JPH0514025Y2 - - Google Patents
Info
- Publication number
- JPH0514025Y2 JPH0514025Y2 JP1985149757U JP14975785U JPH0514025Y2 JP H0514025 Y2 JPH0514025 Y2 JP H0514025Y2 JP 1985149757 U JP1985149757 U JP 1985149757U JP 14975785 U JP14975785 U JP 14975785U JP H0514025 Y2 JPH0514025 Y2 JP H0514025Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring seat
- damper
- inner tube
- front fork
- cylinder
- 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 - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 15
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 238000013016 damping Methods 0.000 description 11
- 230000001419 dependent effect Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Axle Suspensions And Sidecars For Cycles (AREA)
- Fluid-Damping Devices (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は二輪車の前輪車軸と車体間に介装さ
れ、路面からの振動等の入力を減衰させる油圧緩
衝器たるダンパー内蔵式のフロントフオークに関
する。[Detailed description of the invention] [Field of industrial application] The present invention relates to a front fork with a built-in damper, which is a hydraulic shock absorber that is interposed between the front axle of a two-wheeled vehicle and the vehicle body and dampens input such as vibrations from the road surface. .
オートバイ等の二輪車では、前輪側と車体側間
に路面からの振動、衝撃等の入力を減衰させる油
圧緩衝器たるフロントフオークを介装している。
In two-wheeled vehicles such as motorcycles, a front fork, which serves as a hydraulic shock absorber, is installed between the front wheel and the vehicle body to dampen inputs such as vibrations and shocks from the road surface.
一般的なフロントフオークは、アウターチユー
ブ内にピストン部を介してインナーチユーブを摺
動自在に挿入させ、アウターチユーブの内部中央
には中空シリンダを起立させ、この中空シリンダ
の上部ピストン部をインナーチユーブ内周に摺接
させ、中空シリンダ内にはインナーチユーブ圧縮
時にストローク後半での運動エネルギーを吸収
し、底付き等を防止するストローク依存の圧側減
衰力発生装置が設けられている。 In a typical front fork, an inner tube is slidably inserted into an outer tube via a piston, a hollow cylinder is erected in the center of the outer tube, and the upper piston of this hollow cylinder is inserted into the inner tube. A stroke-dependent compression side damping force generating device is installed in the hollow cylinder in sliding contact with the circumference and absorbs kinetic energy in the latter half of the stroke when the inner tube is compressed to prevent bottoming out.
一方、他の型式のフロントフオークとしては、
アウターチユーブ内にインナーチユーブを摺動自
在に挿入し、アウターチユーブの内部中央にダン
パーを内蔵させ、このダンパーのピストンロツド
をインナーチユーブと連動させたものが知られて
いる。 On the other hand, as for other types of front forks,
It is known that an inner tube is slidably inserted into an outer tube, a damper is built in the center of the inner tube, and a piston rod of the damper is linked with the inner tube.
ところが、上記ダンパー内蔵式フロントフオー
クでは、アウターチユーブ内にダンパーが組み込
まれており、スペース的にも上記一般のフロント
フオークと同じようなストローク依存の圧側減衰
力発生装置が適用できない。
However, in the above-mentioned front fork with a built-in damper, the damper is built into the outer tube, and a stroke-dependent compression side damping force generating device like the above-mentioned general front fork cannot be applied due to space considerations.
そこで、本考案の目的はストローク依存の圧側
減衰力発生装置を組み込み、ストローク後半での
運動エネルギーを吸収し、底付き等を防止できる
ダンパー内蔵式フロントフオークを提供すること
である。 Therefore, an object of the present invention is to provide a front fork with a built-in damper that incorporates a stroke-dependent compression side damping force generator, absorbs kinetic energy in the latter half of the stroke, and can prevent bottoming out.
上記の目的を達成するため、本考案の構成は、
アウターチユーブ内にインナーチユーブを摺動自
在に挿入させ、アウターチユーブの内部中央にダ
ンパーシリンダを起立させ、ダンパーシリンダ内
にピストンを介して摺動自在に挿入したピストン
ロツドをインナーチユーブに連結したフロントフ
オークに於て、ダンパーシリンダの上部に筒体か
らなるスプリングシートを保持させ、当該スプリ
ングシートはインナーシリンダ内に上部油留室と
下部圧力室を区画すると共に胴部に穿つた通孔を
介して油留室と圧力室を通じさせ、スプリングシ
ートの内周には上下スライド自在に通孔を開閉す
る筒体からなる開閉部材の外周を当接し、当該開
閉部材とインナーチユーブとの間に懸架スプリン
グを介装し、同じく開閉部材とスプリングシート
間に検知スプリングを介装したことを特徴とする
ものである。
In order to achieve the above purpose, the configuration of the present invention is as follows:
The inner tube is slidably inserted into the outer tube, the damper cylinder is erected in the center of the inner tube, and the piston rod, which is slidably inserted into the damper cylinder via the piston, is connected to the front fork connected to the inner tube. A cylindrical spring seat is held in the upper part of the damper cylinder, and the spring seat partitions an upper oil reservoir chamber and a lower pressure chamber in the inner cylinder, and also supplies oil reservoir through a hole bored in the body. The inner circumference of the spring seat is brought into contact with the outer periphery of an opening/closing member made of a cylinder that can freely slide up and down to open and close the through hole, and a suspension spring is interposed between the opening/closing member and the inner tube. However, it is also characterized in that a detection spring is interposed between the opening/closing member and the spring seat.
〔作用〕
最圧縮時近傍で検知スプリングに抗して開閉部
材が下降し、通孔を徐々に絞つて減衰力を発生さ
せる。[Operation] Near the maximum compression, the opening/closing member descends against the detection spring, gradually narrowing the through hole and generating a damping force.
以下本考案の実施の一例を図面について説明す
る。
An example of implementing the present invention will be described below with reference to the drawings.
アウターチユーブ１内にシール部材５を介して
インナーチユーブ２が摺動自在に挿入され、アウ
ターチユーブ１の中央下端にダンパーシリンダ３
を起立させ、ダンパーシリンダ３内にピストンを
介して摺動自在に挿入したピストンロツド４の基
端はインナーチユーブ２の上端に固定されてい
る。 An inner tube 2 is slidably inserted into the outer tube 1 via a seal member 5, and a damper cylinder 3 is installed at the lower center end of the outer tube 1.
The proximal end of the piston rod 4, which is erected and slidably inserted into the damper cylinder 3 via a piston, is fixed to the upper end of the inner tube 2.
ダンパーシリンダ３の上端には筒体状のスプリ
ングシート６が保持されている。このスプリング
シート６はねじ結合部７と、内周に設けたフラン
ジ状のストツパ１１と、上部のピストン部８と、
半径方向に穿つた通孔１０とを有し、ねじ結合部
７はダンパーシリンダ３の外周に螺合され、スト
ツパ１１はピストンロツド４を案内するダンパー
シリンダ３内のベアリング１２を保持し、ピスト
ン部８の外周にはシールリング９が嵌合し、この
シールリング９を介してピストン部８がインナー
チユーブ２の内周に摺接すると共にインナーチユ
ーブ２内に上部油溜室１３と下部圧力室１４を区
画し、通孔１０はこれら油溜室１３と圧力室１４
を通じさせている。 A cylindrical spring seat 6 is held at the upper end of the damper cylinder 3. This spring seat 6 includes a screw joint 7, a flange-shaped stopper 11 provided on the inner periphery, and an upper piston portion 8.
The screw joint 7 is screwed onto the outer periphery of the damper cylinder 3, and the stopper 11 holds a bearing 12 in the damper cylinder 3 that guides the piston rod 4. A seal ring 9 is fitted to the outer circumference of the inner tube 2, and the piston portion 8 slides on the inner circumference of the inner tube 2 through the seal ring 9, and an upper oil reservoir chamber 13 and a lower pressure chamber 14 are defined within the inner tube 2. However, the through hole 10 connects these oil reservoir chamber 13 and pressure chamber 14.
I am letting you know.
油溜室１３と圧力室１４内には作動油が充満
し、油留室１３の上方には気体室１５が設けられ
ている。 The oil reservoir chamber 13 and the pressure chamber 14 are filled with hydraulic oil, and a gas chamber 15 is provided above the oil reservoir chamber 13.
ダンパーシリンダ３内には伸側減衰力発生用の
バルブ機構を組み込んだピストンを介して上部油
室１６と下部油室が区画され、下部油室はダンパ
ーシリンダ３の下部に形成した油孔を介して圧力
室１４に通じさせ、下部油室内には圧側減衰力発
生機構が組み込まれている。 The damper cylinder 3 is divided into an upper oil chamber 16 and a lower oil chamber via a piston incorporating a valve mechanism for generating rebound damping force, and the lower oil chamber is separated through an oil hole formed at the bottom of the damper cylinder 3. The lower oil chamber communicates with the pressure chamber 14, and a compression side damping force generation mechanism is incorporated in the lower oil chamber.
ピストンロツド４内には外部から調整可能な操
作ロツド１７が挿入され、操作ロツド１７を上下
方向又は回転方向に移動することによりピストン
内のバルブ機構を調節するようになつている。 An externally adjustable operating rod 17 is inserted into the piston rod 4, and by moving the operating rod 17 in the vertical or rotational direction, the valve mechanism within the piston is adjusted.
ストツパを兼ねたスプリングシート６の内周に
は上下スライド自在に筒体状の開閉部材１８を当
接させ、この開閉部材１８は筒体１９と上部シー
ト面２０とを有し、当該シート面２０とインナー
チユーブ２の上部に設けたスプリングシート間に
懸架スプリング２１が介装され、同じくシート面
２０とストツパを兼ねたスプリングシート６のピ
ストン部８との間に検知スプリング２２が介装さ
れている。検知スプリング２２は開閉部材１８を
押し上げ、通常この開閉部材１８は通孔１０を開
口させているが、インナーチユーブ２の最圧縮時
近傍では検知スプリング２２に抗して開閉部材１
８が徐々に通孔１０を閉じる。 A cylindrical opening/closing member 18 is brought into contact with the inner periphery of the spring seat 6, which also serves as a stopper, and can be slid up and down. A suspension spring 21 is interposed between the spring seat and the spring seat provided at the upper part of the inner tube 2, and a detection spring 22 is also interposed between the seat surface 20 and the piston portion 8 of the spring seat 6 which also serves as a stopper. . The detection spring 22 pushes up the opening/closing member 18, and normally this opening/closing member 18 opens the through hole 10, but near the time when the inner tube 2 is at its maximum compression, the opening/closing member 1 pushes up against the detection spring 22.
8 gradually closes the through hole 10.
懸架スプリング２１と検知スプリング２２は常
時協働してインナーチユーブ２を伸長方向に附勢
している。 The suspension spring 21 and the detection spring 22 always cooperate to urge the inner tube 2 in the direction of extension.
次に作動について述べる。 Next, we will discuss the operation.
インナーチユーブ２の伸縮作動時には、伸側減
衰力と圧側減衰力がダンパー内のバルブ機構で発
生する。 When the inner tube 2 expands and contracts, a rebound damping force and a compression damping force are generated by a valve mechanism within the damper.
一方、圧縮作動に於て、インナーチユーブ２の
最圧縮近傍では、インナーチユーブ２とピストン
ロツド４の侵入体積分の作動油が高い圧力である
圧力室１４から通孔１０を介して油留室１３に流
出するが、この時インナーチユーブ２の圧縮スト
ロークに依存して懸架スプリング２１と検知スプ
リング２２が圧縮し、検知スプリング２２の圧縮
ストローク分開閉部材１８が下降し、筒体１９が
徐々に通孔１０を絞り、この絞り抵抗により徐々
に大きな減衰力が発生する。この為最圧縮近傍の
ストローク後半ではこの減衰力によりインナーチ
ユーブ２が急激に底付きせず、二輪車の乗心地が
良くなつた。 On the other hand, in the compression operation, near the maximum compression of the inner tube 2, the hydraulic oil corresponding to the intrusion volume of the inner tube 2 and the piston rod 4 flows from the high pressure pressure chamber 14 through the through hole 10 to the oil reservoir chamber 13. However, at this time, the suspension spring 21 and the detection spring 22 are compressed depending on the compression stroke of the inner tube 2, the opening/closing member 18 is lowered by the compression stroke of the detection spring 22, and the cylindrical body 19 gradually closes the through hole 10. is throttled, and this throttle resistance gradually generates a larger damping force. Therefore, in the latter half of the stroke near maximum compression, this damping force prevents the inner tube 2 from bottoming out suddenly, improving the riding comfort of the two-wheeled vehicle.
以上のように本考案によれば、最圧縮時近傍に
おいて、圧力室から油溜室に流出する作動油の流
れを徐々に絞るためストローク後半での運動エネ
ルギーの吸収が容易となり、急激なインナーチユ
ーブやピストンロツドの底付きが防止され、初期
の当りの柔かさが操作できる。この減衰力発生装
置はダンパーシリンダの上部に設けられているた
めにダンパー内蔵式でも適用できることになる。
As described above, according to the present invention, since the flow of hydraulic oil flowing out from the pressure chamber to the oil reservoir chamber is gradually constricted near the time of maximum compression, kinetic energy can be easily absorbed in the latter half of the stroke, and the sudden increase in the inner tube This prevents the piston rod from bottoming out and allows you to control the softness of the initial hit. Since this damping force generating device is provided at the upper part of the damper cylinder, it can also be applied to a damper built-in type.
更に通孔の開閉部材が筒体で構成され、この開
閉部材の外周が筒体からなるスプリングシートの
内周に上下スライド自在に当接しているから圧縮
時に圧力室からの圧力が開閉部材を押し上げる方
向にはほとんど作用せず、従つて開閉部材はスム
ースに通孔を徐々に絞ることができる。 Furthermore, the opening/closing member of the through hole is composed of a cylindrical body, and the outer periphery of this opening/closing member contacts the inner periphery of the spring seat made of the cylindrical body so that it can slide up and down, so that the pressure from the pressure chamber pushes up the opening/closing member during compression. The opening/closing member can smoothly narrow the through hole gradually.
添附図面は本考案の実施の一例に係るダンパー
内蔵式フロントフオークの一部縦断正面図であ
る。
１……アウターチユーブ、２……インナーチユ
ーブ、３……ダンパーシリンダ、４……ピストン
ロツド、６……スプリングシート、１０……通
孔、１３……油溜室、１４……圧力室、１８……
開閉部材、２１……懸架スプリング、２２……検
知スプリング。
The accompanying drawing is a partially longitudinal sectional front view of a front fork with a built-in damper according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Outer tube, 2... Inner tube, 3... Damper cylinder, 4... Piston rod, 6... Spring seat, 10... Through hole, 13... Oil reservoir chamber, 14... Pressure chamber, 18... …
Opening/closing member, 21... Suspension spring, 22... Detection spring.
Claims (1)
動自在に挿入させ、アウターチユーブの内部中
央にダンパーシリンダを起立させ、ダンパーシ
リンダ内にピストンを介して摺動自在に挿入し
たピストンロツドをインナーチユーブに連結し
たフロントフオークに於て、ダンパーシリンダ
の上部に筒体からなるスプリングシートを保持
させ、当該スプリングシートはインナーシリン
ダ内に上部油留室と下部圧力室を区画すると共
に胴部に穿つた通孔を介して油留室と圧力室を
通じさせ、スプリングシートの内周には上下ス
ライド自在に通孔を開閉する筒体からなる開閉
部材の外周を当接し、当該開閉部材とインナー
チユーブとの間に懸架スプリングを介装し、同
じく開閉部材とスプリングシート間に検知スプ
リングを介装したダンパー内蔵式フロントフオ
ーク。 (2) スプリングシートがダンパーシリンダ内のベ
アリングストツパを兼ねている実用新案登録請
求の範囲第１項記載のダンパー内蔵式フロント
フオーク。 (3) スプリングシートの外周にインナーチユーブ
と摺接するシールリングが介装されている実用
新案登録請求の範囲第１項記載のダンパー内蔵
式フロントフオーク。 (4) 通孔の開閉部材が上端にシート面を形成して
いる実用新案登録請求の範囲第１項記載のダン
パー内蔵式フロントフオーク。[Scope of Claim for Utility Model Registration] (1) An inner tube is slidably inserted into an outer tube, a damper cylinder is erected in the center of the outer tube, and a piston is slidably inserted into the damper cylinder. In the front fork that connects the piston rod to the inner tube, a cylindrical spring seat is held in the upper part of the damper cylinder, and the spring seat partitions the upper oil reservoir chamber and lower pressure chamber in the inner cylinder, and also The oil retention chamber and the pressure chamber are communicated through a through hole in the spring seat, and the outer periphery of an opening/closing member consisting of a cylinder that can slide up and down to open and close the through hole is brought into contact with the inner periphery of the spring seat. A front fork with a built-in damper has a suspension spring interposed between the inner tube and a detection spring between the opening/closing member and the spring seat. (2) The front fork with a built-in damper according to claim 1, wherein the spring seat also serves as a bearing stopper in the damper cylinder. (3) The front fork with a built-in damper according to claim 1, wherein a seal ring that slides into contact with the inner tube is interposed on the outer periphery of the spring seat. (4) A front fork with a built-in damper according to claim 1, wherein the opening/closing member of the through hole forms a seat surface at its upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985149757U JPH0514025Y2 (en) | 1985-09-30 | 1985-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985149757U JPH0514025Y2 (en) | 1985-09-30 | 1985-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6256496U JPS6256496U (en) | 1987-04-08 |
| JPH0514025Y2 true JPH0514025Y2 (en) | 1993-04-14 |
Family
ID=31065270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985149757U Expired - Lifetime JPH0514025Y2 (en) | 1985-09-30 | 1985-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0514025Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0247791Y2 (en) * | 1985-03-26 | 1990-12-14 |
-
1985
- 1985-09-30 JP JP1985149757U patent/JPH0514025Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6256496U (en) | 1987-04-08 |
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