JPS58110386A - Front fork with antidive mechanism - Google Patents

Front fork with antidive mechanism

Info

Publication number
JPS58110386A
JPS58110386A JP21261681A JP21261681A JPS58110386A JP S58110386 A JPS58110386 A JP S58110386A JP 21261681 A JP21261681 A JP 21261681A JP 21261681 A JP21261681 A JP 21261681A JP S58110386 A JPS58110386 A JP S58110386A
Authority
JP
Japan
Prior art keywords
front fork
outer cylinder
oil passage
cylinder
rod
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
Application number
JP21261681A
Other languages
Japanese (ja)
Inventor
伊藤 日出国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIYOUWA SEISAKUSHO KK
SHOWA Manufacturing
Original Assignee
SHIYOUWA SEISAKUSHO KK
SHOWA Manufacturing
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHIYOUWA SEISAKUSHO KK, SHOWA Manufacturing filed Critical SHIYOUWA SEISAKUSHO KK
Priority to JP21261681A priority Critical patent/JPS58110386A/en
Publication of JPS58110386A publication Critical patent/JPS58110386A/en
Pending legal-status Critical Current

Links

Landscapes

  • Axle Suspensions And Sidecars For Cycles (AREA)
  • 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】 本発明は、制動時のブレーキトルクを利用して外筒側部
の連通油路を閉塞する式のアンチダイブ機構を付設して
成るフロントフォークの改良に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a front fork equipped with an anti-dive mechanism that uses brake torque during braking to close a communicating oil passage on the side of an outer cylinder.

前車輪をフロントフォークで支持する車両においては、
制動時の重心の移動、慣性力等に起因するフロントフォ
ークの沈み込みが起こり、特に急制動時にはフロントフ
ォークが全屈に近い状態となり、操縦安定上好ましくな
い。
In vehicles where the front wheels are supported by the front forks,
The front fork sinks due to movement of the center of gravity and inertia during braking, and especially during sudden braking, the front fork becomes nearly fully bent, which is unfavorable in terms of steering stability.

そこで、斯るフロントフォークの沈み込みを防止すべ〈
従来から種々の形式のアンチダイブ機構が提案されてい
る。第3図にこの種アンチダイブ機構を備えて成るフロ
ントフォークの一例を示すが、従来はこのアンチダイブ
機構を設けるγこめ同図に示す如(外筒1′の仙1面を
平面加工し、加工面i a/にシートパイプ3′の内外
の油室Sr、 S、;を連通する油路12を形成すると
ともに、核油路12′を自在に開閉するバルブ部材24
′を内部に備えて成2− るバルブケース10′をボルト25′・・にて外筒1′
に締結していた。
Therefore, it is necessary to prevent the front fork from sinking.
Various types of anti-dive mechanisms have been proposed in the past. Fig. 3 shows an example of a front fork equipped with this kind of anti-dive mechanism. Conventionally, this anti-dive mechanism was provided by machining the outer cylinder 1' into a flat surface, as shown in Fig. 3. A valve member 24 that forms an oil passage 12 that communicates the inner and outer oil chambers Sr, S,;
2. Connect the valve case 10', which is equipped with a
It was concluded.

斯る従来のフロントフォークにおいては、バルブケース
10′を単独で製作する関係上その形状が複雑で、加工
が面倒なものとなっていた。又バルブケース10′内に
はバルブ部材24′、スプリング28′等が印体で組み
込まれる1こめ、これらの組み作業が面倒、且つ煩雑で
あった。
In such a conventional front fork, since the valve case 10' is manufactured separately, its shape is complicated and machining is troublesome. Furthermore, the valve member 24', spring 28', etc. are assembled into the valve case 10' by stamping, making the assembly work troublesome and complicated.

本発明者は斯ろ従来の問題に鑑み、これを゛有効に解決
すべ(本発明を成したもので、その目的とする処は、外
筒側部を膨出して外方へ開口するバルブケースな一体に
形成し、該バルブケースに予めプッシュロッド、バルブ
部材等を組付一体化して成る蓋材を締結することにより
、大幅な構造単純化及びプッシュロッド、スプリング、
バルブ部材等のアンチダイブ機構構成部品の組伺の容易
化を図り得るよ5KLfこアンチダイブ機構付フロント
フォークを提供するにある。
In view of the conventional problems, the inventor of the present invention has devised an effective solution to the problem. By forming the push rod, the valve member, etc. in one piece, and fastening the cover material which is made by pre-assembling the push rod, valve member, etc. to the valve case, the structure can be greatly simplified and the push rod, spring, etc.
An object of the present invention is to provide a front fork with an anti-dive mechanism, which facilitates assembly of anti-dive mechanism components such as valve members.

以下に本発明の好適一実施例を添付図面に基づいて詳述
する。
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

第1図は本発明に係るフロントフォークの一部破断01
11面図、第2図(・工同フロントフォーク下部の破断
側面図である。
Figure 1 shows a partially broken front fork according to the present invention 01
11 side view, Figure 2 (-This is a cutaway side view of the lower part of the front fork.

第1図において1は」一方が開「1した外筒であり、外
筒1内には上方より内筒2が摺動自在に嵌合(−1更に
内筒2の内周部には」−記外筒1の内底部にこれ1と同
窓的に植設されたシートパイプ3の拡径先端部3aが摺
接している。
In Fig. 1, 1 is an outer cylinder with one side open, and an inner cylinder 2 is slidably fitted into the outer cylinder 1 from above. - The enlarged diameter tip 3a of the sheet pipe 3, which is installed in the same manner as the outer cylinder 1, is in sliding contact with the inner bottom of the outer cylinder 1.

そして外筒1の上端にはオイルシール4及びダストシー
ル5が設けられ、これらの作用で外筒1と内筒2との相
対摺動は気密、目一つ油密に成され、外筒1内部へのダ
ストの侵入Q工防止される。円筒2Q工その−L方が蓋
体6にて閉塞され、父これの下方内部にはチェックバル
ブ7が設けられている。
An oil seal 4 and a dust seal 5 are provided at the upper end of the outer cylinder 1, and by these actions, the relative sliding between the outer cylinder 1 and the inner cylinder 2 is made airtight and oil-tight. The intrusion of dust into Q is prevented. The -L side of the cylinder 2Q is closed with a lid 6, and a check valve 7 is provided inside the lower part of the cylinder.

斯(して外筒1と内筒2とで構成される空間は図示の如
くシートパイプ内室Sl及び外室S2、中間室S3、上
部室S4とに区画され、夫々の室には作動油が」」入さ
れている。父上部室84内の内筒2F端とシートバイブ
3の上端間にはクッンヨンスプリング8が張架されてお
り、中間室53vCはストンバスプリング9が設けられ
ている。
In this way, the space constituted by the outer cylinder 1 and the inner cylinder 2 is divided into a seat pipe inner chamber Sl, an outer chamber S2, an intermediate chamber S3, and an upper chamber S4, as shown in the figure, and each chamber is filled with hydraulic oil. A spring 8 is stretched between the end of the inner cylinder 2F in the father's upper chamber 84 and the upper end of the seat vibrator 3, and a spring 9 is installed in the intermediate chamber 53vC. There is.

そして内筒2上端は車体側に連結され、外筒1はこれに
一体に設けられた取付ブラグツ)IaをRして車輪側に
取付支持され、両者1,2は相対伸縮動する如(構成さ
れている。
The upper end of the inner cylinder 2 is connected to the vehicle body side, and the outer cylinder 1 is mounted and supported on the wheel side by rounding the mounting plugs (Ia) provided integrally thereon, and both 1 and 2 are configured to move relative to each other. has been done.

一方、外筒1の下方側部には第2図に示す如(外方へ開
口したバルブケース10が一体に膨出成形されており、
該ケース10内部上方はバルブ作動室S5が、下方は連
通油路11が形成されている。
On the other hand, on the lower side of the outer cylinder 1, as shown in FIG.
A valve operating chamber S5 is formed in the upper part of the inside of the case 10, and a communicating oil passage 11 is formed in the lower part.

そしてこの上部作動室S5&′f、外筒1側部に穿設さ
れた通油孔12を弁してシートバイブ外室S2に連通し
ており、又連通油路11は同じ(外筒1に設けられた通
油孔13、固定部材14に設けられた通油孔15及びシ
ートパイプ固定部材16に設けられた通油孔17を介し
てシートパイプ内室5tVC連通している。尚図中18
はチェックバルブである。
This upper working chamber S5&'f communicates with the seat vibe outer chamber S2 by valving the oil passage hole 12 bored in the side of the outer cylinder 1, and the communication oil passage 11 is the same (in the outer cylinder 1). The inner chamber of the seat pipe 5tVC is in communication with the inner chamber of the seat pipe 5tVC through the provided oil hole 13, the oil hole 15 provided in the fixing member 14, and the oil feed hole 17 provided in the seat pipe fixing member 16.
is a check valve.

上記バルブケース10の開口部内周にはメネジが刻設さ
れ、この部には外方より開口部を閉塞する如く蓋材19
が螺着されている。この蓋材19の中央部には図示の如
(プッシュロッド20が通油孔12に対して同窓的にシ
ールリング21を介して気密、旧つ油密に挿通されてお
り、該ロッド20の内方端部には図示の如(順にリバウ
ンドラバー22、金属板23、シールバルブ24がボル
ト25にて三枚締めされている。他方ロッド20の外方
端部にはリング状係止部材26及び制動時のブレーキト
ルクに連動するトルクロッド(図示せず)の一端を連結
する取付部拐27が固着されている。
A female thread is carved on the inner periphery of the opening of the valve case 10, and a lid member 19 is provided in this part so as to close the opening from the outside.
is screwed on. As shown in the figure, a push rod 20 is inserted through the oil hole 12 in an air-tight and oil-tight manner through a seal ring 21 in the center of the lid member 19. As shown in the figure, a rebound rubber 22, a metal plate 23, and a seal valve 24 are fastened in this order with bolts 25.On the other hand, a ring-shaped locking member 26 and a ring-shaped locking member 26 are attached to the outer end of the rod 20. A mounting portion 27 is fixed to connect one end of a torque rod (not shown) that is linked to brake torque during braking.

そして上記蓋体19と係止部材26間には図示の如くリ
ターンスプリング28が張架されており、プッシュロッ
ド20は通常時は図示の如(左限に位置し、従って通油
孔12は開放状態にある。尚図中29は可撓性弾性体か
ら成るカバーである。
A return spring 28 is stretched between the lid body 19 and the locking member 26 as shown in the figure, and the push rod 20 is normally located at the left end as shown in the figure, so the oil passage hole 12 is open. In the figure, 29 is a cover made of a flexible elastic body.

以上バルブケース10内に収納された部品、即ち蓋体1
9、プッシュロッド20、シールバルブ24、リターン
スプリング28等がアンチダイブ機構を構成する。
The parts housed in the valve case 10, namely the lid body 1
9, push rod 20, seal valve 24, return spring 28, etc. constitute an anti-dive mechanism.

次に以上説明したフロントフォークの作用について説明
する。
Next, the function of the front fork described above will be explained.

圧縮行程について説明するに、内筒2が外筒1に対して
相対的に下動すれば、シートパイプ外室82内の作動油
の圧力は高まり、この外室S1の体積減少分に相当する
作動油の一部はバルブ7を押し開けて中間室83内に流
入し、他の残りの作動油に通油孔12、バルブ作動室S
5、連通油路11、通油孔13,15.17Y経てシー
トパイプ内室S1に流入する。そしてこの作動油がも通
油孔を通過する際の流動損失によって所要の減衰力が得
られ、フロントフォークはその所期の目的を達する。
To explain the compression stroke, when the inner cylinder 2 moves downward relative to the outer cylinder 1, the pressure of the hydraulic oil in the seat pipe outer chamber 82 increases, which corresponds to the volume reduction of the outer chamber S1. A part of the hydraulic oil pushes open the valve 7 and flows into the intermediate chamber 83, and the remaining hydraulic oil flows through the oil passage hole 12 and the valve operating chamber S.
5. It flows into the seat pipe inner chamber S1 through the communication oil passage 11, oil passage holes 13, 15, and 17Y. The required damping force is obtained by the flow loss when this hydraulic oil passes through the oil passage hole, and the front fork achieves its intended purpose.

而して車両が制動をかけた場合、重心の移動、慣性力等
により円筒2に&X下回の力が作用し、これを受けてフ
ロントフォークは上記圧縮行程に移り、その結果フロン
トフォークが沈み込みを開始しJ5とする。
When the vehicle brakes, a force below &X acts on the cylinder 2 due to the movement of the center of gravity, inertia, etc. In response to this, the front fork moves to the compression stroke, and as a result, the front fork sinks. Start loading and set it to J5.

ところか、制動時のブレーキトルクに連動するトルクロ
ラドの作用でプンシT1. j)ラド20の取付部材1
9には第2図中矢印方向の力が作用し、この力を受けて
ブツシュロッド20はリターンスプリング28の弾発力
に抗して図中右動し、該ロッド20の端部に設けたシー
ルバルブ24は通油孔12を閉塞し、シートパイプ内、
外室S、、S2の連通を遮断する。この結果作動油の流
動は+51i止され、フロントフォークは略々用状態と
なり、前記フロントフォークの沈み込みは有効に阻止さ
れ、従って操縦安定性が害されろことがない。
However, due to the action of Torque Rado which is linked to the brake torque during braking, Punshi T1. j) Mounting member 1 of RAD 20
9 is acted upon by a force in the direction of the arrow in FIG. The valve 24 closes the oil passage hole 12, and inside the seat pipe,
Communication between the outer rooms S, S2 is cut off. As a result, the flow of the hydraulic oil is stopped by +51i, the front fork is almost in use, and sinking of the front fork is effectively prevented, so that the steering stability is not impaired.

斯くて本発明に係るフロントフォークは、アンチダイブ
機能を有している他、その構成においては特にバルブケ
ース10を外筒1と一体に成形したため、第2図と第3
図を比較対照して明らかな如く該バルブケース10の形
状が単純化する。
Thus, the front fork according to the present invention not only has an anti-dive function, but also has a structure in which the valve case 10 is integrally molded with the outer cylinder 1.
As is clear from comparing and contrasting the figures, the shape of the valve case 10 is simplified.

又アンチダイブ機構を構成する部品、即ちブツシュロッ
ド20、シールバルブ24.lJターンスプリング28
等を蓋体19に予め組み伺けておくことが可能であり、
組立作業においては上記各部品を組付一体化した蓋体1
9をバルブケース10に単に螺着するのみで足りろ1こ
め、組立作業能率が著しく同上し、量産上類る好都合と
なる。
Also, the parts constituting the anti-dive mechanism, namely the bushing rod 20, the seal valve 24. lj turn spring 28
etc. can be assembled into the lid body 19 in advance,
In the assembly work, the lid body 1 is assembled and integrated with each of the above parts.
Simply screwing 9 into the valve case 10 is sufficient, and the efficiency of the assembly work is significantly improved, making it extremely convenient for mass production.

以上の説明で明らかな如(本発明によれば、外筒側部を
膨出して外方へ開口するバルブケースを一体に形成し、
該バルブケースに予めブツシュロッド、バルブ部材等の
部品を組付一体化して成る蓋材を締結するようにしたた
め、大幅な構造単純化を図ることができるとともに、上
記バルブケース内に収納される各部品の組付容易化が図
れ、量産上好都合となる。
As is clear from the above description (according to the present invention, the valve case that bulges out the side of the outer cylinder and opens outward is integrally formed,
Since the valve case is fitted with a cover material made by assembling and integrating components such as a bushing rod and valve member in advance, the structure can be significantly simplified, and each component housed within the valve case can be fastened to the valve case. Assembling can be facilitated, which is convenient for mass production.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係るフロントフォークの一部破断側面
図、第2図は同フロントフォーク下部の破断側面図、第
3図は従来例に係るフロントフォーク下部の破断側面図
である。 尚図面中1は外筒、2は内筒、3はシートパイプ、10
はバルブケース、12.13. 15.17は通油孔、
19は蓋材、20はブツシュロッド、24はシールバル
ブ、27は取付部材、28はリターンスプリング、Sl
はシートパイプ内室、S2はシートパイプ外室、85G
!バルブ作動室である。 特許出願人 株式会社昭和製作所 代理人弁理士  下  1) 容一部
FIG. 1 is a partially cutaway side view of a front fork according to the present invention, FIG. 2 is a cutaway side view of a lower part of the front fork, and FIG. 3 is a cutaway side view of a lower part of a front fork according to a conventional example. In the drawings, 1 is an outer cylinder, 2 is an inner cylinder, 3 is a seat pipe, and 10
is the valve case, 12.13. 15.17 is the oil hole,
19 is a cover material, 20 is a bushing rod, 24 is a seal valve, 27 is a mounting member, 28 is a return spring, Sl
is seat pipe inner room, S2 is seat pipe outer room, 85G
! This is the valve operating chamber. Patent applicant: Showa Seisakusho Co., Ltd. Representative Patent Attorney (Part 2) 1) Yobetsu

Claims (1)

【特許請求の範囲】[Claims] 外筒内に円筒を摺動自在に嵌合するとともに、外筒内底
部にシートパイプを植設し、該シート・々イブの拡径先
端部を前記内筒内に摺接させ、且つ外筒側部にシートパ
イプ内外の油室な連通ずる油路を形成し、該油路な制動
時のブレーキトルりを受けて作動するバルブ部材により
閉塞するようにしTこアンチダイブ機構付フロントフォ
ークにおいて、前記外筒側部に外方へ開口したパルプケ
ースを一体に設け、該パルプケースにこれの開口部を閉
塞する如く蓋材を固定するとともに、該蓋材にブツシュ
ロッドを摺動自在に嵌合し、該ロッドの一端に前記油路
な閉塞するパルプ部材を装着し、他端に制動時のブレー
キトルクに連動するトルクロッドの取付部材を固層し、
スプリングにより上記ブツシュロッドを外方へ付勢する
ように構成したことを特徴とするアンチダイブ機構付フ
ロントフォーク。
A cylinder is slidably fitted into the outer cylinder, a sheet pipe is planted in the inner bottom of the outer cylinder, and the enlarged diameter tip of the seat pipe is brought into sliding contact with the inside of the inner cylinder, and the outer cylinder In a front fork with an anti-dive mechanism, an oil passage communicating with the oil chamber inside and outside the seat pipe is formed on the side part, and the oil passage is closed by a valve member that operates in response to brake torque during braking. A pulp case opening outward is integrally provided on the side of the outer cylinder, a lid member is fixed to the pulp case so as to close the opening of the pulp case, and a bushing rod is slidably fitted to the lid member. , a pulp member that closes the oil passage is attached to one end of the rod, and a mounting member for a torque rod that is linked to brake torque during braking is fixed to the other end;
A front fork with an anti-dive mechanism, characterized in that the bushing rod is biased outward by a spring.
JP21261681A 1981-12-24 1981-12-24 Front fork with antidive mechanism Pending JPS58110386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21261681A JPS58110386A (en) 1981-12-24 1981-12-24 Front fork with antidive mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21261681A JPS58110386A (en) 1981-12-24 1981-12-24 Front fork with antidive mechanism

Publications (1)

Publication Number Publication Date
JPS58110386A true JPS58110386A (en) 1983-06-30

Family

ID=16625624

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21261681A Pending JPS58110386A (en) 1981-12-24 1981-12-24 Front fork with antidive mechanism

Country Status (1)

Country Link
JP (1) JPS58110386A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6167293U (en) * 1984-10-11 1986-05-08
JPS61235285A (en) * 1985-04-11 1986-10-20 ヤマハ発動機株式会社 Car-height regulator for motorcycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6167293U (en) * 1984-10-11 1986-05-08
JPS61235285A (en) * 1985-04-11 1986-10-20 ヤマハ発動機株式会社 Car-height regulator for motorcycle

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