、ロッドに作用される押し込み力を緩衝
する油圧ダンパ機構とから成り、そのオートテンショナ
のロッドの先端を固定部材に設けたストッパに当接させ
たベルトの張力調整装置。(1) A pulley support shaft is provided on an arm swingably supported by a fixed member, and a pulley rotatably supported by the pulley support shaft is provided between the arm and the fixed member. And apply the pressing force of the auto tensioner to the arm to press the pulley against the belt, and the auto tensioner
Cylinder provided integrally and inserted into the cylinder
Rod and give the rod outward protrusion
Spring and buffering force applied to the rod
The automatic tensioner
Abut the stopper on the fixed member
A belt tension adjusting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19945695A JP3397943B2 (en) | 1995-08-04 | 1995-08-04 | Belt tension adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19945695A JP3397943B2 (en) | 1995-08-04 | 1995-08-04 | Belt tension adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0941985A JPH0941985A (en) | 1997-02-10 |
| JP3397943B2 true JP3397943B2 (en) | 2003-04-21 |
Family
ID=16408120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19945695A Expired - Lifetime JP3397943B2 (en) | 1995-08-04 | 1995-08-04 | Belt tension adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3397943B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2707625B1 (en) | 2011-05-13 | 2019-09-25 | Litens Automotive Partnership | Intelligent belt drive system and method |
| WO2013033822A1 (en) | 2011-09-05 | 2013-03-14 | Litens Automotive Partnership | Intelligent belt drive system and method |
| WO2013159181A1 (en) | 2012-04-28 | 2013-10-31 | Litens Automotive Partnership | Adjustable tensioner |
-
1995
- 1995-08-04 JP JP19945695A patent/JP3397943B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0941985A (en) | 1997-02-10 |
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