JP3371041B2 - Magnet movable linear actuator - Google Patents
Magnet movable linear actuatorInfo
- Publication number
- JP3371041B2 JP3371041B2 JP29379194A JP29379194A JP3371041B2 JP 3371041 B2 JP3371041 B2 JP 3371041B2 JP 29379194 A JP29379194 A JP 29379194A JP 29379194 A JP29379194 A JP 29379194A JP 3371041 B2 JP3371041 B2 JP 3371041B2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- cylindrical
- linear actuator
- movable
- permanent magnet
- 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 - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 230000005415 magnetization Effects 0.000 claims description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 150000002910 rare earth metals Chemical group 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004043 responsiveness Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、自動車のアクティブ
サスペンション等の振動制御機器をはじめ各種工作機械
等、広範囲の分野で使用される磁石可動形リニアアクチ
ュエータの改良に係り、例えば、可動子を構成する永久
磁石構成体に外周面から軸方向両端面に向かって偏倚す
るよう着磁した円筒状ボンド磁石を用いて、磁気効率が
良く小型で生産性を向上させた磁石可動形リニアアクチ
ュエータに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a movable magnet linear actuator used in a wide range of fields such as vibration control equipment such as an active suspension of an automobile, various machine tools and the like, and for example, a movable element is constructed. The present invention relates to a movable magnet type linear actuator having good magnetic efficiency, small size, and improved productivity by using a cylindrical bonded magnet that is magnetized so as to be biased from the outer peripheral surface toward both end surfaces in the axial direction in the permanent magnet structure.
【０００２】[0002]
【従来の技術】従来から、自動車のアクティブサスペン
ションの振動制御機器等に使用される電磁アクチュエー
タとしては、ＶＣＭ（ボイスコイル型リニアモータ）に
代表されるような電流力を利用したリニアアクチュエー
タが使用されていた。2. Description of the Related Art Conventionally, as an electromagnetic actuator used in a vibration control device for an active suspension of an automobile, a linear actuator utilizing a current force as represented by a VCM (voice coil linear motor) has been used. Was there.
【０００３】電流力を利用したリニアアクチュエータ
は、周波数応答性は良いが、体積あたりの発生推力があ
まり大きくないことから、大推力を得るためには全体的
な外径寸法が大きくなり、また、磁石使用量も多くな
り、必ずしも磁気効率が良い構成とは言い難かった。最
近では、これらの分野に、大推力が得られ、比較的磁石
の使用量が少なく、体積あたりの発生推力が大きな磁石
可動形リニアアクチュエータ、すなわち、磁気力を利用
したリニアアクチュエータの採用が検討されている（１
９９２年６月社団法人電気学会発行 電気学会リニアド
ライブ研究会資料ＬＤ−９２−４６「可動磁石型アクチ
ュエータ推力向上に関する検討」、１９９３年１１月
社団法人電気学会発行 電気学会リニアドライブ研究会
資料ＬＤ−９３−８７ 「小型リニアアクチュエータの
研究」）。A linear actuator utilizing current force has a good frequency response, but since the generated thrust force per volume is not so large, the overall outer diameter dimension becomes large in order to obtain a large thrust force. The amount of magnets used has increased, and it has been difficult to say that the structure has good magnetic efficiency. Recently, in these fields, the adoption of a movable magnetic linear actuator that can obtain a large thrust force, a relatively small amount of magnet used, and a large thrust force per volume, that is, a linear actuator that utilizes a magnetic force has been studied. (1
June 992 Published by The Institute of Electrical Engineers of Japan Material of the Institute of Electrical Engineers Linear Drive Study Material LD-92-46 "Study on Improving Thrust of Movable Magnet Actuator", November 1993
Published by The Institute of Electrical Engineers of Japan The Institute of Electrical Engineers Linear Drive Study Material LD-93-87 "Study on Small Linear Actuators").
【０００４】従来から知られる磁石可動形リニアアクチ
ュエータの基本的な構成を図８および図９に示す。図８
は全体の概要構成を示す縦断面説明図であり、図９は可
動子を示す縦断面説明図である。図中１は可動子であ
り、円筒状永久磁石構成体１１を円筒状の可動ヨーク１
２を介して出力軸１３に固着した構成からなっている。
特に、円筒状永久磁石構成体１１は、希土類系焼結磁石
からなる一対のラジアル方向に磁化された円筒状永久磁
石１１ｃ，１１ｄを、その磁化の向き（図中の矢印にて
示す向き）が交互に逆向きになるように、すなわち軸方
向に異磁極を交互に形成するようにして隣接配置した構
成からなっている。The basic construction of a conventionally known magnet movable linear actuator is shown in FIGS. 8 and 9. Figure 8
FIG. 9 is a vertical cross-sectional explanatory view showing the overall schematic configuration, and FIG. 9 is a vertical cross-sectional explanatory view showing the mover. In the figure, reference numeral 1 is a mover, and a cylindrical permanent magnet structure 11 is provided with a cylindrical movable yoke 1
It is configured to be fixed to the output shaft 13 via 2.
In particular, the cylindrical permanent magnet structure 11 has a pair of radially magnetized cylindrical permanent magnets 11c and 11d made of a rare earth-based sintered magnet whose magnetization direction (direction shown by an arrow in the figure) is The magnetic poles are arranged adjacent to each other so that they are alternately oriented in opposite directions, that is, different magnetic poles are alternately formed in the axial direction.
【０００５】図中２は固定子であり、円筒状の固定ヨー
ク２１の内周部に、前記可動子１の円筒状永久磁石構成
体１１と所定の空隙を形成して対向配置する磁極部２２
を有し、特に、磁極部２２は複数の磁極２２ａ，２２
ｂ，２２ｃからなり、これらの磁極２２ａ，２２ｂ，２
２ｃが軸方向に異磁極を交互に形成するよう駆動コイル
２３を巻回配置した構成からなっている。図中３は可動
子１の支持部であり、可動子１の出力軸１３を軸受３１
を介して軸方向（図中左右方向）移動可能に支持するフ
ランジ部３２から構成され、該フランジ部３２が固定子
２の各々端部に固着されている。In the figure, reference numeral 2 denotes a stator, and a magnetic pole portion 22 is disposed in the inner peripheral portion of a cylindrical fixed yoke 21 so as to face the cylindrical permanent magnet structure 11 of the mover 1 with a predetermined gap therebetween.
In particular, the magnetic pole portion 22 has a plurality of magnetic poles 22a and 22a.
b, 22c, and these magnetic poles 22a, 22b, 2
2c has a configuration in which the drive coil 23 is wound and arranged so that different magnetic poles are alternately formed in the axial direction. Reference numeral 3 in the figure denotes a support portion of the mover 1, and the output shaft 13 of the mover 1 is supported by the bearing 31.
It is composed of a flange portion 32 that is movably supported in the axial direction (left and right direction in the figure) via the flange portion 32, and the flange portion 32 is fixed to each end portion of the stator 2.
【０００６】以上の構成において、駆動コイル２３に所
定方向の電流を通電すると、固定子２の磁極部２２に軸
方向に異磁極が交互に形成され、可動子１の円筒状永久
磁石構成体１１を構成する一対の円筒状永久磁石１１
ｃ，１１ｄとの磁気的作用により、可動子１が軸方向に
移動する。図８では、可動子１を構成する円筒状永久磁
石構成体１１が一対の円筒状永久磁石からなる最も基本
的な磁石可動形リニアアクチュエータの例を示したが、
要求される推力等に応じてこれら円筒状永久磁石の数量
とともに、固定子２の磁極部２２を構成する各々磁極の
数量を増加した構成等が知られている。In the above structure, when a current is applied to the drive coil 23 in a predetermined direction, different magnetic poles are alternately formed in the magnetic pole portion 22 of the stator 2 in the axial direction, and the cylindrical permanent magnet structure 11 of the mover 1 is formed. Of a pair of cylindrical permanent magnets 11
The mover 1 moves in the axial direction by the magnetic action with c and 11d. FIG. 8 shows an example of the most basic magnet movable linear actuator in which the cylindrical permanent magnet structure 11 that constitutes the mover 1 is composed of a pair of cylindrical permanent magnets.
It is known that the number of these cylindrical permanent magnets is increased in accordance with the required thrust force and the number of each magnetic pole forming the magnetic pole portion 22 of the stator 2 is increased.
【０００７】[0007]
【発明が解決しようとする課題】従来の磁石可動形リニ
アアクチュエータにおいては、先に説明したように可動
子を構成する円筒状永久磁石構成体として、希土類系焼
結磁石からなるラジアル方向に磁化された円筒状永久磁
石が使用されていた。しかし、希土類系焼結磁石からな
る円筒状永久磁石は、その寸法等によっては一体品とし
て歩留りよく生産することができず、通常、複数の断面
弓形状希土類系焼結磁石を円筒状可動ヨークの外周面に
接着固定して、全体として円筒状を形成するようにして
用いていた。このような、構成は可動子の生産性の点か
ら望ましくないだけでなく、作動中の断面弓形状希土類
系焼結磁石の脱落等が懸念され、信頼性の点からも望ま
しい構成とは言い難いものであった。In the conventional movable magnet type linear actuator, as the cylindrical permanent magnet structure which constitutes the mover as described above, it is magnetized in the radial direction of the rare earth sintered magnet. A cylindrical permanent magnet was used. However, a cylindrical permanent magnet made of a rare earth-based sintered magnet cannot be produced as an integrated product with a high yield depending on its size and the like. It was used by being bonded and fixed to the outer peripheral surface so as to form a cylindrical shape as a whole. Such a configuration is not desirable from the viewpoint of the productivity of the mover, and there is concern that the rare earth-based sintered magnet with a bow-shaped cross section may come off during operation. It was a thing.
【０００８】さらに、各々の円筒状永久磁石はラジアル
方向に磁化される構成であることから、隣接配置する各
々の円筒状永久磁石が有する磁気特性を有効に活用する
ためには、互いの円筒状永久磁石間に効率的な磁路を形
成することが必要となり、可動ヨークの配置が必須の要
件となる。この可動ヨークの配置は可動子の全体重量を
大きくする要因となっており、特に、推力の向上を実現
させるために円筒状永久磁石を大きくすると必然的に可
動ヨークも大きくなり、要求される応答性を実現するこ
とが困難となる。Further, since the respective cylindrical permanent magnets are magnetized in the radial direction, in order to effectively utilize the magnetic characteristics of the respective adjacent cylindrical permanent magnets, the cylindrical permanent magnets have a cylindrical shape. It is necessary to form an efficient magnetic path between the permanent magnets, and the arrangement of the movable yoke is an essential requirement. This disposition of the movable yoke is a factor that increases the overall weight of the mover, and in particular, when the cylindrical permanent magnet is increased in order to improve the thrust, the movable yoke also inevitably increases in size and the required response. It becomes difficult to realize the sex.
【０００９】また、最近では、リニアアクチュエータの
分野においても、形状の任意性や寸法精度の良さ等の観
点から、種々のボンド磁石を採用することが検討されて
いるものの、磁石の本質的な磁気特性が焼結磁石と比べ
て低く、従来の磁石可動形リニアアクチュエータを構成
する円筒状永久磁石を単にボンド磁石に置き換えるだけ
では、要求される推力を得ることができなかった。Recently, in the field of linear actuators, although various bond magnets have been studied from the viewpoint of arbitrariness of shape and good dimensional accuracy, the essential magnetism of the magnets is considered. The characteristics are lower than those of sintered magnets, and the required thrust could not be obtained simply by replacing the cylindrical permanent magnet that constitutes the conventional movable magnet linear actuator with a bond magnet.
【００１０】この発明は、以上に説明したような従来の
磁石可動形リニアアクチュエータが有する問題点を解決
することが主たる目的であり、特に、可動子を構成する
円筒状永久磁石を改良することで、可動子の構造を簡素
化し、生産性が良く信頼性の高い磁石可動形リニアアク
チュエータの提供を目的とするものである。また、可動
子の軽量化を実現し、推力とともに応答性の向上を可能
とする磁石可動形リニアアクチュエータの提供を目的と
する。The present invention is mainly aimed at solving the problems of the conventional magnet movable type linear actuator as described above, and in particular, by improving the cylindrical permanent magnet constituting the mover. It is an object of the present invention to provide a movable magnet type linear actuator that simplifies the structure of the mover and has high productivity and high reliability. Another object of the present invention is to provide a movable magnet type linear actuator that realizes weight reduction of a mover and can improve responsiveness as well as thrust.
【００１１】[0011]
【課題を解決するための手段】この発明は、従来の磁石
可動形リニアアクチュエータが有する問題点を解決する
ために、特に、可動子の構成に着目し種々検討した結
果、円筒状永久磁石構成体を構成する円筒状永久磁石
に、特定方向に磁路を形成するように着磁されたボンド
磁石を用いて構成することにより、従来の構成において
必須要素であった可動ヨークの配置を不要とし、ボンド
磁石が有する磁気特性を最も効率的に活用することによ
って、目的を達成したものである。SUMMARY OF THE INVENTION In order to solve the problems of the conventional movable magnet type linear actuator, the present invention has focused on the structure of the mover, and as a result of various studies, a cylindrical permanent magnet structure has been obtained. By using a bonded magnet magnetized so as to form a magnetic path in a specific direction in the cylindrical permanent magnet constituting the above, it is unnecessary to dispose the movable yoke, which is an essential element in the conventional configuration, The object was achieved by making the most efficient use of the magnetic characteristics of the bonded magnet.
【００１２】すなわち、この発明は、外周面の軸方向に
異磁極を交互に形成してなる円筒状永久磁石構成体を軸
に固着してなる可動子と、内周面の軸方向に異磁極を交
互に形成するよう駆動コイルを巻回配置してなる磁極部
を有する固定子とを有し、前記円筒状永久磁石構成体の
外周面磁極形成部と固定子内周面磁極部とを所定の空隙
を形成して対向配置してなる磁石可動形リニアアクチュ
エータにおいて、前記円筒状永久磁石構成体が軸に直接
固着し隣接配置する少なくとも一対の円筒状ボンド磁石
からなり、かつ各々の円筒状ボンド磁石を外周面から軸
方向両端面に向かって偏倚する磁路を形成するととも
に、隣接配置する各々円筒状ボンド磁石の磁化の向きが
交互に逆向きになるように着磁して外周面の軸方向に異
磁極を交互に形成したことを特徴とする磁石可動形リニ
アアクチュエータである。ここで、円筒状永久磁石構成
体を構成する少なくとも一対の円筒状ボンド磁石とは、
当該永久磁石構成体の表面にＮ極とＳ極の対が最低限一
つあれば良いことから最小、２個の円筒状ボンド磁石で
構成されることを意味し、このＮ極とＳ極の対が複数対
で円筒状ボンド磁石が偶数個であってもよいほか、例え
ば、当該永久磁石構成体の表面にＮ極、Ｓ極、Ｎ極が現
れる如く、円筒状ボンド磁石が奇数個で構成されてもよ
く、奇数個（奇数極）で構成される場合は、磁気的バラ
ンスを考慮して、軸方向の磁石寸法、ピッチ等を調整す
ると良い。Namely, the present invention is the axial cylindrical permanent magnet arrangement in the axial direction of the outer circumferential surface by forming a different magnetic poles alternately
A movable element formed by sticking to, and a stator having a magnetic pole portion formed by arranging winding the drive coil so as to form a different magnetic poles alternately in the axial direction of the inner peripheral surface, said cylindrical permanent magnet arrangement of a body
There is a predetermined gap between the magnetic pole forming portion on the outer peripheral surface and the magnetic pole portion on the inner peripheral surface of the stator.
In a movable magnet type linear actuator, which is formed so as to face each other , the cylindrical permanent magnet structure is directly attached to the shaft.
Together when at least a pair of cylindrical bonded magnet, and forms a magnetic path for biasing towards the respective cylindrical bonded magnet from the outer peripheral surface in the axial direction end surfaces secured to the adjacent arrangement
, The direction of magnetization of the cylindrical bonded magnets adjacent to each other is
The magnets are magnetized so that they are alternately in opposite directions, and they differ in the axial direction of the outer peripheral surface.
This is a movable magnet type linear actuator characterized in that magnetic poles are formed alternately . Here, at least a pair of cylindrical bonded magnets constituting the cylindrical permanent magnet structure,
Since at least one pair of N pole and S pole is required on the surface of the permanent magnet structure, it means that it is composed of at least two cylindrical bonded magnets. There may be a plurality of pairs and an even number of cylindrical bonded magnets. For example, an odd number of cylindrical bonded magnets may be formed so that N poles, S poles, and N poles appear on the surface of the permanent magnet structure. In the case of an odd number (odd number of poles), it is advisable to adjust the axial magnet size, pitch, etc. in consideration of magnetic balance.
【００１３】また、併せて、外周面の軸方向に異磁極を
交互に形成してなる円筒状永久磁石構成体を軸に固着し
てなる可動子と、内周面の軸方向に異磁極を交互に形成
するよう駆動コイルを巻回配置してなる磁極部を有する
固定子とを有し、前記円筒状永久磁石構成体の外周面磁
極形成部と固定子内周面磁極部とを所定の空隙を形成し
て対向配置してなる磁石可動形リニアアクチュエータに
おいて、前記円筒状永久磁石構成体が軸に直接固着する
とともに、外周面の軸方向に少なくとも一対の異磁極を
形成してなる円筒状ボンド磁石からなり、かつ前記の隣
接する異磁極間を略湾曲状に偏倚する磁路を形成するよ
うに着磁したことを特徴とする磁石可動形リニアアクチ
ュエータを提案する。ここで、外周面の軸方向に少なく
とも一対の異磁極を形成してなる円筒状ボンド磁石から
なる円筒状永久磁石構成体は、１つの円筒状ボンド磁石
のみで構成されるが、当該永久磁石構成体の表面には最
低限、Ｎ極とＳ極の一対の異磁極を形成するもので、Ｎ
極とＳ極の対が複数対のほか、表面にＮ極、Ｓ極、Ｎ極
が現れる如く、奇数極を形成することができ、奇数極の
場合に磁気的バランスを取ることは上述のとおりであ
る。In addition, a cylindrical permanent magnet assembly having alternating magnetic poles formed alternately on the outer peripheral surface is fixed to the shaft.
And a stator having a magnetic pole portion in which a drive coil is wound and arranged so as to alternately form different magnetic poles in the axial direction of the inner peripheral surface, and the outer periphery of the cylindrical permanent magnet structure. Magnetism
A predetermined gap is formed between the pole forming portion and the magnetic pole portion on the inner peripheral surface of the stator.
In a movable magnet type linear actuator that is opposed to each other, the cylindrical permanent magnet structure is directly fixed to the shaft.
At the same time, it is composed of a cylindrical bonded magnet in which at least a pair of different magnetic poles is formed in the axial direction of the outer peripheral surface, and is magnetized so as to form a magnetic path that deviates between the adjacent different magnetic poles in a substantially curved shape. We propose a movable magnet type linear actuator. Here, the cylindrical permanent magnet constructing body composed of the cylindrical bond magnet formed by forming at least a pair of different magnetic poles in the axial direction of the outer peripheral surface is composed of only one cylindrical bond magnet. At least a pair of different magnetic poles, N and S, are formed on the surface of the body.
In addition to a plurality of pairs of poles and S poles, odd poles can be formed so that N poles, S poles, and N poles appear on the surface. In the case of odd poles, magnetic balance is achieved as described above. Is.
【００１４】さらに、上記のいずれの磁石可動形リニア
アクチュエータにおいても好ましい構成として、円筒状
永久磁石構成体を構成する円筒状ボンド磁石が希土類ボ
ンド磁石であることを特徴とする磁石可動形リニアアク
チュエータを提案するものである。Furthermore, as a preferable structure in any of the above-mentioned movable magnet type linear actuators, there is provided a movable magnet type linear actuator in which the cylindrical bonded magnet constituting the cylindrical permanent magnet structure is a rare earth bonded magnet. It is a proposal.
【００１５】[0015]
【作用】この発明による磁石可動形リニアアクチュエー
タの作用を、図１および図２に示す一実施例に基づき詳
細に説明する。図１は全体の概要構成を示す縦断面説明
図であり、図２は可動子を示す縦断面説明図である。図
中１は可動子であり、一対の円筒状ボンド磁石１１ａ，
１１ｂからなる円筒状永久磁石構成体１１を出力軸１３
に直接固着した構成からなっている。この発明の特徴で
ある一対の円筒状ボンド磁石１１ａ，１１ｂは、それぞ
れ外周面から軸方向両端面に向かって偏倚する磁路を形
成するように着磁されており、かつその磁化の向き（図
中の矢印にて示す向き）が交互に逆向きになるように、
すなわち軸方向に異磁極を交互に形成するようにして隣
接配置している。The operation of the movable magnet linear actuator according to the present invention will be described in detail with reference to an embodiment shown in FIGS. FIG. 1 is a vertical cross-sectional explanatory view showing the overall schematic configuration, and FIG. 2 is a vertical cross-sectional explanatory view showing a mover. In the figure, 1 is a mover, which is a pair of cylindrical bonded magnets 11a,
The cylindrical permanent magnet structure 11 made of 11b is attached to the output shaft 13
It is configured to be fixed directly to the. The pair of cylindrical bonded magnets 11a and 11b, which is a feature of the present invention, are magnetized so as to form magnetic paths that are deviated from the outer peripheral surface toward both axial end surfaces, and the direction of magnetization (Fig. So that the directions indicated by the arrows inside) are alternately reversed.
That is, the different magnetic poles are arranged adjacently so as to be alternately formed in the axial direction.
【００１６】図中２は固定子であり、従来の磁石可動形
リニアアクチュエータと本質的に同様な構成からなる。
すなわち、円筒状の固定ヨーク２１の内周部に、前記可
動子１の円筒状永久磁石構成体１１と所定の空隙を形成
して対向配置する磁極部２２を有し、特に、磁極部２２
は複数の磁極２２ａ，２２ｂ，２２ｃからなり、これら
の磁極２２ａ，２２ｂ，２２ｃが軸方向に異磁極を交互
に形成するよう駆動コイル２３を巻回配置した構成から
なっている。図中３は可動子１の支持部であり、可動子
１の出力軸１３を軸受３１を介して軸方向（図中左右方
向）移動可能に支持するフランジ部３２から構成され、
該フランジ部３２が固定子２の各々端部に固着されてい
る。In the figure, reference numeral 2 denotes a stator, which has essentially the same structure as a conventional magnet movable linear actuator.
That is, on the inner peripheral portion of the cylindrical fixed yoke 21, there is provided a magnetic pole portion 22 that is arranged to face the cylindrical permanent magnet structure 11 of the mover 1 with a predetermined gap, and in particular, the magnetic pole portion 22.
Is composed of a plurality of magnetic poles 22a, 22b, 22c, and the drive coil 23 is wound and arranged so that these magnetic poles 22a, 22b, 22c alternately form different magnetic poles in the axial direction. Reference numeral 3 in the drawing denotes a support portion of the mover 1, which is composed of a flange portion 32 that supports the output shaft 13 of the mover 1 via a bearing 31 so as to be movable in the axial direction (left-right direction in the drawing)
The flange 32 is fixed to each end of the stator 2.
【００１７】以上の構成において、駆動コイル２３に所
定方向の電流を通電すると、固定子２の磁極部２２に軸
方向に異磁極が交互に形成され、可動子１の円筒状永久
磁石構成体１１を構成する一対の円筒状ボンド磁石１１
ａ，１１ｂとの磁気的作用により、可動子１が軸方向に
移動する。図１および図２から明らかなように、この発
明による磁石可動形リニアアクチュエータにおいては、
可動子１を構成する一対の円筒状ボンド磁石１１ａ，１
１ｂと出力軸１３とが可動ヨーク（図８および図９参
照）を介することなく直接固着した構成からなるが、各
々の円筒状ボンド磁石１１ａ，１１ｂが外周面から軸方
向両端面に向かって偏倚する磁路を形成するように着磁
されていることから、可動ヨークがなくとも隣接配置す
る各々の円筒状ボンド磁石１１ａ，１１ｂ間に効率的な
磁路を形成することが可能となり、ボンド磁石が有する
磁気特性を最も効果的に発現することができるのであ
る。In the above structure, when a current is applied to the drive coil 23 in a predetermined direction, different magnetic poles are alternately formed in the magnetic pole portion 22 of the stator 2 in the axial direction, and the cylindrical permanent magnet structure 11 of the mover 1 is formed. Of a pair of cylindrical bonded magnets 11
The mover 1 moves in the axial direction by the magnetic action with a and 11b. As apparent from FIGS. 1 and 2, in the movable magnet linear actuator according to the present invention,
A pair of cylindrical bonded magnets 11a, 1 forming the mover 1.
1b and the output shaft 13 are directly fixed to each other without a movable yoke (see FIGS. 8 and 9), but the cylindrical bonded magnets 11a and 11b are biased from the outer peripheral surface toward both axial end surfaces. Since it is magnetized so as to form a magnetic path, it becomes possible to form an efficient magnetic path between the adjacent cylindrical bonded magnets 11a and 11b without a movable yoke. The magnetic properties possessed by can be most effectively expressed.
【００１８】可動ヨークを不要とすることによって、可
動子１の構造が簡素化され、また、作動中に円筒状ボン
ド磁石１１ａ，１１ｂが脱落する等の懸念もなく、生産
性が良く信頼性の高い磁石可動形リニアアクチュエータ
の提供を可能とする。特に、可動ヨークを不要とするこ
とは、従来の可動ヨークに相当する部分までもボンド磁
石にて形成することができ、可動子の全体重量を増やす
ことなく磁石体積を大きくすることが可能となり、推力
向上や応答性向上に効果的な構成であると言える。By eliminating the need for a movable yoke, the structure of the mover 1 is simplified, and there is no concern that the cylindrical bonded magnets 11a, 11b will fall off during operation, resulting in good productivity and high reliability. It is possible to provide a high linear magnet movable actuator. In particular, by eliminating the need for a movable yoke, even a portion corresponding to a conventional movable yoke can be formed with a bonded magnet, and the magnet volume can be increased without increasing the overall weight of the mover. It can be said that this structure is effective for improving thrust and responsiveness.
【００１９】可動子１を構成する円筒状ボンド磁石１１
ａ，１１ｂは、等方性の円筒状ボンド磁石を図３に示す
着磁器４０にて着磁することによって得られる。例え
ば、等方性の円筒状ボンド磁石１１ａを、該円筒状ボン
ド磁石１１ａの各々端面に当接する円柱状磁極部４１
ａ，４１ｂと円筒状ボンド磁石１１ａの外周面軸方向中
央部に当接する環状磁極部４２とを有する着磁ヨーク内
に配置し、前記円柱状磁極部４１ａ，４１ｂの周囲に巻
回配置した一対の励磁コイル４３ａ，４３ｂに所定方向
の電流を印加することによって、図中の破線にて示す磁
路を形成し、目的とする円筒状ボンド磁石を得ることが
できる。また、他の構成として、あらかじめ円筒状ボン
ド磁石の成形時に上記と同様な磁化を施すことによっ
て、円筒状ボンド磁石が外周面から軸方向両端面に向か
って偏倚する磁路を形成するように配向された所謂異方
性ボンド磁石を用いることも磁気特性の点から有効であ
る。Cylindrical bonded magnet 11 constituting the mover 1
a and 11b are obtained by magnetizing an isotropic cylindrical bonded magnet with the magnetizer 40 shown in FIG. For example, an isotropic cylindrical bonded magnet 11a is in contact with each end face of the cylindrical bonded magnet 11a, and a cylindrical magnetic pole portion 41 is provided.
a, 41b and a ring-shaped magnetic pole portion 42 that abuts on the central portion in the axial direction of the outer peripheral surface of the cylindrical bonded magnet 11a, the pair being wound around the cylindrical magnetic pole portions 41a, 41b. By applying a current in a predetermined direction to the exciting coils 43a and 43b, the magnetic path shown by the broken line in the drawing can be formed, and the target cylindrical bonded magnet can be obtained. As another configuration, when the cylindrical bonded magnet is formed in advance by applying the same magnetization as described above, the cylindrical bonded magnet is oriented so as to form a magnetic path that is biased from the outer peripheral surface toward both axial end surfaces. It is also effective to use the so-called anisotropic bonded magnet described above in terms of magnetic characteristics.
【００２０】上記のような特定方向に磁路を形成するよ
うに着磁された円筒状ボンド磁石を軸方向に複数対配置
することによって図４に示すような磁石可動形リニアア
クチュエータを得ることができる。すなわち、図４にお
いて、１は複数対の円筒状ボンド磁石からなる円筒状永
久磁石構成体１１を出力軸１３に固着してなる可動子で
あり、また、２は前記円筒状永久磁石構成体１１の外周
面に形成される磁極数に応じて複数の磁極を有する磁極
部２２を固定ヨーク２１の内周部に形成してなる固定子
である。A magnet movable linear actuator as shown in FIG. 4 can be obtained by arranging a plurality of pairs of cylindrical bonded magnets magnetized so as to form a magnetic path in a specific direction as described above in the axial direction. it can. That is, in FIG. 4, reference numeral 1 denotes a mover in which a cylindrical permanent magnet structure 11 composed of a plurality of pairs of cylindrical bonded magnets is fixed to the output shaft 13, and 2 denotes the cylindrical permanent magnet structure 11. Is a stator formed by forming a magnetic pole portion 22 having a plurality of magnetic poles according to the number of magnetic poles formed on the outer peripheral surface of the fixed yoke 21 on the inner peripheral portion thereof.
【００２１】図５に示す可動子１は、この発明の他の一
実施例からなる磁石可動形リニアアクチュエータを構成
する可動子の縦断面説明図である。すなわち、先に説明
した図２に示す可動子においては、円筒状永久磁石構成
体を一対の円筒状ボンド磁石から構成した場合を示した
が、図５に示す可動子は一つの円筒状ボンド磁石のみを
配置した円筒状永久磁石構成体を使用することで図２に
示す可動子と同様な効果を得ることができる。A mover 1 shown in FIG. 5 is a longitudinal cross-sectional explanatory view of a mover which constitutes a movable magnet type linear actuator according to another embodiment of the present invention. That is, in the mover shown in FIG. 2 described above, the case where the cylindrical permanent magnet structure is composed of a pair of cylindrical bonded magnets is shown. However, the mover shown in FIG. 5 is one cylindrical bonded magnet. The same effect as that of the mover shown in FIG. 2 can be obtained by using the cylindrical permanent magnet structure in which only the magnets are arranged.
【００２２】図５において、１１は外周面の軸方向に一
対の異磁極を形成する一つの円筒状ボンド磁石からなる
円筒状永久磁石構成体であり、出力軸１３に可動ヨーク
を介することなく直接固着した構成からなっている。こ
の円筒状ボンド磁石は、隣接する異磁極間を略湾曲状に
偏倚する磁路を形成するよう（図中の矢印にて示す方
向）に着磁されており、結果として円筒状永久磁石構成
体１１の外周面の軸方向に一対の異磁極を形成してい
る。このような構成からなる円筒状永久磁石構成体１１
を有する可動子１を図１に示す固定子２内に配置するこ
とで、図１に示す磁石可動形リニアアクチュエータと同
様な作用効果を有する磁石可動形リニアアクチュエータ
を得ることができる。In FIG. 5, reference numeral 11 denotes a cylindrical permanent magnet structure composed of one cylindrical bonded magnet which forms a pair of different magnetic poles in the axial direction of the outer peripheral surface, and which is directly connected to the output shaft 13 without a movable yoke. It consists of a fixed structure. The cylindrical bonded magnet is magnetized so as to form a magnetic path that deviates between adjacent different magnetic poles in a substantially curved shape (direction shown by an arrow in the figure), and as a result, the cylindrical permanent magnet structure is formed. A pair of different magnetic poles are formed on the outer peripheral surface of the shaft 11 in the axial direction. Cylindrical permanent magnet structure 11 having such a structure
By arranging the mover 1 having the above in the stator 2 shown in FIG. 1, it is possible to obtain a magnet movable linear actuator having the same effect as that of the magnet movable linear actuator shown in FIG.
【００２３】図５に示す可動子１を構成する一つの円筒
状ボンド磁石からなる円筒状永久磁石構成体１１は、等
方性の円筒状ボンド磁石を図６に示す着磁器５０にて着
磁することによって得られる。例えば、等方性の円筒状
ボンド磁石１１ｅを、該円筒状ボンド磁石１１ｅの外周
面軸方向の２箇所にて当接する環状磁極部５２ａ，５２
ｂを有する略円筒状の着磁ヨーク内に配置し、該環状磁
極部５２ａ，５２ｂ間に巻回配置した励磁コイル５３に
所定方向の電流を印加することによって、図中の破線に
て示す磁路を形成し、目的とする円筒状ボンド磁石を得
ることができる。また、他の構成として、あらかじめ円
筒状ボンド磁石の成形時に上記と同様な磁化を施すこと
によって、円筒状ボンド磁石が隣接する異磁極間を略湾
曲状に偏倚する磁路を形成するように配向された所謂異
方性ボンド磁石を用いることも磁気特性の点から有効で
ある。The cylindrical permanent magnet structure 11 composed of one cylindrical bonded magnet constituting the mover 1 shown in FIG. 5 is an isotropic cylindrical bonded magnet magnetized by the magnetizer 50 shown in FIG. It is obtained by doing. For example, the isotropic cylindrical bonded magnet 11e is in contact with the annular magnetic pole portions 52a, 52 at two positions in the axial direction of the outer peripheral surface of the cylindrical bonded magnet 11e.
The magnetic field indicated by the broken line in the figure is obtained by applying a current in a predetermined direction to the exciting coil 53 that is arranged in a substantially cylindrical magnetizing yoke having b and is wound between the annular magnetic pole portions 52a and 52b. By forming the path, the intended cylindrical bonded magnet can be obtained. As another configuration, when the cylindrical bonded magnet is formed in advance by applying the same magnetization as described above, the cylindrical bonded magnet is oriented so as to form a magnetic path that is biased between adjacent different magnetic poles in a substantially curved shape. It is also effective to use the so-called anisotropic bonded magnet described above in terms of magnetic characteristics.
【００２４】上記のような特定方向に磁路を形成するよ
うに着磁された円筒状ボンド磁石１１ｅを軸方向に複数
配置することも可能であり、また、図７に示すように長
尺の円筒状ボンド磁石１１ｆの軸方向外周面に複数の磁
極を形成することによって実質的に図４に示す構成と同
様な円筒状永久磁石構成体１１が得られ、同等の効果を
有する磁石可動形リニアアクチュエータを得ることがで
きる。特に、円筒状永久磁石構成体１１表面に奇数極を
配置する構成の場合は、着磁のみで容易に得られる。図
５示す可動子は、円筒状ボンド磁石と出力軸とを一体成
形にて製作することも可能であり、図２に示す可動子の
構成に比べ、工業的規模における生産性を一層向上する
ことができる。It is also possible to arrange a plurality of cylindrical bonded magnets 11e magnetized so as to form a magnetic path in the above-mentioned specific direction in the axial direction, and as shown in FIG. By forming a plurality of magnetic poles on the outer circumferential surface of the cylindrical bonded magnet 11f in the axial direction, a cylindrical permanent magnet structure 11 substantially similar to the structure shown in FIG. 4 can be obtained, and a magnet movable linear having the same effect. An actuator can be obtained. Particularly, in the case of a configuration in which odd poles are arranged on the surface of the cylindrical permanent magnet structure 11, it can be easily obtained by only magnetizing. The mover shown in FIG. 5 can also be manufactured by integrally molding the cylindrical bonded magnet and the output shaft, and further improves productivity on an industrial scale as compared with the structure of the mover shown in FIG. You can
【００２５】この発明の磁石可動形リニアアクチュエー
タにおける円筒状永久磁石構成体を構成する円筒状ボン
ド磁石としては、種々の材質からなるものが使用可能で
あり、磁気特性の点からはＦｅ−Ｂ−Ｎｄ系ボンド磁石
やＳｍ−Ｃｏ系ボンド磁石等の希土類ボンド磁石が好ま
しいが、特に残留磁束密度が高く、温度特性や着磁特性
に優れるＦｅ3Ｂ−Ｎｄ系ボンド磁石等の所謂スプリン
グ磁石（１９９３年７月 日本工業出版発行 新素材
第６３頁から第６７頁 「等方性高磁束密度Ｆｅ3Ｂ−
Ｎｄ系ボンド磁石」）の使用が好ましい。また、この発
明の磁石可動形リニアアクチュエータを構成する円筒状
固定ヨークをけい素鋼板の積層体にて構成することによ
って周波数特性を向上することができる。As the cylindrical bonded magnet constituting the cylindrical permanent magnet structure in the movable magnet linear actuator of the present invention, various materials can be used, and in view of magnetic characteristics, Fe-B- Rare earth bond magnets such as Nd-based bond magnets and Sm—Co-based bond magnets are preferable, but so-called spring magnets such as Fe 3 B—Nd-based bond magnets having particularly high residual magnetic flux density and excellent temperature characteristics and magnetization characteristics (1993). Published by Nippon Kogyo Publishing Co., Ltd. in July 2016
Page 63 to Page 67 "Isotropic high magnetic flux density Fe 3 B-
The use of Nd-based bonded magnets ") is preferable. Further, the frequency characteristic can be improved by forming the cylindrical fixed yoke constituting the movable magnet linear actuator of the present invention by a laminated body of silicon steel sheets.
【００２６】[0026]
実施例
円筒状永久磁石構成体を構成する円筒状ボンド磁石とし
て、残留磁束密度が０．６７Ｔ、最大エネルギー積が７
２ｋＪ／ｍ3からなる等方性Ｆｅ−Ｂ−Ｎｄ系ボンド磁
石を用いて図１に示すこの発明の磁石可動形リニアアク
チュエータを作成した。なお、可動子の外径寸法は３０
ｍｍであり、固定子の外径寸法は６８ｍｍであった。ま
た、各々円筒状ボンド磁石の外径は３０ｍｍであり内径
は６ｍｍであった。この磁石可動形リニアアクチュエー
タにおいて、５０．８Ｎの発生推力（最大値）を得るこ
とができた。また、図５に示す構成の可動子１を上記の
実施例と同一材料、寸法で作製し、磁石可動形リニアア
クチュエータを組立たところ、同様の発生推力が得られ
ることを確認した。Example As a cylindrical bonded magnet constituting a cylindrical permanent magnet structure, the residual magnetic flux density is 0.67T and the maximum energy product is 7
A magnet movable linear actuator of the present invention shown in FIG. 1 was prepared using an isotropic Fe—B—Nd based bonded magnet composed of 2 kJ / m 3 . The outer diameter of the mover is 30
mm, and the outer diameter dimension of the stator was 68 mm. The outer diameter of each cylindrical bonded magnet was 30 mm and the inner diameter was 6 mm. In this magnet movable type linear actuator, a generated thrust force (maximum value) of 50.8 N could be obtained. Further, when the mover 1 having the structure shown in FIG. 5 was manufactured with the same material and dimensions as those of the above-mentioned embodiment and a magnet movable type linear actuator was assembled, it was confirmed that the same generated thrust force was obtained.
【００２７】比較例
比較例として、円筒状永久磁石構成体を構成する円筒状
永久磁石に、残留磁束密度が１．２９Ｔ、最大エネルギ
ー積が２８７ｋＪ／ｍ3からなる６つの断面弓形状異方
性Ｆｅ−Ｂ−Ｎｄ系焼結磁石を用いて図８に示す従来の
磁石可動形リニアアクチュエータを作成した。なお、可
動子および固定子の外径寸法は上記の構成と同寸法とし
た。また、円筒状永久磁石の外径は３０ｍｍであり内径
は２４ｍｍであった。この比較例においては、本質的に
円筒状永久磁石構成体を構成する永久磁石の最大エネル
ギー積が大きいため、この発明の磁石可動形リニアアク
チュエータの発生推力（最大値）よりも大きな発生推力
を得ることが可能であったが、それぞれの永久磁石が有
する最大エネルギー積と発生推力との関係から算出され
る磁気効率の点からはこの発明の磁石可動形リニアアク
チュエータとほぼ同程度であることが確認された。Comparative Example As a comparative example, a cylindrical permanent magnet constituting a cylindrical permanent magnet structure was used, and six cross-section bow-shaped anisotropies having a residual magnetic flux density of 1.29 T and a maximum energy product of 287 kJ / m 3 were used. A conventional magnet movable type linear actuator shown in FIG. 8 was prepared using a Fe—B—Nd system sintered magnet. The outer diameters of the mover and the stator were the same as those in the above configuration. The cylindrical permanent magnet had an outer diameter of 30 mm and an inner diameter of 24 mm. In this comparative example, since the maximum energy product of the permanent magnet that essentially constitutes the cylindrical permanent magnet structure is large, a generated thrust force larger than the generated thrust force (maximum value) of the movable magnet linear actuator of the present invention is obtained. Although it was possible, it was confirmed that the magnetic efficiency is almost the same as the magnetic movable linear actuator of the present invention in terms of magnetic efficiency calculated from the relationship between the maximum energy product of each permanent magnet and the generated thrust. Was done.
【００２８】上記比較例のＦｅ−Ｂ−Ｎｄ系焼結磁石に
代えて、この発明の磁石可動形リニアアクチュエータに
使用した等方性Ｆｅ−Ｂ−Ｎｄ系ボンド磁石と同材質か
らなるラジアル方向に着磁した外径３０ｍｍで内径２４
ｍｍの円筒状ボンド磁石を配置した構成においては、こ
の発明の磁石可動形リニアアクチュエータの発生推力の
約８０％程度の推力しか得ることができなかった。Instead of the Fe-B-Nd system sintered magnet of the above-mentioned comparative example, a radial direction made of the same material as the isotropic Fe-B-Nd system bonded magnet used in the movable magnet linear actuator of the present invention is used. Magnetized outer diameter 30 mm and inner diameter 24
In the configuration in which the cylindrical bonded magnet of mm is arranged, only about 80% of the thrust generated by the movable magnet linear actuator of the present invention can be obtained.
【００２９】[0029]
【発明の効果】この発明は、特に、自動車のアクティブ
サスペンション等の振動制御機器として使用される磁石
可動形リニアアクチュエータに有効であり、可動子を構
成する円筒状永久磁石構成体を特定方向に磁路を形成す
るように着磁されたボンド磁石にて構成することによ
り、従来の構成において必須要素であった可動ヨークの
配置を不要とし、ボンド磁石が有する磁気特性を最も効
率的に活用することによって、可動子の構造を簡素化
し、生産性が良く信頼性の高い磁石可動形リニアアクチ
ュエータを提供できるとともに、可動子の軽量化を実現
し、推力とともに応答性の向上を可能にした磁石可動形
リニアアクチュエータを提供できる。INDUSTRIAL APPLICABILITY The present invention is particularly effective for a movable magnet type linear actuator used as a vibration control device such as an active suspension of an automobile, and magnetizes a cylindrical permanent magnet structure constituting a mover in a specific direction. By using a bonded magnet magnetized so as to form a path, the movable yoke, which is an essential element in the conventional structure, is not required, and the magnetic characteristics of the bonded magnet are utilized most efficiently. The simplified structure of the mover makes it possible to provide a highly productive and highly reliable magnet moveable linear actuator , and at the same time realizes weight reduction of the mover, which improves the thrust as well as the responsiveness. A linear actuator can be provided.
【図１】この発明の磁石可動形リニアアクチュエータの
一実施例を示す縦断面説明図である。FIG. 1 is an explanatory longitudinal sectional view showing an embodiment of a movable magnet linear actuator of the present invention.
【図２】図１の磁石可動形リニアアクチュエータを構成
する可動子を示す縦断面説明図である。FIG. 2 is an explanatory longitudinal sectional view showing a mover that constitutes the movable magnet linear actuator of FIG.
【図３】図２に示す可動子を構成する円筒状ボンド磁石
を作製する着磁装置の概略を示す縦断面説明図である。3 is a longitudinal cross-sectional explanatory view schematically showing a magnetizing device for producing a cylindrical bonded magnet that constitutes the mover shown in FIG.
【図４】この発明の磁石可動形リニアアクチュエータの
他の実施例を示す縦断面説明図である。FIG. 4 is an explanatory longitudinal sectional view showing another embodiment of the movable magnet linear actuator of the present invention.
【図５】この発明の磁石可動形リニアアクチュエータを
構成する他の可動子を示す縦断面説明図である。FIG. 5 is a vertical cross-sectional explanatory view showing another mover which constitutes the movable magnet linear actuator of the present invention.
【図６】図５に示す可動子を構成する円筒状ボンド磁石
を作製する着磁装置の概略を示す縦断面説明図である。6 is a vertical cross-sectional explanatory view showing an outline of a magnetizing device for producing a cylindrical bonded magnet forming the mover shown in FIG.
【図７】この発明の磁石可動形リニアアクチュエータを
構成する他の可動子を示す縦断面説明図である。FIG. 7 is a vertical cross-sectional explanatory view showing another mover which constitutes the movable magnet linear actuator of the present invention.
【図８】従来の磁石可動形リニアアクチュエータを示す
縦断面説明図である。FIG. 8 is a vertical cross-sectional explanatory view showing a conventional movable magnet linear actuator.
【図９】図８の磁石可動形リニアアクチュエータを構成
する可動子を示す縦断面説明図である。9 is an explanatory longitudinal sectional view showing a mover which constitutes the movable magnet linear actuator of FIG.
１ 可動子 ２ 固定子 ３ 支持部 １１ 円筒状永久磁石構成体 １１ａ，１１ｂ，１１ｅ，１１ｆ 円筒状ボンド磁石 １１ｃ，１１ｄ 円筒状永久磁石 １２ 可動ヨーク １３ 出力軸 ２１ 固定ヨーク ２２ 磁極部 ２２ａ，２２ｂ，２２ｃ 磁極 ２３ 駆動コイル ３１ 軸受 ３２ フランジ部 ４０，５０ 着磁器 ４１ａ，４１ｂ 円柱状磁極部 ４２，５２ａ，５２ｂ 環状磁極部 ４３ａ，４３ｂ，５３ 励磁コイル 1 mover 2 stator 3 Support 11 Cylindrical permanent magnet structure 11a, 11b, 11e, 11f Cylindrical bonded magnet 11c, 11d Cylindrical permanent magnet 12 movable yoke 13 Output shaft 21 Fixed yoke 22 Magnetic pole 22a, 22b, 22c magnetic poles 23 Drive coil 31 bearings 32 Flange 40,50 Magnetizer 41a, 41b cylindrical magnetic pole portion 42, 52a, 52b annular magnetic pole part 43a, 43b, 53 Excitation coil
Claims (3)
てなる円筒状永久磁石構成体を軸に固着してなる可動子
と、内周面の軸方向に異磁極を交互に形成するよう駆動
コイルを巻回配置してなる磁極部を有する固定子とを有
し、前記円筒状永久磁石構成体の外周面磁極形成部と固
定子内周面磁極部とを所定の空隙を形成して対向配置し
てなる磁石可動形リニアアクチュエータにおいて、前記
円筒状永久磁石構成体が軸に直接固着し隣接配置する少
なくとも一対の円筒状ボンド磁石からなり、かつ各々の
円筒状ボンド磁石を外周面から軸方向両端面に向かって
偏倚する磁路を形成するとともに、隣接配置する各々円
筒状ボンド磁石の磁化の向きが交互に逆向きになるよう
に着磁して外周面の軸方向に異磁極を交互に形成したこ
とを特徴とする磁石可動形リニアアクチュエータ。1. A mover having a cylindrical permanent magnet structure fixed to an axis, wherein different magnetic poles are alternately formed on the outer peripheral surface in the axial direction, and different magnetic poles are alternately formed on the inner peripheral surface in the axial direction. Yes a stator having a magnetic pole portion formed by arranging winding the drive coil so as to
The outer peripheral surface magnetic pole forming portion of the cylindrical permanent magnet structure.
The magnetic poles of the inner surface of the stator are arranged so as to face each other with a predetermined gap.
In the movable magnet linear actuator, the cylindrical permanent magnet structure is composed of at least a pair of cylindrical bonded magnets that are directly fixed to the shaft and arranged adjacent to each other, and each cylindrical bonded magnet has an outer periphery. A magnetic path that deviates from the surface toward both end faces in the axial direction is formed , and adjacent circles are arranged.
Make sure that the magnetization directions of the cylindrical bonded magnets are alternately reversed.
A movable magnet type linear actuator characterized in that different magnetic poles are alternately formed in the axial direction of the outer peripheral surface by magnetizing the magnet.
てなる円筒状永久磁石構成体を軸に固着してなる可動子
と、内周面の軸方向に異磁極を交互に形成するよう駆動
コイルを巻回配置してなる磁極部を有する固定子とを有
し、前記円筒状永久磁石構成体の外周面磁極形成部と固
定子内周面磁極部とを所定の空隙を形成して対向配置し
てなる磁石可動形リニアアクチュエータにおいて、前記
円筒状永久磁石構成体が軸に直接固着するとともに、外
周面の軸方向に少なくとも一対の異磁極を形成してなる
円筒状ボンド磁石からなり、かつ前記の隣接する異磁極
間を略湾曲状に偏倚する磁路を形成するように着磁した
ことを特徴とする磁石可動形リニアアクチュエータ。2. A form and comprising a cylindrical permanent magnet arrangement in the axial direction of the outer circumferential surface by forming a different magnetic poles alternately fixed to the shaft movable element, the different magnetic poles in the axial direction of the inner peripheral surface alternately Yes a stator having a magnetic pole portion formed by arranging winding the drive coil so as to
The outer peripheral surface magnetic pole forming portion of the cylindrical permanent magnet structure.
The magnetic poles of the inner surface of the stator are arranged so as to face each other with a predetermined gap.
In the movable magnet linear actuator, the cylindrical permanent magnet structure is directly fixed to the shaft, and at least a pair of different magnetic poles are formed in the axial direction of the outer peripheral surface of the cylindrical bonded magnet. A magnet movable type linear actuator characterized in that it is magnetized so as to form a magnetic path that deviates between adjacent different magnetic poles in a substantially curved shape.
ボンド磁石が希土類ボンド磁石であることを特徴とする
請求項１または請求項２に記載の磁石可動形リニアアク
チュエータ。3. The movable magnet type linear actuator according to claim 1, wherein the cylindrical bonded magnet forming the cylindrical permanent magnet structure is a rare earth bonded magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29379194A JP3371041B2 (en) | 1994-11-02 | 1994-11-02 | Magnet movable linear actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29379194A JP3371041B2 (en) | 1994-11-02 | 1994-11-02 | Magnet movable linear actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08130862A JPH08130862A (en) | 1996-05-21 |
| JP3371041B2 true JP3371041B2 (en) | 2003-01-27 |
Family
ID=17799216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29379194A Expired - Fee Related JP3371041B2 (en) | 1994-11-02 | 1994-11-02 | Magnet movable linear actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371041B2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3339626B2 (en) * | 1998-10-15 | 2002-10-28 | 愛知製鋼株式会社 | Vibrator for linear motor |
| JP2002064967A (en) * | 2000-08-17 | 2002-02-28 | Mikuni Adec Corp | Electromagnetic linear actuator |
| JP4895442B2 (en) * | 2001-06-29 | 2012-03-14 | スミダ電機株式会社 | Linear vibration motor |
| JP2004064852A (en) * | 2002-07-26 | 2004-02-26 | Matsushita Refrig Co Ltd | Linear motor and linear motor compressor |
| JP4022140B2 (en) * | 2002-12-25 | 2007-12-12 | アイシン精機株式会社 | Linear actuator |
| JP4725910B2 (en) * | 2004-09-07 | 2011-07-13 | 日本パルスモーター株式会社 | Linear actuator |
| DE102005049620A1 (en) * | 2005-10-16 | 2007-05-03 | Günter Biechele | Oscillating drive for use in alternating current field, has permanent magnetic core with permanent magnets, where effective pole surface of movable core has same permanent magnet polarity in direction of respective active poles of magnets |
| JP4636198B2 (en) * | 2008-12-08 | 2011-02-23 | 日亜化学工業株式会社 | Cylindrical bonded magnet, manufacturing method thereof, and rod-shaped magnet body |
| AT510941B1 (en) * | 2011-09-05 | 2012-07-15 | Seh Ltd | MAGNETIC DEVICE |
| CN105305762B (en) * | 2015-11-17 | 2017-03-29 | 上海泉源机电有限公司 | A kind of magnetic balance linear vibration motor and its method for oscillating |
| CN110439961B (en) * | 2019-07-19 | 2024-06-21 | 中国船舶重工集团公司第七一九研究所 | Reluctance type electromagnetic active and passive integrated composite vibration isolator |
| WO2021200831A1 (en) * | 2020-03-30 | 2021-10-07 | 株式会社デンソー | Manufacturing device for rotor, manufacturing method for rotor, and rotor |
| CN117656735A (en) * | 2023-03-31 | 2024-03-08 | 比亚迪股份有限公司 | Electromagnetic suspension and vehicle |
-
1994
- 1994-11-02 JP JP29379194A patent/JP3371041B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08130862A (en) | 1996-05-21 |
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