JPS6032449Y2 - Tensioner for timing belt - Google Patents

Tensioner for timing belt

Info

Publication number
JPS6032449Y2
JPS6032449Y2 JP18285180U JP18285180U JPS6032449Y2 JP S6032449 Y2 JPS6032449 Y2 JP S6032449Y2 JP 18285180 U JP18285180 U JP 18285180U JP 18285180 U JP18285180 U JP 18285180U JP S6032449 Y2 JPS6032449 Y2 JP S6032449Y2
Authority
JP
Japan
Prior art keywords
hole
inner ring
belt pulley
tension
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
Application number
JP18285180U
Other languages
Japanese (ja)
Other versions
JPS57104040U (en
Inventor
真介 森口
Original Assignee
ダイハツ工業株式会社
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 ダイハツ工業株式会社 filed Critical ダイハツ工業株式会社
Priority to JP18285180U priority Critical patent/JPS6032449Y2/en
Publication of JPS57104040U publication Critical patent/JPS57104040U/ja
Application granted granted Critical
Publication of JPS6032449Y2 publication Critical patent/JPS6032449Y2/en
Expired legal-status Critical Current

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Description

【考案の詳細な説明】 本考案は、偏心して枢支される内輪にベルトプーリを回
転自在に取り付けるとともに該内輪を回動させうるバネ
受けを有する基板を設けることによって、ベルトの張力
の設定を容易、かつ正確になしうるとともに、取付はス
ペースを減じかつ剛性に優れたタイミングベルト用テン
ショナに関する。
[Detailed description of the invention] The present invention allows the tension of the belt to be set by rotatably attaching a belt pulley to an eccentrically supported inner ring and by providing a base plate having a spring receiver that can rotate the inner ring. The present invention relates to a timing belt tensioner that can be easily and accurately installed, requires less space, and has excellent rigidity.

タイミングベルトを用いてカム軸を駆動するばあい、タ
イミングベルトにタイミングベルトテンショナを用いて
所定の初期張力を与えそのたるみを除去するとともに、
ベルトに所定の張力を設定したのちは該テンショナを固
定することによってタイミングベルトの伸びの進行を防
止するように構成されている。
When driving a camshaft using a timing belt, a timing belt tensioner is used to apply a predetermined initial tension to the timing belt and remove the slack.
After setting a predetermined tension on the belt, the tensioner is fixed to prevent the timing belt from elongating.

このように、タイミングベルトに初期張力与えるベルト
テンショナとしては、従来例えば第6図に示すように、
支点ボルトaにより一端をシリンダブロックb等のエン
ジンの静止部材に枢支される基板Cにベルトプーリdを
枢着するとともに、その外方延長部に前記支点ボルトa
を曲率中心とする円弧溝eを設け、さらにその外端にバ
ネ受けfを設けることによって、該バネ受fに掛止され
るバネgのバネ力によって所定の張力を付与するととも
に、前記支点ボルトaおよび円弧meを通るボルトhに
よって該基板Cを固定し、あるいは第7図に示すように
例えば実開昭52−71604号公報が開示する、円弧
lieをベルトプーリd内部に設ける等のものが提案さ
れているが、まず前者においては、支点ボルトaおよび
円弧meがベルトプーリdの外周を超える位置に設けら
れているため、その基板Cの寸法が大となり大きな取付
はスペースを要するとともに、ベルトプーリdは基板C
から上方に突出して枢支され、従って基板Cにネジリカ
を作用することとなるため、そのネジリカに打ちかちタ
イミングベルトにねじれを与えることなく直角に案内す
るには基板Cには高い剛性が要請される。
In this way, as a belt tensioner that applies initial tension to a timing belt, for example, as shown in FIG.
A belt pulley d is pivotally connected to a base plate C whose one end is pivotally supported by a stationary member of the engine such as a cylinder block b by a fulcrum bolt a, and the fulcrum bolt a is attached to an outwardly extending portion of the belt pulley d.
By providing an arcuate groove e having the center of curvature as The board C may be fixed by a bolt h passing through a and an arc me, or an arc lie may be provided inside a belt pulley d, as shown in FIG. However, in the former case, since the fulcrum bolt a and the arc me are provided at a position exceeding the outer circumference of the belt pulley d, the dimensions of the board C become large, and a large installation requires space, and the belt Pulley d is board C
The timing belt is pivoted and protrudes upward from the timing belt, and therefore exerts a torsion on the board C. Therefore, the board C must have high rigidity in order to overcome the torsion and guide the timing belt at right angles without twisting it. Ru.

又第7図に示すものは前者に比較して基板Cの小型化が
なしうるとはいえ、かかる構成のものでは支点ボルトa
とバネ受fとの間の距AIRと、支係ボルトaとベルト
プーリdの中心Aとの間の距離rとのレバー比を大きく
はなしえず従ってベルトプーリdによって所望の張力を
付与するには、前記バネ受fに掛止されるバネgの力を
大きく設定する必要があった。
Furthermore, although the circuit board C shown in FIG.
The lever ratio between the distance AIR between the support bolt a and the center A of the belt pulley d cannot be made large, and therefore the desired tension cannot be applied by the belt pulley d. In this case, it was necessary to set the force of the spring g hooked to the spring receiver f to be large.

なお第8図に示すごとく、ベルトブーIJ d内にその
軸芯と偏心した透孔iを設は該透孔iを通る固定ボルト
jを設ける一方、特殊なトルク設定器を用いてベルトプ
ーリdを回動させることにより張力を付与するようにし
たものも提案されている。
As shown in Fig. 8, a through hole i eccentric to the axis of the belt pulley IJ d is provided, and a fixing bolt j passing through the through hole i is provided, while a special torque setting device is used to set the belt pulley d. A device in which tension is applied by rotating the device has also been proposed.

しかしこのものはコンパクトになる反面、張力の設定の
都度、特異なトルク設定用の工具を必要とし、汎用性に
欠け、整備性に劣るものであった。
However, although this device was compact, it required a unique torque setting tool each time the tension was set, and it lacked versatility and was poor in maintainability.

本考案はかかる問題点を解決しうるタイミングベルト用
テンショナの提供を目的とし、以下その一実施例を図面
により説明する。
The present invention aims to provide a timing belt tensioner that can solve these problems, and one embodiment thereof will be described below with reference to the drawings.

第1図〜第2図において本考案のテンショナ1は、固定
ボルト4挿通用の透孔11が偏心位置に設けられかつベ
ルトプーリ3を外挿する内輪2に基板6を固着するとと
もに、該基板6に張力設定用バネ13を係着するバネ受
5を設ける一方、バネ受5と透孔11との間に、該透孔
11を曲率中心としかつ締付ボルト21を挿通する円弧
溝12を形成している。
1 and 2, the tensioner 1 of the present invention has a through hole 11 for inserting a fixing bolt 4 provided at an eccentric position, and fixes a base plate 6 to an inner ring 2 through which a belt pulley 3 is inserted. 6 is provided with a spring receiver 5 to which the tension setting spring 13 is attached, and an arcuate groove 12 is provided between the spring receiver 5 and the through hole 11 with the through hole 11 as the center of curvature and into which the tightening bolt 21 is inserted. is forming.

内輪2はその外面に押え板6を有し、該押え板6に前記
透孔11が形成されている。
The inner ring 2 has a presser plate 6 on its outer surface, and the presser plate 6 has the through hole 11 formed therein.

内輪2とベルトプーリ3とは本実施例では2列の球軸受
として形成されることにより、ベルトプーリ3は内輪2
の周囲に回転自在に外挿される。
In this embodiment, the inner ring 2 and the belt pulley 3 are formed as two rows of ball bearings, so that the belt pulley 3 is connected to the inner ring 2.
is rotatably extrapolated around .

基板6は本実施例では前記内輪2に圧入しうる突条10
を円形に成形するとともに、該突条10内にかつ該突条
10の中心即ち内輪2の中心Aとは偏心させて透孔11
を穿設する。
In this embodiment, the base plate 6 has a protrusion 10 that can be press-fitted into the inner ring 2.
is formed into a circular shape, and a through hole 11 is formed inside the protrusion 10 and eccentrically from the center of the protrusion 10, that is, the center A of the inner ring 2.
to be drilled.

又前記基板6は、偏心位置の前記透孔11とは、中心A
を挟む反対側に、前記ベルトプーリ3の外周をこえて延
長され、その延長部である反対側部分に前記円弧溝12
が形成される。
In addition, the substrate 6 is arranged so that the eccentric position of the through hole 11 is at the center A.
The circular arc groove 12 extends beyond the outer periphery of the belt pulley 3, and is provided with the circular arc groove 12 on the opposite side, which is an extension of the belt pulley 3.
is formed.

又反対側部分には、バネ受5が、前記円弧溝12を半径
方向を外にこえるその外方片側位置に形成される。
On the opposite side, a spring receiver 5 is formed on one side of the arcuate groove 12 beyond the radial direction.

従って、バネ受5は、透孔11とは、中心Aを挟むその
反対側部分に、又円弧溝12は、バネ受5と透孔11と
の間かつ透孔11とは中心Aを隔てる位置に形設される
Therefore, the spring receiver 5 is located on the opposite side of the center A from the through hole 11, and the arcuate groove 12 is located between the spring receiver 5 and the through hole 11 and at a position separating the center A from the through hole 11. It is formed into.

固定ボルト4は内輪2の他側面に嵌着されかつベルトプ
ーリ3の内周面に近接する防塵用のフランジ部15を具
える押え板16を偏心して貫通し、かつ前記透孔11に
遊挿される。
The fixing bolt 4 is fitted on the other side of the inner ring 2 and passes eccentrically through a holding plate 16 provided with a dustproof flange portion 15 close to the inner peripheral surface of the belt pulley 3, and loosely inserted into the through hole 11. It will be done.

なお該押え板16には基板6の透孔11と同一位置に偏
位する固定ボルト4挿通用の貫通孔17が設けられてい
る。
Note that the holding plate 16 is provided with a through hole 17 for inserting the fixing bolt 4, which is offset at the same position as the through hole 11 of the substrate 6.

なお19はシリンダブロック7等の適当なエンジンの静
止部材に穿設されたネジ穴であり前記固定ボルト4を螺
着でき、又20は前記円弧溝12を通る締付ボルト21
を螺着するネジ穴である。
Note that 19 is a screw hole drilled in a suitable stationary member of the engine such as the cylinder block 7, into which the fixing bolt 4 can be screwed, and 20 is a tightening bolt 21 that passes through the circular arc groove 12.
This is the screw hole to screw into.

然して本考案のタイミングベルト用テンショナ1を、第
5図に例示するクランクシャフトとカムシャフトとに固
定されるギヤー25.26を巻回するタイミングベルト
27の張力付加用として用いるばあいには、前記固定ボ
ルト4を螺着するネジ穴19と、円弧溝12を通る締付
ボルト21を固定するネジ穴20とをベルト走行線の外
方に近接して穿設しかつ押え板16をその貫通孔17を
基板6の透孔11と位置合わせしつつ嵌着し、かつ貫通
孔17と透孔11とを通すワツシャ29を介して固定ボ
ルト4をゆるく仮り止めする。
However, when the timing belt tensioner 1 of the present invention is used for applying tension to a timing belt 27 that winds around gears 25 and 26 that are fixed to a crankshaft and a camshaft as shown in FIG. A screw hole 19 for screwing the fixing bolt 4 and a screw hole 20 for fixing the tightening bolt 21 passing through the arcuate groove 12 are bored close to the outside of the belt running line, and the presser plate 16 is inserted into the through hole. 17 is aligned and fitted to the through hole 11 of the substrate 6, and the fixing bolt 4 is loosely temporarily fastened via a washer 29 that passes through the through hole 17 and the through hole 11.

なおネジ穴20にも締付ボルト21を基板6を円弧溝1
2でガイドできる程度に仮着しておく。
In addition, insert the tightening bolt 21 into the screw hole 20 and insert the board 6 into the arc groove 1.
Wear it temporarily so that you can guide it in Step 2.

しかる後張力設定用バネ13をシリンダブロック7等の
エンジンの静止部材の前面に設けられた係止部材30で
張力設定用バネ13の一端を係止しかつその他端を基板
6のバネ受5に係着することにより、基板6は固定ボル
ト4を中心としてその張力設定用バネ13の張力に応じ
て内輪2を回動しベルトプーリ3によってタイミングベ
ルト27に所定の張力を付与しうる。
After that, one end of the tension setting spring 13 is locked with a locking member 30 provided on the front of a stationary member of the engine such as the cylinder block 7, and the other end is connected to the spring receiver 5 of the base plate 6. By being engaged, the board 6 can rotate the inner ring 2 around the fixing bolt 4 according to the tension of the tension setting spring 13, and apply a predetermined tension to the timing belt 27 by the belt pulley 3.

その後締付ボルト21を締付けたのち固定ボルト4を強
圧しベルトテンショナ1を固定する。
Thereafter, after tightening the tightening bolt 21, the fixing bolt 4 is strongly pressed to fix the belt tensioner 1.

このように本考案のベルトテンショナ1にわいてはまず
固定ボルト4が内輪2に偏心してかつその内部を挿通す
るごとく取付けられており、又、張力設定は張力設定用
バネ13で行なうようにしているため、従来装置のよう
に、その基板6にネジリ荷重等作用することがなくタイ
ミングベルト27を常にシリンダブロック7に対して直
角に案内しうるとともに、張力設定に際しても特別な工
具を用いる必要がなく、さらに、固定ボルト4とバネ受
5との間の距離Rと固定ピン4と内輪2の中心Aとの間
の距離rとのレバー比が大となり、従って弱い張力の安
定した張力設定用バネ13によって正確な張力の設定が
可能となる。
As described above, in the belt tensioner 1 of the present invention, the fixing bolt 4 is eccentrically attached to the inner ring 2 and is inserted through the inner ring 2, and the tension is set using the tension setting spring 13. Therefore, unlike conventional devices, the timing belt 27 can always be guided at right angles to the cylinder block 7 without any torsional load acting on the substrate 6, and there is no need to use a special tool when setting the tension. In addition, the lever ratio between the distance R between the fixing bolt 4 and the spring receiver 5 and the distance r between the fixing pin 4 and the center A of the inner ring 2 is large, so that it is possible to set a stable tension even when the tension is weak. The spring 13 allows accurate tension setting.

又極めてコンパクトに形成しうるためエンジンのレイア
ウトに融通性をもたらしうる。
Furthermore, since it can be formed extremely compactly, flexibility can be provided in the layout of the engine.

第3〜4図はさらに本考案の他の実施例を示す。3-4 further show other embodiments of the present invention.

本実施例においては内輪2は比較的大きな内径を有しか
つ該内輪2にはその軸心と偏心した位置に透孔11を設
けかつ該透孔11を曲率中心とする円弧溝12を形成し
てなる円筒8を内輪2に圧入してなる。
In this embodiment, the inner ring 2 has a relatively large inner diameter, and a through hole 11 is provided in the inner ring 2 at a position eccentric to its axis, and an arcuate groove 12 is formed with the through hole 11 as the center of curvature. The cylinder 8 is press-fitted into the inner ring 2.

かつ該円筒8はシリンダブロック7側に形成された周鍔
35で基板6を溶着している。
Further, the cylinder 8 has the substrate 6 welded to it at a peripheral flange 35 formed on the cylinder block 7 side.

該基板6はベルトプーリ3外周方向に延長されかつその
先端にバネ受5を設けている。
The base plate 6 extends in the direction of the outer circumference of the belt pulley 3 and has a spring receiver 5 at its tip.

なお本実施例においては固定ボルト4は寸切りボルト状
に形成され、その中央部に平面に切欠いてなる係止部3
6によってあらかじめシリンダブロック7等のエンジン
の静止部材に螺着てき又その固定にあたってはナツト3
7を用いて第1〜2図に示した実施例と同様に固定しう
る。
In this embodiment, the fixing bolt 4 is formed in the shape of a threaded bolt, and a locking part 3 formed by a flat notch is provided in the center of the fixing bolt 4.
6 is screwed onto a stationary member of the engine such as the cylinder block 7 in advance, and in order to secure it, use nut 3.
7 can be used to fix it in the same manner as in the embodiment shown in FIGS. 1-2.

叙上のごとく本考案のベルトテンショナは、内輪と該内
輪に回転自在に保持されるベルトプーリと、内輪の内部
をかつ偏心して挿通する固定ピンと、該内輪を回動でき
かつベルトプーリをこえる位置でバネ受けを設けた基板
とを有する結果、まず従来装置のように基板上にベルト
プーリを突出させ枢支することもなく従って該基板のネ
ジリにより内輪即ちベルトプーリが基板に対して傾くこ
となく常にシリンダブロックに対して直角にタイミング
ベルトを案内することができその寿命を損じず、又基板
の薄肉化をはかりうるとともに、固定ボルトを取付ける
透孔と内輪の中心との間の距離および透孔とバネ受との
距離との比を大になしうる結果、比較的弱い張力設定バ
ネによってベルトプーリに所定の荷重を作用させ、正し
い張力を設定し付与することができ、かつ締付ボルトの
締付トルクも減じうろことは自明である。
As described above, the belt tensioner of the present invention consists of an inner ring, a belt pulley rotatably held by the inner ring, a fixing pin inserted eccentrically through the inside of the inner ring, and a position that allows the inner ring to rotate and extends beyond the belt pulley. As a result of having a base plate provided with a spring support, the belt pulley does not have to protrude and pivot on the base plate as in conventional devices, and therefore the inner ring, that is, the belt pulley does not tilt with respect to the base board due to torsion of the base plate. The timing belt can always be guided perpendicularly to the cylinder block without damaging its life, and the board can be made thinner, as well as the distance between the through hole for fixing bolts and the center of the inner ring, and the distance between the through hole and the center of the inner ring. As a result, a relatively weak tension setting spring can be used to apply a specified load to the belt pulley to set and apply the correct tension, and the tightening bolt can be It is obvious that the applied torque will also be reduced.

又ベルトテンショナの取付けに際して、張力設定用バネ
により所定の張力を付与しつつ締付ボルトを固定したの
ち、固定ボルトを締付けることにより、固定ボルトの締
付けによる内輪の伴廻りを防ぐことができ、精度のよい
張力の設定が可能となる他、2つのボルトを用いて固定
でき、シリンダブロック等の静止部材への取付けが強固
となることも明白である。
In addition, when installing the belt tensioner, by applying a predetermined tension with the tension setting spring and fixing the tightening bolt, and then tightening the fixing bolt, it is possible to prevent the inner ring from rotating due to the tightening of the fixing bolt, thereby improving accuracy. It is clear that not only can a good tension be set, but also that it can be fixed using two bolts, making it possible to securely attach it to a stationary member such as a cylinder block.

さらにボルトの締付は時には、伴廻り防止のために内輪
を保持する必要がなく、両手作業をなくして片手作業を
可能とすることによって、取付は作業性を向上すること
も容易に理解しうる。
Furthermore, it is easy to understand that bolt tightening sometimes does not require holding the inner ring to prevent tailgating, and that installation improves work efficiency by eliminating the need for both hands and allowing one-handed work. .

さらにその構造を小型化し取付けのためのスペースを減
じる等優れた効果を奏しうる。
Furthermore, the structure can be miniaturized and the installation space can be reduced, resulting in excellent effects.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本考案の一実施例を示す正面図、第2図はその
断面図、第3図は他の実施例を示す正面図、第4図はそ
の断面図、第5図はその使用状態を示す正面図、第6〜
8図は従来装置を示す正面図である。 2・・・・・・内輪、3・・・・・・ベルトプーリ、4
・・・・・・固定ボルト、5・・・・・・バネ受、6・
・・・・・基板、11・・・・・・透孔、12・・・・
・・円弧溝、13・・・・・・張力設定用バネ、21・
・・・・・締付ボルト、27・・・・・・タイミングベ
ルト、A・・・・・・内輪の中心。
Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a front view showing another embodiment, Fig. 4 is a sectional view thereof, and Fig. 5 is its use. Front view showing the state, No. 6~
FIG. 8 is a front view of a conventional device. 2...Inner ring, 3...Belt pulley, 4
...Fixing bolt, 5...Spring holder, 6.
...Substrate, 11...Through hole, 12...
...Circular groove, 13...Tension setting spring, 21.
...Tightening bolt, 27...Timing belt, A...Center of inner ring.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] テンショナを固定する固定ボルト挿通用の透孔を中心か
ら偏位した偏心位置に設けた内輪に基板を固着しかつ基
板の、前記透孔とは前記中心を挟む反対側部分に張力設
定用バネを係着するバネ受けを設けるとともに、前記内
輪に回転自在にベルトプーリを外挿する一方、前記バネ
受と透孔との間かつ透孔とは中心を隔てる位置に、前記
透孔を曲率中心としかつ締付ボルトを挿通しうる円弧溝
を形成してなるタイミングベルト用テンショナ。
A board is fixed to an inner ring in which a through hole for inserting a fixing bolt for fixing the tensioner is provided at an eccentric position offset from the center, and a tension setting spring is installed on the opposite side of the board across the center from the through hole. A spring receiver to be engaged is provided, and a belt pulley is rotatably inserted into the inner ring, and a belt pulley is provided between the spring receiver and the through hole, and the center of curvature is set between the through hole and the through hole. A tensioner for a timing belt that has an arcuate groove into which a tightening bolt can be inserted.
JP18285180U 1980-12-18 1980-12-18 Tensioner for timing belt Expired JPS6032449Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18285180U JPS6032449Y2 (en) 1980-12-18 1980-12-18 Tensioner for timing belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18285180U JPS6032449Y2 (en) 1980-12-18 1980-12-18 Tensioner for timing belt

Publications (2)

Publication Number Publication Date
JPS57104040U JPS57104040U (en) 1982-06-26
JPS6032449Y2 true JPS6032449Y2 (en) 1985-09-27

Family

ID=29981585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18285180U Expired JPS6032449Y2 (en) 1980-12-18 1980-12-18 Tensioner for timing belt

Country Status (1)

Country Link
JP (1) JPS6032449Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59128951U (en) * 1983-02-21 1984-08-30 マツダ株式会社 timing belt tensioner

Also Published As

Publication number Publication date
JPS57104040U (en) 1982-06-26

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