JPH0356672Y2 - - Google Patents
Info
- Publication number
- JPH0356672Y2 JPH0356672Y2 JP19354086U JP19354086U JPH0356672Y2 JP H0356672 Y2 JPH0356672 Y2 JP H0356672Y2 JP 19354086 U JP19354086 U JP 19354086U JP 19354086 U JP19354086 U JP 19354086U JP H0356672 Y2 JPH0356672 Y2 JP H0356672Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- cylinder
- oil lock
- lock collar
- shock absorber
- 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
- 239000006096 absorbing agent Substances 0.000 claims description 14
- 230000035939 shock Effects 0.000 claims description 14
- 239000003921 oil Substances 0.000 description 87
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000725 suspension Substances 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）
本考案は自動二輪車のフロントフオーク等とし
て用いる緩衝器の伸切り時の衝撃を緩和するオイ
ルロツク機構に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an oil lock mechanism that cushions the impact when a shock absorber used as a front fork of a motorcycle is extended or fully extended.
（従来の技術）
自動二輪車等に用いる緩衝器としてロツドタイ
プと称されるものがある。(Prior Art) There is a type of shock absorber used in motorcycles and the like called a rod type.
斯るタイプの緩衝器の構造は第５図に示すよう
に、ボトムケース等の内側に配設されるシリンダ
１００内にフオークパイプ等に一端が固着された
ロツド１０１を挿入し、シリンダ１００の上端内
側にはロツド１０１外周に摺接するロツドガイド
１０２を、ロツド１０１下端にはシリンダ１００
内周面に摺接するピストン１０３を設け、更に緩
衝器の伸切り時の衝撃を緩和すべく、シリンダ１
００の上面内側にはオイルロツクカラー１０４
を、ロツド１０１外周には前記オイルロツクカラ
ー１０４内に伸長時に進入するオイルロツクピー
ス１０５を設けている。 As shown in FIG. 5, the structure of this type of shock absorber is such that a rod 101 with one end fixed to a fork pipe or the like is inserted into a cylinder 100 disposed inside a bottom case or the like, and the upper end of the cylinder 100 is A rod guide 102 that slides on the outer circumference of the rod 101 is installed on the inside, and a cylinder 100 is installed at the lower end of the rod 101.
A piston 103 is provided that slides on the inner circumferential surface of the cylinder 1, and the cylinder 1
Oil lock collar 104 on the inside of the top surface of 00
An oil lock piece 105 is provided on the outer periphery of the rod 101, which enters into the oil lock collar 104 when it is extended.
（考案が解決しようとする問題点）
上述した従来のオイルロツク機構にあつては、
第５図の左側部分に示す状態から緩衝器に伸び行
程に移ると、第５図の右側部分に示すようにオイ
ルロツクピース１０５がオイルロツクカラー１０
４内側の油室１０６に進入し、この油室１０６内
に油を封じ込めることでオイルロツクがかかるよ
うになつているが、伸切り状態から圧縮行程に移
る際に、油室１０６内がバキユーム状態となり、
スムーズに圧縮行程に移行できず、硬いフイーリ
ングとなる。(Problems to be solved by the invention) Regarding the conventional oil lock mechanism described above,
When the shock absorber moves from the state shown on the left side of FIG.
4 enters the inner oil chamber 106 and seals the oil in this oil chamber 106, thereby locking the oil. However, when moving from the fully extended state to the compression stroke, the inside of the oil chamber 106 becomes vacuumed. ,
It is not possible to smoothly transition to the compression stroke, resulting in a hard feeling.
（問題点を解決するための手段）
上記問題点を解決すべく本考案は、緩衝器内に
シリンダを配設し、このシリンダ内にロツドを挿
入し、シリンダ内側には伸切り時の衝撃を緩和す
るオイルロツクカラーを、ロツド外周にはオイル
ロツクカラー内に進入するオイルロツクピースを
設けたものにおいて、シリンダにシリンダ外側の
油室とオイルロツクカラー内側の油室を連通する
油孔を形成し、更にオイルロツクカラーを伸長時
に前記連通状態を遮断するように移動可能とし
た。(Means for Solving the Problems) In order to solve the above problems, the present invention disposes a cylinder inside the shock absorber, inserts a rod into this cylinder, and has the inside of the cylinder absorb the impact during extension and cutting. In the case where the oil lock collar is equipped with an oil lock piece that enters the oil lock collar on the outer periphery of the rod, an oil hole is formed in the cylinder to communicate the oil chamber on the outside of the cylinder and the oil chamber inside the oil lock collar. Furthermore, the oil lock collar is movable so as to interrupt the communication state when the oil lock collar is extended.
（作用）
伸長時にはオイルロツクピースがオイルロツク
カラー内に進入することでオイルロツクカラーが
上動し、この上動によりオイルロツクカラー内側
の油室とシリンダ外側の油室との連通状態が遮断
され、また伸切り状態から圧縮行程に移行する
と、オイルロツクカラーが下動し、オイルロツク
カラー内側の油室とシリンダ外側の油室とが油孔
を介して連通状態となり、シリンダ外側の油室か
らオイルロツクカラー内側の油室へ油が流入す
る。(Function) When extended, the oil lock piece moves into the oil lock collar, causing the oil lock collar to move upward, and this upward movement interrupts the communication between the oil chamber inside the oil lock collar and the oil chamber outside the cylinder. Also, when the extension state shifts to the compression stroke, the oil lock collar moves downward, and the oil chamber inside the oil lock collar and the oil chamber on the outside of the cylinder are in communication via the oil hole, so that the oil chamber on the outside of the cylinder Oil flows into the oil chamber inside the oil lock collar.
（実施例）
以下に本考案の実施例を添付部面に基いて説明
する。(Example) An example of the present invention will be described below based on the attached parts.
第１図は本考案に係るオイルロツク機構を適用
した緩衝器の全体図、第２図及び第３図はオイル
ロツク機構の作用を説明する要部拡大図である。 FIG. 1 is an overall view of a shock absorber to which an oil lock mechanism according to the present invention is applied, and FIGS. 2 and 3 are enlarged views of essential parts for explaining the operation of the oil lock mechanism.
緩衝器のボトムケース１内にはフオークパイプ
２が摺動自在に上方から挿入され、このフオーク
パイプ２の内方には下端部がボトムケース１底部
に固着されたシリンダ３が配設され、このシリン
ダ３内には上端が前記フオークパイプ２に固着さ
れたロツド４が挿入されている。また、フオーク
パイプ２上端はフオークボルト６にて閉塞され、
このフオークボルト６下方にはカラー７及びスプ
リングシート８が配設され、このスプリングシー
ト８とシリンダ３上端間に懸架スプリング９が縮
装されている。また、第２図及び第３図にも示す
ように、シリンダ３の上端部にはロツド４外周面
に摺接するロツドガイド１０がバルブストツパー
１１，１１間に保持され、ロツド４下端にはシリ
ンダ３内周面に摺接するピストン１２が設けら
れ、このピストン１２にはシリンダ３内の上下の
油室を連通する油孔１３及びチエツクバルブ１４
が設けられている。更にピストン１２の上部には
オイルロツクピース１５が固着され、シリンダ３
内側には該オイルロツクピース１５が進入するオ
イルロツクカラー１６が設けられ、こりオイルロ
ツクカラー１６よりも上方位置のシリンダ３に油
孔１７が形成され、この油孔１７によつてシリン
ダ３外側の油室S1とオイルロツクカラー１６内側
の油室S2とが連通している。 A fork pipe 2 is slidably inserted into the bottom case 1 of the shock absorber from above, and a cylinder 3 whose lower end is fixed to the bottom of the bottom case 1 is disposed inside the fork pipe 2. A rod 4 whose upper end is fixed to the fork pipe 2 is inserted into the cylinder 3. In addition, the upper end of the fork pipe 2 is closed with a fork bolt 6,
A collar 7 and a spring seat 8 are arranged below the fork bolt 6, and a suspension spring 9 is compressed between the spring seat 8 and the upper end of the cylinder 3. Further, as shown in FIGS. 2 and 3, a rod guide 10 that slides on the outer peripheral surface of the rod 4 is held at the upper end of the cylinder 3 between valve stoppers 11, and a rod guide 10 is held between the valve stoppers 11 and 11 at the lower end of the rod 4. A piston 12 that slides on the inner peripheral surface is provided, and this piston 12 has an oil hole 13 and a check valve 14 that communicate the upper and lower oil chambers in the cylinder 3.
is provided. Furthermore, an oil lock piece 15 is fixed to the upper part of the piston 12, and the oil lock piece 15 is fixed to the upper part of the piston 12.
An oil lock collar 16 into which the oil lock piece 15 enters is provided on the inside, and an oil hole 17 is formed in the cylinder 3 at a position above the oil lock collar 16. The oil chamber S1 and the oil chamber S2 inside the oil lock collar 16 communicate with each other.
ここで前記オイルロツクカラー１６はストツパ
リング１８によつてその下動が規制され、上動は
オイルロツクカラー１６上端に設けたフランジ１
９がバルブストツパ１１に当接することで規制さ
れる。そして、フランジ１９とロツド４外周との
間には隙間２０が形成され、フランジ１９とバル
ブストツパ１１との間には隙間２１が形成され、
更にオイルロツクカラー１６、フランジ１９及び
バルブストツパ１１間には前記油孔１７が開口す
る小室S3が形成される。 Here, the downward movement of the oil lock collar 16 is restricted by a stopper ring 18, and the upward movement is restricted by a flange 1 provided at the upper end of the oil lock collar 16.
9 is regulated by coming into contact with the valve stopper 11. A gap 20 is formed between the flange 19 and the outer circumference of the rod 4, and a gap 21 is formed between the flange 19 and the valve stopper 11.
Furthermore, a small chamber S3 in which the oil hole 17 opens is formed between the oil lock collar 16, flange 19, and valve stopper 11.
以上において、第２図に示す状態から緩衝器が
伸長（ロツドが上動）し、オイルロツクピース１
５がオイルロツクカラー１６内面に摺接しつつ油
室S2内に進入すると、油室S2内の圧力が上昇する
とともにオイルロツクピース１５がオイルロツク
カラー１６に摺接しているため、第３図に示すよ
うにオイルロツクカラー１６が上動し、フランジ
１９上面がバルブストツパ１１下面に当接し、隙
間２１を閉じる。隙間２１が閉じられることによ
り、油室S2は密閉状態となりオイルロツク作用が
発揮される。 In the above process, the buffer extends from the state shown in Fig. 2 (the rod moves upward), and the oil lock piece 1
When the oil lock piece 5 enters the oil chamber S2 while slidingly contacting the inner surface of the oil lock collar 16, the pressure inside the oil chamber S2 increases and the oil lock piece 15 is slidingly contacting the oil lock collar 16. As shown in FIG. 2, the oil lock collar 16 moves upward, and the upper surface of the flange 19 comes into contact with the lower surface of the valve stopper 11, closing the gap 21. By closing the gap 21, the oil chamber S2 becomes sealed and an oil locking effect is exerted.
次にオイルロツク状態から緩衝器が圧縮（ロツ
ドが下動）状態に移行すると、油室S2内が減圧さ
れ、小室S3の圧力によつてオイルロツクカラー１
６が下動し、シリンダ３外側の油室S1内の油が小
室S3、隙間２１及び隙間２０を介して油室S2内に
流入し、油室S2内がバキユーム状態となることを
防止する。 Next, when the shock absorber shifts from the oil lock state to the compression state (the rod moves downward), the pressure inside the oil chamber S2 is reduced, and the pressure in the small chamber S3 locks the oil lock collar 1.
6 moves downward, the oil in the oil chamber S 1 on the outside of the cylinder 3 flows into the oil chamber S 2 via the small chamber S 3 , the gap 21 and the gap 20, and the inside of the oil chamber S 2 becomes in a vacuum state. prevent.
第４図は別実施例を示す断面図であり、この実
施例にあつては、フランジを設けず、オイルロツ
クカラー１６上端に突部２２を形成し、この突部
２２によつて小室S3を確保するとともに、オイル
ロツクカラー１６が下方位置にあるときには突部
２２上面とバルブストツパ１１下面との間に隙間
２１を形成するようにしている。 FIG. 4 is a sectional view showing another embodiment. In this embodiment, a flange is not provided and a protrusion 22 is formed at the upper end of the oil lock collar 16, and this protrusion 22 closes the small chamber S3. In addition, when the oil lock collar 16 is in the lower position, a gap 21 is formed between the upper surface of the protrusion 22 and the lower surface of the valve stopper 11.
この実施例にあつても伸長時にあつては油室
S1，S2の連通状態は遮断され、圧縮時には油室
S1，S2が連通する。 Even in this embodiment, when it is extended, the oil chamber
Communication between S 1 and S 2 is cut off, and the oil chamber is closed during compression.
S 1 and S 2 communicate.
（考案の効果）
以上に説明した如く本考案によれば、緩衝器の
伸び行程にあつては、シリンダ外側の油室とオイ
ルロツクカラー内側の油室とは遮断されるため、
従来と同様にオイルロツク作用を発揮することが
でき、圧縮行程時にあつては油孔を介してシリン
ダ外側の油室からオイルロツクカラー内側の油室
へ油が流入するため、バキユーム状態を防止する
ことができ、伸切り状態から圧縮行程への移行を
スムーズに行え、乗り心地性が大幅に向上する。(Effect of the invention) As explained above, according to the invention, during the extension stroke of the shock absorber, the oil chamber outside the cylinder and the oil chamber inside the oil lock collar are isolated, so that
It can exert the same oil lock effect as before, and during the compression stroke, oil flows from the oil chamber on the outside of the cylinder to the oil chamber inside the oil lock collar through the oil hole, preventing a vacuum condition. This allows for a smooth transition from the fully extended state to the compression stroke, greatly improving ride comfort.
第１図は本考案に係るオイルロツク機構を適用
した緩衝器の全体図、第２図及び第３図はオイル
ロツク機構の作用を示す要部拡大断面図、第４図
は別実施例を示す断面図、第５図は従来のオイル
ロツク機構を示す断面図である。
尚、図面中１はボトムケース、２はフオークパ
イプ、３はシリンダ、４はロツド、１１はバルブ
ストツパ、１５はオイルロツクピース、１６はオ
イルロツクカラー、１７は油孔、１８はストツパ
リング、１９はフランジ、２０，２１は隙間、
S1，S2，S3は油室である。
Fig. 1 is an overall view of a shock absorber to which the oil lock mechanism according to the present invention is applied, Figs. 2 and 3 are enlarged sectional views of main parts showing the action of the oil lock mechanism, and Fig. 4 is a sectional view showing another embodiment. , FIG. 5 is a sectional view showing a conventional oil lock mechanism. In the drawing, 1 is the bottom case, 2 is the fork pipe, 3 is the cylinder, 4 is the rod, 11 is the valve stopper, 15 is the oil lock piece, 16 is the oil lock collar, 17 is the oil hole, 18 is the stopper ring, and 19 is the flange. , 20, 21 are gaps,
S 1 , S 2 , and S 3 are oil chambers.
Claims (1)
ンダ内にロツドを挿入し、このロツド外周部には
オイルロツクピースを固着し、シリンダ内周部に
は緩衝器の伸長時に前記オイルロツクピースが進
入するオイルロツクカラーを設けたオイルロツク
機構において、前記シリンダにはシリンダ外側の
油室とオイルロツクカラー内側の油室とを連通す
る油孔が形成され、また前記オイルロツクカラー
は伸長時に前記油孔による連通状態を遮断すべく
移動可能とされていることを特徴とする緩衝器の
オイルロツク機構。 A cylinder is arranged in the oil chamber of the shock absorber, a rod is inserted into the cylinder, an oil lock piece is fixed to the outer circumference of the rod, and the oil lock piece is attached to the inner circumference of the cylinder when the shock absorber is extended. In an oil lock mechanism provided with an oil lock collar that enters, the cylinder is formed with an oil hole that communicates an oil chamber on the outside of the cylinder with an oil chamber inside the oil lock collar, and the oil lock collar is formed in the oil hole when extended. An oil lock mechanism for a shock absorber, characterized in that the oil lock mechanism is movable in order to interrupt the communication state caused by the shock absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19354086U JPH0356672Y2 (en) | 1986-12-16 | 1986-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19354086U JPH0356672Y2 (en) | 1986-12-16 | 1986-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6397733U JPS6397733U (en) | 1988-06-24 |
| JPH0356672Y2 true JPH0356672Y2 (en) | 1991-12-20 |
Family
ID=31149656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19354086U Expired JPH0356672Y2 (en) | 1986-12-16 | 1986-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0356672Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2775156B2 (en) * | 1988-07-19 | 1998-07-16 | 株式会社シヨーワ | Vehicle shock absorber |
-
1986
- 1986-12-16 JP JP19354086U patent/JPH0356672Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6397733U (en) | 1988-06-24 |
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