JPS63217983A - Ultrasonic driving device - Google Patents
Ultrasonic driving deviceInfo
- Publication number
- JPS63217983A JPS63217983A JP62048516A JP4851687A JPS63217983A JP S63217983 A JPS63217983 A JP S63217983A JP 62048516 A JP62048516 A JP 62048516A JP 4851687 A JP4851687 A JP 4851687A JP S63217983 A JPS63217983 A JP S63217983A
- Authority
- JP
- Japan
- Prior art keywords
- traveling wave
- piezoelectric vibrator
- long metal
- vibrator
- central axis
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- 230000005684 electric field Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
- H02N2/001—Driving devices, e.g. vibrators
- H02N2/003—Driving devices, e.g. vibrators using longitudinal or radial modes combined with bending modes
- H02N2/0035—Cylindrical vibrators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/026—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors by pressing one or more vibrators against the driven body
Abstract
Description
【発明の詳細な説明】
髪策五塵秤１氷乱
本発明は、金属端面に発生する進行波によって被駆動体
を駆動する超音波駆動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic drive device that drives a driven body by a traveling wave generated on a metal end face.
鴛】０１折
現在提案されている超音波モータは、円環形圧電セラミ
ックの片面に２組の電極群を接着し、それぞれの電極群
によって励振される定在波が位置的に９０″ずれるよう
に電極を配置し、さらにこれら２組の電極群に印加する
交流電界が時間的に９０″位相差がある２組の発振器を
それぞれ接続している（特、開昭５８−１４８６８２号
公報参照）。The ultrasonic motor currently proposed in 2001 has two sets of electrode groups glued to one side of a circular piezoelectric ceramic, so that the standing waves excited by each electrode group are shifted by 90'' in position. Electrodes are arranged, and two sets of oscillators are connected to each other so that the alternating current electric fields applied to these two sets of electrode groups have a temporal phase difference of 90'' (see Japanese Patent Publication No. 148682/1982).
このように構成した従来の超音波モータは、２組の発振
器からそれぞれの電極群に交流電界を印加することによ
って円環形圧電セラミックの周囲の表面に９０″位相が
ずれた２つの定在波が発生し、この２の定在波が合成さ
れた進行波が発生する。従って、円環形圧電セラミック
の上に接着された櫛形の振動体の上に円環形の移動体を
載置して接触を強くすると、移動体が進行波によって移
動される。The conventional ultrasonic motor configured in this way generates two standing waves with a phase shift of 90'' on the surface around the annular piezoelectric ceramic by applying an alternating electric field from two sets of oscillators to each electrode group. A traveling wave is generated by combining these two standing waves.Therefore, an annular moving body is placed on the comb-shaped vibrating body bonded on the annular piezoelectric ceramic and brought into contact with it. If it is strong, the moving object will be moved by the traveling wave.
■が 決しようとする間 色 しかしながら、この従来の超音波モータでは。■While trying to decide the color However, with this conventional ultrasonic motor.
複数の電極と、これらの電極に交流電界を印加する２組
の発振器が必要であり、電極の構成が複雑で、また振動
体の構成も複雑であり、コストが高くなるという問題が
あった。This method requires a plurality of electrodes and two sets of oscillators for applying an alternating current electric field to these electrodes, and the structure of the electrodes is complicated, as is the structure of the vibrating body, which raises the problem of high cost.
問題点を 決するための手段
本発明は、上記問題点を解決するために、非対称型ラン
ジュバン型圧電体振動子であって、該圧電体振動子の長
大金属部の一部を、該長大金属部の中心軸からその中心
軸が僅かにずれるように形成し、上記圧電体振動子の厚
み方向の振動とたわみ振動との合成により、上記長大金
属部の端面において一方向に向う進行波を発生させ、上
記長大金属部の端面に被駆動体を接触させて動力を得る
ことを特徴とする。Means for Solving the Problems In order to solve the above problems, the present invention provides an asymmetric Langevin type piezoelectric vibrator, in which a part of the long metal part of the piezoelectric vibrator is replaced by a part of the long metal part. The piezoelectric vibrator is formed so that its central axis is slightly offset from the central axis of the piezoelectric vibrator, and by combining the vibration in the thickness direction and the flexural vibration of the piezoelectric vibrator, a traveling wave directed in one direction is generated at the end face of the long metal part. , characterized in that power is obtained by bringing a driven body into contact with the end face of the long metal part.
務■
本発明によれば、ランジュバン型圧電型振動子の長大金
属部部の一部を、長大金属部の中心軸からその中心軸が
僅かにずれたずれるように構成して、圧電体に交流電界
を印加すると、長大金属部の端面で一方向に移動する表
面変移の進行波が発生するので、この進行波により被駆
動体を効率良く駆動することができる。■According to the present invention, a part of the long metal part of the Langevin piezoelectric vibrator is configured so that its central axis is slightly shifted from the central axis of the long metal part, so that the piezoelectric body receives an alternating current. When an electric field is applied, a traveling wave of surface displacement that moves in one direction is generated at the end face of the long metal part, so that the driven body can be efficiently driven by this traveling wave.
実施例
第１図は、本発明の１実施例の圧電体振動子の斜視図、
第２図は、第１図の圧電体振動子の側面図で、入力端子
３．４を持つ２個の圧電体１．２を２つのアルミニウム
等の長大金属円柱５と金属円柱６で挟持固着し、一方の
長大金属円柱５の一部７を、その中心軸か長大金属部部
５の中心軸から僅かにずれるように構成する。なお、こ
の一部の金属部７は長大金属部５と一体の金属から削り
出したものでもよいし、また別体の金属を接着または固
着したものでもよい。また、長大金属部円柱５は角柱で
もよい。Embodiment FIG. 1 is a perspective view of a piezoelectric vibrator according to an embodiment of the present invention.
FIG. 2 is a side view of the piezoelectric vibrator shown in FIG. 1, in which two piezoelectric bodies 1.2 having input terminals 3.4 are sandwiched and fixed between two long metal cylinders 5 and 6, such as aluminum. However, a portion 7 of one of the long metal cylinders 5 is constructed so that its central axis is slightly shifted from the central axis of the long metal portion 5. Note that this part of the metal portion 7 may be carved from a metal that is integrated with the long metal portion 5, or may be a separate piece of metal that is bonded or fixed. Moreover, the long metal part cylinder 5 may be a prismatic pillar.
このように構成した圧電体振動子８の入力端子に発振器
から交流電界を印加すると、圧電体振動子８及び長大金
属部５の縦振動及びたわみ振動の合成により長大金属部
５の一部７の端面に矢印Ａ方向に表面変位の進行波が発
生することが認められた。When an alternating current electric field is applied from an oscillator to the input terminal of the piezoelectric vibrator 8 configured as described above, the longitudinal vibration and the flexural vibration of the piezoelectric vibrator 8 and the long metal part 5 are combined, so that the part 7 of the long metal part 5 is It was observed that a traveling wave of surface displacement was generated on the end face in the direction of arrow A.
第３図は、圧電体振動子の進行波を利用した本発明の実
施例の超音波駆動装置の斜視図で、圧電体振動子８の端
面に被駆動体９を接触させると、圧電体振動子８に矢印
Ａ方向に進行波が発生していると、この進行波に押され
て被駆動体９は同方向の矢印Ｂの方向へ移動する。FIG. 3 is a perspective view of an ultrasonic driving device according to an embodiment of the present invention that utilizes traveling waves of a piezoelectric vibrator. When a traveling wave is generated in the child 8 in the direction of arrow A, the driven body 9 is pushed by this traveling wave and moves in the same direction as arrow B.
従って、この構成はりニアモータとして構成することが
できる。Therefore, this configuration can be configured as a linear motor.
第４図は、圧電体振動子の進行波を利用した本発明の他
の実施例の超音波駆動装置の斜視図で、ベアリング等で
支持された回転軸１ｏに固着された円板１１に１個また
は複数個の圧電体振動子８を接触させる。この場合、圧
電体振動子８の進行波Ａは円板１１の中心を通る放射方
向の線に対して直交するように設ける。FIG. 4 is a perspective view of an ultrasonic driving device according to another embodiment of the present invention that uses traveling waves of a piezoelectric vibrator. or a plurality of piezoelectric vibrators 8 are brought into contact with each other. In this case, the traveling wave A of the piezoelectric vibrator 8 is provided so as to be orthogonal to a line in the radial direction passing through the center of the disk 11.
このように構成した本実施例の超音波駆動装置では、圧
電体振動子８の矢印入方向の進行波によって円板１１が
矢印Ｂ方向に回転するため、超音波モータとして構成す
ることができる。In the ultrasonic drive device of this embodiment configured in this manner, the disk 11 is rotated in the direction of arrow B by the traveling wave of the piezoelectric vibrator 8 in the direction of the arrow B, so that it can be configured as an ultrasonic motor.
なお、上記実施例において、圧電体振動子８の端面と被
駆動体９，１１との接触を強固にするため。In the above embodiment, this is done to strengthen the contact between the end face of the piezoelectric vibrator 8 and the driven bodies 9 and 11.
圧電体振動子８を押圧す、るバネ押圧部材または圧電体
振動子８と対向する被駆動体９の部分を押圧するバネ抑
圧部材を設ける。A spring pressing member that presses the piezoelectric vibrator 8 or a spring suppressing member that presses a portion of the driven body 9 that faces the piezoelectric vibrator 8 is provided.
叉里勿麦米
以上の説明から明らかなように１本発明は、非対称型ラ
ンジュバン型圧電型振動子の長大金属部の一部の中心軸
が長大金属部の中心軸がら僅かに中心軸がずれるように
構成して、圧電体に交流電界を印加すると、長大金属部
の端面で一方向に移動する表面変移の進行波が発生する
ので、この進行波により被駆動体を効率良く駆動するこ
とができ、また、構成が簡単で、製造が容易で、コスト
を安くすることができるばかりでなく、トルクを大きく
取ることができる超音波駆動装置を提供することができ
るという利点がある。As is clear from the above description, the present invention provides an asymmetrical Langevin piezoelectric vibrator in which the central axis of a part of the long metal part is slightly offset from the central axis of the long metal part. When an alternating current electric field is applied to the piezoelectric body with this configuration, a traveling wave of surface displacement that moves in one direction is generated at the end face of the long metal part, so that the driven body can be efficiently driven by this traveling wave. Furthermore, there are advantages in that it is possible to provide an ultrasonic drive device that not only has a simple configuration, is easy to manufacture, and can be manufactured at low cost, but also can generate a large amount of torque.
第１図は本発明の圧電体振動子の斜視図、第２図は第１
図の側面図、第３図の本発明の１実施例の駆動装置の概
略斜視図、第４図は本発明の他の実施例の超音波駆動装
置の概略斜視図である。
１．２・・・圧電素子、３，４・・・入力端子、５・・
・長大金翼部、６・・・金属円柱、７・・・長大金属部
の一部、８・・・圧電体振動子、９・・・被駆動体、１
０・・・回転軸、１１・・・円板。FIG. 1 is a perspective view of the piezoelectric vibrator of the present invention, and FIG.
FIG. 3 is a schematic perspective view of a driving device according to one embodiment of the present invention, and FIG. 4 is a schematic perspective view of an ultrasonic driving device according to another embodiment of the present invention. 1.2...Piezoelectric element, 3,4...Input terminal, 5...
・Long metal wing part, 6... Metal cylinder, 7... Part of the long metal part, 8... Piezoelectric vibrator, 9... Driven body, 1
0... Rotation axis, 11... Disk.
Claims (2)
該圧電体振動子の長大金属部の一部を、該長大金属部の
中心軸からその中心軸が僅かにずれるように形成し、上
記圧電体振動子の厚み方向の振動とたわみ振動との合成
により、上記長大金属部の端面において一方向に向う進
行波を発生させ、上記長大金属部の端面に被駆動体を組
合わせて動力を得ることを特徴とする超音波駆動装置。(1) An asymmetric Langevin type piezoelectric vibrator,
A part of the long metal part of the piezoelectric vibrator is formed so that its central axis is slightly offset from the central axis of the long metal part, and the vibration in the thickness direction and the flexural vibration of the piezoelectric vibrator are synthesized. An ultrasonic driving device characterized in that a traveling wave traveling in one direction is generated on the end face of the long metal part, and a driven body is combined with the end face of the long metal part to obtain power.
体に接触させたことを特徴とする特許請求の範囲第１項
記載の超音波駆動装置。(2) The ultrasonic driving device according to claim 1, wherein one or more of the piezoelectric vibrators are brought into contact with the driven body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62048516A JPS63217983A (en) | 1987-03-02 | 1987-03-02 | Ultrasonic driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62048516A JPS63217983A (en) | 1987-03-02 | 1987-03-02 | Ultrasonic driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63217983A true JPS63217983A (en) | 1988-09-12 |
Family
ID=12805530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62048516A Pending JPS63217983A (en) | 1987-03-02 | 1987-03-02 | Ultrasonic driving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63217983A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284083A (en) * | 1988-09-20 | 1990-03-26 | Olympus Optical Co Ltd | Ultrasonic wave actuator and driving gear using same |
| US5143222A (en) * | 1988-11-14 | 1992-09-01 | Russell Finex Limited | Sieving apparatus |
-
1987
- 1987-03-02 JP JP62048516A patent/JPS63217983A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284083A (en) * | 1988-09-20 | 1990-03-26 | Olympus Optical Co Ltd | Ultrasonic wave actuator and driving gear using same |
| US5143222A (en) * | 1988-11-14 | 1992-09-01 | Russell Finex Limited | Sieving apparatus |
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