JPH0483931A - Hydraulic damper - Google Patents
Hydraulic damperInfo
- Publication number
- JPH0483931A JPH0483931A JP19543490A JP19543490A JPH0483931A JP H0483931 A JPH0483931 A JP H0483931A JP 19543490 A JP19543490 A JP 19543490A JP 19543490 A JP19543490 A JP 19543490A JP H0483931 A JPH0483931 A JP H0483931A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- inner tube
- shock absorber
- tube
- circumferential surface
- 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.)
- Granted
Links
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】 （産業上の利用分野） 本発明は車両等に使用する油圧緩衝器に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a hydraulic shock absorber used in vehicles and the like.
（従来の技術）
車両等に使用する倒立型油圧緩衝器としては、アウター
チューブ内に下方からインナーチューブを摺動自在に挿
入し、このインナーチューブ内にダンパーシリンダを植
設し、更にこのタンパ−シリンダ内に上方から中空ロッ
ドを臨ませ、この中空ロッドの先端部にダンパーシリン
ダ内に摺接するピストンを装着したものがある。(Prior art) As an inverted hydraulic shock absorber used in vehicles, etc., an inner tube is slidably inserted from below into an outer tube, a damper cylinder is installed in the inner tube, and the damper cylinder is inserted into the outer tube from below. Some damper cylinders have a hollow rod that faces from above inside the cylinder, and a piston that slides into the damper cylinder is attached to the tip of the hollow rod.
このような油圧緩衝器においては、インナーチューブ先
端部外周面にアウターチューブ内周面に摺接するガイド
ブツシュを、アウターチューブ先端部内周面にはインナ
ーチューブ外周面に摺接するガイドブツシュを嵌着し、
またインナーチューブのガイドブツシュ下側にはインナ
ーチューブとアウターチューブとの間に作動油を導くオ
イル通路孔を形成している。In such a hydraulic shock absorber, a guide bushing that slides against the inner circumferential surface of the outer tube is fitted onto the outer circumferential surface of the tip of the inner tube, and a guide bushing that slides into contact with the outer circumferential surface of the inner tube is fitted onto the inner circumferential surface of the tip of the outer tube. death,
Further, an oil passage hole is formed below the guide bushing of the inner tube to introduce hydraulic oil between the inner tube and the outer tube.
（発明が解決しようとする課題）
しかしながら、上述した油圧緩衝器にあっては、インナ
ーチューブ外周面に嵌着したガイドブツシュ及びインナ
ーチューブのオイル通路孔が伸び切り状態で油面上に位
置してしまい、インナーチューブとアウターチューブと
の作動性が悪くなる。(Problem to be Solved by the Invention) However, in the above-mentioned hydraulic shock absorber, the guide bushing fitted to the outer circumferential surface of the inner tube and the oil passage hole of the inner tube are fully extended and positioned above the oil level. This results in poor operability between the inner tube and outer tube.
（課題を解決するための手段）
上記課題を解決すべく本発明は、インナーチューブのガ
イドブツシュ及びオイル通路孔は伸び切り状態で曲面下
に位置させ、更に必要に応じてガイドブツシュの外周面
にはスパイラル状等の油保持溝を形成するようにした。(Means for Solving the Problems) In order to solve the above problems, the present invention provides that the guide bushing and the oil passage hole of the inner tube are located under a curved surface in a fully extended state, and the outer circumference of the guide bushing is A spiral oil retaining groove is formed on the surface.
（作用）
インナーチューブのガイドブツシュ及びオイル通路孔は
伸び切り状態で油面下に位置するので、常時油面下に位
置することになって、アウターチューブとインナーチュ
ーブとの隙間が常に作動油によって潤滑されるので、摺
動性が向上する。(Function) Since the guide bushing and oil passage hole of the inner tube are located below the oil level when fully extended, they are always located below the oil level, and the gap between the outer tube and the inner tube is always below the oil level. Since it is lubricated by, sliding properties are improved.
そして、ガイドブツシュの外周面に油保持溝を形成する
ことにより、ガイドブツシュ外周面に作動油が保持され
るので、ガイドブツシュ自体の摺動性か向上し、この油
保持溝をスパイラル状に形成することで作動油の保持性
が高まる。By forming an oil retaining groove on the outer circumferential surface of the guide bushing, hydraulic oil is retained on the outer circumferential surface of the guide bushing, improving the sliding properties of the guide bushing itself, and the oil retaining groove is spirally shaped. By forming it into a shape, the retention of hydraulic oil is enhanced.
（実施例） 以下に本発明の実施例を添付図面を参照して説明する。(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明を適用した倒立型油圧緩衝器の半断面図
、第２図は同緩衝器の要部拡大断面図、第３図は同緩衝
器のガイドブツシュの斜視図、第４図は第３図のＩＶ−
ＩＶ線に沿う断面図である。FIG. 1 is a half-sectional view of an inverted hydraulic shock absorber to which the present invention is applied, FIG. 2 is an enlarged sectional view of the main parts of the same shock absorber, FIG. The diagram is IV- in Figure 3.
FIG. 3 is a sectional view taken along line IV.
この緩衝器は、アウターチューブ１内に下方からインナ
ーチューブ２を摺動自在に嵌装している。In this shock absorber, an inner tube 2 is slidably fitted into an outer tube 1 from below.
そして、アウターチューブ１の下端部内周面はインナ−
チューブ２外周面に摺接するガイドブツシュ３を嵌着し
、インナーチューブ２の上端部にはアウタ−チューブ１
内周面に摺接するガイドブツシュ４を嵌着し、またイン
ナーチューブ２にはインナーチューブ２内油室とアウタ
−チューブ１内周面とインナ−チューブ１外周面との間
の隙間５とを連通ずるオイル通路孔６を形成している。The inner circumferential surface of the lower end of the outer tube 1 is
A guide bushing 3 that slides on the outer circumferential surface of the tube 2 is fitted, and an outer tube 1 is attached to the upper end of the inner tube 2.
A guide bushing 4 that slides on the inner tube 2 is fitted, and the inner tube 2 is provided with an oil chamber in the inner tube 2 and a gap 5 between the inner circumferential surface of the outer tube 1 and the outer circumferential surface of the inner tube 1. A communicating oil passage hole 6 is formed.
これらのインナーチューブ２のガイドブツシュ４及びオ
イル通路孔６は、第１図に示すように、緩衝器の伸び切
り状態で油面Ｃより下側になる位置に嵌着し形成してい
る。また、ガイドブツシュ４の外周面には、第３図及び
第４図に示すように、スパイラル状に油保持溝７を形成
している。As shown in FIG. 1, the guide bushing 4 and oil passage hole 6 of the inner tube 2 are fitted and formed at a position below the oil level C when the shock absorber is fully extended. Furthermore, an oil retaining groove 7 is formed in a spiral shape on the outer circumferential surface of the guide bush 4, as shown in FIGS. 3 and 4.
インナーチューブ２内にはダンパーシリンダ９を立設し
、アウターチューブ１の上端部内周面にはフォークボル
ト１０を螺着し、このフォークボルト１０とアジャスト
ケース１１とをアジャストケース１１に進退自在に螺着
したアジャスター１２を介して固定し、アジャストケー
ス１１には中空ロッド１３の上端部を固着し、この中空
ロッド１３はダンパーシリンダ９内に挿通している。A damper cylinder 9 is installed upright in the inner tube 2, a fork bolt 10 is screwed onto the inner circumferential surface of the upper end of the outer tube 1, and the fork bolt 10 and the adjust case 11 are screwed into the adjust case 11 so that they can move forward and backward. The upper end of a hollow rod 13 is fixed to the adjust case 11 via the attached adjuster 12, and the hollow rod 13 is inserted into the damper cylinder 9.
中空ロッド１３の先端部にはピストンホルダ１４を螺着
し、このピストンホルダ１４にはダンパ−シリンダ９内
周面に摺接するピストン１５を固着し、このピストン１
５には油路１６を形成して、この油路１６を開閉するバ
ルブ１７を装着し、また中空ロッド１３には油孔１８を
形成している。A piston holder 14 is screwed onto the tip of the hollow rod 13, and a piston 15 is fixed to the piston holder 14 so as to be in sliding contact with the inner peripheral surface of the damper cylinder 9.
An oil passage 16 is formed in the hollow rod 13, and a valve 17 for opening and closing the oil passage 16 is attached to the hollow rod 13.
そして、ダンパーシリンダ９の上端部にはエンドプレー
ト１９の下側にロッドガイドケース２１を嵌装し、この
ロッドガイドケース２１内には中空ロッド１３を案内す
るロッドガイド２２を嵌装し、またロッドガイドケース
２１の下側にはリバウンドスプリング２３を配設してい
る。A rod guide case 21 is fitted to the upper end of the damper cylinder 9 below the end plate 19, and a rod guide 22 for guiding the hollow rod 13 is fitted inside the rod guide case 21. A rebound spring 23 is arranged below the guide case 21.
インナーチューブ２の下端部外周面には車軸部材２５を
装着し、またダンパーシリンダ９の下端部内周面にはボ
トムホルダ２６を嵌装し、このボトムホルダ２６の上端
部にはダンパ−シリンダ９内周面に接するボトムピスト
ン２７を装着し、このボトムピストン２７には油路２８
を形成して、この油路２８を開閉するバルブ２９を装着
している。An axle member 25 is attached to the outer peripheral surface of the lower end of the inner tube 2, and a bottom holder 26 is fitted to the inner peripheral surface of the lower end of the damper cylinder 9. A bottom piston 27 that is in contact with the circumferential surface is installed, and an oil passage 28 is installed in this bottom piston 27.
A valve 29 is installed to open and close this oil passage 28.
中空ロッド５の外周面にはオイルロックピース３１を保
持部材３２にて保持し、ダンパーシリンダ９の上端外周
面には最圧縮位置付近でオイルロックピース３１に嵌合
するオイルロックカラー３３を取付け、このオイルロッ
クカラー３３には油孔３４を形成している。An oil lock piece 31 is held on the outer circumferential surface of the hollow rod 5 by a holding member 32, and an oil lock collar 33 that fits into the oil lock piece 31 near the maximum compression position is attached to the upper end outer circumferential surface of the damper cylinder 9. This oil lock collar 33 has an oil hole 34 formed therein.
アウターチューブ１の上端部のアジャスター１２にはビ
ン３５を設けて、このビン３５の下端にはカラー３６を
設け、このカラー３６の下端にスプリングシート３７を
保持し、このスプリングシ−ト３７とオイルロックカラ
ー３３の上面に設けたスプリングシート３８との間に懸
架ばね３９を介設している。更に、中空ロッド１３の外
周面には懸架ばね３９のガイドを兼ねたチョーク部材４
０を装着している。A bin 35 is provided on the adjuster 12 at the upper end of the outer tube 1, a collar 36 is provided at the lower end of the bin 35, a spring seat 37 is held at the lower end of the collar 36, and an oil A suspension spring 39 is interposed between the lock collar 33 and a spring seat 38 provided on the upper surface thereof. Furthermore, a choke member 4 that also serves as a guide for the suspension spring 39 is provided on the outer peripheral surface of the hollow rod 13.
0 is installed.
以上のように構成したので、緩衝器の伸縮動に伴ってア
ウターチューブ１内をインナーチューブ２が摺動すると
きに、インナーチューブ２には緩衝器の伸び切り状態で
油面Ｃより下側になる位置にガイドブツシュ４を嵌着し
、オイル通路孔６を形成しているので、アウタ−チュー
ブ１内周面とインナ−チューブ２外周面との間の隙間５
にオイル通路孔６を通じて作動油が通じるので、隙間５
内の圧力が一定に保たれ、またガイドブッシュ４外周面
とアウタ−チューブ１内周面との間に常時油が介在する
ので、アウターチューブ１とインナーチューブ２の摺動
性が良くなる。With the above configuration, when the inner tube 2 slides inside the outer tube 1 as the shock absorber expands and contracts, the inner tube 2 has a surface below the oil level C when the shock absorber is fully extended. Since the guide bushing 4 is fitted in the position where the oil passage hole 6 is formed, the gap 5 between the inner circumferential surface of the outer tube 1 and the outer circumferential surface of the inner tube 2 is
Since the hydraulic oil passes through the oil passage hole 6, the gap 5
Since the internal pressure is kept constant and oil is always present between the outer peripheral surface of the guide bush 4 and the inner peripheral surface of the outer tube 1, the slidability between the outer tube 1 and the inner tube 2 is improved.
また、ガイドブツシュ４の外周面にはスパイラル状に油
保持溝７を形成しているので、ガイドブツシュ４の外周
面に作動油がより多く保持され、ガイドブッシュ４自体
の摺動性が良くなり、−層アウターチューブ１とインナ
ーチューブ２の摺動性が良くなる。In addition, since the oil retaining groove 7 is formed in a spiral shape on the outer circumferential surface of the guide bush 4, more hydraulic oil is retained on the outer circumferential surface of the guide bush 4, and the sliding performance of the guide bush 4 itself is improved. This improves the slidability between the -layer outer tube 1 and the inner tube 2.
（発明の効果）
以上説明したように本発明によれば、インナーチューブ
のガイドブツシュ及びオイル通路孔は伸び切り状態で油
面下に位置させたので、ガイドブツシュ及びオイル通路
孔は常時油面下に位置することになって、アウターチュ
ーブとインナーチューブとの隙間の圧力が一定に保持さ
れ、作動油によって潤滑されるので、アウターチューブ
とインナーチューブの摺動性が向上する。(Effects of the Invention) As explained above, according to the present invention, the guide bushing and oil passage hole of the inner tube are positioned below the oil level in the fully extended state, so that the guide bush and oil passage hole are always kept in the oil. Since it is located below the surface, the pressure in the gap between the outer tube and the inner tube is maintained constant and is lubricated by the hydraulic oil, so the sliding performance between the outer tube and the inner tube is improved.
そして、ガイドブツシュの外周面に油保持溝を形成する
ことにより、ガイドブツシュ外周面に作動油が保持され
るので、ガイドブツシュ自体の摺動性が向上し、この油
保持溝をスパイラル状に形成することで作動油の保持性
が高まり、−層アウターチューブとインナーチューブの
摺動性が向上する。By forming an oil retaining groove on the outer circumferential surface of the guide bushing, hydraulic oil is retained on the outer circumferential surface of the guide bushing, which improves the slidability of the guide bushing itself. By forming the tube into a shape, the retention of hydraulic oil is improved, and the slidability between the outer tube and the inner tube is improved.
第１図は本発明を適用した倒立型油圧緩衝器の半断面図
、第２図は同緩衝器の要部拡大断面図、第３図は同緩衝
器のガイドブツシュの斜視図、第４図は第３図のｒＶ−
ｒＶ線に沿う断面図である。
尚、図面中、１はアウターチューブ、２はインナーチュ
ーブ、４はガイドブツシュ、５は隙間、６はオイル通路
孔、９はダンパーシリンダ、１３は中空ロッド、１５は
ピストンである。FIG. 1 is a half-sectional view of an inverted hydraulic shock absorber to which the present invention is applied, FIG. 2 is an enlarged sectional view of the main parts of the same shock absorber, FIG. The figure is rV- in Figure 3.
FIG. 3 is a cross-sectional view taken along the rV line. In the drawings, 1 is an outer tube, 2 is an inner tube, 4 is a guide bush, 5 is a gap, 6 is an oil passage hole, 9 is a damper cylinder, 13 is a hollow rod, and 15 is a piston.
Claims (3)
在に嵌装し、前記インナーチューブの外周にガイドブッ
シュを嵌着するとともに内外を連通するオイル通路孔を
形成した油圧緩衝器において、前記ガイドブッシュ及び
オイル通路孔は伸び切り状態での油面よりも下方に位置
することを特徴とする油圧緩衝器。(1) In a hydraulic shock absorber, an inner tube is slidably fitted into an outer tube, a guide bush is fitted to the outer periphery of the inner tube, and an oil passage hole is formed to communicate between the inside and outside. A hydraulic shock absorber characterized in that the oil passage hole is located below the oil level in a fully extended state.
したことを特徴とする請求項（１）に記載の油圧緩衝器
。(2) The hydraulic shock absorber according to claim 1, wherein an oil retaining groove is formed on the outer peripheral surface of the guide bush.
形成したことを特徴とする請求項（２）に記載の油圧緩
衝器。(3) The hydraulic shock absorber according to claim 2, wherein the oil retaining groove of the guide bush is formed in a spiral shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195434A JP2534382B2 (en) | 1990-07-24 | 1990-07-24 | Inverted hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2195434A JP2534382B2 (en) | 1990-07-24 | 1990-07-24 | Inverted hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0483931A true JPH0483931A (en) | 1992-03-17 |
| JP2534382B2 JP2534382B2 (en) | 1996-09-11 |
Family
ID=16340997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2195434A Expired - Fee Related JP2534382B2 (en) | 1990-07-24 | 1990-07-24 | Inverted hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534382B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308196A (en) * | 2003-06-10 | 2005-11-04 | Showa Corp | Front forks such as motorcycles |
| EP4628395A1 (en) * | 2024-04-02 | 2025-10-08 | Sram, Llc. | Bicycle front forks having features to distribute lubricant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223292U (en) * | 1988-07-29 | 1990-02-15 |
-
1990
- 1990-07-24 JP JP2195434A patent/JP2534382B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223292U (en) * | 1988-07-29 | 1990-02-15 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005308196A (en) * | 2003-06-10 | 2005-11-04 | Showa Corp | Front forks such as motorcycles |
| EP4628395A1 (en) * | 2024-04-02 | 2025-10-08 | Sram, Llc. | Bicycle front forks having features to distribute lubricant |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2534382B2 (en) | 1996-09-11 |
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