JP6748001B2 - Tooth contact evaluation method - Google Patents

Tooth contact evaluation method Download PDF

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JP6748001B2
JP6748001B2 JP2017021111A JP2017021111A JP6748001B2 JP 6748001 B2 JP6748001 B2 JP 6748001B2 JP 2017021111 A JP2017021111 A JP 2017021111A JP 2017021111 A JP2017021111 A JP 2017021111A JP 6748001 B2 JP6748001 B2 JP 6748001B2
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pressure
gear
tooth
sensitive portion
contact
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JP2018128335A (en
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光晴 関山
光晴 関山
雅教 石川
雅教 石川
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Toyota Motor Corp
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Description

本発明は歯当たり評価方法に関する。 The present invention relates to a tooth contact evaluation method.

特許文献１には、歯車の歯当たりを評価する方法が開示されている。この方法では、まず、一対の歯車の一方の歯車の歯面に、赤外線サーモグラフィ装置で使用する波長域において基準値以上の吸光度を有するコーティング剤を塗布する。その後、一対の歯車を回転させ、歯車の見かけ上の歯面温度の変化を赤外線サーモグラフィ装置を用いて検出し、検出された見かけ上の歯面温度の変化に基づいて、一対の歯車の歯当たりを評価する。 Patent Document 1 discloses a method for evaluating tooth contact of gears. In this method, first, a coating agent having an absorbance equal to or higher than a reference value in a wavelength range used in an infrared thermography device is applied to a tooth surface of one of a pair of gears. After that, the pair of gears is rotated, the change in the apparent tooth surface temperature of the gears is detected by using an infrared thermography device, and based on the detected change in the apparent tooth surface temperature, the tooth contact of the pair of gears is detected. Evaluate.

特開２００８−１８５５４９号公報JP, 2008-185549, A

特許文献１に開示される方法では、一対の歯車を回転させ、一対の歯車の歯面同士が当たって歯当たりが一旦生じ、当該歯面同士が離れた後に、歯車の歯面温度の変化を検出するものであり、歯当たりが生じたときに歯面へかかる圧力を測定するものではない。したがって、歯当たりの評価精度に改善の余地が有る。 In the method disclosed in Patent Document 1, a pair of gears are rotated, tooth surfaces of the pair of gears come into contact with each other, and tooth contact occurs once, and after the tooth surfaces are separated from each other, a change in tooth surface temperature of the gear is performed. It is to detect, not to measure the pressure applied to the tooth surface when tooth contact occurs. Therefore, there is room for improvement in the evaluation accuracy of tooth contact.

一方、所定の面積を有する膜状圧力センサを歯車の歯面の所定の領域に設けて、歯当たりが生じた箇所と、その圧力の大きさとを計測する方法が知られている。このような方法では、歯車形状に与える影響が大きいため、歯当たりの評価精度に改善の余地が有る。 On the other hand, there is known a method in which a film pressure sensor having a predetermined area is provided in a predetermined region of the tooth surface of a gear to measure a position where tooth contact occurs and the magnitude of the pressure. Such a method has a large effect on the shape of the gear, and thus there is room for improvement in the evaluation accuracy of tooth contact.

本発明は、歯当たりの評価精度を改善するものとする。 The present invention shall improve the accuracy of tooth contact evaluation.

本発明に係る歯当たり評価方法は、
測定対象歯車と別の歯車とを噛み合せて回転させることによって、前記測定対象歯車と前記別の歯車との互いの歯面同士が当たり、接触している部位である同時接触線を評価する歯当たり評価方法であって、
前記測定対象歯車は、第１の感圧部（例えば、感圧領域２ａ等）、及び第２の感圧部（例えば、感圧領域２ｂ等）を備え、
前記第１の感圧部、及び前記第２の感圧部は、前記測定対象歯車の少なくとも一つの歯面に、間隔を空けて配置されており、
前記測定対象歯車と、前記別の歯車とを、噛み合せて回転させ、前記測定対象歯車の回転角度に対する前記第１の感圧部の圧力の検出値を測定した後、前記測定対象歯車の回転角度に対する前記第２の感圧部の圧力の検出値を測定する、圧力実測ステップと、
前記第１の感圧部の長さ及び前記測定対象歯車の回転角度に基づいて、前記別の歯車が前記第１の感圧部を通過した通過速度を算出する、通過速度算出ステップと、
前記同時接触線を算出する同時接触線導出ステップと、を備え、
前記同時接触線導出ステップでは、
前記第１の感圧部が圧力を検知し終わった時点から、前記第２の感圧部が圧力を検知し始めた検知開始時点までにおいて、前記測定対象歯車と前記別の歯車との接触点は、前記第１の感圧部の一端から所定の位置に移動しており、
前記検知開始時点における前記接触点の位置を前記通過速度に基づいて算出することによって、前記同時接触線を算出する。
このような構成によれば、測定対象歯車と別の歯車との歯面同士が当たって歯当たりが生じたときに歯面へかかる圧力を測定する。また、第１の感圧部が歯当たりによる圧力を検知し終わってから、第２の感圧部が歯当たりによる圧力を検知するため、所定の面積を有する膜状圧力センサよりも面積を必要とすることなく、ある時点における歯当たりの部位と、圧力の大きさを良好に計測することができる。そのため、歯当たりの評価精度を改善することができる。 The tooth contact evaluation method according to the present invention,
By rotating the gear to be measured and another gear by meshing with each other, the tooth surfaces of the gear to be measured and the different gear are in contact with each other, and the tooth contact is to evaluate the simultaneous contact line which is the contacting portion. Evaluation method,
The measurement target gear includes a first pressure-sensitive portion (for example, a pressure-sensitive area 2a) and a second pressure-sensitive portion (for example, a pressure-sensitive area 2b).
The first pressure-sensitive portion and the second pressure-sensitive portion are arranged at intervals on at least one tooth surface of the gear to be measured,
The measurement target gear and the other gear are meshed and rotated, and after measuring the detected value of the pressure of the first pressure-sensitive portion with respect to the rotation angle of the measurement target gear, the rotation angle of the measurement target gear A pressure measurement step of measuring the detected value of the pressure of the second pressure sensitive portion with respect to
Based on the length of the first pressure-sensitive portion and the rotation angle of the measurement target gear, the passage speed calculation step of calculating a passage speed at which the another gear has passed through the first pressure-sensitive portion,
Simultaneous contact line deriving step of calculating the simultaneous contact line,
In the step of deriving the simultaneous contact line,
From the time when the first pressure-sensitive portion finishes detecting pressure to the detection start time when the second pressure-sensitive portion begins to detect pressure, the contact point between the gear to be measured and the another gear. Is moving from one end of the first pressure sensitive portion to a predetermined position,
The simultaneous contact line is calculated by calculating the position of the contact point at the time of starting the detection based on the passing speed.
According to such a configuration, the pressure applied to the tooth surface is measured when the tooth surfaces of the gear to be measured and another gear contact each other and tooth contact occurs. Further, since the second pressure-sensitive portion detects the pressure due to the tooth contact after the first pressure-sensitive portion finishes detecting the pressure due to the tooth contact, it requires an area larger than that of the membrane pressure sensor having a predetermined area. It is possible to satisfactorily measure the tooth contact portion and the magnitude of pressure at a certain time point. Therefore, the evaluation accuracy of tooth contact can be improved.

本発明は、歯当たりの評価精度を改善することができる。 The present invention can improve the evaluation accuracy of tooth contact.

実施の形態１に係る歯当たり評価方法を示すフローチャートである。3 is a flowchart showing a tooth contact evaluation method according to the first embodiment. 歯面上に設けられた薄膜圧力センサを示す上面図である。It is a top view which shows the thin film pressure sensor provided on the tooth surface. 歯面上に設けられた薄膜圧力センサを示す断面図である。It is sectional drawing which shows the thin film pressure sensor provided on the tooth surface. 歯面上における歯当たりの進行を示す斜視図である。It is a perspective view which shows progress of tooth contact on a tooth surface. ギヤの回転角度に対する平均面圧の一具体例を示すグラフである。It is a graph which shows one specific example of the average surface pressure with respect to the rotation angle of a gear. 実施の形態１に係る歯当たり評価方法を示す図である。FIG. 3 is a diagram showing a tooth contact evaluation method according to the first embodiment. 実施の形態１に係る歯当たり評価方法を示す図である。FIG. 3 is a diagram showing a tooth contact evaluation method according to the first embodiment. 実施の形態１に係る歯当たり評価方法を示す図である。FIG. 3 is a diagram showing a tooth contact evaluation method according to the first embodiment. 実施の形態１に係る歯当たり評価方法を示す図である。FIG. 3 is a diagram showing a tooth contact evaluation method according to the first embodiment. 歯面上に設けられた薄膜圧力センサの他の一具体例を示す上面図である。It is a top view which shows another specific example of the thin film pressure sensor provided on the tooth surface. ギヤの回転角に対する同時接触線角度の一具体例を示すグラフである。It is a graph which shows a specific example of the simultaneous contact line angle with respect to the rotation angle of a gear. 歯面上に設けられた薄膜圧力センサの一例を示す上面図である。It is a top view which shows an example of the thin film pressure sensor provided on the tooth surface. 歯面上に設けられた薄膜圧力センサの他の一例を示す上面図である。It is a top view which shows another example of the thin film pressure sensor provided on the tooth surface.

以下、本発明を適用した具体的な実施形態について、図面を参照しながら詳細に説明する。ただし、本発明が以下の実施形態に限定される訳ではない。また、説明を明確にするため、以下の記載及び図面は、適宜、簡略化されている。 Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. Further, in order to clarify the explanation, the following description and drawings are appropriately simplified.

（実施の形態１）
図１〜図９を参照して実施の形態１に係る歯当たり評価方法について説明する。図１は、実施の形態１に係る歯当たり評価方法を示すフローチャートである。図２は、歯面上に設けられた薄膜圧力センサを示す上面図である。図３は、歯面上に設けられた薄膜圧力センサを示す断面図である。図４は、歯面上における歯当たりの進行を示す斜視図である。図５は、ギヤの回転角度に対する平均面圧を示すグラフである。図６〜図９は、実施の形態１に係る歯当たり評価方法を示す図である。図２〜図４、図６〜図９では、３次元ｘｙｚ座標を規定した。 (Embodiment 1)
The tooth-contact evaluation method according to the first embodiment will be described with reference to FIGS. 1 to 9. FIG. 1 is a flowchart showing a tooth contact evaluation method according to the first embodiment. FIG. 2 is a top view showing the thin film pressure sensor provided on the tooth surface. FIG. 3 is a sectional view showing a thin film pressure sensor provided on the tooth surface. FIG. 4 is a perspective view showing the progress of tooth contact on the tooth surface. FIG. 5 is a graph showing the average surface pressure with respect to the rotation angle of the gear. 6 to 9 are diagrams showing the tooth-contact evaluation method according to the first embodiment. In FIGS. 2 to 4 and 6 to 9, three-dimensional xyz coordinates are defined.

本歯当たり評価方法は、図２に示す薄膜圧力センサ２を用いて実施することができる。薄膜圧力センサ２は、歯車１０（図４参照）の歯１の歯面１ａに、所定のパターンとして設けられている。薄膜圧力センサ２は、感圧領域２ａ、２ｂ、２ｃと、リード線領域２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉを備える。図２に示す例では、感圧領域２ａ、２ｂ、２ｃは、歯面１ａのピッチ線Ｐ１上に並んで設けられており、いずれも間隔が空いている。さらに、リード線領域２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉが、歯面１ａ上に設けられている。リード線領域２ｄ、２ｅが、感圧領域２ａと電圧検出装置（図示略）とを電気的に接続し、リード線領域２ｆ、２ｇが、感圧領域２ｂと電圧検出装置（図示略）とを電気的に接続し、リード線領域２ｈ、２ｉが、感圧領域２ｃと電圧検出装置（図示略）とを電気的に接続している。感圧領域２ａ、２ｂ、２ｃは、例えば、ピエゾ抵抗素子であり、圧力を受けると、圧力の大きさに応じて、所定の電圧を発生する。感圧領域２ａ、２ｂ、２ｃにそれぞれ接続された電圧検出装置は、発生した電圧を測定することができる。 This tooth contact evaluation method can be implemented using the thin film pressure sensor 2 shown in FIG. The thin film pressure sensor 2 is provided as a predetermined pattern on the tooth surface 1a of the tooth 1 of the gear 10 (see FIG. 4). The thin film pressure sensor 2 includes pressure sensitive areas 2a, 2b, 2c and lead wire areas 2d, 2e, 2f, 2g, 2h, 2i. In the example shown in FIG. 2, the pressure-sensitive areas 2a, 2b, 2c are provided side by side on the pitch line P1 of the tooth flank 1a, and they are all spaced. Further, lead wire regions 2d, 2e, 2f, 2g, 2h, 2i are provided on the tooth surface 1a. The lead wire regions 2d and 2e electrically connect the pressure sensitive region 2a and a voltage detecting device (not shown), and the lead wire regions 2f and 2g connect the pressure sensitive region 2b and a voltage detecting device (not shown). The lead wire regions 2h and 2i are electrically connected to each other, and the pressure sensitive region 2c and the voltage detection device (not shown) are electrically connected to each other. The pressure-sensitive areas 2a, 2b, 2c are, for example, piezoresistive elements, and when pressure is applied, a predetermined voltage is generated according to the magnitude of the pressure. The voltage detection devices respectively connected to the pressure sensitive areas 2a, 2b, 2c can measure the generated voltage.

図３に示すように、薄膜圧力センサ２は、中間膜２１と、絶縁膜２２と、絶縁膜２３と、保護膜２４と、感圧膜２５とを含む。中間膜２１と、絶縁膜２２と、絶縁膜２３と、保護膜２４とは、この順に積層している。保護膜２４は、歯車同士が歯当たりしても、薄膜圧力センサ２の他の構成要素を保護するような耐久性、又は厚みを備えればよい。感圧膜２５は、絶縁膜２２と、絶縁膜２３との間に配置されている。なお、図２に示すように、図３に示す断面は、便宜的にリード線領域２ｆの断面であるが、感圧領域２ａ、２ｂ、２ｃと、リード線領域２ｄ、２ｅ、２ｇ、２ｈ、２ｉにおいても同じ構成を有する。 As shown in FIG. 3, the thin film pressure sensor 2 includes an intermediate film 21, an insulating film 22, an insulating film 23, a protective film 24, and a pressure sensitive film 25. The intermediate film 21, the insulating film 22, the insulating film 23, and the protective film 24 are laminated in this order. The protective film 24 may have a durability or a thickness that protects other components of the thin film pressure sensor 2 even if the gears contact each other. The pressure sensitive film 25 is arranged between the insulating film 22 and the insulating film 23. Note that, as shown in FIG. 2, the cross section shown in FIG. 3 is a cross section of the lead wire region 2f for the sake of convenience, but the pressure sensitive regions 2a, 2b, 2c and the lead wire regions 2d, 2e, 2g, 2h, 2i has the same configuration.

感圧領域２ａ、２ｂ、２ｃにおける感圧膜２５は、リード線領域２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉにおける感圧膜２５の電気抵抗値Ｒ２よりも大きな電気抵抗値Ｒ１を有し、電気抵抗値Ｒ２は、電気抵抗値Ｒ１の５％以下であるとよい。このように電気抵抗値Ｒ１、Ｒ２の比を調整することによって、感圧領域２ａ、２ｂ、２ｃの圧力感度を維持しつつ、リード線領域２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉの圧力感度を十分に低減させる。薄膜圧力センサ２の厚みは、１０μｍ以下であるとよい。中間膜２１、保護膜２４、及び感圧膜２５の厚みの一例は、それぞれ、０．２μｍ、１μｍ、０．２μｍである。絶縁膜２２と絶縁膜２３とを重ねた積層体の厚みの一例は、６μｍである。 The pressure sensitive film 25 in the pressure sensitive regions 2a, 2b, 2c has an electric resistance value R1 larger than the electric resistance value R2 of the pressure sensitive film 25 in the lead wire regions 2d, 2e, 2f, 2g, 2h, 2i, The electric resistance value R2 is preferably 5% or less of the electric resistance value R1. By adjusting the ratio of the electric resistance values R1 and R2 in this way, the pressure sensitivity of the pressure sensitive areas 2a, 2b, 2c is maintained, while the pressure sensitivity of the lead wire areas 2d, 2e, 2f, 2g, 2h, 2i is maintained. Is sufficiently reduced. The thickness of the thin film pressure sensor 2 is preferably 10 μm or less. Examples of the thicknesses of the intermediate film 21, the protective film 24, and the pressure sensitive film 25 are 0.2 μm, 1 μm, and 0.2 μm, respectively. An example of the thickness of the laminated body in which the insulating film 22 and the insulating film 23 are stacked is 6 μm.

まず、歯車１０、１１（図示略）同士を噛み合せて、歯面１ａにかかる圧力を測定する（圧力実測ステップＳ１）。歯車１０、１１は、互いに噛み合せることのできる一対の歯車であり、歯車１０は、歯当たり評価方法の測定対象歯車である。薄膜圧力センサ２を歯車１０の歯１の歯面１ａに配置し、歯車１０を駆動ユニット（図示略）に組み付ける。歯車１１（図示略）は、歯車１０と噛み合う歯車を利用することができる。なお、歯車１１の歯面には、薄膜圧力センサ２が配置されていない。駆動ユニットによって任意の一定のトルク及び、単位時間当たりの回転角度を歯車１０に付与し、噛み合い試験を実施する。 First, the gears 10 and 11 (not shown) are meshed with each other, and the pressure applied to the tooth surface 1a is measured (pressure measurement step S1). The gears 10 and 11 are a pair of gears that can be meshed with each other, and the gear 10 is a measurement target gear of the tooth contact evaluation method. The thin film pressure sensor 2 is arranged on the tooth surface 1a of the tooth 1 of the gear 10, and the gear 10 is assembled to a drive unit (not shown). As the gear 11 (not shown), a gear that meshes with the gear 10 can be used. The thin film pressure sensor 2 is not arranged on the tooth surface of the gear 11. An arbitrary constant torque and a rotation angle per unit time are applied to the gear 10 by the drive unit, and the meshing test is performed.

図４に示すように、同時接触線は、歯車１０、１１同士が噛み合い、歯当たりが進行するとき、時点Ｔ１、Ｔ２、…、Ｔｎにおいて略同時に接触する線、又は線状に延びる領域である。一対の歯車１０、１１同士の噛み合いが開始した後、同時接触線は、時点Ｔ１、Ｔ２、…、Ｔｎと時間が経過するにつれて、噛み合い進行方向に移動する。 As shown in FIG. 4, the simultaneous contact line is a line that is in contact with the gears 10 and 11 at substantially the same time at the time points T1, T2,... .. After the meshing of the pair of gears 10 and 11 is started, the simultaneous contact line moves in the meshing advancing direction as time passes from time points T1, T2,..., Tn.

図５に、感圧領域２ａ、２ｂ、２ｃにより計測した、ギヤの回転角度に対応する平均面圧の一具体例を示す。図５及び図６に示すように、歯車１１（図示略）と感圧領域２ａとの接触が開始する開始地点Ａ１から、歯車１１と感圧領域２ａとの接触が終了する終了地点Ａ２までにおいて、感圧領域２ａは、平均面圧の立ち上がりとその降下とを検出した。また、図５及び図９に示すように、歯車１１と感圧領域２ｂとの接触が開始する開始地点Ｂ１から、歯車１１と感圧領域２ｂとの接触が終了する終了地点Ｂ２までにおいて、感圧領域２ｂは、平均面圧の立ち上がりとその降下とを検出した。図５及び図９に示すように、歯車１１（図示略）と感圧領域２ｃとの接触が開始する開始地点Ｃ１から、歯車１１と感圧領域２ｃとの接触が終了する終了地点Ｃ２までにおいて、感圧領域２ｃは、平均面圧の立ち上がりとその降下とを検出した。なお、開始地点Ｂ１は、感圧領域２ｂが圧力を検知し始めた検知開始時点での、歯車１１と感圧領域２ｂとの接触点の位置でもある。 FIG. 5 shows a specific example of the average surface pressure corresponding to the rotation angle of the gear, which is measured by the pressure sensitive areas 2a, 2b, 2c. As shown in FIGS. 5 and 6, from the start point A1 where the contact between the gear 11 (not shown) and the pressure sensitive area 2a starts to the end point A2 where the contact between the gear 11 and the pressure sensitive area 2a ends. In the pressure sensitive region 2a, the rise and fall of the average surface pressure were detected. Further, as shown in FIGS. 5 and 9, from the start point B1 where the contact between the gear 11 and the pressure sensitive area 2b starts to the end point B2 where the contact between the gear 11 and the pressure sensitive area 2b ends, In the pressure region 2b, the rise and fall of the average surface pressure were detected. As shown in FIGS. 5 and 9, from a start point C1 where the contact between the gear 11 (not shown) and the pressure sensitive area 2c starts to an end point C2 where the contact between the gear 11 and the pressure sensitive area 2c ends. In the pressure sensitive region 2c, the rise and fall of the average surface pressure were detected. The start point B1 is also the position of the contact point between the gear 11 and the pressure-sensitive area 2b at the time when the pressure-sensitive area 2b starts detecting pressure.

続いて、通過速度Ｖを算出する（通過速度算出ステップＳ２）。通過速度Ｖは、同時接触線が感圧領域２ａを通過する速度である。図６に示すように、開始地点Ａ１から終了地点Ａ２までの、歯車１１の回転角度ＲＡ１を計測する。上記したように、駆動ユニットによって任意の一定のトルク及び、単位時間当たりの回転角度を歯車１０に付与し、噛み合い試験を実施する。そのため、歯車１１の回転角度は、経過した時間の長さに比例し得る。通過速度Ｖ［mm/deg］と、回転角度ＲＡ１［deg］と、感圧領域２ａの長さＬ１［mm］とは、関係式１を満たす。式１を用いて、通過速度Ｖを求める。
Ｖ＝Ｌ１／ＲＡ１ …（式１） Subsequently, the passing speed V is calculated (passing speed calculation step S2). The passing speed V is the speed at which the simultaneous contact lines pass through the pressure sensitive area 2a. As shown in FIG. 6, the rotation angle RA1 of the gear 11 from the start point A1 to the end point A2 is measured. As described above, the drive unit applies an arbitrary constant torque and a rotation angle per unit time to the gear 10 to perform the meshing test. Therefore, the rotation angle of the gear 11 can be proportional to the length of time that has elapsed. The passing speed V [mm/deg], the rotation angle RA1 [deg], and the length L1 [mm] of the pressure sensitive area 2a satisfy the relational expression 1. The passing speed V is obtained using the equation 1.
V=L1/RA1 (Formula 1)

最後に、開始地点Ｂ１における同時接触線ＴＢ１を導出する（同時接触線導出ステップＳ３）。具体的には、図５及び図７に示すように、終了地点Ａ２から開始地点Ｂ１までに移動するまでに回転したギヤの回転角度ＲＡ２と、通過速度Ｖとを積算して、移動距離Ｌ２を算出する。さらに、開始地点Ａ１と終了地点Ａ２とを通過し終了地点Ａ２から延長する一直線上において、終了地点Ａ２から延長方向に移動距離Ｌ２だけ移動させた推定点Ａ３を求める。開始地点Ｂ１と、推定点Ａ３とを一直線で結び、同時接触線ＴＢ１を求める。 Finally, the simultaneous contact line T B1 at the start point B1 is derived (simultaneous contact line derivation step S3). Specifically, as shown in FIGS. 5 and 7, the rotation angle RA2 of the gear rotated from the end point A2 to the start point B1 and the passing speed V are integrated to calculate the moving distance L2. calculate. Further, an estimated point A3 obtained by moving the end point A2 by the moving distance L2 in the extension direction is obtained on a straight line passing through the start point A1 and the end point A2 and extending from the end point A2. The starting point B1 and the estimated point A3 are connected by a straight line to obtain a simultaneous contact line T B1 .

図８に示すように、同時接触線ＴＢ１とピッチ線Ｐ１との交点Ｎ１におけるピッチ線Ｐ１の接線ＴＧ１と、同時接触線ＴＢ１との挟角を計測し、同時接触線ＴＢ１の角度α１を算出する。通過速度算出ステップＳ２及び同時接触線導出ステップＳ３と同じ方法を用いて、図９に示すように、歯車１１と感圧領域２ｃとの接触が開始する開始地点Ｃ１を通る同時接触線ＴＣ１を求める。 As shown in FIG. 8, the angle between the tangent line TG1 of the pitch line P1 and the simultaneous contact line T B1 at the intersection N1 between the simultaneous contact line T B1 and the pitch line P1 is measured, and the angle α1 of the simultaneous contact line T B1 is measured. To calculate. Using the same method as the passing speed calculation step S2 and the simultaneous contact line derivation step S3, as shown in FIG. 9, the simultaneous contact line T C1 passing through the start point C1 at which the contact between the gear 11 and the pressure sensitive area 2c starts is calculated. Ask.

（実試験）
次に、図１０及び図１１を参照して、各入力トルク水準における同時接触線の角度を計測した実試験について説明する。図１０は、歯面上に設けられた薄膜圧力センサの他の一具体例を示す上面図である。図１１は、ギヤの回転角に対する同時接触線角度の一具体例を示すグラフである。なお、図１０では、３次元ｘｙｚ座標を規定した。 (Actual test)
Next, an actual test in which the angle of the simultaneous contact line at each input torque level is measured will be described with reference to FIGS. 10 and 11. FIG. 10 is a top view showing another specific example of the thin film pressure sensor provided on the tooth surface. FIG. 11 is a graph showing a specific example of the simultaneous contact line angle with respect to the rotation angle of the gear. In addition, in FIG. 10, three-dimensional xyz coordinates are defined.

実試験の測定対象である歯車１０の歯面１ａに相当する歯面には、薄膜圧力センサ２（図２参照）に相当する薄膜圧力センサが設けられている。また、実試験の測定対象である歯車１０における、この歯面とは別の歯面には、図１０に示す薄膜圧力センサ２０２に相当する薄膜圧力センサが設けられている。 A thin film pressure sensor corresponding to the thin film pressure sensor 2 (see FIG. 2) is provided on the tooth surface corresponding to the tooth surface 1a of the gear 10 that is the measurement target of the actual test. Further, a thin film pressure sensor corresponding to the thin film pressure sensor 202 shown in FIG. 10 is provided on a tooth surface different from the tooth surface of the gear 10 that is the measurement target of the actual test.

図１０に示すように、薄膜圧力センサ２０２は、歯車１０（図４参照）の歯１の歯面１ａに、図２に示す薄膜圧力センサ２のパターンと異なる所定のパターンとして設けられている。薄膜圧力センサ２０２の感圧領域２０２ａ、２０２ｂ、２０２ｃは、それぞれ、図２に示す感圧領域２ａ、２ｂ、２ｃと同じ構成を有する。感圧領域２０２ａ、２０２ｂ、２０２ｃは、それぞれ、図２に示す感圧領域２ａ、２ｂ、２ｃと比較して、歯面１ａ上においてＸ軸マイナス側に設けられている。リード線領域２０２ｄ、２０２ｅ、２０２ｆ、２０２ｇ、２０２ｈ、２０２ｉは、リード線領域２ｄ、２ｅ、２ｆ、２ｇ、２ｈ、２ｉと同じ構成を有する。 As shown in FIG. 10, the thin film pressure sensor 202 is provided on the tooth surface 1a of the tooth 1 of the gear 10 (see FIG. 4) as a predetermined pattern different from the pattern of the thin film pressure sensor 2 shown in FIG. The pressure sensitive regions 202a, 202b, 202c of the thin film pressure sensor 202 have the same configurations as the pressure sensitive regions 2a, 2b, 2c shown in FIG. 2, respectively. The pressure-sensitive areas 202a, 202b, 202c are provided on the negative side of the X-axis on the tooth surface 1a as compared with the pressure-sensitive areas 2a, 2b, 2c shown in FIG. 2, respectively. The lead wire areas 202d, 202e, 202f, 202g, 202h, 202i have the same configuration as the lead wire areas 2d, 2e, 2f, 2g, 2h, 2i.

各入力トルクで、測定対象歯車と別の歯車とを噛み合せ、各感圧領域における同時接触感圧角度を測定し、これを図１１に示した。図１１に示すように、入力トルクの増加に伴って、各感圧領域における同時接触線の角度が変化する。これらの要因として、駆動ユニットのケース、支持系の変形による歯車のアライメント変化、歯面の弾性変形量の増加等が挙げられる。 With each input torque, the gear to be measured is meshed with another gear, and the simultaneous contact pressure-sensitive angle in each pressure-sensitive region was measured, which is shown in FIG. 11. As shown in FIG. 11, the angle of the simultaneous contact line in each pressure-sensitive area changes as the input torque increases. These factors include the case of the drive unit, the alignment change of the gear due to the deformation of the support system, the increase of the elastic deformation amount of the tooth surface, and the like.

以上より、実施の形態１に係る歯当たり評価方法によれば、感圧領域２ａ、２ｂ、２ｃ等によって、歯当たりが生じている間において、ある時点における歯当たりの部位と、各部位の圧力の大きさを良好に計測することができ、歯当たりの評価精度を改善することができる。 As described above, according to the tooth-contact evaluation method according to the first embodiment, the tooth-contact portion at a certain point and the pressure of each portion during the tooth-contact due to the pressure-sensitive areas 2a, 2b, 2c, and the like. Can be satisfactorily measured and the accuracy of tooth contact evaluation can be improved.

なお、本発明は上記実施の形態に限られたものではなく、趣旨を逸脱しない範囲で適宜変更することが可能である。実施の形態１に係る歯当たり評価方法では、薄膜圧力センサ２は、歯車１０（図４参照）の歯１の歯面１ａに、所定のパターンとして設けられており、図２に示す例では、薄膜圧力センサ２の感圧領域２ａ、２ｂ、２ｃは、歯面１ａのピッチ線Ｐ１上に並んで設けられており、いずれも間隔が空いている。しかし、感圧領域２ａ、２ｂ、２ｃは、多種多様な配置パターンをとることができる。例えば、図１２に示すように、感圧領域２ａ、２ｂ、２ｃを歯車１０の歯面１ａの所定の領域、例えば、歯面の長手方向の一端（ここでは、Ｘ軸方向マイナス側の一端）近傍における限定された領域に密に設けてもよい。図１３に示すように、感圧領域２ａ、２ｂ、２ｃ、２ｊ、２ｋ、２ｌ、２ｍ、２ｎ、２ｐ等を歯車１０の歯面１ａのピッチ線Ｐ１上に密に並んで設けてもよい。なお、図１２、１３では、分かり易さのため、リード線領域の図示を省略した。 The present invention is not limited to the above-mentioned embodiments, but can be modified as appropriate without departing from the spirit of the present invention. In the tooth contact evaluation method according to the first embodiment, the thin film pressure sensor 2 is provided on the tooth surface 1a of the tooth 1 of the gear 10 (see FIG. 4) in a predetermined pattern, and in the example shown in FIG. The pressure sensitive areas 2a, 2b, 2c of the thin film pressure sensor 2 are provided side by side on the pitch line P1 of the tooth surface 1a, and are all spaced. However, the pressure-sensitive areas 2a, 2b, 2c can take a wide variety of arrangement patterns. For example, as shown in FIG. 12, the pressure-sensitive areas 2a, 2b, and 2c are defined in a predetermined area of the tooth surface 1a of the gear 10, for example, one end in the longitudinal direction of the tooth surface (here, one end on the minus side in the X-axis direction). They may be densely provided in a limited area in the vicinity. As shown in FIG. 13, the pressure sensitive regions 2a, 2b, 2c, 2j, 2k, 21, 2m, 2n, 2p, etc. may be densely arranged on the pitch line P1 of the tooth surface 1a of the gear 10. 12 and 13, the lead wire region is not shown for the sake of clarity.

Ｓ１ 圧力実測ステップ Ｓ２ 通過速度算出ステップ
Ｓ３ 同時接触線導出ステップ
１０、１１ 歯車
１ 歯 １ａ 歯面
２、２０２ 薄膜圧力センサ
２ａ〜２ｃ、２０２ａ〜２０２ｃ 感圧領域
Ａ１、Ｂ１、Ｃ１ 開始地点 Ａ２、Ｂ２、Ｃ２ 終了地点
Ａ３ 推定点
Ｌ２ 移動距離
ＴＢ１、ＴＣ１ 同時接触線 Ｖ 通過速度 S1 Pressure measurement step S2 Passing speed calculation step S3 Simultaneous contact line derivation step 10, 11 Gear 1 tooth 1a Tooth surface 2, 202 Thin film pressure sensor 2a-2c, 202a-202c Pressure sensitive area A1, B1, C1 Start point A2, B2 , C2 End point A3 Estimated point L2 Moving distance
T B1 , T C1 simultaneous contact line V Passing speed

Claims (1)

測定対象歯車と別の歯車とを噛み合せて回転させることによって、前記測定対象歯車と前記別の歯車との互いの歯面同士が当たり、接触している部位である同時接触線を評価する歯当たり評価方法であって、
前記測定対象歯車は、第１の感圧部、及び第２の感圧部を備え、
前記第１の感圧部、及び前記第２の感圧部は、前記測定対象歯車の少なくとも一つの歯面に、間隔を空けて配置されており、
前記測定対象歯車と、前記別の歯車とを、噛み合せて回転させ、前記測定対象歯車の回転角度に対する前記第１の感圧部の圧力の検出値を測定した後、前記測定対象歯車の回転角度に対する前記第２の感圧部の圧力の検出値を測定する、圧力実測ステップと、
前記第１の感圧部の長さ及び前記測定対象歯車の回転角度に基づいて、前記別の歯車が前記第１の感圧部を通過した通過速度を算出する、通過速度算出ステップと、
前記同時接触線を算出する同時接触線導出ステップと、を備え、
前記同時接触線導出ステップでは、
前記第１の感圧部が圧力を検知し終わった時点から、前記第２の感圧部が圧力を検知し始めた検知開始時点までにおいて、前記測定対象歯車と前記別の歯車との接触点は、前記第１の感圧部の一端から所定の位置に移動しており、
前記検知開始時点における前記接触点の位置を前記通過速度に基づいて算出することによって、前記同時接触線を算出する、
歯当たり評価方法。 By rotating the gear to be measured and another gear by meshing with each other, the tooth surfaces of the gear to be measured and the different gear are in contact with each other, and the tooth contact is to evaluate the simultaneous contact line which is the contacting portion. Evaluation method,
The measurement target gear includes a first pressure sensitive portion and a second pressure sensitive portion,
The first pressure-sensitive portion and the second pressure-sensitive portion are arranged at intervals on at least one tooth surface of the gear to be measured,
The measurement target gear and the other gear are meshed and rotated, and after measuring the detected value of the pressure of the first pressure-sensitive portion with respect to the rotation angle of the measurement target gear, the rotation angle of the measurement target gear A pressure measurement step of measuring the detected value of the pressure of the second pressure sensitive portion with respect to
Based on the length of the first pressure-sensitive portion and the rotation angle of the measurement target gear, the passage speed calculation step of calculating a passage speed at which the another gear has passed through the first pressure-sensitive portion,
Simultaneous contact line deriving step of calculating the simultaneous contact line,
In the step of deriving the simultaneous contact line,
From the time when the first pressure-sensitive portion finishes detecting pressure to the detection start time when the second pressure-sensitive portion begins to detect pressure, the contact point between the gear to be measured and the another gear. Is moving from one end of the first pressure sensitive portion to a predetermined position,
The simultaneous contact line is calculated by calculating the position of the contact point at the time of starting the detection based on the passing speed.
Tooth contact evaluation method.
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JPS5525362B2 (en) * 1973-03-26 1980-07-05
JPS6246228A (en) * 1985-08-24 1987-02-28 Mazda Motor Corp Method of inspecting tooth contact of gear
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JP3399322B2 (en) * 1997-10-14 2003-04-21 トヨタ自動車株式会社 Method and apparatus for measuring gear tooth profile
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