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JP2006250236A - Abnormality detection device for chain type V pulley continuously variable transmission - Google Patents

Abnormality detection device for chain type V pulley continuously variable transmission Download PDF

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JP2006250236A
JP2006250236A JP2005067253A JP2005067253A JP2006250236A JP 2006250236 A JP2006250236 A JP 2006250236A JP 2005067253 A JP2005067253 A JP 2005067253A JP 2005067253 A JP2005067253 A JP 2005067253A JP 2006250236 A JP2006250236 A JP 2006250236A
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pulley
chain
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continuously variable
sensor
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Noriyasu Oguma
規泰 小熊
Kazuhisa Kitamura
和久 北村
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JTEKT Corp
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JTEKT Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detection device of a chain type V-pulley continuously variable transmission capable of predicting break of power transmission chain. <P>SOLUTION: Pulleys 1, 6 of the chain type V-pulley continuously variable transmission on which the power transmission chain 9 is wrapped around is provided with an AE sensor 10 detecting elastic wave and a transmission part 11a wirelessly transmitting detection signal thereof by electromagnetic induction. A reception part 11b receiving signal wirelessly transmitted from the transmission part 11a and a discriminator discriminating whether elastic wave reaches abnormal level or not based on the signal received by the reception part 11b are provided on a vehicle body side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、チェーン式Ｖ型プーリ無段変速機における動力伝達用チェーンの異常を検出する装置に関する。   The present invention relates to an apparatus for detecting an abnormality of a power transmission chain in a chain type V-type pulley continuously variable transmission.

自動車のＶ型プーリ式無段変速機（ＣＶＴ）では、駆動プーリと従動プーリとの間に無端状動力伝達部材（金属ベルトやチェーン）が掛け渡されており、この無端状動力伝達部材の、各プーリへの巻き付け径を変化させることによって変速制御が行われる。無端状動力伝達部材として金属Ｖベルトを用いた場合には、これが摩耗すると、滑りを生じて変速制御が不能になることもある。そこで、各プーリの回転数を検出して、そこから変速比を求め、変速比が異常値となった回数が所定値に達すると警報を発する装置が提案されている（例えば、特許文献１参照。）。
また、無端状動力伝達部材として金属Ｖベルトを使用し、これを構成する金属ブロックに歪ゲージを貼り込んで、チェーンに作用する力を検知しようとする装置も提案されている（例えば、特許文献２参照。）。 In a V-type pulley type continuously variable transmission (CVT) of an automobile, an endless power transmission member (metal belt or chain) is stretched between a drive pulley and a driven pulley. Shift control is performed by changing the winding diameter of each pulley. When a metal V-belt is used as the endless power transmission member, if it is worn, slippage may occur and shift control may be disabled. Therefore, a device has been proposed in which the number of rotations of each pulley is detected, the gear ratio is obtained therefrom, and an alarm is issued when the number of times the gear ratio becomes an abnormal value reaches a predetermined value (see, for example, Patent Document 1). .)
There has also been proposed a device that uses a metal V-belt as an endless power transmission member and affixes a strain gauge to a metal block constituting the endless power transmission member so as to detect a force acting on the chain (for example, a patent document). 2).

特開昭６２−２０５９号公報JP-A-62-2059 特許第３１２６８１１号公報Japanese Patent No. 3126811

一方、無端状動力伝達部材として、多数のリンクをピンで相互に連結してなるチェーンを用いた場合、リンクやピンの損耗による破断は直ちにチェーンの破断となるため、リンク等の破断予知が重要となる。しかしながら、チェーンの場合には、上記従来技術のように滑りや、これに作用する力を監視していても、チェーン内部の疲労による劣化を的確に検知することはできず、従って、破断予知はできない。
上記のような従来の問題点に鑑み、本発明は動力伝達用チェーンの破断予知が可能な、チェーン式Ｖ型プーリ無段変速機の異常検出装置を提供することを目的とする。 On the other hand, when a chain consisting of many links connected to each other with pins is used as an endless power transmission member, breakage due to wear of links and pins immediately breaks the chain. It becomes. However, in the case of a chain, even if the slip and the force acting on it are monitored as in the above prior art, deterioration due to fatigue inside the chain cannot be accurately detected. Can not.
In view of the above-described conventional problems, an object of the present invention is to provide an abnormality detection device for a chain-type V-type pulley continuously variable transmission capable of predicting breakage of a power transmission chain.

本発明のチェーン式Ｖ型プーリ無段変速機の異常検出装置は、動力伝達用チェーンが掛け渡されるチェーン式Ｖ型プーリ無段変速機のプーリに取り付けられ、弾性波を検出してその検出信号を出力するＡＥ(Acoustic Emission)センサと、前記検出信号に基づいて、前記弾性波が異常レベルに達しているか否かを判別する判別器とを備えたものである。
上記のように構成されたチェーン式Ｖ型プーリ無段変速機の異常検出装置では、動力伝達用チェーンの劣化が進むと、その劣化部分がプーリを通過するとき、正常な状態のときよりも大きな弾性波を生じ、これがプーリを介してＡＥセンサに伝わる。ＡＥセンサは、この弾性波を検出して検出信号を出力する。判別器は検出信号に基づいて弾性波が異常レベルに達しているか否かの判別を行う。 The chain type V-pulley continuously variable transmission abnormality detection device of the present invention is attached to a pulley of a chain-type V-type pulley continuously variable transmission on which a power transmission chain is stretched, detects an elastic wave, and detects its detection signal. AE (Acoustic Emission) sensor that outputs a signal, and a discriminator that determines whether or not the elastic wave has reached an abnormal level based on the detection signal.
In the abnormality detection device for a chain-type V-type pulley continuously variable transmission configured as described above, when the power transmission chain deteriorates, the deteriorated portion passes through the pulley and is larger than in a normal state. An elastic wave is generated and transmitted to the AE sensor via the pulley. The AE sensor detects this elastic wave and outputs a detection signal. The discriminator discriminates whether or not the elastic wave has reached an abnormal level based on the detection signal.

また、本発明のチェーン式Ｖ型プーリ無段変速機の異常検出装置は、動力伝達用チェーンが掛け渡されるチェーン式Ｖ型プーリ無段変速機のプーリに取り付けられ、弾性波を検出してその検出信号を出力するＡＥセンサと、前記ＡＥセンサが取り付けられているプーリに取り付けられ、前記ＡＥセンサの検出信号を無線送信する送信部と、車体側固定部に取り付けられ、前記送信部から無線送信された信号を受信する受信部と、前記受信部が受信した信号に基づいて、前記弾性波が異常レベルに達しているか否かを判別する判別器とを備えたものである。
上記のように構成されたチェーン式Ｖ型プーリ無段変速機の異常検出装置では、動力伝達用チェーンの劣化が進むと、その劣化部分がプーリを通過するとき、正常な状態のときよりも大きな弾性波を生じ、これがプーリを介してＡＥセンサに伝わる。ＡＥセンサは、この弾性波を検出して検出信号を出力する。ＡＥセンサの検出出力は送信部から無線送信され、受信部がこれを受信する。判別器は受信部が受信した信号に基づいて弾性波が異常レベルに達しているか否かの判別を行う。 The abnormality detection device for a chain-type V-type pulley continuously variable transmission according to the present invention is attached to a pulley of a chain-type V-type pulley continuously variable transmission, on which a power transmission chain is stretched, An AE sensor that outputs a detection signal; a transmission unit that is attached to a pulley to which the AE sensor is attached; and that wirelessly transmits the detection signal of the AE sensor; and a wireless unit that is attached to a vehicle body side fixing unit and wirelessly transmits from the transmission unit And a discriminator for discriminating whether or not the elastic wave has reached an abnormal level based on the signal received by the receiving unit.
In the abnormality detection device for a chain-type V-type pulley continuously variable transmission configured as described above, when the power transmission chain deteriorates, the deteriorated portion passes through the pulley and is larger than in a normal state. An elastic wave is generated and transmitted to the AE sensor via the pulley. The AE sensor detects this elastic wave and outputs a detection signal. The detection output of the AE sensor is wirelessly transmitted from the transmission unit, and the reception unit receives this. The discriminator discriminates whether or not the elastic wave has reached an abnormal level based on the signal received by the receiving unit.

また、上記異常検出装置において、送信部及び受信部は互いに近接対向して配置され、電磁誘導による送受信を行うものであることが好ましい。
この場合、電磁誘導による送受信は、電波のように周辺の金属に吸収されたり、潤滑油の影響を受けないので、信号送受信の信頼性が高い。 In the abnormality detection apparatus, it is preferable that the transmission unit and the reception unit are arranged in close proximity to each other and perform transmission and reception by electromagnetic induction.
In this case, transmission / reception by electromagnetic induction is not absorbed by surrounding metal like radio waves or affected by lubricating oil, so that signal transmission / reception is highly reliable.

本発明のチェーン式Ｖ型プーリ無段変速機の異常検出装置によれば、動力伝達用チェーンの劣化部分がプーリを通過するとき生じる弾性波をＡＥセンサによって捉え、その検出出力に基づく判別を行うことにより、動力伝達用チェーンの破断予知を可能とすることができる。   According to the abnormality detection apparatus for a chain type V-type pulley continuously variable transmission of the present invention, an elastic wave generated when a deteriorated portion of a power transmission chain passes through a pulley is captured by an AE sensor, and a determination is made based on the detected output. Thus, it is possible to predict the breakage of the power transmission chain.

図１は、チェーン式Ｖ型プーリ無段変速機の主要部を示す断面図である。図において、駆動プーリ１は、軸方向（図の左右方向）に移動しない固定側プーリ半体１ｓと、軸方向に移動可能な可動側プーリ半体１ｍとによって構成されている。固定側プーリ半体１ｓは、車体側の支持部２及び３により回転自在に支持されている。可動側プーリ半体１ｍは、固定側プーリ半体１ｓに支持され、かつ、これに対して軸方向へ移動可能に支持されている。可動側プーリ半体１ｍの背面側には、シリンダカバー４との間に油室５が形成されており、この油室５に対する油圧制御により可動側プーリ半体１ｍが軸方向に移動する。   FIG. 1 is a cross-sectional view showing the main part of a chain-type V-type pulley continuously variable transmission. In the figure, the drive pulley 1 is composed of a fixed-side pulley half 1s that does not move in the axial direction (left-right direction in the figure) and a movable-side pulley half 1m that can move in the axial direction. The fixed pulley half 1s is rotatably supported by the support portions 2 and 3 on the vehicle body side. The movable pulley half 1m is supported by the fixed pulley half 1s, and is supported so as to be movable in the axial direction. An oil chamber 5 is formed between the movable pulley half 1m and the cylinder cover 4 on the back side of the movable pulley half 1m, and the movable pulley half 1m moves in the axial direction by hydraulic control on the oil chamber 5.

一方、従動プーリ６も同様に、軸方向に移動しない固定側プーリ半体６ｓと、軸方向に移動可能な可動側プーリ半体６ｍとによって構成されている。固定側プーリ半体６ｓは、車体側の支持部２及び３により回転自在に支持されている。可動側プーリ半体６ｍは、固定側プーリ半体６ｓに支持され、かつ、これに対して軸方向へ移動可能に支持されている。可動側プーリ半体６ｍの背面側には、シリンダカバー７との間に油室８が形成されており、この油室８に対する油圧制御により可動側プーリ半体６ｍは軸方向に移動する。   On the other hand, the driven pulley 6 is similarly composed of a fixed pulley half 6s that does not move in the axial direction and a movable pulley half 6m that can move in the axial direction. The stationary pulley half 6s is rotatably supported by the support portions 2 and 3 on the vehicle body side. The movable pulley half 6m is supported by the fixed pulley half 6s and supported so as to be movable in the axial direction. An oil chamber 8 is formed between the movable pulley half 6m and the cylinder cover 7 on the back side of the movable pulley half 6m, and the movable pulley half 6m moves in the axial direction by hydraulic control on the oil chamber 8.

一方、動力伝達用チェーン９は、複数のリンクプレート９ｂを、ロードピン９ａを介して無端状に、かつ、屈曲自在に連結したものである。動力伝達用チェーン９は、上記駆動プーリ１と従動プーリ６との間に掛け渡され、ロードピン９ａの両端面が各プーリ１，６の円錐面に接触する。この接触による摩擦力によって、動力伝達が可能となる。また、油室５，８に対する油圧制御により各プーリ１，６に対する動力伝達用チェーン９の巻き付け径が無段階に変化し、これにより、変速比が無段階に変化する。   On the other hand, the power transmission chain 9 is formed by connecting a plurality of link plates 9b endlessly and flexibly via a load pin 9a. The power transmission chain 9 is stretched between the drive pulley 1 and the driven pulley 6, and both end surfaces of the load pin 9 a are in contact with the conical surfaces of the pulleys 1 and 6. Power can be transmitted by the frictional force generated by this contact. Further, the wrapping diameter of the power transmission chain 9 around the pulleys 1 and 6 is changed steplessly by hydraulic control on the oil chambers 5 and 8, thereby changing the gear ratio steplessly.

次に、上記のように構成されたチェーン式Ｖ型プーリ無段変速機の異常検出装置について説明する。まず、駆動プーリ１のプーリ半体１ｓにおける背面の一箇所には、ＡＥセンサ１０が一部埋め込みの状態で取り付けられている。また、従動プーリ６についても同様に、プーリ半体６ｓにおける背面の一箇所に、ＡＥセンサ１０が一部埋め込みの状態で取り付けられている。プーリ半体１ｓ，６ｓには、リング状の送信部１１ａ（送信コイル）が取り付けられており、これらはそれぞれ、当該プーリ半体１ｓ，６ｓ上のＡＥセンサ１０と電気的に接続されている。また、車体側固定部である支持部２及び３には、送信部１１ａに近接対向して、リング状の受信部１１ｂ（受信コイル）が取り付けられている。送信部１１ａ及び受信部１１ｂは、電磁誘導によって信号を無線送信及び受信する送受信部１１を構成している。従って、各ＡＥセンサ１０は弾性波を検出し、その検出信号は電磁誘導により無線送信及び受信される。電磁誘導による無線送信は、電波のように周辺の金属に吸収されたり、潤滑油の影響（例えば誘電率）を受けないので、信号送受信の信頼性が高い。   Next, an abnormality detection device for the chain type V-type pulley continuously variable transmission configured as described above will be described. First, the AE sensor 10 is attached in a part of the back surface of the pulley half 1 s of the drive pulley 1 in a partially embedded state. Similarly, the driven pulley 6 is also attached with the AE sensor 10 partially embedded at one place on the back surface of the pulley half 6s. Ring-shaped transmitters 11a (transmitting coils) are attached to the pulley halves 1s and 6s, and these are electrically connected to the AE sensors 10 on the pulley halves 1s and 6s, respectively. Further, ring-shaped receiving portions 11b (receiving coils) are attached to the support portions 2 and 3 that are the vehicle body side fixing portions so as to be close to and opposed to the transmitting portion 11a. The transmission unit 11a and the reception unit 11b constitute a transmission / reception unit 11 that wirelessly transmits and receives a signal by electromagnetic induction. Accordingly, each AE sensor 10 detects an elastic wave, and the detection signal is wirelessly transmitted and received by electromagnetic induction. Radio transmission by electromagnetic induction is not absorbed by surrounding metals like radio waves, and is not affected by lubricating oil (for example, dielectric constant), so that signal transmission and reception are highly reliable.

なお、ＡＥセンサ１０の取付形態は上記のような一部埋め込みに限らず、完全埋め込みでもよいし、完全露出でもよい。但し、動力伝達用チェーン９の邪魔にならないように、各プーリ１，６の背面側又は内部に設置されなければならない。なお、駆動プーリ１及び従動プーリ６の各々において、ＡＥセンサ１０の周方向の位置は、同一でもよいし、異なっていてもよい。   Note that the mounting form of the AE sensor 10 is not limited to partial embedding as described above, and may be completely embedded or fully exposed. However, it must be installed on the back side or inside of each pulley 1 and 6 so as not to interfere with the power transmission chain 9. In each of the driving pulley 1 and the driven pulley 6, the circumferential position of the AE sensor 10 may be the same or different.

図２は、異常検出装置の機能構成を示すブロック図である。プーリ側、すなわち、回転体側にはＡＥセンサ１０及び送信部１１ａが設けられている。一方、車体側には、上記受信部１１ｂの他、その出力を増幅する増幅器１２、増幅器の出力に基づいて破断の恐れがある状態か否かを判別する判別器１３、その恐れがあると判別された場合に警報を発する警報器１４、及び、警報器１４の出力信号を取り込む車載ＣＰＵ１５が設けられている。上記ＡＥセンサ１０、送信部１１ａ、受信部１１ｂ、増幅器１２及び判別器１３は、２組設けられている。   FIG. 2 is a block diagram illustrating a functional configuration of the abnormality detection apparatus. An AE sensor 10 and a transmitter 11a are provided on the pulley side, that is, on the rotating body side. On the other hand, on the vehicle body side, in addition to the receiving unit 11b, an amplifier 12 that amplifies the output, a discriminator 13 that discriminates whether or not there is a possibility of breakage based on the output of the amplifier, and discriminates that there is a risk. An alarm device 14 that issues an alarm when it is issued, and an in-vehicle CPU 15 that captures an output signal of the alarm device 14 are provided. Two sets of the AE sensor 10, the transmitter 11a, the receiver 11b, the amplifier 12, and the discriminator 13 are provided.

図３は、動力伝達用チェーンが実際に破断する前（破断するまでの寿命の７０％時点）のＡＥセンサ１０の出力電圧に基づいて増幅器１２から出力される電圧波形を示すグラフである。この電圧波形は、ＡＥセンサ１０に伝わる弾性波の波形に相当するので、以下、縦軸は弾性波の振幅であるとして説明する。動力伝達用チェーン９の劣化が進むと、その劣化部分が各プーリ１，６を通過するとき、正常な状態のときよりも大きな弾性波を生じ、これがプーリ１又は６に伝わる。ＡＥセンサ１０は、プーリ１又は６を介してこの弾性波を検出し、その検出信号が送信部１１ａから受信部１１ｂへ無線送信される。受信部１１ｂの出力は増幅器１２で増幅された後、判別器１３に入力される。判別器１３には、例えば図３に示す所定の閾値Ｖｔｈ（例えば回転ノイズの２〜４倍）が設定されている。判別器１３は、増幅器１２の出力する弾性波の振幅を閾値Ｖｔｈと比較する。 FIG. 3 is a graph showing a voltage waveform output from the amplifier 12 based on the output voltage of the AE sensor 10 before the power transmission chain is actually broken (at the time of 70% of the life until breakage). Since this voltage waveform corresponds to the waveform of the elastic wave transmitted to the AE sensor 10, hereinafter, the vertical axis is described as the amplitude of the elastic wave. When the power transmission chain 9 is further deteriorated, when the deteriorated portion passes through each of the pulleys 1 and 6, an elastic wave larger than that in a normal state is generated, and this is transmitted to the pulley 1 or 6. The AE sensor 10 detects this elastic wave via the pulley 1 or 6, and the detection signal is wirelessly transmitted from the transmission unit 11a to the reception unit 11b. The output of the receiver 11 b is amplified by the amplifier 12 and then input to the discriminator 13. For example, a predetermined threshold V th (for example, 2 to 4 times the rotational noise) shown in FIG. 3 is set in the discriminator 13. The discriminator 13 compares the amplitude of the elastic wave output from the amplifier 12 with the threshold value Vth .

動力伝達用チェーン９の劣化がない（又は少ない）場合には、弾性波の振幅が閾値Ｖｔｈに達することはなく、従って、判別器１３は正常と判別し、警報器１４による警報は出力されない。一方、動力伝達用チェーン９の劣化が進み、破断時期が近づくと、弾性波の振幅が徐々に増大し、閾値Ｖｔｈに達する。これにより、判別器１３は異常と判別し、警報器１４は警報出力を行う。また、車載ＣＰＵ１５は、これを記憶する。
以上のようなＡＥセンサ１０の出力に基づく判別により、動力伝達用チェーン９の破断予知を可能とすることができる。ドライバーは、警報出力が出た時点で、できるだけ早期に修理工場等に車を持ち込み、動力伝達用チェーン９の取替修理を行うことにより、動力伝達用チェーン９の破断を未然に防止することができる。 When there is no deterioration (or little) in the power transmission chain 9, the amplitude of the elastic wave does not reach the threshold value Vth . Therefore, the discriminator 13 determines that it is normal, and no alarm is output from the alarm device 14. . On the other hand, when the power transmission chain 9 deteriorates and the break time approaches, the amplitude of the elastic wave gradually increases and reaches the threshold value Vth . Thereby, the discriminator 13 discriminates that it is abnormal, and the alarm device 14 outputs an alarm. The in-vehicle CPU 15 stores this.
By determining based on the output of the AE sensor 10 as described above, it is possible to predict the breakage of the power transmission chain 9. The driver can prevent the breakage of the power transmission chain 9 by bringing the vehicle to a repair shop or the like as soon as possible when warning output is issued and replacing the power transmission chain 9. it can.

なお、上記実施形態では弾性波の振幅が閾値Ｖｔｈに達したことにより、異常と判別するようにしたが、振幅を時間積分して振動のエネルギーを算出したり、振動の周波数解析も行うことにより、多変量解析を行い、その結果に基づいて異常か否かの判別を行うようにしてもよい。
また、上記実施形態ではＡＥセンサの出力を無線送信したが、周知のスリップリング等を用いて、有線で信号を増幅器１２や判別器１３に出力することも可能ではある。 In the above-described embodiment, an abnormality is detected when the amplitude of the elastic wave reaches the threshold value Vth . However, the amplitude is time-integrated to calculate vibration energy, and vibration frequency analysis is also performed. Thus, multivariate analysis may be performed, and whether or not there is an abnormality may be determined based on the result.
In the above embodiment, the output of the AE sensor is wirelessly transmitted. However, it is also possible to output a signal to the amplifier 12 or the discriminator 13 by wire using a known slip ring or the like.

チェーン式Ｖ型プーリ無段変速機の主要部を示す断面図である。It is sectional drawing which shows the principal part of a chain type V-type pulley continuously variable transmission. 異常検出装置の機能構成を示すブロック図である。It is a block diagram which shows the function structure of an abnormality detection apparatus. 動力伝達用チェーンが実際に破断する前（破断するまでの寿命の７０％時点）のＡＥセンサの出力電圧に基づいて増幅器から出力される電圧波形を示すグラフである。It is a graph which shows the voltage waveform output from an amplifier based on the output voltage of the AE sensor before the chain for power transmission actually breaks (at the time of 70% of the life until breakage).

符号の説明Explanation of symbols

１ 駆動プーリ
３ 支持部（車体側固定部）
６ 従動プーリ
９ 動力伝達用チェーン
１０ ＡＥセンサ
１１ａ 送信部
１１ｂ 受信部
１３ 判別器 1 Drive pulley 3 Support part (vehicle body side fixed part)
6 Driven pulley 9 Power transmission chain 10 AE sensor 11a Transmitter 11b Receiver 13 Discriminator

Claims (3)

動力伝達用チェーンが掛け渡されるチェーン式Ｖ型プーリ無段変速機のプーリに取り付けられ、弾性波を検出してその検出信号を出力するＡＥセンサと、
前記検出信号に基づいて、前記弾性波が異常レベルに達しているか否かを判別する判別器と
を備えたことを特徴とするチェーン式Ｖ型プーリ無段変速機の異常検出装置。 An AE sensor that is attached to a pulley of a chain-type V-type pulley continuously variable transmission on which a power transmission chain is stretched, detects an elastic wave, and outputs a detection signal;
An abnormality detection apparatus for a chain-type V-type pulley continuously variable transmission, comprising: a discriminator that determines whether or not the elastic wave has reached an abnormal level based on the detection signal. 動力伝達用チェーンが掛け渡されるチェーン式Ｖ型プーリ無段変速機のプーリに取り付けられ、弾性波を検出してその検出信号を出力するＡＥセンサと、
前記ＡＥセンサが取り付けられているプーリに取り付けられ、前記ＡＥセンサの検出信号を無線送信する送信部と、
車体側固定部に取り付けられ、前記送信部から無線送信された信号を受信する受信部と、
前記受信部が受信した信号に基づいて、前記弾性波が異常レベルに達しているか否かを判別する判別器と
を備えたことを特徴とするチェーン式Ｖ型プーリ無段変速機の異常検出装置。 An AE sensor that is attached to a pulley of a chain-type V-type pulley continuously variable transmission on which a power transmission chain is stretched, detects an elastic wave, and outputs a detection signal;
A transmitter that is attached to a pulley to which the AE sensor is attached, and that wirelessly transmits a detection signal of the AE sensor;
A receiving unit that is attached to the vehicle body side fixing unit and receives a signal wirelessly transmitted from the transmitting unit;
And a discriminator for discriminating whether or not the elastic wave has reached an abnormal level based on a signal received by the receiver. . 前記送信部及び受信部は互いに近接対向して配置され、電磁誘導による送受信を行うものである請求項２記載のチェーン式Ｖ型プーリ無段変速機の異常検出装置。   3. The abnormality detection device for a chain-type V-type pulley continuously variable transmission according to claim 2, wherein the transmission unit and the reception unit are arranged in close proximity to each other and perform transmission and reception by electromagnetic induction.
JP2005067253A 2005-03-10 2005-03-10 Abnormality detection device for chain type V pulley continuously variable transmission Withdrawn JP2006250236A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9075375B2 (en) 2012-08-31 2015-07-07 Kyocera Document Solutions Inc. Driving device and image forming apparatus provided with same
CN106334726A (en) * 2015-07-07 2017-01-18 日本电产新宝株式会社 Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method
CN108987269A (en) * 2017-06-01 2018-12-11 株式会社迪思科 Processing unit (plant)
US12181040B2 (en) 2022-09-30 2024-12-31 Subaru Corporation Continuously variable transmission

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9075375B2 (en) 2012-08-31 2015-07-07 Kyocera Document Solutions Inc. Driving device and image forming apparatus provided with same
CN106334726A (en) * 2015-07-07 2017-01-18 日本电产新宝株式会社 Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method
US10478887B2 (en) 2015-07-07 2019-11-19 Nidec-Shimpo Corporation Die abnormality prediction system, press machine provided with the same, and die abnormality prediction method
CN108987269A (en) * 2017-06-01 2018-12-11 株式会社迪思科 Processing unit (plant)
JP2018202528A (en) * 2017-06-01 2018-12-27 株式会社ディスコ Processing equipment
US12181040B2 (en) 2022-09-30 2024-12-31 Subaru Corporation Continuously variable transmission

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