JPS62181986A - Steering shock absorber for motorcycle - Google Patents
Steering shock absorber for motorcycleInfo
- Publication number
- JPS62181986A JPS62181986A JP2288086A JP2288086A JPS62181986A JP S62181986 A JPS62181986 A JP S62181986A JP 2288086 A JP2288086 A JP 2288086A JP 2288086 A JP2288086 A JP 2288086A JP S62181986 A JPS62181986 A JP S62181986A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- shock absorber
- outer cylinder
- inner cylinder
- steering
- 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
- 239000006096 absorbing agent Substances 0.000 title claims description 14
- 230000035939 shock Effects 0.000 title claims description 14
- 238000013016 damping Methods 0.000 description 10
- 230000008602 contraction Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、自動二輪車のハンドルに発生する振動を防止
する操向緩衝器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a steering shock absorber that prevents vibrations generated in the handle of a motorcycle.
自動二輪車のハンドルには、車速か高速になるにつれ路
面から前輪を介して伝達される不規則な外乱が共振状態
になるとき、いわゆるシミーとよばれる振動になって現
れる場合がある。As the vehicle speed increases, irregular disturbances transmitted from the road surface through the front wheels reach a resonance state in the steering wheel of a motorcycle, and this may result in vibrations known as shimmy.
このようなシミーを防止するため、油を充填したシリン
ダをピストンで二つの油室に区分し、両油室の間をオリ
フィスで連通した緩衝器をハンドル等による操向機構と
車体フレームとの間に介在させるようにしたものがある
。（実公昭４８−５７７７号公報参照）
上述の操向緩衝器はピストンがシリンダ内を摺動し、そ
れによって油がオリフィスを絞られながら通過するとき
に発生する減衰力によってシミーを解消する。もし上記
ピストンで区分される油室に気泡が混入しており、その
気泡がオリフィスを通過するようなことがあると減衰力
は著しく低減し、安定した振動防止を行うことはできな
くなる。そのため、安定した減衰力を発生させるために
は、シリンダ内に油を満充填状態にし、気泡の混入がな
いようにしておかなければならない。In order to prevent such shimmy, a cylinder filled with oil is divided into two oil chambers by a piston, and a buffer with an orifice communicating between the two oil chambers is installed between the steering mechanism such as a handle and the vehicle body frame. There are some that are made to intervene. (Refer to Japanese Utility Model Publication No. 48-5777) The above-mentioned steering damper eliminates shimmy by the damping force generated when the piston slides in the cylinder and the oil passes through the orifice while being squeezed. If air bubbles are mixed into the oil chamber divided by the piston and the air bubbles pass through the orifice, the damping force will be significantly reduced and stable vibration prevention will no longer be possible. Therefore, in order to generate a stable damping force, the cylinder must be fully filled with oil to prevent air bubbles from entering.
ところが、このようにシリンダ内に油が満充填状態にな
っていると、操向緩衝器の作動によって油温が上昇して
油が熱膨張したとき、その体積増加をシリンダ内で吸収
できなくなり、シール部などから油漏れを起こすように
なる。しかし、油温が低下すると油の体積は再び元の状
態に戻って収縮するため、それによってシリンダ内に外
部から空気が抱き込まれ、これが上述のように減衰力を
不安定にする原因になっている。However, when the cylinder is fully filled with oil, when the oil temperature rises due to the operation of the steering shock absorber and the oil thermally expands, the increase in volume cannot be absorbed within the cylinder. Oil begins to leak from seals, etc. However, when the oil temperature drops, the oil volume returns to its original state and contracts, which causes air to be drawn into the cylinder from the outside, causing the damping force to become unstable as described above. ing.
本発明の目的は、上述のような従来の問題を解消し、長
期間安定した減衰力を発揮できるようにした自動二輪車
の操向緩衝器を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a steering shock absorber for a motorcycle that solves the above-mentioned conventional problems and is capable of exerting a stable damping force over a long period of time.
上記目的を達成する本発明は、ピストンにより区分され
た二つの油室をオリフィスを介して連ｊｍすると共に、
この両油室に油を満充填させた内筒を横置きし、この横
ｉ〃きの内筒の外側に気体空間を残すように油を充填さ
せた外筒で覆うたことを特徴とするものである。The present invention achieves the above object by connecting two oil chambers separated by a piston through an orifice, and
Both oil chambers are characterized in that an inner cylinder filled with oil is placed horizontally and covered with an outer cylinder filled with oil so as to leave a gas space outside the horizontal inner cylinder. It is something.
以下、本発明を図に示す実施例により説明する。 Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.
第６図および第７図は自動二輪車の操向装置部分を示す
もので、１は車体フレーム、２はその前端部のヘッド管
である。ヘッド管２には操向軸３が回動自在に挿入され
、その操向軸３の上下端に上ブラケット４と下ブラケッ
ト５が固定されている。上ブラケット４の上面にはハン
ドル６が取り付けられ、また上ブラケット４と下プラケ
ット５の左右両端にフロントフォーク７．７が固定され
、その下端に前輪８が支持されている。このような構成
により、ハンドル６の操作により前輪８を左右に操向で
きるようになっている。6 and 7 show the steering device portion of a motorcycle, where 1 is a body frame and 2 is a head tube at the front end thereof. A steering shaft 3 is rotatably inserted into the head tube 2, and an upper bracket 4 and a lower bracket 5 are fixed to the upper and lower ends of the steering shaft 3. A handle 6 is attached to the upper surface of the upper bracket 4, and front forks 7.7 are fixed to both left and right ends of the upper bracket 4 and the lower bracket 5, and a front wheel 8 is supported at the lower end thereof. With this configuration, the front wheels 8 can be steered left and right by operating the handle 6.
上述した操向機構の一部である下ブラケット５と車体フ
レーム１との間には、振動を緩衝するため後述する操向
緩衝器９が取り付けられている。A steering damper 9, which will be described later, is installed between the lower bracket 5, which is a part of the steering mechanism described above, and the vehicle body frame 1 in order to dampen vibrations.
第１図〜第３図は上記操向緩衝器９の詳細を示−し、１
０．１１はそれぞれ油を充填した横置きの内湾および外
筒である。前者の内筒１０には油が満充填状態に封入さ
れているのに対し、後者の外筒１１には気体空間１９ａ
を残した状態で油が充填されている。内筒１０にはピス
トン１２が摺動自在に挿入され、かつ両端にはピストン
軸１２ａを支持する軸受部１５．１５が装着されている
。1 to 3 show details of the above-mentioned steering shock absorber 9.
0.11 are horizontal inner and outer cylinders filled with oil. The former inner cylinder 10 is fully filled with oil, while the latter outer cylinder 11 has a gas space 19a.
The oil is filled with . A piston 12 is slidably inserted into the inner cylinder 10, and bearings 15.15 are mounted at both ends to support the piston shaft 12a.
軸受部１５はフランジ部１５ａを有し、このフランジ部
） ５ ａは同時に外筒１１の両端を閉塞する蓋板にな
っている。このフランジ部１５ａの軸心は、軸受部１５
本体の軸心と距離ｅだけ偏心し、この偏心によって内筒
１０の軸心が外筒１１の軸心に対し下方へ偏心した位置
関係になっている。このような偏心は、上述のようなフ
ランジ部１５ａの構成によらないで、第４図に示す実施
例のように外筒１１の端一部を偏心させて絞り、それを
内筒１０の外周面に密着固定する構成にしてもよい。ま
た、内筒１０と外筒１１とは上記実施例のように偏心配
置にした方が好ましいが、第５図の実施例のように同心
状に配置したものでもよい。The bearing portion 15 has a flange portion 15a, and this flange portion 5a serves as a cover plate that closes both ends of the outer cylinder 11 at the same time. The axis of this flange portion 15a is located at the bearing portion 15.
It is eccentric by a distance e from the axis of the main body, and due to this eccentricity, the axis of the inner cylinder 10 is eccentrically downward with respect to the axis of the outer cylinder 11. Such eccentricity is not caused by the configuration of the flange portion 15a as described above, but by eccentrically constricting a part of the end of the outer cylinder 11 as in the embodiment shown in FIG. It may be configured to be closely fixed to a surface. Further, although it is preferable that the inner cylinder 10 and the outer cylinder 11 be arranged eccentrically as in the above embodiment, they may be arranged concentrically as in the embodiment shown in FIG.
内筒１０の内部は上記ピストン１２によって二つの油室
１３．１３に区分され、両油室１３゜１３はピストン１
２に設けたオリフィス１４によって互いに連通している
。両端の軸受部１５゜１５にはそれぞれオイルシール１
６，１６が設けられ、ピストン軸１２ａとの隙間から油
漏れするのを防止している。また、オイルシール１６．
１６−の内側にはピストン軸１２ａを囲む環状溝１７．
１７が形成され、この環状溝１７゜１７にそれぞれ下向
きにした連通口１８．１８が接続され、外筒１１内の油
室１９に連通している。The inside of the inner cylinder 10 is divided into two oil chambers 13.13 by the piston 12, and both oil chambers 13.13 are connected to the piston 1.
They communicate with each other through an orifice 14 provided at 2. Oil seals 1 are installed in the bearing parts 15°15 at both ends.
6 and 16 are provided to prevent oil from leaking from the gap with the piston shaft 12a. Also, oil seal 16.
16- is an annular groove 17. which surrounds the piston shaft 12a.
17 is formed, and communication ports 18 and 18 facing downward are connected to the annular grooves 17 and 17, respectively, and communicate with an oil chamber 19 within the outer cylinder 11.
上述の操向緩衝器９は、外筒１１の外周面に取付部２０
を有し、この取付部２０を介して第７図に示すように下
ブラケツト５上のピン２１に枢支され、またピストン軸
１２ａの一端を車体フレーム１上のピン２２に枢支され
る。このような取付状態において、ハンドル６を左右に
操作すると、内筒１０内のピストン１２が摺動し、その
ときオリフィス１４を通過する油の流動抵抗により減衰
力を発生する。The above-mentioned steering shock absorber 9 has a mounting portion 20 on the outer peripheral surface of the outer cylinder 11.
As shown in FIG. 7, the piston shaft 12a is pivotally supported by a pin 21 on the lower bracket 5 via the mounting portion 20, and one end of the piston shaft 12a is pivotally supported by a pin 22 on the vehicle body frame 1. In this installed state, when the handle 6 is operated to the left or right, the piston 12 within the inner cylinder 10 slides, and at this time, a damping force is generated due to the flow resistance of the oil passing through the orifice 14.
上述の操向緩衝器９が作動によって油温か上昇すると、
油は熱膨張して体積を増加し、一部がピストン軸１２ａ
と軸受部１５との隙間から環状溝１７へ流れ、さらに連
通口１８を経て外筒１１の油室１９へ流出する。外筒１
１の油室１９は油が気体空間１９ａを残した状態で充填
されているので、油が流入してもこの圧縮性の気体空間
１９ａによって簡単に吸収することができる。したがっ
て、油圧の増大によって油漏れを起こすようなことはな
し、また熱収縮時の体積減少によって気泡を吸い込むこ
ともないため、長期間安定した減衰力を維持することが
できる。When the oil temperature rises due to the operation of the above-mentioned steering buffer 9,
The oil thermally expands and increases in volume, and a portion of the oil expands into the piston shaft 12a.
It flows into the annular groove 17 through the gap between the bearing part 15 and the bearing part 15, and further flows out into the oil chamber 19 of the outer cylinder 11 through the communication port 18. Outer cylinder 1
Since the first oil chamber 19 is filled with oil leaving a gas space 19a, even if oil flows in, it can be easily absorbed by this compressible gas space 19a. Therefore, oil leakage does not occur due to an increase in oil pressure, and air bubbles are not sucked in due to volume reduction during heat shrinkage, so a stable damping force can be maintained for a long period of time.
一方、車両は加減速時りこ車体が後傾、前傾の姿勢変化
し、この姿勢変化により外筒１１内の油室１９の油面Ｆ
も鎖線のＦ′のように傾斜する。しかし、この傾斜油面
Ｆ′が、連通孔１８の開口の下側になるまで大きく変化
すると、この連通孔１８からピストン軸１２ａと軸受部
１５との隙間を介して、内筒１０内の油室１３へ気体室
１９ａの空気を吸い込む場合がある。このように空気を
吸い込むと、その気泡のため前述したように安定した減
衰力を妨げるようになる。On the other hand, when the vehicle accelerates or decelerates, the vehicle body changes its posture by tilting backward or forward, and this change in posture causes the oil level F in the oil chamber 19 in the outer cylinder 11 to change.
It also slopes like the chain line F'. However, when this inclined oil level F' changes significantly to the point below the opening of the communication hole 18, the oil in the inner cylinder 10 flows from the communication hole 18 through the gap between the piston shaft 12a and the bearing part 15. Air in the gas chamber 19a may be sucked into the chamber 13. When air is sucked in in this way, the bubbles interfere with the stable damping force as described above.
しかし、上述した第１図、第４図、第５図に例示した実
施例では、いずれも連通孔１８を下向きにさせて油室１
９内に開口するようにしているから、傾斜油面Ｆ′が連
通孔１８の開口の下側にならない最大許容傾斜角αを可
及的に大きくすることができる。このように最大許容傾
斜角αが大きいことによって、車両の加減速時に気体室
１９ａが連通孔１０の開口に臨む頻度は少なくなり、安
定した減衰力を長期間にわたり発揮させることができる
。However, in the embodiments illustrated in FIG. 1, FIG. 4, and FIG.
9, the maximum permissible inclination angle α that prevents the inclined oil level F' from being below the opening of the communication hole 18 can be made as large as possible. Since the maximum allowable inclination angle α is large as described above, the gas chamber 19a faces the opening of the communication hole 10 less frequently when the vehicle accelerates or decelerates, and a stable damping force can be exerted over a long period of time.
また、この最大許容傾斜角αは、第１図や第４図の実施
例のように内筒１０の軸心を外筒１１の軸心より下側に
偏心した配置にすることによって一層大きくすることが
できる。すなわち１、第５図に示す実施例のように、内
筒１０と外筒１１とを同心状に配置したものでは、傾斜
油面Ｆ′が連通孔１８の下側に゛ならないようにする最
大許容傾斜角αが、上述した第１図や第４図の実施例に
おける偏心距離ｅに相当する分だけ小さくなるからであ
る。Further, this maximum allowable inclination angle α can be further increased by arranging the axis of the inner cylinder 10 eccentrically below the axis of the outer cylinder 11 as in the embodiments shown in FIGS. 1 and 4. be able to. In other words, when the inner cylinder 10 and the outer cylinder 11 are arranged concentrically as in the embodiment shown in FIGS. This is because the allowable inclination angle α is reduced by an amount corresponding to the eccentric distance e in the embodiments shown in FIGS. 1 and 4 described above.
また、上述のように傾斜油面Ｆ′の最大許容傾斜角αを
大きくするには、外筒１１の径を大きくしても達成でき
る。しかし、外筒１１の径を太き（するほど緩衝器全体
グ大型化するため、自動二輪車のように機器の配置スペ
ースに限界がある車両では不利であ蒸。Further, as described above, increasing the maximum permissible inclination angle α of the inclined oil surface F' can be achieved by increasing the diameter of the outer cylinder 11. However, the larger the diameter of the outer cylinder 11 (the larger the entire shock absorber becomes), which is disadvantageous in vehicles such as motorcycles where space for equipment is limited.
〔発明の効果〕
上述したように本発明は、ピストンにより区分された二
つの油室をオリフィスを介して連通ずると共に、この両
油室に油を満充填させた内筒を横置きし、この横置きの
内筒の外側に気体空間を残すように油を充填させた外筒
で覆う構成にしたものである。したがって、内筒の油室
内の油の熱膨張による体積増加を上記外筒内の崖縮性の
一体空間によって吸収することができ、それによって油
漏れや、また熱収縮時の気泡の吸い込みをなくし、宏量
した減衰力性能を長期間維持することができるようにす
る。[Effects of the Invention] As described above, the present invention communicates two oil chambers separated by a piston through an orifice, and horizontally places an inner cylinder filled with oil in both oil chambers. The structure is such that an inner cylinder placed horizontally is covered with an outer cylinder filled with oil so as to leave a gas space on the outside. Therefore, the increase in volume due to thermal expansion of the oil in the oil chamber of the inner cylinder can be absorbed by the integral space with shrinkage properties in the outer cylinder, thereby eliminating oil leakage and the suction of air bubbles during thermal contraction. , it is possible to maintain increased damping force performance for a long period of time.
第１図は本発明の実施例による操向緩衝器の縦断面図、
第２図は第１図のｎ−ｎ矢視図、第３図は同じく第１図
の■−■矢視図、第４図は本発明の他の実施例による操
向緩衝器の縦断面図、第５図は本発明のさらに他の実施
例による操向緩衝器の縦断面図、第６図は自動二輪車の
操向機構の部分を示す側面図、第７図は同自動二輪車の
操向機構部分の要部を示す側面図である。
９−・・−操向緩衝器、 １０・−・内筒、 １１
−・−外筒、 １２・−ピストン、 １２ａ−・・
ピストン軸、１３ 、 １９−＝−油室、 １９ａ−
気体空間、 １４−オ、リフイス、 １５・・−軸
受部、 １７・−・環・状溝、’１８一連通口。FIG. 1 is a longitudinal sectional view of a steering shock absorber according to an embodiment of the present invention;
FIG. 2 is a view taken along the nn arrow in FIG. 1, FIG. 3 is a view taken along the ■-■ arrow in FIG. 1, and FIG. 4 is a longitudinal section of a steering shock absorber according to another embodiment of the present invention. 5 is a longitudinal sectional view of a steering shock absorber according to still another embodiment of the present invention, FIG. 6 is a side view showing a portion of the steering mechanism of the motorcycle, and FIG. FIG. 9--Steering shock absorber, 10--Inner cylinder, 11
-・-Outer cylinder, 12・-Piston, 12a-・
Piston shaft, 13, 19-=-oil chamber, 19a-
Gas space, 14-O, refit, 15...-Bearing section, 17--Annular groove, '18 Series of ports.
Claims (3)
スを介して連通すると共に、この両油室に油を満充填さ
せた内筒を横置きし、この横置きの内筒の外側に気体空
間を残すように油を充填させた外筒で覆ったことを特徴
とする自動二輪車の操向緩衝器。(1) Two oil chambers separated by a piston are communicated via an orifice, and an inner cylinder filled with oil is placed horizontally in both oil chambers, and a gas space is created outside the horizontally placed inner cylinder. A steering shock absorber for a motorcycle, characterized in that it is covered with an outer cylinder filled with oil so as to leave an oil residue.
た特許請求の範囲第１項記載の自動二輪車の操向緩衝器
。(2) The steering shock absorber for a motorcycle according to claim 1, wherein the axis of the inner cylinder is eccentrically arranged below the axis of the outer cylinder.
て外筒内の油室に開口させた特許請求の範囲第１項また
は第２項記載の自動二輪車の操向緩衝器。(3) The steering shock absorber for a motorcycle according to claim 1 or 2, wherein the communication port provided in the bearing portion of the piston shaft opens downward into the oil chamber in the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2288086A JPS62181986A (en) | 1986-02-06 | 1986-02-06 | Steering shock absorber for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2288086A JPS62181986A (en) | 1986-02-06 | 1986-02-06 | Steering shock absorber for motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62181986A true JPS62181986A (en) | 1987-08-10 |
Family
ID=12095003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2288086A Pending JPS62181986A (en) | 1986-02-06 | 1986-02-06 | Steering shock absorber for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62181986A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62289492A (en) * | 1986-06-09 | 1987-12-16 | 澤井 徳松 | Travelling stabilizer for bicycle |
| JPH01158290U (en) * | 1988-04-19 | 1989-11-01 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60179539A (en) * | 1984-02-28 | 1985-09-13 | Atsugi Motor Parts Co Ltd | Hydraulic damper |
-
1986
- 1986-02-06 JP JP2288086A patent/JPS62181986A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60179539A (en) * | 1984-02-28 | 1985-09-13 | Atsugi Motor Parts Co Ltd | Hydraulic damper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62289492A (en) * | 1986-06-09 | 1987-12-16 | 澤井 徳松 | Travelling stabilizer for bicycle |
| JPH01158290U (en) * | 1988-04-19 | 1989-11-01 |
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