JPS631381A - Ultrasonic motor - Google Patents
Ultrasonic motorInfo
- Publication number
- JPS631381A JPS631381A JP61141961A JP14196186A JPS631381A JP S631381 A JPS631381 A JP S631381A JP 61141961 A JP61141961 A JP 61141961A JP 14196186 A JP14196186 A JP 14196186A JP S631381 A JPS631381 A JP S631381A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic motor
- unit
- vibration
- power transmission
- moving
- 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
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 4
- 239000005060 rubber Substances 0.000 claims abstract description 4
- 239000011358 absorbing material Substances 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 abstract description 6
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 3
- 229920003052 natural elastomer Polymers 0.000 abstract description 3
- 229920001194 natural rubber Polymers 0.000 abstract description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
圧電体を用いて進行波をともなう超音波振動を発生させ
ることによシ駆動することのできるモータに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor that can be driven by generating ultrasonic vibrations accompanied by traveling waves using a piezoelectric material.
従来の技術
進行波方式による超音波モータは、固定部と移動部が相
互に接触加圧され、前記固定部に圧電体を装着した構造
を有する。圧電体の両端に時間差と位相差をつけつつ電
圧を印加することにより、進行波をともなう超音波振動
を発生させることができ、固定部を通して移動部へと伝
えられ移動部が駆動する。固定部は、振動を効率良く伝
達する弾性体として通常金属材料が用いられる。一方、
移動部は、外部へ発生した駆動力ｔ伝えるため、ある程
度の機械的強度が必要でありかっ、固定部と面接触によ
り相互に加圧接触されるだめ平面性を有するものが必要
で、通常は単に金属材料単独で構成されてきた。また、
別法としてスライダーというものを用いて移動部を構成
することも考えられる。A conventional traveling wave type ultrasonic motor has a structure in which a fixed part and a moving part are brought into contact with each other and pressurized, and a piezoelectric body is attached to the fixed part. By applying voltage to both ends of the piezoelectric body with a time difference and a phase difference, it is possible to generate ultrasonic vibrations accompanied by traveling waves, which are transmitted through the fixed part to the moving part and drive the moving part. The fixing part is usually made of a metal material as an elastic body that efficiently transmits vibrations. on the other hand,
The movable part must have a certain degree of mechanical strength in order to transmit the driving force generated to the outside, and must have flatness so that it can come into pressure contact with the fixed part through surface contact. It has been constructed simply from metal materials alone. Also,
Alternatively, it is also conceivable to configure the moving section using something called a slider.
発明が解決しようとする問題点
しかしながら、超音波モータの回転力を移動部から外部
へ取シ出す際、従来の金属材料単独からなる移動部の構
成では、移動部自体が超音波振動により振動し、外部へ
の動力伝達部を通じて被移動体も、微少の振動をすると
いう重大な欠点があった。″！た、移動部が、振動する
ので、ある条件によって騒音が発生するという問題もあ
った。Problems to be Solved by the Invention However, when the rotational force of the ultrasonic motor is extracted from the moving part to the outside, with the conventional structure of the moving part made solely of metal material, the moving part itself vibrates due to the ultrasonic vibrations. However, there was a serious drawback in that the moving object also vibrated slightly through the power transmission section to the outside. Also, since the moving part vibrates, there is also the problem that noise may be generated under certain conditions.
問題点を解決するための手段
この問題を解決するため本発明、固定部と移動部を接触
加圧させる構成をとりかつ進行波をともなう超音波振動
により駆動する超音波モータにおいて、前記移動部が、
前記固定部との接触加圧面と外部への動力伝達部との間
に少くとも振動吸収材を介して構成するものである。Means for Solving the Problem In order to solve this problem, the present invention provides an ultrasonic motor configured to bring a fixed part and a moving part into contact and pressurized and driven by ultrasonic vibration accompanied by a traveling wave, in which the moving part is ,
At least a vibration absorbing material is interposed between the contact pressurizing surface with the fixing part and the power transmission part to the outside.
作用
圧電体を装着した固定部は、圧電体の両端に電圧を印加
して超音波振動を発生させることにより、数ミクロンの
変位を有する微少な振動をする。その微少な振動が、固
定部に加圧接触されている移動部へ伝わシ駆動するから
、移動部も微少な振動をすることになる。この微少な振
動は、移動部の中にある振動吸収材によシ吸収され、超
音波モータの動力伝達部には全く伝わらない。それ故、
モータとして使用する際の被移動体にも微少の振動が伝
達されず、必要とする移動力だけ伝達されることになる
。The fixing part to which the working piezoelectric body is mounted generates minute vibrations with a displacement of several microns by applying a voltage to both ends of the piezoelectric body to generate ultrasonic vibrations. This minute vibration is transmitted to and drives the moving section that is in pressurized contact with the fixed section, so that the moving section also makes slight vibrations. This minute vibration is absorbed by the vibration absorbing material in the moving part and is not transmitted to the power transmission part of the ultrasonic motor at all. Therefore,
When used as a motor, minute vibrations are not transmitted to the moving object, and only the necessary moving force is transmitted.
さらに、このような振動吸収材を移動部の中に挿入する
ことにより、余分な振動が吸収されるので騒音も抑制さ
れる。Furthermore, by inserting such a vibration absorbing material into the moving part, excess vibrations are absorbed and noise is also suppressed.
実施例 本発明の超音波モータの基本構成要素を第１図に示す。Example The basic components of the ultrasonic motor of the present invention are shown in FIG.
圧電体１を装着した固定部２に移動部を加圧接触させる
。第１図では、接触部分は便宜上多少離れて図示されて
いるが実際は、均−に加圧接触されている。移動部は、
外部へ駆動力を伝えるための動力伝達部３と、不必要な
振動を吸収するだめの振動吸収材４と、シート状成型物
５を装着した加圧接触部６とで構成した。動力伝達部は
、外部へ駆動力を伝える役目をするため、ある程度の機
械的強度が必要であり通常の金属材料からなる。加圧接
触部は、固定部からの進行波をともなう超音波振動を効
率よく伝達し駆動力を得る役目をするもので、平面性を
有する硬質材料に複合材料からなるシート状成型物をエ
ボキシ系接着剤にて貼り付けたものを用いた。振動吸収
材としては、発泡プラスチックのように多孔質構造を有
するものや天然ゴム，スチレンープタジエンゴムなどの
ゴム材を用いた。The movable part is brought into pressure contact with the fixed part 2 on which the piezoelectric body 1 is mounted. In FIG. 1, the contact portions are shown separated from each other for convenience, but in reality, they are evenly pressed into contact. The moving part is
It consists of a power transmission section 3 for transmitting driving force to the outside, a vibration absorbing material 4 for absorbing unnecessary vibrations, and a pressure contact section 6 to which a sheet-like molded material 5 is attached. Since the power transmission part plays the role of transmitting the driving force to the outside, it requires a certain degree of mechanical strength and is made of a normal metal material. The pressurized contact part plays the role of efficiently transmitting ultrasonic vibrations accompanied by traveling waves from the fixed part to obtain driving force. The one attached with adhesive was used. As the vibration absorbing material, a material having a porous structure such as foamed plastic, or a rubber material such as natural rubber or styrene-butadiene rubber was used.
第２図には、本発明を実際に構成した１例として、円板
型の超音波モータの構成を示した。振動吸収材としては
、厚さ１篇の発泡ポリウレタンのシートを用いエボキシ
系接着剤にて動力伝達部と加圧接触部に貼りつけること
により移動部を構成した。動力伝達部は、ステンレスで
構成し加圧接触部はシート状成型物を表面研摩したステ
ンレス材に接着することにより構成した。また、移動部
と固定部との間の接触加圧力は、軸７の底面よりネジで
締めつけることにより与えた。このようにして構成され
た円板型の超音波モータの圧電体の両端に電圧を加える
ことによシ超音波振動を発生させ、移動部を回転させた
。従来、多少の上下運動などの軸プレの現象が見られた
軸は全く軸ヲレを起さず安定に回転し、動力伝達部も全
くプレが見られなかった。FIG. 2 shows the configuration of a disk-type ultrasonic motor as an example of an actual configuration of the present invention. As a vibration absorbing material, a sheet of foamed polyurethane having a thickness of one layer was used and was attached to the power transmission part and the pressure contact part with an epoxy adhesive to construct the moving part. The power transmission part was constructed of stainless steel, and the pressure contact part was constructed by adhering a sheet-like molded product to a stainless steel material whose surface was polished. Further, contact pressure between the movable part and the fixed part was applied by tightening the shaft 7 from the bottom surface with a screw. By applying a voltage to both ends of the piezoelectric body of the disk-shaped ultrasonic motor thus constructed, ultrasonic vibrations were generated and the moving section was rotated. In the past, the shaft, which had been subject to shaft pre-shaft phenomena such as some vertical movement, rotated stably without causing any shaft wobbling, and the power transmission section did not exhibit any pre-slip phenomena.
さらに、従来キーキーという高い騒音が発生する場合が
あったが、本発明の構成においては全くそのような騒音
は全く見られなかった。また、軸や動力伝達部にある程
度の余分な外力が加わっても安定に動作した。これは、
振動吸収材の部分が、本発明の構成において、外力に対
する緩衝材の役目も兼ね備えているからである。Furthermore, conventionally, high-pitched squealing noises were sometimes generated, but such noises were not observed at all in the configuration of the present invention. It also operated stably even when a certain amount of extra external force was applied to the shaft and power transmission section. this is,
This is because, in the configuration of the present invention, the vibration absorbing material also serves as a buffer against external forces.
振動吸収材として、発泡フェノール樹脂、発泡エリア樹
脂、発泡スチロール樹脂、発泡塩化ビニル樹脂、発泡エ
ポキシ樹脂、発泡ポリエチレンおよび発泡メタクリル樹
脂のシートを用いた場合も同様の結果が得られ、特に吸
音効果が著しく、騒音は全くおこらなかった。まだ別途
、振動吸収材として、天然ゴム，イソプレンゴム，ポリ
ブタジエンゴム，スチレンープタジエンゴムおよびシリ
コンゴムからなるゴム材さらにポリウレタンからなる熱
可塑性可とう性樹脂からなる１朋厚のシートをそれぞれ
用いても同様に良好な結果が得られた。すなわち、振動
を吸収することのできる程度の機械的Ｑの低い材質であ
れば、振動吸収材として用いることが可能であると思わ
れる。さらに、振動吸収材の有無により、超音波モータ
としてのトルク，回転数，モータ効率，寿命などの諸特
性は変化しなかった。Similar results were obtained when sheets of foamed phenolic resin, foamed area resin, foamed polystyrene resin, foamed vinyl chloride resin, foamed epoxy resin, foamed polyethylene, and foamed methacrylic resin were used as vibration absorbing materials, and the sound absorption effect was particularly remarkable. , there was no noise at all. Separately, as vibration absorbing materials, sheets of 1 mm thick made of rubber materials made of natural rubber, isoprene rubber, polybutadiene rubber, styrene-butadiene rubber, and silicone rubber, and thermoplastic flexible resin made of polyurethane are used. Similarly good results were obtained. That is, it seems that any material with a low mechanical Q that can absorb vibrations can be used as a vibration absorbing material. Furthermore, the various characteristics of the ultrasonic motor, such as torque, rotational speed, motor efficiency, and lifespan, did not change depending on the presence or absence of the vibration absorbing material.
一方、別の構造の超音波モータとして円環状のものに関
して、同様に移動部を振動吸収材を挿入した構成にして
駆動させると、円環からなる動力伝達部のブレもなく騒
音も全くしなかった。この円環状の場合には、接触加圧
力として磁力を用いているので、動力伝達部はフエライ
ト磁石、加圧接触部は複合材料からなるシート状成型物
を装着したフエライト磁石を用いた。On the other hand, when an annular ultrasonic motor with a different structure is driven in the same way with a moving part inserted with a vibration absorbing material, the annular power transmission part does not shake and makes no noise. Ta. In the case of this annular shape, since magnetic force is used as contact pressure, a ferrite magnet is used for the power transmission part, and a ferrite magnet equipped with a sheet-shaped molded material made of a composite material is used for the pressure contact part.
また、本発明の構成は、直線状その他の任意の形状の超
音波モータについても実現できる。Further, the configuration of the present invention can also be realized with an ultrasonic motor having a linear shape or any other shape.
発明の効果
超音波モータの移動部が、固定部との加圧接触部と外部
への動力伝達部Ａの間に少くとも振動吸収剤を介した構
成にすることにより、圧電体から発生する超音波振動を
振動吸収剤により吸収し、被移動体へ振動は全く伝達さ
れずかつ騒音も全く生じない実用に供しうる超音波モー
タを与えるものである。Effects of the Invention By configuring the moving part of the ultrasonic motor to have at least a vibration absorber interposed between the pressure contact part with the fixed part and the power transmission part A to the outside, the ultrasonic wave generated from the piezoelectric body can be reduced. The object of the present invention is to provide an ultrasonic motor that can be used in practice, in which sonic vibrations are absorbed by a vibration absorber so that no vibrations are transmitted to a moving object and no noise is generated.
第１図は、本発明の超音波モータの基本構成を示す部分
断面図 、第２図は、本発明の円板型超音波モータの構
成を示す斜視図 、第３図は、本発明の円環型超音波モ
ータの構成を示す斜視図である。
１・・・・・・圧電体、２・・・・・・固定部、３・・
・・・・動力伝達部、４・・・・・・振動吸収材、６・
・・・・・シート状成型物、６・・・・・・加圧接触部
、７・・・・・・軸。FIG. 1 is a partial sectional view showing the basic configuration of the ultrasonic motor of the present invention, FIG. 2 is a perspective view showing the configuration of the disc-type ultrasonic motor of the present invention, and FIG. 3 is a circular view of the present invention. FIG. 2 is a perspective view showing the configuration of a ring-shaped ultrasonic motor. 1... Piezoelectric body, 2... Fixed part, 3...
...Power transmission part, 4...Vibration absorber, 6.
... Sheet-like molded product, 6 ... Pressure contact part, 7 ... Shaft.
Claims (6)
進行波をともなう超音波振動により駆動する超音波モー
タにおいて移動部が、固定部との加圧接触部と外部への
動力伝達部との間に少くとも振動吸収材を介して構成さ
れることを特徴とする超音波モータ。(1) In an ultrasonic motor that has a configuration in which a fixed part and a moving part are brought into contact and pressurized and is driven by ultrasonic vibrations accompanied by a traveling wave, the moving part has a pressure contact part with the fixed part and a power transmission part to the outside. An ultrasonic motor comprising at least a vibration absorbing material interposed between the motor and the motor.
範囲第一項記載の超音波モータ。(2) The ultrasonic motor according to claim 1, wherein the vibration absorbing material has a porous structure.
の範囲第一項記載の超音波モータ。(3) The ultrasonic motor according to claim 1, wherein the vibration absorbing material is at least made of a rubber material.
らなる特許請求の範囲第一項記載の超音波モータ。(4) The ultrasonic motor according to claim 1, wherein the vibration absorbing material comprises at least a thermoplastic elastomer.
状成型物を装着してなる特許請求の範囲第一項記載の超
音波モータ。(5) The ultrasonic motor according to claim 1, wherein a sheet-like molded product made of a composite material is attached to the pressurized contact portion with the fixed portion.
形状である特許請求の範囲第一項記載の超音波モータ。(6) The ultrasonic motor according to claim 1, wherein the ultrasonic motor has a shape of either a disk or a ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141961A JPS631381A (en) | 1986-06-18 | 1986-06-18 | Ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141961A JPS631381A (en) | 1986-06-18 | 1986-06-18 | Ultrasonic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS631381A true JPS631381A (en) | 1988-01-06 |
Family
ID=15304149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61141961A Pending JPS631381A (en) | 1986-06-18 | 1986-06-18 | Ultrasonic motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS631381A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01206880A (en) * | 1988-02-09 | 1989-08-21 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPH05271791A (en) * | 1992-03-26 | 1993-10-19 | Nkk Corp | Roll cooling method of metallic strip |
| JP2006081371A (en) * | 2004-09-13 | 2006-03-23 | Nikon Corp | Vibration actuator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59188381A (en) * | 1983-04-06 | 1984-10-25 | Shinsei Kogyo:Kk | Improvement in rotor/movable element of surface wave motor |
| JPS60174074A (en) * | 1984-01-30 | 1985-09-07 | Canon Inc | Vibration wave motor |
-
1986
- 1986-06-18 JP JP61141961A patent/JPS631381A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59188381A (en) * | 1983-04-06 | 1984-10-25 | Shinsei Kogyo:Kk | Improvement in rotor/movable element of surface wave motor |
| JPS60174074A (en) * | 1984-01-30 | 1985-09-07 | Canon Inc | Vibration wave motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01206880A (en) * | 1988-02-09 | 1989-08-21 | Matsushita Electric Ind Co Ltd | Ultrasonic motor |
| JPH05271791A (en) * | 1992-03-26 | 1993-10-19 | Nkk Corp | Roll cooling method of metallic strip |
| JP2006081371A (en) * | 2004-09-13 | 2006-03-23 | Nikon Corp | Vibration actuator |
| JP4622403B2 (en) * | 2004-09-13 | 2011-02-02 | 株式会社ニコン | Vibration actuator |
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