JPS6132528B2 - - Google Patents
Info
- Publication number
- JPS6132528B2 JPS6132528B2 JP56014751A JP1475181A JPS6132528B2 JP S6132528 B2 JPS6132528 B2 JP S6132528B2 JP 56014751 A JP56014751 A JP 56014751A JP 1475181 A JP1475181 A JP 1475181A JP S6132528 B2 JPS6132528 B2 JP S6132528B2
- Authority
- JP
- Japan
- Prior art keywords
- annular plate
- plate valve
- valve
- annular
- oil
- 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
- 238000013016 damping Methods 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 230000035939 shock Effects 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 230000008602 contraction Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 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
- F16F9/52—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 in case of change of temperature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Fluid-Damping Devices (AREA)
Description
【発明の詳細な説明】
本発明は車両等の油圧緩衝器の減衰力発生装
置、特に温度変化があつても常に一定の減衰力を
発生することのできる減衰力発生装置に関するも
のである。従来のこの種油圧緩衝器においては温
度変化に伴ないシリンダー内に封入された油の粘
性係数の変化あるいは諸部品の熱膨張等により減
衰力が変化するため、種々の対策が講じられてい
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damping force generating device for a hydraulic shock absorber for a vehicle, etc., and particularly to a damping force generating device that can always generate a constant damping force even when there is a temperature change. In conventional hydraulic shock absorbers of this kind, the damping force changes due to changes in the viscosity coefficient of the oil sealed in the cylinder due to temperature changes, thermal expansion of various parts, etc., so various measures have been taken.
本発明は環状板バルブを用いる形式の油圧緩衝
器について、使用中に温度が上昇し油の粘度変化
や諸部品の熱膨張があつても、一定の減衰力を得
ることができる簡便確実な手段を提供するもの
で、その要旨はバルブストツパの環状板バルブに
対向する面に設けられた環状の凹溝と該凹溝に充
填された熱膨張性の大きい物質と該凹溝の開放端
に摺動自在に嵌合された前記環状板バルブの屈曲
量を規制するためのプランジヤを備えていること
を特徴とする減衰力発生装置にある。 The present invention relates to a hydraulic shock absorber using an annular plate valve, and provides a simple and reliable means for obtaining a constant damping force even when the temperature rises during use, the viscosity of the oil changes, and the thermal expansion of various parts occurs. The gist of the valve stopper is to provide an annular groove provided on the surface facing the annular plate valve of the valve stopper, a material with high thermal expansion filled in the groove, and a material that slides on the open end of the groove. The damping force generating device is characterized in that it includes a plunger for regulating the amount of bending of the annular plate valve that is freely fitted.
本発明を一実施例である図面に基づいて詳述す
る。 The present invention will be explained in detail based on the drawings which are one embodiment.
環状板バルブを用いる形式の油圧緩衝器をまず
第１図に基づいて説明すると（第１図は本発明の
実施例である）プランジヤ１８、凹溝１９と該凹
溝１９に充填された熱膨張性の大きい物質を除け
ば公知のものであるのでこの図面を用いて説明す
る。まず１はシリンダーであり例えば車体が取り
付けられる。２は例えば車軸が取りつけられるロ
ツドでありシリンダー１に固定されたオイルシー
ル３、ロツドガイド４、Ｏリング５を介して摺動
自在在にシリンダーに嵌挿されている。ロツド上
端部にはバネ受け６、ピストン７環状板バルブ８
バルブシート９バルブストツパー１０が順に固定
されており、ピストン７はピストンリング２０に
よりシリンダー１の内面を摺動可能であると共に
シリンダー１を２分し油室Ａ油室Ｂを構成してい
る。またピストン７には２つの油孔１１，１２が
設けられており油孔１２の上端開口は、ばね１３
によつて付勢されたバルブ１４によつて塞がれて
いる。油孔１１は下端開口端が通常前記環状板バ
ルブ８によつて塞がれている。更にピストンの下
部は前記環状板バルブのための内側弁座１５外側
弁座１６となつている。１０は環状板バルブ８の
屈曲量を規制するバルブストツパーである。なお
１７は気体室である。 First, a hydraulic shock absorber using an annular plate valve will be explained based on FIG. 1 (FIG. 1 shows an embodiment of the present invention). Since these substances are well-known except for substances with high properties, they will be explained using this drawing. First, numeral 1 is a cylinder to which, for example, a car body is attached. Reference numeral 2 denotes a rod to which, for example, an axle is attached, and is slidably inserted into the cylinder via an oil seal 3 fixed to the cylinder 1, a rod guide 4, and an O-ring 5. At the upper end of the rod there is a spring receiver 6, a piston 7, an annular plate valve 8
A valve seat 9 and a valve stopper 10 are fixed in order, and the piston 7 is slidable on the inner surface of the cylinder 1 by means of a piston ring 20, and divides the cylinder 1 into two to form an oil chamber A and an oil chamber B. Also, the piston 7 is provided with two oil holes 11 and 12, and the upper end opening of the oil hole 12 is connected to the spring 13.
It is closed off by a valve 14 energized by. The lower open end of the oil hole 11 is normally closed by the annular plate valve 8. Furthermore, the lower part of the piston forms an inner valve seat 15 and an outer valve seat 16 for the annular plate valve. 10 is a valve stopper for regulating the amount of bending of the annular plate valve 8. Note that 17 is a gas chamber.
このような公知の油圧緩衝器は縮み工程では油
室Ａの容積が減少すると油圧で環状板バルブ８が
屈曲し該環状板バルブ８と外側弁座１６との隙間
より油が流れる。この場合環状板バルブ８の最大
屈曲量はバルブストツパー１０によつて規制され
ている。また伸び工程では油室Ｂの容積が減少し
て油室Ｂの油圧が高くなりバネ１３に抗してバル
ブ１４が上昇し油孔１２を通つて油室Ａに油が流
れる。このような油の流ねれにおいて装置全体の
温度が上昇し油の粘度が低下しても外圧等による
縮み工程における環状板バルブ８の屈曲量は変化
しないため粘度が低下したぶんだけ油が流れやす
くなる。このことは減衰力が低下したことを意味
する。全体の温度が低い場合、例えば冬などの始
動時には逆に減衰力が大きくなることになる。 In such a known hydraulic shock absorber, when the volume of the oil chamber A decreases during the contraction process, the annular plate valve 8 is bent by the hydraulic pressure, and oil flows from the gap between the annular plate valve 8 and the outer valve seat 16. In this case, the maximum amount of bending of the annular plate valve 8 is regulated by a valve stopper 10. Further, in the extension process, the volume of the oil chamber B decreases, the oil pressure in the oil chamber B increases, the valve 14 rises against the spring 13, and oil flows into the oil chamber A through the oil hole 12. In such oil flowing, even if the temperature of the entire device rises and the viscosity of the oil decreases, the amount of bending of the annular plate valve 8 during the contraction process due to external pressure etc. does not change, so the oil flows only as much as the viscosity decreases. It becomes easier. This means that the damping force has decreased. If the overall temperature is low, the damping force will conversely increase when starting, such as in winter.
本発明は温度によるこのような減衰力の変化を
防止するために環状板バルブ８の屈曲量を規制す
るプランジヤ１８を設け該プランジヤ１８は凹溝
１９に充填された熱膨張性の大きい物質が温度変
化によつて膨張収縮するに従つて上下動するよう
に構成したものである。 In order to prevent such changes in damping force due to temperature, the present invention is provided with a plunger 18 that regulates the amount of bending of the annular plate valve 8. It is configured to move up and down as it expands and contracts due to changes.
本発明に従つて環状板バルブ８の屈曲量を調節
する機構を第１図の要部拡大図である第２図に基
づいて更に説明する。 A mechanism for adjusting the amount of bending of the annular plate valve 8 according to the present invention will be further explained based on FIG. 2, which is an enlarged view of the main part of FIG. 1.
本発明の油圧緩衝器の減衰力発生装置はバルブ
ストツパー１０の環状板バルブ８と対向する面に
凹溝１９が設けられており該凹溝１９中には熱膨
張性の大きい物質、例えばアルコール、オイル、
グリス、樹脂、ガス等が充填されている。 In the damping force generating device for a hydraulic shock absorber according to the present invention, a groove 19 is provided on the surface of the valve stopper 10 facing the annular plate valve 8. ,oil,
Filled with grease, resin, gas, etc.
凹溝１９にはプランジヤ１８が、プランジヤリ
ング２２を介して摺動自在に嵌挿されておりプラ
ンジヤ１８は熱膨張性の大きい物質の熱膨張、熱
収縮に応じて凹溝１９内を上下摺動する。またプ
ランジヤ１８には好適には突起２１が設けられて
いる。さて前述の如く緩衝器の縮み工程において
油がＡ室より油孔１１を通つてＢ室に流れる場
合、環状板バルブ８はバルブシート９の端部Ｘを
支点として屈曲する。そして通常は環状板バルブ
８と外側弁座１６との間隔は環状板バルブ８がバ
ルブストツパー１０に衝止することによつて規制
されるが本発明の場合、使用中に温度が上昇する
と熱膨張性の大きい物質が膨張し、よつてプラン
ジヤ１８が上昇するため環状板バルブ８はプラン
ジヤ１８によつて防止しその屈曲許容量が減少す
ることになる。即ち、環状板バルブ８と外側弁座
１６との間隔が狭くなりその結果油のＡ室→Ｂ室
の流れ抵抗が増大する。そして温度が上昇したこ
とによつて油の粘度が低下し、その結果油の流れ
抵抗が低下するという従来の欠点を相殺すること
になる。また温度が低下した場合は逆の現象が生
ずるから緩衝器を使用中に温度が変化しても一定
の減衰力を維持することができる。 A plunger 18 is slidably inserted into the groove 19 via a plunger ring 22, and the plunger 18 slides up and down in the groove 19 in response to thermal expansion and thermal contraction of a material with high thermal expansion property. do. The plunger 18 is also preferably provided with a protrusion 21 . Now, as described above, when oil flows from chamber A to chamber B through the oil hole 11 during the shock absorber contraction process, the annular plate valve 8 bends around the end X of the valve seat 9 as a fulcrum. Normally, the distance between the annular plate valve 8 and the outer valve seat 16 is regulated by the annular plate valve 8 hitting the valve stopper 10, but in the case of the present invention, when the temperature rises during use, the distance between the annular plate valve 8 and the outer valve seat 16 is regulated. Since the highly expandable substance expands and the plunger 18 rises, the annular plate valve 8 is prevented by the plunger 18 and its bending capacity is reduced. That is, the distance between the annular plate valve 8 and the outer valve seat 16 becomes narrower, and as a result, the flow resistance of oil from chamber A to chamber B increases. This offsets the conventional disadvantage that the increased temperature lowers the viscosity of the oil, resulting in lower oil flow resistance. Further, when the temperature decreases, the opposite phenomenon occurs, so that a constant damping force can be maintained even if the temperature changes while the buffer is in use.
またプランジヤ１８に突起２１を設けておく
と、プランジヤ１８が上昇して突起２１が環状板
バルブ８に接触した場合は環状板バルブ８の屈曲
支点が、バルブシート９の端部Ｘから該突起の端
部X′に移動することになり環状板バルブ８の屈
曲抵抗が大きくなるから縮み工程において環状板
バルブ８と外側弁座１６との間隔が小さくなり、
油の流れ抵抗が増大するし、突起２１と環状板バ
ルブ８の間に間隔△Ｌが存在する場合は前述の如
くプランジヤ１８自体が環状板バルブ８のストツ
パーの作用を果すことになる。従つて突起２１と
環状板バルブ８との間隔△Ｌを適当に設定するこ
とにより油がＡ室→Ｂ室へ流れる際の抵抗は熱膨
張性の大きい物質の膨張の程度によつて環状板バ
ルブ８の屈曲量（即ち環状板バルブ８と外側弁座
１６とのなす間隔）がプランジヤによつて規制さ
れる場合と、環状板バルブ８の屈曲支点がＸ―
X′に変化して該板バルブ８が大きな屈曲抵抗を
示すことにより環状板バルブ８と外側弁座１６と
の間隔が小さくなる場合の２つの減衰力調節機能
を有することができる。 Further, by providing a protrusion 21 on the plunger 18, when the plunger 18 rises and the protrusion 21 contacts the annular plate valve 8, the bending fulcrum of the annular plate valve 8 moves from the end X of the valve seat 9 to the protrusion. As it moves to the end X', the bending resistance of the annular plate valve 8 increases, so the distance between the annular plate valve 8 and the outer valve seat 16 becomes smaller during the contraction process.
The oil flow resistance increases, and if the distance ΔL exists between the protrusion 21 and the annular plate valve 8, the plunger 18 itself acts as a stopper for the annular plate valve 8 as described above. Therefore, by appropriately setting the distance ΔL between the protrusion 21 and the annular plate valve 8, the resistance when oil flows from chamber A to chamber B is determined by the degree of expansion of the substance with high thermal expansion. 8 (that is, the distance between the annular plate valve 8 and the outer valve seat 16) is regulated by the plunger, and the case where the bending fulcrum of the annular plate valve 8 is
When the distance between the annular plate valve 8 and the outer valve seat 16 becomes smaller due to the plate valve 8 exhibiting a large bending resistance when changing to X', two damping force adjustment functions can be provided.
以上の如く本発明は環状板バルブを用いる形式
の油圧緩衝器について簡便な手段により確実に温
度変化に伴なう減衰力の変化を防止することがで
きる。 As described above, the present invention can reliably prevent changes in damping force due to temperature changes using a simple means for a hydraulic shock absorber using an annular plate valve.
第１図は本発明の油圧緩衝器を示す断面図、第
２図はその要部拡大図である。
１……シリンダー、２……ロツド、７……ピス
トン、８……環状板バルブ、１０……バルブスト
ツパー、１８……プランジヤ、２１……突起。
FIG. 1 is a sectional view showing the hydraulic shock absorber of the present invention, and FIG. 2 is an enlarged view of the main parts thereof. 1... Cylinder, 2... Rod, 7... Piston, 8... Annular plate valve, 10... Valve stopper, 18... Plunger, 21... Projection.
Claims (1)
ドの端部に該シリンダーに対して摺動自在なよう
に嵌合された油孔を備えたピストン、該油孔を開
閉するための環状板バルブ、該環状板バルブより
小径の環状バルブシート、バルブストツパーを順
に配設した油圧緩衝器において、前記バルブスト
ツパーの前記環状板バルブに対向する面に設けら
れた環状の凹溝と、該凹溝に充填された熱膨張性
の大きい物質と、該凹溝の開放端に摺動自在に嵌
合された前記環状板バルブの屈曲量を規制するた
めのプランジヤとを備え、前記プランジヤの環状
板バルブに対向する面に、該板バルブと接触しう
る突起を設けたことを特徴とする減衰力発生装
置。1. A piston into which a rod is inserted from the outside of the cylinder, and an oil hole fitted to the end of the rod so as to be slidable relative to the cylinder; an annular plate valve for opening and closing the oil hole; In a hydraulic shock absorber in which an annular valve seat having a diameter smaller than that of an annular plate valve and a valve stopper are arranged in this order, an annular groove provided in a surface of the valve stopper facing the annular plate valve, and an annular groove in the groove. The annular plate valve is provided with a material filled with a material having a high thermal expansion property, and a plunger for regulating the amount of bending of the annular plate valve, which is slidably fitted into the open end of the groove, and the annular plate valve of the plunger is A damping force generating device characterized in that a protrusion that can come into contact with the plate valve is provided on an opposing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1475181A JPS57129910A (en) | 1981-02-03 | 1981-02-03 | Damping force causing device for hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1475181A JPS57129910A (en) | 1981-02-03 | 1981-02-03 | Damping force causing device for hydraulic buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57129910A JPS57129910A (en) | 1982-08-12 |
| JPS6132528B2 true JPS6132528B2 (en) | 1986-07-28 |
Family
ID=11869808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1475181A Granted JPS57129910A (en) | 1981-02-03 | 1981-02-03 | Damping force causing device for hydraulic buffer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57129910A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2538468A1 (en) * | 1982-12-22 | 1984-06-29 | Petroles Cie Francaise | HYDRAULIC SHOCK ABSORBER IN PARTICULAR FOR UNDERWATER EQUIPMENT |
| JPH0198944U (en) * | 1987-12-24 | 1989-07-03 | ||
| US6619182B2 (en) | 2001-04-25 | 2003-09-16 | Delaware Capital Formation, Inc. | Flow control device |
| JP2017015244A (en) * | 2015-06-30 | 2017-01-19 | 日立オートモティブシステムズ株式会社 | Cylinder device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5556941U (en) * | 1978-10-12 | 1980-04-17 |
-
1981
- 1981-02-03 JP JP1475181A patent/JPS57129910A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57129910A (en) | 1982-08-12 |
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