JPS588840A - Shock absorber - Google Patents
Shock absorberInfo
- Publication number
- JPS588840A JPS588840A JP10342981A JP10342981A JPS588840A JP S588840 A JPS588840 A JP S588840A JP 10342981 A JP10342981 A JP 10342981A JP 10342981 A JP10342981 A JP 10342981A JP S588840 A JPS588840 A JP S588840A
- Authority
- JP
- Japan
- Prior art keywords
- inner tube
- throttle valve
- auxiliary piston
- shock absorber
- outer tube
- 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
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 22
- 230000035939 shock Effects 0.000 title claims abstract description 22
- 238000013016 damping Methods 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
- F16F9/516—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics resulting in the damping effects during contraction being different from the damping effects during extension, i.e. responsive to the direction of movement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、緩衝器に関する。[Detailed description of the invention] The present invention relates to a shock absorber.
第１図は、一般の自動２輪車に用いられている緩衝器１
を示す側面図であり、緩衝器１は、相互に伸縮可能なイ
ンナチューブ２とアウタチューブ３吉からなり、車体の
フレーム４と前輪５との間に介装されている。緩衝器１
は、路面の凹凸によって生ずる振動をばねによって緩衝
するとともに、油の流動抵抗によってばねの上下振動を
抑制、減衰可能としている。Figure 1 shows a shock absorber 1 used in general motorcycles.
2 is a side view showing a shock absorber 1, which is composed of an inner tube 2 and an outer tube 3 that are mutually extendable and retractable, and is interposed between a frame 4 of a vehicle body and a front wheel 5. Buffer 1
The spring cushions vibrations caused by uneven road surfaces, and the vertical vibrations of the spring can be suppressed and damped by oil flow resistance.
第２図は、従来例に係る緩衝器の内部構造を示す断面図
であり、インナチューブ１１はアウタチューブ１２内に
摺動自在に挿入され、アウタチューブ１２内底部に垂設
されている中空ロッド１３はインナチューブ１１の一方
の端面部１１Ａを貫通し、インナチューブ１１内に遊挿
されている。FIG. 2 is a sectional view showing the internal structure of a conventional shock absorber, in which the inner tube 11 is slidably inserted into the outer tube 12, and a hollow rod is vertically disposed at the inner bottom of the outer tube 12. 13 passes through one end surface 11A of the inner tube 11 and is loosely inserted into the inner tube 11.
中空ロッド１３の先端には補助ピストン１４が形成され
、インナチューブ１１の他方の端面と補助ピストン１４
との間にはばね１５が介装されるとともに、インナチュ
ーブ１１が形成する油溜室１６には油が貯溜されている
。An auxiliary piston 14 is formed at the tip of the hollow rod 13, and the other end surface of the inner tube 11 and the auxiliary piston 14
A spring 15 is interposed between the inner tube 11 and an oil reservoir 16 formed by the inner tube 11 to store oil.
このような従来例に係る緩衝器において、インナチュー
ブ１１とアウタチューブ１２とが相互に伸長する伸長行
程時には、油溜室１６の油は、中空ロッド１３の中空部
を通り、更に通孔１７を経て室１８に導かれ、他方、圧
力室１９の油は、チェック弁２０が閉じられていること
から、中空ロッド１３に形成されている絞り孔２１から
配設され、伸長行程時の減衰力を発生するようになって
いる。また、インナチューブ１１とアウタチューブ１２
とが相互に収縮する圧縮行程時には、室１８の油は、チ
ェック弁２０を介して圧力室１９に流入するさともに、
室゛１８における余剰の油は通孔１７から中空ロッド１
３の中空部を経て、油溜室１６へと導かれるようになっ
ている。In such a conventional shock absorber, during the extension stroke in which the inner tube 11 and the outer tube 12 mutually extend, the oil in the oil reservoir chamber 16 passes through the hollow part of the hollow rod 13 and further through the through hole 17. On the other hand, since the check valve 20 is closed, the oil in the pressure chamber 19 is arranged through the throttle hole 21 formed in the hollow rod 13, and reduces the damping force during the extension stroke. It's starting to happen. In addition, the inner tube 11 and the outer tube 12
During the compression stroke in which the
Excess oil in the chamber 18 is drained from the hollow rod 1 through the through hole 17.
3, and is led to the oil reservoir chamber 16.
しかしながら、このような従来例に係る緩衝器において
は、その伸長行程時に油溜室１６の油面中央部が凹面状
に低下するとともに、中空ロッド１３の小内径の中空部
を通過する油の流速が犬となることから、室１８に導か
れる油に空気が混入し、その油が次の圧縮行程時に、チ
ェック弁２０を通って圧力室１９内に流入し、従って、
それに続く伸長行程時の減衰力が不安定となり、所望の
減衰力特性を得ることができないという問題点がある。However, in such a conventional shock absorber, the oil level in the central portion of the oil reservoir chamber 16 decreases in a concave shape during the extension stroke, and the flow rate of oil passing through the hollow portion of the hollow rod 13 with a small inner diameter decreases. Since air is mixed into the oil introduced into the chamber 18, the oil flows into the pressure chamber 19 through the check valve 20 during the next compression stroke, and therefore,
There is a problem in that the damping force during the subsequent extension stroke becomes unstable, making it impossible to obtain desired damping force characteristics.
本発明は、上記従来の問題点に鑑みなされたものであっ
て、安定した減衰性能を得ることができる緩衝器を提供
することを目的吉する。The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a shock absorber that can obtain stable damping performance.
本発明は、上記目的を達成するために、インナチューブ
をアウタチューブ内に摺動自在に挿入し、アウタチュー
ブ内底部に垂設する中空ロッドをインナチューブ内に遊
挿し、中空ロッド先端に補助ピストンを配設し、インナ
チューブとアウタチューブとの伸長行程時に減衰力を発
生する流体圧力室を、インナチューブと中空ロッドと補
助ピストンとによって画成する緩衝器において、インナ
チューブとアウタチューブとの圧縮行程時に比較的大き
く開口し、インナチューブとアウタチューブ士の伸長行
程時に比較的小さく開口する絞り弁を、補助ピストンζ
こ設けるようにしたものである。In order to achieve the above object, the present invention includes an inner tube slidably inserted into an outer tube, a hollow rod hanging down from the bottom of the outer tube loosely inserted into the inner tube, and an auxiliary piston attached to the tip of the hollow rod. In a shock absorber, the inner tube, the hollow rod, and the auxiliary piston define a fluid pressure chamber that generates a damping force during the extension stroke of the inner tube and the outer tube. The auxiliary piston
This is what is provided.
以下、本発明の実施例を図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
第３図および第４図は、本発明に係る緩衝器の一実施例
の内部構造を、それぞれ異なる作動状態において示す断
面図である。インナチュ−ブ３１はアウタチューブ３２
−内に摺動自在に挿入され、アウタチューブ３２内の底
部に垂設される中空口ツ１〜３３はインナチューブ３１
の一方の端面部３１Ａを貫通し、インナチューブ３１内
に遊挿さイアている。中空ロッｌ−’ ３３の先端には
補助ピストン３４が配設され、インナチューブ３１°の
他方の端面と補助ピストン３４との間にはばね３５が介
装され、インナチューブ３１ｉこ形成される油溜室３６
には所定骨の油が貯溜されている。油溜室３６の油は、
中空ロッド３３の中空部、中空ロッド３３に形成されて
いる通孔３７を経て、インナチューブ３１とアウタチュ
ーブ３２と中空ロッド３３さによって画成される室３８
に導入可能となっている。FIGS. 3 and 4 are cross-sectional views showing the internal structure of an embodiment of the shock absorber according to the present invention in different operating states. Inner tube 31 is outer tube 32
- Hollow mouths 1 to 33 which are slidably inserted into the inner tube 31 and are vertically disposed at the bottom of the outer tube 32 are connected to the inner tube 31.
It passes through one end surface 31A of the inner tube 31 and is loosely inserted into the inner tube 31. An auxiliary piston 34 is disposed at the tip of the hollow rod 33, and a spring 35 is interposed between the other end surface of the inner tube 31° and the auxiliary piston 34, and the oil formed on the inner tube 31i is Storage room 36
Predetermined bone oil is stored in the . The oil in the oil sump chamber 36 is
Through the hollow part of the hollow rod 33 and the through hole 37 formed in the hollow rod 33, a chamber 38 defined by the inner tube 31, the outer tube 32, and the hollow rod 33 is formed.
It can be introduced in
更に、インナチューブ３１と中空ロッド３３と補助ピス
トン３４とによって圧力室３９が画成され、圧力室３９
は、後述するように、インナチューブ３１吉アウタチユ
ーブ３２きの伸長行程時に減衰力を発生可能となってい
る。すなわち、圧力室３９を画成する補助ピストン３４
には、第１フランジ３４Ａ、第２フランジ３４Ｂおよび
環状溝３４Ｃが形成され、環状溝３４Ｃには、第５図な
いし第７図に示すようなピストンリング状の絞り弁４０
が装着されている。絞り弁４ｏの外周ｍはインナチュー
ブ３１の内面に摺動可能に密接され、絞り弁４０の内周
部は環状４３４Ｃｏ）底部と０９間に環状通路４１を形
成し、絞り弁４ｏの厚さは環状溝３４ Ｃ（７） ｒ！
＋畠より小とされ、絞り弁４ｏを第１フランジ３４Ａと
第２フランジ３４Ｂとの間で軸方向に移動可能としてい
る。また、絞りプｆ ４００’）一方の端面の周方向２
位置には比較的小なる第１切欠部４０Ａが刻設されると
ともに、絞り弁４゜の他方の端面の周方向４位置には比
較的大なる第２切欠部４０Ｂか刻設されている。従って
、絞り弁４０は、補助ピストン３４の第１フランジ３４
Ａ側に移動し、第１フランジ３４Ａと第１切欠部４０Ａ
吉によって、油溜室３６（！：圧カ室３９とを、比較的
小さな開口を介して連通可能さし、補助ピストン３４の
第２フランジ３４Ｂ側に移動し、第２フランジ３４Ｂと
第２切欠部４０Ｂによって、油溜室３６と圧力室３９と
を比較的大きな開口を介して連通可能としている。Furthermore, a pressure chamber 39 is defined by the inner tube 31, the hollow rod 33, and the auxiliary piston 34.
As will be described later, the damping force can be generated during the extension stroke of the inner tube 31 and the outer tube 32. That is, the auxiliary piston 34 defining the pressure chamber 39
A first flange 34A, a second flange 34B, and an annular groove 34C are formed in the annular groove 34C, and a piston ring-shaped throttle valve 40 as shown in FIGS. 5 to 7 is formed in the annular groove 34C.
is installed. The outer periphery m of the throttle valve 4o is slidably brought into close contact with the inner surface of the inner tube 31, the inner periphery of the throttle valve 40 is annular 434Co), and an annular passage 41 is formed between the bottom and 09, and the thickness of the throttle valve 4o is Annular groove 34 C(7) r!
The throttle valve 4o is made movable in the axial direction between the first flange 34A and the second flange 34B. Also, the aperture f 400') circumferential direction 2 of one end face
A relatively small first notch 40A is cut at one position, and a relatively large second notch 40B is cut at four positions in the circumferential direction on the other end face of the throttle valve 4°. Therefore, the throttle valve 40 is connected to the first flange 34 of the auxiliary piston 34.
Move to the A side, the first flange 34A and the first notch 40A
Due to this, the oil reservoir chamber 36 (!: pressure chamber 39) can communicate with each other through a relatively small opening, moves to the second flange 34B side of the auxiliary piston 34, and connects the second flange 34B and the second notch. The portion 40B enables communication between the oil reservoir chamber 36 and the pressure chamber 39 through a relatively large opening.
次に、上記実施例の作用について説明する。上記緩衝器
の伸長行程時においては、油溜室３６の油は、中空ロッ
ド３３の中空部を通り、更に通孔３７を経て室３８に導
かれる。また、この緩衝器の伸長行程時にあっては、圧
力室３９が容積の減少によって高圧化することから、絞
り弁４０は第３図に示すように第１フランジ３４Ａ側に
移動し、圧力室３９と油溜室３６とは絞り弁４０の第１
切欠部４０Ａと第１フランジ３４Ａとによって形成され
る比較的小なる開口を介して連通される。そこで、この
ような緩衝器の伸長行程時においては、圧力室３９の油
は、上記絞り弁４０によって形成される比較的小なる開
口を経て油溜室３６へ排出され、それによって伸長時の
減衰力が発生可能となる。他方、この緩衝器の圧縮行程
時においては、圧力室３９が容積の増大によって低圧化
することから、絞り弁４０は第４図に示すように第２７
ランジ３４Ｂ側に移動し、油溜室３６と圧力室３９とは
、絞り弁４０の第２切矢部４０Ｂと第２フランジ３４Ｂ
（！：によって形成される比較的大なる開口を介して連
通される。そこで、この圧縮行程時にあっては、油溜室
３６の油が、上記絞り弁４０によって形成される比較的
大なる開口を経て圧力室３９に導かれ、伸長時における
減衰力発生のために貯溜される。また、この圧縮行程時
においては、室３８の油は、通孔３７．中空ロット３３
の中空部を経て、油溜室３６に排出される。Next, the operation of the above embodiment will be explained. During the extension stroke of the shock absorber, the oil in the oil reservoir chamber 36 passes through the hollow portion of the hollow rod 33 and is further led to the chamber 38 via the through hole 37. Further, during the extension stroke of the shock absorber, the pressure in the pressure chamber 39 increases due to the decrease in volume, so the throttle valve 40 moves toward the first flange 34A as shown in FIG. and the oil reservoir chamber 36 are the first part of the throttle valve 40.
They communicate through a relatively small opening formed by the notch 40A and the first flange 34A. Therefore, during the extension stroke of such a shock absorber, the oil in the pressure chamber 39 is discharged into the oil reservoir chamber 36 through the relatively small opening formed by the throttle valve 40, thereby reducing damping during extension. force can be generated. On the other hand, during the compression stroke of this shock absorber, the pressure in the pressure chamber 39 decreases due to the increase in volume, so the throttle valve 40 is moved to the 27th position as shown in FIG.
The oil reservoir chamber 36 and the pressure chamber 39 are moved to the side of the flange 34B, and the second cut arrow portion 40B of the throttle valve 40 and the second flange 34B are connected to each other.
(!:). Therefore, during this compression stroke, the oil in the oil reservoir chamber 36 is communicated through the relatively large opening formed by the throttle valve 40. The oil in the chamber 38 is introduced into the pressure chamber 39 via the through hole 37 and is stored in order to generate a damping force during expansion.
The oil is discharged into the oil reservoir chamber 36 through the hollow part of the oil tank 36.
上記実施例によれば、緩衝器の伸長行程時に減衰力を発
生可能とすへく、圧力室３９に貯溜される油が、圧縮行
程時に、補助ピストン３４に設けた絞り弁４０を介して
、油溜室３６から圧力室３９に直接的に流入されること
から、この油への空気の混入がなく、従って、伸長行程
時に発生する減衰力が安定化し、所望の減衰特性を得る
ことが可能となる。According to the above embodiment, the damping force can be generated during the extension stroke of the shock absorber, and the oil stored in the pressure chamber 39 is allowed to flow through the throttle valve 40 provided in the auxiliary piston 34 during the compression stroke. Since the oil flows directly from the oil reservoir chamber 36 into the pressure chamber 39, there is no air mixed into this oil, and therefore the damping force generated during the extension stroke is stabilized, making it possible to obtain the desired damping characteristics. becomes.
以上のように、本発明は、インナチューブをアウタチュ
ーブ内に摺動自在に挿入し、アウタチューブ内底部に垂
設する中空ロッドをインナチューブ内に遊挿し、中空ロ
ッド先端に補助ピストンを配設し、インナチューブとア
ウタチューブとの伸長行程時に減衰・力を発生する流体
圧力室を、インナチューブと中空ロッドと補助ピストン
とによって画成する緩衝器において、インナチューブと
アウタチューブとの圧縮行程時に比較的大きく開口し、
インナチューブとアウタチューブとの伸長行程時に比較
的小さく開口する絞り弁を、補助ピストンに設けるよう
にしたので、安定した減衰性能を得ることができるとい
う効果を有する。As described above, in the present invention, an inner tube is slidably inserted into an outer tube, a hollow rod hanging vertically at the bottom of the outer tube is loosely inserted into the inner tube, and an auxiliary piston is arranged at the tip of the hollow rod. In a shock absorber, the inner tube, the hollow rod, and the auxiliary piston define a fluid pressure chamber that generates damping and force during the extension stroke of the inner tube and the outer tube. Opens relatively wide,
Since the auxiliary piston is provided with a throttle valve that opens relatively small during the extension stroke of the inner tube and the outer tube, it is possible to obtain stable damping performance.
第１図は一般的な緩衝器が用いられている自動２輪車の
一部を示す側面図、第２図は従来例に係る緩衝器を示す
断面図、第３図は本発明に係る緩衝器の一実施例を示す
断面図、第４図は第３図の異なる作動状態を示す断面図
、第５図は同実施例に用いられている絞り弁を取り出し
て示す断面図、第６図は第５図のＶｌ−Ｖｌ線に沿う矢
視図、第７図は第５図の■−■線に沿う矢視図である。
３１ インナチューブ。
３２・・・アウタチューブ、３３ 中空ロッド。
３４・補助ピストン、３４Ａ 第１フランジ。
３４Ｂ 第２フランジ、３９・・圧力室。
４０ 絞り弁、４０１第ｉ切欠部。
４０Ｂ・第２切欠部。
代理人 弁理士 塩 川 修 治FIG. 1 is a side view showing a part of a motorcycle in which a general shock absorber is used, FIG. 2 is a sectional view showing a conventional shock absorber, and FIG. 3 is a shock absorber according to the present invention. 4 is a sectional view showing a different operating state from FIG. 3; FIG. 5 is a sectional view showing a throttle valve used in the same embodiment; FIG. 6 is a view taken along the line Vl--Vl in FIG. 5, and FIG. 7 is a view taken along the line ■--■ in FIG. 31 Inner tube. 32...Outer tube, 33 Hollow rod. 34・Auxiliary piston, 34A first flange. 34B second flange, 39...pressure chamber. 40 Throttle valve, 401 i-th notch. 40B・Second notch. Agent Patent Attorney Osamu Shiokawa
Claims (1)
挿入し、アウタチューブ内底部に垂設する中空ロッドを
インナチューブ内に遊挿し、中空ロッド先端に補助ピス
トンを配設し、インナチューブとアウタチューブとの伸
長行程時に減衰力を発生する流体圧力室を、インナチュ
ーブと中空ロッドと補助ピストンとによって画成する緩
衝器において、インナチューブとアウタチューブとの圧
縮行程時に比較的大きく開口し、インナチューブとアウ
タチューブとの伸長行程時に比較的小さく開口する絞り
弁を、補助ピストンに設けたことを特徴とする緩衝器。(11 Insert the inner tube slidably into the outer tube, loosely insert the hollow rod hanging down from the inner bottom of the outer tube into the inner tube, arrange an auxiliary piston at the tip of the hollow rod, and connect the inner tube and outer tube. In a shock absorber, a fluid pressure chamber that generates a damping force during an extension stroke between the inner tube and the outer tube is defined by an inner tube, a hollow rod, and an auxiliary piston. A shock absorber characterized in that the auxiliary piston is provided with a throttle valve that opens relatively small during the extension stroke of the outer tube and the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10342981A JPS588840A (en) | 1981-07-03 | 1981-07-03 | Shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10342981A JPS588840A (en) | 1981-07-03 | 1981-07-03 | Shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS588840A true JPS588840A (en) | 1983-01-19 |
Family
ID=14353788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10342981A Pending JPS588840A (en) | 1981-07-03 | 1981-07-03 | Shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588840A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636390A1 (en) * | 1988-09-14 | 1990-03-16 | Peugeot | HYDROPNEUMATIC SUSPENSION CYLINDER FOR VEHICLE |
| CN102168731A (en) * | 2010-02-26 | 2011-08-31 | 翰滨企业股份有限公司 | Vibration absorber |
-
1981
- 1981-07-03 JP JP10342981A patent/JPS588840A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2636390A1 (en) * | 1988-09-14 | 1990-03-16 | Peugeot | HYDROPNEUMATIC SUSPENSION CYLINDER FOR VEHICLE |
| US5127634A (en) * | 1988-09-14 | 1992-07-07 | Automobiles Peugeot | Hydropneumatic vehicle suspension strut |
| CN102168731A (en) * | 2010-02-26 | 2011-08-31 | 翰滨企业股份有限公司 | Vibration absorber |
| WO2011103750A1 (en) * | 2010-02-26 | 2011-09-01 | 中山市法斯特贸精密五金有限公司 | Damper |
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