JP2001050332A - Spring constant variable viscous fluid sealed damper - Google Patents
Spring constant variable viscous fluid sealed damperInfo
- Publication number
- JP2001050332A JP2001050332A JP22602699A JP22602699A JP2001050332A JP 2001050332 A JP2001050332 A JP 2001050332A JP 22602699 A JP22602699 A JP 22602699A JP 22602699 A JP22602699 A JP 22602699A JP 2001050332 A JP2001050332 A JP 2001050332A
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- viscous fluid
- spring constant
- flexible
- thin
- 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.)
- Granted
Links
Landscapes
- Combined Devices Of Dampers And Springs (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光ディスク等を用
いる音響機器や情報機器等において外部からの振動を減
衰する防振装置であるバネ定数可変型粘性流体封入式ダ
ンパーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscous fluid-filled damper with a variable spring constant, which is a vibration damping device for attenuating external vibrations in audio equipment and information equipment using an optical disk or the like.
【０００２】[0002]
【従来の技術】粘性流体封入式ダンパーは、図６に例示
されるように、ゴム状弾性体からなる可撓部９を有する
容器１の内部に充填された粘性流体２中をシャフト４が
挿入された攪拌部３が移動することで生じる粘性流動抵
抗により、外部から被支持体１０に伝わる振動を減衰し
ている。外部からの振動には振動数や加速度の小さいも
のから大きいものまで様々であり、衝撃作用も働くこと
がある。このような様々な振動に対して、被支持体の重
量やバランスも考慮して、粘性流体封入式ダンパーの粘
性流体の粘度や、可撓部のゴム状弾性体の硬度を変える
ことで防振効果を調整している。2. Description of the Related Art In a viscous fluid-filled damper, as shown in FIG. 6, a shaft 4 is inserted into a viscous fluid 2 filled in a container 1 having a flexible portion 9 made of a rubber-like elastic body. Vibration transmitted from the outside to the supported member 10 is attenuated by viscous flow resistance generated by the movement of the agitated part 3. There are various types of external vibrations, from low to high vibration frequencies and accelerations, and may also have an impact effect. In response to such various vibrations, the viscosity of the viscous fluid-filled damper and the hardness of the rubber-like elastic body of the flexible part are changed by taking into account the weight and balance of the supported body. Adjusting the effect.
【０００３】[0003]
【発明が解決しようとする課題】高粘度の粘性流体を封
入したダンパーは、見かけ上の動的バネ定数が高く、高
い共振周波数と高減衰力により振幅を小さくできる。し
かし、１００Ｈｚ以上の高い周波数の振動に対しては共
振周波数および減衰力が高いことにより振動伝達率を下
げる効果が低く、つまり防振効果が低下してしまう。A damper filled with a high-viscosity viscous fluid has a high apparent dynamic spring constant, and its amplitude can be reduced by a high resonance frequency and a high damping force. However, for a vibration having a high frequency of 100 Hz or more, the resonance frequency and the damping force are high, so that the effect of lowering the vibration transmissibility is low, that is, the vibration damping effect is reduced.
【０００４】逆に、低粘度の粘性流体を封入したダンパ
ーは、被支持体の共振周波数付近（特に１０〜２０Ｈｚ
の低い周波数付近）では、被支持体の共振倍率が高くな
る為、被支持体の振幅が大きくなり、攪拌部と容器およ
び蓋との衝突による衝撃、または被支持体とシャーシ間
の衝突による衝撃により、この周波数付近ではディスク
の音飛び、誤動作等が発生し易くなる。On the other hand, a damper filled with a low-viscosity viscous fluid is provided near a resonance frequency of a supported member (particularly, 10 to 20 Hz).
(Low frequency), the resonance magnification of the supported member increases, the amplitude of the supported member increases, and the impact caused by the collision between the stirring unit and the container or the lid, or the impact caused by the collision between the supported member and the chassis. Therefore, in the vicinity of this frequency, sound skipping of the disk, malfunction, and the like are likely to occur.
【０００５】したがって、低周波数域から高周波数域ま
で広い周波数域で大きい減衰効果を持ち、且つ被支持体
の共振周波数での共振倍率を抑える粘性流体封入式ダン
パーを得ることが困難であった。Therefore, it has been difficult to obtain a viscous fluid-filled damper which has a large damping effect in a wide frequency range from a low frequency range to a high frequency range and suppresses the resonance magnification at the resonance frequency of the supported member.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記課題を解
決するものであって、ダンパーの可撓部の肉厚に変化を
つけることで、バネ定数を振幅に依存させる構造にした
バネ定数可変型粘性流体封入式ダンパーを提供するもの
である。比較的振幅の小さいときは薄肉部が主に可動す
るため、薄肉部のバネ定数のみがダンパー全体のバネ定
数に影響を及ぼす。比較的振幅の大きいときは厚肉部も
可動するため、厚肉部のバネ定数がダンパー全体のバネ
定数に影響を及ぼす。したがって、振幅の小さい高周波
数域ではバネ定数が小さいため振動伝達率が低く抑えら
れ、振幅の大きい低周波数域ではバネ定数が大きくなり
共振倍率が低く抑えられる。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a structure in which the thickness of a flexible portion of a damper is changed to make the spring constant dependent on the amplitude. A variable viscous fluid-filled damper is provided. When the amplitude is relatively small, the thin portion mainly moves, so only the spring constant of the thin portion affects the spring constant of the entire damper. When the amplitude is relatively large, the thick portion also moves, so the spring constant of the thick portion affects the spring constant of the entire damper. Therefore, in a high frequency range where the amplitude is small, the spring constant is small, so that the vibration transmissibility is suppressed low. In a low frequency range where the amplitude is large, the spring constant becomes large and the resonance magnification is suppressed low.
【０００７】すなわち、攪拌部と、筒状部と、該両部を
繋ぐゴム状弾性体からなる可撓部とにより構成される容
器と、蓋とにより粘性流体が封入され、外部からの振動
に対し該攪拌部が該粘性流体中を移動することで生じる
粘性抵抗により振動減衰をおこなうダンパーにおいて、
可撓部の肉厚が、攪拌部周辺の肉厚と筒状部周辺の肉厚
が異なる肉厚で形成されているバネ定数可変型粘性流体
封入式ダンパーである。That is, a viscous fluid is sealed by a container constituted by a stirring part, a cylindrical part, and a flexible part made of a rubber-like elastic body connecting the two parts, and a lid, so that vibrations from the outside are prevented. On the other hand, in a damper that performs vibration damping due to viscous resistance generated by the stirring part moving in the viscous fluid,
This is a viscous fluid-filled damper with a variable spring constant in which the thickness of the flexible portion is different from the thickness around the agitating portion and the thickness around the cylindrical portion.
【０００８】さらに、可撓部の肉厚が、攪拌部から筒状
部に向けて厚肉にあるいは薄肉に、また連続してあるい
は段階的に変化するように形成されているバネ定数可変
型粘性流体封入式ダンパーである。さらに、可撓部の肉
厚が、筒状部に向けて境界を有して厚さが切り替わるよ
うに形成されているバネ定数可変型粘性流体封入式ダン
パーである。さらに、可撓部の薄肉部と厚肉部の肉厚の
比が、１.０：１.１から１.０：５.０であるバネ定数可
変型粘性流体封入式ダンパーである。Further, the spring constant variable type viscous member is formed such that the thickness of the flexible portion changes from the agitating portion to the cylindrical portion so as to be thicker or thinner and continuously or stepwise. It is a fluid-filled damper. Furthermore, a viscous fluid-filled damper with a variable spring constant is formed such that the thickness of the flexible portion is switched so as to have a boundary toward the cylindrical portion and change the thickness. Further, the viscous fluid-filled damper is a spring constant variable type in which the ratio of the thickness of the thin portion to the thick portion of the flexible portion is from 1.0: 1.1 to 1.0: 5.0.
【０００９】本発明の可撓部の薄肉部と厚肉部の肉厚の
比はダンパーの大きさやゴム状弾性体の強度等にも依存
するが、１.０：１.１から１.０：５.０の範囲が好まし
い。薄肉部の肉厚１.０に対して厚肉部の肉厚が１.１よ
りも小さいと厚さの変化がダンパーとしてのバネ定数の
変化に現れず、また５.０よりも大きいと薄肉部と厚肉
部の引張り応力の差が大きく現れてしまい、振幅が大き
くなっても薄肉部しか可動せずバネ定数の変化に現れな
い。より好ましい肉厚の比は１.０：１.５から１.０：
３.０である。The ratio of the thickness of the thin portion to the thick portion of the flexible portion of the present invention depends on the size of the damper, the strength of the rubber-like elastic body, etc., but is from 1.0: 1.1 to 1.0. : 5.0 is preferable. If the thickness of the thick portion is smaller than 1.1 with respect to the thin portion of 1.0, the change in thickness does not appear in the change of the spring constant as a damper, and if it is larger than 5.0, it is thin. A large difference in tensile stress between the thick part and the thick part appears, and even if the amplitude increases, only the thin part moves and does not appear in a change in the spring constant. A more preferred thickness ratio is from 1.0: 1.5 to 1.0:
3.0.
【００１０】本発明の可撓部は、攪拌部から外方に向か
って同心円周上の肉厚が等しく形成されており、薄肉部
は肉厚が薄いためバネ定数が小さく、また厚肉部は肉厚
が厚いためバネ定数が大きい。本発明の肉厚の構成は、
薄肉部と厚肉部の配置がどちらが内周側でもよく、また
その厚さの変化は、連続的にあるいは段階的に変わるも
のでも、または境界を有して厚さが切り替わるものでも
どちらでもかまわない。The flexible portion of the present invention is formed so as to have the same thickness on the concentric circumference outward from the agitating portion. The thin portion has a small thickness, so that the spring constant is small. The spring constant is large due to the large thickness. The thickness configuration of the present invention is:
Either the thin portion or the thick portion may be disposed on the inner peripheral side, and the thickness may be changed continuously or stepwise, or may be changed in thickness with a boundary. Absent.
【００１１】[0011]
【発明の実施の形態】以下に、図を示しながら本発明の
バネ定数可変型粘性流体封入式ダンパーの構成について
説明する。図１〜図５は、それぞれ本発明のバネ定数可
変型粘性流体封入式ダンパーの実施態様の断面図であ
る。本発明のバネ定数可変型粘性流体封入式ダンパー
は、容器１が、攪拌部３と、筒状部８と、該両部を繋ぐ
ゴム状弾性体からなる可撓部９とにより構成され、更に
可撓部９は、薄肉部６と厚肉部７とから構成されてい
る。粘性流体２を容器に充填して蓋５で密閉して本発明
のバネ定数可変型粘性流体封入式ダンパーを得る。被支
持体１０から突起したシャフト４が容器１の攪拌部３に
挿入され、外部振動が発生した時に可撓部９が変形して
攪拌部３が粘性流体２を攪拌動作をすることで粘性抵抗
を受け、被支持体に防振効果を与えている。蓋５の構造
は、図では単体構造であるが、複合構造でもかまわな
い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a variable spring constant type viscous fluid filled damper of the present invention will be described below with reference to the drawings. 1 to 5 are cross-sectional views of an embodiment of a variable spring constant type viscous fluid-filled damper of the present invention. In the viscous fluid-filled damper of the variable spring constant type according to the present invention, the container 1 is constituted by the stirring section 3, the cylindrical section 8, and the flexible section 9 made of a rubber-like elastic body connecting the both sections. The flexible portion 9 includes a thin portion 6 and a thick portion 7. The container is filled with the viscous fluid 2 and sealed with the lid 5 to obtain a viscous fluid-sealed damper of the present invention with a variable spring constant. The shaft 4 protruding from the supported body 10 is inserted into the stirring section 3 of the container 1, and when the external vibration occurs, the flexible section 9 is deformed and the stirring section 3 performs the stirring operation of the viscous fluid 2, thereby causing the viscous resistance. Thus, the vibration-proof effect is given to the supported body. The structure of the lid 5 is a single structure in the figure, but may be a composite structure.
【００１２】図１の実施態様は、可撓部９の内周、すな
わち攪拌部３の周辺に薄肉部６が形成され、そして薄肉
部６の外周に厚肉部７が形成されている。図２の実施態
様は、図１のものとは逆に、攪拌部３の周辺に厚肉部７
が形成され、更に厚肉部７の外周に薄肉部６が形成され
ている。図３の実施態様は、可撓部９の内周、すなわち
攪拌部３の周辺に薄肉部６が形成され、そして薄肉部ａ
の外周が筒状部８に向けて肉厚ｂ,ｃ,ｄが段階的に変化
して形成されている。肉厚はａ＜ｂ＜ｃ＜ｄの関係にな
っている。図４の実施態様では、攪拌部３の周辺の薄肉
部ａと境界Ａを有して厚さが切り替わり、その外周ｂ,
ｃ,ｄの肉厚変化が筒状部に向けて連続して厚くなるよ
うに変化している。さらに図５に示す実施態様では、可
撓部９の内周、すなわち攪拌部３の周辺に薄肉部６、そ
してその外周に境界Ａを有して厚さが切り替わり厚肉部
７が形成されている。この薄肉部６および厚肉部７の厚
さは変化せずに、それぞれ一定の厚さとなっている。In the embodiment shown in FIG. 1, a thin portion 6 is formed on the inner periphery of the flexible portion 9, that is, around the stirring portion 3, and a thick portion 7 is formed on the outer periphery of the thin portion 6. The embodiment of FIG. 2 is different from that of FIG.
Are formed, and the thin portion 6 is formed on the outer periphery of the thick portion 7. In the embodiment of FIG. 3, the thin portion 6 is formed on the inner periphery of the flexible portion 9, that is, around the stirring portion 3, and the thin portion a
Is formed such that the thicknesses b, c, and d change stepwise toward the cylindrical portion 8. The wall thickness has a relationship of a <b <c <d. In the embodiment of FIG. 4, the thickness is switched so as to have a thin portion a around the stirring section 3 and a boundary A, and the outer circumference b,
The thickness changes of c and d change so as to increase continuously toward the cylindrical portion. Further, in the embodiment shown in FIG. 5, the thin portion 6 is formed around the inner periphery of the flexible portion 9, that is, around the stirring portion 3, and the thick portion 7 is formed by switching the thickness with the boundary A on the outer periphery. I have. The thickness of the thin portion 6 and the thickness of the thick portion 7 do not change and are constant.
【００１３】本発明の各部材に用いられる素材について
説明する。本発明の筒状部８は、剛性のある素材が好ま
しく、硬質樹脂、金属等が挙げられる。本発明の可撓部
９は、ゴム状弾性体が好ましく、公知の合成ゴム、熱可
塑性エラストマーから適宜選択される。例えば、合成ゴ
ムはスチレンブタジエンゴム、ブタジエンゴム、クロロ
プレンゴム、ニトリルブタジエンゴム、ブチルゴム、エ
チレンプロピレンゴム、ウレタンゴム、シリコーンゴ
ム、フッ素ゴム、アクリルゴム等が挙げられ、熱可塑性
エラストマーはスチレン系、オレフィン系、ウレタン
系、エステル系、塩化ビニル系等が挙げられる。筒状部
に熱可塑性硬質樹脂を用いて可撓部に熱可塑性エラスト
マーを用いた場合は、熱融着による２色成形が可能とな
る。本発明の蓋５は、剛性のある素材又はゴム状弾性体
の単体材料でも、両者の組合せによる複合材料でもかま
わない。The materials used for each member of the present invention will be described. The tubular portion 8 of the present invention is preferably made of a rigid material, such as a hard resin or a metal. The flexible portion 9 of the present invention is preferably a rubber-like elastic body, and is appropriately selected from known synthetic rubbers and thermoplastic elastomers. For example, synthetic rubber includes styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, butyl rubber, ethylene propylene rubber, urethane rubber, silicone rubber, fluoro rubber, acrylic rubber, and the like. , Urethane type, ester type, vinyl chloride type and the like. When a thermoplastic hard resin is used for the cylindrical portion and a thermoplastic elastomer is used for the flexible portion, two-color molding by heat fusion becomes possible. The lid 5 of the present invention may be a rigid material or a single material of a rubber-like elastic body, or a composite material obtained by combining both materials.
【００１４】[0014]
【実施例１】硬度３０°(ＪＩＳ Ｋ６２５３ タイプＡ)
の熱可塑性スチレン系エラストマーであるゴム状弾性体
からなる可撓部９及び攪拌部３と、熱可塑性硬質樹脂か
らなる筒状部８から構成される容器１内に粘性流体２を
充填し、熱可塑性硬質樹脂からなる蓋５によって密封し
てバネ定数可変型粘性流体封入式ダンパーを得た。粘性
流体２には、回転粘度１２０万ｃｓのシリコーングリス
を用いた。ここで、可撓部９を構成する薄肉部６の肉厚
は２.５ｍｍ、厚肉部７の肉厚は５ｍｍであり、攪拌部
３の周囲に薄肉部６が設けられ、更に薄肉部６の外周に
厚肉部８が設けられている。Example 1 Hardness 30 ° (JIS K6253 Type A)
A viscous fluid 2 is filled in a container 1 comprising a flexible portion 9 and a stirring portion 3 made of a rubber-like elastic body, which is a thermoplastic styrene-based elastomer, and a tubular portion 8 made of a thermoplastic hard resin. Sealing was performed with a lid 5 made of a plastic hard resin to obtain a viscous fluid-filled damper having a variable spring constant. As the viscous fluid 2, silicone grease having a rotational viscosity of 1.2 million cs was used. Here, the thickness of the thin portion 6 constituting the flexible portion 9 is 2.5 mm, the thickness of the thick portion 7 is 5 mm, and the thin portion 6 is provided around the stirring portion 3. Is provided with a thick portion 8 on the outer periphery of.
【００１５】[0015]
【実施例２】可撓部９を構成する薄肉部６の肉厚は２.
５ｍｍ、厚肉部７の肉厚は３.８ｍｍであり、攪拌部３
の周囲に薄肉部６が設けられ、更に薄肉部６の外周に厚
肉部７が設けられ、他は実施例１と同じ構成である、実
施例２のバネ定数可変型粘性流体封入式ダンパーを得
た。Embodiment 2 The thickness of the thin portion 6 constituting the flexible portion 9 is 2.
5 mm, and the thickness of the thick portion 7 is 3.8 mm.
A thin-walled portion 6 is provided around the periphery of the thin-walled portion 6, and a thick-walled portion 7 is further provided on the outer periphery of the thin-walled portion 6. The other configuration is the same as that of the first embodiment. Obtained.
【００１６】[0016]
【実施例３】可撓部９を構成する薄肉部６の肉厚は２.
５ｍｍ、厚肉部７の肉厚は７.５ｍｍであり、攪拌部３
の周囲に薄肉部６が設けられ、更に薄肉部６の外周に厚
肉部７が設けられ、他は実施例１と同じ構成である、実
施例３のバネ定数可変型粘性流体封入式ダンパーを得
た。Third Embodiment The thickness of the thin portion 6 constituting the flexible portion 9 is 2.
5 mm, the thickness of the thick portion 7 is 7.5 mm, and the stirring portion 3
A thin-walled portion 6 is provided around the periphery of the thin-walled portion 6, and a thick-walled portion 7 is further provided on the outer periphery of the thin-walled portion 6. The other configuration is the same as that of the first embodiment. Obtained.
【００１７】[0017]
【実施例４】可撓部９を構成する薄肉部６の肉厚は２．
５ｍｍ、厚肉部７の肉厚は５ｍｍであり、攪拌部３の周
囲に厚肉部７が設けられ、更に厚肉部７の外周に薄肉部
６が設けられ、他は実施例１と同じ構成である、実施例
４のバネ定数可変型粘性流体封入式ダンパーを得た。Embodiment 4 The thickness of the thin portion 6 constituting the flexible portion 9 is 2.
5 mm, the thickness of the thick portion 7 is 5 mm, the thick portion 7 is provided around the stirring portion 3, and the thin portion 6 is further provided on the outer periphery of the thick portion 7. A viscous fluid-filled damper having a variable spring constant according to Example 4 having a configuration was obtained.
【００１８】[0018]
【実施例５】可撓部９を構成する薄肉部６の肉厚は２．
５ｍｍ、厚肉部７の肉厚は３．８ｍｍであり、攪拌部３
の周囲に厚肉部７が設けられ、更に厚肉部７の外周に薄
肉部６が設けられ、他は実施例１と同じ構成である、実
施例５のバネ定数可変型粘性流体封入式ダンパーを得
た。Embodiment 5 The thickness of the thin portion 6 constituting the flexible portion 9 is 2.
5 mm, the thickness of the thick portion 7 is 3.8 mm,
A thick-walled portion 7 is provided around the periphery of the thick-walled portion 7, and a thin-walled portion 6 is provided on the outer periphery of the thick-walled portion 7. The other structure is the same as that of the first embodiment. I got
【００１９】[0019]
【実施例６】可撓部９を構成する薄肉部６の肉厚は２．
５ｍｍ、厚肉部７の肉厚は７．５ｍｍであり、攪拌部３
の周囲に厚肉部７が設けられ、更に厚肉部７の外周に薄
肉部６が設けられ、他は実施例１と同じ構成である、実
施例６のバネ定数可変型粘性流体封入式ダンパーを得
た。Embodiment 6 The thickness of the thin portion 6 constituting the flexible portion 9 is 2.
5 mm, the thickness of the thick portion 7 is 7.5 mm, and the stirring portion 3
A thick-walled portion 7 is provided around the outer periphery of the thick-walled portion 7, and a thin-walled portion 6 is provided on the outer periphery of the thick-walled portion 7. The other structure is the same as that of the first embodiment. I got
【００２０】[0020]
【比較例１】可撓部９の肉厚は３ｍｍと一定にした。他
の構成は実施例１と同じとし比較例１の粘性流体封入式
ダンパーを得た。Comparative Example 1 The thickness of the flexible portion 9 was fixed at 3 mm. Other configurations were the same as in Example 1 to obtain a viscous fluid-filled damper of Comparative Example 1.
【００２１】以上の実施例１〜６及び比較例１のバネ定
数可変型粘性流体封入式ダンパーの防振効果を次の試験
方法で評価し、その結果を表１に示す。図７に示すよう
に、被支持体１０から４本の剛体のシャフト４が突起し
ていて、このシャフト４を４個の粘性流体封入式ダンパ
ー１１に挿入し下面から被支持体を支持し、また４本の
引張りコイルスプリング１２でフレーム１３から吊るし
て被支持体を支持している。この粘性流体封入式ダンパ
ー１１およびフレーム１３は加振テーブル１４上に固定
されている。The vibration damping effects of the viscous fluid-filled dampers with variable spring constants of Examples 1 to 6 and Comparative Example 1 were evaluated by the following test methods, and the results are shown in Table 1. As shown in FIG. 7, four rigid shafts 4 protrude from the supported body 10, and the shafts 4 are inserted into four viscous fluid-filled dampers 11 to support the supported body from below. Further, the supported member is suspended from the frame 13 by four tension coil springs 12. The viscous fluid-filled damper 11 and the frame 13 are fixed on a vibration table 14.
【表１】 [Table 1]
【００２２】加振テーブル１４を上下方向に一定加速度
で周波数８〜２００Ｈｚの範囲で振動させ、被支持体１
０への振動伝達率を測定することによって防振効果を評
価した。共振倍率は共振周波数において加振テーブルか
らの振動入力加速度ａ１に対し被支持体からの振動出力
加速度ａ２を測定し、20Log（ａ２／ａ１）の関係式で
換算し、また１００Hzの振動伝達率も同様に求めた。比
較例１の可撓部９の肉厚が一定のものに対して実施例１
〜６は、振幅の大きい共振点付近において厚肉部７も可
動したことによるバネ定数上昇の影響を受け、共振倍率
の低下が確認された。また防振領域である高周波数域
（１００Ｈｚ付近）において、薄肉部６が主に可動した
ことによって比較例１に対して同等の振動伝達率を保っ
ており、以上から実施例１〜６は優れた振動減衰効果が
認められた。The vibrating table 14 is vibrated at a constant acceleration in the vertical direction within a frequency range of 8 to 200 Hz, and
The vibration isolation effect was evaluated by measuring the vibration transmissibility to zero. Resonance magnification to measure the vibration output acceleration a 2 from the supported body to vibration input acceleration a 1 from the excitation table at the resonance frequency, converted by the relational expression 20 Log (a 2 / a 1), also of 100Hz The vibration transmissibility was determined similarly. Example 1 in which the thickness of the flexible portion 9 of Comparative Example 1 was constant.
In Nos. To 6, the reduction of the resonance magnification was confirmed due to the influence of the increase in the spring constant due to the movement of the thick portion 7 near the resonance point having a large amplitude. Further, in the high frequency range (around 100 Hz), which is a vibration proof region, the thin portion 6 mainly moved, so that the same vibration transmissibility as that of Comparative Example 1 was maintained. A vibration damping effect was observed.
【００２３】[0023]
【発明の効果】本発明のバネ定数可変型粘性流体封入式
ダンパーは、可撓部の肉厚に変化を持たせることで、低
周波数域から高周波数域まで広い周波数域で大きい減衰
効果を持ち、且つ被支持体の共振周波数での共振倍率を
抑えることができた。さらに実際の機器に使用する場合
は、共振点付近での音飛び、誤動作の発生を防止する効
果が期待され、また、振幅の小さい高周波数では内部の
粘性流体の流動抵抗により減衰効果を発揮することが可
能である。The variable spring constant type viscous fluid-filled damper of the present invention has a large damping effect in a wide frequency range from a low frequency range to a high frequency range by changing the thickness of the flexible portion. In addition, the resonance magnification at the resonance frequency of the supported member could be suppressed. Furthermore, when used in actual equipment, it is expected to have the effect of preventing sound skipping near the resonance point and the occurrence of malfunctions, and at high frequencies with small amplitudes, exhibit an attenuation effect due to the flow resistance of the viscous fluid inside. It is possible.
【図１】本発明のバネ定数可変型粘性流体封入式ダンパ
ーの断面図FIG. 1 is a cross-sectional view of a variable spring constant type viscous fluid-filled damper of the present invention.
【図２】本発明のバネ定数可変型粘性流体封入式ダンパ
ーの断面図FIG. 2 is a sectional view of a viscous fluid-filled damper having a variable spring constant according to the present invention.
【図３】本発明のバネ定数可変型粘性流体封入式ダンパ
ーの断面図FIG. 3 is a sectional view of a variable spring constant type viscous fluid-filled damper of the present invention.
【図４】本発明のバネ定数可変型粘性流体封入式ダンパ
ーの断面図FIG. 4 is a sectional view of a viscous fluid-filled damper having a variable spring constant according to the present invention.
【図５】本発明のバネ定数可変型粘性流体封入式ダンパ
ーの断面図FIG. 5 is a cross-sectional view of a spring constant variable type viscous fluid filled damper of the present invention.
【図６】従来の粘性流体封入式ダンパーの断面図FIG. 6 is a sectional view of a conventional viscous fluid-filled damper.
【図７】振動伝達試験装置を示す模式図FIG. 7 is a schematic diagram showing a vibration transmission test device.
１ 容器 ２ 粘性流体 ３ 攪拌部 ４ シャフト ５ 蓋 ６ 薄肉部 ７ 厚肉部 ８ 筒状部 ９ 可撓部 １０ 被支持体 １１ 粘性流体封入式ダンパー １２ コイルスプリング １３ フレーム １４ 加振テーブル Ａ 境界 DESCRIPTION OF SYMBOLS 1 Container 2 Viscous fluid 3 Stirrer 4 Shaft 5 Lid 6 Thin part 7 Thick part 8 Cylindrical part 9 Flexible part 10 Supported body 11 Viscous fluid enclosed damper 12 Coil spring 13 Frame 14 Vibration table A Boundary
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年１２月１０日（１９９９．１２．
１０）[Submission date] December 10, 1999 (1999.12.
10)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１４[Correction target item name] 0014
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１４】[0014]
【実施例１】硬度３０°(ＪＩＳ Ｋ６２５３ タイプＡ)
の熱可塑性スチレン系エラストマーであるゴム状弾性体
からなる可撓部９及び攪拌部３と、熱可塑性硬質樹脂か
らなる筒状部８から構成される容器１内に粘性流体２を
充填し、熱可塑性硬質樹脂からなる蓋５によって密封し
てバネ定数可変型粘性流体封入式ダンパーを得た。粘性
流体２には、回転粘度１２０万ｃｓのシリコーングリス
を用いた。ここで、可撓部９を構成する薄肉部６の肉厚
は０.２５ｍｍ、厚肉部７の肉厚は０.５ｍｍであり、攪
拌部３の周囲に薄肉部６が設けられ、更に薄肉部６の外
周に厚肉部８が設けられている。Example 1 Hardness 30 ° (JIS K6253 Type A)
A viscous fluid 2 is filled in a container 1 comprising a flexible portion 9 and a stirring portion 3 made of a rubber-like elastic body, which is a thermoplastic styrene-based elastomer, and a tubular portion 8 made of a thermoplastic hard resin. Sealing was performed with a lid 5 made of a plastic hard resin to obtain a viscous fluid-filled damper having a variable spring constant. As the viscous fluid 2, silicone grease having a rotational viscosity of 1.2 million cs was used. Here, the thickness of the thin portion 6 constituting the flexible portion 9 is 0.25 mm, the thickness of the thick portion 7 is 0.5 mm, and the thin portion 6 is provided around the stirring portion 3. A thick portion 8 is provided on the outer periphery of the portion 6.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Correction target item name] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１５】[0015]
【実施例２】可撓部９を構成する薄肉部６の肉厚は０.
２５ｍｍ、厚肉部７の肉厚は０.３８ｍｍであり、攪拌
部３の周囲に薄肉部６が設けられ、更に薄肉部６の外周
に厚肉部７が設けられ、他は実施例１と同じ構成であ
る、実施例２のバネ定数可変型粘性流体封入式ダンパー
を得た。[Embodiment 2] The thickness of the thin portion 6 constituting the flexible portion 9 is 0.1 mm.
25 mm, the thickness of the thick portion 7 is 0.38 mm, a thin portion 6 is provided around the stirring portion 3, and a thick portion 7 is further provided on the outer periphery of the thin portion 6. A viscous fluid-filled damper with a variable spring constant of Example 2 having the same configuration was obtained.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１６】[0016]
【実施例３】可撓部９を構成する薄肉部６の肉厚は０.
２５ｍｍ、厚肉部７の肉厚は０.７５ｍｍであり、攪拌
部３の周囲に薄肉部６が設けられ、更に薄肉部６の外周
に厚肉部７が設けられ、他は実施例１と同じ構成であ
る、実施例３のバネ定数可変型粘性流体封入式ダンパー
を得た。[Embodiment 3] The thickness of the thin portion 6 constituting the flexible portion 9 is 0.1 mm.
25 mm, the thickness of the thick portion 7 is 0.75 mm, the thin portion 6 is provided around the stirring portion 3, and the thick portion 7 is further provided on the outer periphery of the thin portion 6. A spring constant variable type viscous fluid-filled damper of Example 3 having the same configuration was obtained.
【手続補正４】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１７】[0017]
【実施例４】可撓部９を構成する薄肉部６の肉厚は０.
２５ｍｍ、厚肉部７の肉厚は０.５ｍｍであり、攪拌部
３の周囲に厚肉部７が設けられ、更に厚肉部７の外周に
薄肉部６が設けられ、他は実施例１と同じ構成である、
実施例４のバネ定数可変型粘性流体封入式ダンパーを得
た。[Embodiment 4] The thickness of the thin portion 6 constituting the flexible portion 9 is 0.5 mm.
The thickness of the thick portion 7 is 0.5 mm, and the thick portion 7 is provided around the stirring portion 3, and the thin portion 6 is provided on the outer periphery of the thick portion 7. Has the same configuration as
A viscous fluid-filled damper having a variable spring constant of Example 4 was obtained.
【手続補正５】[Procedure amendment 5]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１８[Correction target item name] 0018
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１８】[0018]
【実施例５】可撓部９を構成する薄肉部６の肉厚は０.
２５ｍｍ、厚肉部７の肉厚は０.３８ｍｍであり、攪拌
部３の周囲に厚肉部７が設けられ、更に厚肉部７の外周
に薄肉部６が設けられ、他は実施例１と同じ構成であ
る、実施例５のバネ定数可変型粘性流体封入式ダンパー
を得た。[Embodiment 5] The thickness of the thin portion 6 constituting the flexible portion 9 is 0.5 mm.
25 mm, the thickness of the thick portion 7 is 0.38 mm, the thick portion 7 is provided around the stirring portion 3, and the thin portion 6 is further provided on the outer periphery of the thick portion 7. A viscous fluid-filled damper of the spring constant variable type having the same configuration as that of Example 5 was obtained.
【手続補正６】[Procedure amendment 6]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１９[Correction target item name] 0019
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００１９】[0019]
【実施例６】可撓部９を構成する薄肉部６の肉厚は０.
２５ｍｍ、厚肉部７の肉厚は０.７５ｍｍであり、攪拌
部３の周囲に厚肉部７が設けられ、更に厚肉部７の外周
に薄肉部６が設けられ、他は実施例１と同じ構成であ
る、実施例６のバネ定数可変型粘性流体封入式ダンパー
を得た。[Embodiment 6] The thickness of the thin portion 6 constituting the flexible portion 9 is set to be 0.
25 mm, the thickness of the thick portion 7 is 0.75 mm, the thick portion 7 is provided around the stirring portion 3, and the thin portion 6 is further provided on the outer periphery of the thick portion 7. A viscous fluid-filled damper with variable spring constant of Example 6 having the same configuration as that of Example 6 was obtained.
【手続補正７】[Procedure amendment 7]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００２０[Correction target item name] 0020
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【００２０】[0020]
【比較例１】可撓部９の肉厚は０.３ｍｍと一定にし
た。他の構成は実施例１と同じとし比較例１の粘性流体
封入式ダンパーを得た。Comparative Example 1 The thickness of the flexible portion 9 was fixed at 0.3 mm. Other configurations were the same as in Example 1 to obtain a viscous fluid-filled damper of Comparative Example 1.
Claims (4)
部を繋ぐゴム状弾性体からなる可撓部とにより構成され
る容器と、蓋とにより粘性流体が封入され、外部からの
振動に対し該攪拌部が該粘性流体中を移動することで生
じる粘性抵抗により振動減衰をおこなうダンパーにおい
て、可撓部の肉厚が、攪拌部周辺の肉厚と筒状部周辺の
肉厚が異なる肉厚で形成されていることを特徴とするバ
ネ定数可変型粘性流体封入式ダンパー。A viscous fluid is sealed by a container comprising a stirrer, a tubular portion, a flexible portion made of a rubber-like elastic body connecting the stirrer and the tubular portion, and a lid, In a damper that attenuates vibration due to viscous resistance generated by the stirring section moving in the viscous fluid in response to vibration from the outside, the thickness of the flexible section is increased by the thickness around the stirring section and the thickness around the cylindrical section. A viscous fluid-filled damper having a variable spring constant, characterized in that it is formed with different wall thicknesses.
けて厚肉にあるいは薄肉に、また連続してあるいは段階
的に変化するように形成されていることを特徴とする請
求項１に記載のバネ定数可変型粘性流体封入式ダンパ
ー。2. The flexible portion is characterized in that the thickness of the flexible portion is changed from the stirring portion to the cylindrical portion so as to be thicker or thinner, and continuously or stepwise. The damper according to claim 1, wherein the spring constant is variable.
けて境界を有して厚さが切り替わるように形成されてい
ることを特徴とする請求項１に記載のバネ定数可変型粘
性流体封入式ダンパー。3. The spring constant according to claim 1, wherein the thickness of the flexible portion is formed so that the thickness switches with a boundary from the agitating portion toward the cylindrical portion. Variable type viscous fluid filled damper.
１.０：１.１から１.０：５.０であることを特徴とする
請求項１、２、３のうちの１に記載のバネ定数可変型粘
性流体封入式ダンパー。4. The ratio of the thickness of the thin portion to the thickness of the flexible portion is as follows:
The viscous fluid-filled damper according to any one of claims 1, 2, and 3, wherein the damper ratio is 1.0: 1.1 to 1.0: 5.0.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22602699A JP3987242B2 (en) | 1999-08-10 | 1999-08-10 | Viscous fluid enclosed damper with variable spring constant |
| US09/629,811 US6439551B1 (en) | 1999-08-10 | 2000-07-31 | Variable spring constant type damper filled with viscous fluid |
| EP00306759A EP1076189B1 (en) | 1999-08-10 | 2000-08-08 | Variable spring constant type damper filled with viscous fluid |
| DE60017030T DE60017030T2 (en) | 1999-08-10 | 2000-08-08 | Damper of variable spring stiffness, filled with viscous fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22602699A JP3987242B2 (en) | 1999-08-10 | 1999-08-10 | Viscous fluid enclosed damper with variable spring constant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001050332A true JP2001050332A (en) | 2001-02-23 |
| JP3987242B2 JP3987242B2 (en) | 2007-10-03 |
Family
ID=16838630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22602699A Expired - Lifetime JP3987242B2 (en) | 1999-08-10 | 1999-08-10 | Viscous fluid enclosed damper with variable spring constant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3987242B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275217A (en) * | 2005-03-30 | 2006-10-12 | Tokai Rubber Ind Ltd | Shaft body integrated viscous fluid sealed damper |
-
1999
- 1999-08-10 JP JP22602699A patent/JP3987242B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006275217A (en) * | 2005-03-30 | 2006-10-12 | Tokai Rubber Ind Ltd | Shaft body integrated viscous fluid sealed damper |
| JP4539402B2 (en) * | 2005-03-30 | 2010-09-08 | 東海ゴム工業株式会社 | Shaft body integrated viscous fluid-filled damper and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3987242B2 (en) | 2007-10-03 |
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