JPS604032B2 - Front forks of motorcycles, etc. - Google Patents
Front forks of motorcycles, etc.Info
- Publication number
- JPS604032B2 JPS604032B2 JP11107680A JP11107680A JPS604032B2 JP S604032 B2 JPS604032 B2 JP S604032B2 JP 11107680 A JP11107680 A JP 11107680A JP 11107680 A JP11107680 A JP 11107680A JP S604032 B2 JPS604032 B2 JP S604032B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- piston
- fork
- oil
- bottom case
- 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.)
- Expired
Links
Landscapes
- Axle Suspensions And Sidecars For Cycles (AREA)
- Fluid-Damping Devices (AREA)
Description
【発明の詳細な説明】
二輪車等が高速度で走行中に急ブレーキをかけよと、搭
乗者の慣性でハンドルに極めて大きい荷重が加わるため
に、これが著しく沈み込んで操縦怪が損われて危険であ
る。[Detailed Description of the Invention] When a two-wheeled vehicle, etc. is running at high speed and suddenly brakes, an extremely large load is applied to the handlebars due to the inertia of the rider, which causes the handlebars to sink significantly, impairing controllability, which is dangerous. It is.
この現象を除くために従来はボトムケースの側部にブレ
ーキと連動する弁室を形成していたが、フオークの礎造
が極めて複雑になる欠点があった。本発明はこの欠点を
除去すると共に特性を簡易に調整することのできるフロ
ントフオークを提供するものである。第１図は本発明実
施例の縦断面図で、ボトムケース１にフオークパィプ２
の下部を摺動自在に按合してそれらの内部に油３を充填
し、ボトムケース１の底部に楯設したシートパイプ４の
上端におけるピストン５をフオークバィプ２の内側に摺
動自在に鉄合して、上記ピストン５とパイプ２の上部と
の間に車体懸架ばね６を張架してある。In order to eliminate this phenomenon, a valve chamber linked to the brake was conventionally formed on the side of the bottom case, but this had the disadvantage of making the foundation of the fork extremely complicated. The present invention eliminates this drawback and provides a front fork whose characteristics can be easily adjusted. FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, in which a bottom case 1 has a fork pipe 2.
The lower parts of the fork vip 2 are slidably fitted together, oil 3 is filled inside them, and the piston 5 at the upper end of the sheet pipe 4 shielded at the bottom of the bottom case 1 is slidably fitted inside the fork vip 2. A vehicle body suspension spring 6 is stretched between the piston 5 and the upper part of the pipe 2.
またボトムケース１の上端にはオイルシール７を設け、
フオークパイプ２の下端には該パイプの下降時に開放し
て上昇時に閉じる逆止弁８を形成し、かつシートパイプ
４の上部並びに下部にそれぞれオリフィス９と比較的大
きい油孔１０とを設けてある。またシートパイプ４の内
部に操作杵１１を配置して、その上端に取付けた弁１２
をピストンの油孔１３に対設し、弁１２とピストン５と
の間にばね１４を鞭架してある。この操作村１１の下端
を、０リング１５を介して外部に引き出し、可摸索１６
に連結してある。更にボトムケース１の下部に円筒状の
補助油室１７を連結して、０リング１８を有するフリー
ピストン１９を該油室に俵合し、その背後に高圧の気体
２０を封入すると共にこの高圧気体の圧力でフリーピス
トン１９が常時圧嬢するストツパ２１を設けてある。な
お高圧気体室には更に０リング２２を有するピストン２
３を競合して、このピストンを調節ねじ２４に庄接かせ
てある。上述のフロントフオークにおけるボトムケース
１を二論者等の前輪の軸に結着してフオークパィプ２に
車体の前部を懸架し、かつ可榛索１６をブレーキレバー
に連結するもので、弁１２は常時開放している。In addition, an oil seal 7 is provided at the upper end of the bottom case 1.
A check valve 8 is formed at the lower end of the fork pipe 2, which opens when the pipe descends and closes when it rises, and an orifice 9 and a relatively large oil hole 10 are provided at the upper and lower parts of the seat pipe 4, respectively. . Further, an operating punch 11 is arranged inside the seat pipe 4, and a valve 12 is attached to the upper end of the operating punch 11.
is provided opposite to the oil hole 13 of the piston, and a spring 14 is suspended between the valve 12 and the piston 5. The lower end of this operation village 11 is pulled out to the outside via the O-ring 15, and the movable cable 16
It is connected to. Further, a cylindrical auxiliary oil chamber 17 is connected to the lower part of the bottom case 1, a free piston 19 having an O-ring 18 is fitted into the oil chamber, and a high-pressure gas 20 is sealed behind it, and this high-pressure gas is A stopper 21 is provided which keeps the free piston 19 under constant pressure. The high-pressure gas chamber further includes a piston 2 having an O-ring 22.
3, and this piston is brought into contact with the adjusting screw 24. The bottom case 1 of the above-mentioned front fork is connected to the shaft of the front wheel, the front part of the vehicle body is suspended on the fork pipe 2, and the flexible cable 16 is connected to the brake lever, and the valve 12 is always connected. It's open.
この状態で二輪車等が走行し、路面から受ける衝撃でフ
オークパィブ２が下降すると逆止弁８が開いて、この弁
の下部の油が容易に上部へ流入し、またパイプ２の下部
の油は油孔１０および１３を通ってピストンの上部へ流
出するから比較的小さい減衰力が発生するだけで、パイ
プ２は容易に下降する。次にばね６の力でパイプ２が上
昇しようとすると、逆止弁８が閉じるから、その上部の
油がオリフィス９を流通して大きな減衰力が発生する。
かっこの状態ではフリーピストン１９がストッパ２１に
圧接して、油３およびその油面上の空気には圧力が加わ
っていないから、フオークパィプ２の下降距離Ｌと反力
Ｐの関係は懸架ばね６の特性のみによって定まり、例え
ば第２図における曲線Ａのように表わされる。しかしブ
レーキが掛けられると、可摸索１６を介して操作村１１
が上方へ駆動されるから、弁１２がピストン５の下面に
圧接して油孔１３が閉じる。When a motorcycle or the like travels in this state and the fork pipe 2 descends due to the impact received from the road surface, the check valve 8 opens, and the oil at the bottom of this valve easily flows into the top, and the oil at the bottom of the pipe 2 becomes oily. The pipe 2 easily descends, with only a relatively small damping force being generated as it flows through the holes 10 and 13 to the top of the piston. Next, when the pipe 2 attempts to rise due to the force of the spring 6, the check valve 8 closes, and the oil above it flows through the orifice 9, generating a large damping force.
In the parenthesized state, the free piston 19 is in pressure contact with the stopper 21, and no pressure is applied to the oil 3 or the air on the oil surface. Therefore, the relationship between the downward distance L of the fork pipe 2 and the reaction force P of the suspension spring 6 It is determined only by the characteristics, and is expressed as, for example, curve A in FIG. However, when the brake is applied, the control panel 11 is connected via the movable cable 16.
is driven upward, the valve 12 comes into pressure contact with the lower surface of the piston 5 and the oil hole 13 is closed.
従って搭乗者の慣性でフオークパィプ２に大きな荷重が
加わって、これが下降しようとすると、ピストン５の下
部の油圧が上昇して、その油圧でフリーピストン１９が
上昇し高圧気体２０が圧縮される。すなわち気体２０の
圧力をＰ，とするとフオークパィプ２の下降距離Ｌと反
力Ｐの関係は気体２０１こよる空気ばねと懸架ばね６と
の和によって例えば曲線Ｂのように表わされる。このよ
うに本発明のフロントフオークは、ブレーキがかけられ
るとフオークパィプに加わる反力が急激に増大して、そ
の圧縮が阻止される。従って高速度で走行中に急ブレー
キをかけた場合におけるハンドルの沈み込みが防止され
て操縦の安定性が保たれる。かっこの状態で路面から更
に強に衝撃を受けた場合等は前記曲線Ｂに沿って、パイ
プ２が下降するからその衝撃を緩和することもできる。
またねじ２４を調節して高圧気体２０の圧力をｐ２，ｐ
３に設定すると曲線Ｃ，Ｄのような特性となるから、簡
易に所望の特性を得ることができる。Therefore, when a large load is applied to the fork pipe 2 due to the inertia of the passenger and it tries to descend, the oil pressure at the lower part of the piston 5 increases, and the free piston 19 moves up by the oil pressure, compressing the high-pressure gas 20. That is, assuming that the pressure of the gas 20 is P, the relationship between the downward distance L of the fork pipe 2 and the reaction force P is expressed as, for example, a curve B by the sum of the air spring caused by the gas 201 and the suspension spring 6. As described above, in the front fork of the present invention, when the brake is applied, the reaction force applied to the fork pipe increases rapidly, and its compression is prevented. This prevents the steering wheel from sinking when the brakes are suddenly applied while driving at high speeds, thereby maintaining stability in steering. If the pipe 2 receives a stronger impact from the road surface in the braced state, the pipe 2 descends along the curve B, so that the impact can be alleviated.
Also, adjust the screw 24 to adjust the pressure of the high pressure gas 20 to p2, p.
If it is set to 3, the characteristics will be as shown by curves C and D, so the desired characteristics can be easily obtained.
第１図は本発明実施例の縦断面図、第２図は本発明のフ
ロントフオークの特性曲線である。
なお図において、１はボトムケース、２はフオークパイ
プ、３は油、４はシートパイプ、５はピストン、８は逆
止弁、１１は操作村、１２は弁、１３は油孔、１６は可
摸索、１７は補助油室、１９はフリーピストン、２川ま
高圧気体である。次／濁
次ｚ虜FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a characteristic curve of the front fork of the present invention. In the figure, 1 is the bottom case, 2 is the fork pipe, 3 is the oil, 4 is the seat pipe, 5 is the piston, 8 is the check valve, 11 is the operation port, 12 is the valve, 13 is the oil hole, and 16 is the oil hole. 17 is an auxiliary oil chamber, 19 is a free piston, and 2 rivers are high pressure gas. Next/Dokuji Z Captive
Claims (1)
嵌合してそれらの内部に油を充填し、上記ボトムケース
の底部に植設したシートパイプの上端に形成したピスト
ンを前記フオークパイプの内側に摺動自在に嵌合して、
上記シートパイプ中に二輪車等のブレーキレバーと連動
する操作杆を配置し、ブレーキが掛けられたとき前記ピ
ストンの油孔が閉じるよう該操作杆の先端に形成した弁
を該油孔に対設すると共に、前記ボトムケースの下部に
連結した補助油室にフリーピストンを嵌合して上記フリ
ーピストンの背後に高圧気体を圧力調節可能に封入し、
かつ上記フリーピストンが高圧気体の圧力で圧接するス
トツパを設けたことを特徴とする二輪車等のフロントフ
オーク。1. The lower part of the fork pipe is slidably fitted into the bottom case, the inside of the fork pipe is filled with oil, and the piston formed at the upper end of the sheet pipe installed in the bottom of the bottom case is inserted inside the fork pipe. Slidably fit together.
An operating lever that interlocks with a brake lever of a motorcycle or the like is disposed in the seat pipe, and a valve formed at the tip of the operating lever is provided opposite to the oil hole so that the oil hole of the piston closes when the brake is applied. At the same time, a free piston is fitted into an auxiliary oil chamber connected to the lower part of the bottom case, and high pressure gas is sealed behind the free piston so that the pressure can be adjusted;
A front fork for a two-wheeled vehicle, etc., further comprising a stopper which the free piston comes into contact with under pressure of high-pressure gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107680A JPS604032B2 (en) | 1980-08-14 | 1980-08-14 | Front forks of motorcycles, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11107680A JPS604032B2 (en) | 1980-08-14 | 1980-08-14 | Front forks of motorcycles, etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5737081A JPS5737081A (en) | 1982-03-01 |
| JPS604032B2 true JPS604032B2 (en) | 1985-02-01 |
Family
ID=14551768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11107680A Expired JPS604032B2 (en) | 1980-08-14 | 1980-08-14 | Front forks of motorcycles, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS604032B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63159929U (en) * | 1987-04-08 | 1988-10-19 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131707A (en) * | 1983-12-19 | 1985-07-13 | 株式会社村田製作所 | Nonreduced temperature compensating dielectric porcelain composition |
| US5242225A (en) * | 1990-06-11 | 1993-09-07 | Murata Manufacturing Co., Ltd. | Temperature sensor |
| JPH0833327B2 (en) * | 1990-06-11 | 1996-03-29 | 株式会社村田製作所 | Temperature sensor |
| JP4403705B2 (en) | 2003-02-17 | 2010-01-27 | Ｔｄｋ株式会社 | Dielectric porcelain composition and electronic component |
-
1980
- 1980-08-14 JP JP11107680A patent/JPS604032B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63159929U (en) * | 1987-04-08 | 1988-10-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5737081A (en) | 1982-03-01 |
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