JPS61165043A - Magnetic vibration absorbing device - Google Patents
Magnetic vibration absorbing deviceInfo
- Publication number
- JPS61165043A JPS61165043A JP488585A JP488585A JPS61165043A JP S61165043 A JPS61165043 A JP S61165043A JP 488585 A JP488585 A JP 488585A JP 488585 A JP488585 A JP 488585A JP S61165043 A JPS61165043 A JP S61165043A
- Authority
- JP
- Japan
- Prior art keywords
- movable member
- support member
- magnetic
- support
- restoring force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
-
- 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
- F16F15/023—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 fluid means
- F16F15/0232—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 fluid means with at least one gas spring
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は磁力防振装置に関するものである。[Detailed description of the invention] Industrial applications This invention relates to a magnetic vibration isolator.
従来の技術
従来支持体に対して可動部材が変位すると可動部材に例
えばばねによシ復元力を与える防振装置が広く用いられ
ている。BACKGROUND OF THE INVENTION Vibration isolators have been widely used which apply a restoring force to a movable member using, for example, a spring when the movable member is displaced relative to a support.
発明が解決しようとする問題点
従来の防振装置では外部から伝達してくる振動数で２乃
至３Ｈｚ以上の振動数に対してしか防振できなく可動部
材の振幅で通常数百ミクロン以上程度にしか防振できな
かった。しかしながら、ｌＨｚＨｚ程度部から伝達する
振動数に対しても防振して振幅で例えば数ミクロン等少
くとも数十ミクロン以下となるようにする要望がある。Problems to be Solved by the Invention Conventional vibration isolators can only isolate vibrations transmitted from the outside at frequencies of 2 to 3 Hz or more, and the amplitude of the movable member is usually on the order of several hundred microns or more. I was only able to prevent vibrations. However, there is a demand for vibration isolation against frequencies transmitted from around 1 Hz, so that the amplitude is at least several tens of microns or less, for example, several microns.
この発明はこのような点を解決して外部から伝達する振
動数がＩ Ｈｚ程度でも十分防振できて振幅も数十ミク
ロン以下の非常に小さい値になる磁力防振装置を提供す
るものである。The present invention solves these problems and provides a magnetic vibration isolator that can sufficiently isolate vibrations even when the frequency transmitted from the outside is about I Hz, and the amplitude can be extremely small, less than several tens of microns. .
問題点を解決するための手段
この発明は支持体に対して所定方向に変位可能にした可
動部材と、この可動部材が所定方向へ変位すると変位が
大きいほど大きい復元力を与える復元力手段とを有する
ものにおいて、前記支持体側と可動部材にそれぞれ配置
する部分を有し近接するにしたがって大きくなるように
相互間に復元力と反対方向の磁力を及ぼすようにした磁
力手段を包含することを特徴とする磁力防振装置を提供
するものである。Means for Solving the Problems This invention provides a movable member that can be displaced in a predetermined direction with respect to a support, and restoring force means that provides a larger restoring force as the displacement increases when the movable member is displaced in a predetermined direction. The device is characterized in that it includes magnetic force means having portions disposed on the support side and the movable member, respectively, and exerting a magnetic force in a direction opposite to the restoring force between the movable member so as to increase as the movable member approaches the support body side. The present invention provides a magnetic vibration isolator.
実施例
以下図面を参照しながらこの発明の実施例について説明
する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１乃至５図に示すこの発明の一実施例において、１０
は軟鋼等の強磁性体よりなる支持体、１２はこの支持体
に復元力手段となる４個の空気バネ１３を介して支持さ
れる軟鋼等の強磁性体よりなる可動部材である。空気バ
ネ１３内へは供給口１５から配管１６及びレベリングパ
ルプ１７をえようとするとレベリングパルプ１７が動作
してパイプ１８から排気して所定高さに維持されるよう
になっている。２０はレベリングパルプの動作点を微調
整する調節ネジである。レペリングノ（ルブ］７は２個
の空気バネ１３に対してはそれぞれに設けてあシ、かつ
他の２個の空気バネ１３に対しては共通に１個設けてあ
って可動部材１２を３点で水平に維持するようになって
いる。In one embodiment of the invention shown in FIGS. 1 to 5, 10
12 is a support made of a ferromagnetic material such as mild steel, and 12 is a movable member made of a ferromagnetic material such as mild steel that is supported by the support via four air springs 13 serving as restoring force means. When an attempt is made to feed the pipe 16 and leveling pulp 17 into the air spring 13 through the supply port 15, the leveling pulp 17 operates and is evacuated from the pipe 18 to maintain a predetermined height. 20 is an adjustment screw for finely adjusting the operating point of the leveling pulp. A repel ring 7 is provided for each of the two air springs 13, and one is provided in common for the other two air springs 13, so that the movable member 12 can be moved at three points. to keep it horizontal.
２５は永久磁石又は電磁石よシなる磁石で図示のような
極性になっている。２６は磁石２５を支持体１０に対し
て固定すると共に磁路を形成する軟鋼等の強磁性体よシ
なる部材である。したがって、可動部材１２は磁石２５
よシ吸引する磁力を受けることになる。２７は隣接する
磁石２５の間にそれらの磁極よシやや突出させるように
設けた例えば銅２合成樹脂等の強磁性体でない材料よシ
なる係止部材で、可動部材１２が所定以上磁石２５に接
近して大きい力で吸引されるのを防止するようになって
いる。第４図及び第５図はこの場合形成される一部の磁
束を示すものである。磁石２５及び可動部材１２を含む
この磁束の通過する部分は磁力手段を構成するものであ
る。A magnet 25, such as a permanent magnet or an electromagnet, has a polarity as shown in the figure. 26 is a member made of ferromagnetic material such as mild steel that fixes the magnet 25 to the support 10 and forms a magnetic path. Therefore, the movable member 12 has a magnet 25
It will be subject to a strong magnetic force. Reference numeral 27 denotes a locking member made of a non-ferromagnetic material such as copper 2 synthetic resin, which is provided between adjacent magnets 25 so that their magnetic poles slightly protrude. It is designed to prevent you from getting close and being sucked in with great force. FIGS. 4 and 5 show some of the magnetic flux generated in this case. The portion through which this magnetic flux passes, including the magnet 25 and the movable member 12, constitutes magnetic force means.
第６図を参照してこの発明の詳細な説明すると次のよう
になる。すなわち、この図において、Ｘは可動部材１２
のレベリングパルプ１７から排気することになる基準位
置Ｘ−から可動部材１２が下方へ移動した位置を正の値
として示す。この位置Ｘに対して空気バネ１３が空気の
給排気を行わない状態で可動部材１２に及ぼす合計の弾
性力がＦｓで表わしてあり、かつ磁石２５が可動部材１
２に及ぼす磁力がＦｍで表わしてあり負の値となる。The present invention will be described in detail as follows with reference to FIG. That is, in this figure, X is the movable member 12
The position where the movable member 12 moves downward from the reference position X-, where the leveling pulp 17 is to be exhausted, is shown as a positive value. The total elastic force exerted on the movable member 12 with respect to this position
The magnetic force exerted on 2 is expressed as Fm and is a negative value.
Ｆは弾性力Ｆｓと磁力Ｆｍの和の力を示す。Ｘｌはこの
場合可動部材１２が振動する場合係止部材２７に停止さ
せられる位置を示すものであり、かつＸｚは可動部材１
２が磁石２５の磁極に接触する状態を示すものである。F represents the sum of the elastic force Fs and the magnetic force Fm. In this case, Xl indicates the position where the movable member 12 is stopped by the locking member 27 when it vibrates, and Xz indicates the position where the movable member 12 is stopped by the locking member 27 when vibrating.
2 shows a state in which the number 2 is in contact with the magnetic pole of the magnet 25.
ここで次のような式が成立する。Here, the following formula holds true.
Ｆ ＝ Ｆｓ ＋ Ｆｍ −−−−・（１）Ｋは可
動部材１２が微小振動を行う場合のバネ定数であシ、可
動部材の位置によシ変化するものである。式（８）の右
辺の第１項は正の値であり、かつ第２項は負の値である
。Ｘの値が第６図にＸ＋で示す位置以上に大きくなると
バネ定数には負の値になシ弾性振動ができなくなるもの
である。したがって、少くともｘｌの値を越えないよう
に係上部材２７が設けである。可動部材１２の質量をＭ
とするとその固有振動数ｆ、は式（４）で表わされ、バ
ネ定数Ｋが小さい範囲では非常に低い固有振動数となる
ものである。外部から振動数ｆの上下方向の振動が支持
体１０に伝達した場合可動部材１２に伝達する振幅の割
合である振動伝達率Ｔは（５）式で表わされ、固有振動
数ｆ、が小さいほど小さい値になるものである。可動部
材１２の設定位置ｘｏを調節ネジ２０によシ調整するこ
とによシバネ定数Ｋを小さくして固有振動数ｆ、が十分
小さくなる。そのためＩ Ｈｚ程度の振動に対しても防
振することができるようになるものである。F = Fs + Fm (1) K is a spring constant when the movable member 12 makes minute vibrations, and it changes depending on the position of the movable member. The first term on the right side of equation (8) is a positive value, and the second term is a negative value. If the value of X becomes larger than the position indicated by X+ in FIG. 6, the spring constant will have a negative value and elastic vibration will not be possible. Therefore, the engaging member 27 is provided so that at least the value of xl is not exceeded. The mass of the movable member 12 is M
Then, the natural frequency f is expressed by equation (4), and in a range where the spring constant K is small, the natural frequency is very low. When vibrations in the vertical direction with a frequency f are transmitted from the outside to the support 10, the vibration transmission rate T, which is the proportion of the amplitude transmitted to the movable member 12, is expressed by equation (5), where the natural frequency f is small. The smaller the value becomes. By adjusting the set position xo of the movable member 12 using the adjustment screw 20, the spring constant K is made small and the natural frequency f becomes sufficiently small. Therefore, it is possible to prevent vibrations even from vibrations of about I Hz.
この発明において、磁力として吸引力を使用することな
く、第７図に示すように互いに接近するにしたがって大
きい反発力を与える磁石２５を用いて可動部材１２に下
方へ向かう力を与えるようにしてもよい。又、この発明
は空気バネ以外に鋼製スプリングやゴムバネを用いて防
振を行う装置にも適用可能であシ、さらに可動部材１２
は上下方向以外に水平方向等どんな方向に弾性支持、さ
れていても適用できるものである。第８図は磁石３２．
３３の反発力を利用して可動部材１２を支持する場合に
この発明を適用した状態を示し、３５は強磁性体よりな
る部材、３６は強磁性体でない材料よりなる部材を示す
。In this invention, instead of using attractive force as the magnetic force, as shown in FIG. 7, the downward force may be applied to the movable member 12 using magnets 25 that provide a larger repulsive force as they approach each other. good. Further, the present invention can be applied to a device that performs vibration isolation using a steel spring or a rubber spring in addition to an air spring.
can be applied even if it is elastically supported in any direction other than vertically, such as horizontally. FIG. 8 shows magnet 32.
A state in which the present invention is applied when supporting the movable member 12 using the repulsive force of 33 is shown, 35 is a member made of a ferromagnetic material, and 36 is a member made of a material other than ferromagnetic material.
発明の効果
この発明は前述したように磁石を用いて磁力によシ防振
装置の固有振動数を著しく低くできて低い振動数の振動
が伝達してきても可動部材１２へ伝達するのを著しく減
少できるようになるという効果を有している。Effects of the Invention As described above, the present invention uses magnets to significantly lower the natural frequency of the vibration isolator by magnetic force, and even if low frequency vibrations are transmitted, the transmission to the movable member 12 is significantly reduced. It has the effect of making it possible.
第１図はこの発明の一実施例を示す要部の縦断面図、第
２図はその正面図、第３図はその可動部材を除去して示
す平面図、第４図と第５図はそれぞれ第３図のＡ−Ａ線
とＢ−Ｂ線方向に断面とした場合の磁束を示す説明図、
第６図は特性線図、第７図と第８図はそれぞれ異なった
この発明の他の実施例を示す正面図である。
１０は支持体、１２は可動部材、１３は復元力手段とな
る空気バネ、２５は磁力手段を構成するための磁石、２
６は係止部材。
代理人 弁理士 勝 部 明 長
く−１−
第 ５ ８
ＸＧｇ 図
ｓ７図
第 ８ 図
手続補正書
昭和６０年２月１５日Fig. 1 is a vertical sectional view of the main part showing one embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a plan view showing the movable member removed, and Figs. 4 and 5 are An explanatory diagram showing the magnetic flux when the cross section is taken in the direction of the A-A line and the B-B line in FIG. 3, respectively,
FIG. 6 is a characteristic diagram, and FIGS. 7 and 8 are front views showing different embodiments of the present invention. 10 is a support body, 12 is a movable member, 13 is an air spring serving as restoring force means, 25 is a magnet for configuring magnetic force means, 2
6 is a locking member. Agent Patent Attorney Akira Katsube Naga-1- No. 5 8
Claims (1)
この可動部材が所定方向へ変位すると変位が大きいほど
大きい復元力を与える復元力手段とを有するものにおい
て、前記支持体側と可動部材にそれぞれ配置する部分を
有し近接するにしたがつて大きくなるように相互間に復
元力と反対方向の磁力を及ぼすようにした磁力手段を包
含することを特徴とする磁力防振装置。a movable member that can be displaced in a predetermined direction with respect to the support;
When the movable member is displaced in a predetermined direction, the restoring force means provides a larger restoring force as the displacement becomes larger, and the restoring force means has portions disposed on the support side and the movable member respectively, and the portions increase as the movable member approaches the movable member. 1. A magnetic vibration isolator comprising magnetic force means configured to exert a magnetic force in a direction opposite to the restoring force between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP488585A JPS61165043A (en) | 1985-01-17 | 1985-01-17 | Magnetic vibration absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP488585A JPS61165043A (en) | 1985-01-17 | 1985-01-17 | Magnetic vibration absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61165043A true JPS61165043A (en) | 1986-07-25 |
Family
ID=11596131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP488585A Pending JPS61165043A (en) | 1985-01-17 | 1985-01-17 | Magnetic vibration absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61165043A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217893A (en) * | 2022-07-15 | 2022-10-21 | 哈尔滨工业大学 | Active pneumatic magnetic vibration isolation and active damping transfer device for precision equipment |
-
1985
- 1985-01-17 JP JP488585A patent/JPS61165043A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217893A (en) * | 2022-07-15 | 2022-10-21 | 哈尔滨工业大学 | Active pneumatic magnetic vibration isolation and active damping transfer device for precision equipment |
| CN115217893B (en) * | 2022-07-15 | 2023-09-08 | 哈尔滨工业大学 | Active air-magnetic vibration isolation and active damping transfer device for precision equipment |
| CN115217893B8 (en) * | 2022-07-15 | 2023-10-10 | 哈尔滨工业大学 | Active air-magnetic vibration isolation and active damping transfer device for precision equipment |
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