JP3189971B2 - Moving body structure of traveling wave motor - Google Patents
Moving body structure of traveling wave motorInfo
- Publication number
- JP3189971B2 JP3189971B2 JP31668889A JP31668889A JP3189971B2 JP 3189971 B2 JP3189971 B2 JP 3189971B2 JP 31668889 A JP31668889 A JP 31668889A JP 31668889 A JP31668889 A JP 31668889A JP 3189971 B2 JP3189971 B2 JP 3189971B2
- Authority
- JP
- Japan
- Prior art keywords
- moving body
- piezoelectric element
- friction material
- ultrasonic motor
- projection
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、移動体を有する超音波モータの構造に関す
るものである。The present invention relates to a structure of an ultrasonic motor having a moving body.
本発明は、移動体を有する超音波モータの構造に関
し、摩擦材が摺動部、フランジ部、結合部の一体構造
で、移動体部に固定することにより、摺動面の平坦度の
精度が良く、個々のバラツキが少なく、振動モレの少な
い、したがって、超音波モータの特性の安定化が計ら
れ、量産性の優れた移動体を有する超音波モータを提供
できるようにしたものである。The present invention relates to the structure of an ultrasonic motor having a moving body, wherein the friction material has an integral structure of a sliding portion, a flange portion, and a coupling portion, and is fixed to the moving body portion, so that the accuracy of flatness of a sliding surface is improved. It is an object of the present invention to provide an ultrasonic motor having a moving body excellent in mass-production, in which individual variations are small, vibration leakage is small, and the characteristics of the ultrasonic motor are stabilized.
従来の超音波モータの移動体構造は、第５図に示すよ
うに、金属性の移動体部に、樹脂あるいは複合プラスチ
ックからなる摩擦材を接着する構造であった。As shown in FIG. 5, the moving body structure of a conventional ultrasonic motor has a structure in which a friction material made of resin or composite plastic is bonded to a metallic moving body.
前記のような超音波モータの移動体の構造では、移動
体部と摩擦材の間の接着剤が存在しているため、接着剤
の厚みのバラツキにより、摩擦材の厚み及び平坦度に影
響を与え、超音波モータの特性のバラツキ要因となる。
そのバラツキを少なくするために、摩擦材を接着後、摺
動面を切削あるいは研削加工により、仕上加工を行なわ
なければならなく、量産性が悪い。また、高温多湿等の
耐環境性の信頼性も低い、という問題点があった。In the structure of the moving body of the ultrasonic motor as described above, since the adhesive exists between the moving body portion and the friction material, the variation in the thickness of the adhesive affects the thickness and flatness of the friction material. This causes a variation in the characteristics of the ultrasonic motor.
In order to reduce the variation, a finishing process must be performed by cutting or grinding the sliding surface after bonding the friction material, resulting in poor mass productivity. Further, there is a problem that the reliability of environmental resistance such as high temperature and high humidity is low.
そこで、本発明では、従来のこのような問題点を解決
するために、バラツキが少なく量産性に優れ、信頼性の
高い超音波モータ移動体の構造を提供することを目的と
する。In view of the foregoing, an object of the present invention is to provide a structure of a moving body of an ultrasonic motor, which has less variation, is excellent in mass productivity, and has high reliability, in order to solve such a conventional problem.
前記の問題点を解決するために、本発明においては、
複数の貫通穴を有する金属製の移動体部に、摺動部、結
合部、フランジ部よりなる摩擦材を貫通穴に結合部を持
つように、一体で成形することにより、接着剤を使わず
に移動体部に固定し、移動体を形成した。また、摺動部
の形状を、傾斜させたり、曲面にしたり、溝を有するよ
うに形成した。In order to solve the above problems, in the present invention,
By forming a friction material consisting of a sliding part, a coupling part, and a flange part integrally with a metal moving body part having a plurality of through-holes so that the through-hole has a coupling part, no adhesive is used. To form a moving body. In addition, the shape of the sliding portion was inclined, curved, or formed with a groove.
摩擦材が、接着剤等の中間物を含まずに、移動体部に
固定されているため、移動体部への密着性が良く、中間
物による振動モレもない。また接着剤の厚みのバラツキ
による、摩擦材の厚み及び平坦度のバラツキも小さくで
きる。そして、摺動面の形状に工夫を施したことによ
り、摩擦材と振動体との接触面積を小さくすることがで
き、接触面の面圧を高めることが可能となる。さらに、
移動体部と摩擦材が機械的に結合されているため、耐環
境性等の信頼性も高い。以上の作用から超音波モータの
特性のバラツキを小さくすることができる。Since the friction material is fixed to the moving body without including an intermediate such as an adhesive, the friction material has good adhesion to the moving body, and there is no vibration leakage due to the intermediate. In addition, variations in thickness and flatness of the friction material due to variations in the thickness of the adhesive can be reduced. And, by devising the shape of the sliding surface, the contact area between the friction material and the vibrating body can be reduced, and the surface pressure of the contact surface can be increased. further,
Since the moving body and the friction material are mechanically connected, reliability such as environmental resistance is high. From the above operation, variations in the characteristics of the ultrasonic motor can be reduced.
以下に、本発明の実施例を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明による超音波モータの移動体の基本
構成を示す。移動体は、金属からなる移動体部101と樹
脂あるいは複合プラスチックからなる摩擦材102から構
成される。摩擦材102は、振動体に設けられた突起との
接触面である円環状の摺動部103と、移動体部に固定す
るためのフランジ部104と、その両者を結合する結合部1
05が一体で構成されている。移動体部101には、複数の
貫通穴106があり、この部分に摩擦材の結合部105が充填
されている。結合部105の断面積は摺動部103及びフラン
ジ部104の断面積より狭いため、移動体部101を上下から
挟むという作用で、摩擦材102が移動体部101に固定され
る。具体的な製造方法は、金属の移動体部を金型にセッ
トして、射出成形によって、摩擦材を成形した。この方
法によって得られた移動体は、摩擦材を接着した移動体
よりも、超音波モータの特性のバラツキが少なく良好な
結果が得られた。FIG. 1 shows a basic configuration of a moving body of an ultrasonic motor according to the present invention. The moving body includes a moving body portion 101 made of metal and a friction material 102 made of resin or composite plastic. The friction material 102 has an annular sliding portion 103 which is a contact surface with a projection provided on the vibrating body, a flange portion 104 for fixing to the moving body portion, and a connecting portion 1 for connecting the both.
05 is integrally configured. The moving body 101 has a plurality of through-holes 106, which are filled with coupling portions 105 of a friction material. Since the cross-sectional area of the connecting portion 105 is smaller than the cross-sectional areas of the sliding portion 103 and the flange portion 104, the friction member 102 is fixed to the moving body portion 101 by the action of sandwiching the moving body portion 101 from above and below. In a specific manufacturing method, a friction member was formed by injection molding by setting a metal moving body portion in a mold. The moving body obtained by this method had less variation in the characteristics of the ultrasonic motor than the moving body to which the friction material was adhered, and good results were obtained.
第３図（ａ）〜（ｅ）及び第４図は、摺動部とフラン
ジ部の形状違いの他の実施例を示す断面図である。第３
図（ｃ）における摩擦材は、摺動部が径方向に傾斜して
いる形状である。第３図（ｄ）の摩擦材は、摺動部が曲
面を有する形状であり、また、第３図（ｅ）の摩擦材
は、摺動部が溝を有する形状となっている。摺動部を以
上のような形状にすることにより、摩擦材と振動体との
接触面積を小さくすることができ、接触面の面圧を高め
ることが可能となる。また、射出成形が可能のため、様
々な形状の摩擦材を容易に成形できる。3 (a) to 3 (e) and FIG. 4 are cross-sectional views showing another embodiment in which the shapes of the sliding portion and the flange portion are different. Third
The friction material in FIG. 3C has a shape in which the sliding portion is inclined in the radial direction. The friction material of FIG. 3 (d) has a shape in which the sliding portion has a curved surface, and the friction material of FIG. 3 (e) has a shape in which the sliding portion has a groove. By forming the sliding portion as described above, the contact area between the friction material and the vibrating body can be reduced, and the surface pressure of the contact surface can be increased. Further, since injection molding is possible, friction materials of various shapes can be easily molded.
本発明は、以上説明したように超音波モータの移動体
において、摩擦材を摺動部、結合部、フランジ部の一体
構造で、移動体部に固定することよって、移動体部と摩
擦材の間に接着剤等の中間物がなくなり、摩擦材の厚み
や平坦度のバラツキが少なくなり、振動モレも少なくな
るため、安定した超音波モータの特性が得られる。ま
た、摩擦材と摺動体との接触がほぼ線接触になることに
より、振動の伝達ロスを小さくし、効率の良い超音波モ
ータを実現することができる。また、射出成形加工だけ
で摩擦材が成形されるため、量産性の優れた移動体を提
供することができる。As described above, in the moving body of the ultrasonic motor, the friction material is fixed to the moving body in an integrated structure of the sliding portion, the connecting portion, and the flange as described above. Since there is no intermediate material such as an adhesive in between, the variation in the thickness and flatness of the friction material is reduced, and the leakage of vibration is reduced, so that stable ultrasonic motor characteristics can be obtained. Further, since the contact between the friction material and the sliding body is substantially linear contact, the transmission loss of vibration can be reduced, and an efficient ultrasonic motor can be realized. Further, since the friction material is formed only by the injection molding process, it is possible to provide a moving body excellent in mass productivity.
第１図は本発明による移動体の基本構成を示す断面図、
第２図は本発明による移動体の基本構成を示す平面図、
第３図（ａ）〜（ｅ）は本発明による移動体の他の実施
例を示す断面図、第４図は本発明による移動体の他の実
施例を示す平面図、第５図は従来の移動体の基本構成を
示す断面図、第６図は本発明による移動体を有する超音
波モータの断面図である。 101,201,301a,301b,301c,301d,301e,401,501……移動体
部 102,202,302a,302b,302c,302d,302e,402,502……摩擦材 103,203,403……摺動部 104,204,404……フランジ部 105,205,405……結合部 106……貫通穴 503……移動体部 601……加圧バネ 602……移動体 603……振動体 604……圧電素子 605……リード線 606……中心軸 607……固定台FIG. 1 is a sectional view showing a basic structure of a moving object according to the present invention,
FIG. 2 is a plan view showing a basic configuration of a moving object according to the present invention,
3 (a) to 3 (e) are sectional views showing another embodiment of the moving body according to the present invention, FIG. 4 is a plan view showing another embodiment of the moving body according to the present invention, and FIG. And FIG. 6 is a sectional view of an ultrasonic motor having a moving body according to the present invention. 101,201,301a, 301b, 301c, 301d, 301e, 401,501 ... moving body part 102,202,302a, 302b, 302c, 302d, 302e, 402,502 ... friction material 103,203,403 ... sliding part 104,204,404 ... flange part 105,205,405 ... joining part 106 …… Through hole 503 …… Moving body 601 …… Pressure spring 602 …… Moving body 603 …… Vibrating body 604 …… Piezoelectric element 605 …… Lead wire 606 …… Center axis 607 …… Fixed base
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−144771（ＪＰ，Ａ) 特開 昭62−138072（ＪＰ，Ａ) 特開 昭62−118780（ＪＰ，Ａ) 特開 昭61−295880（ＪＰ，Ａ) 特開 昭63−220781（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02N 2/00 C ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-144771 (JP, A) JP-A-62-138072 (JP, A) JP-A-62-118780 (JP, A) JP-A-61-118780 295880 (JP, A) JP-A-63-220781 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H02N 2/00 C
Claims (4)
発生する振動波を伝達する突起と、 前記突起に圧接され、摩擦駆動する移動体とを有する超
音波モータにおいて、 前記移動体は、樹脂あるいは複合プラスチックからなる
摩擦材を有し、 前記摩擦材は、前記突起との接触面である摺動部が、径
方向に傾斜している形状で、円環状に形成されているこ
とを特徴とする超音波モータ。A piezoelectric element; a vibrating body in which the piezoelectric element and an elastic body are joined; a projection provided on the vibrating body, for transmitting a vibration wave generated by expansion and contraction of the piezoelectric element; In the ultrasonic motor having a moving body that is frictionally driven, the moving body has a friction material made of resin or composite plastic, and the friction material has a sliding portion that is a contact surface with the projection, An ultrasonic motor characterized by being formed in an annular shape with a shape inclined in a radial direction.
発生する振動波を伝達する突起と、 前記突起に圧接され、摩擦駆動する移動体とを有する超
音波モータにおいて、 前記移動体は、樹脂あるいは複合プラスチックからなる
摩擦材を有し、 前記摩擦材は、前記突起との接触面である摺動部が、曲
面を有する形状で、円環状に形成されていることを特徴
とする超音波モータ。2. A piezoelectric element, a vibrating body in which the piezoelectric element and an elastic body are joined, a projection provided on the vibrating body, for transmitting a vibration wave generated by expansion and contraction of the piezoelectric element, and a pressure contact with the projection. In the ultrasonic motor having a moving body that is frictionally driven, the moving body has a friction material made of resin or composite plastic, and the friction material has a sliding portion that is a contact surface with the projection, An ultrasonic motor characterized in that it has a curved shape and is formed in an annular shape.
発生する振動波を伝達する突起と、 前記突起に圧接され、摩擦駆動する移動体とを有する超
音波モータにおいて、 前記移動体は、樹脂あるいは複合プラスチックからなる
摩擦材を有し、 前記摩擦材は、前記突起との接触面である摺動部が、溝
を有する形状で、円環状に形成されていることを特徴と
する超音波モータ。3. A piezoelectric element, a vibrating body in which the piezoelectric element and an elastic body are joined, a protrusion provided on the vibrating body, for transmitting a vibration wave generated by expansion and contraction of the piezoelectric element, and a pressure contact with the protrusion. In the ultrasonic motor having a moving body that is frictionally driven, the moving body has a friction material made of resin or composite plastic, and the friction material has a sliding portion that is a contact surface with the projection, An ultrasonic motor characterized by having a shape having a groove and being formed in an annular shape.
発生する振動波を伝達する突起と、 前記突起に圧接され、摩擦駆動する移動体とを有する超
音波モータにおいて、 前記移動体が複数の貫通穴を有する金属からなる移動体
部と、樹脂あるいは複合プラスチックからなる摩擦材を
有し、 前記摩擦材は、摺動部とフランジ部と、前記摺動部とフ
ランジ部の断面積より狭い断面積を有する結合部とから
なり、 前記移動体部の貫通穴の断面積が、概略前記結合部の断
面積と等しく、前記貫通穴内に前記結合部を有し、前記
フランジ部にて、前記摺動部を前記移動体部上に保持す
る構成で、 前記摺動部が、径方向に傾斜している形状さるいは曲面
を有する形状あるいは溝を有する形状のいずれかであ
り、円環状に形成されていることを特徴とする超音波モ
ータ。4. A piezoelectric element, a vibrating body in which the piezoelectric element and an elastic body are joined, a projection provided on the vibrating body, for transmitting a vibration wave generated by expansion and contraction of the piezoelectric element, and a pressure contact with the projection. In the ultrasonic motor having a moving body that is frictionally driven, the moving body has a moving body portion made of a metal having a plurality of through holes, and a friction material made of resin or composite plastic; A sliding portion, a flange portion, and a coupling portion having a cross-sectional area smaller than a cross-sectional area of the sliding portion and the flange portion, wherein a cross-sectional area of a through hole of the moving body portion is substantially equal to a cross-sectional area of the coupling portion. Equally, the coupling portion is provided in the through hole, and the sliding portion is held on the moving body portion by the flange portion. The sliding portion is shaped to be inclined in the radial direction. Or curved shape or groove An ultrasonic motor having any of the following shapes, and formed in an annular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31668889A JP3189971B2 (en) | 1989-12-05 | 1989-12-05 | Moving body structure of traveling wave motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31668889A JP3189971B2 (en) | 1989-12-05 | 1989-12-05 | Moving body structure of traveling wave motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03178580A JPH03178580A (en) | 1991-08-02 |
| JP3189971B2 true JP3189971B2 (en) | 2001-07-16 |
Family
ID=18079799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31668889A Expired - Fee Related JP3189971B2 (en) | 1989-12-05 | 1989-12-05 | Moving body structure of traveling wave motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3189971B2 (en) |
-
1989
- 1989-12-05 JP JP31668889A patent/JP3189971B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03178580A (en) | 1991-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5408534A (en) | Electret microphone assembly, and method of manufacturer | |
| US6528926B2 (en) | Driving apparatus | |
| JPS6058639B2 (en) | Piezoelectric bimorph or monomorph curved vibrator structure | |
| JP3189971B2 (en) | Moving body structure of traveling wave motor | |
| JP3743542B2 (en) | Method for producing molded product with fine hollow pipe | |
| JPS5843097U (en) | piezoelectric vibrator | |
| JPS6230396Y2 (en) | ||
| JPS5830392Y2 (en) | ultrasonic ceramic microphone | |
| CN203691619U (en) | Sound producing device and vibrating membrane assembly of same | |
| JPS633279Y2 (en) | ||
| JP3014245U (en) | Piezoelectric receiver | |
| JPS6047597A (en) | Speaker | |
| JPH023599Y2 (en) | ||
| JPH03285498A (en) | Piezoelectric acoustic device | |
| JPH0736639B2 (en) | Airborne ultrasonic transducer | |
| JP2827513B2 (en) | Manufacturing method of ultrasonic ceramic microphone | |
| JPH0345093U (en) | ||
| JPS5852771Y2 (en) | acoustic transducer | |
| JPH0296799A (en) | Piezoelectric buzzer and production thereof | |
| JPS63220773A (en) | Ultrasonic motor | |
| JPH081045U (en) | Ultrasonic transducer | |
| JPH0117913Y2 (en) | ||
| JPH0328634Y2 (en) | ||
| JPS60143099A (en) | Piezo-electric-type speaker | |
| JPS6185000A (en) | Speaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |