JP2007198887A - Apparatus and method for measuring torsional characteristic of tire - Google Patents

Apparatus and method for measuring torsional characteristic of tire Download PDF

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JP2007198887A
JP2007198887A JP2006017349A JP2006017349A JP2007198887A JP 2007198887 A JP2007198887 A JP 2007198887A JP 2006017349 A JP2006017349 A JP 2006017349A JP 2006017349 A JP2006017349 A JP 2006017349A JP 2007198887 A JP2007198887 A JP 2007198887A
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tire
measurement
rotating member
use rotating
rotary shaft
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JP4740752B2 (en
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Katsuji Fukazawa
勝司 深沢
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To measure a characteristic of a tire in a torsional direction defined by the rotary shaft of the tire and a plane surrounding the rotary shaft and passing through the width center of the tire. <P>SOLUTION: The tire 26 is set such that its tread is pressed on a measurement-use rotating member 32 being disposed rotatably. In this situation, the rotary shaft of the tire 26 is on the rotary shaft of the measurement-use rotating member 32 and normal to the rotary shaft of the measurement-use rotating member 32. A hammering shaft 34 of the measurement-use rotating member 32 is hammered horizontally by using a hammer 38 in the tangential direction of the measurement-use rotating member 32, in order to apply torsion to the tire 26. Since the tire 26 is brought to be in a torsional vibration state, acceleration values of the measurement-use rotating member 32 which vibrates in a damped fashion along with the tire 26, are measured by an acceleration sensor 36 until the measurement-use rotating member 32 stops. Measured values are recorded on a recording device in time series, whereby the damping characteristic of vibration in the torsional direction can be obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明はタイヤねじり特性測定装置、及びタイヤねじり特性測定方法に係り、タイヤの回転軸、及びタイヤ幅中心を通る回転軸周りのタイヤのねじり方向の特性、例えば、ねじり方向の振動の減衰を測定可能なタイヤねじり特性測定装置、及びタイヤねじり特性測定方法に関する。   The present invention relates to a tire torsion characteristic measuring apparatus and a tire torsion characteristic measuring method, and measures tire torsion direction characteristics around the rotation axis of the tire and the rotation axis passing through the center of the tire width, for example, damping of vibration in the torsion direction. The present invention relates to a possible tire torsion characteristic measuring apparatus and a tire torsion characteristic measuring method.

従来より、二輪車のシミー現象を改良するために種々の実験検討がなされてきたが、シミー現象を改良するためのタイヤの特性を測定する装置、及び方法がないのが現状であった。   Conventionally, various experimental studies have been made to improve the shimmy phenomenon of a motorcycle, but there is no apparatus and method for measuring tire characteristics for improving the shimmy phenomenon.

なお、タイヤの特性を測定する装置として、例えば特許文献１にはタイヤの縦たわみ方向の減衰を測定する装置が開示されており、特許文献２にはタイヤの周方向のねじりについて測定する装置が開示されている。
特開２００２―７１５３１ 特開２００４―３４０６８８ As an apparatus for measuring tire characteristics, for example, Patent Document 1 discloses an apparatus that measures attenuation in the longitudinal deflection direction of the tire, and Patent Document 2 discloses an apparatus that measures the torsion in the circumferential direction of the tire. It is disclosed.
JP 2002-71531 A JP2004-340688

発明者の種々の実験検討の結果、シミー現象には、タイヤの回転軸、及びタイヤ幅中心を通る回転軸周りのタイヤのねじり方向の減衰が大きく影響していることが分かった。   As a result of various experimental studies by the inventors, it has been found that the shimmy phenomenon is greatly influenced by the attenuation in the torsional direction of the tire around the rotation axis of the tire and the rotation axis passing through the center of the tire width.

本発明は、上記事実を考慮し、タイヤの回転軸、及びタイヤ幅中心を通る回転軸周りのタイヤのねじり方向の振動の減衰を測定可能なタイヤねじり特性測定装置、及びタイヤねじり特性測定方法を提供することが目的である。   In consideration of the above-described facts, the present invention provides a tire torsion characteristic measuring apparatus and a tire torsion characteristic measuring method capable of measuring the damping of vibration in the torsion direction of a tire around the rotation axis of the tire and the rotation axis passing through the center of the tire width. The purpose is to provide.

請求項１に記載のタイヤねじり特性測定装置は、リム組みしたタイヤを取り付けるタイヤ取付軸と、前記タイヤ取付軸、及びタイヤ幅中心を通る回転軸を中心として回転可能に設けられた測定用回転部材と、前記タイヤのトレッドを前記測定用回転部材に押圧するための押圧手段と、前記測定用回転部材の角加速度を検出する角加速度検出手段と、を有することを特徴としている。   The tire torsional characteristic measuring device according to claim 1 is a tire mounting shaft for mounting a rim-assembled tire, and a measurement rotating member provided rotatably about a rotating shaft passing through the tire mounting shaft and a tire width center. And a pressing means for pressing the tread of the tire against the rotating member for measurement, and an angular acceleration detecting means for detecting the angular acceleration of the measuring rotating member.

次に、請求項１に記載のタイヤねじり特性測定装置の作用を説明する。
タイヤのねじり特性を測定するには、先ず、リム組みしたタイヤをタイヤ取付軸に取り付け、押圧手段によってタイヤのトレッドを測定用回転部材に押し付ける。 Next, the operation of the tire torsion characteristic measuring apparatus according to claim 1 will be described.
In order to measure the torsional characteristics of a tire, first, the rim-assembled tire is attached to the tire attachment shaft, and the tread of the tire is pressed against the rotating member for measurement by pressing means.

次に、測定用回転部材に対して回転方向の打撃（または接線方向の打撃）を加える。これにより、タイヤはねじり変形して減衰振動をする。このとき、タイヤに接触して減衰振動している測定用回転部材の角加速度を角加速度検出手段により計測する。なお、計測した角加速度の変動値からタイヤのねじり特性（減衰係数等）を算出することができる。
より正確なねじり特性を測定するためには、測定用回転部材は、回転モーメントを極力小さくすることが好ましく、また、回転時の抵抗も極力小さくすることが好ましい。 Next, an impact in the rotational direction (or impact in the tangential direction) is applied to the rotating member for measurement. As a result, the tire is torsionally deformed and damped. At this time, the angular acceleration of the rotating member for measurement that is in a damped vibration in contact with the tire is measured by the angular acceleration detecting means. Note that the torsional characteristics (attenuation coefficient, etc.) of the tire can be calculated from the measured fluctuation value of the angular acceleration.
In order to measure more accurate torsional characteristics, it is preferable that the rotating member for measurement has the rotational moment as small as possible, and the resistance during rotation is also as small as possible.

請求項２に記載の発明は、請求項１に記載のタイヤねじり特性測定装置において、前記測定用回転部材を回転させるような打撃を前記測定用回転部材に付与するための打撃手段を有する、ことを特徴としている。   The invention according to claim 2 is the tire torsional characteristic measuring device according to claim 1, further comprising striking means for imparting striking to the measuring rotating member so as to rotate the measuring rotating member. It is characterized by.

請求項２に記載のタイヤねじり特性測定装置では、打撃手段により、測定用回転部材に対して測定用回転部材を回転させるような打撃を与えることができる。   In the tire torsion characteristic measuring apparatus according to the second aspect, the striking means can give a striking force that rotates the measuring rotating member relative to the measuring rotating member.

請求項３に記載のタイヤねじり特性測定方法は、リム組みしたタイヤを、タイヤの回転軸、及びタイヤ幅中心を通る回転軸を中心として回転可能に設けられた測定用回転部材に押し付け、前記測定用回転部材に回転方向の打撃を付与して前記測定用回転部材の角加速度を測定する、ことを特徴としている。   The tire torsion characteristic measuring method according to claim 3, wherein the rim-assembled tire is pressed against a rotation member for measurement provided rotatably around a rotation axis of the tire and a rotation axis passing through the center of the tire width. It is characterized in that the angular rotation of the measurement rotary member is measured by applying a blow in the rotational direction to the rotary member for measurement.

請求項３に記載のタイヤねじり特性測定方法では、測定用回転部材にタイヤのトレッドを接触させ、測定用回転部材に対して回転方向の打撃を付与する。これにより、タイヤはねじり変形して減衰振動するので、タイヤに接触して減衰振動している測定用回転部材の角加速度を計測する。このようにして計測した角加速度の変動値からタイヤのねじり特性（減衰係数等）を算出することができる。   In the tire torsion characteristic measuring method according to the third aspect, the tread of the tire is brought into contact with the measurement rotating member, and the rotation in the rotation direction is applied to the measurement rotating member. As a result, the tire is torsionally deformed and damped and vibrated, so that the angular acceleration of the rotating member for measurement that is damped and vibrating in contact with the tire is measured. The torsional characteristics (attenuation coefficient, etc.) of the tire can be calculated from the fluctuation value of the angular acceleration thus measured.

本発明のタイヤねじり特性測定装置、及びタイヤねじり特性測定方法によれば、タイヤの回転軸に対して直交し、かつ接地面に対して直交する軸周りのタイヤのねじり方向の減衰特性を測定できる。   According to the tire torsion characteristic measuring apparatus and the tire torsion characteristic measuring method of the present invention, it is possible to measure the attenuation characteristic in the torsion direction of the tire around an axis that is orthogonal to the tire rotation axis and orthogonal to the ground contact surface. .

以下、添付図面を参照して、本発明の一実施形態に係るタイヤねじり特性測定装置１０について説明する。
図１に示すように、本実施形態のタイヤねじり特性測定装置１０は、床面１２に固定されるベース板１４の上面に、１対の支柱１６を備えている。 Hereinafter, a tire torsion characteristic measuring apparatus 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the tire torsion characteristic measuring apparatus 10 of the present embodiment includes a pair of support columns 16 on the upper surface of a base plate 14 fixed to the floor surface 12.

一対の支柱１６の上端には梁１８が掛け渡されており、梁１８の下面に一対の油圧シリンダ２０が下向きに取り付けられている。
梁１８の下方には、タイヤ支持部材２２が配置されており、このタイヤ支持部材２２の上面に油圧シリンダ２０のピストンロッド２０Ａが固定されている。 A beam 18 is stretched over the upper ends of the pair of columns 16, and a pair of hydraulic cylinders 20 are attached to the lower surface of the beam 18 downward.
A tire support member 22 is disposed below the beam 18, and a piston rod 20 </ b> A of the hydraulic cylinder 20 is fixed to the upper surface of the tire support member 22.

図１、及び図２に示すように、タイヤ支持部材２２は、水平に配置されたタイヤ取付軸２４が回転自在に支持されており、タイヤ取付軸２４の中央部分に、リム組みしたタイヤ２６をボルト（図示せず）で固定可能となっている。   As shown in FIGS. 1 and 2, the tire support member 22 includes a horizontally disposed tire mounting shaft 24 that is rotatably supported. A tire 26 with a rim assembled at a central portion of the tire mounting shaft 24. It can be fixed with a bolt (not shown).

ベース板１４の上面には、一対の支柱１６の中央部分に、後述するタイヤ２６の押圧時の荷重（スラスト荷重）を支持可能なスラストベアリング３０を介して円盤状の測定用回転部材３２が回転自在に支持されている。ここで、測定用回転部材３２、及びスラストベアリング３０は、回転モーメントを極力小さくすることが好ましい。なお、スラストベアリング３０は、例えば、抵抗が少ないボールベアリング等を用いることができるが、他の種類のベアリングを用いても良い。   On the upper surface of the base plate 14, a disk-shaped rotating member for measurement 32 rotates through a thrust bearing 30 capable of supporting a load (thrust load) when the tire 26 is pressed, which will be described later, at the center portion of the pair of support columns 16. It is supported freely. Here, it is preferable that the rotational member 32 for measurement and the thrust bearing 30 have a rotational moment as small as possible. The thrust bearing 30 can be, for example, a ball bearing with low resistance, but other types of bearings may be used.

なお、測定用回転部材３２の回転軸上にタイヤ２６の回転軸（タイヤ取付軸２４の回転軸と同じ）が直角に位置し、かつタイヤ２６の幅方向中心が測定用回転部材３２の回転軸上に位置している。
測定用回転部材３２の外周には、径方向外側へ延びる打撃軸３４が取り付けられている。 The rotation axis of the tire 26 (same as the rotation axis of the tire mounting shaft 24) is positioned on the rotation axis of the measurement rotation member 32 at a right angle, and the center in the width direction of the tire 26 is the rotation axis of the measurement rotation member 32. Located on the top.
A striking shaft 34 extending outward in the radial direction is attached to the outer periphery of the measurement rotating member 32.

また、測定用回転部材３２の上面には、外周の近傍に加速度センサ３６が取り付けられている。加速度センサ３６は、コンピュータ等を含む周知の記録装置（図示せず）に接続されており、加速度が時系列的に記録可能となっている。この加速度センサ３６としては、図示しないが従来周知のものでよく、例えば、共和電業社製の加速度変換器（ＡＳ−２ＧＡ）を使用することができる。   An acceleration sensor 36 is attached to the upper surface of the measurement rotating member 32 in the vicinity of the outer periphery. The acceleration sensor 36 is connected to a known recording device (not shown) including a computer or the like, and acceleration can be recorded in time series. The acceleration sensor 36 may be a conventionally well-known sensor (not shown). For example, an acceleration converter (AS-2GA) manufactured by Kyowa Denki Co., Ltd. can be used.

なお、記録装置では、加速度センサ３６による加速度（測定用回転部材の接線方向）を、角加速度に変換するようになっている。   In the recording device, the acceleration (tangential direction of the measurement rotating member) by the acceleration sensor 36 is converted into angular acceleration.

次に、タイヤねじり特性測定装置１０を用いたタイヤ２６のねじり特性の測定方法について説明する。
先ず、タイヤ取付軸２４にリム組したタイヤ２６、本実施形態ではリム組した二輪車用空気入りタイヤをボルト等で取り付ける。 Next, a method for measuring the torsional characteristics of the tire 26 using the tire torsional characteristic measuring apparatus 10 will be described.
First, a tire 26 rim assembled to the tire mounting shaft 24, in the present embodiment, a rim-assembled pneumatic tire for a motorcycle is attached with a bolt or the like.

次に、油圧シリンダ２０を用いてタイヤ支持部材２２を下方に移動させ、タイヤ２６のトレッドを測定用回転部材３２の上面中央に予め設定した荷重、例えば、実車に装着した際に作用する荷重で押し付ける。これにより、実車同様の荷重がタイヤ２６に負荷された状態を創出することができる。   Next, the tire support member 22 is moved downward using the hydraulic cylinder 20, and a load set in advance at the center of the upper surface of the rotating member 32 for measurement of the tire 26, for example, a load acting when mounted on an actual vehicle. Press. Thereby, it is possible to create a state in which a load similar to that of the actual vehicle is applied to the tire 26.

次に、測定用回転部材３２の打撃軸３４を、ハンマ３８で水平、かつ測定用回転部材３２の接線方向（矢印Ａ方向）に叩く。これにより、固定されているタイヤ２６にねじりが加えられ、タイヤ２６がねじり振動（矢印Ｂ方向）をする。なお、ハンマ３８による打撃は、作業員が行っても良く、バネ等の付勢力を用いても良い。   Next, the striking shaft 34 of the measuring rotary member 32 is hit horizontally with a hammer 38 in the tangential direction (arrow A direction) of the measuring rotary member 32. Thereby, torsion is applied to the fixed tire 26, and the tire 26 vibrates in the torsional direction (arrow B direction). The hammer 38 may be struck by an operator, or an urging force such as a spring may be used.

このとき、タイヤ２６と共に減衰振動する測定用回転部材３２の加速度を、測定用回転部材３２が停止するまで加速度センサ３６により計測し、計測した値を記録装置に時系列的に記録する。なお、タイヤ２６のねじり方向の振動の減衰特性は、記録した値を演算して得ることができる。振動の減衰特性、例えば減衰係数を算出する方法は、周知の方法（例えば、特開２００２−７１５３１号公報等。）を用いれば良い。   At this time, the acceleration of the measurement rotating member 32 that attenuates and vibrates together with the tire 26 is measured by the acceleration sensor 36 until the measurement rotating member 32 stops, and the measured values are recorded in a time series on the recording device. The damping characteristic of the vibration in the torsional direction of the tire 26 can be obtained by calculating a recorded value. A known method (for example, Japanese Patent Application Laid-Open No. 2002-71531) may be used as a method for calculating the vibration attenuation characteristics, for example, the attenuation coefficient.

なお、本実施形態では、測定用回転部材３２の加速度を測定するために加速度センサ３６を用いたが、本発明はこれに限らず、測定用回転部材３２の回転方向の振動を測定可能な手段であればその手段は問わず、例えば、回転方向の角度を精密に測定可能なロータリーエンコーダ等を用いて、時系列的に角度変位を測定しても良い。   In the present embodiment, the acceleration sensor 36 is used to measure the acceleration of the measurement rotary member 32. However, the present invention is not limited to this, and means capable of measuring vibration in the rotation direction of the measurement rotary member 32. If so, the angular displacement may be measured in time series using, for example, a rotary encoder that can accurately measure the angle in the rotation direction.

また、本実施形態では、油圧シリンダ２０を用いてタイヤ２６を測定用回転部材３２に押し付けたが、モーターの駆動力によってタイヤ支持部材２２を移動し、タイヤ２６を測定用回転部材３２に押し付けても良い。   Further, in the present embodiment, the tire 26 is pressed against the measurement rotating member 32 using the hydraulic cylinder 20, but the tire support member 22 is moved by the driving force of the motor, and the tire 26 is pressed against the measurement rotating member 32. Also good.

また、本実施形態では、測定対象のタイヤ２６が二輪車用空気入りタイヤであったが、測定対象は、乗用車用タイヤ等の他の種類のタイヤであっても良い。   In the present embodiment, the measurement target tire 26 is a pneumatic tire for a motorcycle, but the measurement target may be another type of tire such as a passenger tire.

本発明の一実施形態に係るタイヤねじり特性測定装置の正面図である。1 is a front view of a tire torsion characteristic measuring device according to an embodiment of the present invention. 図１に示すタイヤねじり特性測定装置の１−１線断面図である。FIG. 1 is a sectional view taken along line 1-1 of the tire torsion characteristic measuring apparatus shown in FIG. 1.

符号の説明Explanation of symbols

１０ タイヤねじり特性測定装置
１４ ベース板（押圧手段）
１６ 支柱（押圧手段）
１８ 梁（押圧手段）
２０ 油圧シリンダ（押圧手段）
２２ タイヤ支持部材（押圧手段）
２４ タイヤ取付軸（押圧手段）
２６ タイヤ
３０ スラストベアリング
３２ 測定用回転部材
３４ 打撃軸
３６ 加速度センサ（角加速度検出手段）
３８ ハンマ（打撃手段） 10 tire torsion characteristic measuring device 14 base plate (pressing means)
16 Prop (Pressing means)
18 Beam (Pressing means)
20 Hydraulic cylinder (pressing means)
22 Tire support member (pressing means)
24 Tire mounting shaft (pressing means)
26 Tire 30 Thrust bearing 32 Rotating member for measurement 34 Stroke shaft 36 Acceleration sensor (angular acceleration detection means)
38 Hammer

Claims (3)

リム組みしたタイヤを取り付けるタイヤ取付軸と、
前記タイヤ取付軸、及びタイヤ幅中心を通る回転軸を中心として回転可能に設けられた測定用回転部材と、
前記タイヤのトレッドを前記測定用回転部材に押圧するための押圧手段と、
前記測定用回転部材の角加速度を検出する角加速度検出手段と、
を有することを特徴とするタイヤねじり特性測定装置。 A tire mounting shaft for mounting a rim-assembled tire;
A rotation member for measurement provided rotatably about the tire attachment shaft and a rotation axis passing through the center of the tire width;
A pressing means for pressing the tread of the tire against the rotating member for measurement;
Angular acceleration detection means for detecting the angular acceleration of the rotating member for measurement;
A tire torsion characteristic measuring device comprising 前記測定用回転部材を回転させるような打撃を前記測定用回転部材に付与するための打撃手段を有する、ことを特徴とする請求項１に記載のタイヤねじり特性測定装置。 The tire torsion characteristic measuring device according to claim 1, further comprising striking means for imparting a striking force that rotates the measuring rotating member to the measuring rotating member. リム組みしたタイヤを、タイヤの回転軸、及びタイヤ幅中心を通る回転軸を中心として回転可能に設けられた測定用回転部材に押し付け、前記測定用回転部材に回転方向の打撃を付与して前記測定用回転部材の角加速度を測定する、ことを特徴とするタイヤねじり特性測定方法。 The rim-assembled tire is pressed against a rotating member for measurement provided rotatably around a rotating shaft of the tire and a rotating shaft that passes through the center of the tire width, and the rotating member for measurement is given a blow in the rotating direction. A method for measuring tire torsion characteristics, comprising measuring angular acceleration of a rotating member for measurement.
JP2006017349A 2006-01-26 2006-01-26 Tire torsion characteristic measuring apparatus and tire torsion characteristic measuring method Expired - Fee Related JP4740752B2 (en)

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JP2012181072A (en) * 2011-02-28 2012-09-20 Bridgestone Corp Test device and test method for pneumatic tire
CN108072488A (en) * 2016-11-17 2018-05-25 华晨汽车集团控股有限公司 The device and test method of a kind of indirectly testing shafting torsion stiffness and mode

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* Cited by examiner, † Cited by third party
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DE102007051478A1 (en) * 2007-10-27 2009-04-30 Continental Aktiengesellschaft Carcass thread tension measuring method for tire of vehicle, involves receiving acoustic or vibration response signals, evaluating acoustic or vibration response signals, and evaluating tension based on curve path of response signal
JP2012181072A (en) * 2011-02-28 2012-09-20 Bridgestone Corp Test device and test method for pneumatic tire
CN108072488A (en) * 2016-11-17 2018-05-25 华晨汽车集团控股有限公司 The device and test method of a kind of indirectly testing shafting torsion stiffness and mode

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