JPH0786326B2 - Belt tension automatic adjustment device - Google Patents
Belt tension automatic adjustment deviceInfo
- Publication number
- JPH0786326B2 JPH0786326B2 JP63124799A JP12479988A JPH0786326B2 JP H0786326 B2 JPH0786326 B2 JP H0786326B2 JP 63124799 A JP63124799 A JP 63124799A JP 12479988 A JP12479988 A JP 12479988A JP H0786326 B2 JPH0786326 B2 JP H0786326B2
- Authority
- JP
- Japan
- Prior art keywords
- tensioner
- roller
- pushing
- belt
- load
- 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
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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/06—Endless member is a belt
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/20—SOHC [Single overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/20—Resin
-
- 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
- F16H2007/0823—Electric actuators
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (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、内燃エンジンのタイミングベルト等のベル
トの張力を自動的に調整するベルト張力自動調整装置に
関する。TECHNICAL FIELD The present invention relates to a belt tension automatic adjusting device for automatically adjusting the tension of a belt such as a timing belt of an internal combustion engine.
(従来の技術及びその問題点) 内燃エンジンのタイミングベルト等のベルト張力は、ベ
ルト張力が内燃エンジンの騒音や振動、更にはベルトの
耐久性に密接に関係するために重要品質管理項目であ
り、内燃エンジンの製造工程において、ベルト張力を所
定値に調整するようにしている。(Prior art and its problems) Belt tension of a timing belt or the like of an internal combustion engine is an important quality control item because the belt tension is closely related to noise and vibration of the internal combustion engine, and further, the durability of the belt, In the manufacturing process of an internal combustion engine, the belt tension is adjusted to a predetermined value.
従来、ベルト張力の調整は、内燃エンジンを停止した状
態で作業員の手感により調整されている。しかしなが
ら、取り付けられるベルトの周長にはばらつきがあり、
このためテンショナスプリング圧もばらつくこと、エン
ジンの停止クランク角度位置毎に変化するベルト張力を
エンジンの停止クランク角度位置との関係で正確に把握
することが困難であること等の理由で作業員の手感によ
るベルト張力調整ではベルト張力を上述の所定値に正確
に調整することが出来ず、従って、品質管理が困難であ
った。Conventionally, the belt tension is adjusted by the operator's hand feeling while the internal combustion engine is stopped. However, there are variations in the circumference of the attached belt,
Therefore, the tensioner spring pressure also fluctuates, and it is difficult to accurately grasp the belt tension that changes for each engine stop crank angle position in relation to the engine stop crank angle position. The belt tension cannot be accurately adjusted to the above-mentioned predetermined value by adjusting the belt tension by the method, and therefore quality control is difficult.
本発明は斯かる問題点を解決するためになされたもの
で、ベルトの張力調整を作業員の手感に頼ることなく、
短時間に、且つ、正確に調整出来るベルト張力自動調整
装置を提供することを目的とする。The present invention has been made to solve such problems, and does not rely on the feel of a worker to adjust the tension of the belt,
An object of the present invention is to provide an automatic belt tension adjusting device that can be adjusted accurately in a short time.
(問題点を解決するための手段) 上述の目的を達成するために本発明のベルト張力自動調
整装置は、内燃エンジンの駆動輪と被駆動輪間に掛回さ
れる無端ベルトを押圧してベルト張力を一定に保つテン
ショナの回転に応動して回転し、且つ、該テンショナを
押圧してテンショナのベルト押圧力を変化させるローラ
と、該ローラを前記テンショナに対して前進及び後退さ
せる、前記内燃エンジンとは別体のローラ駆動手段と、
前記ローラのテンショナ押込み荷重を検出する荷重検出
手段と、前記駆動手段に予め設定された初期押込み量に
対応した駆動信号を出力し、前記荷重検出手段が検出し
たローラのテンショナ押込み荷重及び予め記憶されてい
る目標押込み荷重に応じて前記ローラの押込み量を演算
し、該演算値に応じて前記ローラ駆動手段に駆動信号を
出力するとともに、予め設定された所定回数の調整完了
時の押込み量に応じて前記初期押込み量を設定する制御
手段とを備え、前記内燃エンジンを回転駆動させながら
前記無端ベルトの張力を調整することを特徴とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, a belt tension automatic adjusting device of the present invention is a belt that presses an endless belt that is wound between a driving wheel and a driven wheel of an internal combustion engine. A roller that rotates in response to the rotation of the tensioner that keeps the tension constant, and that presses the tensioner to change the belt pressing force of the tensioner; and the internal combustion engine that moves the roller forward and backward with respect to the tensioner. Roller driving means separate from
A load detecting means for detecting the tensioner pushing load of the roller, and a drive signal corresponding to an initial pushing amount preset to the driving means are outputted, and the tensioner pushing load of the roller detected by the load detecting means is stored in advance. The amount of pushing of the roller is calculated according to the target pushing load, a driving signal is output to the roller driving means according to the calculated value, and the amount of pushing is adjusted at the completion of a preset number of times. Control means for setting the initial pushing amount, and adjusting the tension of the endless belt while rotationally driving the internal combustion engine.
(作用) エンジンの回転駆動中にローラのテンショナ押込み荷重
を検出してこの検出値と目標押込み荷重とに応じてベル
ト張力を調整するために、ベルトの周長のばらつきやエ
ンジンクランク角度位置に関係なくベルト張力を所定値
に調整することを可能にする。(Operation) In order to adjust the belt tension according to the detected value of the roller tensioner pushing load and the detected pushing load while the engine is rotating, it is necessary to relate to the variation of the belt circumference and the engine crank angle position. It is possible to adjust the belt tension to a predetermined value without the need.
(実施例) 以下本発明の一実施例を図面に基づいて詳細に説明す
る。Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.
第1図は本発明に係るベルト張力自動調整装置の全体構
成を示し、この実施例のベルト張力自動調整装置10はV
型6気筒エンジン1のタイミングベルトの張力調整に適
用されたものである。FIG. 1 shows the entire structure of an automatic belt tension adjusting device according to the present invention.
It is applied to the tension adjustment of the timing belt of the 6-cylinder engine 1.
エンジン1の歯付タイミングベルト2は、左バンク1aの
カムシャフトに取り付けられたカムスプロケット3、左
右バンク1a,1b間のシリンダブロック上部に配設された
ウォータポンプの駆動軸に取り付けられたウォータポン
ププーリ5、右バンク1bのカムシャフトに取り付けられ
たカムスプロケット4、クランク軸に取り付けられたク
ランクスプロケット6及びテンショナ8に順次掛回さ
れ、クランク軸の回転を左右バンクのカムシャフト及び
ウォータポンプの駆動軸に伝達する。The toothed timing belt 2 of the engine 1 includes a cam sprocket 3 attached to the cam shaft of the left bank 1a, and a water pump attached to the drive shaft of the water pump arranged above the cylinder block between the left and right banks 1a and 1b. The pulley 5, the cam sprocket 4 attached to the camshaft of the right bank 1b, the crank sprocket 6 attached to the crankshaft, and the tensioner 8 are sequentially wound around, and the rotation of the crankshaft drives the camshafts and water pumps of the left and right banks. Transmit to the shaft.
テンショナ8はタイミングベルト2のルーズサイドに、
即ち、クランクスプロケット6とカムスプロケット3間
に配設される(尚、エンジン1は第1図矢印で示す方向
に回転駆動される)。そして、テンショナ8はテンショ
ナボルト8aにより回転自在にブラケット8bに取り付けら
れ、ブラケット8bは図示しない支軸を中心にテンショナ
8をタイミングベルト2に直交する方向に揺動可能であ
ると共に、テンショナスプリング8cが取り付けられ、テ
ンショナ8はこのテンショナスプリング8cのバネ力によ
り常時タイミングベルト2を所定の押圧力で押圧してい
る。The tensioner 8 is on the loose side of the timing belt 2,
That is, it is arranged between the crank sprocket 6 and the cam sprocket 3 (the engine 1 is rotationally driven in the direction shown by the arrow in FIG. 1). The tensioner 8 is rotatably attached to a bracket 8b by a tensioner bolt 8a. The bracket 8b is capable of swinging the tensioner 8 in a direction orthogonal to the timing belt 2 around a support shaft (not shown) and a tensioner spring 8c. The tensioner 8 is attached and constantly presses the timing belt 2 with a predetermined pressing force by the spring force of the tensioner spring 8c.
本発明に係るベルト張力自動調整装置10は、ハウジング
10aと、テンショナ8に摺接してテンショナ8と共に回
動する一対のローラ(カムフォロア)11,11と、このロ
ーラ11を一端部に回転自在に支持する支持体12と、ハウ
ジング10a内を図示しないガイドレールに沿って移動
し、前記支持体12の他端部12bが固設される基体14と、
パルスモータ15と、及び制御装置20とを含んで構成され
る。The belt tension automatic adjusting device 10 according to the present invention includes a housing.
10a, a pair of rollers (cam followers) 11 and 11 that are in sliding contact with the tensioner 8 and rotate together with the tensioner 8, a support 12 that rotatably supports the roller 11 at one end, and a guide (not shown) inside the housing 10a. A base body 14 which moves along a rail and on which the other end portion 12b of the support body 12 is fixedly mounted,
It is configured to include a pulse motor 15 and a control device 20.
パルスモータ15の駆動軸と基体14とはボール螺子16を介
して接続され、ボール螺子16によりパルスモータ15の回
転運動が基体14の並進運動に変換される。これにより、
詳細は後述するように、基体14が支持体12と共に移動し
てローラ11をテンショナ8に押圧させ、基体14の移動
量、即ち、ローラ11の押込み量に応じてベルト張力が調
整される。The drive shaft of the pulse motor 15 and the base body 14 are connected via a ball screw 16, and the ball screw 16 converts the rotational movement of the pulse motor 15 into a translational movement of the base body 14. This allows
As will be described later in detail, the base 14 moves together with the support 12 to press the roller 11 against the tensioner 8, and the belt tension is adjusted according to the moving amount of the base 14, that is, the pushing amount of the roller 11.
ローラ11のテンショナ押込み荷重は、例えば歪ゲージか
らなるロードセル13により検出され、このロードセル13
は、支持体12の前記他端部12a近傍に取り付けられる。
ロードセル13は電気的に制御装置20の入力側に接続され
る。制御装置20は、ロードセル13からの電圧波形を増幅
する増幅器、ローラ11の押込み量の演算、パルスモータ
15の駆動制御等を行う中央演算装置(CPU)、パルスモ
ータ15への駆動信号の出力タイミング、出力期間等を制
御するシーケンス、中央演算装置が実行する制御プログ
ラム、種々の演算に使用される初期値等を記憶する記憶
装置(これらはいずれも図示せず)、パルスモータ15へ
の駆動信号を出力する駆動回路20a等から構成され、詳
細は後述するように、制御装置20はロードセル13が検出
するローラ11のテンショナ押込み荷重及び目標押込み荷
重に応じてパルスモータ15を正転又は逆転させる駆動信
号をパルスモータ15に供給する。The tensioner pushing load of the roller 11 is detected by the load cell 13 formed of, for example, a strain gauge.
Is attached near the other end 12a of the support 12.
The load cell 13 is electrically connected to the input side of the control device 20. The control device 20 includes an amplifier for amplifying the voltage waveform from the load cell 13, calculation of the pushing amount of the roller 11, and a pulse motor.
A central processing unit (CPU) that controls the drive of 15 etc., a sequence for controlling the output timing of the drive signal to the pulse motor 15, an output period, etc., a control program executed by the central processing unit, an initial used for various calculations It is composed of a storage device that stores values and the like (none of which are shown), a drive circuit 20a that outputs a drive signal to the pulse motor 15, and the like. As will be described later in detail, the control device 20 detects the load cell 13 A drive signal for rotating the pulse motor 15 in the normal or reverse direction is supplied to the pulse motor 15 according to the tensioner pushing load of the roller 11 and the target pushing load.
上述のように構成されるベルト張力自動調整装置10の作
用を第2図及び第3図を参照して説明する。The operation of the belt tension automatic adjusting device 10 configured as described above will be described with reference to FIGS. 2 and 3.
制御装置20の中央演算装置は、第2図に示すベルト張力
調整プログラムのフローチャートに示す手順に従ってパ
ルスモータ15を駆動し、タイミングベルト2の張力を自
動的に調整する。より詳細には、エンジン1を調整架台
(図示せず)に取り付けると共に、ベルト張力自動調整
装置10を所定位置にセットする。このとき、テンショナ
8のテンショナボルト8aを緩め、テンショナ8がブラケ
ット8bに対して相対移動可能状態にしてある。又、テン
ショナスプリング8cはブラケット8bから取り外してあ
り、テンショナ8はローラ11によりタイミングベルト8
に押圧されてタイミングベルト8とベルト張力自動調整
装置10のローラ11間に挟持されている。The central processing unit of the control device 20 drives the pulse motor 15 according to the procedure shown in the flowchart of the belt tension adjusting program shown in FIG. 2 to automatically adjust the tension of the timing belt 2. More specifically, the engine 1 is attached to an adjustment stand (not shown), and the belt tension automatic adjusting device 10 is set at a predetermined position. At this time, the tensioner bolt 8a of the tensioner 8 is loosened so that the tensioner 8 can move relative to the bracket 8b. Further, the tensioner spring 8c is removed from the bracket 8b, and the tensioner 8 is fixed to the timing belt 8 by the roller 11.
It is pressed by and is sandwiched between the timing belt 8 and the roller 11 of the belt tension automatic adjusting device 10.
この状態でベルト張力自動調整装置10を作動させると、
制御装置20は、先ず、第2図に示すプログラムのステッ
プS1を実行し、後述するローラ11による初期押込み量を
演算設定する。この初期押込み量の演算は当該ベルト張
力自動調整装置10により今回調整前に行った所定回数
(例えば、10回)のベルト調整時に記憶した、調整完了
時の押込み量を平均し、これを初期押込み量とするもの
である。このように初期押込み量を演算設定することに
より、ロットの異なるタイミングベルト8が使用されて
も、ロット毎に最適な初期押込み量を学習して設定する
ことが出来、後述するようにロール11の押込み量の補正
を最小回数で済ませることが出来、一台のエンジンのタ
イミングベルトの張力調整に必要なサイクルタイムの短
縮に有効である。When the belt tension automatic adjusting device 10 is operated in this state,
The control device 20 first executes step S1 of the program shown in FIG. 2 to calculate and set an initial pushing amount by the roller 11 described later. The calculation of the initial pushing amount is performed by averaging the pushing amounts at the time of completion of adjustment, which are stored in the belt tension automatic adjusting device 10 when the belt is adjusted a predetermined number of times (for example, 10 times) before the present adjustment and It is a quantity. By calculating and setting the initial pushing amount in this way, even if the timing belts 8 of different lots are used, the optimum initial pushing amount can be learned and set for each lot. The push-in amount can be corrected a minimum number of times, which is effective in reducing the cycle time required for adjusting the tension of the timing belt of one engine.
次に、エンジン1を所定回転数で回転駆動して馴染み運
転を開始する(ステップS3)。通常、エンジン1の回転
初期においてタイミングベルト2とカムスプロケット3,
4等との歯面馴染みのため、通常ベルト張力が著しく低
下する。このため所定時間(例えば、4〜5秒程度)の
馴染み運転が必要である。又、前述の所定回転数は適宜
値に設定することが出来るが、回転数が低く過ぎると調
整時間(サイクルタイム)が掛かり過ぎ、例えば100rpm
程度に設定される。Next, the engine 1 is rotationally driven at a predetermined rotational speed to start a familiar operation (step S3). Normally, the timing belt 2 and the cam sprocket 3, at the beginning of rotation of the engine 1,
Since the tooth surface is familiar with 4 etc., the belt tension usually decreases significantly. Therefore, familiar operation for a predetermined time (for example, about 4 to 5 seconds) is required. Also, the above-mentioned predetermined number of revolutions can be set to an appropriate value, but if the number of revolutions is too low, the adjustment time (cycle time) will be too long, for example 100 rpm.
It is set to a degree.
この馴染み運転中にパルスモータ15の駆動を開始して
(第3図(c)のt1時点)、ローラ11を前記ステップS1
で設定した初期押込み量だけ前進させタイミングベルト
2に初期張力を与える(ステップS5)。第3図(a)に
示す線図は、ロードセル13により検出されるローラ11の
ベルト押込み荷重値LCの時間変化を示するものであり、
第3図(b)はロードセル13によりエンジン1のクラン
ク軸が2回転する間に検出された押込み荷重値LCの平均
値LCAVの時間変化である。During this familiar operation, the driving of the pulse motor 15 is started (time t1 in FIG. 3 (c)), and the roller 11 is moved to the step S1.
The timing belt 2 is advanced by the initial push-in amount set in step 3 to apply initial tension to the timing belt 2 (step S5). The diagram shown in FIG. 3 (a) shows the change over time in the belt pushing load value L C of the roller 11 detected by the load cell 13,
FIG. 3B is a time change of the average value L CAV of the pushing load values L C detected by the load cell 13 while the crankshaft of the engine 1 makes two revolutions.
次いで、エンジン1の馴染み運転が完了したか否かを判
別し(ステップS7)、未だ完了していない場合には馴染
み運転が完了するまで待機する。エンジン1の馴染み運
転が完了する時点t2までにはロードセル13で検出される
押込み荷重平均値LCAVは、第3図(b)に示すように静
定している。従って、馴染み運転が完了した時点(ステ
ップS7の判別結果が肯定(Yes)になった時点)で制御
装置20はロードセル13により検出されるローラ11の押込
み荷重値LCの読み込みを開始し(第3図(c)のt2時
点)、エンジン1のクランク軸が2回転した時点(同図
t3時点)で読み込みを終了し、この間に読み込んだ押込
み荷重値LCの平均値LCAVを演算する(ステップS9)。エ
ンジン1がV型6気筒エンジンであるので動弁機構の弁
開閉タイミングに対応してクランク軸が2回転する間に
ロードセル13の荷重信号値LCのピーク値が3回現れるこ
とになるが、この間に検出した荷重信号値LCを平均する
ことにより時間変化の小さい押込み荷重が求められる。
そして、演算した押込み荷重平均値LCAVと目標荷重Loと
の偏差を求め、この偏差の絶対値が所定値ΔLより小さ
いか否かを判別する(第3図(c)のt4時点及び第2図
のステップS11)。Next, it is determined whether or not the familiar operation of the engine 1 is completed (step S7), and if it is not completed yet, the operation waits until the familiar operation is completed. By the time t2 when the familiar operation of the engine 1 is completed, the indentation load average value L CAV detected by the load cell 13 is settled as shown in FIG. 3 (b). Therefore, when the familiar driving is completed (when the determination result of step S7 is affirmative (Yes)), the control device 20 starts reading the pushing load value L C of the roller 11 detected by the load cell 13 (first At time t2 in FIG. 3 (c), when the crankshaft of the engine 1 makes two revolutions (at the same figure)
At the time of t3), the reading ends, and the average value L CAV of the pushing load values L C read during this period is calculated (step S9). Since the engine 1 is a V-type 6-cylinder engine, the peak value of the load signal value L C of the load cell 13 appears three times while the crankshaft makes two revolutions corresponding to the valve opening / closing timing of the valve operating mechanism. By averaging the load signal values L C detected during this period, a pushing load with a small time change can be obtained.
Then, the deviation between the calculated indentation load average value L CAV and the target load Lo is obtained, and it is determined whether or not the absolute value of this deviation is smaller than a predetermined value ΔL (at time t4 and second time in FIG. 3 (c)). Step S11 in the figure).
ステップS11での判別結果が否定(No)の場合には上述
の偏差に応じてロール11の押込み量をフィードバック補
正する(ステップS13)。押込み量の補正方法としては
種々の方法が考えられるが、偏差の正負、前記所定値Δ
Lとの差等に応じて押込み量の補正値を決定すれば良
い。制御装置20は演算した押込み量の補正値に応じてパ
ルスモータ15に駆動信号を出力し、ローラ11のベルト押
込み荷重を変更してタイミングベルト2のベルト張力を
調整する。そして、ローラ11の押込み量の補正が完了し
た時点(第3図(c)の時点t6及び時点t9)で再び前記
ステップS9に戻ってステップS11での判別結果が肯定と
なるまで繰り返しステップS9、S11及びS13を実行する。If the determination result in step S11 is negative (No), the pushing amount of the roll 11 is feedback-corrected according to the above deviation (step S13). Various methods can be considered as a method of correcting the pushing amount, but the positive / negative of the deviation and the predetermined value Δ
The correction value of the pushing amount may be determined according to the difference from L or the like. The control device 20 outputs a drive signal to the pulse motor 15 according to the calculated correction value of the pushing amount to change the belt pushing load of the roller 11 to adjust the belt tension of the timing belt 2. Then, when the correction of the pushing amount of the roller 11 is completed (time t6 and time t9 in FIG. 3 (c)), the process returns to the step S9 again and the step S9 is repeated until the determination result in the step S11 becomes affirmative. Execute S11 and S13.
ステップS11での判別結果が肯定になると(第3図
(c)のt10時点)、制御装置20はタイミングベルト2
の張力調整が完了したと見做して、張力調整完了時点で
のローラ11の押込み量を前記記憶装置に記憶する(ステ
ップS15)。この記憶値は前述したようにステップS1に
おいて、以後に実行されるタイミングベルト張力調整時
の初期押込み量設定に使用される。次いで、作業者はエ
ンジン1を停止し(ステップS17)、ステップS19におい
てテンショナボルト8aを締め付けてテンショナ8のブラ
ケット8bに対する軸支位置を固定し、更にブラケット8b
にテンショナスプリング8cを取り付けてタイミングベル
ト張力調整を終了する。When the determination result in step S11 is affirmative (at time t10 in FIG. 3C), the control device 20 causes the timing belt 2
On the assumption that the tension adjustment of (1) is completed, the pushing amount of the roller 11 at the time of completion of the tension adjustment is stored in the storage device (step S15). As described above, this stored value is used in step S1 to set the initial pushing amount when adjusting the timing belt tension, which is executed thereafter. Next, the worker stops the engine 1 (step S17), tightens the tensioner bolt 8a in step S19 to fix the axial support position of the tensioner 8 with respect to the bracket 8b, and further the bracket 8b.
Attach the tensioner spring 8c to and finish the timing belt tension adjustment.
尚、タイミングベルトの張力調整されたエンジンは、調
整後に自由振動法、ないしは従来公知のボローズ張力計
法によりエンジン静止状態でのベルト張力が計測されエ
ンジン毎のベルト張力のばらつきが測定される。自由振
動法はタイミングベルトのテンションサイド(カムスプ
ロケット3とウォータポンププーリ5間及びカムスプロ
ケット4とクランクスプロケット6間)及びルーズサイ
ド(テンショナ8とカムスプロケット3間)のベルトを
軽く振動させ、振動数をFFTアナライザで検出し、これ
を平均することによりベルト張力を求める方法である。
この方法は従来公知のボローズ張力計法により求められ
るベルト張力に比べ測定誤差が小さく好ましい。このよ
うにして計測されたエンジン静止時のタイミングベルト
の張力のエンジン毎のばらつきを比較してみると、従来
の手感により調整したものに比較して本発明装置により
ベルト調整したものはエンジン毎のベルト張力のばらつ
きが著しく小さい結果が得られた。After the adjustment of the tension of the timing belt, the belt tension in the stationary state of the engine is measured by the free vibration method or the conventionally known Borrows tensiometer method after the adjustment to measure the variation of the belt tension for each engine. The free vibration method is to vibrate the belt on the tension side (between cam sprocket 3 and water pump pulley 5 and between cam sprocket 4 and crank sprocket 6) and loose side (between tensioner 8 and cam sprocket 3) of the timing belt, and Is detected by an FFT analyzer and averaged to find the belt tension.
This method is preferable because the measurement error is smaller than the belt tension obtained by the conventionally known Borrows tensiometer method. When the variations of the tension of the timing belt when the engine is stationary measured in this way are compared for each engine, the belt adjusted by the device of the present invention is different for each engine as compared with the one adjusted by the conventional hand feeling. The result was that the variation in belt tension was extremely small.
上述の実施例では本発明のベルト張力自動調整装置をタ
イミングベルトのベルト張力調整に適用したものを例に
説明したが、これに限定されず、クランクスプロケット
とオルタネータやエアコン用コンプレッサを駆動する駆
動軸に取り付けられたスプロケット間に掛回した無端ベ
ルトのベルト張力調整に適用することも出来る。In the above-mentioned embodiment, the belt tension automatic adjusting device of the present invention is applied to the belt tension adjustment of the timing belt, but the present invention is not limited to this. A drive shaft for driving a crank sprocket, an alternator and an air conditioner compressor. It can also be applied to adjust the belt tension of an endless belt hung between the sprockets attached to the.
(発明の効果) 以上詳述したように本発明のベルト張力自動調整装置に
依れば、内燃エンジンの駆動輪と被駆動輪間に掛回され
る無端ベルトを押圧してベルト張力を一定に保つテンシ
ョナの回転に応動して回転し、且つ、テンショナを押圧
してテンショナのベルト押圧力を変化させるローラと、
ローラをテンショナに対して前進及び後退させる、前記
内燃エンジンとは別体のローラ駆動手段と、前記ローラ
のテンショナ押込み荷重を検出する荷重検出手段と、前
記駆動手段に予め設定された初期押込み量に対応した駆
動信号を出力し、前記荷重検出手段が検出したローラの
テンショナ押込み荷重及び予め記憶されている目標押込
み荷重に応じてローラの押込み量を演算し、該演算値に
応じてローラ駆動手段に駆動信号を出力するとともに、
予め設定された所定回数の調整完了時の押込み量に応じ
て前記初期押込み量を設定する制御手段とを備えて構成
し、内燃エンジンを回転駆動させながら無端ベルトの張
力を調整するようにしたので、ベルト張力を、作業員の
手感に頼ることなく、正確に、且つ、短時間に所定値に
調整することが出来る。(Effects of the Invention) As described in detail above, according to the belt tension automatic adjusting apparatus of the present invention, the belt tension is kept constant by pressing the endless belt that is wound between the driving wheel and the driven wheel of the internal combustion engine. A roller that rotates in response to the rotation of the tensioner and that presses the tensioner to change the belt pressing force of the tensioner,
A roller driving means separate from the internal combustion engine for moving the roller forward and backward with respect to the tensioner, a load detecting means for detecting a tensioner pushing load of the roller, and an initial pushing amount preset in the driving means. A corresponding drive signal is output, the pushing amount of the roller is calculated according to the roller tensioner pushing load detected by the load detecting means and the target pushing load stored in advance, and the roller driving means is calculated according to the calculated value. While outputting the drive signal,
A control means for setting the initial pushing amount according to the pushing amount at the completion of the preset number of adjustments is configured, and the tension of the endless belt is adjusted while the internal combustion engine is rotationally driven. The belt tension can be adjusted to a predetermined value accurately and in a short time without depending on the hand feeling of the operator.
図面は本発明の一実施例を示し、第1図は本発明に係る
ベルト張力自動調整装置の全体構成図、第2図は同ベル
ト張力自動調整装置によりベルト張力を調整する手順を
示すフローチャート、第3図は第1図に示すベルト張力
自動調整装置のロードセル13が検出するローラ11の押込
み荷重LCの時間変化、同押込み荷重平均値LCAVの時間変
化、及び同押込み荷重LCの計測タイミングの関係を示す
グラフである。 1……内燃エンジン、2……タイミングベルト(無端ベ
ルト)、3,4……カムスプロケット(被駆動輪)、6…
…クランクスプロケット(駆動輪)、8……テンショ
ナ、8a……テンショナボルト、8c……テンショナスプリ
ング、10……ベルト張力自動調整装置、11……ローラ、
13……ロードセル(荷重検出手段)、15……パルスモー
タ(ローラ駆動手段)、20……制御装置(制御手段)。The drawings show an embodiment of the present invention, FIG. 1 is an overall configuration diagram of a belt tension automatic adjusting device according to the present invention, and FIG. 2 is a flowchart showing a procedure for adjusting belt tension by the belt tension automatic adjusting device, FIG. 3 shows the time change of the pushing load L C of the roller 11 detected by the load cell 13 of the automatic belt tension adjusting device shown in FIG. 1, the time change of the same pushing load average value L CAV , and the measurement of the pushing load L C. It is a graph which shows the relationship of timing. 1 ... Internal combustion engine, 2 ... Timing belt (endless belt), 3,4 ... Cam sprocket (driven wheel), 6 ...
… Crank sprocket (driving wheel), 8 …… tensioner, 8a …… tensioner bolt, 8c …… tensioner spring, 10 …… automatic belt tension adjusting device, 11 …… roller,
13 ... Load cell (load detection means), 15 ... Pulse motor (roller drive means), 20 ... Control device (control means).
Claims (1)
される無端ベルトを押圧してベルト張力を一定に保つテ
ンショナの回転に応動して回転し、且つ、該テンショナ
を押圧してテンショナのベルト押圧力を変化させるロー
ラと、該ローラを前記テンショナに対して前進及び後退
させる、前記内燃エンジンと別体のローラ駆動手段と、
前記ローラのテンショナ押込み荷重を検出する荷重検出
手段と、前記駆動手段に予め設定された初期押込み量に
対応した駆動信号を出力し、前記荷重検出手段が検出し
たローラのテンショナ押込み荷重及び予め記憶されてい
る目標押込み荷重に応じて前記ローラの押込み量を演算
し、該演算値に応じて前記ローラ駆動手段に駆動信号を
出力するとともに、予め設定された所定回数の調整完了
時の押込み量に応じて前記初期押込み量を設定する制御
手段とを備え、前記内燃エンジンを回転駆動させながら
前記無端ベルトの張力を調整することを特徴とするベル
ト張力自動調整装置。Claim: What is claimed is: 1. An endless belt wound between a driving wheel and a driven wheel of an internal combustion engine is pressed to rotate in response to the rotation of a tensioner that keeps the belt tension constant, and the tensioner is pressed. A roller for changing the belt pressing force of the tensioner, and a roller driving means separate from the internal combustion engine for moving the roller forward and backward with respect to the tensioner,
A load detecting means for detecting the tensioner pushing load of the roller, and a drive signal corresponding to an initial pushing amount preset to the driving means are outputted, and the tensioner pushing load of the roller detected by the load detecting means is stored in advance. The amount of pushing of the roller is calculated according to the target pushing load, a driving signal is output to the roller driving means according to the calculated value, and the amount of pushing is adjusted at the completion of a preset number of times. And a control means for setting the initial pushing amount and adjusting the tension of the endless belt while rotating the internal combustion engine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63124799A JPH0786326B2 (en) | 1988-05-20 | 1988-05-20 | Belt tension automatic adjustment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63124799A JPH0786326B2 (en) | 1988-05-20 | 1988-05-20 | Belt tension automatic adjustment device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01310125A JPH01310125A (en) | 1989-12-14 |
JPH0786326B2 true JPH0786326B2 (en) | 1995-09-20 |
Family
ID=14894414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63124799A Expired - Fee Related JPH0786326B2 (en) | 1988-05-20 | 1988-05-20 | Belt tension automatic adjustment device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0786326B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107191555A (en) * | 2017-07-21 | 2017-09-22 | 无锡市朗迪测控技术有限公司 | BSG electromechanical testing platform belt stretchers |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9813961D0 (en) | 1998-06-30 | 1998-08-26 | Renold Plc | Method and apparatus for tensioning a chain of an internal combustion engine |
KR100439912B1 (en) * | 2001-10-17 | 2004-07-12 | 기아자동차주식회사 | Apparatus for controlling and warning a tension of a v-belt |
US6834228B2 (en) | 2001-10-25 | 2004-12-21 | The Gates Corporation | Belt drive system with automatic belt tension control |
CN103313869B (en) | 2010-09-10 | 2016-02-17 | 利滕斯汽车合伙公司 | Intelligent belt drive system and method |
US9334932B2 (en) | 2011-05-13 | 2016-05-10 | Litens Automotive Partnership | Intelligent belt drive system and method |
US9464697B2 (en) | 2011-09-05 | 2016-10-11 | Litens Automotive Partnership | Intelligent belt drive system and method |
US9447850B2 (en) | 2012-04-28 | 2016-09-20 | Litens Automotive Partnership | Adjustable tensioner |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59107357U (en) * | 1983-01-11 | 1984-07-19 | トヨタ自動車株式会社 | Tension adjustment device |
JPS61164850U (en) * | 1985-04-01 | 1986-10-13 |
-
1988
- 1988-05-20 JP JP63124799A patent/JPH0786326B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107191555A (en) * | 2017-07-21 | 2017-09-22 | 无锡市朗迪测控技术有限公司 | BSG electromechanical testing platform belt stretchers |
Also Published As
Publication number | Publication date |
---|---|
JPH01310125A (en) | 1989-12-14 |
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