JP2551812B2 - Processing method for lining materials used in ultrasonic motors - Google Patents
Processing method for lining materials used in ultrasonic motorsInfo
- Publication number
- JP2551812B2 JP2551812B2 JP63114882A JP11488288A JP2551812B2 JP 2551812 B2 JP2551812 B2 JP 2551812B2 JP 63114882 A JP63114882 A JP 63114882A JP 11488288 A JP11488288 A JP 11488288A JP 2551812 B2 JP2551812 B2 JP 2551812B2
- Authority
- JP
- Japan
- Prior art keywords
- lining material
- vibrating body
- friction
- ultrasonic motor
- processing method
- 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
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、回転駆動用の超音波モータに使用されるラ
イニング材の加工方法に関するものである。TECHNICAL FIELD The present invention relates to a method of processing a lining material used in an ultrasonic motor for rotational driving.
（従来の技術） 従来の超音波モータについて、第３図により説明す
る。同図において、超音波モータは、圧電素子１を接着
したリング状の振動体２の摩擦面2aと、移動体３に接着
されたライニング材４の摩擦面4aを当接して互いに押圧
し、圧電素子１に発生する進歩波を制御して、これに接
着した振動体２の摩擦面2aに楕円運動の表面変位を生じ
る振動モードを発生せしめ、ライニング材４を介して当
接する移動体３に回転運動を与えるものである。従来、
上記のライニング材４の摩擦面4aは切削加工により仕上
げられることが一般的であった。(Prior Art) A conventional ultrasonic motor will be described with reference to FIG. In the figure, the ultrasonic motor abuts against the friction surface 2a of the ring-shaped vibrating body 2 to which the piezoelectric element 1 is adhered and the friction surface 4a of the lining material 4 adhered to the moving body 3 to press them against each other. The traveling wave generated in the element 1 is controlled to generate a vibration mode in which the frictional surface 2a of the vibrating body 2 bonded to the element 1 causes a surface displacement of an elliptic motion, and the moving body 3 abutting through the lining material 4 is rotated. It gives exercise. Conventionally,
The friction surface 4a of the lining material 4 was generally finished by cutting.
（発明が解決しようとする課題） しかしながら、切削加工による摩擦面4aは、第２図に
示すようにライニング材４が硬い摩擦材５と軟らかいバ
インダ樹脂６とで構成されているため、バイトにより切
削に際して切削抵抗が摩擦材部では増大し、バインダ樹
脂部では減少する断続切削となり、切削面は摩擦材５が
バインダ樹脂６より突出した凹凸面となる。さらに、断
続切削はバイトの早期摩耗を促進するため、うねりを生
じるという問題があった。第２図は、このような状態を
誇張して示したものである。(Problems to be solved by the invention) However, as shown in FIG. 2, the friction surface 4a formed by cutting is cut with a cutting tool because the lining material 4 is composed of a hard friction material 5 and a soft binder resin 6. At that time, cutting resistance increases in the friction material portion and decreases in the binder resin portion, resulting in intermittent cutting, and the cutting surface becomes an uneven surface in which the friction material 5 projects from the binder resin 6. Further, the interrupted cutting promotes early wear of the cutting tool, which causes a problem that undulation occurs. FIG. 2 shows such a state in an exaggerated manner.
超音波モータは、振動体２の摩擦面2aと移動体３に接
着されたライニング材４の摩擦面4aの摩擦力で回転トル
クを得ているため、このような表面形状の摩擦面4aを有
するライニング材４を用いると、均一な接触状態が得ら
れず接触摩擦力が変化するため超音波モータの回転トル
クが不安定になるという問題があった。Since the ultrasonic motor obtains a rotational torque by the frictional force of the frictional surface 2a of the vibrating body 2 and the frictional surface 4a of the lining material 4 adhered to the moving body 3, it has a frictional surface 4a having such a surface shape. If the lining material 4 is used, a uniform contact state cannot be obtained, and the contact frictional force changes, which causes a problem that the rotational torque of the ultrasonic motor becomes unstable.
本発明の目的は、上記の課題を解決するもので、安定
した回転トルクが得られるランニング材にするための加
工方法を提供するものである。An object of the present invention is to solve the above problems and to provide a processing method for producing a running material that can obtain a stable rotation torque.
（課題を解決するための手段） 前記目的を達成するため、本発明は、一面上に圧電素
子が配設された振動体と、この振動体に励振される振幅
によって駆動される移動体とを備えた超音波モータに使
用され、硬い摩擦材および軟らかいバインダ樹脂によっ
て構成されて前記振動体と移動体間に介在されるライニ
ング材の加工方法において、ライニング材における前記
振動体との接触面を研削仕上げすることを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a vibrating body having a piezoelectric element arranged on one surface thereof, and a moving body driven by an amplitude excited by the vibrating body. In a method of processing a lining material used in an ultrasonic motor provided with the friction material and a soft binder resin and interposed between the vibrating body and the moving body, a contact surface of the lining material with the vibrating body is ground. It is characterized by finishing.
（作 用） 研削加工によれば、砥石は砥粒の自生作用により常に
新しい鋭い切刃が持続するので、安定した加工が行わ
れ、研削面は、摩擦材とバインダ樹脂が同一面で構成さ
れ、かつうねりのない平滑な摩擦面が得られる。従って
ライニング材の摩擦面は、振動体の摩擦面と密着した接
触が可能になり、圧電素子の励振により発生した振動体
の摩擦面の数ミクロンの楕円運動が、均一な接触摩擦力
としてライニング材の摩擦面に伝達され安定した回転ト
ルクが得られる。(Working) According to the grinding process, a new sharp cutting edge is constantly maintained by the self-generated action of the abrasive grains in the grinding stone, so stable processing is performed, and the grinding surface is composed of the friction material and the binder resin on the same surface. A smooth friction surface without waviness can be obtained. Therefore, the friction surface of the lining material can be in intimate contact with the friction surface of the vibrating body, and the elliptical movement of several microns on the friction surface of the vibrating body caused by the excitation of the piezoelectric element causes a uniform contact friction force as the lining material. Is transmitted to the friction surface of and stable rotation torque is obtained.
（実施例） 第１図は本発明の加工方法によって加工されたライニ
ング材を用いた超音波モータの断面図であり、移動体３
に接着されたライニング材４を研削加工して得られた摩
擦面4aが振動体２の摩擦面2aに押圧した状態を示してい
る。(Example) FIG. 1 is a cross-sectional view of an ultrasonic motor using a lining material processed by the processing method of the present invention.
The friction surface 4a obtained by grinding the lining material 4 adhered to is pressed against the friction surface 2a of the vibrating body 2.
ライニング材４の摩擦面4aは、摩擦材５とバインダ樹
脂６が同一面で構成され、かつうねりのない平滑面であ
る。従って、ライニング材４の摩擦面4aを、振動体２の
摩擦面2aに押圧したとき、両摩擦面4aおよび2aは隙間な
く密着する。The friction surface 4a of the lining material 4 is a smooth surface in which the friction material 5 and the binder resin 6 are formed on the same surface and has no waviness. Therefore, when the friction surface 4a of the lining material 4 is pressed against the friction surface 2a of the vibrating body 2, both friction surfaces 4a and 2a closely contact each other without a gap.
この状態で圧電素子１を励振し、振動体２の摩擦面2a
を数ミクロンの楕円運動状態にすると、その楕円運動が
ライニング材４の摩擦面4aに均一に伝達され、移動体３
は、安定した回転トルクが得られる。また、ライニング
材４の摩擦面4aは平滑面なので偏摩擦が生ぜず、従っ
て、超音波モータの長寿命化が可能になる。In this state, the piezoelectric element 1 is excited, and the friction surface 2a of the vibrating body 2
Is moved to an elliptical motion state of several microns, the elliptical motion is uniformly transmitted to the friction surface 4a of the lining material 4, and the moving body 3
Provides stable rotation torque. Further, since the friction surface 4a of the lining material 4 is a smooth surface, uneven friction does not occur, and therefore the life of the ultrasonic motor can be extended.
本実施例における研削仕上げされたライニング材４の
平面度は１μｍ以下であって、切削仕上げされたライニ
ング材における平面度の5.0μｍと比較して平滑に仕上
げることができ、切削仕上げしたライニング材を用いた
移動体を組み込んだ超音波モータが１時間で初期特性が
変化するのに対して、本実施例における研削仕上げした
ライニング材４を用いた移動体３を組み込んだ超音波モ
ータは、100時間以上初期特性が安定した。The flatness of the ground-finished lining material 4 in this example is 1 μm or less, and it can be finished smoother than the flatness of the cut-finished lining material of 5.0 μm. The ultrasonic motor incorporating the moving body used changes the initial characteristics in 1 hour, while the ultrasonic motor incorporating the moving body 3 using the lining material 4 that has been ground and finished in the present embodiment has 100 hours. The initial characteristics are stable.
（発明の効果） 以上説明したように、本発明の加工方法によって加工
されたライニング材を用いることによって、安定した回
転トルクで円滑に回転する長寿命の超音波モータが実現
する。(Effects of the Invention) As described above, by using the lining material processed by the processing method of the present invention, a long-life ultrasonic motor that smoothly rotates with stable rotation torque is realized.
第１図は本発明の加工方法によって加工されたライニン
グ材を用いた超音波モータの断面図、第２図は従来の超
音波モータの要部拡大断面図、第３図は従来の超音波モ
ータの一部を切断した斜視図である。 １……圧電素子、２……振動体、2a,4a……摩擦面、３
……移動体、４……ライニング材、５……摩擦材、６…
…バインダ樹脂。FIG. 1 is a sectional view of an ultrasonic motor using a lining material processed by the processing method of the present invention, FIG. 2 is an enlarged sectional view of an essential part of a conventional ultrasonic motor, and FIG. 3 is a conventional ultrasonic motor. It is the perspective view which cut a part of. 1 ... Piezoelectric element, 2 ... Vibrating body, 2a, 4a ... Friction surface, 3
...... Mobile unit, 4 lining material, 5 ...... friction material, 6 ...
… Binder resin.
Claims (1)
この振動体に励振される振幅によって駆動される移動体
とを備えた超音波モータに使用され、硬い摩擦材および
軟らかいバインダ樹脂によって構成されて前記振動体と
移動体間に介在されるライニング材の加工方法におい
て、ライニング材における前記振動体との接触面を研削
仕上げすることを特徴とする超音波モータに用いられる
ライニング材の加工方法。1. A vibrating body having a piezoelectric element arranged on one surface thereof,
Used in an ultrasonic motor provided with a moving body driven by an amplitude excited by the vibrating body, of a lining material formed of a hard friction material and a soft binder resin and interposed between the vibrating body and the moving body. A method of processing a lining material used for an ultrasonic motor, characterized in that the contact surface of the lining material with the vibrating body is ground and finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63114882A JP2551812B2 (en) | 1988-05-13 | 1988-05-13 | Processing method for lining materials used in ultrasonic motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63114882A JP2551812B2 (en) | 1988-05-13 | 1988-05-13 | Processing method for lining materials used in ultrasonic motors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01286783A JPH01286783A (en) | 1989-11-17 |
| JP2551812B2 true JP2551812B2 (en) | 1996-11-06 |
Family
ID=14649038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63114882A Expired - Lifetime JP2551812B2 (en) | 1988-05-13 | 1988-05-13 | Processing method for lining materials used in ultrasonic motors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2551812B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5772506B2 (en) | 2011-10-26 | 2015-09-02 | マックス株式会社 | Contact arm deformation prevention mechanism |
-
1988
- 1988-05-13 JP JP63114882A patent/JP2551812B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01286783A (en) | 1989-11-17 |
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