JP2002286697A - Oil check sensor - Google Patents
Oil check sensorInfo
- Publication number
- JP2002286697A JP2002286697A JP2001082956A JP2001082956A JP2002286697A JP 2002286697 A JP2002286697 A JP 2002286697A JP 2001082956 A JP2001082956 A JP 2001082956A JP 2001082956 A JP2001082956 A JP 2001082956A JP 2002286697 A JP2002286697 A JP 2002286697A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- sensor
- housing
- electrodes
- elastic member
- 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.)
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、オイルチェック
センサに関し、特に自動車のトランスミッションなどに
装着され、オイル容器内のオイルの劣化や、オイルで潤
滑される機械部品の摩擦程度などをチェックするため
に、オイル容器に着脱自在に装着されるオイルチエック
センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil check sensor and, more particularly, to an oil check sensor for checking deterioration of oil in an oil container and a degree of friction of a mechanical part lubricated with oil, which is mounted on a transmission of an automobile. And an oil check sensor detachably mounted on an oil container.
【０００２】[0002]
【従来の技術】自動車のトランスミッションオイルやエ
ンジンオイルなどの劣化をチェックし、また、オイルで
潤滑される機械部品の摩擦程度をチェックするために、
オイルパンなどのオイルの注入されるオイル容器にオイ
ルチェックセンサを着脱自在に装着する場合がある。2. Description of the Related Art In order to check the deterioration of transmission oil and engine oil of automobiles, and to check the degree of friction of mechanical parts lubricated with oil,
In some cases, an oil check sensor is detachably mounted on an oil container such as an oil pan into which oil is injected.
【０００３】このようなオイルチェックセンサは、オイ
ル汚れを測定するセンサの継続使用可否がわかるだけで
なく、今後どれだけ使用可能か、また、いつごろオイル
を交換する必要があるかなどを定量的に測定できること
が望まれる。[0003] Such an oil check sensor can not only determine whether or not a sensor for measuring oil contamination can be used continuously, but also determine quantitatively how much it can be used in the future and when it is necessary to change oil. It is hoped that it can be measured at a time.
【０００４】定量的に測定する方法として、たとえば特
開２０００−３２１２４９号公報や、特開２０００−３
２１２４８号公報に記載されたオイルチェックセンサが
ある。[0004] As a method of quantitatively measuring, for example, JP-A-2000-32249 and JP-A-2000-3
There is an oil check sensor described in Japanese Patent No. 21248.
【０００５】特開２０００−３２１２４９号公報に記載
されたオイルチェックセンサは、コイルヘッドへの金属
粉の付着に応じて、励磁回路とヨークとコイルヘッド間
のギャップとで構成される磁気回路に生じる磁束密度の
変化を検出することにより、エンジンオイル中の金属粉
の量を定量的に検出する。[0005] The oil check sensor described in Japanese Patent Application Laid-Open No. 2000-321249 is generated in a magnetic circuit constituted by an excitation circuit and a gap between a yoke and a coil head in accordance with the adhesion of metal powder to the coil head. By detecting a change in magnetic flux density, the amount of metal powder in the engine oil is quantitatively detected.
【０００６】特開２０００−３２１２４８号公報に記載
されたオイルチェックセンサは、励磁電流によって電磁
石化される検出用コイルヘッドに、エンジンオイル中の
金属粉が付着することにより、インダクタンス値に応じ
て振幅が変化する検出信号を発生するものである。[0006] The oil check sensor described in Japanese Patent Application Laid-Open No. 2000-32248 has an amplitude corresponding to an inductance value when metal powder in engine oil adheres to a detection coil head which is formed into an electromagnet by an exciting current. Generates a change detection signal.
【０００７】[0007]
【発明が解決しようとする課題】特開２０００−３２１
２４９号公報に記載されたオイルチェックセンサでは、
検出ヘッドを電磁石化する場合、強い磁力を得るために
は多くの電流を流す必要があり、消費電力が増えるとい
う問題がある。また、磁気検出回路が必要であり、コス
ト高，組込みスペースの確保が必要となる。Problems to be Solved by the Invention JP-A-2000-321
In the oil check sensor described in Japanese Patent Publication No. 249,
When the detection head is formed as an electromagnet, a large amount of current needs to be passed to obtain a strong magnetic force, and there is a problem that power consumption increases. In addition, a magnetic detection circuit is required, so that the cost is high and a space for mounting is required.
【０００８】特開２０００−３２１２４８号公報に記載
されたオイルチェックセンサは、検出ヘッドを電磁石化
する場合、強い磁力を得るためには多くの電流を流す必
要があり、消費電力が増えてしまうという問題がある。
また、検出用交流発生回路が必要となり、部品点数が多
く、コストや省スペースに不利という問題もある。In the oil check sensor described in Japanese Patent Application Laid-Open No. 2000-32248, when an electromagnet is used as the detection head, it is necessary to supply a large amount of current in order to obtain a strong magnetic force, which increases power consumption. There's a problem.
Further, there is a problem that a detection AC generation circuit is required, the number of parts is large, and cost and space saving are disadvantageous.
【０００９】それゆえに、この発明の主たる目的は、小
型で部品点数が少なく、コストが安いオイルチェックセ
ンサを提供することである。[0009] Therefore, a main object of the present invention is to provide an oil check sensor which is small, has a small number of parts, and is inexpensive.
【００１０】[0010]
【課題を解決するための手段】この発明は、棒状体の外
周に絶縁ギャップを介して結合された導電金属性の筒体
を有するセンサ本体を含み、筒体から棒状体の先端部が
突出した先端部外周に磁石を形成し、この磁石の外周に
１対の電極を所定の間隔を隔てて固定し、オイル中に含
まれる鉄粉などの磁性体混合物の量を検出するオイルチ
ェックセンサにおいて、電極の少なくとも一方を抵抗体
にしたことを特徴とする。SUMMARY OF THE INVENTION The present invention includes a sensor body having a conductive metal cylinder connected to an outer periphery of a rod through an insulating gap, and the tip of the rod projects from the cylinder. A magnet is formed on the outer periphery of the tip, and a pair of electrodes is fixed on the outer periphery of the magnet at a predetermined interval, and in an oil check sensor for detecting the amount of a magnetic substance mixture such as iron powder contained in oil, At least one of the electrodes is a resistor.
【００１１】また、抵抗体は、樹脂またはカーボンを混
合したセラミックを含むことを特徴とする。Further, the resistor is characterized by containing a ceramic mixed with a resin or carbon.
【００１２】さらに、オイルが注入されるオイル容器に
先端部が挿入された状態で固定される筒状のハウジング
を含み、センサ本体は、その先端部に導電金属性の筒体
を有し、ハウジング内に前後移動に挿入されることを特
徴とする。The sensor body further includes a cylindrical housing fixed at a state where the tip is inserted into an oil container into which the oil is injected. The sensor body has a conductive metal cylinder at the tip. It is characterized by being inserted into the front and rear movement.
【００１３】さらに、センサ本体をハウジングに対して
常時後方に押圧する第１の弾性部材と、ハウジングの後
端部に前後移動可能に装着された着脱操作部材と、着脱
操作部材をハウジングに対して常時後方または前方に押
圧する第２の弾性部材と、常時はセンサ本体のハウジン
グに対する前後移動をロックし、着脱操作部材を第２の
弾性部材に抗して前方または後方に移動させたときに、
センサ本体のロック状態を解除するロック手段とを含む
ことを特徴とする。Further, a first elastic member which constantly presses the sensor body rearward with respect to the housing, an attaching / detaching operation member attached to the rear end of the housing so as to be movable back and forth, and attaching / detaching the attaching / detaching operation member to the housing. A second elastic member that constantly presses rearward or forward, and always locks the front-back movement of the sensor body with respect to the housing, and when the detachable operation member is moved forward or rearward against the second elastic member,
Locking means for releasing the locked state of the sensor body.
【００１４】さらに、第１の弾性部材とセンサ本体との
間に介装され、ロック状態の解除時に、第１の弾性部材
に押圧されてハウジング内を後方に移動して、ハウジン
グの先端部を閉塞するシール部材を含むことを特徴とす
る。Further, the first elastic member is interposed between the first elastic member and the sensor main body. When the locked state is released, the first elastic member is pressed by the first elastic member to move rearward in the housing, and the distal end of the housing is moved. It is characterized by including a sealing member for closing.
【００１５】[0015]
【発明の実施の形態】図１はこの発明の一実施形態のオ
イルチェックセンサのセンサ本体をハウジングに装着し
た状態を示す断面図であり、図２はハウジングからセン
サ本体を抜き出した状態を示す図であり、図３はオイル
チェックセンサの後端部の拡大断面図であり、（ａ）は
センサをロック状態を示し、（ｂ）はロックを解除した
状態を示す。FIG. 1 is a sectional view showing a state in which a sensor main body of an oil check sensor according to an embodiment of the present invention is mounted on a housing, and FIG. 2 is a view showing a state in which the sensor main body is pulled out of the housing. 3 is an enlarged cross-sectional view of the rear end of the oil check sensor. FIG. 3A shows the locked state of the sensor, and FIG. 3B shows the unlocked state of the sensor.
【００１６】図１に示すように、オイル容器１はたとえ
ば自動車のトランスミッションのオイルパンである。オ
イルチェックセンサ２は、オイル容器１に固定された筒
状のハウジング１０と、ハウジング１０に前後移動可能
に挿入されるセンサ本体２０と、センサ本体２０をハウ
ジング１０に対してワンタッチで着脱するための着脱操
作部材３０を主要な構成要素とされている。オイル容器
１の底部側の側壁に形成された取付孔３にハウジング１
０が螺合され、取付孔３とハウジング１０との間がパッ
キング４でシールされる。As shown in FIG. 1, the oil container 1 is, for example, an oil pan of a transmission of an automobile. The oil check sensor 2 includes a cylindrical housing 10 fixed to the oil container 1, a sensor main body 20 movably inserted in the housing 10, and an oil check sensor 2 for attaching and detaching the sensor main body 20 to and from the housing 10 with one touch. The attachment / detachment operation member 30 is a main component. A housing 1 is provided in a mounting hole 3 formed in a bottom side wall of the oil container 1.
0 is screwed in, and the space between the mounting hole 3 and the housing 10 is sealed with the packing 4.
【００１７】ハウジング１０は、たとえば、オイル容器
１の取付孔３に螺合される外側ハウジング１１と、外側
ハウジング１１の内周に固定される内側ハウジング１２
とを含む。内側ハウジング１２の先端部１０ａは、外側
ハウジング１１から突出して、オイル容器１の内部のオ
イル中に挿入される。このハウジング先端部１０ａは、
側方にオイル出入窓１３を有し、その先端開口が蓋１４
によって閉塞される。また、ハウジング先端部１０ａの
内部に、センサ本体２０の先端部に設けられた磁気ギャ
ップ式センサ部２１が同軸状に挿入され、このセンサ部
２１の先端と蓋１４との間に第１弾性部材として、たと
えばスプリング１５とシール部材１６とが介装される。
スプリング１５は、シール部材１６を介してセンサ本体
２０を常時後方に押圧する。The housing 10 includes, for example, an outer housing 11 screwed into the mounting hole 3 of the oil container 1 and an inner housing 12 fixed to the inner periphery of the outer housing 11.
And The distal end portion 10a of the inner housing 12 protrudes from the outer housing 11 and is inserted into the oil inside the oil container 1. This housing tip 10a
An oil inlet / outlet window 13 is provided on the side, and a front end opening of the
Blocked by A magnetic gap sensor 21 provided at the tip of the sensor main body 20 is coaxially inserted into the housing tip 10a, and a first elastic member is provided between the tip of the sensor 21 and the lid 14. For example, a spring 15 and a seal member 16 are interposed.
The spring 15 always presses the sensor main body 20 backward via the seal member 16.
【００１８】センサ本体２０をハウジング１０に挿入す
るときは、図３（ａ）に示すように、着脱操作部３０を
前方に移動させて、係止ボール３４のテーパ部３０ｃ側
への移動を自由にした状態で行なわれる。すなわち、セ
ンサ本体２０の先端部を係止ボール３４の内側に挿入
し、係止ボール３４が筒体２０ｂの外周に乗り移った時
点で着脱操作部材３０から手を離す。このとき、係止ボ
ール３４がテーパブ３０ｃと係合するので、着脱操作部
材３０から手を放しても、着脱操作部材３０は前方への
移動位置に保持される。When the sensor body 20 is inserted into the housing 10, as shown in FIG. 3 (a), the attachment / detachment operation portion 30 is moved forward to freely move the locking ball 34 toward the tapered portion 30c. It is performed in a state where That is, the tip of the sensor main body 20 is inserted into the inside of the locking ball 34, and the hand is released from the attachment / detachment operation member 30 when the locking ball 34 moves onto the outer periphery of the cylindrical body 20b. At this time, since the locking ball 34 engages with the tapered groove 30c, the detachable operation member 30 is held at the forward movement position even if the user releases the detachable operation member 30.
【００１９】この状態で、センサ本体２０をハウジング
１０に挿通していくと、図２に示すセンサ本体２０の先
端の止めリング２２がシール部材１６に当接し、スプリ
ング１５が圧縮され、シール部材１６が前方に移動して
磁気ギャップセンサー部２１がオイル出入窓１３の近傍
にくる。そして、センサ本体２０の後端部外周の係止溝
３５がハウジング１０の貫通孔３のところに移動した時
点で、係止ボール３４が係止溝３５に落ち込み、着脱操
作部材３０が第２スプリング３１の弾性力で元の位置に
復帰して、センサ本体２０の前後移動がロックされる。In this state, when the sensor body 20 is inserted through the housing 10, the stop ring 22 at the tip of the sensor body 20 shown in FIG. Moves forward, and the magnetic gap sensor unit 21 comes near the oil access window 13. When the locking groove 35 on the outer periphery of the rear end of the sensor body 20 moves to the through hole 3 of the housing 10, the locking ball 34 falls into the locking groove 35, and the detachable operation member 30 is It returns to the original position by the elastic force of 31, and the longitudinal movement of the sensor main body 20 is locked.
【００２０】センサ本体２０は、図２に示すように、た
とえば導電金属製の棒状体２０ａと、棒状体２０ａの外
周に絶縁ギャップＧを介して結合一体化された導電金属
製の筒状体２０ｂとを含む。棒状体２０ａの先端部は筒
状体２０ｂの先端から突出し、この突出した先端部外周
に磁性体として、たとえば永久磁石２３を使用した磁気
ギャップ式センサ部２１が形成される。As shown in FIG. 2, the sensor main body 20 is made of, for example, a conductive metal rod 20a and a conductive metal cylindrical body 20b which is integrally connected to the outer periphery of the rod 20a via an insulating gap G. And The distal end of the rod 20a protrudes from the distal end of the cylindrical body 20b, and a magnetic gap type sensor 21 using a permanent magnet 23 as a magnetic material is formed on the outer periphery of the protruding distal end.
【００２１】図４は図１に示した磁気ギャップ式センサ
の要部断面と周辺回路を示す図である。図４に示すよう
に、棒状体２０ａの先端部外周には、円筒状の永久磁石
２３が固定され、永久磁石２３の外周に筒状の絶縁カバ
ー２４が固定される。そして、絶縁カバー２４の外周に
一対の電極２５，２６が所定の間隔を隔てて固定され、
この一対の電極２５，２６の間にギャップＧが形成され
る。この電極２５，２６の少なくとも一方は、数十Ω〜
数百ｋΩの抵抗体で構成されている。FIG. 4 is a diagram showing a cross section of a main part of the magnetic gap sensor shown in FIG. 1 and a peripheral circuit. As shown in FIG. 4, a cylindrical permanent magnet 23 is fixed to the outer periphery of the distal end portion of the rod 20 a, and a cylindrical insulating cover 24 is fixed to the outer periphery of the permanent magnet 23. Then, a pair of electrodes 25 and 26 are fixed to the outer periphery of the insulating cover 24 at a predetermined interval,
A gap G is formed between the pair of electrodes 25 and 26. At least one of the electrodes 25 and 26 has a resistance of several tens Ω to
It is composed of a resistor of several hundred kΩ.
【００２２】磁気ギャップＧがオイル容器１内のオイル
中に挿入されると、オイル中に含まれる鉄粉などの磁性
体混入物が磁気ギャップＧに磁気吸引されて溜まり、付
着した磁性体混合物を介して電極２５，２６間が電気的
に導通した状態になる。ここで、電極２５，２６はいず
れか一方が抵抗体であるため、鉄粉などの導電体の付着
の度合によって電極２５，２６間の抵抗値は変化する。
すなわち、抵抗体の端面全面に導電体が付着したときに
抵抗値は最小となり、そのときの抵抗値をＲすると、抵
抗体端面のｎ％の表面積に導電体が付着したときの抵抗
値は、（１００／ｎ）×ＲΩとなる。When the magnetic gap G is inserted into the oil in the oil container 1, magnetic substances such as iron powder contained in the oil are magnetically attracted and accumulated in the magnetic gap G, and the adhered magnetic substance mixture is removed. Thus, the electrodes 25 and 26 are electrically connected to each other. Here, since one of the electrodes 25 and 26 is a resistor, the resistance between the electrodes 25 and 26 changes depending on the degree of adhesion of a conductor such as iron powder.
That is, when the conductor adheres to the entire end face of the resistor, the resistance value becomes minimum. When the resistance value at that time is R, the resistance value when the conductor adheres to the surface area of n% of the end face of the resistor is: (100 / n) × RΩ.
【００２３】したがって、電極２５，２６間の導電体の
付着量により、この間の抵抗値は∞からＲまで導電体の
付着量によって変化するので、この間の抵抗値を測定す
ればオイルの汚れ度合を検出できる。Therefore, the resistance value between the electrodes 25 and 26 varies depending on the amount of the conductor attached between the electrodes 25 and 26, and the resistance value between the electrodes 25 and 26 varies depending on the amount of the conductor attached. Can be detected.
【００２４】また、電極２５，２６のいずれか一方を抵
抗体とする代わりに、絶縁カバー２４の外周に抵抗体を
塗布したり、導電性プラスチックまたは導電性セラミク
スを用いても同様に構成できる。Instead of using either one of the electrodes 25 and 26 as a resistor, a similar structure can be obtained by applying a resistor on the outer periphery of the insulating cover 24 or using conductive plastic or conductive ceramics.
【００２５】このオイルチエックセンサ２を用いて、オ
イル容器１内のオイルの劣化や、このオイルによって潤
滑される機械部品の摩擦程度を次のようにしてチェック
する。たとえば、オイル容器１とセンサ本体２０の棒状
体２０ａとの間に、抵抗値Ｒ B＝１Ωを持つ固定抵抗を
介して電源電圧Ｅ＝Ｖ1を印加する。磁気ギャップ式セ
ンサ部２１の磁気ギャップＧに鉄粉などの導電体が磁気
吸引されて溜まると、オイル容器１→ハウジング１０→
筒体２０ｂ→電極２５，２６→棒状体２０ａという経路
で電気回路が構成され、オイルの汚れ度合により導電体
の付着量が増し、電極２５，２６間の抵抗値が∞からＲ
Ωまで下がる。したがって、センサ部分の分圧電圧Ｖ2
を測定すれば、オイルの汚れ度合を検出できる。Using the oil check sensor 2,
The oil in the oil container 1 has deteriorated and
Check the degree of friction of the sliding machine parts as follows
I do. For example, the rod shape of the oil container 1 and the sensor body 20
Resistance R B= 1Ω fixed resistor
Power supply voltage E = V1Is applied. Magnetic gap type
Conductor such as iron powder is magnetic in the magnetic gap G of the sensor part 21.
When collected by suction, the oil container 1 → the housing 10 →
Path from cylinder 20b → electrodes 25 and 26 → rod 20a
Constitutes an electrical circuit, depending on the degree of oil contamination
And the resistance between the electrodes 25 and 26 changes from Δ to R
Down to Ω. Therefore, the divided voltage V of the sensor partTwo
Is measured, the degree of oil contamination can be detected.
【００２６】図５は図３の回路を用いてオイルの汚れ度
合を検出した例を示す図である。この出力例は、ＲB＝
５００Ω、Ｒ＝１００ΩおよびＥ＝５Ｖに設定したとき
の時間の経過と分圧電圧Ｖ2の変化を示している。図５
において、ａはオイルがまだ汚れていない状態を示して
おり、ｂはオイルの汚れが進んでいる状態を示してい
る。オイルが汚れるにしたがって、ｂの傾斜が緩やかに
なっていくので、分圧電圧の変化によりオイルの汚れ状
態を定量的に検出することができる。FIG. 5 is a diagram showing an example in which the degree of oil contamination is detected using the circuit of FIG. In this output example, R B =
500 [Omega, shows a change in the course and the divided voltage V 2 of the time when set to R = 100 [Omega and E = 5V. FIG.
In the figure, a indicates a state in which the oil has not yet been contaminated, and b indicates a state in which the oil has been contaminated. As the oil becomes dirty, the slope of b becomes gentler, so that the dirt state of the oil can be quantitatively detected by a change in the divided voltage.
【００２７】今回開示された実施の形態はすべての点で
例示であって制限的なものではないと考えられるべきで
ある。本発明の範囲は上記した説明ではなくて特許請求
の範囲によって示され、特許請求の範囲と均等の意味お
よび範囲内でのすべての変更が含まれることが意図され
る。The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
【００２８】[0028]
【発明の効果】以上のように、この発明によれば、セン
サ本体の磁性体の外周に電極となる１対の電極を所定の
間隔を隔てて固定し、電極の少なくとも一方を抵抗体で
構成したことにより、オイル中の金属粉が電極間を占め
る面積によって電極間の抵抗値が変化するため、電極間
の抵抗値を測定することにより、オイル中の金属粉の量
を定量的に検出できる。As described above, according to the present invention, a pair of electrodes serving as electrodes are fixed on the outer periphery of the magnetic body of the sensor body at a predetermined interval, and at least one of the electrodes is formed of a resistor. Since the resistance value between the electrodes changes according to the area occupied by the metal powder in the oil between the electrodes, the amount of the metal powder in the oil can be quantitatively detected by measuring the resistance value between the electrodes. .
【図１】 この発明の一実施形態におけるオイルチェッ
クセンサのセンサ本体をハウジングに装着した状態を示
す断面図である。FIG. 1 is a sectional view showing a state where a sensor main body of an oil check sensor according to an embodiment of the present invention is mounted on a housing.
【図２】 ハウジングからセンサ本体を抜き出した状態
を示す図である。FIG. 2 is a diagram illustrating a state where a sensor main body is extracted from a housing.
【図３】 オイルチェックセンサの後端部の拡大断面図
であり、（ａ）はセンサのロック状態を示し、（ｂ）は
ロックを解除した状態を示す。FIGS. 3A and 3B are enlarged cross-sectional views of a rear end portion of an oil check sensor, wherein FIG. 3A shows a locked state of the sensor, and FIG. 3B shows a released state of the lock.
【図４】 図１に示した磁気ギャップ式センサの要部断
面と周辺回路を示す図である。FIG. 4 is a diagram showing a cross section of a main part of the magnetic gap sensor shown in FIG. 1 and peripheral circuits.
【図５】 図３の回路を用いてオイルの汚れ度合を検出
した例を示す図である。FIG. 5 is a diagram showing an example in which the degree of oil contamination is detected using the circuit of FIG. 3;
１ オイル容器、２ オイルチェックセンサ、３ 取付
孔、１０ ハウジング、１１ 外側ハウジング、１２
内側ハウジング、１３ オイル出入窓、１４蓋、１５，
３１スプリング、１６ シール部材、２０ センサ本
体、２０ａ 棒状体、２０ｂ 筒状体、２１ 磁気式ギ
ャップセンサ、２２ リング、２３ 永久磁石、２４
絶縁カバー、２５，２６ 電極、３０ 着脱操作部材、
３０ｃテーパ部、３４ 係止ボール、３５ 係止溝。Reference Signs List 1 oil container, 2 oil check sensor, 3 mounting hole, 10 housing, 11 outer housing, 12
Inner housing, 13 oil access window, 14 lid, 15,
31 spring, 16 seal member, 20 sensor body, 20a rod, 20b tubular, 21 magnetic gap sensor, 22 ring, 23 permanent magnet, 24
Insulating cover, 25, 26 electrodes, 30 detachable operation members,
30c taper portion, 34 locking ball, 35 locking groove.
Claims (5)
合された導電金属性の筒体を有するセンサ本体を含み、
前記筒体から前記棒状体の先端部が突出した先端部外周
に磁石を形成し、前記磁石の外周に１対の電極を所定の
間隔を隔てて固定し、オイル中に含まれる鉄粉などの導
電体混合物の量を検出するオイルチェックセンサにおい
て、 前記電極の少なくとも一方を抵抗体にしたことを特徴と
する、オイルチェックセンサ。1. A sensor body having a conductive metal cylinder coupled to an outer periphery of a rod-shaped body via an insulating gap,
A magnet is formed on the outer periphery of the distal end where the distal end of the rod-shaped body protrudes from the cylindrical body, and a pair of electrodes is fixed on the outer periphery of the magnet at a predetermined interval, such as iron powder contained in oil. An oil check sensor for detecting an amount of a conductor mixture, wherein at least one of the electrodes is a resistor.
合したセラミックを含むことを特徴とする、請求項１に
記載のオイルチェックセンサ。2. The oil check sensor according to claim 1, wherein the resistor includes a ceramic mixed with a resin or carbon.
容器に先端部が挿入された状態で固定される筒状のハウ
ジングを含み、 前記センサ本体は、その先端部に前記導電金属性の筒体
を有し、前記ハウジング内に前後移動に挿入されること
を特徴とする、請求項１に記載のオイルチェックセン
サ。3. A sensor according to claim 1, further comprising a cylindrical housing fixed in a state in which a tip portion is inserted into an oil container into which the oil is poured, wherein the sensor main body is provided at the tip portion with the conductive metal cylinder. The oil check sensor according to claim 1, wherein the oil check sensor is inserted into the housing to move back and forth.
グに対して常時後方に押圧する第１の弾性部材と、 前記ハウジングの後端部に前後移動可能に装着された着
脱操作部材と、 前記着脱操作部材をハウジングに対して常時後方または
前方に押圧する第２の弾性部材と、 常時は前記センサ本体の前記ハウジングに対する前後移
動をロックし、前記着脱操作部材を前記第２の弾性部材
に抗して前方または後方に移動させたときに、前記セン
サ本体の前記ロック状態を解除するロック手段とを含む
ことを特徴とする、請求項３に記載のオイルチェックセ
ンサ。A first elastic member that constantly presses the sensor main body rearward with respect to the housing; a detachable operation member that is attached to a rear end of the housing so as to be movable back and forth; A second elastic member that constantly presses the member rearward or forward with respect to the housing, and always locks forward / backward movement of the sensor main body with respect to the housing, and causes the attaching / detaching operation member to oppose the second elastic member. The oil check sensor according to claim 3, further comprising: a lock unit configured to release the locked state of the sensor main body when the sensor body is moved forward or backward.
サ本体との間に介装され、前記ロック状態の解除時に、
前記第１の弾性部材に押圧されて前記ハウジング内を後
方に移動して、前記ハウジングの先端部を閉塞するシー
ル部材を含むことを特徴とする、請求項４に記載のオイ
ルチェックセンサ。5. The apparatus according to claim 1, further comprising a first elastic member disposed between the first elastic member and the sensor main body.
5. The oil check sensor according to claim 4, further comprising a seal member that is pressed by the first elastic member and moves rearward in the housing to close a front end of the housing. 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001082956A JP3961226B2 (en) | 2001-03-22 | 2001-03-22 | Oil check sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001082956A JP3961226B2 (en) | 2001-03-22 | 2001-03-22 | Oil check sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002286697A true JP2002286697A (en) | 2002-10-03 |
| JP3961226B2 JP3961226B2 (en) | 2007-08-22 |
Family
ID=18938838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001082956A Expired - Fee Related JP3961226B2 (en) | 2001-03-22 | 2001-03-22 | Oil check sensor |
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| Country | Link |
|---|---|
| JP (1) | JP3961226B2 (en) |
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