JPH085404Y2 - Hydraulic shock absorber - Google Patents
Hydraulic shock absorberInfo
- Publication number
- JPH085404Y2 JPH085404Y2 JP10227689U JP10227689U JPH085404Y2 JP H085404 Y2 JPH085404 Y2 JP H085404Y2 JP 10227689 U JP10227689 U JP 10227689U JP 10227689 U JP10227689 U JP 10227689U JP H085404 Y2 JPH085404 Y2 JP H085404Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- piston
- cylinder
- hole
- 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.)
- Expired - Lifetime
Links
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- Fluid-Damping Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は自動車等の車両における車体と車軸間に介装
して路面からの振動を減衰する油圧緩衝器に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hydraulic shock absorber that is interposed between a vehicle body and an axle in a vehicle such as an automobile to damp vibrations from the road surface.
一般に油圧緩衝器は最伸長の伸切時や最圧縮の底づき
時の急激な衝撃を緩和するためにバンプラバー、リバウ
ンドスプリング等のばねによる衝撃吸収部材、又はオイ
ルロツクケースや油孔桿による流体力衝撃吸収部材を上
下両方又はその一方に設けているのが普通である。Generally, a hydraulic shock absorber uses a bump rubber, a shock absorbing member such as a rebound spring, etc., or a flow due to an oil lock case or an oil rod to absorb a sudden shock at the time of maximum extension and compression and bottoming. It is usual that the physical shock absorbing members are provided on both the upper side and the lower side.
特にオリフイス等による二乗減衰力特性をもつた油圧
緩衝器では最圧縮及び最伸長時にオイルロツクを効かせ
る流体力衝撃吸収部材を備えたものはすでに開発されて
いるが、比例型減衰力特性をもつた油圧緩衝器では、オ
イルロツクを効かせる流体力衝撃吸収部材とばねによる
衝撃吸収部材とを組み合わせて使用しているものしか、
構造上の関係から開発されていない。In particular, among hydraulic shock absorbers with square damping force characteristics due to orifices, etc., those equipped with a fluid force shock absorbing member that makes the oil lock effective at the time of maximum compression and extension have already been developed, but they have a proportional damping force characteristic. In the hydraulic shock absorber, only one that uses a combination of a fluid force shock absorbing member that makes the oil lock effective and a spring shock absorbing member,
Not developed due to structural relationships.
上記比例型減衰力特性をもつた油圧緩衝器では、伸側
又は圧側の一方がばねによる衝撃吸収部材であるため、
ばねストロークが比較的大きく必要となり、また、ばね
反力が発生するため、オイルロツクによるものより性能
的に不利な面がある。In the hydraulic shock absorber having the proportional damping force characteristic, one of the extension side and the compression side is a shock absorbing member by a spring,
Since a relatively large spring stroke is required and a spring reaction force is generated, there is a disadvantage in terms of performance as compared with the oil lock.
そこで、本考案の目的は、伸切り時及び底づき時の両
方に於て、オイルロツクによる衝撃吸収が可能な比例型
減衰力特性をもつ油圧緩衝器を提供することである。Therefore, an object of the present invention is to provide a hydraulic shock absorber having a proportional damping force characteristic capable of absorbing shock by an oil lock both at the time of extension and at the time of bottoming.
上記の目的を達成するため、本考案の構成はシリンダ
内にピストンを介して中空ピストンロツドが移動自在に
挿入され、ピストンはシリンダ内に上下二つの油室を区
画し、二つの油室はピストンとピストンロツドとにそれ
ぞれ設けた通孔と通孔の途中に設けたチエツクバルブを
介して開閉され、更に二つの油室はシリンダ外部のバイ
パスとバイパスの途中に設けた比例型減衰バルブ及びチ
エツク弁を介して開閉されている比例型の減衰力特性を
もつた油圧緩衝器に於て、シリンダの上部にオイルロツ
クケースを設け、ピストンの上部外周にはこのオイルロ
ツクケースに対向するオイルロツクピースを設け、更に
シリンダの下部には中空な油孔桿を起立させ、ピストン
ロツドの中空部が油孔桿と対向し、最伸時又は最圧縮時
にオイルロツクを効かせるようにしたことを特徴とする
ものである。In order to achieve the above object, the structure of the present invention is such that a hollow piston rod is movably inserted into a cylinder via a piston, and the piston defines two upper and lower oil chambers in the cylinder, and the two oil chambers are connected to the piston. The piston rod is opened and closed via a through hole provided in the piston rod and a check valve provided in the middle of the through hole, and the two oil chambers are bypassed outside the cylinder and a proportional damping valve and a check valve provided in the middle of the bypass. In a hydraulic shock absorber that has a proportional damping force characteristic that is opened and closed, an oil lock case is provided on the upper part of the cylinder, and an oil lock piece facing the oil lock case is provided on the outer periphery of the upper part of the piston. Furthermore, a hollow oil hole rod is erected in the lower part of the cylinder, and the hollow part of the piston rod faces the oil hole rod, and the oil lock is effective when fully extended or compressed. That the the cause is characterized in.
最伸長近くではオイルロツクピースがオイルロツクケ
ースに嵌合してオイルロツク圧を発生し、最圧縮近くで
はピストンロツドの中空部が油孔桿に嵌合してオイルロ
ツク圧を発生し、伸縮時にバイパスを流れる油が比例型
減衰バルブを開いて比例型の減衰力特性による減衰力が
発生する。Near the maximum extension, the oil lock piece fits into the oil lock case to generate the oil lock pressure, and near the maximum compression, the hollow part of the piston rod fits into the oil hole rod to generate the oil lock pressure. Oil opens the proportional damping valve to generate damping force due to the proportional damping force characteristic.
以下本考案の実施例を第１図、第２図にもとづいて説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
シリンダ１内にピストン３を介して中空ピストンロツ
ド２が移動自在に挿入され、ピストン３はシリンダ１内
に上下二つの油室4,5が区画され、二つの油室4,5はピス
トン３に設けたポート６とピストンロツド２に設けたポ
ート７とピストンロツド２のリザーバたる中空部８を介
して連通し、ポート６の出口端にはチエツク弁９が開閉
自在に設けられている。The hollow piston rod 2 is movably inserted into the cylinder 1 through the piston 3, and the piston 3 has two upper and lower oil chambers 4 and 5 defined in the cylinder 1. The two oil chambers 4 and 5 are provided in the piston 3. Further, the port 6 and the port 7 provided in the piston rod 2 communicate with each other through a hollow portion 8 which is a reservoir of the piston rod 2, and a check valve 9 is openably and closably provided at the outlet end of the port 6.
シリンダ１の上端にはオイルロツクケース10が結合さ
れ、シリンダ１の下部にはボトム11が設けられ、シリン
ダ１の外側には同芯のアウターチユーブ12が設けられ、
オイルロツクケース10の上方にはこれと一体のバルブケ
ース13が設けられている。An oil lock case 10 is coupled to the upper end of the cylinder 1, a bottom 11 is provided at the lower part of the cylinder 1, and a concentric outer tube 12 is provided outside the cylinder 1.
Above the oil lock case 10, a valve case 13 integral with the oil lock case 10 is provided.
シリンダ１の下方には中空な油孔桿19が起立し、この
油孔桿19はピストンロツド２の中空部８と対向してい
る。A hollow oil hole rod 19 stands below the cylinder 1, and the oil hole rod 19 faces the hollow portion 8 of the piston rod 2.
オイルロツクケース10内に圧力室14と通孔22を設け、
バルブケース13内には油室15と通孔23を形成し、シリン
ダ１とアウターチユーブ12間に環状の油溜室16を設け、
ボトム11に通路17,18を設け、油孔桿19には下部油室５
に開口する中空部20を設け、圧力室14と通孔22と油室15
と通孔23と油溜室16と通路17,18と中空部20とで上下の
油室4,5を連通するバイパス24を構成し、ピストンロツ
ド２の伸縮時に上下二つの油室の油はこのバイパス24を
介して一方向のみに環流する。即ち、本考案の油圧緩衝
器の油の流れは一方向流れである。The pressure chamber 14 and the through hole 22 are provided in the oil lock case 10,
An oil chamber 15 and a through hole 23 are formed in the valve case 13, and an annular oil reservoir chamber 16 is provided between the cylinder 1 and the outer tube 12.
The bottom 11 is provided with passages 17 and 18, and the oil hole rod 19 is provided with a lower oil chamber 5.
A hollow portion 20 that opens to the pressure chamber 14, the through hole 22, and the oil chamber 15 is provided.
The through hole 23, the oil reservoir 16, the passages 17 and 18, and the hollow portion 20 constitute a bypass 24 that connects the upper and lower oil chambers 4 and 5, and when the piston rod 2 expands and contracts, the oil in the upper and lower oil chambers is Circulates only in one direction via the bypass 24. That is, the oil flow of the hydraulic shock absorber of the present invention is a one-way flow.
ピストンロツド２の下方にはスナツプリング25を介し
てオイルロツクピース26がオイルロツクケース10に対向
して設けられ、伸長時にオイルロツクピース26がオイル
ロツクケース10内に嵌合し、圧力室14内にオイルロツク
圧を発生させて急激な衝撃を吸収緩和させている。An oil lock piece 26 is provided below the piston rod 2 so as to face the oil lock case 10 via a snap ring 25. When the oil lock piece 26 is extended, the oil lock piece 26 is fitted into the oil lock case 10 and the oil lock piece 26 is inserted into the pressure chamber 14. It generates pressure to absorb and mitigate sudden shocks.
油孔桿19は圧縮時にピストンロツド２の中空部８と嵌
合し、油孔桿19の外周の油室５下方にオイルロツク圧を
発生させて同じく急激な衝撃を吸収緩和させている。The oil hole rod 19 is fitted into the hollow portion 8 of the piston rod 2 at the time of compression, and an oil lock pressure is generated below the oil chamber 5 on the outer periphery of the oil rod rod 19 to absorb and relieve the sudden shock as well.
バルブケース13の上部にはピストンロツド２を案内す
るベアリング31とシール27が設けられ、バルブケース13
の油室15内にはベアリング31とオイルロツクケース10と
の間に支持されたスプリング29と比例型の減衰バルブ28
とが設けられている。即ち、減衰バルブ28はバイパス24
の途中たる通孔22の出口端に開閉自在に配置されると共
にスプリング29で常時閉じ方向に付勢され、スプリング
29のイニシヤル荷重に応じた比例型の減衰力特性による
減衰力を伸縮時に発生させる。A bearing 31 for guiding the piston rod 2 and a seal 27 are provided on the upper portion of the valve case 13,
A spring 29 supported between a bearing 31 and the oil lock case 10 and a proportional damping valve 28 in the oil chamber 15 of
And are provided. That is, the damping valve 28 is the bypass 24
It is placed at the outlet end of the through hole 22 in the middle of the
A damping force due to proportional damping force characteristics according to 29 initial loads is generated during expansion and contraction.
バイパス24の途中たるボトム11の通路18の出口端には
スプリング30で閉じ方向に付勢されたチエツク弁21が開
閉自在に設けられている。A check valve 21 biased in a closing direction by a spring 30 is provided at the outlet end of the passage 18 of the bottom 11 which is in the middle of the bypass 24 so as to be openable and closable.
伸長時には図に於て、ピストン３が左行し、上部油室
４の油は圧力室14、通孔22より減衰バルブ28を押し開い
て油室15に流出し、更に通孔23、通路16,17,18よりチエ
ツク弁21を開き、中空部20より下部油室５に流出する。
即ち上部油室４の油はバイパス24を介して下部油室５に
導かれる。At the time of extension, the piston 3 moves to the left in the figure, and the oil in the upper oil chamber 4 flows out into the oil chamber 15 by pushing the damping valve 28 open from the pressure chamber 14 and the through hole 22, and then the through hole 23 and the passage 16 The check valve 21 is opened from the valves 17, 17 and 18 and flows out from the hollow portion 20 into the lower oil chamber 5.
That is, the oil in the upper oil chamber 4 is guided to the lower oil chamber 5 via the bypass 24.
この際、減衰バルブ28の作用で比例型の減衰力を発生
し、最伸長近くではオイルロツクケース10にオイルロツ
クピース26が徐々に嵌合してオイルロツク圧を発生す
る。At this time, a proportional damping force is generated by the action of the damping valve 28, and the oil lock case 26 is gradually fitted into the oil lock case 10 near the maximum extension to generate the oil lock pressure.
圧縮時には図に於て、ピストン３が右行し、下部油室
５の油はピストンロツド２の中空部８と通孔７及びピス
トン３のポート６からチエツク弁９を押し開いて上部油
室４に流出し、更にピストンロツド２の侵入体積分の油
が圧力室14、通孔22より減衰バルブ28を押し開いて油室
15に流出、通孔23を経て油溜室16に至る。When compressed, the piston 3 moves to the right in the figure, and the oil in the lower oil chamber 5 pushes the check valve 9 from the hollow portion 8 of the piston rod 2, the through hole 7 and the port 6 of the piston 3 into the upper oil chamber 4. The oil, which has flown out and is in the volume of the piston rod 2 that has entered, pushes open the damping valve 28 from the pressure chamber 14 and the through hole 22 to open the oil chamber.
It flows out to 15, and reaches the oil reservoir chamber 16 through the through hole 23.
この際に減衰バルブ28で比例型の減衰力を発生させ
る。At this time, the damping valve 28 generates a proportional damping force.
最圧縮近くでは油孔桿19に中空部８が嵌合し、油孔桿
19外周とピストン３とで区画されて絞られる油室５の下
方にオイルロツク圧が発生する。Near the most compression, the hollow portion 8 fits into the oil hole rod 19,
The oil lock pressure is generated below the oil chamber 5 which is divided by the outer circumference and the piston 3 and is throttled.
第２図は伸縮時のピストンストロークとオイルロツク
圧たる減衰力の関係を示すグラフであり、グラフＡは速
度υ１の時の特性であり、グラフＢは速度υ２の時の特
性を示す。FIG. 2 is a graph showing the relationship between the piston stroke at the time of expansion and contraction and the damping force that acts as an oil lock pressure. Graph A shows the characteristics at speed v 1, and graph B shows the characteristics at speed v 2.
本考案によれば、次の効果が得られる。 According to the present invention, the following effects can be obtained.
バイパスの途中に比例型の減衰バルブを設けたか
ら、伸縮時に比例型の特性による減衰力が発生する。Since the proportional damping valve is provided in the middle of the bypass, a damping force due to the proportional characteristic is generated during expansion and contraction.
シリンダの上部にオイルロツクケースを設けてピス
トンロツド側のオイルロツクピースと対向させ、シリン
ダの下部に油孔桿を設けてピストンロツドの中空部と対
向させたから、最伸長近く、又は最圧縮近くでオイルロ
ツク圧による衝撃を吸収緩和できる。しかも、伸縮両方
に於て、油圧による衝撃緩和であるから、ばねによるも
のに比べて衝撃吸収性が向上する。Since the oil lock case is installed above the cylinder to face the oil lock piece on the piston rod side, and the oil hole rod is installed to the bottom of the cylinder to face the hollow part of the piston rod, the oil lock pressure near the maximum extension or compression is reached. The shock caused by can be absorbed and relaxed. Moreover, since the impact is relieved by the hydraulic pressure in both expansion and contraction, the impact absorption is improved as compared with the spring.
第１図は本考案の一実施例に係る油圧緩衝器の縦断正面
図、第２図にはオイルロツク圧による減衰力特性を示す
グラフである。 １……シリンダ、２……ピストンロツド、３……ピスト
ン、4,5……油室、6,7……通孔、９……チエツク弁、10
……オイルロツクケース、19……油孔桿、24……バイパ
ス、26……オイルロツクピース。FIG. 1 is a vertical sectional front view of a hydraulic shock absorber according to one embodiment of the present invention, and FIG. 2 is a graph showing damping force characteristics due to oil lock pressure. 1 ... Cylinder, 2 ... Piston rod, 3 ... Piston, 4,5 ... Oil chamber, 6,7 ... Through hole, 9 ... Check valve, 10
...... Oil lock case, 19 ...... Oil hole rod, 24 ...... Bypass, 26 ...... Oil lock piece.
Claims (1)
ンロツドが移動自在に挿入され、ピストンはシリンダ内
に上下二つの油室を区画し、二つの油室はピストンとピ
ストンロツドとにそれぞれ設けた通孔と通孔の途中に設
けたチエツクバルブを介して開閉され、更に二つの油室
はシリンダ外部のバイパスとバイパスの途中に設けた比
例型減衰バルブ及びチエツク弁を介して開閉されている
比例型の減衰力特性をもつた油圧緩衝器に於いて、シリ
ンダの上部にオイルロツクケースを設け、ピストンの上
部外周にはこのオイルロツクケースに対向するオイルロ
ツクピースを設け、更にシリンダの下部には中空な油孔
桿を起立させ、ピストンロツドの中空部が油孔桿と対向
し、最伸時又は最圧縮時にオイルロツクを効かせるよう
にした油圧緩衝器。1. A hollow piston rod is movably inserted into a cylinder via a piston, and the piston defines two upper and lower oil chambers in the cylinder. The two oil chambers are provided in the piston and the piston rod, respectively. And the two oil chambers are opened / closed via a check valve provided in the middle of the through hole, and two oil chambers are opened / closed via a bypass outside the cylinder and a proportional damping valve and a check valve provided in the middle of the bypass. In a hydraulic shock absorber with damping force characteristics, an oil lock case is provided on the upper part of the cylinder, an oil lock piece facing the oil lock case is provided on the outer circumference of the upper part of the piston, and a hollow part is provided on the lower part of the cylinder. Hydraulic shock absorber in which the oil hole rod is erected so that the hollow part of the piston rod faces the oil hole rod so that the oil lock is effective when fully extended or compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10227689U JPH085404Y2 (en) | 1989-08-31 | 1989-08-31 | Hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10227689U JPH085404Y2 (en) | 1989-08-31 | 1989-08-31 | Hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0341239U JPH0341239U (en) | 1991-04-19 |
| JPH085404Y2 true JPH085404Y2 (en) | 1996-02-14 |
Family
ID=31651182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10227689U Expired - Lifetime JPH085404Y2 (en) | 1989-08-31 | 1989-08-31 | Hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085404Y2 (en) |
-
1989
- 1989-08-31 JP JP10227689U patent/JPH085404Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0341239U (en) | 1991-04-19 |
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