JPH10111105A - Method and device for measuring camshaft - Google Patents
Method and device for measuring camshaftInfo
- Publication number
- JPH10111105A JPH10111105A JP26209096A JP26209096A JPH10111105A JP H10111105 A JPH10111105 A JP H10111105A JP 26209096 A JP26209096 A JP 26209096A JP 26209096 A JP26209096 A JP 26209096A JP H10111105 A JPH10111105 A JP H10111105A
- Authority
- JP
- Japan
- Prior art keywords
- measuring
- camshaft
- journal
- diameter
- cam
- 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
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車エンジン等
のカムシャフトのジャーナル部とカム部の寸法測定方法
とその測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the dimensions of a journal and a cam of a camshaft of an automobile engine and the like, and a measuring device therefor.
【０００２】[0002]
【従来の技術】図８に自動車エンジンに使用されるカム
シャフト１の一例を示すと、これは複数のジャーナル部
２とカム部３を同軸に一体に有する。図８の右２箇所の
ジャーナル部２の各々の両側に一対ずつのカム部３が形
成され、各隣接するジャーナル部２とカム部３の最小径
外周の段差量が後述するように測定される。2. Description of the Related Art FIG. 8 shows an example of a camshaft 1 used in an automobile engine. The camshaft 1 has a plurality of journal portions 2 and cam portions 3 coaxially and integrally. A pair of cam portions 3 are formed on both sides of each of the two right journal portions 2 in FIG. 8, and the amount of step difference of the minimum diameter outer periphery of each adjacent journal portion 2 and cam portion 3 is measured as described later. .
【０００３】図９にカムシャフト１のカム部３で直接に
開閉制御されるエンジンのバルブ５を示すと、このバル
ブ５はシリンダヘッドの燃料通路４を開閉するもので、
上端にバルブクリアランス調整用シム６を有する。図９
（Ａ）の状態は、カム部３のカム山がシム６を介してバ
ルブ５をスプリング７のバネ力に抗して押し下げ、バル
ブ５を開いた状態が示される。この図９（Ａ）の状態で
カムシャフト１が１８０゜前後回転すると、図９（Ｂ）
に示すようにカム部３のカム山がシム６から離れ、バル
ブ５がスプリング７の復元力で押し上げられてバルブ５
が閉じる。FIG. 9 shows a valve 5 of an engine which is directly controlled to open and close by a cam portion 3 of a camshaft 1. The valve 5 opens and closes a fuel passage 4 of a cylinder head.
A shim 6 for adjusting valve clearance is provided at the upper end. FIG.
(A) shows a state in which the cam peak of the cam portion 3 pushes down the valve 5 via the shim 6 against the spring force of the spring 7 and the valve 5 is opened. When the camshaft 1 rotates around 180 ° in the state of FIG. 9A, FIG.
As shown in the figure, the cam peak of the cam portion 3 is separated from the shim 6, and the valve 5 is pushed up by the restoring force of the spring 7, so that the valve 5
Closes.
【０００４】このバルブ閉時においては、カム部３の外
周とシム６の間に通常において［0.25±0.04］ｍｍの許
容範囲の隙間ｇが形成されることが要求される。即ち、
隙間ｇが０であるとバルブ５が開く可能性があるため、
隙間ｇを許容範囲に設定する必要があり、この隙間設定
をするのがバルブクリアランス調整の作業工程で、カム
シャフト１の隣接するジャーナル部２の外周とカム部３
の最小径外周の段差量ｈを測定し、この測定値からシム
６の板厚を選定して隙間ｇを許容範囲内になるように調
整している。When the valve is closed, it is required that a gap g having an allowable range of [0.25 ± 0.04] mm is normally formed between the outer periphery of the cam portion 3 and the shim 6. That is,
If the gap g is 0, the valve 5 may open,
It is necessary to set the gap g within an allowable range. Setting this gap is a work process of adjusting the valve clearance, and the outer circumference of the journal portion 2 adjacent to the camshaft 1 and the cam portion 3 are set.
Is measured, the thickness of the shim 6 is selected from the measured value, and the gap g is adjusted to be within an allowable range.
【０００５】カムシャフト１の隣接するジャーナル部２
の外周とカム部３の最小径外周との段差の測定は、例え
ば図１０（Ａ）及び（Ｂ）に示すような測定ヘッド８を
使って行われている。同図の測定ヘッド８は、カムシャ
フト１の１箇所のジャーナル部２とその両側のカム部３
の最小径外周の段差量を測定するもので、３基の平行な
リニアスケール９を一体に備える。各リニアスケール９
は、夫々１本ずつピン状の測子１０を同軸に有する。各
測子１０は、リニアスケール９に内蔵されたバネ（図示
しない）のバネ力でリニアスケール９の先端から所定長
だけ突出している。[0005] The adjacent journal portion 2 of the camshaft 1
The step between the outer circumference of the cam section 3 and the outer circumference of the minimum diameter of the cam section 3 is measured using a measuring head 8 as shown in FIGS. 10A and 10B, for example. The measuring head 8 shown in FIG. 1 includes a journal portion 2 of a camshaft 1 and cam portions 3 on both sides thereof.
, And is provided with three parallel linear scales 9 integrally. Each linear scale 9
Has a pin-shaped probe 10 coaxially one by one. Each probe 10 protrudes by a predetermined length from the tip of the linear scale 9 by the spring force of a spring (not shown) built in the linear scale 9.
【０００６】測定ヘッド８によるカムシャフト段差測定
は、次の要領で行われる。まず、図１０（Ａ）に示すよ
うに、各リニアスケール９の測子１０の先端にストレー
トなマスターシャフト２０を押し当て、各測子１０をリ
ニアスケール９に所望量だけ退入させ、このときの測子
退入量を測定して測定基準値とする。次に、マスターシ
ャフト２０を取り除き、代わりに図１０（Ｂ）に示すよ
うに各測子１０にカムシャフト１のジャーナル部２とカ
ム部３の外周を押し当て、夫々の測子１０の退入量を測
定して、この測定値と先の測定基準値を比較してジャー
ナル部２とカム部３の段差量ｈを測定する。The measurement of the camshaft step by the measuring head 8 is performed in the following manner. First, as shown in FIG. 10A, a straight master shaft 20 is pressed against the tip of the probe 10 of each linear scale 9, and each probe 10 is retracted into the linear scale 9 by a desired amount. Is measured and set as a measurement reference value. Next, the master shaft 20 is removed, and instead, the outer peripheries of the journal portion 2 and the cam portion 3 of the cam shaft 1 are pressed against each probe 10 as shown in FIG. The amount is measured, and the measured value is compared with the previous measurement reference value to measure the step difference h between the journal portion 2 and the cam portion 3.
【０００７】[0007]
【発明が解決しようとする課題】ところで、図９（Ｂ）
のバルブ閉状態において、カムシャフト１のジャーナル
部２の直径とこのジャーナル部２をシリンダヘッドに支
持する軸受穴の間に寸法誤差が生じて、シリンダヘッド
でのジャーナル部２の取付位置が変位すると、その変位
量に応じて段差量ｈから求められた隙間ｇに誤差が生じ
て、設定される隙間ｇの精度が低下し、悪くすると隙間
ｇが許容範囲から外れることがある。そのため、カムシ
ャフトのジャーナル部とカム部の段差測定によるバルブ
クリアランス調整の信頼性が悪いのが現状である。However, FIG. 9B
In the valve closed state described above, when a dimensional error occurs between the diameter of the journal portion 2 of the camshaft 1 and the bearing hole that supports the journal portion 2 on the cylinder head, and the mounting position of the journal portion 2 on the cylinder head is displaced. In addition, an error may occur in the gap g obtained from the step amount h in accordance with the displacement amount, and the accuracy of the set gap g may be reduced. Therefore, at present, the reliability of the valve clearance adjustment based on the measurement of the level difference between the journal portion and the cam portion of the camshaft is poor.
【０００８】そこで、本発明者は上記信頼性の改善策と
して、カムシャフトのジャーナル部とカム部の段差測定
と、ジャーナル部の直径測定を別々の測定装置を使って
行い、段差測定値によるバルブクリアランス調整の計算
式にジャーナル部直径測定値を補正値として組み込んで
バルブクリアランス調整を行えば、その信頼性が上がる
ことを確認した。また、ジャーナル部の直径測定は、各
種の直径測定専用のゲージ類を使用すれば正確に行うこ
とができることも確認した。Therefore, as a measure for improving the reliability, the present inventor measures the level difference between the journal portion and the cam portion of the camshaft and the diameter of the journal portion using separate measuring devices, and measures the valve based on the measured level difference. It has been confirmed that the reliability is improved by adjusting the valve clearance by incorporating the measured value of the diameter of the journal as a correction value into the calculation formula of the clearance adjustment. It was also confirmed that the diameter measurement of the journal portion can be accurately performed by using various kinds of gauges dedicated to diameter measurement.
【０００９】しかし、カムシャフトのジャーナル部とカ
ム部の段差測定と、ジャーナル部の直径測定を別々の測
定装置で別工程で行うとなると、１回のバルブクリアラ
ンス調整の作業にかなりの労力と長時間を要する。ま
た、段差測定工程に直径測定工程を加えて実施すると、
特に直径測定専用の測定装置が高価となって測定設備全
体の設備投資費が高価になる不具合もあって、直径測定
工程の追加実施が難しかった。However, if the measurement of the step between the journal portion and the cam portion of the camshaft and the measurement of the diameter of the journal portion are performed in separate processes using separate measuring devices, a considerable amount of labor and time is required for one valve clearance adjustment operation. Takes time. In addition, if the step measurement step is performed in addition to the diameter measurement step,
In particular, it was difficult to additionally perform the diameter measuring step, because there was a problem that the measuring device dedicated to diameter measurement became expensive and the capital investment cost of the entire measuring equipment was high.
【００１０】それ故に、本発明の目的とするところは、
カムシャフトのジャーナル部とカム部の段差測定とジャ
ーナル部の直径測定を短時間で、設備投資的有利に測定
するカムシャフト測定方法と測定装置を提供することに
ある。Therefore, the object of the present invention is to
It is an object of the present invention to provide a camshaft measuring method and a measuring device for measuring a step between a journal portion and a cam portion of a camshaft and measuring a diameter of the journal portion in a short time and with an advantage of capital investment.
【００１１】[0011]
【課題を解決するための手段】上記目的を達成する本発
明方法は、カムシャフトの隣接するジャーナル部とカム
部の外周の各々に同一方向からリニアスケールの測子を
押し当ててジャーナル部とカム部の外周の段差量を測定
すると共に、ジャーナル部の外周に押し当てた測子とこ
の測子と１８０゜反対方向からジャーナル部外周に押し
当てた別の直径測定用測子でもってジャーナル部の直径
も測定することにある。SUMMARY OF THE INVENTION In order to achieve the above object, a method of the present invention comprises pressing a linear scale probe against the adjacent journal portion of a camshaft and the outer periphery of the cam portion in the same direction from the journal portion and the cam. In addition to measuring the level difference of the outer periphery of the journal portion, the probe was pressed against the outer periphery of the journal portion and another diameter measuring probe pressed against the outer periphery of the journal portion from the opposite direction by 180 °. It also consists in measuring the diameter.
【００１２】ここで、カムシャフトの隣接するジャーナ
ル部とカム部の外周の段差を測定するリニアスケールに
は既存のものを使用すればよく、かつ、この種リニアス
ケールによる段差測定方法は従来同様に行えばよい。本
発明方法においては、リニアスケールによる段差測定時
に、カムシャフトのジャーナル部に接触してカム部との
段差測定を行うリニアスケールでジャーナル部の直径を
も測定するようにしている。Here, an existing scale may be used as the linear scale for measuring the step on the outer periphery of the cam section and the journal section adjacent to the camshaft, and the step measuring method using this type of linear scale is the same as in the conventional case. Just do it. In the method of the present invention, at the time of measuring the level difference using the linear scale, the diameter of the journal portion is also measured using a linear scale that measures the level difference from the cam portion by contacting the journal portion of the camshaft.
【００１３】上記測定方法を実施する本発明装置は、カ
ムシャフトの隣接するジャーナル部とカム部の外周の各
々に同一方向から弾圧接触してジャーナル部とカム部の
外周の段差量を測定する測子を有する複数のリニアスケ
ールと、各リニアスケールを一体に支持する測定ヘッド
と、測定ヘッドをリニアスケールの測子軸方向に移動可
能に保持するヘッド駆動源と、測定ヘッドに相対移動可
能に連結され、カムシャフトのジャーナル部の外周に押
し当てられる段差測定用測子と１８０゜反対方向からジ
ャーナル部外周に押し当てられる直径測定用測子を先端
に有する測定アームとを具備する。この測定装置の場
合、カムシャフトのジャーナル部とカム部の外周に対応
するリニアスケールの測子を弾圧接触させたまま、ヘッ
ド駆動源で測定ヘッドを測定アームの測子がジャーナル
部に当接する位置まで移動させて、ジャーナル部とカム
部の段差量とジャーナル部の直径を測定する。The apparatus according to the present invention for implementing the above-described measuring method is a measuring method for measuring the step difference between the journal portion and the outer periphery of the cam portion by making elastic contact with each of the adjacent journal portion of the camshaft and the outer periphery of the cam portion from the same direction. A plurality of linear scales each having a probe, a measuring head that integrally supports each linear scale, a head drive source that holds the measuring head movably in the direction of the linear axis of the linear scale, and a movably connected head to the measuring head The camshaft has a step measuring probe pressed against the outer periphery of the journal portion of the camshaft and a measuring arm having a diameter measuring probe pressed against the outer periphery of the journal portion from the opposite direction by 180 °. In the case of this measuring device, the measuring head is moved by the head drive source while the journal of the camshaft and the linear scale corresponding to the outer periphery of the cam are in elastic contact with each other. To measure the amount of step between the journal and cam and the diameter of the journal.
【００１４】ここで、リニアスケールと測定ヘッドを可
動に支持するヘッド駆動源はエアーシリンダやスプリン
グ等が可能であるが、微妙で高精度な駆動制御を行う上
でエアーシリンダが望ましい。Here, the head drive source for movably supporting the linear scale and the measuring head can be an air cylinder, a spring, or the like. However, an air cylinder is desirable for performing delicate and highly accurate drive control.
【００１５】[0015]
【発明の実施の形態】以下、本発明方法の実施装置例を
図１乃至図７を参照して説明する。尚、この実施例は図
８のカムシャフト１の隣接するジャーナル部２の外周と
カム部３の最小径外周の段差量と、ジャーナル部２の直
径を測定するカムシャフト測定装置１１である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a method according to the present invention; FIG. This embodiment is a camshaft measuring device 11 for measuring the step difference between the outer circumference of the adjacent journal portion 2 of the camshaft 1 and the minimum outer circumference of the cam portion 3 and the diameter of the journal portion 2 in FIG.
【００１６】図１及び図２は、ジャーナル部２とカム部
３の段差量とカム部３の直径の測定時での要部の側面図
及び正面図である。図３及び図４は、図１のカムシャフ
ト測定装置１１が設置される測定設備全体の具体例を示
す正面図及び側面図で、この設備から説明する。FIGS. 1 and 2 are a side view and a front view, respectively, of a main part when measuring the step amount between the journal portion 2 and the cam portion 3 and the diameter of the cam portion 3. FIGS. 3 and 4 are a front view and a side view showing a specific example of the entire measuring equipment in which the camshaft measuring device 11 of FIG. 1 is installed.
【００１７】門形のフレーム２１に水平な昇降台２２が
上下動可能に連結され、昇降台２２上に一対のシャフト
支持部２３が設置される。昇降台２２は、その下部に配
置されたシリンダ２４でもって図４実線の下限位置と図
４鎖線の上限位置の間を上下動する。一対のシャフト支
持部２３は同一構造で、各々がカムシャフト１を水平に
脱着可能に位置決めして支持する。このシャフト支持部
２３は、カムシャフト１の両端を適宜挾持する一対の支
持ピン２５、この支持ピン２５を軸方向に前後動させ、
かつ、回転させてカムシャフト１を周方向に回転させる
ピン駆動機構２６を備える。A horizontal elevator 22 is vertically movably connected to the gate-shaped frame 21, and a pair of shaft supports 23 are installed on the elevator 22. The lift 22 is moved up and down between the lower limit position of the solid line in FIG. 4 and the upper limit position of the chain line in FIG. 4 by the cylinder 24 arranged at the lower part. The pair of shaft support portions 23 has the same structure, and each positions and supports the camshaft 1 so as to be detachable horizontally. The shaft support portion 23 has a pair of support pins 25 for appropriately holding both ends of the camshaft 1 and moves the support pins 25 back and forth in the axial direction.
Further, a pin drive mechanism 26 for rotating the camshaft 1 in the circumferential direction by rotating it is provided.
【００１８】一対のシャフト支持部２３の真上のフレー
ム２１に一対のカムシャフト測定装置１１が設置され
る。一対のカムシャフト測定装置１１は同一構造で、以
下、その一方を説明する。カムシャフト測定装置１１は
夫々に測子１３を有する複数のリニアスケール１２と、
これを鉛直に支持する測定ヘッド１４と、測定ヘッド１
４を上下動可能に保持するヘッド駆動源例えばエアーシ
リンダ１５と、測定ヘッド１４に相対移動可能に連結さ
れた直径測定用測定アーム１６を有する。エアーシリン
ダ１５がフレーム２１に固定されて、測定ヘッド１４を
上下動可能に保持する。A pair of camshaft measuring devices 11 are installed on a frame 21 directly above a pair of shaft support portions 23. The pair of camshaft measuring devices 11 have the same structure, and one of them will be described below. The camshaft measuring device 11 includes a plurality of linear scales 12 each having a probe 13,
A measuring head 14 for vertically supporting this, and a measuring head 1
It has a head drive source, for example, an air cylinder 15 that holds the 4 movably, and a measuring arm 16 for diameter measurement that is connected to the measuring head 14 so as to be relatively movable. An air cylinder 15 is fixed to the frame 21 and holds the measuring head 14 so as to be vertically movable.
【００１９】シャフト支持部２３に支持されたカムシャ
フト１の複数のジャーナル部２とカム部３の真上に１基
ずつのリニアスケール１２が設置される。図３におい
て、カムシャフト１の左端のジャーナル部２に対して１
基のリニアスケール１２が測定ヘッド１４1 に支持さ
れ、図３のカムシャフト１の中央のジャーナル部２とそ
の両側のカム部３に対して３基のリニアスケール１２が
測定ヘッド１４2 に支持され、図３のカムシャフト１の
右端のジャーナル部２とその両側のカム部３に対して３
基のリニアスケール１２が測定ヘッド１４3 に支持され
る。One linear scale 12 is installed just above the plurality of journals 2 and the cam 3 of the camshaft 1 supported by the shaft support 23. In FIG. 3, the left end of the camshaft 1 is
Linear scale 12 of the base is supported on the measuring head 14 1, the linear scale 12 of the 3 groups with respect to the center of the journal portion 2 and the cam portion 3 on both sides of the camshaft 1 of FIG. 3 is supported by the measuring head 14 2 3 with respect to the journal part 2 at the right end of the camshaft 1 in FIG.
Linear scale 12 of the base is supported on the measuring head 14 3.
【００２０】各測定ヘッド１４1 〜１４3 が１基ずつの
エアーシリンダ１５でフレーム２１に対して上下動可能
に支持され、各測定ヘッド１４1 〜１４3 に１本ずつ測
定アーム１６が連結される。測定ヘッド１４1 は、図３
のカムシャフト１の左端のジャーナル部２の直径を測定
する。測定ヘッド１４2 は、図３のカムシャフト１の中
央のジャーナル部２の直径とその両側のカム部３との段
差量を測定する。測定ヘッド１４3 は、図３のカムシャ
フト１の右端のジャーナル部２の直径とその両側のカム
部３との段差量を測定する。これら段差量と直径の測定
方法は同じで、以下、３基のカムシャフト１を支持する
測定ヘッド１４［１４2 又は１４3 ］で説明を続行す
る。Each of the measuring heads 14 1 to 14 3 is supported by one air cylinder 15 so as to be vertically movable with respect to the frame 21, and one measuring arm 16 is connected to each of the measuring heads 14 1 to 14 3. You. The measuring head 14 1, Figure 3
The diameter of the journal 2 at the left end of the camshaft 1 is measured. The measuring head 14 2 measures the level difference between the median diameter and the cam portion 3 on both sides of the journal portion 2 of the camshaft 1 of FIG. The measuring head 14 3 measures the level difference between the diameter on both sides of the cam portion 3 that of the rightmost journal portion 2 of the camshaft 1 of FIG. Method of measuring these step amount and diameter the same, or less, to continue the described measuring head 14 for supporting the cam shaft 1 of 3 groups [14 2 or 14 3.
【００２１】図１に図３のカムシャフト測定装置１１の
側面の拡大図を示すと、測定ヘッド１４に支持される３
基の各リニアスケール１２は図１０のリニアスケール９
と同様な既存のものが使用される。各リニアスケール１
２から下方に突出するピン状の測子１３には、図示しな
い内蔵バネによって常時下方に弾圧力が付勢されて、各
測子１３が測定ヘッド１４の水平な下面から突出する。
測子１３の下端に物品を押し当て、物品を真上に押し上
げると測子１３がリニアスケール１２に向かって上昇
し、この上昇量がリニアスケール１２で測定される。測
子１３から物品を離すと、測子１３は内蔵バネのバネ力
で下降して、測定ヘッド１４の下面から所定の長さで突
出する。FIG. 1 is an enlarged view of a side surface of the camshaft measuring device 11 shown in FIG.
Each linear scale 12 is a linear scale 9 shown in FIG.
An existing one similar to is used. Each linear scale 1
A resilient pressure is constantly applied to the pin-shaped probe 13 projecting downward from the lower side by a built-in spring (not shown), and each probe 13 projects from the horizontal lower surface of the measuring head 14.
When the article is pressed against the lower end of the probe 13 and the article is pushed upward, the probe 13 rises toward the linear scale 12, and the amount of the rise is measured by the linear scale 12. When the article is separated from the probe 13, the probe 13 is lowered by the spring force of the built-in spring and protrudes from the lower surface of the measuring head 14 by a predetermined length.
【００２２】測定ヘッド１４の下面中央に１本のＬ形測
定アーム１６が、測定ヘッド１４に固定されたシリンダ
１８で図１の左右方向にスライド移動可能に連結され
る。測定アーム１６の先端には、上向きの直径測定用測
子１７が固定される。この測子１７は、測定アーム１６
がシリンダ１８で図１鎖線位置から実線位置まで前進移
動させられたときに、測定ヘッド１４の中央のリニアス
ケール１２の測子１３の真下で同軸線上で対向する。One L-shaped measuring arm 16 is connected to the center of the lower surface of the measuring head 14 by a cylinder 18 fixed to the measuring head 14 so as to be slidable in the left-right direction in FIG. At the tip of the measuring arm 16, an upward diameter measuring probe 17 is fixed. The probe 17 is connected to the measuring arm 16
When the cylinder 18 is moved forward from the chain line position to the solid line position in FIG. 1 by the cylinder 18, it opposes on the coaxial line immediately below the gauge 13 of the linear scale 12 at the center of the measurement head 14.
【００２３】測定ヘッド１４を支持するエアーシリンダ
１５がフレーム２１に固定され、これのピストンロッド
１９が測定ヘッド１４の全体を上下にフローティング可
能に支持して、カムシャフト１のジャーナル部２の直径
測定を容易にし、かつ、正確なものにする。エアーシリ
ンダ１５へのエアー供給量を制御することで、測定ヘッ
ド１４の高さ調整が行われる。エアーシリンダ１５で測
定ヘッド１４を上昇させた時点で、測定アーム１６の測
子１７がカムシャフト１のジャーナル部２に当接して、
カムシャフト１の直径測定が行われる。この直径測定
は、ジャーナル部２とカム部３の段差測定と同時、或い
は、段差測定直後に行われ、その測定動作要領を次に説
明する。An air cylinder 15 for supporting the measuring head 14 is fixed to a frame 21. A piston rod 19 of the air cylinder 15 supports the entire measuring head 14 so as to be able to float up and down. And make it accurate. The height of the measuring head 14 is adjusted by controlling the amount of air supplied to the air cylinder 15. When the measuring head 14 is raised by the air cylinder 15, the gauge 17 of the measuring arm 16 comes into contact with the journal 2 of the camshaft 1,
The diameter of the camshaft 1 is measured. This diameter measurement is performed simultaneously with or immediately after the step measurement of the journal section 2 and the cam section 3. The procedure of the measurement operation will be described below.
【００２４】図３の測定設備で複数のカムシャフト１の
寸法測定を連続して行う前に、カムシャフト測定装置１
１の各リニアスケール１２の測定基準点を求める。例え
ば図３に示すように昇降台２２が下限位置に在るとき、
シャフト支持部２３に図５の鎖線で示すようなストレー
トなマスターシャフト２０を手動（或いは自動）で設置
して、昇降台２２を上限位置まで上昇させ、マスターシ
ャフト２０で測定ヘッド１４から同一長さで突出する各
リニアスケール１２の測子１３を所定量だけ突き上げ、
このときの各リニアスケール１２の測子退入量を測定し
て測定基準点を求める。Before continuously measuring the dimensions of a plurality of camshafts 1 with the measuring equipment of FIG.
A measurement reference point of each linear scale 12 is obtained. For example, as shown in FIG. 3, when the elevator 22 is at the lower limit position,
A straight master shaft 20 as shown by a chain line in FIG. 5 is manually (or automatically) installed on the shaft support portion 23, and the elevating table 22 is raised to an upper limit position. Push up the probe 13 of each linear scale 12 protruding by a predetermined amount,
At this time, the probe retreat amount of each linear scale 12 is measured to obtain a measurement reference point.
【００２５】尚、図５（Ａ）はカムシャフト測定装置１
１の測定ヘッド１４の側面図が示され、このときの測定
ヘッド１４は固定エアーシリンダ１５に対して下限位置
に在り、測定アーム１６はマスターシャフト２０の上昇
を邪魔しない後退位置に在る。また、図５（Ｂ）は測定
ヘッド１４の部分正面図が示され、３本の測子１３はマ
スターシャフト２０で同一高さまで突き上げられる。こ
のような基準点測定は、図１０（Ａ）の場合と同様に実
施すればよい。FIG. 5A shows a camshaft measuring device 1.
A side view of one of the measuring heads 14 is shown, at which time the measuring head 14 is at a lower limit position with respect to the fixed air cylinder 15, and the measuring arm 16 is at a retracted position that does not hinder the elevation of the master shaft 20. FIG. 5B is a partial front view of the measuring head 14, and the three probes 13 are pushed up to the same height by the master shaft 20. Such a reference point measurement may be performed in the same manner as in the case of FIG.
【００２６】各リニアスケール１２における基準点測定
が終了すると、昇降台２２を下限位置まで下げてシャフ
ト支持部２３からマスターシャフト１を外し、代わりに
図１に示すようにカムシャフト１を取付けて、昇降台２
２を再度上限位置まで上昇させる。この上昇で図６
（Ａ）及び（Ｂ）に示すように、カムシャフト１のジャ
ーナル部２の外周とカム部３の最小径外周の最上位点で
測定ヘッド１４から下方に同一長さで突出した３本の測
子１３が夫々の量だけ突き上げられる。このときの状態
は図１０（Ｂ）と同じ状態で、３基の各リニアスケール
１２における測子１３の退入量を測定し、この測定値と
先の測定基準点を比較すればジャーナル部２と一対のカ
ム部３の段差量が測定される。或いは、次の図７の状態
でジャーナル部２の直径を測定するときに、ジャーナル
部２と一対のカム部３の段差量を測定することも可能で
ある。When the measurement of the reference point on each linear scale 12 is completed, the elevator 22 is lowered to the lower limit position, the master shaft 1 is detached from the shaft support 23, and the camshaft 1 is attached as shown in FIG. Lifting table 2
2 is again raised to the upper limit position. Fig. 6
As shown in FIGS. 3A and 3B, three measuring protrusions projecting downward from the measuring head 14 at the highest point of the outer periphery of the journal portion 2 of the camshaft 1 and the minimum diameter outer periphery of the cam portion 3 by the same length. The child 13 is pushed up by the respective amount. The state at this time is the same as that shown in FIG. 10B. The amount of retreat of the tracing stylus 13 in each of the three linear scales 12 is measured, and the measured value is compared with the previous measurement reference point. And the level difference between the pair of cam portions 3 is measured. Alternatively, when measuring the diameter of the journal portion 2 in the state of FIG. 7 below, it is also possible to measure the step difference between the journal portion 2 and the pair of cam portions 3.
【００２７】カムシャフト１が上限位置まで上昇して各
測子１３を突き上げると、次は図７（Ａ）及び（Ｂ）に
示すように、まず測定アーム１６をシリンダ１８で前進
移動させて、その先端の直径測定用測子１７を測定ヘッ
ド１４の中央の測子１３の真下に位置させる。而して
後、エアーシリンダ１５で測定ヘッド１４を図７（Ａ）
の鎖線位置から実線位置まで持ち上げて、測定アーム１
６の測子１３をジャーナル部２の外周の最下位点に当接
させる。測定ヘッド１４が上昇して測子１７がジャーナ
ル部２に当接する間、測定ヘッド１４の３本の測子１３
は内蔵バネによってジャーナル部２とカム部３の外周の
最上位点に当接したままの状態が維持される。When the camshaft 1 rises to the upper limit position and pushes up each probe 13, the measuring arm 16 is first moved forward by the cylinder 18 as shown in FIGS. 7A and 7B. The tip 17 for measuring the diameter of the tip is located just below the tip 13 in the center of the measuring head 14. Thereafter, the measuring head 14 is moved by the air cylinder 15 as shown in FIG.
From the chain line position to the solid line position, and
6 is brought into contact with the lowest point on the outer periphery of the journal section 2. While the measuring head 14 is raised and the tracing stylus 17 is in contact with the journal portion 2, the three tracing styluses 13 of the measuring head 14 are
Is maintained in contact with the uppermost point on the outer periphery of the journal portion 2 and the cam portion 3 by the built-in spring.
【００２８】従って、ジャーナル部２の外周の最下位点
の測子１７と最上位点の測子１３でジャーナル部２がそ
の直径方向に挾持されて、最下位点の測子１７の位置を
基準に最上位点の測子１３の高さ位置を求めれば、ジャ
ーナル部２の直径が測定される。同時に測定ヘッド１４
の３本の測子１３の高さ位置を求めれば、ジャーナル部
２とカム部３の段差量が求まる。Therefore, the journal portion 2 is clamped in the diametric direction by the lowest point tracing stylus 17 and the highest position tracing 13 on the outer periphery of the journal portion 2 and the position of the lowest point tracing 17 is determined. If the height position of the uppermost point of the tracing stylus 13 is obtained, the diameter of the journal portion 2 is measured. Measuring head 14
If the height positions of the three tracing styluses 13 are obtained, the level difference between the journal 2 and the cam 3 can be obtained.
【００２９】図７の状態でカムシャフト１の１回の段差
測定と直径測定が終了すると、カムシャフト１を定位置
に保持したまま周方向に定角度回転させて、別の箇所で
の段差測定と直径測定を行う。このような複数箇所での
段差測定と直径測定は、カムシャフト１の種類により必
要に応じて行われる。そして、全ての段差測定と直径測
定が終了すると、測定アーム１６を後退させてカムシャ
フト１を下降させ、次のカムシャフト測定動作に移行す
る。When one step measurement and diameter measurement of the camshaft 1 are completed in the state of FIG. 7, the camshaft 1 is rotated at a fixed angle in the circumferential direction while holding the camshaft 1 at a fixed position, and a step measurement at another place is performed. And diameter measurement. Such step measurement and diameter measurement at a plurality of positions are performed as necessary depending on the type of the camshaft 1. When the measurement of all the steps and the measurement of the diameter are completed, the measurement arm 16 is retracted to lower the camshaft 1, and the operation proceeds to the next camshaft measurement operation.
【００３０】以上のように、測定ヘッド１４の３基のリ
ニアスケール１２にはカムシャフト１の段差測定を行う
既存のものが使用でき、このリニアスケール１２の中央
の１基と測定ヘッド１４に追加設置された測定アーム１
６を使用することでカムシャフト１の直径測定が可能と
なる結果、直径測定のための特別なゲージ類と特別な作
業工程が省略できる。As described above, as the three linear scales 12 of the measuring head 14, existing ones for measuring the level difference of the camshaft 1 can be used, and one linear scale 12 at the center of the linear scale 12 and the measuring head 14 are added. Measuring arm 1 installed
As a result of using 6, the diameter of the camshaft 1 can be measured. As a result, special gauges for measuring the diameter and special operation steps can be omitted.
【００３１】[0031]
【発明の効果】本発明によれば、カムシャフトのジャー
ナル部とカム部の段差をリニアスケールで測定すると共
に、同じリニアスケールを使用してジャーナル部の直径
も測定するので、ジャーナル部の直径測定のための特別
な測定装置、測定工程が省略できて、カムシャフトの段
差測定と直径測定を行う測定設備の低コスト化、高能率
化が図れる。また、カムシャフトのジャーナル部とカム
部の段差測定の際のジャーナル部の直径測定が容易に可
能となる結果、自動車エンジンのバルブクリアランス調
整の精度がジャーナル部の直径測定データを補正値とし
て利用することで改善することができ、バルブクリアラ
ンス調整の信頼性が向上する。According to the present invention, the step between the journal and the cam of the camshaft is measured on a linear scale, and the diameter of the journal is measured using the same linear scale. A special measuring device and a measuring step can be omitted, and the cost and efficiency of measuring equipment for measuring the step and diameter of the camshaft can be reduced. In addition, the diameter of the journal portion can be easily measured when measuring the level difference between the journal portion of the camshaft and the cam portion. As a result, the accuracy of the valve clearance adjustment of the automobile engine uses the diameter measurement data of the journal portion as a correction value. This improves the reliability of the valve clearance adjustment.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係るカムシャフト測定装置の実施例を
示す一部断面を含む要部の側面図である。FIG. 1 is a side view of a main part including a partial cross section showing an embodiment of a camshaft measuring device according to the present invention.
【図２】図１装置の一部省略部分を含む正面図である。FIG. 2 is a front view including a partly omitted portion of the apparatus in FIG. 1;
【図３】図１装置を含む測定設備全体の正面図である。FIG. 3 is a front view of the entire measurement facility including the apparatus of FIG. 1;
【図４】図３設備の側面図である。FIG. 4 is a side view of the equipment in FIG. 3;
【図５】図５（Ａ）及び（Ｂ）は図１装置の測定前段階
での部分側面図及び部分正面図である。5 (A) and 5 (B) are a partial side view and a partial front view of the apparatus in FIG. 1 before measurement.
【図６】図６（Ａ）及び（Ｂ）は図１装置の段差測定段
階での部分側面図及び部分正面図である。6 (A) and 6 (B) are a partial side view and a partial front view, respectively, at a step measurement stage of the apparatus in FIG. 1;
【図７】図７（Ａ）及び（Ｂ）は図１装置の段差・直径
測定段階での部分側面図及び部分正面図である。FIGS. 7A and 7B are a partial side view and a partial front view, respectively, at the step / diameter measuring stage of the apparatus of FIG. 1.
【図８】カムシャフトの正面図である。FIG. 8 is a front view of the camshaft.
【図９】自動車エンジンのバブルとカムシャフトの関係
を示す断面図である。FIG. 9 is a sectional view showing a relationship between a bubble and a camshaft of an automobile engine.
【図１０】従来のカムシャフト測定装置を説明するもの
で、図１０（Ａ）は基準点測定時の正面図、図１０
（Ｂ）は段差測定時の正面図である。10A and 10B illustrate a conventional camshaft measuring device. FIG. 10A is a front view when a reference point is measured, and FIG.
(B) is a front view at the time of step measurement.
１ カムシャフト ２ ジャーナル部 ３ カム部 １１ カムシャフト測定装置 １２ リニアスケール １３ 測子 １４ 測定ヘッド １５ ヘッド駆動源（エアーシリンダ） １６ 測定アーム １７ 直径測定用測子 DESCRIPTION OF SYMBOLS 1 Camshaft 2 Journal part 3 Cam part 11 Camshaft measuring device 12 Linear scale 13 Probe 14 Measurement head 15 Head drive source (air cylinder) 16 Measurement arm 17 Diameter measurement probe
Claims (2)
カム部の外周の各々に同一方向からリニアスケールの測
子を押し当ててジャーナル部とカム部の外周の段差量を
測定すると共に、ジャーナル部の外周に押し当てた前記
測子とこの測子と１８０゜反対方向からジャーナル部外
周に押し当てた直径測定用測子でもってジャーナル部の
直径を測定することを特徴とするカムシャフト測定方
法。1. A linear scale probe is pressed against each of the outer periphery of a cam portion and a journal portion adjacent to a camshaft to measure a step difference between the journal portion and the outer periphery of the cam portion in the same direction. A method for measuring the diameter of a camshaft, comprising measuring the diameter of a journal portion by using the probe pressed against the outer periphery and a diameter measuring probe pressed against the outer periphery of the journal portion from a direction opposite to the probe by 180 °.
カム部の外周の段差とジャーナル部の直径を測定する装
置であって、 カムシャフトの隣接するジャーナル部とカム部の外周の
各々に同一方向から弾圧接触してジャーナル部とカム部
の外周の段差量を測定する測子を有する複数のリニアス
ケールと、各リニアスケールを一体に支持する測定ヘッ
ドと、測定ヘッドをリニアスケールの測子軸方向に移動
可能に保持するヘッド駆動源と、測定ヘッドに相対移動
可能に連結され、カムシャフトのジャーナル部の外周に
押し当てられる段差測定用測子と１８０゜反対方向から
ジャーナル部外周に押し当てられる直径測定用測子を先
端に有する測定アームとを具備し、カムシャフトのジャ
ーナル部とカム部の外周に対応するリニアスケールの測
子を弾圧接触させたまま、ヘッド駆動源で測定ヘッドを
測定アームの測子がジャーナル部に当接する位置まで移
動させて、ジャーナル部とカム部の段差量とジャーナル
部の直径を測定するようにしたことを特徴とするカムシ
ャフト測定装置。2. A device for measuring a step of an outer periphery of a cam portion and an adjacent journal portion of a camshaft and a diameter of the journal portion, wherein the adjacent journal portion of the camshaft and the outer periphery of the cam portion are respectively measured from the same direction. A plurality of linear scales having a gauge to measure the step difference of the outer circumference of the journal and cam sections by contact with the elastic force, a measuring head that integrally supports each linear scale, and a measuring head in the gauge axis direction of the linear scale A head drive source that is movably held, and a diameter that is connected to the measuring head so as to be relatively movable and that is pressed against the outer periphery of the journal portion from a direction 180 ° opposite to the step measuring probe that is pressed against the outer periphery of the journal portion of the camshaft. A measuring arm having a measuring gauge at the tip is provided, and a linear scale gauge corresponding to the journal portion of the cam shaft and the outer periphery of the cam portion is provided. With the head driving source, the measuring head is moved to the position where the gauge head of the measuring arm abuts the journal while keeping the pressure contact, and the step between the journal and the cam and the diameter of the journal are measured. A camshaft measuring device characterized by the above-mentioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26209096A JP3759254B2 (en) | 1996-10-02 | 1996-10-02 | Camshaft measuring method and measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26209096A JP3759254B2 (en) | 1996-10-02 | 1996-10-02 | Camshaft measuring method and measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10111105A true JPH10111105A (en) | 1998-04-28 |
| JP3759254B2 JP3759254B2 (en) | 2006-03-22 |
Family
ID=17370902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26209096A Expired - Lifetime JP3759254B2 (en) | 1996-10-02 | 1996-10-02 | Camshaft measuring method and measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3759254B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100946183B1 (en) | 2008-06-12 | 2010-03-09 | 주식회사 예일하이테크 | Automatic apparatus for measuring the length of Cam shaft |
| JP2010204025A (en) * | 2009-03-05 | 2010-09-16 | Nissan Motor Co Ltd | Apparatus for measuring stem end position and method therefor |
| CN102095392A (en) * | 2010-12-02 | 2011-06-15 | 哈尔滨海太精密量仪有限公司 | Camshaft measurement machine for dynamically measuring specific parameter of camshaft |
| CN106979740A (en) * | 2017-05-23 | 2017-07-25 | 四川银钢通凸轮轴有限公司 | A kind of camshaft journal diameter measuring tool |
| CN107727040A (en) * | 2017-09-04 | 2018-02-23 | 潍柴动力股份有限公司 | The measuring method and device of a kind of valve clearance |
| CN114184253A (en) * | 2021-11-17 | 2022-03-15 | 潍柴动力股份有限公司 | Oil dipstick |
| CN114858036A (en) * | 2021-02-03 | 2022-08-05 | 江西同欣机械制造股份有限公司 | Camshaft semi-manufactured goods phase angle detects anchor clamps |
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1996
- 1996-10-02 JP JP26209096A patent/JP3759254B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100946183B1 (en) | 2008-06-12 | 2010-03-09 | 주식회사 예일하이테크 | Automatic apparatus for measuring the length of Cam shaft |
| JP2010204025A (en) * | 2009-03-05 | 2010-09-16 | Nissan Motor Co Ltd | Apparatus for measuring stem end position and method therefor |
| CN102095392A (en) * | 2010-12-02 | 2011-06-15 | 哈尔滨海太精密量仪有限公司 | Camshaft measurement machine for dynamically measuring specific parameter of camshaft |
| CN106979740A (en) * | 2017-05-23 | 2017-07-25 | 四川银钢通凸轮轴有限公司 | A kind of camshaft journal diameter measuring tool |
| CN107727040A (en) * | 2017-09-04 | 2018-02-23 | 潍柴动力股份有限公司 | The measuring method and device of a kind of valve clearance |
| CN107727040B (en) * | 2017-09-04 | 2019-08-27 | 潍柴动力股份有限公司 | A kind of measurement method and device of valve clearance |
| CN114858036A (en) * | 2021-02-03 | 2022-08-05 | 江西同欣机械制造股份有限公司 | Camshaft semi-manufactured goods phase angle detects anchor clamps |
| CN114184253A (en) * | 2021-11-17 | 2022-03-15 | 潍柴动力股份有限公司 | Oil dipstick |
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| JP3759254B2 (en) | 2006-03-22 |
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