JPS6131603B2 - - Google Patents
Info
- Publication number
- JPS6131603B2 JPS6131603B2 JP5440681A JP5440681A JPS6131603B2 JP S6131603 B2 JPS6131603 B2 JP S6131603B2 JP 5440681 A JP5440681 A JP 5440681A JP 5440681 A JP5440681 A JP 5440681A JP S6131603 B2 JPS6131603 B2 JP S6131603B2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- magnets
- yoke
- magnetic
- vibration
- 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
Links
- 239000000696 magnetic material Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 3
- 229920001875 Ebonite Polymers 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0236—Magnetic suspension or levitation
Description
【発明の詳細な説明】
本発明は磁極間の反撥力を利用した防振装置の
改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vibration isolating device that utilizes repulsive force between magnetic poles.
この種の防振装置は、同極を対向配置した磁石
の間に作用する反撥力によつて、防振すべき機器
を浮遊状態で支持するものであるので、大なるコ
ンプライアンスを有し、良好なる防振効果を有す
る反面、外部からの衝撃により生じる自由振動が
いつまでも減衰しない欠点がある。 This type of vibration isolator supports the equipment to be vibration-isolated in a floating state by the repulsive force acting between magnets with the same poles facing each other, so it has great compliance and good performance. Although it has a vibration-proofing effect, it has the disadvantage that free vibrations caused by external shocks are not attenuated forever.
本発明は、反撥力の増大を図りつつ、前記欠点
を解消することを目的とするものであつて、図は
その実施例を示すものである。１はリング状の下
部磁石であつて、図示のようにその軸方向に着磁
されている。下部磁石１は磁性体で構成された皿
形の下部ヨーク３の底部３ａ上に密着固定されて
おり、その外周面はリング状の非磁性体のスペー
サ２を介して環状部３ｂに対向している。４は下
部磁石１の中央孔内に固定された弾性体であつ
て、その中心部にスリーブ５が固定されている。
下部ヨーク３の下半部は、硬質ゴム性の下部ケー
ス６に挿入され、クツシヨン８、金属板７を介し
て下部ケース６の底面上に載置されている。下部
ケース６の側壁は下部ヨーク３を摺動可能に包囲
し、それに設けた凹部９はクツシヨン８の変形を
許容する。１０は下部ケース６の中央開口を塞ぐ
キヤツプであつて、金属板７に螺着されている。
キヤツプ１０は必要に応じて取付ねじと交換さ
れ、それによつて下部ケース６を床面等に固定す
る。 The present invention aims to eliminate the above-mentioned drawbacks while increasing the repulsive force, and the drawings show an embodiment thereof. Reference numeral 1 denotes a ring-shaped lower magnet, which is magnetized in its axial direction as shown in the figure. The lower magnet 1 is tightly fixed on the bottom part 3a of a dish-shaped lower yoke 3 made of a magnetic material, and its outer peripheral surface faces an annular part 3b with a ring-shaped spacer 2 made of a non-magnetic material interposed therebetween. There is. 4 is an elastic body fixed in the center hole of the lower magnet 1, and a sleeve 5 is fixed at the center thereof.
The lower half of the lower yoke 3 is inserted into a lower case 6 made of hard rubber, and placed on the bottom surface of the lower case 6 via a cushion 8 and a metal plate 7. The side wall of the lower case 6 slidably surrounds the lower yoke 3, and a recess 9 provided therein allows the cushion 8 to deform. A cap 10 closes the central opening of the lower case 6 and is screwed onto the metal plate 7.
The cap 10 is replaced with a mounting screw as necessary, thereby fixing the lower case 6 to the floor or the like.
１１はリング状の上部磁石であつて、図示のよ
うにその軸方向に着磁されており、皿形の磁性体
で構成された上部ヨーク１３内に非磁性体のスペ
ーサに介して固定されその中央部に弾性体１４を
介してスリーブ１５を保持している。上部ヨーク
１３は硬質ゴム製の上部ケース１６に密嵌され、
その中央口に螺合する非磁性体のキヤツプ２０に
よつて上部ケース１６に固定される。 Reference numeral 11 denotes a ring-shaped upper magnet, which is magnetized in the axial direction as shown in the figure, and is fixed in an upper yoke 13 made of a disk-shaped magnetic material via a non-magnetic spacer. A sleeve 15 is held in the center via an elastic body 14. The upper yoke 13 is tightly fitted into the upper case 16 made of hard rubber.
It is fixed to the upper case 16 by a non-magnetic cap 20 that is screwed into the central opening.
上部ケース１６は上部磁石１１の磁極面を下部
磁石１の磁極面に対向するようにして、下部ケー
ス６の上方に配置される。両磁石１，１１は互に
同極が対向するように配置されている。 The upper case 16 is arranged above the lower case 6 with the magnetic pole surface of the upper magnet 11 facing the magnetic pole surface of the lower magnet 1. Both magnets 1 and 11 are arranged so that the same poles face each other.
２１は磁性体のシヤフトであつて、スリーブ
５，１５を摺動自在に貫通している。シヤフト２
１の上端部には鍔片２２が固定されており、それ
がキヤツプ２０に形成した円筒部２３内に嵌合さ
れている。 Reference numeral 21 denotes a shaft made of a magnetic material, which passes through the sleeves 5 and 15 in a slidable manner. Shaft 2
A collar piece 22 is fixed to the upper end of the cap 1, and is fitted into a cylindrical portion 23 formed on the cap 20.
次に前記装置の作用を説明する。 Next, the operation of the device will be explained.
〓〓〓
下部ケース６を床面に載置し、上部ケース１６
上に防振を必要とする機器を載置すると、上部ケ
ース１６は両磁石１，１１間に作用する反撥力に
よつて図示のように浮遊状態に支持されるので、
その上に載置された機器は床面から浮遊した状態
となり、床面からの垂直振動の伝達が阻止され
る。上下両磁石１１，１は水平方向のずれに対す
る復元力を発生しないので、そのままでは両磁石
１１，１の対向状態が維持できない。この状態を
維持するために設けたのがシヤフト２１である。
シヤフト２１は上下両磁石１１，１が同軸位置に
あるように、それらの水平位置を規制する。〓〓〓
Place the lower case 6 on the floor and lower the upper case 16.
When a device that requires vibration isolation is placed on top, the upper case 16 is supported in a floating state by the repulsive force acting between both magnets 1 and 11, as shown in the figure.
The equipment placed on top of it is suspended from the floor surface, and vertical vibration transmission from the floor surface is prevented. Since both the upper and lower magnets 11,1 do not generate a restoring force against horizontal displacement, the opposed state of the two magnets 11,1 cannot be maintained as is. The shaft 21 is provided to maintain this state.
The shaft 21 regulates the horizontal position of both the upper and lower magnets 11, 1 so that they are coaxial.
両ヨーク３，１３は、両磁石１，１１の磁束が
外部に漏洩するのを防止すると共に反撥力増大の
役目を果す。すなわち両ヨーク３，１３の環状部
３ｂ，１３ｂの端面はそれぞれＳ極となり、それ
らの間にも互に反撥力が生じるので、これが両磁
石１，１１のＮ極同志の反撥力に加わる。 Both yokes 3 and 13 serve to prevent the magnetic flux of both magnets 1 and 11 from leaking to the outside and to increase repulsive force. In other words, the end faces of the annular portions 3b and 13b of both yokes 3 and 13 serve as south poles, and mutual repulsive force is generated between them, so that this is added to the repulsive force of the north poles of both magnets 1 and 11.
シヤフト２１は、前述のように上下両磁石１
１，１の水平方向の対向状態を維持するためもの
であるが、その他に自由振動を制限する役目を果
す。上部ケース１６に下向きの衝撃が加わると上
部磁石１１が下部磁石１に接近するため、それら
の間に作用する反撥力が増大し、上部ケース１６
を押返えす。この上向きの運動は慣性により行き
過ぎとなり、再び下向きの運動を誘発させ、自由
振動が発生するのであるが、その際シヤフト２１
と両ケース６，１６間に相対運動が生じる。すな
わち、上部ケース１６の下降によりシヤフト２１
の上端は上部ヨーク１３の底部１３ａからの突出
量を増大させ、下端は下部ヨーク３の底部３ａか
らの突出量を増大させる。また、上部ケース１６
の上昇時には逆に突出量が減少する。 The shaft 21 has both upper and lower magnets 1 as described above.
This is to maintain the horizontally opposing state of 1, 1, but it also serves to limit free vibration. When a downward impact is applied to the upper case 16, the upper magnet 11 approaches the lower magnet 1, so the repulsive force acting between them increases, and the upper case 16
Push back. This upward movement goes too far due to inertia, inducing downward movement again and free vibration occurs, but at this time the shaft 21
A relative movement occurs between the two cases 6 and 16. That is, the lowering of the upper case 16 causes the shaft 21 to
The upper end increases the amount of protrusion of the upper yoke 13 from the bottom 13a, and the lower end increases the amount of protrusion of the lower yoke 3 from the bottom 3a. In addition, the upper case 16
On the contrary, when the amount of protrusion increases, the amount of protrusion decreases.
ところで、シヤフト２１は磁性体で構成されて
いるので、両磁石１，１１のＮ極から中央部に向
う磁束φ２、φ12の磁路を形成し、それにより図
示のような磁極が誘発される。その結果、下部ヨ
ーク３の底部３ａとシヤフト２１との間、及び上
部ヨーク１３の底部１３ａとシヤフト２１との間
にそれぞれ吸引力が発生する。この吸引力は図示
の安定状態よりもシヤフト２１の前記突出量が増
大する際には、その増大を抑制する方向に作用
し、減少する際にはその減少を抑制する方向に作
用するので、上部ケース１６の自由振動が抑制さ
れる。 By the way, since the shaft 21 is made of a magnetic material, it forms a magnetic path of magnetic fluxes φ 2 and φ 12 from the N poles of both magnets 1 and 11 toward the center, thereby inducing magnetic poles as shown in the figure. Ru. As a result, suction force is generated between the bottom 3a of the lower yoke 3 and the shaft 21 and between the bottom 13a of the upper yoke 13 and the shaft 21, respectively. When the amount of protrusion of the shaft 21 increases compared to the stable state shown in the figure, this suction force acts in a direction to suppress the increase, and when it decreases, it acts in a direction to suppress the decrease. Free vibration of the case 16 is suppressed.
シヤフト２１は鍔片２２を有しており、それが
キヤツプ２０の円筒部２３内にあるため、エアダ
ンパーの作用をする。したがつてシヤフト２１の
上部ケース１６に対する相対運動はそれによつて
も抑制され、上部ケース１６は自由振動を抑制さ
れる。なお、エアダンパーはシヤフト２１の下端
部とキヤツプ１０とで構成してもよく、上下両位
置に設けてもよい。 The shaft 21 has a collar piece 22, which is located within the cylindrical portion 23 of the cap 20, so that it acts as an air damper. Therefore, the relative movement of the shaft 21 with respect to the upper case 16 is also suppressed thereby, and the free vibration of the upper case 16 is suppressed. Note that the air damper may be constructed from the lower end of the shaft 21 and the cap 10, or may be provided at both the upper and lower positions.
本発明は以上のように、上下両磁石の対向状態
を同軸状に規制するためのシヤフトを磁性体で構
成し、それを磁路の一部としたので、それと皿形
のヨークとの対向部にそれぞれ異極が誘起され、
それらの間に生じる吸引力が皿形ヨークからのシ
ヤフトの突出量が一定の保持されるように作用す
る。したがつて、この吸引力により両磁石間に生
じる自由振動を抑制することができ、皿形ヨーク
は磁気遮蔽、反撥力増大及び自由振動抑制の３作
用をする。 As described above, in the present invention, the shaft for regulating the facing state of both the upper and lower magnets in a coaxial manner is constructed of a magnetic material, and this is made a part of the magnetic path, so that the opposing portion between the shaft and the dish-shaped yoke is made of a magnetic material. different polarities are induced in each,
The suction force generated between them acts to maintain a constant amount of protrusion of the shaft from the dish-shaped yoke. Therefore, this attractive force can suppress free vibrations occurring between both magnets, and the dish-shaped yoke performs three functions: magnetic shielding, increasing repulsive force, and suppressing free vibrations.
図は本発明の一実施例正断面図である。
１……下部磁石、３……下部ヨーク、１１……
上部磁石、１３……上部ヨーク、２１……シヤフ
ト、２２……鍔片、２３……円筒部。
〓〓〓〓
The figure is a front sectional view of an embodiment of the present invention. 1...Lower magnet, 3...Lower yoke, 11...
Upper magnet, 13... Upper yoke, 21... Shaft, 22... Flange piece, 23... Cylindrical portion. 〓〓〓〓
Claims (1)
同極を対向させて上下に配置し、前記両磁石を底
部中央に開口を有する皿形のヨークに、それぞれ
固定した防振装置に於て、両磁石の対向状態を同
軸状に規制するためのシヤフトを磁性体で構成
し、該シヤフトの両端部を前記両ヨークの中央開
口を貫通突出させて磁路の一部としたことを特徴
とする防振装置。1 A pair of ring-shaped magnets magnetized in the axial direction are arranged one above the other with the same polarity facing each other, and both magnets are fixed to a dish-shaped yoke having an opening at the center of the bottom in a vibration isolating device. A shaft for regulating the facing state of both magnets in a coaxial manner is made of a magnetic material, and both ends of the shaft protrude through the central openings of the two yokes to form part of the magnetic path. Anti-vibration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5440681A JPS57169211A (en) | 1981-04-13 | 1981-04-13 | Vibration suppressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5440681A JPS57169211A (en) | 1981-04-13 | 1981-04-13 | Vibration suppressing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57169211A JPS57169211A (en) | 1982-10-18 |
| JPS6131603B2 true JPS6131603B2 (en) | 1986-07-21 |
Family
ID=12969813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5440681A Granted JPS57169211A (en) | 1981-04-13 | 1981-04-13 | Vibration suppressing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57169211A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9509204B2 (en) * | 2013-12-12 | 2016-11-29 | The Boeing Company | Motion-damping systems between base structure and an attached component and methods including the same |
-
1981
- 1981-04-13 JP JP5440681A patent/JPS57169211A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57169211A (en) | 1982-10-18 |
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