JP2003244976A - Ultrasonic motor having abrasion particles scatter preventive function - Google Patents
Ultrasonic motor having abrasion particles scatter preventive functionInfo
- Publication number
- JP2003244976A JP2003244976A JP2002035535A JP2002035535A JP2003244976A JP 2003244976 A JP2003244976 A JP 2003244976A JP 2002035535 A JP2002035535 A JP 2002035535A JP 2002035535 A JP2002035535 A JP 2002035535A JP 2003244976 A JP2003244976 A JP 2003244976A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- ultrasonic motor
- vibrating body
- abrasion
- friction
- 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
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、摩擦により駆動す
る超音波モータの構造に関し、特に摩擦粉飛散防止機能
を備えた構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an ultrasonic motor driven by friction, and more particularly to a structure having a friction powder scattering prevention function.
【０００２】[0002]
【従来の技術】定在波方式の超音波モータであって、小
型化に適し単相駆動による正逆回転が可能で、自励振駆
動が容易な超音波モータが知られている。図１０に、こ
の超音波モータの圧電素子の電極パターンと出力を取り
出すための突起２との位置関係を示すとともに、図１１
には振動体１の変位とロータ３の移動方向の関係を周方
向に展開して示す。図１０のイに示されるように、圧電
素子４の電極パターンは周方向に１／４波長毎に１２分
割されている。一つおきに方向を変えて分極処理を施し
ており、振動体１に設けられた６本の突起２を隣り合う
二つのパターンの境界線上に設け、圧電素子４との接着
を行っている。図１０のロには周方向断面図が示されて
おり、振動体１の突起部分２がロータ３と接触する形態
が見て取れる。１２個の電極は一つおきに短絡し、斜線
部と非斜線部の二つの電極パターン群を構成している。
斜線部の電極パターン群に駆動信号を印加すると図１１
に示したように振動体１は円周方向に変形する。図のイ
に示す振動の場合、突起２は上昇時に右に傾き、下降時
に左に傾くため、常にロータは右に傾いた３本の突起２
とのみ接するようになり、突き上げられつつ右方向に移
動する。逆に、図のロに示す振動の場合、非斜線部に駆
動信号を印加した場合には、波に対する突起２の位置が
変わりロータは逆方向に移動する。このように駆動信号
を印加する電極パターンを選択することで容易に正逆回
転の切換えが可能となる。2. Description of the Related Art There is known a standing wave type ultrasonic motor which is suitable for downsizing and which can be rotated forward and backward by single-phase driving and which can be easily driven by self-excitation. FIG. 10 shows the positional relationship between the electrode pattern of the piezoelectric element of this ultrasonic motor and the projection 2 for taking out the output, and FIG.
Shows the relationship between the displacement of the vibrating body 1 and the moving direction of the rotor 3 in the circumferential direction. As shown in (a) of FIG. 10, the electrode pattern of the piezoelectric element 4 is divided into twelve quarter wavelengths in the circumferential direction. The polarization process is performed by changing the direction of every other one, and the six protrusions 2 provided on the vibrating body 1 are provided on the boundary line between two adjacent patterns, and the piezoelectric element 4 is bonded. A sectional view in the circumferential direction is shown in FIG. 10B, and it can be seen that the protruding portion 2 of the vibrating body 1 is in contact with the rotor 3. Twelve electrodes are short-circuited every other one, forming two electrode pattern groups of a shaded portion and a non-shaded portion.
When a drive signal is applied to the electrode pattern group in the shaded area, FIG.
As shown in, the vibrating body 1 is deformed in the circumferential direction. In the case of the vibration shown in (a) of the figure, the protrusion 2 tilts to the right when rising and tilts to the left when descending, so the rotor is always tilted to the right.
It comes into contact only with and moves to the right while being pushed up. On the contrary, in the case of the vibration shown in B of the figure, when the drive signal is applied to the non-hatched portion, the position of the protrusion 2 with respect to the wave changes and the rotor moves in the opposite direction. By selecting the electrode pattern to which the drive signal is applied in this manner, it is possible to easily switch the forward and reverse rotations.
【０００３】上述した動作原理を用いた超音波モータの
構造図を図１２に示す。ここに示すものは、振動体１の
外径は4.5ｍｍ、モータの厚みは2.5ｍｍのものである。
支持台５に打ち込まれた中心軸６は、振動の節となる振
動体１の中心部分を支持するとともにロータ３の回転案
内も兼ねている。振動体１の上面には図１０と同様の圧
電素子４が接着されており、径方向に一つ、周一方向に
三つの波数を持つＢ１，３モードを励振する。振動体１
の振動変位最大部付近には、振動から一定方向の力を取
り出すための突起２が設けられている。超音波モータ
は、小型化に伴って振動体１の共振周波数が高くなり、
振動振幅が小さくなる。そこで、振動体円周方向に発生
させる定在波の波数を３とすることで、振動体突起２と
ロ一夕３との接触状態を安定させるために３点接触の構
造としている。また、ロータ３は振動体１の突起２と接
する揺動面も兼ねるため耐摩耗性に優れたＰＰＳを母材
とする特殊なエンジニアリングプラスチックから形成さ
れている。ロータ３上部のピボット９を加圧ばね10によ
って加圧することによりロータ摺動面と振動体突起２と
の間に適度な摩擦力が働く構造となっている。FIG. 12 shows a structural diagram of an ultrasonic motor using the above-described operation principle. Here, the vibrating body 1 has an outer diameter of 4.5 mm and the motor has a thickness of 2.5 mm.
The central shaft 6 driven into the support base 5 supports the central portion of the vibrating body 1 that serves as a vibration node, and also serves as a rotation guide for the rotor 3. A piezoelectric element 4 similar to that shown in FIG. 10 is bonded to the upper surface of the vibrating body 1 to excite the B1 and 3 modes having one wave number in the radial direction and three wave numbers in the circumferential direction. Vibrating body 1
A protrusion 2 for extracting a force in a certain direction from the vibration is provided near the maximum vibration displacement portion. As the ultrasonic motor becomes smaller, the resonance frequency of the vibrating body 1 becomes higher,
Vibration amplitude becomes smaller. Therefore, the number of standing waves generated in the circumferential direction of the vibrating body is set to 3, so that the contact state between the vibrating body projections 2 and the upper and lower sides 3 is stabilized to have a three-point contact structure. Further, since the rotor 3 also serves as a swinging surface in contact with the protrusions 2 of the vibrating body 1, it is formed of a special engineering plastic whose base material is PPS having excellent wear resistance. By pressing the pivot 9 on the upper portion of the rotor 3 by the pressure spring 10, an appropriate frictional force is exerted between the rotor sliding surface and the vibrator protrusion 2.
【０００４】この超音波モータは振動体１における局部
的構造の突起２を介して摩擦力によってロータ３（移動
体）に駆動力を付与するものであるため、この突起２と
接触する部分には強い負荷が掛かり、上記したエンジニ
アリングプラスチックなどからなるロータ摺動部材が摩
擦によってその粉末が飛散するという現象を伴う。その
飛散した摩擦粉が軸受部７や当該超音波モータを組み込
んだシステムの機能部に入り込み、その機能に好ましく
ない影響をもたらすという問題を生じている。この問題
への対策を講じた超音波アクチュエータの例として、従
来、特開平８−９６６５号公報に開示のものが知られて
いる。そこに示される技術的思想は、超音波アクチュエ
ータの摺動部分に用いる摺動部材において、摺動部材と
被駆動体とが摩擦することによりその両者間に生じる磨
耗粉を周囲に散乱させないように集積させる手段を摺動
部材に講じるものであって、この磨耗粉を集積させる具
体的手段には前記摺動部材を帯電させておくことで摩
擦粉が静電荷を帯びたものであることとし、磨耗粉自体
が吸引しあって集積し、飛散しないようにしたもの、
前記摺動材料に含浸された液体もしくは摺動面に散布さ
れた液体によって、該液体が介在するとにより磨耗粉が
湿潤して集積し、飛散しないようにしたものが示されて
いる。この発明の摺動材料によれば、の手段に係る作
用として、磨耗粉に静電荷を帯電させることにより磨耗
粉自体が電気的に引き合って周囲に飛散せずに集積され
る。また、の手段に係る作用として、磨耗粉が液体に
て湿潤されるので飛散せずに集積される、というもので
あった。しかし、この方法は超音波モータの摺動部自体
を帯電させるか含油させ、それによって摩擦粉塵を集積
させるものであるため、集積された粉塵が該摺動部に付
着して接触するロータの駆動のロスになるという可能性
があった。Since this ultrasonic motor applies a driving force to the rotor 3 (moving body) by frictional force through the protrusion 2 having a local structure in the vibrating body 1, the portion contacting the protrusion 2 is A strong load is applied, and the powder of the rotor sliding member made of engineering plastic or the like scatters due to friction. There is a problem that the scattered friction powder enters the bearing unit 7 and the functional unit of the system incorporating the ultrasonic motor, and adversely affects the function. As an example of an ultrasonic actuator that takes measures against this problem, the one disclosed in Japanese Patent Laid-Open No. 8-9665 is known. The technical idea shown therein is that in a sliding member used for a sliding portion of an ultrasonic actuator, the abrasion powder generated between the sliding member and the driven body due to friction between the sliding member and the driven body should not be scattered to the surroundings. A means for accumulating is provided to the sliding member, and the specific means for accumulating the abrasion powder is that the friction powder is electrostatically charged by charging the sliding member. Abrasion powder itself is attracted to each other and accumulated to prevent scattering.
A liquid impregnated into the sliding material or a liquid sprayed on the sliding surface is used to wet and accumulate the abrasion powder due to the interposition of the liquid so as not to scatter. According to the sliding material of the present invention, as a function of the means, the abrasion powder itself is electrically attracted by being charged with an electrostatic charge, and the abrasion powder is accumulated without being scattered around. Further, as a function of the means, since the abrasion powder is wet with the liquid, it is accumulated without scattering. However, in this method, the sliding part itself of the ultrasonic motor is charged or oiled, and thereby the friction dust is accumulated, so that the accumulated dust adheres to the sliding part and comes into contact with it. There was a possibility that it would be a loss of.
【０００５】[0005]
【発明が解決しようとする課題】本発明の課題は、摩擦
粉塵が飛散して周辺機能部材に悪影響を及ばさないよう
に集塵機能を備える超音波モータにおいて、粉塵が振動
体とロータの接触部分に集積されるようなことがなく、
その存在がロータ駆動の妨げにならないような摩擦粉飛
散防止機能を備えた超音波モータを提供することにあ
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an ultrasonic motor having a dust collecting function so as to prevent frictional dust from scattering and adversely affecting peripheral functional members. Is not accumulated in
An object of the present invention is to provide an ultrasonic motor having a friction powder scattering prevention function whose existence does not hinder the driving of the rotor.
【０００６】[0006]
【課題を解決するための手段】本発明の摩擦粉飛散防止
機能を備えた超音波モータは、摩擦駆動する超音波モー
タのロータと振動体の接触部分近傍に、摩擦粉を捕獲す
るための靜電荷を帯電させたり表面が粘着剤であるよう
な付着部材を振動体のロータ側表面領域に配備するよう
にしたことを特徴とする。更に、付着部材の存在や付着
した摩擦粉塵層が振動体の振動に影響を及ぼさないよう
に、付着部材が配備される位置は、駆動振動モードにお
いて節となる振動体のロータ側表面部分とする構成を採
用する。SUMMARY OF THE INVENTION An ultrasonic motor having a friction powder scattering prevention function of the present invention is an electrostatic motor for capturing friction powder in the vicinity of a contact portion between a rotor and a vibrating body of an ultrasonic motor for friction driving. The present invention is characterized in that an attachment member for charging a load or having an adhesive surface is provided in the rotor-side surface region of the vibrating body. Further, the position where the adhering member is arranged is the rotor-side surface portion of the vibrating body that serves as a node in the drive vibration mode so that the existence of the adhering member and the adhered friction dust layer do not affect the vibration of the vibrating body. Adopt a configuration.
【０００７】[0007]
【発明の実施の形態】本発明は、図１２に示されたよう
な振動体１の突起２がロータ３に接触して摩擦により該
ロータ３を駆動させる超音波モータにおいて、前記突起
２がロータ３を衝撃する際に該ロータ３の表面部分が削
り取られ飛散する摩耗粉が図中の軸受け部に入り込んで
軸受け機能の障害となること、また、図示されていない
周辺システムの機能障害を起こす不都合を回避させるた
めに、該摩耗分を飛散させないで集塵することを前提と
し、その集塵された摩耗分の存在がロータ３の回転駆動
の支障を生じさせないようにすることに出発する。この
種の超音波モータにおける摩耗分の飛散、すなわち、突
起がロータを衝撃してロータの表面部分を削り取ること
によって飛散する摩耗粉の多くは、周辺部材に衝突し跳
ね返されながら更なる周辺に拡散してゆくものと推察さ
れる。そして、この場合の周辺部材とは構造上から振動
体１またはロータ３ということになることに鑑み、本発
明では振動体１のロータ側表面部分に衝突してきた摩耗
粉を跳ね返さないで付着させて捕獲してしまう機能をも
たせることに想到したものである。そして、摩耗粉を跳
ね返さないで付着させて捕獲してしまう機能を持つもの
に、振動体表面に粘着剤を介在させること、あるいは静
電力による吸着現象を利用することを採用するものであ
る。突起２がロータ３を衝撃してロータ３の表面部分を
削り取ることによって飛散した摩耗粉は、直接であれ他
の部材に衝突し跳ね返された後間接的にであれ、この振
動体表面の付着部材に衝突接触すれば、跳ね返されるこ
となく付着して捕獲されることとなる。ただしこの付着
して捕獲される場所が、駆動力を付与する振動体１と駆
動力を受けるロータ３との非接触部分であることが、本
発明の重要事項である。ところで、図１２に示した形式
の超音波モータでは振動体１のロータ側表面中でロータ
３と接触するのは、突起２部分だけであるから、本発明
では該突起２部分を除外した領域に付着部材８を配置す
ることを基本とする。この構成を採用することにより、
飛散された摩擦粉塵は振動体１表面に付着捕獲され、摩
擦粉塵が飛散して軸受け部７やシステムの周辺機能部材
に悪影響を及ばさないだけでなく、粉塵が振動体１とロ
ータ３の接触部分に集積されるようなことがなく、その
存在がロータ駆動の妨げにならないような摩擦粉飛散防
止機能を備えた超音波モータを提供できる。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to an ultrasonic motor in which a projection 2 of a vibrating body 1 contacts a rotor 3 and drives the rotor 3 by friction as shown in FIG. In the case where the surface portion of the rotor 3 is scraped off when the rotor 3 is impacted, and the scattered abrasion powder enters the bearing portion in the figure to hinder the bearing function, and also causes the malfunction of the peripheral system (not shown). In order to avoid the above, it is premised that dust is collected without scattering the wear, and the existence of the collected wear does not hinder the rotational driving of the rotor 3. Most of the wear particles scattered by this kind of ultrasonic motor, that is, the wear particles scattered by the projections impacting the rotor and scraping off the surface of the rotor, are scattered to further surroundings while colliding with peripheral members and bouncing off. It is speculated that this will continue. In view of the fact that the peripheral member in this case is the vibrating body 1 or the rotor 3 from a structural point of view, in the present invention, the abrasion powder that has collided with the rotor-side surface portion of the vibrating body 1 is attached without being repelled. It was conceived to have the function of capturing. Then, it is adopted to interpose an adhesive on the surface of the vibrating body or to utilize the adsorption phenomenon by electrostatic force to the one having a function of adhering and capturing the abrasion powder without bouncing it. The abrasion powder scattered by the projection 2 impacting the rotor 3 and scraping off the surface portion of the rotor 3 directly or indirectly after colliding with another member and after being bounced off, the adhered member on the surface of the vibrating body If they collide with and come into contact with, they will be attached and captured without being repelled. However, it is an important matter of the present invention that the place where these are attached and captured is a non-contact portion between the vibrating body 1 which gives the driving force and the rotor 3 which receives the driving force. By the way, in the ultrasonic motor of the type shown in FIG. 12, since only the protrusion 2 is in contact with the rotor 3 on the rotor side surface of the vibrating body 1, in the present invention, the region excluding the protrusion 2 is included. The attachment member 8 is basically arranged. By adopting this configuration,
The scattered dust particles adhere to and are captured on the surface of the vibrating body 1, and the frictional dust particles are not scattered and do not adversely affect the bearing portion 7 and peripheral functional members of the system. It is possible to provide an ultrasonic motor having a friction powder scattering prevention function whose presence does not hinder the driving of the rotor without being integrated in a part.
【０００８】[0008]
【実施例１】図１乃至図４を参照しながら本発明の１実
施例について説明する。この超音波モータは図１０乃至
図１２に示した超音波モータと基本構造は同様である。
すなわち、圧電素子４の電極パターンは周方向に１／４
波長毎に１２分割されている。一つおきに方向を変えて
分極処理を施しており、振動体１に設けられた突起２を
隣り合う二つのパターンの境界線上に設け、圧電素子４
との接着を行っている。振動モードは先の例と同じく周
方向に３波長径方向に１波長のＢ１，３モードであり、
径方向振動の節ｎと腹ａの位置は図２のようになる。[Embodiment 1] An embodiment of the present invention will be described with reference to FIGS. This ultrasonic motor has the same basic structure as the ultrasonic motor shown in FIGS.
That is, the electrode pattern of the piezoelectric element 4 is 1/4 in the circumferential direction.
It is divided into 12 for each wavelength. The polarization process is performed by changing the direction of every other one, and the protrusions 2 provided on the vibrating body 1 are provided on the boundary line between two adjacent patterns, and the piezoelectric element 4 is provided.
We are adhering to. The vibration mode is B1,3 mode with three wavelengths in the circumferential direction and one wavelength in the radial direction, as in the previous example.
The positions of the radial vibration node n and the antinode a are as shown in FIG.
【０００９】この実施例では、図３の断面図と振動体１
のロータ側表面を示した図４から分かるように突起部２
のある径領域を除いたほぼ全面に付着部材８を配置する
ようにし、その付着部材８には両面シールを振動体１に
貼着する構成を採用した。このような構成を採用するこ
とにより、飛散された摩擦粉塵は振動体表面に広く配置
された付着部材８に確実に捕獲され、摩擦粉塵が飛散し
て軸受け部７やシステムの周辺機能部材に悪影響を及ぼ
さないだけでなく、粉塵が振動体１とロータ３の接触部
分に集積されるようなことがなく、その存在がロータ駆
動の妨げにならないような摩擦粉飛散防止機能を備えた
超音波モータを提供できる。なお、この例では付着部材
８に両面シールを振動体に貼着する構成を採用したが、
粘着剤を振動体１の同領域に塗布する構成であっても、
靜電荷帯電素材を同領域に接着した構成であっても良
く、同様の作用効果を奏する。In this embodiment, the sectional view of FIG.
As can be seen from FIG. 4 showing the rotor side surface of the protrusion 2
The adhesive member 8 is arranged on almost the entire surface excluding a certain diameter region, and a double-sided seal is attached to the vibrator 1 on the adhesive member 8. By adopting such a configuration, the scattered frictional dust is reliably captured by the adhering member 8 widely arranged on the surface of the vibrating body, and the frictional dust is scattered to adversely affect the bearing portion 7 and peripheral functional members of the system. In addition to the above, the ultrasonic motor is equipped with a friction powder scattering prevention function that prevents dust from being accumulated at the contact portion between the vibrating body 1 and the rotor 3 and its presence does not hinder the rotor driving. Can be provided. In this example, a structure in which a double-sided seal is attached to the vibrating body on the attaching member 8 is adopted.
Even if the adhesive is applied to the same region of the vibrating body 1,
It may have a configuration in which the blue and electrically charged material is adhered to the same region, and the same action and effect are obtained.
【００１０】[0010]
【実施例２】次に異なる実施例の断面図を図５に示し、
振動体１のロータ側表面を図６に示す。付着部材８には
先の実施例と同様なものを用いるが、その付着部材８が
配備される位置は、駆動振動モードにおいて径方向振動
の節となる振動体１のロータ側表面部分、同心円状の帯
状リングとしたものである。この実施例において付着部
材８が配備される位置を、何故振動の節となる振動体１
のロータ側表面部分にしたかといえば、振動体１のロー
タ側表面部分の大部分に付着部材を配置した先の実施例
において、その付着部材８の存在及び付着部材８に付着
した摩耗粉が付着して出来た層が振動体１の振動に影響
することが分かったからである。本実施例のように振動
の際に節となる振動体１のロータ側表面部分に付着部材
８を配置しても、その部分は振動体１において振動する
部分ではないので振動を妨げる要因にはなりにくいため
である。この構成を採用すれば、飛散された摩擦粉塵は
振動体表面に配置された付着部材８に接触して確実に捕
獲され、特に軸受け部７周囲を付着部材８が囲う構造と
なっているため、摩擦粉塵が飛散して軸受け部７に入り
込むことやシステムの周辺機能部材に悪影響を及ぼさな
いだけでなく、粉塵が振動体１とロータ３の接触部分に
集積されるようなことがなく、その存在がロータ駆動の
妨げにならない上、付着部材８の存在及び付着部材８に
付着した摩耗粉が付着して出来た層が振動体１の振動に
影響することがないような摩擦粉飛散防止機能を備えた
超音波モータを提供できる。[Embodiment 2] FIG. 5 shows a sectional view of a different embodiment.
The surface of the vibrating body 1 on the rotor side is shown in FIG. The same adhesive member 8 as that used in the previous embodiment is used, but the position where the adhesive member 8 is arranged is a concentric circle on the rotor-side surface portion of the vibrating body 1 that serves as a node for radial vibration in the drive vibration mode. It is a band-shaped ring. In this embodiment, the position at which the attachment member 8 is arranged is the reason why the vibrating body 1 becomes a node of vibration.
Speaking of the rotor side surface portion of the above, in the previous embodiment in which the adhering member is arranged on most of the rotor side surface portion of the vibrating body 1, the existence of the adhering member 8 and the abrasion powder adhering to the adhering member 8 are This is because it was found that the layer formed by the adhesion affects the vibration of the vibrating body 1. Even if the adhering member 8 is arranged on the rotor-side surface portion of the vibrating body 1 that serves as a node during vibration as in the present embodiment, that portion is not a portion that vibrates in the vibrating body 1 and therefore causes a factor that hinders vibration. This is because it is hard to become. If this configuration is adopted, the scattered dust dust comes into contact with the adhering member 8 arranged on the surface of the vibrating body and is reliably captured, and in particular, since the adhering member 8 surrounds the bearing portion 7, The friction dust is not scattered and does not enter the bearing portion 7 and does not adversely affect the peripheral functional members of the system, and the dust is not accumulated in the contact portion between the vibrating body 1 and the rotor 3 and its existence is present. Does not hinder the driving of the rotor, and also has a friction powder scattering prevention function that prevents the vibration of the vibrating body 1 from being affected by the presence of the adhering member 8 and the layer formed by the abrasion powder adhering to the adhering member 8. A provided ultrasonic motor can be provided.
【００１１】[0011]
【実施例３】次に、更に異なる第３の実施例を提示す
る。この実施例における付着部材８の配置位置を図７に
その振動体１のロータ側表面平面図として示す。この実
施例も振動の際に節となる振動体１のロータ側表面部分
に、摩擦粉を付着して捕獲する付着部材８を配置しよう
という技術的思想においては同様のものである。この例
では周方向振動における節の部分に放射状の帯として６
本配置するようにした。この例でもその部分は振動体１
において振動する部分ではないので振動を妨げる要因に
はなり難く、この構成を採用すれば、実施例２と同様に
飛散された摩擦粉塵は振動体表面に配置された付着部材
に確実に捕獲され、摩擦粉塵が飛散して軸受け部７やシ
ステムの周辺機能部材に悪影響を及ばさないだけでな
く、粉塵が振動体１とロータ３の接触部分に集積される
ようなことがなく、その存在がロータ駆動の妨げになら
ない上、付着部材８の存在及び付着部材８に付着した摩
耗粉が付着して出来た層が振動体１の振動に影響するこ
とがないような摩擦粉飛散防止機能を備えた超音波モー
タを提供できる。Third Embodiment Next, a third different embodiment will be presented. The arrangement position of the attachment member 8 in this embodiment is shown in FIG. 7 as a plan view of the rotor side surface of the vibrating body 1. This embodiment is also the same in the technical idea of arranging the adhering member 8 for adhering and capturing the friction powder on the rotor-side surface portion of the vibrating body 1 which becomes a node during vibration. In this example, 6 as radial bands at the nodes in the circumferential vibration.
The book is arranged. In this example as well, that part is the vibrating body 1.
Since it is not a portion that vibrates, it is unlikely to become a factor that hinders vibration. By adopting this configuration, the scattered friction dust is surely captured by the adhering member arranged on the surface of the vibrating body, as in the second embodiment. The friction dust is not scattered and does not adversely affect the bearing portion 7 and the peripheral functional members of the system, and the dust is not accumulated at the contact portion between the vibrating body 1 and the rotor 3, and the existence thereof is the rotor. In addition to not hindering the driving, a friction powder scattering prevention function is provided so that the existence of the adhering member 8 and the layer formed by the abrasion powder adhering to the adhering member 8 do not affect the vibration of the vibrating body 1. An ultrasonic motor can be provided.
【００１２】[0012]
【実施例４】次に、先の実施例２と実施例３とを組み合
わせた第４の実施例を示す。図８はその振動体１のロー
タ側表面平面図を示すものであって、この実施例も振動
の際に節となる振動体１のロータ側表面部分に、摩擦粉
を付着して捕獲する付着部材８を配置しようという技術
的思想において先の実施例２や実施例３と同様のもので
ある。ただ、付着部材８の配置位置が周方向振動と径方
向振動それぞれの節となる位置の両方となっている点で
相違している。この実施例は付着部材８が同心円状の放
射状の帯となっているため、第２実施例や第３実施例と
比較すると拡散する摩耗粉が接触する割合がより高くな
り、飛散防止効率が向上するという実施効果を奏するも
のである。Fourth Embodiment Next, a fourth embodiment in which the above-mentioned second embodiment and third embodiment are combined is shown. FIG. 8 is a plan view of the rotor-side surface of the vibrating body 1. In this embodiment, friction powder is attached to and trapped on the rotor-side surface portion of the vibrating body 1 which becomes a node during vibration. The technical idea of arranging the member 8 is the same as in the second and third embodiments. However, the difference is that the arrangement position of the adhering member 8 is at both the circumferential vibration position and the radial vibration node. In this embodiment, since the adhering member 8 is a concentric radial band, the contact ratio of the wear particles diffused is higher than in the second and third embodiments, and the scattering prevention efficiency is improved. This has the effect of carrying out.
【００１３】[0013]
【実施例５】最後に、付着部材８を支持台５及び／又は
シャーシ５’に設けた第５の実施例を示す。図９はその
断面図を示したもので、摩擦粉を付着して捕獲する付着
部材８を振動体１にではなく支持台５と超音波モータを
カバーするシャーシ５’に設けるものである。この実施
例では支持台５に設ける付着部材８は振動体１の外径を
ほぼ内径とする環状帯とし、シャーシ５’に設ける付着
部材８も同様なものとしているが、シャーシ５’の方は
単純な円板状のものでもよい。また、この実施例では摩
擦粉が軸受部７に入らないように軸を囲うように軸受部
７に円筒状の遮蔽板13を設ける構成を採るようにした。
この遮蔽板13の存在は摩擦粉が軸受７に噛み込まれない
為に有効な手段であって、この実施例に限らず前述のす
べての実施例と併用して有効である。Fifth Embodiment Finally, a fifth embodiment in which the attachment member 8 is provided on the support base 5 and / or the chassis 5'is shown. FIG. 9 is a cross-sectional view thereof, in which an attaching member 8 for attaching and capturing friction powder is provided not on the vibrating body 1 but on the support 5 and the chassis 5'covering the ultrasonic motor. In this embodiment, the attachment member 8 provided on the support base 5 is an annular band having the outer diameter of the vibrating body 1 substantially as the inner diameter, and the attachment member 8 provided on the chassis 5'is also the same, but the chassis 5'is It may be a simple disc. Further, in this embodiment, the bearing portion 7 is provided with the cylindrical shielding plate 13 so as to surround the shaft so that the friction powder does not enter the bearing portion 7.
The presence of the shielding plate 13 is an effective means because the friction powder is not caught in the bearing 7, and is effective not only in this embodiment but also in combination with all the above-mentioned embodiments.
【００１４】[0014]
【発明の効果】本発明の摩擦粉飛散防止機能を有する超
音波モータは、摩擦駆動する超音波モータのロータ３と
振動体１の接触部分近傍に、摩擦粉を捕獲する付着部材
８を配備するようにしたものであるから、飛散された摩
擦粉塵は振動体１表面に配置された付着部材８に確実に
捕獲され、摩擦粉塵が飛散して軸受け部７やシステムの
周辺機能部材に悪影響を及ばさないだけでなく、粉塵が
振動体１とロータ３の接触部分に集積されるようなこと
がなく、その存在がロータ駆動の妨げにならない。ま
た、付着部材８は靜電荷を帯電させ静電力による吸着
や、あるいは表面を粘着剤で構成して粘着力によって飛
散摩耗粉を付着して捕獲できるなど、きわめて簡素な構
成でその実効を得ることが出来る。また、本発明の摩擦
粉飛散防止機能を有する超音波モータは、付着部材８が
配備される位置を、駆動振動モードにおいて節となる振
動体１のロータ側表面部分とすることにより、上記の効
果に加え付着部材８の存在及び付着部材に付着した摩耗
粉が付着して出来た層が振動体１の振動に影響すること
がないような摩擦粉飛散防止機能を備えた超音波モータ
を実現できる。In the ultrasonic motor having the friction powder scattering prevention function of the present invention, the adhering member 8 for capturing the friction powder is provided in the vicinity of the contact portion between the rotor 3 and the vibrating body 1 of the friction driving ultrasonic motor. Therefore, the scattered friction dust is reliably captured by the adhering member 8 arranged on the surface of the vibrating body 1, and the friction dust is scattered to adversely affect the bearing portion 7 and the peripheral functional members of the system. Not only that, but dust is not accumulated in the contact portion between the vibrating body 1 and the rotor 3, and the presence thereof does not hinder the rotor driving. In addition, the adhering member 8 can be obtained by a very simple structure, such as adsorption by electrostatic force by electrostatically charging the adsorbing member 8 or by adhering the surface with an adhesive to adhering and capturing scattered abrasion powder by the adhesive force. Can be done. Further, in the ultrasonic motor having the friction powder scattering prevention function of the present invention, the above-mentioned effect is obtained by setting the position where the adhering member 8 is provided to the rotor-side surface portion of the vibrating body 1 which becomes a node in the drive vibration mode. In addition, it is possible to realize an ultrasonic motor having a friction powder scattering prevention function that prevents the vibration of the vibrating body 1 from being affected by the presence of the adhering member 8 and the layer formed by adhering the abrasion powder adhering to the adhering member. .
【図１】本発明の超音波モータのステータである振動体
の構造を示す平面図である。FIG. 1 is a plan view showing a structure of a vibrating body which is a stator of an ultrasonic motor according to the present invention.
【図２】本発明の超音波モータの駆動振動モードにおけ
る径方向の節と腹の位置を示す図である。FIG. 2 is a diagram showing positions of radial nodes and antinodes in a drive vibration mode of the ultrasonic motor of the present invention.
【図３】本発明の第１実施例である超音波モータの断面
図である。FIG. 3 is a cross-sectional view of the ultrasonic motor according to the first embodiment of the present invention.
【図４】本発明の第１実施例における振動体のロータ側
表面を示す平面図である。FIG. 4 is a plan view showing a rotor-side surface of a vibrating body according to the first embodiment of the present invention.
【図５】本発明の第２実施例である超音波モータの断面
図である。FIG. 5 is a sectional view of an ultrasonic motor according to a second embodiment of the present invention.
【図６】本発明の第２実施例における振動体のロータ側
表面を示す平面図である。FIG. 6 is a plan view showing a rotor-side surface of a vibrating body according to a second embodiment of the present invention.
【図７】本発明の第３実施例における振動体のロータ側
表面を示す平面図である。FIG. 7 is a plan view showing a rotor-side surface of a vibrating body according to a third embodiment of the present invention.
【図８】本発明の第４実施例における振動体のロータ側
表面を示す平面図である。FIG. 8 is a plan view showing a rotor-side surface of a vibrating body according to a fourth embodiment of the present invention.
【図９】本発明の第５実施例である超音波モータの断面
図である。FIG. 9 is a sectional view of an ultrasonic motor according to a fifth embodiment of the present invention.
【図１０】超音波モータにおける圧電素子の構造と振動
体の突起との位置関係を示す図である。FIG. 10 is a diagram showing a positional relationship between a structure of a piezoelectric element and a protrusion of a vibrating body in an ultrasonic motor.
【図１１】振動体の振動に基づく突起の動きとロータの
回転との関係を説明する図である。FIG. 11 is a diagram illustrating the relationship between the movement of the protrusion and the rotation of the rotor based on the vibration of the vibrating body.
【図１２】摩擦により駆動する超音波モータの構造を示
す断面図である。FIG. 12 is a cross-sectional view showing the structure of an ultrasonic motor driven by friction.
１ 振動体 ２ 突起 ３ ロータ ４ 圧電素子 ５ 支持台 ５’シャーシ ６ 中心軸 ７ 軸受 ８ 付着部材 ９ ピボット 10加圧バネ 11リード基板 12歯車 13 遮蔽板 1 vibrating body 2 protrusions 3 rotor 4 Piezoelectric element 5 support 5'chassis 6 central axis 7 bearings 8 Adhesive members 9 pivots 10 Pressure spring 11 lead board 12 gears 13 Shield
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H680 AA12 BB02 BB16 CC06 DD02 DD13 DD23 DD63 DD66 DD73 EE01 ─────────────────────────────────────────────────── ─── Continued front page F term (reference) 5H680 AA12 BB02 BB16 CC06 DD02 DD13 DD23 DD63 DD66 DD73 EE01
Claims (7)
体の接触部分近傍に、摩擦粉を捕獲する付着部材を配備
するようにしたことを特徴とする超音波モータ。1. An ultrasonic motor characterized in that an adhering member for trapping friction powder is provided near a contact portion between a rotor and a vibrating body of the frictionally driven ultrasonic motor.
又はシャーシのロータ側表面部分に摩擦粉を捕獲する付
着部材を配備するようにしたことを特徴とする超音波モ
ータ。2. A support base for an ultrasonic motor driven by friction and / or
Alternatively, an ultrasonic motor is characterized in that an attachment member for capturing friction powder is provided on a surface portion of the chassis on the rotor side.
請求項１または２に記載の超音波モータ。3. The ultrasonic motor according to claim 1, wherein the adhering member is charged with a blue charge.
たは２に記載の超音波モータ。4. The ultrasonic motor according to claim 1, wherein the surface of the attachment member is an adhesive.
タ側表面における接触部分以外の径領域の概ね全体であ
る請求項１乃至４のいずれかに記載の超音波モータ。5. The ultrasonic motor according to claim 1, wherein the position where the adhering member is provided is substantially the entire radial region of the rotor-side surface of the vibrating body other than the contact portion.
ードにおいて節となる振動体のロータ側表面部分である
請求項１乃至４のいずれかに記載の超音波モータ。6. The ultrasonic motor according to claim 1, wherein the position where the adhering member is disposed is a rotor-side surface portion of the vibrating body that serves as a node in the drive vibration mode.
た請求項１乃至６のいずれかに記載の超音波モータ。7. The ultrasonic motor according to claim 1, further comprising a cylindrical shield plate surrounding the bearing portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002035535A JP2003244976A (en) | 2002-02-13 | 2002-02-13 | Ultrasonic motor having abrasion particles scatter preventive function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002035535A JP2003244976A (en) | 2002-02-13 | 2002-02-13 | Ultrasonic motor having abrasion particles scatter preventive function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003244976A true JP2003244976A (en) | 2003-08-29 |
Family
ID=27777703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002035535A Pending JP2003244976A (en) | 2002-02-13 | 2002-02-13 | Ultrasonic motor having abrasion particles scatter preventive function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003244976A (en) |
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| WO2006043456A1 (en) * | 2004-10-20 | 2006-04-27 | Kyocera Corporation | Camera module, and portable terminal and information terminal with the same |
| JP2006119248A (en) * | 2004-10-20 | 2006-05-11 | Kyocera Corp | Camera module and portable terminal having the same |
| JP2006187114A (en) * | 2004-12-27 | 2006-07-13 | Olympus Corp | Ultrasonic motor |
| JP2007047731A (en) * | 2006-01-17 | 2007-02-22 | Kyocera Corp | Camera module and information terminal with camera module |
| JP2007047457A (en) * | 2005-08-10 | 2007-02-22 | Kyocera Corp | Camera module and information terminal with camera module |
| JP2007047458A (en) * | 2005-08-10 | 2007-02-22 | Kyocera Corp | Camera module and information terminal with camera module |
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| JP2021132452A (en) * | 2020-02-19 | 2021-09-09 | キヤノン株式会社 | Vibration type motor, lens device, and electronic apparatus |
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2002
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119248A (en) * | 2004-10-20 | 2006-05-11 | Kyocera Corp | Camera module and portable terminal having the same |
| WO2006043456A1 (en) * | 2004-10-20 | 2006-04-27 | Kyocera Corporation | Camera module, and portable terminal and information terminal with the same |
| KR101159385B1 (en) | 2004-10-20 | 2012-07-03 | 교세라 가부시키가이샤 | Camera module, and portable terminal and information terminal with the same |
| JP4659450B2 (en) * | 2004-12-27 | 2011-03-30 | オリンパス株式会社 | Ultrasonic motor |
| JP2006187114A (en) * | 2004-12-27 | 2006-07-13 | Olympus Corp | Ultrasonic motor |
| JP2007047457A (en) * | 2005-08-10 | 2007-02-22 | Kyocera Corp | Camera module and information terminal with camera module |
| JP2007047458A (en) * | 2005-08-10 | 2007-02-22 | Kyocera Corp | Camera module and information terminal with camera module |
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| JP2021132452A (en) * | 2020-02-19 | 2021-09-09 | キヤノン株式会社 | Vibration type motor, lens device, and electronic apparatus |
| JP7016898B2 (en) | 2020-02-19 | 2022-02-07 | キヤノン株式会社 | Vibration type motors, lens devices, and electronic devices |
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