JPH0132747Y2 - - Google Patents
Info
- Publication number
- JPH0132747Y2 JPH0132747Y2 JP1982066100U JP6610082U JPH0132747Y2 JP H0132747 Y2 JPH0132747 Y2 JP H0132747Y2 JP 1982066100 U JP1982066100 U JP 1982066100U JP 6610082 U JP6610082 U JP 6610082U JP H0132747 Y2 JPH0132747 Y2 JP H0132747Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical
- piezoelectric
- piezoelectric ceramic
- cylindrical piezoelectric
- collar
- 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
Links
- 239000000919 ceramic Substances 0.000 claims description 36
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【考案の詳細な説明】
本考案は、複数個の直径の異なる円筒形圧電磁
器と円筒形非圧電体とを使用した円筒型圧電駆動
体に関するものである。[Detailed Description of the Invention] The present invention relates to a cylindrical piezoelectric drive body using a plurality of cylindrical piezoelectric ceramics having different diameters and a cylindrical non-piezoelectric body.
一般に、圧電磁器で構成された圧電バイモルフ
は、その屈曲モードを利用すると、比較的低い電
圧で大きな変位が得られるために、スピーカーや
リレーに用いられている。 In general, piezoelectric bimorphs made of piezoelectric ceramics are used in speakers and relays because their bending mode allows large displacements to be obtained with relatively low voltage.
本考案は、上記の点を考慮して、複数個の直径
の異なる円筒の圧電磁器と、それぞれ両端の内外
面からつばを突出させ、直径の異なる複数の円筒
形非圧電体を交互にを同心上に配列し、圧電磁器
の端部を交互に円筒形非圧電体に連結することを
特徴とし、その目的は大きな変位が得られ、長さ
方向に小さな形状を持つ円筒型圧電駆動体を提供
するものである。以下、図面により実施例を詳細
に説明する。 In consideration of the above points, the present invention consists of a plurality of cylindrical piezoelectric ceramics with different diameters, and a plurality of cylindrical non-piezoelectric bodies with different diameters, each having a collar protruding from the inner and outer surfaces of both ends, and concentrically arranged in an alternating manner. The piezoelectric actuators are arranged on the top and the ends of the piezoelectric ceramics are alternately connected to the cylindrical non-piezoelectric body, the purpose of which is to provide a cylindrical piezoelectric drive body that can obtain a large displacement and has a small shape in the length direction. It is something to do. Hereinafter, embodiments will be described in detail with reference to the drawings.
第１図及び第２図は、本考案の一実施例の平面
図及び断面図を示したもので、チタン酸ジルコン
酸鉛等の圧電磁器材料からなる円筒形圧電磁器１
の内外面に電極１ａ，１ｂが設けられて分極処理
が施され、またこの円筒形圧電磁器１の内面側
に、これと微少間隙をあけて円筒形非圧電体円２
が配列され、この円筒形非圧電体２の一方の端面
に外側に突出するつば２ａが設けられ、円筒型圧
電磁器１の一方の端面がこのつば２ａに接着材で
接合され、他方の端面には内側に突出したつば２
ｂが設けられている。また、この円筒形非圧電体
２の内面側に、これと微少間隙をあけて円筒型圧
電磁器３が設けられ、この円筒型圧電磁器３は円
筒型圧電磁器１と同様に内外面に電極３ａ，３ｂ
が設けられて分極が施されており、円筒型圧電磁
器３の端面は円筒形非圧電体２のつば２ｂに接着
材で接合されている。更に、円筒型圧電磁器３の
内面側に微少間隙をあけて円筒形非圧電体４が設
けられ、この円筒形非圧電体４の一方の端面に外
側に突出したつば４ａが設けられ、このつば４ａ
に円筒型圧電磁器３の他方の端面が接着材で接合
され、また円筒形非圧電体４の端面に内側に突出
するつばが設けられている。また円筒形非圧電体
４の内面側に、これと微少間隙をあけて円筒型圧
電磁器５が設けられ、この円筒型圧電磁器５の一
方の端面は円筒形非圧電体４の他方のつば４ｂに
接着材で接合されている。 1 and 2 show a plan view and a sectional view of an embodiment of the present invention, in which a cylindrical piezoelectric ceramic 1 made of a piezoelectric ceramic material such as lead zirconate titanate
Electrodes 1a and 1b are provided on the inner and outer surfaces of the cylindrical piezoelectric ceramic 1 for polarization, and a cylindrical non-piezoelectric circle 2 is provided on the inner surface of the cylindrical piezoelectric ceramic 1 with a slight gap therebetween.
are arranged, a collar 2a projecting outward is provided on one end surface of the cylindrical non-piezoelectric body 2, one end surface of the cylindrical piezoelectric ceramic 1 is bonded to this collar 2a with an adhesive, and a collar 2a is provided on the other end surface. The brim 2 protrudes inward.
b is provided. Further, a cylindrical piezoelectric ceramic 3 is provided on the inner surface of this cylindrical non-piezoelectric body 2 with a slight gap therebetween, and like the cylindrical piezoelectric ceramic 1, this cylindrical piezoelectric ceramic 3 has electrodes 3a on its inner and outer surfaces. ,3b
is provided and polarized, and the end face of the cylindrical piezoelectric ceramic 3 is joined to the collar 2b of the cylindrical non-piezoelectric body 2 with an adhesive. Further, a cylindrical non-piezoelectric body 4 is provided on the inner surface of the cylindrical piezoelectric ceramic 3 with a slight gap therebetween, and a collar 4a that protrudes outward is provided on one end surface of this cylindrical non-piezoelectric body 4. 4a
The other end surface of the cylindrical piezoelectric ceramic 3 is bonded to the cylindrical piezoelectric ceramic 3 with an adhesive, and the end surface of the cylindrical non-piezoelectric body 4 is provided with a collar that projects inward. Further, a cylindrical piezoelectric ceramic 5 is provided on the inner surface side of the cylindrical non-piezoelectric body 4 with a slight gap therebetween, and one end surface of this cylindrical piezoelectric ceramic 5 is connected to the other rib 4b of the cylindrical non-piezoelectric body 4. are joined with adhesive.
このように、同心上に配列され、隣接した円筒
形圧電磁器の端面と円筒形非圧電体のつばを交互
に連結したものは、機械振動的には、円筒形圧電
磁器の軸方向にたいして直列結合となる。従つ
て、円筒形圧電磁器１の遊端部６を固定し、円筒
形圧電磁器５の遊端部７に駆動部を設け、たとえ
ば第２図に示したように、円筒形圧電磁器１，
３，５の分極極性が同じになるように、電極１
ａ，３ａ，５ａと電極１ｂ，３ｂ，５ｂに直流電
圧を印加すると、結合された円筒形圧電磁器１，
３，５は同方向に伸びるが、結合された円筒形非
圧電体２，４は伸びないため、全体として円筒型
圧電磁器の個数に比例した変位量が得られる。 In this way, when the end faces of adjacent cylindrical piezoelectric ceramics are arranged concentrically and the ribs of the cylindrical non-piezoelectric body are alternately connected, in terms of mechanical vibration, it is a series coupling in the axial direction of the cylindrical piezoelectric ceramics. becomes. Therefore, the free end 6 of the cylindrical piezoelectric ceramic 1 is fixed, and the free end 7 of the cylindrical piezoelectric ceramic 5 is provided with a driving section, for example, as shown in FIG. 2, the cylindrical piezoelectric ceramic 1,
Electrode 1 so that the polarization properties of electrodes 3 and 5 are the same
When a DC voltage is applied to the electrodes 1b, 3b, and 5a, the coupled cylindrical piezoelectric ceramics 1,
3 and 5 extend in the same direction, but the combined cylindrical non-piezoelectric bodies 2 and 4 do not extend, so that an overall displacement proportional to the number of cylindrical piezoelectric ceramics can be obtained.
即ち、円筒型圧電磁器１，３，５の長さをそれ
ぞれL1，L2，L3、とし、同一電圧をかけたとき
の伸びを含めた長さをL′1，L′2，L′3とすると
△Ｌ＝（L′1−L1）＋（L′2−L2）＋（L′3−L3）
L1＝L2＝L3，L′1＝L′2＝L′3
∴△Ｌ＝３（L′1−L1）
となる。従つて、円筒型圧電磁器の個数に比例し
た変位が得られるので、機械の微調整源として利
用することができる。 That is, the lengths of the cylindrical piezoelectric ceramics 1, 3, and 5 are respectively L 1 , L 2 , and L 3 , and the lengths including the elongation when the same voltage is applied are L′ 1 , L′ 2 , and L . ′ 3 , △L=(L′ 1 −L 1 )+(L′ 2 −L 2 )+(L′ 3 −L 3 ) L 1 =L 2 =L 3 , L′ 1 =L′ 2 = L′ 3 ∴△L=3(L′ 1 −L 1 ). Therefore, since a displacement proportional to the number of cylindrical piezoelectric ceramics can be obtained, it can be used as a source for fine adjustment of machines.
また、それぞれの円筒形圧電磁器１，３，５に
分極処理を施し、それぞれの長さをλ／２長に選
んで交番電圧を印加すると、その共振周波数で最
大振幅が励起されるため、円筒形圧電磁器の駆動
部７に設けられた駆動体は円筒軸の方向に交番振
動をするので、ワイヤの摩耗やスプリングの疲労
試験に適用することができる。但し、この場合
は、円筒型圧電磁器の高さ方向の共振周波数で円
筒形非圧電体が共振しないように音速の異なる材
質を用いる。 Furthermore, when each of the cylindrical piezoelectric ceramics 1, 3, and 5 is polarized, and the length of each is selected to be λ/2 length and an alternating voltage is applied, the maximum amplitude is excited at the resonant frequency, so that the cylindrical piezoelectric ceramics 1, 3, and 5 are Since the drive body provided in the piezoelectric ceramic drive unit 7 vibrates alternately in the direction of the cylindrical axis, it can be applied to wire wear and spring fatigue tests. However, in this case, materials with different sound velocities are used so that the cylindrical non-piezoelectric body does not resonate at the resonant frequency in the height direction of the cylindrical piezoelectric ceramic.
なお、上記実施例の円筒形非圧電体は一方の端
面に内側に突出するつばを設け、他方の端面に外
側に突出するつばを設けたが、つばの代わりに円
筒型圧電磁器と円筒形非圧電体の端面を接続する
リング状非圧電体を使用してもよい。 The cylindrical non-piezoelectric body in the above embodiment had a collar protruding inward on one end face and a collar protruding outward on the other end face, but instead of the collar, a cylindrical piezoelectric ceramic and a cylindrical non-piezoelectric body were used. A ring-shaped non-piezoelectric body may be used to connect the end faces of the piezoelectric body.
以上説明したように、本考案によれば、円筒形
圧電磁器の複数個と円筒形非圧電体の複数個を同
心上に交互に縦列接合することにより、円筒軸方
向の長さを短くできるために、単一径の円筒形圧
電磁器を用いた物よりもコンパクトにでき、固定
部よりも駆動部のほうが径が小さくなるため、振
幅も大きくとれるので、その応用範囲も広く、実
用的利益が大きいという利点がある。 As explained above, according to the present invention, by concentrically joining a plurality of cylindrical piezoelectric ceramics and a plurality of cylindrical non-piezoelectric bodies alternately in tandem, the length in the axial direction of the cylinder can be shortened. In addition, it is more compact than a device using a cylindrical piezoelectric ceramic with a single diameter, and since the diameter of the driving part is smaller than that of the fixed part, the amplitude can be increased, so its range of applications is wide, and it has practical benefits. It has the advantage of being large.
第１図は、本考案の一実施例の平面図、第２図
は、第１図の断面図である。
１，３，５……円筒形圧電磁器、１ａ，１ｂ，
３ａ，３ｂ，５ａ，５ｂ……電極、２，４……円
筒形非圧電体、２ａ，２ｂ，４ａ，４ｂ……つ
ば、６……遊端部、７……駆動部。
FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view of FIG. 1. 1, 3, 5... Cylindrical piezoelectric ceramic, 1a, 1b,
3a, 3b, 5a, 5b... electrode, 2, 4... cylindrical non-piezoelectric body, 2a, 2b, 4a, 4b... collar, 6... free end, 7... drive section.
Claims (1)
た直径の異なる複数個の円筒形圧電磁器と、それ
ぞれ両端から内側及び外側につばを突出させた直
径の異なる複数の円筒形非圧電体とを交互に同心
上に配列し、前記つばに前記円筒型圧電磁器がそ
れぞれ交互に連結されて、全体が機械的に直列に
結合された構造をもつことを特徴とする円筒型圧
電駆動体。 A plurality of cylindrical piezoelectric ceramics of different diameters each having electrodes on the inner and outer surfaces and polarized, and a plurality of cylindrical non-piezoelectric bodies of different diameters each having a rib protruding inwardly and outwardly from both ends. 1. A cylindrical piezoelectric drive body characterized in that the cylindrical piezoelectric ceramics are arranged concentrically and alternately connected to the ribs, and the whole is mechanically connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982066100U JPS58168156U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982066100U JPS58168156U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168156U JPS58168156U (en) | 1983-11-09 |
| JPH0132747Y2 true JPH0132747Y2 (en) | 1989-10-05 |
Family
ID=30075999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982066100U Granted JPS58168156U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168156U (en) |
-
1982
- 1982-05-06 JP JP1982066100U patent/JPS58168156U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168156U (en) | 1983-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4593160A (en) | Piezoelectric speaker | |
| US4812697A (en) | Ultrasonic vibrator and a method of controllingly driving same | |
| US7911112B2 (en) | Ultrasonic actuator | |
| JP4069160B2 (en) | Ultrasonic actuator | |
| JP4119903B2 (en) | Flat plate piezoelectric ultrasonic motor | |
| JPH0132747Y2 (en) | ||
| JPS62239875A (en) | Drive control method for ultrasonic vibrator | |
| JPS62225182A (en) | Oscillatory wave motor | |
| JPS6412111B2 (en) | ||
| JPH029561Y2 (en) | ||
| JPS62203570A (en) | Ultrasonic motor | |
| JP2568707B2 (en) | Ultrasonic motor | |
| JP3122882B2 (en) | Ultrasonic motor | |
| JPH0132748Y2 (en) | ||
| JPS6185076A (en) | Vibration wave ring motor | |
| JP2816851B2 (en) | Piezoelectric torsional displacement element, piezoelectric expansion / contraction displacement element, and piezoelectric composite displacement element | |
| JPS63283475A (en) | Ultrasonic motor | |
| JPH0624262B2 (en) | Transverse bending type vibrator | |
| JP2651824B2 (en) | Vertical effect bimorph device and driving method thereof | |
| JPH0522966A (en) | Ultrasonic motor | |
| JPH08163879A (en) | Ultrasonic oscillator and ultrasonic motor | |
| JPH0522964A (en) | Ultrasonic motor | |
| JPH0336972A (en) | Ultrasonic motor | |
| JP2626162B2 (en) | Ultrasonic motor | |
| JPS62155782A (en) | Ultrasonic vibrator and drive control method thereof |