JPH07103278A - Damping force adjusting mechanism of hydraulic shock absorber - Google Patents
Damping force adjusting mechanism of hydraulic shock absorberInfo
- Publication number
- JPH07103278A JPH07103278A JP24794593A JP24794593A JPH07103278A JP H07103278 A JPH07103278 A JP H07103278A JP 24794593 A JP24794593 A JP 24794593A JP 24794593 A JP24794593 A JP 24794593A JP H07103278 A JPH07103278 A JP H07103278A
- Authority
- JP
- Japan
- Prior art keywords
- damping force
- orifice
- rotary valve
- communication hole
- force adjusting
- 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
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は油圧緩衝器の減衰力調整
機構に関し、特にロータリバルブによって減衰力調整を
行うようにした機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping force adjusting mechanism for a hydraulic shock absorber, and more particularly to a mechanism for adjusting the damping force by a rotary valve.
【０００２】[0002]
【従来の技術】従来の油圧緩衝器として、図５及び図６
に示すように中空ロッド１０１の先端部に図示しないシ
リンダの内周面に摺接するピストン１０２を固着し、ピ
ストン１０２には減衰力発生用の油路１０３，１０４を
形成し、これらの油路１０３，１０４を開閉するバルブ
１０５，１０６を装着するとともに、減衰力を調整する
ため、中空ロッド１０１内にロッド１０７の先端部に一
体形成されたロータリバルブ１０８を回転自在に嵌挿
し、ロータリバルブ１０８には周方向に小径のオリフィ
ス１１０及び大径のオリフィス１１１を形成して、中空
ロッド１０１にはこれらオリフィス１１０，１１１に対
応する軸方向位置にピストン１０２の油路１０３，１０
４をバイパスする連通孔１１２を形成したものが知られ
ている。2. Description of the Related Art As a conventional hydraulic shock absorber, FIGS.
As shown in FIG. 3, a piston 102, which is in sliding contact with the inner peripheral surface of a cylinder (not shown), is fixed to the tip of the hollow rod 101, and oil passages 103 and 104 for generating damping force are formed in the piston 102. The valves 105 and 106 for opening and closing the valves 104 and 104 are mounted, and in order to adjust the damping force, the rotary valve 108 integrally formed at the tip of the rod 107 is rotatably fitted in the hollow rod 101, and is attached to the rotary valve 108. Forms a small diameter orifice 110 and a large diameter orifice 111 in the circumferential direction, and the hollow rod 101 has oil passages 103, 10 of the piston 102 at axial positions corresponding to these orifices 110, 111.
It is known that a communication hole 112 that bypasses 4 is formed.
【０００３】この油圧緩衝器の減衰力調整機構にあって
は、図６（ａ）に示すようにロータリバルブ１０８の各
オリフィス１１０，１１１と中空ロッド１０１の連通孔
１１２が対向しない状態にしたときには、ピストン１０
２の油路１０３をバイパスするバイパス流路が閉じられ
るので高い減衰力が得られるハードの状態になり、同図
（ｂ）に示すようにロータリバルブ１０８を回転して小
径のオリフィス１１０を連通孔１１２に対向させたとき
には、連通孔１１２を通じて作動油がバイパスされるの
で中間の減衰力が得られるミディアムの状態になり、同
図（ｃ）に示すようにロータリバルブ１０８を更に回転
して大径のオリフィス１１１を連通孔１１２に対向させ
たときには、連通孔１１２を通じて作動油がより多くバ
イパスされるので低い減衰力が得られるソフトの状態に
なり、減衰力を三段階に調整することができる。In the damping force adjusting mechanism of this hydraulic shock absorber, when the orifices 110 and 111 of the rotary valve 108 and the communication hole 112 of the hollow rod 101 are not opposed to each other as shown in FIG. 6A. , Piston 10
Since the bypass passage bypassing the second oil passage 103 is closed, a high damping force is obtained, and the rotary valve 108 is rotated to open the small-diameter orifice 110 to the communicating hole as shown in FIG. When it is opposed to 112, the hydraulic oil is bypassed through the communication hole 112, so that a medium state in which an intermediate damping force is obtained is obtained, and the rotary valve 108 is further rotated as shown in FIG. When the orifice 111 is opposed to the communication hole 112, a larger amount of hydraulic oil is bypassed through the communication hole 112, so that a low damping force is obtained and the damping force can be adjusted in three steps.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の減衰力
調整機構にあっては、減衰力をミディアムからソフトの
状態に調整する場合に、ロータリバルブを回転して減衰
力を調整するため、小径のオリフィス１１０と大径のオ
リフィス１１１との間では連通孔１１２が閉じられる状
態になり、図８に示すようにハードからミディアムへの
移行はスムーズに行えるが、ミディアムからソフトに移
行する場合には一旦ハードと同じ状態なった後ソフトに
移行することになり、乗り心地が悪くなる。In the conventional damping force adjusting mechanism described above, when the damping force is adjusted from medium to soft, the rotary valve is rotated to adjust the damping force. The communication hole 112 is closed between the orifice 110 of 110 and the large-diameter orifice 111, and as shown in FIG. 8, the transition from hard to medium can be performed smoothly, but in the case of medium to soft transition, Once it is in the same state as hardware, it will shift to soft, which makes the ride uncomfortable.
【０００５】そこで、実開昭６１−４０４６号公報、実
開昭６２−８９５４６号公報及び実開昭６２−１１７３
４２号公報に開示されているように、オリフィスをくさ
び状に形成したり、周方向の長孔とすることで減衰力の
変化がスムーズになるようにした減衰力調整機構も知ら
れている。Therefore, Japanese Utility Model Publication No. 61-4046, Japanese Utility Model Publication No. 62-89546, and Japanese Utility Model Publication No. 62-1173.
As disclosed in Japanese Patent Laid-Open No. 42-42, there is also known a damping force adjusting mechanism in which the damping force is smoothly changed by forming the orifice in a wedge shape or forming an elongated hole in the circumferential direction.
【０００６】しかしながら、上述した公報に記載される
ように減衰力調整用のオリフィスをくさび形状に形成し
たり、周方向の長孔とすることは、ロータリバルブの加
工が難しくなるとともに、強度も弱くなる。However, if the orifice for adjusting the damping force is formed in a wedge shape or has a long hole in the circumferential direction as described in the above-mentioned publication, it becomes difficult to process the rotary valve and the strength becomes weak. Become.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決すべく本
発明は、ロータリバルブには複数の径の異なる減衰力調
整用オリフィス間で、かつ減衰力調整用オリフィスとは
軸方向にずれた位置に中間オリフィスを形成し、中空部
材にはこの中間オリフィスに対応する連通孔を形成し
た。In order to solve the above-mentioned problems, the present invention provides a rotary valve having a plurality of damping force adjusting orifices having different diameters, and being axially displaced from the damping force adjusting orifices. An intermediate orifice was formed in the hollow member, and a communication hole corresponding to this intermediate orifice was formed in the hollow member.
【０００８】[0008]
【作用】ロータリバルブを回転することによって減衰力
調整用オリフィス間でこのオリフィスに対応する連通孔
が塞がれるとき、中間オリフィスがこのオリフィスに対
応する連通孔に対向してある程度のバイパス流路面積を
確保して作動油をバイパスさせ、極端に減衰力が高くな
ることを抑える。When the rotary valve is rotated to close the communication hole corresponding to this orifice between the damping force adjusting orifices, the intermediate orifice faces the communication hole corresponding to this orifice, and the bypass flow passage area is increased to some extent. To ensure that the hydraulic oil is bypassed and the damping force is prevented from becoming extremely high.
【０００９】[0009]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は本発明に係る減衰力調整機構
を適用した油圧緩衝器の要部断面図、図２は図１のＡ−
Ａ線に沿うロータリバルブの異なる回転位置での断面
図、図３は図１のＢ−Ｂ線に沿うロータリバルブの異な
る回転位置での断面図、図４は減衰力の変化を示す線図
である。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a sectional view of an essential part of a hydraulic shock absorber to which the damping force adjusting mechanism according to the present invention is applied, and FIG. 2 is A- in FIG.
FIG. 3 is a sectional view of the rotary valve at different rotational positions along the line A, FIG. 3 is a sectional view of the rotary valve at different rotational positions along the line BB of FIG. 1, and FIG. 4 is a diagram showing changes in damping force. is there.
【００１０】シリンダ１内には中空ロッド２が挿通さ
れ、中空ロッド２の先端部にはシリンダ１内周面に摺接
して上部油室Ｓ１と下部油室Ｓ２とを画成するピストン
３を装着し、ピストン３には圧縮側油路４及び伸び側油
路５を形成して、これらの油路４を開閉する圧縮側バル
ブ６及び油路５を開閉する伸び側バルブ７を装着し、こ
れらをリテーナ８と９との間で挟んでスペーサ１０を介
してナット１１にて締め付けて中空ロッド２先端部に固
着している。A hollow rod 2 is inserted into the cylinder 1, and a piston 3 which is slidably in contact with the inner peripheral surface of the cylinder 1 and defines an upper oil chamber S1 and a lower oil chamber S2 is attached to the distal end of the hollow rod 2. Then, a compression side oil passage 4 and an extension side oil passage 5 are formed in the piston 3, and a compression side valve 6 that opens and closes these oil passages 4 and an extension side valve 7 that opens and closes the oil passages 5 are attached. Is sandwiched between the retainers 8 and 9 and tightened with a nut 11 via a spacer 10 to be fixed to the distal end of the hollow rod 2.
【００１１】中空ロッド２内には操作ロッド１３の先端
部に一体的に形成したロータリバルブ１４を回転可能に
嵌挿し、図２にも示すように、ロータリバルブ１４の周
方向の異なる位置に減衰力調整用の小径のオリフィス１
５及び大径のオリフィス１６（いずれも円形状）を形成
し、中空ロッド２にはこれらのオリフィス１５，１６に
対応する軸方向位置に連通孔１７を形成している。A rotary valve 14, which is integrally formed at the tip of the operating rod 13, is rotatably fitted in the hollow rod 2 and is damped to different positions in the circumferential direction of the rotary valve 14 as shown in FIG. Small diameter orifice 1 for force adjustment
5 and a large-diameter orifice 16 (both of which are circular) are formed, and the hollow rod 2 is formed with a communication hole 17 at axial positions corresponding to these orifices 15, 16.
【００１２】また、図３にも示すように、ロータリバル
ブ１４には減衰力調整用の小径のオリフィス１５と大径
のオリフィス１６との間で、且つ軸方向に異なる位置に
中間オリフィス１８を形成し、中空ロッド２にはこの中
間オリフィス１８に対応する軸方向位置に連通孔１９を
形成している。尚、連通孔１７及び１９はいずれもピス
トン５の油路４，５をバイパスして油室Ｓ１，Ｓ２に通
じるようにされている。Further, as shown in FIG. 3, an intermediate orifice 18 is formed in the rotary valve 14 between the small-diameter orifice 15 and the large-diameter orifice 16 for adjusting the damping force and at different axial positions. A communication hole 19 is formed in the hollow rod 2 at an axial position corresponding to the intermediate orifice 18. The communication holes 17 and 19 bypass the oil passages 4 and 5 of the piston 5 and communicate with the oil chambers S1 and S2.
【００１３】以上のように構成した油圧緩衝器の減衰力
調整機構においては、図２（ａ）に示すようにロータリ
バルブ１４の各オリフィス１５，１６がいずれも中空ロ
ッド２の連通孔１７と対向しない状態にしたときには、
連通孔１７を通じて作動油がバイパスされない（バイパ
ス流路が閉じられた状態になる）ので高い減衰力が得ら
れるハードの状態になり、同図（ｂ）に示すようにロー
タリバルブ１４を回転して小径のオリフィス１５を連通
孔１７に対向させたときには、連通孔１７を通じて作動
油がバイパスされるので中間の減衰力が得られるミディ
アムの状態になり、同図（ｃ）に示すようにロータリバ
ルブ１４を更に回転して大径のオリフィス１６を連通孔
１７に対向させたときには、連通孔１７を通じて作動油
がより多くバイパスされるので低い減衰力が得られるソ
フトの状態になり、減衰力を三段階に調整することがで
きる。In the damping force adjusting mechanism for the hydraulic shock absorber constructed as described above, as shown in FIG. 2A, each of the orifices 15 and 16 of the rotary valve 14 faces the communicating hole 17 of the hollow rod 2. When you decide not to
Since the hydraulic fluid is not bypassed through the communication hole 17 (the bypass flow passage is closed), a high damping force can be obtained, and the rotary valve 14 is rotated as shown in FIG. When the small-diameter orifice 15 is opposed to the communication hole 17, the working oil is bypassed through the communication hole 17, so a medium state in which an intermediate damping force is obtained is obtained, and as shown in FIG. When the large-diameter orifice 16 is opposed to the communication hole 17 by further rotating, the hydraulic oil is more bypassed through the communication hole 17 so that a low damping force can be obtained in a soft state and the damping force can be divided into three stages. Can be adjusted to.
【００１４】そして、ロータリバルブ１４にはオリフィ
ス１５，１６間の周方向の位置で、且つ軸方向にずれた
位置に中間オリフィス１８が形成されているので、オリ
フィス１５を連通孔１７に対向させたミディアムの状態
からオリフィス１６を連通孔１７に対向させるソフトの
状態にするためにロータリバルブ１４を回転したとき、
その途中で中間オリフィス１８が連通孔１９に対向して
バイパス流路を開けるので、減衰力がハードの状態まで
高くなることがなくなる。即ち、減衰力は図４に示すよ
うに、ハードの状態からミディアムの状態にはスムーズ
に移行し、ミディアムの状態からソフトの状態に移行す
るときには若干減衰力が高くなることもあるが、極端に
高くなることなくソフトの状態に移行するので、乗心地
がよくなる。Since an intermediate orifice 18 is formed in the rotary valve 14 at a position in the circumferential direction between the orifices 15 and 16 and at a position shifted in the axial direction, the orifice 15 is opposed to the communication hole 17. When rotating the rotary valve 14 from the medium state to the soft state in which the orifice 16 faces the communication hole 17,
Since the intermediate orifice 18 opposes the communication hole 19 to open the bypass passage in the middle of the process, the damping force does not increase to a hard state. That is, as shown in FIG. 4, the damping force smoothly transitions from the hard state to the medium state, and the damping force may increase slightly when transitioning from the medium state to the soft state. The rider feels comfortable because it transitions to the soft state without increasing the height.
【００１５】しかも、中間オリフィス１８は減衰力調整
用のオリフィス１５，１６と周方向及び軸方向の異なる
位置に設けるので、加工の容易な円形オリフィスとする
こともできるとともに、ロータリバルブ１４の強度の低
下の度合いもくさび形状や長孔にする場合に比して極め
て少なくなる。Moreover, since the intermediate orifice 18 is provided at a position different from the damping force adjusting orifices 15 and 16 in the circumferential direction and the axial direction, it can be a circular orifice which can be easily machined, and the strength of the rotary valve 14 can be improved. The degree of decrease is extremely small as compared with the case of forming a wedge shape or a long hole.
【００１６】[0016]
【発明の効果】以上に説明したように本発明によれば、
ロータリバルブには複数の径の異なる減衰力調整用オリ
フィス間で、かつ減衰力調整用オリフィスとは軸方向に
ずれた位置に中間オリフィスを形成し、中空部材にはこ
の中間オリフィスに対応する連通孔を形成するので、ロ
ータリバルブの加工上及び強度上の不都合を生じること
なく、減衰力を小さくするように調整するときに極端に
減衰力が高くなる状態を抑制でき、乗心地が向上する。As described above, according to the present invention,
An intermediate orifice is formed in the rotary valve between a plurality of damping force adjusting orifices having different diameters and at a position axially displaced from the damping force adjusting orifice, and the hollow member has a communicating hole corresponding to the intermediate orifice. Therefore, it is possible to suppress a state where the damping force becomes extremely high when the damping force is adjusted to be small, without causing any inconvenience in processing and strength of the rotary valve, and ride comfort is improved.
【図１】本発明に係る減衰力調整機構を適用した油圧緩
衝器の要部断面図FIG. 1 is a sectional view of essential parts of a hydraulic shock absorber to which a damping force adjusting mechanism according to the present invention is applied.
【図２】図１のＡ−Ａ線に沿うロータリバルブの異なる
回転位置での断面図2 is a sectional view of the rotary valve at different rotational positions along the line AA in FIG.
【図３】図１のＢ−Ｂ線に沿うロータリバルブの異なる
回転位置での断面図3 is a cross-sectional view of the rotary valve at different rotational positions along line BB in FIG.
【図４】減衰力の変化を示す線図FIG. 4 is a diagram showing changes in damping force.
【図５】従来の減衰力調整機構を適用した油圧緩衝器の
要部断面図FIG. 5 is a sectional view of essential parts of a hydraulic shock absorber to which a conventional damping force adjusting mechanism is applied.
【図６】図５のＣ−Ｃ線に沿うロータリバルブの異なる
回転位置での断面図6 is a cross-sectional view of the rotary valve at different rotational positions taken along line CC of FIG.
【図７】図６の減衰力調整機構による減衰力の変化を示
す線図7 is a diagram showing changes in damping force by the damping force adjusting mechanism of FIG.
１…シリンダ、２…中空ロッド、３…ピストン、１４…
ロータリバルブ、１５…小径のオリフィス、１６…大径
のオリフィス、１７…連通孔、１８…中間オリフィス、
１９…連通孔。1 ... Cylinder, 2 ... Hollow rod, 3 ... Piston, 14 ...
Rotary valve, 15 ... Small diameter orifice, 16 ... Large diameter orifice, 17 ... Communication hole, 18 ... Intermediate orifice,
19 ... Communication hole.
Claims (1)
整用オリフィスが形成されたロータリバルブが回転自在
に装着され、前記中空部材に前記オリフィスに対応する
連通孔が形成され、この連通孔に対応するオリフィスを
変えることによって流路面積を変化させて減衰力を調整
するようにした油圧緩衝器の減衰力調整機構において、
前記ロータリバルブには前記複数の径の異なる減衰力調
整用オリフィス間で、かつ該減衰力調整用オリフィスと
は軸方向にずれた位置に中間オリフィスが形成され、前
記中空部材にはこの中間オリフィスに対応する連通孔が
形成されていることを特徴とする油圧緩衝器の減衰力調
整機構。1. A rotary valve in which a plurality of damping force adjusting orifices having different diameters are formed is rotatably mounted in a hollow member, and a communicating hole corresponding to the orifice is formed in the hollow member. In the damping force adjusting mechanism of the hydraulic shock absorber, which adjusts the damping force by changing the flow passage area by changing the orifice corresponding to
An intermediate orifice is formed in the rotary valve between the plurality of damping force adjusting orifices having different diameters, and at a position axially displaced from the damping force adjusting orifice. A damping force adjusting mechanism for a hydraulic shock absorber, in which corresponding communication holes are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24794593A JPH07103278A (en) | 1993-10-04 | 1993-10-04 | Damping force adjusting mechanism of hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24794593A JPH07103278A (en) | 1993-10-04 | 1993-10-04 | Damping force adjusting mechanism of hydraulic shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07103278A true JPH07103278A (en) | 1995-04-18 |
Family
ID=17170888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24794593A Pending JPH07103278A (en) | 1993-10-04 | 1993-10-04 | Damping force adjusting mechanism of hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018155448A1 (en) | 2017-02-27 | 2018-08-30 | 三井化学株式会社 | Method for producing laminate and co-extruded sheet |
-
1993
- 1993-10-04 JP JP24794593A patent/JPH07103278A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018155448A1 (en) | 2017-02-27 | 2018-08-30 | 三井化学株式会社 | Method for producing laminate and co-extruded sheet |
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Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020822 |