JPH01214272A - Piezoelectric motor - Google Patents
Piezoelectric motorInfo
- Publication number
- JPH01214272A JPH01214272A JP63038966A JP3896688A JPH01214272A JP H01214272 A JPH01214272 A JP H01214272A JP 63038966 A JP63038966 A JP 63038966A JP 3896688 A JP3896688 A JP 3896688A JP H01214272 A JPH01214272 A JP H01214272A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- driver
- piezoelectric
- housing
- base
- 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
- 230000008602 contraction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、回転駆動源として使用する圧電モータに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a piezoelectric motor used as a rotational drive source.
従来、回転駆動源として使用されるモータとしては、コ
イルに通電することにより発生する磁界による磁気的吸
引力を利用する！磁弐のものが知られている。Conventionally, motors used as rotational drive sources utilize the magnetic attraction force generated by the magnetic field generated by energizing a coil! Magnetic two are known.
ところが、この種電磁式のモータにおいては、コイルや
磁石を使用するものであるため、構造が複雑化し、全体
が重量化するばかりか２組み立てを煩雑にし、さらに電
磁波が悪影響を及ぼす精密電子機器中への組み込みには
適さないという問題があった。However, since this type of electromagnetic motor uses coils and magnets, it has a complex structure and is not only heavy, but also complicated to assemble, and it is difficult to use in precision electronic equipment where electromagnetic waves have a negative effect. There was a problem that it was not suitable for integration into.
本発明はこのような事情に鑑みなされたもので、間圧電
素子の伸縮動作の繰り返しによって回転駆動力を得るこ
とができ、もって上述した電磁式モータによる問題点を
一掃してなる新規な方式による圧電モータを提供するも
のである。The present invention was developed in view of the above circumstances, and is based on a novel system that can obtain rotational driving force by repeating the expansion and contraction motion of the piezoelectric element, thereby eliminating the problems caused by the electromagnetic motor described above. The present invention provides a piezoelectric motor.
本発明に係る圧電モータは、軸受ハウジング内に回動自
在に設けられ軸線方向に延在する基部およびこの基部の
側方に延在するアームを有する駆動体と、この駆動体と
同一の軸線上に回転自在に設けられ基部が対向する胴部
を有する回転体とを備え、この回転体と駆動体を連結可
能な第１の圧電素子を基部と胴部との間に設け、この圧
電素子の周波数と同一の周波数で伸縮する第２の圧電素
子を軸受ハウジングとアームとの間に設け、この第２の
圧電素子によって駆動体は回動力が付与され、かつスプ
リングによって復帰力が付与されているものである。A piezoelectric motor according to the present invention includes a drive body that is rotatably provided in a bearing housing and has a base that extends in the axial direction, an arm that extends to the side of the base, and a drive body that is disposed on the same axis as the drive body. a rotating body having a body that is rotatably disposed on the body and has a body facing the base; a first piezoelectric element capable of connecting the rotating body and the driving body is provided between the base and the body; A second piezoelectric element that expands and contracts at the same frequency as the frequency is provided between the bearing housing and the arm, and the second piezoelectric element applies rotational force to the driving body, and a spring applies a restoring force. It is something.
本発明においては、第１の圧電素子および第２の圧電素
子に同一の周波数をもつ電流を供給すると、間圧電素子
の伸長によって回転体と駆動体が連結すると共に、駆動
体がスプリングの弾撥力に抗して回動し、間圧電素子の
収縮によって回転体と駆動体が離間すると共に、駆動体
がスプリングの弾１８力によって初期位置に復帰する。In the present invention, when a current having the same frequency is supplied to the first piezoelectric element and the second piezoelectric element, the rotating body and the driving body are connected by the expansion of the piezoelectric elements, and the driving body is moved by the elastic force of the spring. The rotating body rotates against the force, and the rotating body and the driving body are separated by the contraction of the piezoelectric element, and the driving body is returned to its initial position by the elastic force of the spring.
〔実施例〕
以下、本発明の構成等を図に示す実施例によって詳細に
説明する。[Example] Hereinafter, the structure of the present invention will be explained in detail with reference to an example shown in the drawings.
第１図（ａ）および（ｂｌは第２図のａ−ａ線断面図と
ｂ−ｂ線断面図、第２図は本発明に係る圧電モータを示
す縦断面図である。同図において、符号１で示すものは
軸受２を有するハウジングで、全体が段状の有底筒体に
よって形成されており、中央底部には軸線方向に延在す
る固定軸３が一体に設けられている。また、このハウジ
ング１の内周面には、中心方向に開口する４つの凹溝４
が９０″間隔をもって設けられている。５は前記軸受２
を保持する環状の蓋体で、前記ハウジング１に開口部１
ａを閉塞するように設けられている。６はモータの駆動
体で、軸線方向に延在する基部６ａおよびこの基部６ａ
に放射状（基部６ａの側方）に設けられ前記凹溝４内に
先端部が臨むアーム６ｂからなり、前記ハウジング１内
の固定軸３に回動自在に設けられている。７はモータの
回転体で、前記基部６ａの一部が臨む胴部としてのフラ
ンジ付の有底筒７ａおよびこの有底筒７ａの中央部に設
けられた出力軸７ｂからなり、前記駆動体６と同一の軸
線上に位置し、前記ハウジング１に前記軸受・２を介し
て回転自在に設けられている。８は前記駆動体６と前記
回転体７を連結可能な第１の圧電素子で、前記基部６ａ
の周囲に９０″間隔をもって設けられており、前記ハウ
ジング１の径方向に伸縮するように構成されている。９
はこの圧電素子８と同一の周波数で伸縮する第２圧電素
子で、前記凹溝４の溝壁４ａに設けられており、前記駆
動体６に一方向の回動力を付与するように構成されてい
る。１０は前記駆動体６に復帰習性を付与するスプリン
グで、前記凹溝４の溝壁４ａと前記アーム６ｂとの間に
弾装されている。FIGS. 1(a) and (bl are a cross-sectional view taken along the a-a line and a cross-sectional view taken along the b-b line in FIG. 2, and FIG. 2 is a vertical cross-sectional view showing the piezoelectric motor according to the present invention. In the same figure, Reference numeral 1 denotes a housing having a bearing 2, which is entirely formed of a step-shaped cylinder with a bottom, and a fixed shaft 3 extending in the axial direction is integrally provided at the center bottom. , the inner peripheral surface of this housing 1 has four grooves 4 that open toward the center.
are provided at intervals of 90''. 5 is the bearing 2
an annular lid that holds an opening 1 in the housing 1;
It is provided to block a. Reference numeral 6 denotes a motor drive body, which includes a base 6a extending in the axial direction and a base 6a extending in the axial direction.
The arm 6b is provided radially (on the side of the base 6a) and has its tip facing into the groove 4, and is rotatably provided on the fixed shaft 3 in the housing 1. Reference numeral 7 denotes a rotary body of a motor, which is composed of a bottomed cylinder 7a with a flange serving as a body portion from which a part of the base 6a faces, and an output shaft 7b provided at the center of this bottomed cylinder 7a. It is located on the same axis as the housing 1 and is rotatably provided in the housing 1 via the bearing 2. Reference numeral 8 denotes a first piezoelectric element capable of connecting the driving body 6 and the rotary body 7, and the base portion 6a
are provided at intervals of 90'' around the periphery of the housing 1, and are configured to expand and contract in the radial direction of the housing 1.
is a second piezoelectric element that expands and contracts at the same frequency as this piezoelectric element 8, is provided in the groove wall 4a of the groove 4, and is configured to apply rotational force in one direction to the drive body 6. There is. Reference numeral 10 denotes a spring that imparts a return behavior to the driving body 6, and is elastically loaded between the groove wall 4a of the groove 4 and the arm 6b.
このように構成された圧電モータにおいては、第１の圧
電素子８および第２の圧電素子９に同一の周波数（同位
相）をもつ電流を供給すると、第３図（ａ）および（ｂ
）に示すように間圧電素子８．９が伸長して駆動体６と
回転体７が連結すると共に、駆動体６がスプリング１０
の弾撥力に抗して回動する。In the piezoelectric motor configured in this way, when currents having the same frequency (same phase) are supplied to the first piezoelectric element 8 and the second piezoelectric element 9, the results shown in FIGS. 3(a) and (b)
), the piezoelectric element 8.9 extends to connect the driving body 6 and the rotating body 7, and the driving body 6 is connected to the spring 10.
rotates against the repulsive force of.
一方、間圧電素子８，９が収縮すると、駆動体６と回転
体７が離間すると共に、駆動体６がスプリング１０の弾
１８力によって初期位置に復帰する。On the other hand, when the intervening piezoelectric elements 8 and 9 contract, the driving body 6 and the rotating body 7 are separated from each other, and the driving body 6 is returned to its initial position by the elastic force of the spring 10.
したがって、本発明においては、第１の圧電素子８およ
び第２の圧電素子９の伸縮動作の繰り返しによって一定
方向の回転駆動力を得ることができる。Therefore, in the present invention, rotational driving force in a fixed direction can be obtained by repeating the expansion and contraction operations of the first piezoelectric element 8 and the second piezoelectric element 9.
なお、本発明おける圧電モータの各部品の形状や個数は
前述した実施例に限定されず、例えば使用機器等に応じ
て適宜変形、変更することは自由である。Note that the shape and number of each component of the piezoelectric motor in the present invention are not limited to the above-described embodiments, and may be modified or changed as appropriate depending on, for example, the equipment used.
以上説明したように本発明によれば、軸受ハウジング内
に回動自在に設けられ軸線方向に延在する基部およびこ
の基部の側方に延在するアームを有する駆動体と、この
駆動体と同一の軸線上に回転自在に設けられ基部が対向
する胴部を有する回転体とを備え、この回転体と駆動体
を連結可能な第１の圧電素子を基部と胴部との間に設け
、この第１の圧電素子の周波数と同一の周波数で伸縮す
る第２の圧電素子を軸受ハウジングとアームとの間に設
け、この第２品圧電素子によって駆動体は回動力が付与
され、かつスプリングによって復帰力が付与されている
ので、第１の圧電素子および第２の圧電素子に同一の周
波数をもつ電流を供給すると、両圧電素子の伸長によっ
て回転体と駆動体が連結すると共に、駆動体がスプリン
グの弾１８力に抗して回動し、また両圧電素子が収縮す
ると回転体と駆動体が離間すると共に、駆動体がスプリ
ングの弾↑ロカによって初期位置に復帰することになる
。したがって、両圧電素子の伸縮動作の繰り返しによっ
て回転駆動力を得ることができるから、従来の電磁式モ
ータと比較して構造の簡素化。As explained above, according to the present invention, there is provided a drive body that is rotatably provided in a bearing housing and has a base that extends in the axial direction and an arm that extends to the side of the base, and a drive body that is identical to the drive body. a rotating body that is rotatably provided on the axis of the rotor and has a body that faces the base; a first piezoelectric element that can connect the rotating body and the driving body is provided between the base and the body; A second piezoelectric element that expands and contracts at the same frequency as the first piezoelectric element is provided between the bearing housing and the arm, and the second piezoelectric element applies rotational force to the drive body, and the spring returns the drive body. Since a force is applied, when a current with the same frequency is supplied to the first piezoelectric element and the second piezoelectric element, the rotating body and the driving body are connected by the expansion of both piezoelectric elements, and the driving body is moved by the spring. The rotating body rotates against the force of the bullet 18, and when both piezoelectric elements contract, the rotating body and the driving body are separated from each other, and the driving body is returned to its initial position by the upward movement of the spring. Therefore, rotational driving force can be obtained by repeating the expansion and contraction operations of both piezoelectric elements, which simplifies the structure compared to conventional electromagnetic motors.
全体の軽量化および組立作業の簡素化を図ることができ
る。また、本発明は、磁界の発生によって回転駆動力を
得るものではないから、電磁波が悪影響を及ぼす精密電
子機器中への組み込みに適用してきわめて有効である。The overall weight can be reduced and assembly work can be simplified. Further, since the present invention does not obtain rotational driving force by generating a magnetic field, it is extremely effective when applied to precision electronic equipment where electromagnetic waves have an adverse effect.
第１図（ａｌおよび伽）は第２図のａ−ａ線断面図とｂ
−ｂ線断面図、第２図は本発明に係る圧電モータを示す
縦断面図、第３図（ａ）および（ｂｌは同じく圧電モー
タの使用状態を示す断面図である。
１ ・・・・ハウジング、６ ・・・・駆動体、６ａ・
・・・基部、６ｂ・・・・アーム、７ ・・・・回転体
、７ａ・・・・有底筒、８ ・・・・第１の圧電素子、
９ ・・・・第２の圧電素子、１０・・・・スプリング
。
特許出願人 日本電気株式会社Figure 1 (al and ka) is a sectional view taken along line a-a in Figure 2 and b.
2 is a longitudinal sectional view showing the piezoelectric motor according to the present invention, and FIGS. 3(a) and 3(b) are sectional views showing the piezoelectric motor in use. Housing, 6...Driver, 6a.
...base, 6b...arm, 7...rotating body, 7a...bottomed tube, 8...first piezoelectric element,
9...Second piezoelectric element, 10...Spring. Patent applicant: NEC Corporation
Claims (1)
在する基部およびこの基部の側方に延在するアームを有
する駆動体と、この駆動体と同一の軸線上に回転自在に
設けられ前記基部が対向する胴部を有する回転体とを備
え、この回転体と前記駆動体を連結可能な第１の圧電素
子を前記胴部と前記基部との間に設け、この圧電素子の
周波数と同一の周波数で伸縮する第２の圧電素子を前記
軸受ハウジングと前記アームとの間に設け、この圧電素
子によって前記駆動体は回動力が付与され、かつスプリ
ングによって復帰力が付与されていることを特徴とする
圧電モータ。a driving body rotatably provided within a bearing housing and having a base extending in the axial direction and an arm extending laterally of the base; and a driving body rotatably provided on the same axis as the driving body. a rotating body having a body portion facing each other, a first piezoelectric element capable of connecting the rotating body and the driving body is provided between the body portion and the base portion, and a first piezoelectric element capable of connecting the rotating body and the driving body is provided between the body portion and the base portion; A second piezoelectric element that expands and contracts with frequency is provided between the bearing housing and the arm, and the piezoelectric element applies rotational force to the drive body, and a spring applies a return force. piezoelectric motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038966A JPH01214272A (en) | 1988-02-22 | 1988-02-22 | Piezoelectric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038966A JPH01214272A (en) | 1988-02-22 | 1988-02-22 | Piezoelectric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01214272A true JPH01214272A (en) | 1989-08-28 |
Family
ID=12539902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63038966A Pending JPH01214272A (en) | 1988-02-22 | 1988-02-22 | Piezoelectric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01214272A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995004378A1 (en) * | 1993-08-02 | 1995-02-09 | Bonneville Scientific Incorporated | Direct drive field actuator motors |
| US6849989B2 (en) * | 2002-10-31 | 2005-02-01 | Andreas Schmid | Translation and rotation positioning motor |
-
1988
- 1988-02-22 JP JP63038966A patent/JPH01214272A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995004378A1 (en) * | 1993-08-02 | 1995-02-09 | Bonneville Scientific Incorporated | Direct drive field actuator motors |
| US5432395A (en) * | 1993-08-02 | 1995-07-11 | Bonneville Scientific Incorporated | Direct-drive field actuator motors |
| US6849989B2 (en) * | 2002-10-31 | 2005-02-01 | Andreas Schmid | Translation and rotation positioning motor |
| US7071595B2 (en) * | 2002-10-31 | 2006-07-04 | Sandia National Laboratories | Translation and rotation positioning motor |
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