JPH0530149B2 - - Google Patents
Info
- Publication number
- JPH0530149B2 JPH0530149B2 JP59234073A JP23407384A JPH0530149B2 JP H0530149 B2 JPH0530149 B2 JP H0530149B2 JP 59234073 A JP59234073 A JP 59234073A JP 23407384 A JP23407384 A JP 23407384A JP H0530149 B2 JPH0530149 B2 JP H0530149B2
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- vibration
- drive
- drive motor
- vibrating
- 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
- 239000000284 extract Substances 0.000 claims description 4
- 230000005284 excitation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 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
- H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
- H02N2/16—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors using travelling waves, i.e. Rayleigh surface waves
- H02N2/163—Motors with ring stator
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、超音波振動を駆動源とした超音波駆
動モータに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ultrasonic drive motor using ultrasonic vibration as a drive source.
（従来例の構成とその問題点）
従来の超音波駆動モータは、駆動面を有する超
音波駆動体（ステータ部）と、さらに駆動面に接
触して運動エネルギーを取り出すための駆動面接
触体（ロータ部）から成り立つている。(Structure of conventional example and its problems) A conventional ultrasonic drive motor includes an ultrasonic drive body (stator part) having a drive surface, and a drive surface contact body (a stator part) that contacts the drive surface and extracts kinetic energy. It consists of a rotor section).
駆動体は、駆動体の一部に駆動体励振部として
圧電体を備え、駆動体（ステータ部）の駆動面を
波面に直角に取り、さらにそれらに直角方向に駆
動面接触体（ロータ部）を動かす。 The driving body includes a piezoelectric body as a driving body excitation part in a part of the driving body, the driving surface of the driving body (stator part) is set perpendicular to the wave surface, and the driving surface contacting body (rotor part) is arranged perpendicularly to them. move.
このような超音波駆動モータはその構造が単純
なため電子機器、カメラ、医療用機器等に広く利
用されている。 Such ultrasonic drive motors have a simple structure and are therefore widely used in electronic equipment, cameras, medical equipment, and the like.
しかし、この超音波駆動モータは、その構造上
ステータ部の振動成分のうち一部分しか出力運動
として取り出さないため、電力効率が低い欠点が
あつた。電力効率を上げるためには、少ない電力
で大振幅のステータ振動を行なえばよいが、実際
には、固体内の内部損失等が存在するため、大振
幅振動はかえつて効率の低下をまねいていた。 However, due to its structure, this ultrasonic drive motor extracts only a portion of the vibration components of the stator portion as output motion, and therefore has a drawback of low power efficiency. In order to increase power efficiency, it is sufficient to perform large-amplitude stator vibrations using less power, but in reality, large-amplitude vibrations actually lead to a decrease in efficiency due to the presence of internal losses within the solid. .
（発明の目的）
本発明の目的は、従来の欠点を解消し、効率の
よい超音波駆動モータを提供することである。(Object of the Invention) An object of the present invention is to eliminate the conventional drawbacks and provide an efficient ultrasonic drive motor.
（発明の構成）
本発明の超音波駆動モータは、駆動面を有する
超音波駆動体と、この超音波駆動体の駆動面に接
触して、この振動の一部を外部運動として取り出
すための駆動面接触体とを備えた超音波駆動モー
タにおいて、超音波駆動体の駆動面に凹型断面形
状の溝あるいは凸型形状の凸部が複数個設けら
れ、また超音波駆動体において、前記超音波駆動
体の一波長をλとし、超音波駆動体全体でｍ（ｍ
は２より大きい整数）の超音波を励振したとき、
ｍに対して互いに素なる数をＮとすると、ｍ×λ
の振動領域内で、前記凹部または凸部の数をＮ個
としたものである。なおＮはｍより大とするもの
である。(Structure of the Invention) The ultrasonic drive motor of the present invention includes an ultrasonic drive body having a drive surface, and a drive that contacts the drive surface of the ultrasonic drive body and extracts a part of the vibration as external motion. In an ultrasonic drive motor equipped with a surface contact body, a plurality of grooves with a concave cross section or convex portions with a convex shape are provided on the drive surface of the ultrasonic drive body, and in the ultrasonic drive body, the ultrasonic drive Let one wavelength of the body be λ, and the entire ultrasonic driving body is m (m
is an integer greater than 2) when exciting ultrasonic waves,
If N is a number that is relatively prime to m, then m×λ
The number of the concave portions or convex portions is N within the vibration region. Note that N is greater than m.
また、振動駆動部は振動部の左右を結んだ形、
すなわち円環形状を有し、この円環状に接する形
で同様構造を有するロータ部が構成されたもので
ある。 In addition, the vibration drive unit has a shape that connects the left and right sides of the vibration unit,
That is, it has an annular shape, and a rotor portion having a similar structure is constructed in contact with the annular shape.
（実施例の説明）
本発明の一実施例を第１図ないし第３図に基づ
いて説明する。第１図は超音波駆動モータの斜視
図であり、第２図は同断面図である。(Description of Embodiment) An embodiment of the present invention will be described based on FIGS. 1 to 3. FIG. 1 is a perspective view of the ultrasonic drive motor, and FIG. 2 is a sectional view thereof.
図において１はステータ部、２はロータ部であ
り、ステータ部１はステータ固定台３に設けられ
たステータ支持部４に、圧電体５および、駆動面
６を具えた鉄等の振動部材７を相互に接着した励
振部８を支持させており、ロータ部２は従動面９
がリング状に形成され中心に回転軸１０をもつて
いる。 In the figure, 1 is a stator part, and 2 is a rotor part. The stator part 1 has a piezoelectric body 5 and a vibrating member 7 made of iron or the like provided with a driving surface 6 on a stator support part 4 provided on a stator fixing base 3. Excitation parts 8 which are bonded to each other are supported, and the rotor part 2 is supported by a driven surface 9.
is formed into a ring shape and has a rotating shaft 10 at the center.
本実施例においては、振動部材７の駆動面６に
溝１１を設けている。駆動面は駆動超音波の９波
長分の波が載るような構造となつている。振動部
材７の全体の厚さをｔとすると溝１１の深さを2/
５ｔとし、さらに溝１１の数を振動部材７のリン
グ全体で91本とした。これは半波長で約５本とな
り、波長の数と溝の数は互いに素となる。このと
きの面内の振動分布を第３図に示す。同図で明白
なように面全体に一様な振動分布が得られている
ことが示されている。これは本発明の最も重要な
点で、面内分布に不均一な振動分布が生じている
ならば、これは外部に不用振動として表われてく
るが、本発明においては、これらが全く生じてい
ない。 In this embodiment, a groove 11 is provided in the drive surface 6 of the vibrating member 7. The driving surface has a structure on which nine wavelengths of driving ultrasonic waves are placed. If the overall thickness of the vibrating member 7 is t, then the depth of the groove 11 is 2/
5t, and the number of grooves 11 was 91 in the entire ring of the vibrating member 7. This is about five half wavelengths, and the number of wavelengths and the number of grooves are relatively prime. The in-plane vibration distribution at this time is shown in FIG. As is clear from the figure, it is shown that a uniform vibration distribution is obtained over the entire surface. This is the most important point of the present invention; if non-uniform vibration distribution occurs in the plane, this will appear externally as unnecessary vibration, but in the present invention, this does not occur at all. do not have.
振動部材上に凹型形状の溝を設けても、または
凸型形状の物体を設けてもよいが、このようにす
ることにより超音波振動部材の基本振動形態が変
らないようにするためである。 Although a concave groove or a convex object may be provided on the vibrating member, this is to prevent the basic vibration form of the ultrasonic vibrating member from changing.
特に振動体と振動体とが複合して振動を行なう
ことにより互いに干渉がおこり、２つの周波数の
和、または差のいわゆるビート振動が生じてく
る。このビート振動は超音波駆動モータにおい
て、第１に不用振動を発し、外部雑音として外部
に妨害を与える。第２に効率の減少をもたらすも
のである。 In particular, when the vibrating body and the vibrating body vibrate in combination, they interfere with each other, resulting in so-called beat vibration, which is the sum or difference of two frequencies. This beat vibration first generates unnecessary vibration in the ultrasonic drive motor, and causes disturbance to the outside as external noise. Second, it results in a decrease in efficiency.
（発明の効果）
本発明によれば、ステータ部に適当に制御され
た距離で凹部溝を設けることにより、妨害振動を
生ずることなく、効率を高くする効果がある。(Effects of the Invention) According to the present invention, by providing the stator portion with concave grooves at appropriately controlled distances, there is an effect of increasing efficiency without causing disturbing vibrations.
第１図は本発明の一実施例による超音波駆動モ
ータの斜視図、第２図は同断面図、第３図は回転
角度の振動振幅分布図である。
１……ステータ部、２……ロータ部、３……ス
テータ固定台、４……ステータ支持部、５……圧
電体、６……駆動面、７……駆動面を形成する振
動部材、８……励振部、９……従動面、１０……
回転軸、１１……溝。
FIG. 1 is a perspective view of an ultrasonic drive motor according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a vibration amplitude distribution diagram of the rotation angle. DESCRIPTION OF SYMBOLS 1... Stator part, 2... Rotor part, 3... Stator fixing base, 4... Stator support part, 5... Piezoelectric body, 6... Drive surface, 7... Vibration member forming the drive surface, 8 ... Excitation part, 9 ... Driven surface, 10 ...
Rotating shaft, 11...groove.
Claims (1)
に接触して、振動の一部を外部運動として取り出
すための駆動面接触体とを備えた超音波駆動モー
タにおいて、前記超音波振動部材の駆動面に凹型
断面形状あるいは凸型断面形状の溝あるいは凸部
が複数個設けられ、前記超音波振動部材に載る超
音波の１波長をλとし、超音波振動部材全体をｍ
波長分（ｍは２より大きい整数）の超音波で励振
したとき、ｍ×λの振動領域内で、溝または凸部
をＮ個（Ｎはｍより大きくｍに対して互いに素）
設けることを特徴とする超音波駆動モータ。 ２ 振動駆動部として振動部の両端を結んだ形、
すなわち円環形状を有する振動駆動部および、前
記円環形状に接する形で同様構造を有するロータ
部より構成される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モータ。[Scope of Claims] 1. An ultrasonic drive motor comprising an ultrasonic vibration member having a drive surface, and a drive surface contact member that contacts the drive surface and extracts a part of the vibration as external motion, A plurality of grooves or convex portions having a concave or convex cross section are provided on the driving surface of the ultrasonic vibrating member, and one wavelength of the ultrasonic wave applied to the ultrasonic vibrating member is λ, and the entire ultrasonic vibrating member is m
When excited with ultrasonic waves of a wavelength (m is an integer greater than 2), N grooves or protrusions are formed within the m x λ vibration region (N is greater than m and coprime to m).
An ultrasonic drive motor comprising: 2 A shape in which both ends of the vibrating part are tied together as a vibrating drive part,
That is, the ultrasonic drive motor according to claim 1, characterized in that the ultrasonic drive motor comprises a vibration driving section having an annular shape and a rotor section having a similar structure in contact with the annular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59234073A JPS61116979A (en) | 1984-11-08 | 1984-11-08 | Supersonic wave drive motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59234073A JPS61116979A (en) | 1984-11-08 | 1984-11-08 | Supersonic wave drive motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61116979A JPS61116979A (en) | 1986-06-04 |
| JPH0530149B2 true JPH0530149B2 (en) | 1993-05-07 |
Family
ID=16965167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59234073A Granted JPS61116979A (en) | 1984-11-08 | 1984-11-08 | Supersonic wave drive motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61116979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005253131A (en) * | 2004-03-01 | 2005-09-15 | Nikon Corp | Vibration wave motor |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6311073A (en) * | 1986-06-30 | 1988-01-18 | Canon Inc | Vibrating wave motor |
| JP2536067B2 (en) * | 1988-06-10 | 1996-09-18 | 株式会社村田製作所 | Piezoelectric motor |
| JP2698412B2 (en) * | 1989-02-14 | 1998-01-19 | キヤノン株式会社 | Vibration wave device |
| JP2669890B2 (en) * | 1989-04-19 | 1997-10-29 | キヤノン株式会社 | Vibration wave drive |
| JP2698414B2 (en) * | 1989-02-17 | 1998-01-19 | キヤノン株式会社 | Vibration wave device |
| JP2675884B2 (en) * | 1989-12-29 | 1997-11-12 | キヤノン株式会社 | Vibration wave device |
| JP2685284B2 (en) * | 1989-04-20 | 1997-12-03 | キヤノン株式会社 | Vibration wave device |
| JPH072029B2 (en) * | 1989-06-26 | 1995-01-11 | セイコー電子工業株式会社 | Ultrasonic motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3415628A1 (en) * | 1983-04-30 | 1984-10-31 | Canon K.K., Tokio/Tokyo | VIBRATION SHAFT MOTOR |
-
1984
- 1984-11-08 JP JP59234073A patent/JPS61116979A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3415628A1 (en) * | 1983-04-30 | 1984-10-31 | Canon K.K., Tokio/Tokyo | VIBRATION SHAFT MOTOR |
| JPS59201685A (en) * | 1983-04-30 | 1984-11-15 | Canon Inc | Vibration wave motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005253131A (en) * | 2004-03-01 | 2005-09-15 | Nikon Corp | Vibration wave motor |
| JP4654583B2 (en) * | 2004-03-01 | 2011-03-23 | 株式会社ニコン | Vibration wave motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61116979A (en) | 1986-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |