JPH0670450B2 - Disc-shaped friction body for ultrasonic motor - Google Patents
Disc-shaped friction body for ultrasonic motorInfo
- Publication number
- JPH0670450B2 JPH0670450B2 JP61048882A JP4888286A JPH0670450B2 JP H0670450 B2 JPH0670450 B2 JP H0670450B2 JP 61048882 A JP61048882 A JP 61048882A JP 4888286 A JP4888286 A JP 4888286A JP H0670450 B2 JPH0670450 B2 JP H0670450B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- fiber
- friction body
- disc
- fibers
- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 72
- 239000011230 binding agent Substances 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 4
- 229920003235 aromatic polyamide Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 239000011347 resin Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 13
- 239000002759 woven fabric Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は回転運動を摩擦力により伝達、停止、起動する
際にその接触面に配置することのできる超音波モータ用
の円板状摩擦体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc-shaped friction body for an ultrasonic motor, which can be arranged on the contact surface when transmitting, stopping or starting a rotary motion by friction force. Is.
従来の技術 超音波モータを安定に駆動するには、移動体と弾性体の
加圧接触状態を、接触面全域において十分に均一にする
ことが要求される。2. Description of the Related Art In order to stably drive an ultrasonic motor, it is required that the pressure contact state between the moving body and the elastic body be sufficiently uniform over the entire contact surface.
例えば移動体と振動体とは、加圧接触面全域において、
ムラなく一様、均一に押圧接触されていなければならな
いことは勿論、加圧接触面全域の各部を微視的にみた場
合において、各部における移動体と振動体の摩擦係数等
が大きなばらつき無く一様であることが要求される。For example, the moving body and the vibrating body are
It is of course necessary to make uniform and even pressure contact, and when microscopically observing each part of the entire pressure contact surface, there is no significant variation in the friction coefficient between the moving body and the vibrating body at each part. Is required.
そして、この均一で安定した加圧接触状態が得られない
ならば、移動体が受ける摩擦駆動力も安定せずに、超音
波モータの安定駆動は不可能となる。If the uniform and stable pressure contact state cannot be obtained, the friction drive force received by the moving body is not stable, and stable driving of the ultrasonic motor is impossible.
例えば、移動体と摩擦体の摩擦係数が、加圧接触面内に
おいて微視的にみて一様でない場合には、移動体に接触
する各波形頂部の間で摩擦力がばらつくこととなり、安
定した動作が行えないこととなる。For example, when the friction coefficient between the moving body and the friction body is microscopically non-uniform in the pressure contact surface, the frictional force varies between the corrugated crests that come into contact with the moving body and stabilizes. The operation cannot be performed.
以上の通り、超音波モータを安定に駆動するために、移
動体と振動体との均一な加圧接触状態を維持せねばなら
ない点は、超音波モータの動作原理に基づくものであ
る。As described above, the point that the uniform pressure contact state between the moving body and the vibrating body must be maintained in order to stably drive the ultrasonic motor is based on the operating principle of the ultrasonic motor.
さて、超音波モータは、振動体に加圧接触された移動体
を摩擦駆動するものであるから、その加圧接触面におけ
る摩耗が原理的に避けられない。Since the ultrasonic motor frictionally drives the moving body which is in pressure contact with the vibrating body, the pressure contact surface is inevitably abraded.
通常は、移動体も振動体も金属材料で形成される。この
場合、移動体と振動体を直接に加圧接触させると、金属
材料同士を直接に摩擦させることとなり、移動体、振動
体とも、加圧接触面における摩耗が著しく進行する。Usually, both the moving body and the vibrating body are made of a metal material. In this case, when the moving body and the vibrating body are directly brought into pressure contact with each other, the metal materials are directly rubbed with each other, and the wear of the pressing contact surface of both the moving body and the vibrating body remarkably progresses.
超音波モータは、高々１μｍ前後の振幅の弾性波によっ
て移動体を駆動するものであるから、この加圧接触面の
摩耗によって、移動体と振動体の均一な加圧接触状態が
損なわれ、その結果、超音波モータの動作は極めて不安
定でまた騒音の発生も著しいものとなり、その安定した
運転は不可能となる。Since the ultrasonic motor drives the moving body by means of elastic waves having an amplitude of about 1 μm at most, wear of the pressure contact surface impairs the uniform pressure contact state between the moving body and the vibrating body. As a result, the operation of the ultrasonic motor is extremely unstable and noise is significantly generated, which makes stable operation impossible.
そこで、超音波モータの構成としては、移動体と振動体
とを直接に加圧接触させずに、耐摩耗性に優れた摩擦体
を介して加圧接触なさしめることが行われている。通常
は、摩擦体は、移動体に接着等で固定される。Therefore, as a configuration of the ultrasonic motor, the moving body and the vibrating body are not directly in pressure contact with each other, but pressure contact is performed through a friction body having excellent wear resistance. Usually, the friction body is fixed to the moving body by adhesion or the like.
摩擦体を用いる場合において、摩擦体に要求される条件
は、移動体との摩擦による摩耗が少ないことは勿論、摩
擦体と移動体の均一な加圧接触状態を維持するために、
摩擦体の摩耗が、移動体との接触面の全域において一様
に生じることである。When using a friction body, the condition required for the friction body is, of course, that wear due to friction with the moving body is small, and in order to maintain a uniform pressure contact state between the friction body and the moving body,
Wear of the friction body occurs uniformly over the entire contact surface with the moving body.
もし、摩擦体に偏摩耗が生じた場合には、移動体と摩擦
体との均一な加圧接触状態を維持することはできず、超
音波モータの安定駆動は実現できない。If uneven wear occurs in the friction body, it is impossible to maintain a uniform pressure contact state between the moving body and the friction body, and stable driving of the ultrasonic motor cannot be realized.
従来から摩擦体としてはアスベスト繊維などの長さ数mm
の短繊維充填物をロープ状に成型し、これにフェノール
樹脂などの熱硬化性樹脂ワニスを含浸乾燥させてからこ
の樹脂含浸ロープを螺旋状に巻いて加熱加圧成型するこ
とにより、短繊維が有機結合材中に分散しているシート
状摩擦体がよく知られている。また、連続繊維を直線状
に一方向に配向させた後、熱硬化性樹脂を含浸させ、そ
れを積層するとともに加熱加圧成型することによりシー
ト状成型物を作成しそれを切削加工することにより、第
２図(a)に示すような連続繊維が一方向に配向した円板
状摩擦体がある。連続繊維を編むことにより織布状に
し、一方向配向の場合と同様の方法で作成された円板状
摩擦体〔第２図(b)〕も知られている。Conventionally, as a friction body, the length of asbestos fibers is several mm
The short fiber filler is molded into a rope, impregnated and dried with a thermosetting resin varnish such as phenol resin, and then the resin-impregnated rope is spirally wound and heat-pressed to form short fibers. Sheet-shaped friction bodies dispersed in an organic binder are well known. After orienting the continuous fibers linearly in one direction, impregnating a thermosetting resin, laminating it, and heat-press molding to create a sheet-shaped molded product, and by cutting it As shown in FIG. 2 (a), there is a disc-shaped friction body in which continuous fibers are oriented in one direction. A disk-shaped friction body [FIG. 2 (b)] is also known, which is formed by knitting continuous fibers into a woven fabric and is made in the same manner as in the case of unidirectional orientation.
発明が解決しようとする問題点 このような従来例においては、いずれの摩擦体において
も、実際の使用において偏摩耗が発生し、その結果、振
動体と摩擦体との一様な加圧接触状態を維持できず、超
音波モータを長期にわたり安定に駆動することができな
い、と言う課題を有していた。Problems to be Solved by the Invention In such a conventional example, uneven wear occurs in any friction body in actual use, and as a result, a uniform pressure contact state between the vibrating body and the friction body is obtained. However, there is a problem that the ultrasonic motor cannot be stably driven for a long period of time.
第１の従来例である、長さ数mmの短繊維充填物をロープ
状に成型し、これを螺旋状に巻いて形成した摩擦体にあ
っては、充填物である短繊維の繊維方向を一定方向に揃
えて充填することは困難であり、短繊維は全くランダム
な状態で、つまりある短繊維は、その繊維の配向方向が
ロープの長手方向に向き、他の物は、その繊維方向が、
ロープ状の長手方向と直角方向に向く等して、全くラン
ダムな状態でロープ状の成型体に充填される。The first conventional example is a friction body formed by molding a short fiber filler having a length of several mm into a rope shape and winding the rope in a spiral shape. It is difficult to pack the fibers in a uniform direction, and the short fibers are in a completely random state, that is, some short fibers have the fiber orientation direction oriented in the longitudinal direction of the rope, and others have the fiber direction ,
The rope-shaped molded body is filled in a completely random state such that it faces in the direction perpendicular to the rope-shaped longitudinal direction.
その結果、得られる摩擦体では、各部を微視的に見た場
合、短繊維が移動体の移動方向に直交する方向に配列し
た部分と、移動体の移動方向に平行な方向に配列した部
分、あるいは短繊維が摩擦体の厚み方向に配列した部分
等が、全くランダムに形成されていることとなる。As a result, in the obtained friction body, when each part is viewed microscopically, the short fibers are arranged in a direction orthogonal to the moving direction of the moving body and the part arranged in a direction parallel to the moving direction of the moving body. Alternatively, the portions in which the short fibers are arranged in the thickness direction of the friction body are formed at random.
従って、この様な摩擦体では、その各部において短繊維
の配列方向が種々に異なっており、そのために振動体と
の摩擦係数や耐摩耗性も各部において異なることとな
る。Therefore, in such a friction body, the arrangement directions of the short fibers are variously different in each part, and therefore, the friction coefficient with the vibrating body and the wear resistance are also different in each part.
従って、この様な摩擦体を超音波モータとして用いた場
合、短繊維の配列方向の差異に基づいて、摩擦係数や摩
耗量が摩擦体の各部において異なることとなり、振動体
と摩擦体との一様、均一な加圧接触状態が維持できず、
その結果、超音波モータの安定した運転も維持できなく
なる。特に摩耗量が摩擦体の各部において異なり、その
結果、偏摩耗が発生する点は、弾性振動の振幅が微小で
あることから致命的である。Therefore, when such a friction body is used as an ultrasonic motor, the friction coefficient and the amount of wear are different in each part of the friction body based on the difference in the arrangement direction of the short fibers, and one of the vibration body and the friction body is reduced. , A uniform pressure contact state cannot be maintained,
As a result, stable operation of the ultrasonic motor cannot be maintained. In particular, the amount of wear is different in each part of the friction body, and as a result, uneven wear occurs, which is fatal because the amplitude of elastic vibration is minute.
また、短繊維を充填した摩擦体では、短繊維の体積含有
率が50％を越えることが難しく、そえゆえ耐摩耗性自体
も、連続繊維を用いた場合よりも劣る。Further, in the friction body filled with short fibers, it is difficult for the volume content of the short fibers to exceed 50%, and therefore the abrasion resistance itself is inferior to that in the case of using continuous fibers.
一方、第２の従来例である、連続繊維を直線状に一方向
に配列させたものは、第２図(a)において点Ａでは摩擦
する相手材は繊維と垂直方向で摩擦し、点Ｂでは繊維と
平行方向に摩擦する。このように接触回転面に異方性が
あり、点ＡとＢとでは動摩擦係数および比摩耗量なども
異なり、均一な摩擦現象が起こらず問題であった。特
に、摩耗においては点ＡとＢでは長時間摩擦回転させた
場合に２倍以上の異方性が見られた。連続繊維を編むこ
とにより織布にしたものを摩擦体として用いると、摩耗
量などの異方性は一方向に連続繊維を配向させた場合よ
り少なくなるが、繊維が縦と横に交差している部分はそ
の分だけ繊維が盛り上がることになる。一般的に用いら
れている織布として平織を用いて、熱硬化性樹脂に含浸
させた成型物は摩擦接触面において繊維が表面に出てい
る部分と樹脂が表面に出ている部分が格子状に配列して
おり、回転摩擦することにより先ず樹脂が摩耗され、そ
の結果摩擦面が凹凸となり、初期の状態とは異なった摩
擦係数を示すことになり問題であった。また、相手材の
表面状態や形状により、その凸凹に引っ掛かることが起
こり、円滑な作動が望めなかった。また、超音波モータ
用の摩擦体として用いた際に摺動による騒音が起こるこ
とも問題であった。On the other hand, in the second conventional example in which continuous fibers are linearly arranged in one direction, the mating material that rubs at point A in FIG. Then rubs parallel to the fibers. As described above, the contact rotation surface has anisotropy, the dynamic friction coefficient and the specific wear amount are different between points A and B, and a uniform friction phenomenon does not occur, which is a problem. In particular, with respect to wear, anisotropy more than double was observed at points A and B when friction was rotated for a long time. When a woven fabric obtained by knitting continuous fibers is used as a friction body, the anisotropy of the amount of wear and the like is less than when the continuous fibers are oriented in one direction, but the fibers intersect in the longitudinal and transverse directions. The fiber will rise to the extent that it exists. A plain weave is used as a commonly used woven fabric, and a molded product impregnated with a thermosetting resin has a grid-like part where the fiber is exposed on the friction contact surface and the resin is exposed on the surface. Since the resin is first worn by the rotational friction, the friction surface becomes uneven, and the friction coefficient is different from the initial state, which is a problem. Also, depending on the surface condition and shape of the mating material, it may be caught in the unevenness, and smooth operation cannot be expected. Another problem is that noise is generated by sliding when used as a friction body for an ultrasonic motor.
以上、従来の課題を要約すると、従来の摩擦体にあって
は、移動体との摩擦によって偏摩耗が生じ、あるいは移
動体との摩擦係数が摩擦体の各部において異なるため
に、超音波モータを長期にわたり安定して駆動できず、
また騒音を発生すると言う課題を有していた。To summarize the conventional problems, in the conventional friction body, because the friction with the moving body causes uneven wear, or the friction coefficient with the moving body is different in each part of the friction body, the ultrasonic motor is I could not drive stably for a long time,
In addition, there is a problem that noise is generated.
本発明はこのような問題点を解決するもので、摩耗量が
極めて少なくかつ均質な摩擦現象が生じて摩耗量が均等
になり、円滑な作動が行なえ、摺動による騒音を少なく
することができるようにすることを目的とするものであ
る。The present invention solves such a problem, in which the amount of wear is extremely small and a uniform friction phenomenon occurs so that the amount of wear becomes uniform, smooth operation can be performed, and noise due to sliding can be reduced. The purpose is to do so.
問題点を解決するための手段 この問題点を解決するために本発明は、有機結合材と繊
維とを必須の成分としてなる超音波モータ用の円板状摩
擦体であって、前記繊維が連続繊維を含みかつ連続繊維
が円板状摩擦体の円周方向に配向されてなるものであ
る。Means for Solving the Problems In order to solve this problem, the present invention is a disc-shaped friction body for an ultrasonic motor, which comprises an organic binder and fibers as essential components, wherein the fibers are continuous. A continuous fiber containing fibers is oriented in the circumferential direction of the disk-shaped friction body.
作用 この構成により、連続繊維を用いているから、繊維の体
積含有率は充分大きくできるので充分な耐摩耗性が得ら
れ、円板状摩擦体自体の機械的強度も短繊維を分散させ
た場合と比較して充分大きくなる。さらに、円周方向に
繊維を配向しているので、回転運動による摩擦に対して
微視的に見ても常に同じ摩擦状態が得られる。その結
果、均一な摩耗が起こり、摺動面における摩耗厚は長時
間摩擦回転させても常に均一に摩耗してゆくことにな
る。また、摩擦係数もその接触面の均質性のため極端な
変化は起こらなく、摺動による騒音も従来に比較して少
なくなる。Action With this configuration, since continuous fibers are used, the volume content of the fibers can be made sufficiently large, so sufficient abrasion resistance is obtained, and the mechanical strength of the disc-shaped friction body itself is also obtained when short fibers are dispersed. It becomes big enough compared with. Furthermore, since the fibers are oriented in the circumferential direction, the same frictional state can be obtained at all times even when viewed microscopically with respect to friction due to rotational movement. As a result, uniform wear occurs, and the wear thickness on the sliding surface is always worn even after frictional rotation for a long time. Further, the friction coefficient does not change extremely due to the homogeneity of the contact surface, and the noise due to sliding is reduced as compared with the conventional case.
実施例 以下、本発明の実施例について、図面に基づいて説明す
る。Example Hereinafter, an example of the present invention will be described with reference to the drawings.
＜実施例１＞炭素繊維にエポキシ樹脂を含浸させてなる
一方向プレプリグを１層づつ金属芯に巻き付けた。プレ
プリグの幅は約1mmとした。この巻き付けたものを円板
状の上下に10kg／cm2の圧力を保ちつつ130℃で２時間放
置することにより樹脂を完全硬化させ、これにより繊維
体積含有率75％、厚さ1mmの円周方向に連続繊維１が配
向した円板状摩擦体〔第１図(a)参照〕を得た。第１図
(a)の白色部分は有機結合材２を示し、この実施例の場
合にはエポキシ樹脂である。これを、円筒端面間対ステ
ンレス連続すべり試験を行なった結果、比摩耗量は、3.
0×10-9cm2／kg・ｍとなった。これは、炭素繊維の短繊
維を体積含有率にて30％エポキシ樹脂中に分散させたサ
ンプルの比摩耗量4.5×10-7cm2／kg・ｍと比べて100倍
以上の優れた耐摩耗性を示した。また、一方向プレプリ
グや織布を用いてシート状に成型し円板形状に切削加工
したサンプルと比べて、摺動による騒音が全くなかっ
た。長時間の試験に対しても表面の状態には変化なく、
すべり摩耗試験測定中の摩擦抵抗は10％以内の範囲で安
定しており、また摩耗状態も均一であった。それに対し
て第２図(a)に示すサンプルは点Ａの方が点Ｂより摩耗
し易く、摩擦抵抗は試験開始から50％の範囲で変動し、
また第２図(b)に示すサンプルは約１時間にわたり摩擦
抵抗の値が徐々に1/3まで低下し、その摩耗表面は繊維
部分が残った凸凹状であった。<Example 1> A unidirectional prepreg obtained by impregnating carbon fiber with an epoxy resin was wound around a metal core one layer at a time. The width of the prepreg was about 1 mm. The resin is completely cured by allowing this wound material to stand at 130 ° C for 2 hours while maintaining a pressure of 10 kg / cm 2 on the upper and lower sides of the disk, which results in a fiber volume content of 75% and a circumference of 1 mm in thickness. A disc-shaped friction body in which continuous fibers 1 were oriented in the direction [see FIG. 1 (a)] was obtained. Fig. 1
The white part of (a) shows the organic binder 2, which is an epoxy resin in this example. As a result of performing a continuous sliding test between the end faces of the cylinder against stainless steel, the specific wear amount was 3.
It was 0 × 10 -9 cm 2 / kgm. This is 100 times more excellent wear resistance than the specific wear amount of 4.5 × 10 -7 cm 2 / kg ・ m of the sample in which 30% by volume of short fiber of carbon fiber is dispersed in epoxy resin. Showed sex. In addition, there was no noise due to sliding as compared with the sample which was molded into a sheet using a unidirectional prepreg or a woven fabric and cut into a disk shape. The surface condition does not change even after a long test,
The frictional resistance during the sliding wear test was stable within 10% and the wear condition was uniform. On the other hand, in the sample shown in FIG. 2 (a), the point A is more easily worn than the point B, and the frictional resistance varies within the range of 50% from the start of the test.
In the sample shown in FIG. 2 (b), the frictional resistance value gradually decreased to 1/3 over a period of about 1 hour, and the wear surface was uneven with the fiber portion remaining.
＜実施例２＞芳香族ポリアミド繊維を金属芯に巻き付け
た後、熱硬化性樹脂ワニスとしてビスマレイミド−トリ
アジン樹脂と可撓性賦与剤を添加してなる溶液に含浸さ
せ、その後150℃で数分乾燥させた後、円板状の上下に1
00kg／cm2の圧力を保ちつつ200℃にて２時間放置するこ
とにより、円周方向に繊維が螺旋状に巻かれている繊維
体積含有率70％の円板状摩擦体〔第１図(b)参照〕を得
た。これを実施例１と同様に円筒端面間対ステンレス連
続すべり試験を行なった結果、比摩耗量は5.0×10-9cm2
／kg・ｍとなった。これは、芳香族ポリアミド繊維のパ
ルプ状の短繊維を体積含有率にて10％同様の樹脂にて分
散させたサンプルの比摩耗量1.8×10-7cm2／kg・ｍと比
べて約40倍優れた耐摩耗性を示した。また、一方向プレ
プリグや織布を用いた場合には、実施例１と同様に円滑
な摩擦現象が起こらず、摩擦抵抗が変動したり摩耗が部
分的に起こったりしたのに対して、本発明の円板状摩擦
体は円滑な摩擦が起こり、摩耗も接触面に対して均一で
あった。なお、第１図(b)において１は連続繊維、２は
有機結合材である。<Example 2> After winding an aromatic polyamide fiber around a metal core, it is impregnated with a solution containing a bismaleimide-triazine resin as a thermosetting resin varnish and a flexibility-imparting agent, and then at 150 ° C for several minutes. After drying, 1 on the disc-shaped top and bottom
A disc-shaped friction body with 70% fiber volume content in which fibers are spirally wound in the circumferential direction by leaving it at 200 ° C for 2 hours while maintaining a pressure of 00 kg / cm 2 [Fig. 1 ( b) reference] was obtained. As a result of performing a continuous sliding test between the end faces of the cylinder and stainless in the same manner as in Example 1, the specific wear amount was 5.0 × 10 −9 cm 2.
/ Kg ・ m This is about 40% compared to the specific wear amount of 1.8 × 10 -7 cm 2 / kgm of the sample in which pulp-like short fibers of aromatic polyamide fiber are dispersed in 10% by volume of the same resin. It showed twice as good abrasion resistance. Further, when the unidirectional prepreg or the woven fabric was used, the smooth friction phenomenon did not occur as in the case of Example 1, and the frictional resistance fluctuated and the wear partially occurred. The disc-shaped friction body of No. 1 had smooth friction, and the wear was uniform with respect to the contact surface. In FIG. 1 (b), 1 is a continuous fiber and 2 is an organic binder.
以上、代表的な２つの実施例について述べたが、連続繊
維として前述の炭素繊維や芳香族ポリアミド繊維の他、
炭化珪素繊維、アルミナ繊維、ガラス繊維、ポリエステ
ル繊維、ポリアミド繊維などの少なくとも１つを用いた
場合も同様の傾向を示した。樹脂としては、フェノール
樹脂、エポキシ樹脂、ポリイミド樹脂、不飽和ポリエス
テル樹脂などの熱硬化性樹脂を主成分とし、各種の用途
に応じた改質材を混合したものが適していた。また、硫
酸バリウム、シリカ、炭酸カルシウム、グラファイトな
どの無機質充填物や銅粉などの金属粉を加えても、円板
状の円周方向に連続繊維が配向している摩擦体は、短繊
維分散の場合に比べ摩耗も少なく、回転運動に対する摩
擦抵抗も安定し、良好な結果が得られた。Two typical examples have been described above. In addition to the above-mentioned carbon fiber and aromatic polyamide fiber as continuous fibers,
The same tendency was exhibited when at least one of silicon carbide fiber, alumina fiber, glass fiber, polyester fiber, polyamide fiber and the like was used. As the resin, a resin containing a thermosetting resin such as a phenol resin, an epoxy resin, a polyimide resin, or an unsaturated polyester resin as a main component and a modifying agent mixed according to various uses was suitable. Even if an inorganic filler such as barium sulfate, silica, calcium carbonate or graphite or a metal powder such as copper powder is added, a friction material in which continuous fibers are oriented in a disc-shaped circumferential direction has short fiber dispersion. The wear was less than that in the case of No. 1, and the frictional resistance against rotary motion was stable, and good results were obtained.
本発明においては、連続繊維を一方向に配向あるいは織
布状のものを基材としてシート状成型物を得、適した円
板形状に切削加工する必要がなく、任意の円板形状に加
圧加熱することにより作成できるという特徴もある。さ
らに、その円板状摩擦体の機械的強度は連続繊維を用い
ているので、短繊維分散の場合よりはるかに大きく、薄
膜化が可能である。接触面を微視的に見ても、短繊維分
散の場合や織布に樹脂を含浸させた場合と比較して、円
板状の円周方向に連続繊維を配列された場合は接触表面
の均質性があり、要求される超音波モータの接触面など
に用いることにより、より安定した回転が可能になると
考えられる。In the present invention, a continuous fiber is oriented in one direction or a woven material is used as a base material to obtain a sheet-shaped molded product, which does not need to be cut into a suitable disc shape and can be pressed into an arbitrary disc shape. Another feature is that it can be created by heating. Further, since the disc-shaped friction body uses continuous fibers, it has a mechanical strength much larger than that in the case of short fiber dispersion, and can be made into a thin film. Even when the contact surface is viewed microscopically, compared with the case of short fiber dispersion or the case of impregnating a woven fabric with resin, when continuous fibers are arranged in the disk-like circumferential direction, the contact surface It has homogeneity, and it is considered that more stable rotation becomes possible by using it for the required contact surface of the ultrasonic motor.
発明の効果 以上のように本発明によれば、有機結合材と繊維とを必
須の成分とする円板状摩擦体において、連続繊維を円板
状の円周方向に配向させることにより、その摩擦体が回
転運動をしている接触面に配置され摩擦力を受ける際に
均質な摩擦現象が起こり、摩耗量も均等になる。EFFECTS OF THE INVENTION As described above, according to the present invention, in a disc-shaped friction body having an organic binder and fibers as essential components, by orienting continuous fibers in the disc-shaped circumferential direction, the friction When a body is placed on a rotating contact surface and receives a frictional force, a uniform friction phenomenon occurs and the amount of wear becomes even.
従って、本発明の摩擦体を超音波モータの摩擦体に用い
ることにより、超音波モータの動作原理に基づく固有の
課題を解決でき、超音波モータの円滑な作動ができ、摺
動による騒音も少なくすることができる。また連続繊維
を用いているので、摩擦体の機械的強度も充分に有し、
摩耗量も極めて少ない超音波モータ用の円板状摩擦体が
得られるものである。Therefore, by using the friction body of the present invention as a friction body of an ultrasonic motor, it is possible to solve the problems inherent in the operating principle of the ultrasonic motor, to enable smooth operation of the ultrasonic motor, and to reduce noise due to sliding. can do. Also, since continuous fibers are used, the friction body has sufficient mechanical strength,
It is possible to obtain a disc-shaped friction body for an ultrasonic motor that has an extremely small amount of wear.
第１図(a)および(b)は本発明の実施例を示し、第１図
(a)は円板状摩擦体のプレプリグを積層した場合の繊維
の配列状態を示す平面図、第１図(b)は円板状摩擦体の
繊維を螺旋状に巻いた場合の繊維の配列状態を示す平面
図、第２図(a)および(b)はそれぞれ異なった従来例を示
す平面図である。 １…連続繊維、２…有機結合材。1 (a) and (b) show an embodiment of the present invention.
(a) is a plan view showing an arrangement state of fibers when prepregs of a disc-shaped friction body are laminated, and FIG. 1 (b) is an arrangement of fibers when fibers of the disc-shaped friction body are spirally wound. A plan view showing a state and FIGS. 2 (a) and 2 (b) are plan views showing different conventional examples. 1 ... Continuous fiber, 2 ... Organic binder.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 米野 寛 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (56)参考文献 特開 昭53−13048（ＪＰ，Ａ) 特開 昭58−74462（ＪＰ，Ａ) 特開 昭57−40124（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Yoneno 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-53-13048 (JP, A) JP-A-58-74462 (JP, A) JP-A-57-40124 (JP, A)
Claims (2)
方向に配列された繊維と、その繊維を保持する有機結合
材を有する超音波モータ用の円板状摩擦体。1. A disc-shaped friction body for an ultrasonic motor, which has fibers arranged in a circumferential direction and having a continuous length in the circumference, and an organic binder that holds the fibers.
繊維、ガラス繊維、芳香族ポリアミド繊維、ポリエステ
ル繊維、ポリアミド繊維からなる群の少なくとも１つか
らなる特許請求の範囲第１項記載の超音波モータ用の円
板状摩擦体。2. The ultrasonic wave according to claim 1, wherein the fiber is at least one selected from the group consisting of carbon fiber, silicon carbide fiber, alumina fiber, glass fiber, aromatic polyamide fiber, polyester fiber and polyamide fiber. Disc-shaped friction body for motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61048882A JPH0670450B2 (en) | 1986-03-06 | 1986-03-06 | Disc-shaped friction body for ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61048882A JPH0670450B2 (en) | 1986-03-06 | 1986-03-06 | Disc-shaped friction body for ultrasonic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62209236A JPS62209236A (en) | 1987-09-14 |
| JPH0670450B2 true JPH0670450B2 (en) | 1994-09-07 |
Family
ID=12815654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61048882A Expired - Lifetime JPH0670450B2 (en) | 1986-03-06 | 1986-03-06 | Disc-shaped friction body for ultrasonic motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0670450B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1545081A (en) * | 1976-07-22 | 1979-05-02 | Automotive Prod Co Ltd | Friction facings for clutches and brakes |
-
1986
- 1986-03-06 JP JP61048882A patent/JPH0670450B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62209236A (en) | 1987-09-14 |
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