JPS596446A - Device for regulating damping-force in hydraulic buffer - Google Patents
Device for regulating damping-force in hydraulic bufferInfo
- Publication number
- JPS596446A JPS596446A JP11519582A JP11519582A JPS596446A JP S596446 A JPS596446 A JP S596446A JP 11519582 A JP11519582 A JP 11519582A JP 11519582 A JP11519582 A JP 11519582A JP S596446 A JPS596446 A JP S596446A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- piston
- damping force
- damper case
- magnetic
- 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
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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はピストンの伸縮動作に伴って、その流速に抵抗
を与えて減衰力を発生させる油圧緩衝器において、減衰
力の大きさを外部から任意に調整し得る減衰力調整装置
を備えた油圧緩衝器に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a hydraulic shock absorber that generates a damping force by applying resistance to the flow velocity as the piston expands and contracts, and the damping force that can arbitrarily adjust the magnitude of the damping force from the outside. The present invention relates to a hydraulic shock absorber with an adjustment device.
従来、この種の油圧緩衝器において、減衰力の大きさを
任意に調整するためには減衰弁を設けて外部から調整す
るようにしているが、複雑か機構と多数の部品を使用し
かければならなかった。Conventionally, in this type of hydraulic shock absorber, in order to arbitrarily adjust the magnitude of the damping force, a damping valve is provided and the adjustment is made from the outside, but this method is complicated and requires a large number of parts and a complicated mechanism. did not become.
本発明は、このよう々従来の問題点を基本的に変えるも
ので、簡単でしかも確実に作用する装置を提供せんとす
るものである。以下本発明の一実施例を図面により詳細
に説明する。The present invention fundamentally changes these conventional problems and seeks to provide a device that is simple and works reliably. An embodiment of the present invention will be described in detail below with reference to the drawings.
第１図は本発明減衰力調整装置の一実施例を示す断面図
である。図において、１は中空のピストンロッド２の先
端に嵌装したピストン３を、内部、に磁性流体を封入し
たダンパ（−ケース４内ＫＭ動自在に嵌合しピストンロ
ッド２の植設基部５とダンパーケース４間にコイルばね
６を張架してなる（第 ３ 頁）
油圧緩衝器で、ピストン３に設けた油孔７，８及び弁機
構９，１０により圧縮行程、伸長行程の減衰力を得るよ
うにしである。FIG. 1 is a sectional view showing an embodiment of the damping force adjusting device of the present invention. In the figure, 1 indicates a piston 3 fitted to the tip of a hollow piston rod 2, and a damper (-KM inside a case 4) having a magnetic fluid sealed therein. A hydraulic shock absorber consisting of a coil spring 6 stretched between the damper cases 4 (page 3), which uses oil holes 7 and 8 provided in the piston 3 and valve mechanisms 9 and 10 to absorb the damping force during the compression stroke and extension stroke. That's how you get it.
一方、ダンパーケース４内の上部中央より突出せしめた
ロッド１１を前記ピストンロッド２の中空部２ａ内に挿
入し、ピストン３の一部に縮径段部３ａを設けてロッド
１１と線条段部３ａの間に適尚な隙間１２を通してダン
パ−ケース４、ピストン３、ロッド１１間に磁気回路を
形成せしめる。そして、この磁気回路の一部例えばロッ
ド１１に電磁コイル１３を設けておく。また、ピストン
ロッド２に設けた油孔１４と前記隙間１２を介してダン
パーケース４の下部油室Ａから上部油室Ｂに連通する油
路を設けたものである。なお１５は別置のタンクで、グ
イアクラム１５ ａを介して油室Ｃと気体室りとに区画
され、油室Ｃはダンパーケース４の上部油室Ｂと可撓性
パイプ１６で連絡せしめてピストンロッド２の伸縮によ
りダン・臂−ケース４内の体積の変化分に対する油の吸
収及び排出を行なわせる。また油圧緩衝器１の油中には
磁性体を混合せしめた磁性Ｃｔｇ ４ ＊）
特開日’Ｑ ５９−８４４６ （２）流体が封入され
る。On the other hand, the rod 11 protruding from the center of the upper part of the damper case 4 is inserted into the hollow part 2a of the piston rod 2, and a diameter-reducing step part 3a is provided in a part of the piston 3, and the rod 11 and the linear step part are provided. A magnetic circuit is formed between the damper case 4, the piston 3, and the rod 11 through a suitable gap 12 between the damper case 3a. An electromagnetic coil 13 is provided in a part of this magnetic circuit, for example, the rod 11. Further, an oil passage is provided which communicates from the lower oil chamber A to the upper oil chamber B of the damper case 4 via the oil hole 14 provided in the piston rod 2 and the gap 12. Reference numeral 15 denotes a separately placed tank, which is divided into an oil chamber C and a gas chamber via a guiaclum 15a, and the oil chamber C is connected to the upper oil chamber B of the damper case 4 by a flexible pipe 16, and is connected to the piston. By expanding and contracting the rod 2, oil is absorbed and discharged according to the change in volume within the arm case 4. In addition, the oil of the hydraulic shock absorber 1 contains a magnetic Ctg4*) in which a magnetic material is mixed.
JP-A-59-8446 (2) Fluid is sealed.
次に、その動作を説明する。Next, its operation will be explained.
緩衝器の圧縮行程時、油室Ｂ内が圧縮されて高圧となる
が、一部はタンク１５の油室Ｃに吸収される。しかしピ
ストンロッド２の中空部２ａ内にロッド１１が侵入する
ので中空部２ａ内がより高圧となり、磁性流体は中空部
２ａ内より隙間１２を通って油室Ｂに流れ込むと同時に
弁機構１０は油室Ｂの内圧により座着し、そのため、油
室Ｂの磁性流体は油孔７より弁機構（コンプレッション
パルプ）９を押し開いて下部油室Ａに流れ、両者で緩衝
作用が行なわれる。During the compression stroke of the shock absorber, the inside of the oil chamber B is compressed and becomes high pressure, but a portion of the pressure is absorbed into the oil chamber C of the tank 15. However, since the rod 11 enters into the hollow part 2a of the piston rod 2, the pressure in the hollow part 2a becomes higher, and the magnetic fluid flows from the hollow part 2a through the gap 12 into the oil chamber B. At the same time, the valve mechanism 10 The magnetic fluid in the oil chamber B pushes open the valve mechanism (compression pulp) 9 through the oil hole 7 and flows into the lower oil chamber A, and a buffering effect is performed between the two.
この場合、電磁コイル１３に外部より通電しておくと通
電の大きさにより隙間１２における磁界の強さが増加し
、したがって隙間１２に流れる磁性流体の粘度も増加し
、減衰力も大きくなる。即ち減衰力を調整することがで
きる。In this case, if the electromagnetic coil 13 is energized from the outside, the strength of the magnetic field in the gap 12 will increase depending on the magnitude of the energization, and therefore the viscosity of the magnetic fluid flowing in the gap 12 will also increase, and the damping force will also increase. That is, the damping force can be adjusted.
一方、伸長行程時には、反対に油室Ｂ内が負圧になシ、
一部はタンク１５の油室Ｃから補充されるが、中空部２
ａ内よりロッド１１が引き抜かれるた（第 ３ 点り
め中空部２ａ内がより負圧となる。したがって、油室Ｂ
内の磁性流体が隙間１２を通って中空部２ａ内に流れ込
むと四時釦油室Ａ内の磁性流体も油孔１４より中空部２
ａ内に流れる。一方、弁機構９はダンパーケース４の下
部油室Ａの内圧により座着するので、油室Ａの磁性流体
は油孔８より弁機構１０を押し開いて上部油室Ｂに流れ
、両者で緩衝作用が行なわれる。したがって圧縮行程と
同じく減衰力を調整することができる。On the other hand, during the extension stroke, there is no negative pressure in the oil chamber B.
A part of the oil is replenished from the oil chamber C of the tank 15, but the hollow part 2
Since the rod 11 is pulled out from inside a (third point, the inside of the hollow part 2a becomes more negative pressure. Therefore, the oil chamber B
When the magnetic fluid inside flows into the hollow part 2a through the gap 12, the magnetic fluid in the four o'clock button oil chamber A also flows through the oil hole 14 into the hollow part 2a.
flows within a. On the other hand, the valve mechanism 9 is seated due to the internal pressure in the lower oil chamber A of the damper case 4, so the magnetic fluid in the oil chamber A pushes open the valve mechanism 10 through the oil hole 8 and flows into the upper oil chamber B, and the two are buffered. action is taken. Therefore, the damping force can be adjusted in the same way as in the compression stroke.
その動作特性を横軸にピストン速度、縦軸の上方に伸張
時の減衰力、下方に圧縮時の減衰力で示すと第２図のと
おりとなる。但し、ｍ、…′は無電流の場合、ｎ 、
ｎ’は一定の電流を流した場合の特性曲線である。勿論
ピストン３の摺動により磁気回路の磁路長が変化するの
で磁気抵抗が変化し、これにより位置依存の減衰力可変
が可能にもなる。またロッド１１をテーパー状にするこ
とによりピストン３の位置における磁気抵抗を変化させ
、同じく位置の減衰力可変も可能である。The operating characteristics are shown in Fig. 2, with the horizontal axis representing the piston speed, the vertical axis representing the damping force during extension, and the vertical axis representing the damping force during compression. However, m,...' is n when there is no current,
n' is a characteristic curve when a constant current is applied. Of course, the sliding of the piston 3 changes the magnetic path length of the magnetic circuit, so the magnetic resistance changes, and this also makes it possible to vary the damping force depending on the position. Furthermore, by making the rod 11 tapered, the magnetic resistance at the position of the piston 3 can be changed, and the damping force at the position can also be varied.
以上詳細に説明したように、本発明によれは極（第５３
３〕
めて簡単な構成で、しかも確実に減衰力を外部より調整
できる効果がある。As explained in detail above, according to the present invention, the pole (53rd
3) It has the simplest configuration and has the effect of being able to reliably adjust the damping force from the outside.
第１図は本発明油圧緩衝器における減衰力調整＠置の一
実施例を示す断面図、第２図は同じくその減衰力の特性
曲線を示す図である。
１・・・油圧緩衝器、２・・・ピストンロッド、２ａ・
・・中空部、３・・・ピストン、３ａ・・・縮径段部、
４・・・ダンパーケース、６・・・コイルばね、７，８
・・・油孔、９．１０・・・弁機構、１１・・・ロッド
、１２・・・隙間、１３・・・電磁コイル、１４・・・
油孔、１５・・・タンク、Ａ、Ｂ、Ｃ・・・油室、Ｄ・
・・気体室FIG. 1 is a sectional view showing an embodiment of damping force adjustment in a hydraulic shock absorber according to the present invention, and FIG. 2 is a diagram showing a characteristic curve of the damping force. 1... Hydraulic shock absorber, 2... Piston rod, 2a.
...Hollow part, 3...Piston, 3a...Reduced diameter step part,
4... Damper case, 6... Coil spring, 7, 8
... Oil hole, 9.10 ... Valve mechanism, 11 ... Rod, 12 ... Gap, 13 ... Electromagnetic coil, 14 ...
Oil hole, 15... Tank, A, B, C... Oil chamber, D.
・Gas chamber
Claims (1)
を発生する弁機構を備えたピストンを、磁性流体を封入
し象ダン・臂−ケース内に摺動自在に嵌装し、一方、ダ
ンパ−ケース内に突出せしめ九ロッドを前記ピストンロ
ッドの中空部に挿入し、かつピストンの一部に縮径段部
を設けてロッドと縮径段部間に適当な隙間を設はダンパ
ーケース、ピストン、ロッド間に磁気回路を形成し、か
つその一部に電磁コイルを設けると共にピストンロッド
に設けた油孔と前記隙間を介してダン／’Ｐ−ケースの
下部油室から上部油室に連通ずる油路を設け、前記ピス
トン部とロッド間の隙間の磁界の強さを電磁コイルに通
電する電流によって変化せしめて隙間に流れる磁性流体
の粘度を変化させることによって減衰力を可変せしめる
ことを特徴とする油圧緩衝器における減衰力調整装置。 （第 ２ 頁）[Scope of Claims] A piston, which is equipped with a valve mechanism that generates a damping force during expansion and compression at the tip of a hollow piston rod, is filled with a magnetic fluid and is slidably fitted into a case. On the other hand, a nine-rod projecting into the damper case is inserted into the hollow part of the piston rod, and a diameter-reducing step is provided in a part of the piston to create an appropriate gap between the rod and the diameter-reducing step. A magnetic circuit is formed between the damper case, the piston, and the rod, and a part of the magnetic circuit is provided with an electromagnetic coil, and oil is supplied from the lower oil chamber of the damper case to the upper oil chamber through the oil hole provided in the piston rod and the gap. An oil passage communicating with the chamber is provided, and the strength of the magnetic field in the gap between the piston portion and the rod is changed by a current applied to the electromagnetic coil, thereby changing the viscosity of the magnetic fluid flowing in the gap, thereby varying the damping force. A damping force adjustment device for a hydraulic shock absorber, characterized in that: (Page 2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11519582A JPS596446A (en) | 1982-07-02 | 1982-07-02 | Device for regulating damping-force in hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11519582A JPS596446A (en) | 1982-07-02 | 1982-07-02 | Device for regulating damping-force in hydraulic buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS596446A true JPS596446A (en) | 1984-01-13 |
| JPS6218775B2 JPS6218775B2 (en) | 1987-04-24 |
Family
ID=14656705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11519582A Granted JPS596446A (en) | 1982-07-02 | 1982-07-02 | Device for regulating damping-force in hydraulic buffer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS596446A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184008A (en) * | 1983-03-31 | 1984-10-19 | Nhk Spring Co Ltd | Rolling stock suspender |
| CN102588498A (en) * | 2012-02-20 | 2012-07-18 | 东南大学 | No-leakage electromagnetic fluid body damper |
| CN102927191A (en) * | 2012-10-25 | 2013-02-13 | 中国民航大学 | Coil internally-installed type magnetorheological damper with oil needle |
| KR101305874B1 (en) * | 2012-04-18 | 2013-09-09 | 양동호 | Vibration absorber with variable stiffness |
-
1982
- 1982-07-02 JP JP11519582A patent/JPS596446A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59184008A (en) * | 1983-03-31 | 1984-10-19 | Nhk Spring Co Ltd | Rolling stock suspender |
| CN102588498A (en) * | 2012-02-20 | 2012-07-18 | 东南大学 | No-leakage electromagnetic fluid body damper |
| KR101305874B1 (en) * | 2012-04-18 | 2013-09-09 | 양동호 | Vibration absorber with variable stiffness |
| CN102927191A (en) * | 2012-10-25 | 2013-02-13 | 中国民航大学 | Coil internally-installed type magnetorheological damper with oil needle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6218775B2 (en) | 1987-04-24 |
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