JP2000329687A - Machine and method for friction test - Google Patents
Machine and method for friction testInfo
- Publication number
- JP2000329687A JP2000329687A JP11142281A JP14228199A JP2000329687A JP 2000329687 A JP2000329687 A JP 2000329687A JP 11142281 A JP11142281 A JP 11142281A JP 14228199 A JP14228199 A JP 14228199A JP 2000329687 A JP2000329687 A JP 2000329687A
- Authority
- JP
- Japan
- Prior art keywords
- friction
- drum
- test piece
- holding means
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Tires In General (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ゴム試験片の摩擦
特性を測定する摩擦試験機及びその摩擦試験機を用いた
摩擦試験方法に関し、更に詳しくは、各種スリップ条件
において摩擦係数を正確に測定することを可能にした摩
擦試験機及び摩擦試験方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction tester for measuring a friction characteristic of a rubber test piece and a friction test method using the friction tester. More specifically, the present invention relates to a method for accurately measuring a friction coefficient under various slip conditions. And a friction test method.
【０００２】[0002]
【従来の技術】例えば、空気入りタイヤに用いられるゴ
ムは、実車走行時における摩擦係数を予測するため、試
験片の段階でラボ試験により摩擦係数を調べるようにし
ている。一般に、その試験に使用される摩擦試験機は、
特公昭５３−３４７５２号公報、特開平４−２１５０３
８号公報、特開昭６０−１４９９４６号公報に示すよう
に、回転可能に構成した治具に試験片を固定し、該試験
片を回転させながら路面に押しつけるか、或いは回転す
るドラムの摩擦面に対して、固定された試験片を押し付
けて摩擦係数を測定するようになっている。そのため、
スリップ率が一定の摩擦係数しか得ることができず、ス
リップ率を０〜１００％まで変化させた時の摩擦係数−
スリップ率の関係を求めることができなかった。2. Description of the Related Art For example, a rubber used for a pneumatic tire is examined for a friction coefficient by a laboratory test at a stage of a test piece in order to predict a friction coefficient when the vehicle runs. Generally, the friction tester used for the test is
JP-B-53-34752, JP-A-4-21503
No. 8, JP-A-60-149946, a test piece is fixed to a rotatable jig and pressed against a road surface while rotating the test piece, or a friction surface of a rotating drum. , A fixed test piece is pressed to measure the coefficient of friction. for that reason,
A coefficient of friction when the slip ratio can only obtain a constant friction coefficient and the slip ratio is changed from 0 to 100%-
The relationship of the slip ratio could not be determined.
【０００３】一方、特開平１−２９２２３２号公報に
は、回転可能なドラムの外周面に設けられた摩擦面上
で、回転可能な試験片をスリップ率が変化するように回
転速度を変化させながらドラム軸方向に移動させること
により摩擦特性を測定する試験機が開示されている。し
かしながら、上記試験機では測定時に試験片をドラム上
で軸方向に移動させるためゴム試験片に対して横力が発
生し、正確な摩擦係数を測定できないという問題があっ
た。On the other hand, Japanese Patent Application Laid-Open No. 1-292232 discloses that a rotatable test piece is rotated on a friction surface provided on the outer peripheral surface of a rotatable drum while changing the rotation speed so that the slip ratio changes. A tester that measures friction characteristics by moving the drum in the axial direction is disclosed. However, in the above-described testing machine, a lateral force is generated on the rubber test piece because the test piece is moved in the axial direction on the drum at the time of measurement, and thus there is a problem that an accurate coefficient of friction cannot be measured.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、任意
のスリップ条件を設定可能であると共に、そのスリップ
条件において摩擦係数を正確に測定することを可能にし
た摩擦試験機及び摩擦試験方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a friction tester and a friction test method capable of setting arbitrary slip conditions and accurately measuring a friction coefficient under the slip conditions. To provide.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成する本発
明の摩擦試験機は、外周面に摩擦面を設けたドラムの回
転軸と、前記摩擦面に接しながら回転走行する円板状の
試験片を保持する保持手段の回転軸とを互いに平行に配
置し、前記ドラム及び保持手段の回転速度をそれぞれ制
御自在に構成すると共に、前記保持手段に加わるトルク
を測定するトルク測定手段と、前記試験片に荷重を負荷
する荷重負荷手段と、その荷重を検出する荷重検出手段
とを設け、少なくとも摩擦試験時には前記保持手段の位
置を軸方向に固定するようにしたことを特徴とするもの
である。A friction tester according to the present invention, which achieves the above-mentioned object, comprises a disk-shaped tester which rotates with a rotating shaft of a drum provided with a friction surface on an outer peripheral surface while contacting the friction surface. A rotation axis of the holding means for holding the piece is arranged in parallel with each other, the rotation speeds of the drum and the holding means are configured to be controllable, and a torque measuring means for measuring a torque applied to the holding means; A load applying means for applying a load to the piece and a load detecting means for detecting the load are provided, and at least at the time of a friction test, the position of the holding means is fixed in the axial direction.
【０００６】このように試験片の保持手段及びドラムの
回転速度をそれぞれ制御自在に構成することにより、ド
ラムの表面速度と前記試験片の表面速度との速度比に基
づいて任意のスリップ条件を設定し、そのスリップ条件
において試験片の摩擦係数を測定することができる。ま
た、少なくとも摩擦試験時には保持手段の位置を軸方向
に固定するので、試験時に試験片が横力を受けることな
く摩擦係数−スリップ率の関係を正確に求めることがで
きる。[0006] By thus arranging the test piece holding means and the rotation speed of the drum so as to be freely controllable, an arbitrary slip condition can be set based on the speed ratio between the surface speed of the drum and the surface speed of the test piece. Then, the friction coefficient of the test piece can be measured under the slip condition. Further, since the position of the holding means is fixed in the axial direction at least at the time of the friction test, the relationship between the friction coefficient and the slip ratio can be accurately obtained without the test piece receiving a lateral force at the time of the test.
【０００７】本発明において、ドラムの外周面の直径は
試験片の直径の５倍以上にすることが好ましい。このよ
うにドラムを試験片に比べて相対的に大きくすることに
より、上述のように摩擦試験時に保持手段の位置を軸方
向に固定した場合であっても、摩擦面に油やゴム屑の付
着による状態変化を生じる前に摩擦試験を完了すること
が可能になる。また、ドラムの外周面に試験片が走行す
る複数のレーンを有する摩擦面を設け、試験片をレーン
毎に移動可能に構成すれば、レーンを変更するだけで試
験片の摩擦試験を連続して行うことができる。In the present invention, the diameter of the outer peripheral surface of the drum is preferably at least five times the diameter of the test piece. By making the drum relatively larger than the test piece in this way, even if the position of the holding means is fixed in the axial direction during the friction test as described above, oil or rubber debris adheres to the friction surface. It is possible to complete the friction test before a state change occurs due to the above. Further, if a friction surface having a plurality of lanes on which the test piece travels is provided on the outer peripheral surface of the drum and the test piece is configured to be movable for each lane, the friction test of the test piece can be continuously performed only by changing the lane. It can be carried out.
【０００８】本発明では、ドラムの上方に保持手段を配
置し、ドラムの軸方向に平行移動可能な移動体上に支持
壁を立設し、該支持壁に沿って上下方向に進退自在な昇
降体を配設し、該昇降体に保持手段とトルク測定手段を
介して保持手段を駆動する駆動モータとを搭載すると共
に、支持壁に試験片に対する負荷荷重を相殺する荷重均
衡手段を設け、かつ昇降体に荷重負荷手段を設置し、該
荷重負荷手段が荷重検出手段を介して保持手段に荷重を
負荷することが好ましい。According to the present invention, the holding means is arranged above the drum, the support wall is erected on a movable body which can move in parallel in the axial direction of the drum, and the vertically movable vertically movable along the support wall. A body is provided, and a driving motor for driving the holding means via the holding means and the torque measuring means is mounted on the elevating body, and a load balancing means for canceling a load applied to the test piece is provided on the support wall, and It is preferable that a load applying means is installed on the elevating body, and the load applying means applies a load to the holding means via the load detecting means.
【０００９】このように保持手段及びその駆動モータ等
を搭載する昇降体を上下方向に進退自在に構成すること
により、試験片の大きさが種々異なる場合であっても、
ドラムの回転軸と保持手段の回転軸との平行状態を維持
し、測定条件を一定にすることができる。また、支持壁
に試験片に対する負荷荷重を相殺する荷重均衡手段を設
けることにより、荷重負荷手段から与えられる荷重を荷
重検出手段により正確に測定することができる。In this way, by configuring the lifting / lowering body on which the holding means and its driving motor and the like are mounted so as to be able to move up and down in the vertical direction, even if the size of the test piece is variously different,
It is possible to maintain a parallel state between the rotation axis of the drum and the rotation axis of the holding means, and to keep the measurement conditions constant. Further, by providing a load balancing means for canceling the load applied to the test piece on the support wall, the load applied from the load applying means can be accurately measured by the load detecting means.
【００１０】また、ドラムの上方に水張りトレイを介し
て保持手段を配置し、該水張りトレイの底部に開口部を
形成し、該開口部を介してドラムの摩擦面と保持手段に
保持された試験片が当接する構成にし、水張りトレイに
水を供給する給水部を設けると共に、該水張りトレイの
開口部とドラムの摩擦面との隙間から水張りトレイに張
られた水を排出するように構成しても良い。この水張り
トレイを設けることにより、ウェット条件での摩擦係数
を測定することが可能になる。この場合、給水部の供給
水量を調整可能にすると共に、水張りトレイの開口部と
ドラムの摩擦面との隙間を調整可能にすると良い。ま
た、給水部に水温調節可能な水供給源を接続すると良
い。A holding means is disposed above the drum via a water-filled tray, an opening is formed at the bottom of the water-filled tray, and the frictional surface of the drum and the test held by the holding means via the opening. The pieces are in contact with each other, and a water supply unit for supplying water to the water-filled tray is provided, and the water stretched on the water-filled tray is discharged from a gap between the opening of the water-filled tray and the friction surface of the drum. Is also good. By providing the water-filled tray, it is possible to measure the friction coefficient under wet conditions. In this case, it is preferable that the amount of water supplied from the water supply unit can be adjusted, and the gap between the opening of the water filling tray and the friction surface of the drum can be adjusted. Further, it is preferable to connect a water supply source capable of adjusting the water temperature to the water supply unit.
【００１１】更に、保持手段を恒温槽内に設置し、該恒
温槽に温度調整されたエアを供給可能にしても良い。こ
の恒温槽を設けることにより、温度条件を正確に設定す
ることが可能になる。Further, the holding means may be installed in a thermostat so that the temperature-controlled air can be supplied to the thermostat. By providing this constant temperature bath, it is possible to set temperature conditions accurately.
【００１２】一方、本発明の摩擦試験方法は、上述した
摩擦試験機を使用し、ドラムの表面速度と試験片の表面
速度との速度差に基づいて任意のスリップ条件を設定す
ると共に、そのスリップ条件における摩擦係数を測定す
ることを特徴とするものである。On the other hand, the friction test method of the present invention uses the above-described friction tester, sets arbitrary slip conditions based on the speed difference between the surface speed of the drum and the surface speed of the test piece, and sets the slip condition. It is characterized in that the friction coefficient under the condition is measured.
【００１３】より具体的には、ドラムを一定の回転速度
に保持する一方で、保持手段を試験片の表面速度とドラ
ムの表面速度とを等速にする回転速度から停止状態まで
減速し、スリップ率０〜１００％の範囲でタイヤ制動時
のスリップ条件を再現したり、ドラムを一定の回転速度
に保持する一方で、保持手段を試験片の表面速度とドラ
ムの表面速度とを等速にする回転速度を上限として繰り
返し加減速し、スリップ率０〜１００％の任意の範囲で
タイヤ間欠制動時（ＡＢＳ制動時）のスリップ条件を再
現したり、ドラムを特定の回転速度から減速する一方
で、保持手段を試験片の表面速度とドラムの表面速度と
を等速にする回転速度を上限として繰り返し加減速し、
スリップ率０〜１００％の任意の範囲でタイヤ間欠制動
時（実車により近いＡＢＳ制動時）のスリップ条件を再
現したり、或いはドラムを停止状態に保持する一方で、
保持手段を停止状態から回転駆動し、タイヤ発進時のス
リップ条件を再現し、これらスリップ条件において摩擦
係数を正確に測定することできる。More specifically, while the drum is held at a constant rotation speed, the holding means is decelerated from a rotation speed at which the surface speed of the test piece and the drum surface speed are made equal to a stopped state, Slip conditions during tire braking are reproduced in the range of 0 to 100%, and the drum is held at a constant rotational speed, while the holding means is used to make the surface speed of the test piece equal to the surface speed of the drum. While accelerating and decelerating repeatedly with the rotation speed as an upper limit, the slip condition at the time of intermittent tire braking (at the time of ABS braking) is reproduced in an arbitrary range of a slip ratio of 0 to 100%, while the drum is decelerated from a specific rotation speed, The holding means repeatedly accelerates and decelerates up to a rotation speed at which the surface speed of the test piece and the surface speed of the drum are made equal,
While reproducing the slip condition at the time of intermittent braking of the tire (at the time of ABS braking closer to the actual vehicle) in an arbitrary range of the slip ratio 0 to 100%, or keeping the drum in a stopped state,
By rotating the holding means from the stopped state, the slip conditions at the time of starting the tire can be reproduced, and the friction coefficient can be accurately measured under these slip conditions.
【００１４】[0014]
【発明の実施の形態】以下、本発明の構成について添付
の図面を参照しながら詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.
【００１５】図１〜図４は本発明の摩擦試験機の一例を
示し、ケーシング１内に立設された支持フレーム２の中
間部に前後方向（図２の左右方向）に水平に延びるドラ
ム回転軸３が回転自在に支持され、そのドラム回転軸３
の先端部にドラム４が設けられている。ドラム回転軸３
の後方の支持フレーム２上には、ドラム用の過負荷保護
装置５と減速機６とが設置されている。減速機６に隣接
して設置されたブレーキ機能を具備する駆動モータ７と
減速機６とがベルト８を介して接続され、駆動モータ７
の作動により、減速機６、過負荷保護装置５、ドラム回
転軸３を介して、ドラム４が回転可能になっている。ま
た、駆動モータ７にブレーキをかけた状態にすれば、ド
ラム４の回転を停止させることができる。ドラム４の制
動手段は、特に限定されるものではなく、上記のように
駆動モータ７にブレーキ機能を付加する以外に、ドラム
回転軸３やドラム４にブレーキを付加しても良い。FIGS. 1 to 4 show an example of a friction tester according to the present invention, in which a drum rotating horizontally in the front-rear direction (left-right direction in FIG. 2) is provided at an intermediate portion of a support frame 2 erected in a casing 1. The shaft 3 is rotatably supported, and the drum rotation shaft 3
The drum 4 is provided at the tip of the. Drum rotating shaft 3
The overload protection device 5 for a drum and the reduction gear 6 are installed on the support frame 2 behind. A drive motor 7 having a brake function and installed adjacent to the speed reducer 6 is connected to the speed reducer 6 via a belt 8.
, The drum 4 can be rotated via the reduction gear 6, the overload protection device 5, and the drum rotation shaft 3. If the drive motor 7 is braked, the rotation of the drum 4 can be stopped. The braking means for the drum 4 is not particularly limited, and a brake may be added to the drum rotating shaft 3 or the drum 4 in addition to the above-described brake function added to the drive motor 7.
【００１６】ドラム４の外周面４ａには、エメリーペー
パー等の研摩紙４ｂが着脱自在に張りつけられ、摩擦面
４ｃを形成するようにしてある（図３）。ドラム４の前
後幅が幅広に形成され、外周面４ａにはゴム試験片Ｘが
走行する複数（例えば１０）のレーンを持つ摩擦面４ｃ
が形成できるようになっている。このように複数のレー
ンを有する摩擦面４ｃの形成により、研摩紙を張り替え
ることなく試験を連続して行うことができ、またゴム試
験片Ｘの予備ずり（モールド表面に付いている油がゴム
試験片に付着した際に、本試験前にゴム試験片Ｘを摩擦
面４ｃ上を転動させてその油を除去するなど）にも用い
ることができる。An abrasive paper 4b such as emery paper is detachably attached to the outer peripheral surface 4a of the drum 4 to form a friction surface 4c (FIG. 3). A friction surface 4c having a plurality of (for example, 10) lanes on which a rubber test piece X runs is formed on an outer peripheral surface 4a of the drum 4 so that the front-rear width of the drum 4 is wide.
Can be formed. By forming the friction surface 4c having a plurality of lanes in this manner, the test can be performed continuously without re-polishing the abrasive paper, and the preliminary shearing of the rubber test piece X (the oil on the mold surface is Before adhering to the test piece, the rubber test piece X can be rolled on the friction surface 4c to remove the oil before the main test).
【００１７】支持フレーム２の上端部に横設された水平
板９上には、前後に延びるガイドレール１０が固設さ
れ、このガイドレール１０に板状の移動体１１が摺動自
在に係合している。移動体１１の一側方の水平板９上に
ガイドレール１０と平行に延びるボールネジ１２が配設
され、このボールネジ１２に移動体１１の一側に突設さ
れた係合部１１ａが螺合している。ボールネジ１２の後
端に連結されたモータ１２ａの駆動により、ボールネジ
１２が回転すると、移動体１１がガイドレール１０に沿
って前後にドラム４の軸方向（ドラム回転軸３の延在す
る方向）と平行に移動するようになっている。A guide rail 10 extending forward and backward is fixed on a horizontal plate 9 laid laterally on the upper end of the support frame 2, and a plate-shaped moving body 11 is slidably engaged with the guide rail 10. are doing. A ball screw 12 extending in parallel with the guide rail 10 is provided on the horizontal plate 9 on one side of the moving body 11, and an engaging portion 11 a protruding from one side of the moving body 11 is screwed into the ball screw 12. ing. When the ball screw 12 is rotated by the drive of the motor 12a connected to the rear end of the ball screw 12, the moving body 11 moves back and forth along the guide rail 10 in the axial direction of the drum 4 (the direction in which the drum rotating shaft 3 extends). It moves in parallel.
【００１８】移動体１１の一側部には、前後（ドラム４
の軸方向）に延びる支持壁１３が垂直に立設されてい
る。支持壁１３の側面には、上下に延びるガイド部材１
４が前後２か所に固定され、これらガイド部材１４，１
４に板状の昇降体１５が上下に摺動自在に係合してい
る。昇降体１５の側部に突設された前後のブラケット１
６，１７には、トルクメータ（トルク測定手段）１８と
ブレーキ機能を具備した駆動モータ１９が取り付けられ
ている。この駆動モータ１９は回転速度が制御自在に構
成されている。駆動モータ１９の回転軸１９ａにカップ
リングＺとクラッチ２０を介してトルクメータ１８の後
部回転軸１８ａが接続され、このトルクメータ１８の前
部回転軸１８ｂに円板状のゴム試験片Ｘを保持する保持
手段２１の回転軸２２が接続されている。この保持手段
２１は移動体１１の移動に伴ってドラム４の軸方向に往
復移動可能であるが、少なくとも摩擦試験時にはドラム
４に対する相対的位置を軸方向に固定するようになって
いる。One side of the moving body 11 is moved forward and backward (drum 4
The support wall 13 extending in the axial direction) is vertically erected. A guide member 1 extending vertically is provided on a side surface of the support wall 13.
4 are fixed at two places in front and back, and these guide members 14 and 1 are fixed.
4, a plate-like elevating body 15 is slidably engaged with the upper and lower parts. Front and rear brackets 1 protruding from the side of the elevating body 15
A torque meter (torque measuring means) 18 and a drive motor 19 having a brake function are attached to 6, 6 and 17, respectively. The drive motor 19 is configured so that the rotation speed can be freely controlled. A rear rotation shaft 18a of the torque meter 18 is connected to a rotation shaft 19a of the drive motor 19 via a coupling Z and a clutch 20, and a disk-shaped rubber test piece X is held on the front rotation shaft 18b of the torque meter 18. The rotating shaft 22 of the holding means 21 is connected. The holding means 21 can reciprocate in the axial direction of the drum 4 with the movement of the moving body 11, but at least at the time of a friction test, the relative position with respect to the drum 4 is fixed in the axial direction.
【００１９】保持手段２１は、図５に示すように、横設
された円筒体２３内に軸受２４を介して支持された回転
軸２２の先端部２２ａにゴム試験片Ｘを着脱自在に保持
可能な保持部２５を備えている。この保持部２５は、回
転軸２２の先端部２２ａに嵌着された保持軸２６と、保
持軸２６の後端に突設されたフランジ２７と、保持軸２
６に嵌合する芯金２８と、芯金２８を押さえる押さえフ
ランジ２９及び押さえキャップ３１とを備えている。As shown in FIG. 5, the holding means 21 is capable of detachably holding the rubber test piece X at the tip end 22a of a rotating shaft 22 supported via a bearing 24 in a horizontally disposed cylindrical body 23. The holding section 25 is provided. The holding portion 25 includes a holding shaft 26 fitted to the front end portion 22 a of the rotating shaft 22, a flange 27 protruding from a rear end of the holding shaft 26, and a holding shaft 2.
6, a holding flange 29 and a holding cap 31 for holding the core 28 are provided.
【００２０】芯金２８は外周面が周方向に凹凸状に形成
され、その外周に内周面を周方向に凹凸状に形成して嵌
合するようにしたゴム試験片Ｘが装着される。芯金２８
にゴム試験片Ｘを取り付け、その芯金２８を保持軸２６
に嵌合させた後、芯金回り止めピン３０を挿入し、押さ
えフランジ２９と押さえキャップ３１とを保持軸２６の
先端側からセットしてボルト３１Ａで固定することによ
り、保持部２５にゴム試験片Ｘを保持するようにしてあ
る。この保持部２５は、ドラム４の上方に対設された位
置となり、駆動モータ１９の作動により回転するように
なっている。The core metal 28 has an outer peripheral surface formed in an irregular shape in the circumferential direction, and a rubber test piece X in which an inner peripheral surface is formed in an uneven shape in the circumferential direction and fitted to the outer periphery thereof is mounted. Core metal 28
A rubber test piece X is attached to the
Then, the core metal stopper pin 30 is inserted, the holding flange 29 and the holding cap 31 are set from the front end side of the holding shaft 26 and fixed with the bolts 31A. X is held. The holding portion 25 is located at a position opposed to the upper side of the drum 4, and is rotated by the operation of the drive motor 19.
【００２１】支持壁１３の前側上部側部にはブラケット
３２が突設され、このブラケット３２に上方に突出する
２本のロッド３３ａを伸縮自在に備えたシリンダ３３の
側部が固定されている。昇降体１５の前側上部側部に水
平に突設されたブラケット３４には２本の支持棒３５が
垂直に立設固定され、この支持棒３５の上端に固定され
たプレート部材３６の後部下面に上記ロッド３３ａの先
端（上端）が固定されている。シリンダ３３がオンにな
ると、ロッド３３ａを図３に示すように縮小状態にし、
ゴム試験片Ｘがドラム４の摩擦面４ｃに当接するように
保持部２５を試験位置に移動させる。一方、シリンダ３
３がオフになると、ロッド３３ａを伸長状態にし、ゴム
試験片Ｘがドラム４の摩擦面４ｃから離間するように保
持部２５を待機位置に移動させる。また、プレート部材
３６の前部下面には、荷重シリンダ（荷重負荷手段）３
７が取り付けられ、その下方に突出するロッド３７ａの
先端（下端）に押圧パッド３７ｂが設けられている。A bracket 32 protrudes from the front upper side of the support wall 13, and a side portion of a cylinder 33 having two rods 33a projecting upward and extending freely is fixed to the bracket 32. Two support rods 35 are vertically erected and fixed to a bracket 34 projecting horizontally on the front upper side of the elevating body 15. A plate member 36 fixed to the upper end of the support rod 35 has a rear lower surface. The tip (upper end) of the rod 33a is fixed. When the cylinder 33 is turned on, the rod 33a is contracted as shown in FIG.
The holding unit 25 is moved to the test position so that the rubber test piece X comes into contact with the friction surface 4c of the drum 4. On the other hand, cylinder 3
When 3 is turned off, the rod 33a is extended, and the holding unit 25 is moved to the standby position so that the rubber test piece X is separated from the friction surface 4c of the drum 4. A load cylinder (load-loading means) 3 is provided on the lower surface of the front part of the plate member 36.
7 is attached, and a pressing pad 37b is provided at the tip (lower end) of a rod 37a projecting downward.
【００２２】円筒体２３の先端部上部には荷重用部材４
０が上方に突設され、その前方に突出する水平板部４０
ａ上にロードセル（荷重検出手段）４１が設置されてい
る。このロードセル４１の上方に上記荷重シリンダ３７
が位置し、ロッド３７ａを伸長して押圧パット３７ｂに
よりロードセル４１に荷重を加えることにより、荷重用
部材４０、円筒体２３を介して、保持部２５に装着され
たゴム試験片Ｘに荷重を負荷できるようになっている。
ロードセル４１では、負荷された荷重が検出される。A load member 4 is provided above the tip of the cylindrical body 23.
0 protrudes upward, and a horizontal plate portion 40 protrudes forward.
A load cell (load detecting means) 41 is installed on the position a. The load cylinder 37 is provided above the load cell 41.
Is positioned, the rod 37a is extended, and a load is applied to the load cell 41 by the pressing pad 37b, so that the load is applied to the rubber test piece X attached to the holding portion 25 via the load member 40 and the cylindrical body 23. I can do it.
The load cell 41 detects the applied load.
【００２３】支持壁１３の中央部上部側面には、所定の
角度だけ回動自在な回動体４２が突設され、この回動体
４２の前端部にはワイヤ４３が吊設されている。他方、
昇降体１５の中央部上端にはフック４４が突設され、こ
のフック４４にワイヤ４３の下端部が取り付けられてい
る。また、回動体４２の後端に後方に向けて突設された
アーム部材４５には重量体４６がアーム部材４５の長手
方向に沿って摺動可能に取り付けられている。これら回
動体４２、ワイヤ４３、フック４４、アーム部材４５及
び重量体４６は、試験片Ｘに対する負荷荷重を相殺する
カウンターバランス４７（荷重均衡手段）を構成してい
る。即ち、カウンターバランス４７は重量体４６の重量
に基づいて回動体４２を矢印ｅの方向の回転させ、ワイ
ヤ４３を介して昇降体１５を上方に引き上げるように作
用するが、アーム部材４５の長手方向に対する重量体４
６の位置を適切に調整することにより、試験片Ｘに対す
る負荷荷重を相殺するようになっている。そのため、荷
重シリンダ３７から与えられる荷重をロードセル４１に
より正確に測定することが可能である。On the upper side of the central portion of the support wall 13, a rotating body 42 that is rotatable by a predetermined angle protrudes, and a wire 43 is suspended from the front end of the rotating body 42. On the other hand,
A hook 44 projects from the upper end of the center of the elevating body 15, and the lower end of the wire 43 is attached to the hook 44. A weight 46 is slidably attached to the arm 45 projecting rearward from the rear end of the rotating body 42 along the longitudinal direction of the arm 45. The rotating body 42, the wire 43, the hook 44, the arm member 45, and the weight body 46 constitute a counterbalance 47 (load balancing means) for canceling a load applied to the test piece X. That is, the counterbalance 47 acts to rotate the rotating body 42 in the direction of the arrow e based on the weight of the weight body 46 and to lift the elevating body 15 upward through the wire 43. Weight body 4 for
By appropriately adjusting the position of No. 6, the load applied to the test piece X is offset. Therefore, the load applied from the load cylinder 37 can be accurately measured by the load cell 41.
【００２４】上記保持手段２１とドラム４とは、断熱部
材５０で囲まれた恒温槽５１内に配設されている。保持
手段２１とドラム４とは、保持部２５に装着されたゴム
試験片Ｘがドラム４と当接する部分に開口部を形成した
仕切り板５２により仕切られている。その仕切り板５２
には多数の貫通孔５３が形成されている。The holding means 21 and the drum 4 are disposed in a thermostatic chamber 51 surrounded by a heat insulating member 50. The holding means 21 and the drum 4 are separated from each other by a partition plate 52 having an opening formed in a portion where the rubber test piece X mounted on the holding portion 25 contacts the drum 4. The partition plate 52
Have a large number of through holes 53 formed therein.
【００２５】保持手段２１が配置された上部恒温室５１
ａの壁面には、エアの供給口５４が設けられている。こ
の供給口５４は不図示の配管を介してケーシング１の右
側後部に設置されたエア供給源５５に接続されている。
エア供給源５５では、ヒータにより外部から取り入れた
エアを加熱し、また冷凍機により冷却し、エアを２℃〜
６０℃の範囲で温度調整でき、その温度調整されたエア
を供給口５４から上部恒温室５１ａに供給できるように
なっている。供給口５４から上部恒温室５１ａに供給さ
れたエアは、仕切り板５２の貫通孔５３を通って下部恒
温室５１ｂの壁面に形成された排出口５６から不図示の
フィルターを介して外部に放出されるようにしてある。An upper constant temperature chamber 51 in which the holding means 21 is disposed.
An air supply port 54 is provided on the wall surface of a. The supply port 54 is connected to an air supply source 55 installed at a rear right portion of the casing 1 via a pipe (not shown).
In the air supply source 55, the air taken in from the outside is heated by a heater and cooled by a refrigerator, and the air is cooled to 2 ° C.
The temperature can be adjusted within the range of 60 ° C., and the temperature-adjusted air can be supplied from the supply port 54 to the upper constant temperature chamber 51a. The air supplied from the supply port 54 to the upper constant temperature chamber 51a passes through the through hole 53 of the partition plate 52, and is discharged to the outside from a discharge port 56 formed on the wall surface of the lower constant temperature chamber 51b via a filter (not shown). It is so.
【００２６】また、ドラム４とその上方の保持部２５と
の間には、水張りトレイ６０が設けられている。この水
張りトレイ６０は保持部２５と共に前後に往復移動可能
になっている。水張りトレイ６０の底部には、図６に示
すように、開口部６０ａが形成され、その開口部６０ａ
を介してドラム４の摩擦面と保持部２５に保持されたゴ
ム試験片Ｘが当接するように構成され、開口部６０ａと
ドラム４の摩擦面４ｃとの隙間ｓから水張りトレイ６０
に張られた水を下方に排出するようになっている。この
隙間ｓは任意に調整可能になっている。A water-filled tray 60 is provided between the drum 4 and the holding portion 25 above the drum 4. The water tray 60 is reciprocally movable back and forth together with the holding unit 25. As shown in FIG. 6, an opening 60a is formed at the bottom of the water-filled tray 60.
The frictional surface of the drum 4 and the rubber test piece X held by the holding unit 25 are configured to contact each other through the opening 60a and the water-filled tray 60 through the gap s between the opening 60a and the friction surface 4c of the drum 4.
It is designed to discharge the water stretched downward. This gap s can be arbitrarily adjusted.
【００２７】一方、水張りトレイ６０の上方には水を供
給する給水部６２が設けられている。この給水部６２は
ケーシング１の左側後部に設置された水供給源６３に接
続され、通常は水張りトレイ６０から排出される水より
も多くの水を供給できるようにしてある。但し、給水部
６２は必要に応じて供給水量を絞ることも可能である。
水供給源６３では水温コントローラにより水を２℃〜６
０℃の範囲で温度調整できるようになっている。On the other hand, a water supply section 62 for supplying water is provided above the water filling tray 60. The water supply unit 62 is connected to a water supply source 63 installed at the rear left portion of the casing 1 so that more water can be supplied than water normally discharged from the water filling tray 60. However, the water supply unit 62 can also reduce the amount of supplied water as needed.
In the water supply source 63, water is controlled at 2 ° C. to 6
The temperature can be adjusted in the range of 0 ° C.
【００２８】下部恒温室５１ｂの傾斜面に形成された床
面５１ｘには排出口６４が形成され、この排出口６４は
水供給源６３に接続されている。ドラム４の下方の床面
５１ｘ上方には床面全面を覆うようにフィルター６５が
配設されている。水張りトレイ６０の隙間ｓから流れ出
た水は、フィルター６５を介して排出口６４から水供給
源６３に戻り、循環するようになっている。図中、７０
は試験片交換用ドア、７１は研摩紙張替え用治具、７２
は研摩紙張替え用ドア、７３は操作パネルである。A discharge port 64 is formed in the floor surface 51x formed on the inclined surface of the lower thermostatic chamber 51b, and the discharge port 64 is connected to a water supply source 63. A filter 65 is provided above the floor surface 51x below the drum 4 so as to cover the entire floor surface. The water flowing out from the gap s of the water-filled tray 60 returns to the water supply source 63 from the outlet 64 via the filter 65 and circulates. In the figure, 70
Is a door for exchanging test pieces, 71 is a jig for exchanging abrasive paper, 72
Is a door for changing the abrasive paper, and 73 is an operation panel.
【００２９】上記摩擦試験機においては、待機位置で保
持部２５にゴム試験片Ｘを装着した後、シリンダ３３を
作動し、そのロッド３３ａを縮小した状態にする。それ
により、昇降体１５が降下して、保持部２５に保持され
ているゴム試験片Ｘがドラム４の摩擦面４ｃに当接した
状態になる（図３）。次いで、供給口５４からエアを供
給し、上部恒温室５１ａ内が所定の試験温度になった
後、荷重シリンダ３７を押圧作動し、ゴム試験片Ｘに所
定の負荷を与える。ウェット時の摩擦係数を測定する場
合には、水張りトレイ６０に給水部６２から所定の温度
の水を供給し、所定の水深となるように水を張るように
する。In the above-mentioned friction tester, after the rubber test piece X is mounted on the holding portion 25 at the standby position, the cylinder 33 is operated to reduce the rod 33a. As a result, the elevating body 15 descends, and the rubber test piece X held by the holding portion 25 comes into contact with the friction surface 4c of the drum 4 (FIG. 3). Next, air is supplied from the supply port 54, and after the inside of the upper constant temperature chamber 51a reaches a predetermined test temperature, the load cylinder 37 is pressed to apply a predetermined load to the rubber test piece X. When measuring the friction coefficient at the time of wet, water of a predetermined temperature is supplied from the water supply unit 62 to the water filling tray 60 so that the water is filled to a predetermined water depth.
【００３０】タイヤ制動時のスリップ条件における摩擦
係数を測定する場合は、保持手段２１の位置を軸方向に
固定した状態で駆動モータ７，１９の回転速度をそれぞ
れ制御し、ドラム４を一定の回転速度に保持する一方
で、保持手段２１をゴム試験片Ｘの表面速度とドラム４
の表面速度とを等速にする回転速度から停止状態まで減
速し、そのスリップ率を０％から１００％まで連続的に
変化させる。このとき、ロードセル４１で検出された荷
重データとトルクメータ１８で検出されたトルクデータ
は不図示のコンピュータに順次送られ、そこで各スリッ
プ率に応じた摩擦係数がそれぞれ算出され、摩擦係数−
スリップ率曲線（μ−Ｓカーブ）が求められる。従っ
て、スリップ率を０〜１００％まで変化させた時の摩擦
係数−スリップ率の関係をゴム試験片の段階で正確に測
定することができる。When measuring the friction coefficient under the slip condition during tire braking, the rotation speed of the drive motors 7 and 19 is controlled while the position of the holding means 21 is fixed in the axial direction, and the drum 4 is rotated at a constant speed. While holding at the speed, the holding means 21 is connected to the surface speed of the rubber test piece X and the drum 4
The surface speed is reduced from the rotation speed that makes the surface speed equal to the stop speed, and the slip ratio is continuously changed from 0% to 100%. At this time, the load data detected by the load cell 41 and the torque data detected by the torque meter 18 are sequentially sent to a computer (not shown), where a friction coefficient corresponding to each slip ratio is calculated, and a friction coefficient −
A slip ratio curve (μ-S curve) is obtained. Therefore, the relationship between the friction coefficient and the slip ratio when the slip ratio is changed from 0 to 100% can be accurately measured at the stage of the rubber test piece.
【００３１】また、タイヤ間欠制動時のスリップ条件に
おける摩擦係数を測定する場合は、保持手段２１の位置
を軸方向に固定した状態で駆動モータ７，１９の回転速
度をそれぞれ制御し、ドラム４を一定の回転速度に保持
する一方で、保持手段２１をゴム試験片Ｘの表面速度と
ドラム４の表面速度とを等速にする回転速度を上限とし
て繰り返し加減速し、スリップ率０〜１００％の任意の
範囲で、より好ましくは０〜２０％の範囲で連続的に変
化させ、上記と同様にスリップ率に応じた摩擦係数を求
めるようにする。一般に、ＡＢＳ（アンチロックブレー
キ装置）を採用した自動車では、タイヤのスリップ率が
例えば０〜２０％の範囲で変化するような間欠制動が行
われるが、上記摩擦試験方法では、上記タイヤ間欠制動
時のスリップ条件を再現し、そのスリップ条件での摩擦
係数を正確に測定することができる。When measuring the friction coefficient under the slip condition at the time of intermittent braking of the tire, the rotation speed of the drive motors 7 and 19 is controlled while the position of the holding means 21 is fixed in the axial direction, and the drum 4 is driven. While maintaining a constant rotation speed, the holding means 21 is repeatedly accelerated and decelerated with the rotation speed at which the surface speed of the rubber test piece X and the surface speed of the drum 4 are made equal to each other as an upper limit, and the slip ratio is 0 to 100%. The friction coefficient is continuously changed in an arbitrary range, more preferably in a range of 0 to 20%, and a friction coefficient according to the slip ratio is obtained in the same manner as described above. Generally, in an automobile employing an ABS (anti-lock brake device), intermittent braking is performed such that a tire slip ratio changes in a range of, for example, 0 to 20%. And the coefficient of friction under the slip condition can be accurately measured.
【００３２】また、実車により近いＡＢＳ制動時のスリ
ップ条件を再現しながら摩擦係数を測定したい場合は、
保持手段２１の位置を軸方向に固定した状態で駆動モー
タ７，１９の回転速度をそれぞれ制御し、ドラム４を特
定の回転速度から減速する一方で、保持手段２１をゴム
試験片Ｘの表面速度とドラム４の表面速度とを等速にす
る回転速度を上限として繰り返し加減速し、スリップ率
０〜１００％の任意の範囲で、より好ましくは０〜２０
％の範囲で連続的に変化させ、上記と同様にスリップ率
に応じた摩擦係数を求めるようにする。実車ではタイヤ
が制動しながら減速するため、上記摩擦試験方法によれ
ば実車により近いスリップ条件を再現することが可能に
なる。When it is desired to measure the friction coefficient while reproducing the slip condition at the time of ABS braking closer to the actual vehicle,
With the position of the holding means 21 fixed in the axial direction, the rotation speeds of the drive motors 7 and 19 are controlled to reduce the drum 4 from a specific rotation speed, while the holding means 21 is moved to the surface speed of the rubber test piece X. And the surface speed of the drum 4 are repeatedly accelerated and decelerated with the upper limit being the rotational speed at which the slip rate is set to a constant speed, and more preferably within a range of 0 to 100%, more preferably 0 to 20
%, And the friction coefficient according to the slip ratio is determined in the same manner as described above. In a real vehicle, the tires are decelerated while braking, so according to the friction test method, it is possible to reproduce a slip condition closer to that of a real vehicle.
【００３３】更に、タイヤ発進時のスリップ条件におけ
る摩擦係数を測定する場合は、保持手段２１の位置を軸
方向に固定した状態で駆動モータ７，１９の回転速度を
それぞれ制御し、ドラム４を停止状態に保持する一方
で、保持手段２１を停止状態から回転駆動し、そのとき
の摩擦係数を求めるようにする。この場合、タイヤ発進
時のスリップ条件を再現し、そのスリップ条件での摩擦
係数を正確に測定することができる。Further, when measuring the friction coefficient under the slip condition at the time of starting the tire, the rotational speeds of the drive motors 7 and 19 are controlled while the position of the holding means 21 is fixed in the axial direction, and the drum 4 is stopped. While maintaining the state, the holding means 21 is rotationally driven from the stopped state, and the friction coefficient at that time is determined. In this case, the slip condition at the time of starting the tire can be reproduced, and the coefficient of friction under the slip condition can be accurately measured.
【００３４】上記試験終了後においては、昇降体１５を
引き上げてゴム試験片Ｘを装着した保持部２５を待機位
置に移動させる。別のゴム試験片Ｘを続けて試験する場
合には、保持部２５のゴム試験片Ｘを交換し、モータ１
２ａの作動によりボールネジ１２を回転させ、移動体１
１をガイドレール１０に沿って移動させて、保持部２５
のゴム試験片Ｘを次の摩擦面（レーン）４ｃ上に移動さ
せた後、上記と同様にして試験を行う。After the test is completed, the elevating body 15 is pulled up, and the holding portion 25 on which the rubber test piece X is mounted is moved to the standby position. When another rubber test piece X is to be continuously tested, the rubber test piece X of the holding portion 25 is replaced and the motor 1
2a, the ball screw 12 is rotated, and the moving body 1
1 is moved along the guide rail 10 so that the holding portion 25
After moving the rubber test piece X on the next friction surface (lane) 4c, the test is performed in the same manner as described above.
【００３５】本発明において、上記ドラム４の外周面４
ａの直径としては、ゴム試験片Ｘの直径の５倍以上、好
ましくは１０倍以上にするのが良い。この外周面４ａの
外径は５００〜３０００mmにすることが好ましく、例え
ば外径１０００mmにすることができる。このように試験
片に対して径を大きくした大径のドラム４の使用によ
り、外周面４ａの曲率の影響を抑えて実路面に近い状態
にすると共に、試験中に走行した同じ摩擦面上をゴム試
験片Ｘが走行する回数を少なくし、試験片の摩耗による
摩擦面の状態変化を抑えることが可能になるので、摩擦
力の測定をより正確に行うことができる。In the present invention, the outer peripheral surface 4 of the drum 4
The diameter of a is 5 times or more, preferably 10 times or more, the diameter of the rubber test piece X. The outer diameter of the outer peripheral surface 4a is preferably set to 500 to 3000 mm, and for example, can be set to 1000 mm. The use of the large-diameter drum 4 having a diameter larger than that of the test piece suppresses the influence of the curvature of the outer peripheral surface 4a so as to be close to the actual road surface, and at the same time on the same friction surface that traveled during the test. Since the number of times the rubber test piece X travels can be reduced and the change in the state of the friction surface due to wear of the test piece can be suppressed, the friction force can be measured more accurately.
【００３６】ドラム４の摩擦面４ｃを形成する研摩紙４
ｂは、実路面に応じた粗さを持つものを使用することが
好ましく、エメリーペーパーとしては粗さが＃８０〜＃
８００のものを好ましく使用することができる。Abrasive paper 4 forming friction surface 4c of drum 4
It is preferable that b has a roughness corresponding to the actual road surface, and the emery paper has a roughness of # 80 to # 80.
800 can be preferably used.
【００３７】上述したゴム試験片Ｘの寸法としては、外
径３０〜２００mmにすることが好ましく、例えば外径１
００mmにすることができる。また、ゴム試験片Ｘの幅は
１０〜２０mmにすることができる。その試験片を取り付
ける芯金２８の外径（凸部における外径）としては、例
えば、７０mmにすることができる。The size of the rubber test piece X described above is preferably 30 to 200 mm in outer diameter.
00 mm. The width of the rubber test piece X can be set to 10 to 20 mm. The outer diameter (outer diameter at the convex portion) of the cored bar 28 to which the test piece is attached can be, for example, 70 mm.
【００３８】本発明の摩擦試験機は、上述したように試
験片にゴム試験片を使用し、ゴムの摩擦係数（特に、空
気入りタイヤに使用されるゴムの摩擦係数）を測定する
場合に好ましく用いることができるが、それに限定され
ず、合成樹脂等の弾性体からなる試験片を用いて、その
摩擦係数を測定するようにしても良い。The friction tester of the present invention is preferably used when measuring the friction coefficient of rubber (particularly, the friction coefficient of rubber used for pneumatic tires) by using a rubber test piece as a test piece as described above. It can be used, but is not limited thereto, and the friction coefficient may be measured using a test piece made of an elastic body such as a synthetic resin.
【００３９】[0039]
【発明の効果】上述したように本発明によれば、試験片
の保持手段及びドラムの回転速度をそれぞれ制御自在に
構成すると共に、少なくとも摩擦試験時には保持手段の
位置を軸方向に固定するようにしたので、任意のスリッ
プ条件を設定可能であり、そのスリップ条件において試
験片の摩擦係数を正確に測定することができる。As described above, according to the present invention, the rotation speed of the holding means for the test piece and the rotational speed of the drum are configured to be controllable, and the position of the holding means is fixed in the axial direction at least during the friction test. Therefore, any slip condition can be set, and the friction coefficient of the test piece can be accurately measured under the slip condition.
【図１】本発明の摩擦試験機の一例を示す正面図であ
る。FIG. 1 is a front view showing an example of a friction tester according to the present invention.
【図２】図１の側断面図である。FIG. 2 is a side sectional view of FIG.
【図３】図２の要部拡大図である。FIG. 3 is an enlarged view of a main part of FIG. 2;
【図４】図３の平面図である。FIG. 4 is a plan view of FIG. 3;
【図５】（ａ）は保持手段の拡大断面図、（ｂ）は保持
手段の芯金に試験片を装着した状態を示す説明図であ
る。FIG. 5A is an enlarged sectional view of a holding unit, and FIG. 5B is an explanatory diagram showing a state where a test piece is mounted on a core of the holding unit.
【図６】水張りトレイの説明図である。FIG. 6 is an explanatory diagram of a water-filled tray.
３ ドラム回転軸 ４ ドラム ４ａ 外周面 ４ｃ 摩擦面 ７，１９ 駆動モータ １１ 移動体 １３ 支持壁 １５ 昇降体 １８ トルクメータ（トルク測定手段） ２１ 保持手段 ２２ 回転軸 ３７ 荷重シリンダ（荷重負荷手段） ４１ ロードセル（荷重検出手段） ４７ カウンターバランス（荷重均衡手段） ５１ 恒温槽 ６０ 水張りトレイ ６０ａ 開口部 ６２ 給水部 ６３ 水供給源 ｓ 隙間 Ｘ ゴム試験片 Reference Signs List 3 drum rotating shaft 4 drum 4a outer peripheral surface 4c friction surface 7, 19 drive motor 11 moving body 13 support wall 15 elevating body 18 torque meter (torque measuring means) 21 holding means 22 rotating shaft 37 load cylinder (load loading means) 41 load cell (Load detecting means) 47 Counterbalance (Load balancing means) 51 Thermostatic bath 60 Water-filled tray 60a Opening 62 Water supply unit 63 Water supply source s Gap X Rubber test piece
───────────────────────────────────────────────────── フロントページの続き (72)発明者 増井 道男 神奈川県平塚市追分２番１号 横浜ゴム株 式会社平塚製造所内 (72)発明者 三橋 健八 神奈川県平塚市追分２番１号 横浜ゴム株 式会社平塚製造所内 (72)発明者 佐藤 親弘 東京都国立市谷保1053−１ 株式会社日本 アプライドテクノロジ内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Michio Masui, Inventor 2-1 Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. Hiratsuka Works (72) Inventor Kenpachi Mihashi 2-1 Oiwake, Hiratsuka-shi, Kanagawa Yokohama Rubber Co., Ltd. Hiratsuka Works (72) Inventor Chihiro Sato 1053-1, Ichiya, Ichiya, Tokyo Japan Applied Technology Co., Ltd.
Claims (13)
と、前記摩擦面に接しながら回転走行する円板状の試験
片を保持する保持手段の回転軸とを互いに平行に配置
し、前記ドラム及び保持手段の回転速度をそれぞれ制御
自在に構成すると共に、前記保持手段に加わるトルクを
測定するトルク測定手段と、前記試験片に荷重を負荷す
る荷重負荷手段と、その荷重を検出する荷重検出手段と
を設け、少なくとも摩擦試験時には前記保持手段の位置
を軸方向に固定するようにした摩擦試験機。1. A rotating shaft of a drum having a friction surface provided on an outer peripheral surface thereof, and a rotating shaft of a holding means for holding a disk-shaped test piece rotating and running while being in contact with the friction surface, are arranged in parallel with each other; A torque measuring unit configured to control a rotation speed of the drum and the holding unit, and a torque applied to the holding unit; a load applying unit configured to apply a load to the test piece; and a load detecting the load. A friction tester provided with a detection means, wherein a position of the holding means is fixed in an axial direction at least during a friction test.
の直径の５倍以上にした請求項１に記載の摩擦試験機。2. The friction tester according to claim 1, wherein the diameter of the outer peripheral surface of the drum is at least five times the diameter of the test piece.
する複数のレーンを有する摩擦面を設け、前記試験片を
レーン毎に移動可能に構成した請求項１又は請求項２に
記載の摩擦試験機。3. The friction according to claim 1, wherein a friction surface having a plurality of lanes on which the test piece runs is provided on an outer peripheral surface of the drum, and the test piece is configured to be movable for each lane. testing machine.
し、前記ドラムの軸方向に平行移動可能な移動体上に支
持壁を立設し、該支持壁に沿って上下方向に進退自在な
昇降体を配設し、該昇降体に前記保持手段と前記トルク
測定手段を介して前記保持手段を駆動する駆動モータと
を搭載すると共に、前記支持壁に前記試験片に対する負
荷荷重を相殺する荷重均衡手段を設け、かつ前記昇降体
に前記荷重負荷手段を設置し、該荷重負荷手段が前記荷
重検出手段を介して前記保持手段に荷重を負荷する構成
にした請求項１乃至請求項３のいずれか１項に記載の摩
擦試験機。4. The holding means is disposed above the drum, a support wall is erected on a movable body which can move in parallel in the axial direction of the drum, and is vertically movable along the support wall. An elevating body is provided, and the elevating body is equipped with the driving means for driving the holding means via the holding means and the torque measuring means, and a load for offsetting a load applied to the test piece on the support wall. 4. The apparatus according to claim 1, wherein a balancing means is provided, and said load applying means is provided on said elevating body, and said load applying means applies a load to said holding means via said load detecting means. The friction tester according to claim 1.
て前記保持手段を配置し、該水張りトレイの底部に開口
部を形成し、該開口部を介して前記ドラムの摩擦面と前
記保持手段に保持された試験片が当接する構成にし、前
記水張りトレイに水を供給する給水部を設けると共に、
該水張りトレイの開口部と前記ドラムの摩擦面との隙間
から前記水張りトレイに張られた水を排出するようにし
た請求項１乃至請求項４のいずれか１項に記載の摩擦試
験機。5. The holding means is disposed above the drum via a water-filled tray, an opening is formed in the bottom of the water-filled tray, and the friction surface of the drum and the holding means are formed through the opening. A configuration in which the held test pieces are in contact with each other, and a water supply unit that supplies water to the water-filled tray is provided,
The friction tester according to any one of claims 1 to 4, wherein water stretched on the water-filled tray is discharged from a gap between an opening of the water-filled tray and a friction surface of the drum.
と共に、前記水張りトレイの開口部と前記ドラムの摩擦
面との隙間を調整可能にした請求項１乃至請求項５のい
ずれか１項に記載の摩擦試験機。6. The water supply unit according to claim 1, wherein an amount of water supplied to the water supply unit is adjustable, and a gap between an opening of the water filling tray and a friction surface of the drum is adjustable. The friction tester according to 1.
接続した請求項５又は請求項６に記載の摩擦試験機。7. The friction tester according to claim 5, wherein a water supply source capable of adjusting a water temperature is connected to the water supply unit.
温槽に温度調整されたエアを供給可能にした請求項１乃
至請求項７のいずれか１項に記載の摩擦試験機。8. The friction tester according to claim 1, wherein the holding means is installed in a thermostat so that air whose temperature is adjusted can be supplied to the thermostat.
と、前記摩擦面に接しながら回転走行する円板状の試験
片を保持する保持手段の回転軸とを互いに平行に配置
し、前記ドラム及び保持手段の回転速度をそれぞれ制御
自在に構成すると共に、前記保持手段に加わるトルクを
測定するトルク測定手段と、前記試験片に荷重を負荷す
る荷重負荷手段と、その荷重を検出する荷重検出手段と
を設け、少なくとも摩擦試験時には前記保持手段の位置
を軸方向に固定するようにした摩擦試験機を使用し、前
記ドラムの表面速度と前記試験片の表面速度との速度比
に基づいて任意のスリップ条件を設定すると共に、その
スリップ条件での摩擦係数を測定する摩擦試験方法。9. A rotating shaft of a drum having a friction surface provided on an outer peripheral surface thereof, and a rotating shaft of a holding means for holding a disk-shaped test piece which rotates while traveling in contact with the friction surface, are arranged in parallel with each other; A torque measuring unit configured to control a rotation speed of the drum and the holding unit, and a torque applied to the holding unit; a load applying unit configured to apply a load to the test piece; and a load detecting the load. At least at the time of a friction test, a friction tester is used to fix the position of the holding means in the axial direction, based on a speed ratio between the surface speed of the drum and the surface speed of the test piece. A friction test method for setting an arbitrary slip condition and measuring a friction coefficient under the slip condition.
る一方で、前記保持手段を前記試験片の表面速度と前記
ドラムの表面速度とを等速にする回転速度から停止状態
まで減速し、スリップ率０〜１００％の範囲でタイヤ制
動時のスリップ条件での摩擦係数を測定する請求項９に
記載の摩擦試験方法。10. While holding the drum at a constant rotation speed, the holding means decelerates from a rotation speed at which a surface speed of the test piece and a surface speed of the drum are made equal to a stop state, and causes a slip. The friction test method according to claim 9, wherein a friction coefficient under a slip condition during tire braking is measured in a range of a rate of 0 to 100%.
る一方で、前記保持手段を前記試験片の表面速度と前記
ドラムの表面速度とを等速にする回転速度を上限として
繰り返し加減速し、スリップ率０〜１００％の任意の範
囲でタイヤ間欠制動時のスリップ条件での摩擦係数を測
定する請求項９に記載の摩擦試験方法。11. While holding the drum at a constant rotation speed, the holding means repeatedly accelerates and decelerates the rotation speed to make the surface speed of the test piece and the surface speed of the drum the same speed as an upper limit, The friction test method according to claim 9, wherein a friction coefficient under slip conditions during intermittent braking of the tire is measured in an arbitrary range of a slip ratio of 0 to 100%.
する一方で、前記保持手段を前記試験片の表面速度と前
記ドラムの表面速度とを等速にする回転速度を上限とし
て繰り返し加減速し、スリップ率０〜１００％の任意の
範囲でタイヤ間欠制動時のスリップ条件での摩擦係数を
測定する請求項９に記載の摩擦試験方法。12. While the drum is decelerated from a specific rotation speed, the holding means is repeatedly accelerated and decelerated with an upper limit of a rotation speed at which a surface speed of the test piece and a surface speed of the drum are made equal, and The friction test method according to claim 9, wherein a friction coefficient under slip conditions during intermittent braking of the tire is measured in an arbitrary range of a slip ratio of 0 to 100%.
で、前記保持手段を停止状態から回転駆動し、タイヤ発
進時のスリップ条件での摩擦係数を測定する請求項９に
記載の摩擦試験方法。13. The friction test method according to claim 9, wherein, while the drum is held in a stopped state, the holding means is driven to rotate from the stopped state, and a friction coefficient under a slip condition at the time of starting the tire is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14228199A JP3878768B2 (en) | 1999-05-21 | 1999-05-21 | Friction tester and friction test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14228199A JP3878768B2 (en) | 1999-05-21 | 1999-05-21 | Friction tester and friction test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000329687A true JP2000329687A (en) | 2000-11-30 |
| JP3878768B2 JP3878768B2 (en) | 2007-02-07 |
Family
ID=15311726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14228199A Expired - Fee Related JP3878768B2 (en) | 1999-05-21 | 1999-05-21 | Friction tester and friction test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3878768B2 (en) |
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| JP2007017423A (en) * | 2005-06-08 | 2007-01-25 | Yokohama Rubber Co Ltd:The | Friction test method and friction tester |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187757U (en) * | 1982-06-08 | 1983-12-13 | 横浜ゴム株式会社 | Viscoelastic body wear test device |
| JPH01141336A (en) * | 1987-11-27 | 1989-06-02 | Bridgestone Corp | Frictional wear testing instrument |
| JPH01292232A (en) * | 1988-05-20 | 1989-11-24 | Bridgestone Corp | Frictional and wear tester |
| JPH02210243A (en) * | 1989-02-10 | 1990-08-21 | Tokyo Silicone Kk | Frictional wear testing machine |
| JPH0634507A (en) * | 1992-07-17 | 1994-02-08 | Yokohama Rubber Co Ltd:The | Wear test device |
| JPH08145866A (en) * | 1994-11-22 | 1996-06-07 | Yokohama Rubber Co Ltd:The | Moistening abrasion testing machine |
| JPH11326169A (en) * | 1998-05-08 | 1999-11-26 | Bridgestone Corp | Method for measuring degree of rubber wear |
-
1999
- 1999-05-21 JP JP14228199A patent/JP3878768B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58187757U (en) * | 1982-06-08 | 1983-12-13 | 横浜ゴム株式会社 | Viscoelastic body wear test device |
| JPH01141336A (en) * | 1987-11-27 | 1989-06-02 | Bridgestone Corp | Frictional wear testing instrument |
| JPH01292232A (en) * | 1988-05-20 | 1989-11-24 | Bridgestone Corp | Frictional and wear tester |
| JPH02210243A (en) * | 1989-02-10 | 1990-08-21 | Tokyo Silicone Kk | Frictional wear testing machine |
| JPH0634507A (en) * | 1992-07-17 | 1994-02-08 | Yokohama Rubber Co Ltd:The | Wear test device |
| JPH08145866A (en) * | 1994-11-22 | 1996-06-07 | Yokohama Rubber Co Ltd:The | Moistening abrasion testing machine |
| JPH11326169A (en) * | 1998-05-08 | 1999-11-26 | Bridgestone Corp | Method for measuring degree of rubber wear |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006343173A (en) * | 2005-06-08 | 2006-12-21 | Yokohama Rubber Co Ltd:The | Friction tester |
| JP2007017423A (en) * | 2005-06-08 | 2007-01-25 | Yokohama Rubber Co Ltd:The | Friction test method and friction tester |
| JP4591218B2 (en) * | 2005-06-08 | 2010-12-01 | 横浜ゴム株式会社 | Friction testing machine |
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| JP4665743B2 (en) * | 2005-12-09 | 2011-04-06 | 横浜ゴム株式会社 | Method for evaluating friction characteristics of rubber material on wet road surface |
| JP2008308116A (en) * | 2007-06-18 | 2008-12-25 | Yokohama Rubber Co Ltd:The | Method for measurement of sliding frictional force of tire, and apparatus therefor |
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| JP2016170138A (en) * | 2015-03-16 | 2016-09-23 | 住友ゴム工業株式会社 | Adhesive force testing method of tyre rubber |
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| CN116297162A (en) * | 2023-05-17 | 2023-06-23 | 成都理工大学 | Device and method for testing friction coefficient of discrete particle plugging material |
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