JPS6317872Y2 - - Google Patents
Info
- Publication number
- JPS6317872Y2 JPS6317872Y2 JP321383U JP321383U JPS6317872Y2 JP S6317872 Y2 JPS6317872 Y2 JP S6317872Y2 JP 321383 U JP321383 U JP 321383U JP 321383 U JP321383 U JP 321383U JP S6317872 Y2 JPS6317872 Y2 JP S6317872Y2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- inner cylinder
- piston rod
- port
- partition member
- 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
- 238000005192 partition Methods 0.000 claims description 30
- 238000013016 damping Methods 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 13
- 239000006096 absorbing agent Substances 0.000 description 17
- 230000035939 shock Effects 0.000 description 17
- 238000006073 displacement reaction Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Description
【考案の詳細な説明】
本考案は液圧緩衝器に関し、更に詳しくは、内
筒と該内筒から径方向の外方へ間隔をおいて配置
される外筒とを備え、ピストンロツドの伸び時に
減衰力を発生する弁をピストンに、縮み時に減衰
力を発生する弁を内筒の下部にそれぞれ有する液
圧緩衝器に関する。[Detailed Description of the Invention] The present invention relates to a hydraulic shock absorber, and more particularly, the present invention relates to a hydraulic shock absorber, which includes an inner cylinder and an outer cylinder spaced apart from the inner cylinder in the radial direction. The present invention relates to a hydraulic shock absorber having a valve that generates damping force in the piston and a valve that generates damping force when compressed in the lower part of the inner cylinder.
一般に、自動車のサスペンシヨン用の液圧緩衝
器は、ピストンロツドの移動速度が小さいときに
は液体をオリフイスを通して流動させ、減衰力を
発生するようにしている。しかし、液圧緩衝器が
減衰力を発生することは、その反力が必ず液圧緩
衝器の支持体、例えば、車体へ伝わる結果をもた
らすこととなる。そのため、液圧緩衝器のばね下
荷重である車輪のどんな微少変位に対しても減衰
力が発生すると、必ず車体へ反力が伝わり、ゴツ
ゴツした不快な感じを乗員に与えることとなる。 Generally, hydraulic shock absorbers for automobile suspensions generate damping force by causing liquid to flow through an orifice when the piston rod is moving at a low speed. However, when a hydraulic shock absorber generates a damping force, the reaction force is necessarily transmitted to a support of the hydraulic shock absorber, such as a vehicle body. Therefore, if a damping force is generated for any minute displacement of the wheel, which is the unsprung load of the hydraulic shock absorber, a reaction force will always be transmitted to the vehicle body, giving the occupants a rough and uncomfortable feeling.
従つて、本考案の目的は微少変位に対しては減
衰力を発生せず、変位が所定の大きさ以上になつ
てはじめて減衰力を発生する液圧緩衝器を提供す
ることある。 Therefore, an object of the present invention is to provide a hydraulic shock absorber that does not generate a damping force for minute displacements, but generates a damping force only when the displacement exceeds a predetermined magnitude.
本考案は内筒と、該内筒から径方向の外方へ間
隔をおいて配置される外筒と、前記内筒から上方
の端部を外部へ突出させたピストンロツドと、前
記内筒の下部に配置され、前記ピストンロツドの
縮み時に減衰力を発生する弁とを備える液圧緩衝
器であつて、前記内筒の内部に液密状態で滑動可
能に配置され、前記ピストンロツドの下方の端部
を連結するピストンであつて空間と前記内筒の軸
線方向に開けられ、前記空間に開口するポートと
を有するピストンと、該ピストンの前記空間内に
配置され、該ピストンに対して限られた範囲で前
記内筒の軸線方向へ移動可能な仕切部材であつて
前記ピストンロツドの伸び時に液体が流動する第
１のポートと縮み時に液体が流動する第２のポー
トとを有する仕切部材と、該仕切部材の下側に配
置され、前記第１のポートの下端に向けて偏倚さ
れる第１の弁体と、前記仕切部材の上側に配置さ
れ、前記第２のポートの上端を開閉する第２の弁
体とを含む。 The present invention includes an inner cylinder, an outer cylinder disposed radially outward from the inner cylinder at a distance, a piston rod whose upper end projects outward from the inner cylinder, and a lower part of the inner cylinder. A hydraulic shock absorber is provided with a valve that is disposed in the piston rod and that generates a damping force when the piston rod is compressed, the hydraulic shock absorber is disposed in a liquid-tight manner and slidably inside the inner cylinder, and is arranged so as to be slidable in a fluid-tight manner inside the inner cylinder, and the hydraulic shock absorber is provided with a valve that generates a damping force when the piston rod is compressed. A connecting piston having a space and a port opened in the axial direction of the inner cylinder and opening into the space; a partition member movable in the axial direction of the inner cylinder, the partition member having a first port through which liquid flows when the piston rod is extended and a second port through which liquid flows when the piston rod retracts; a first valve body disposed on the lower side and biased toward the lower end of the first port; and a second valve body disposed on the upper side of the partition member for opening and closing the upper end of the second port. including.
ばね下荷重の微少な変位が生ずると、まず仕切
部材がピストンに対して微少量の相対変位をす
る。仕切部材のこの変位の間には何らの減衰力も
発生しない。ばね下荷重の変位がこのままなくな
ると、支持体、例えば車体への反力は全く生じな
い。ばね下荷重の変位が更に大きくなると、第１
のポートと第１の弁体との共働により、又は内筒
の下部の弁の作用により、減衰力を発生する。 When a slight displacement of the unsprung load occurs, the partition member first undergoes a slight relative displacement with respect to the piston. No damping forces occur during this displacement of the partition member. If the displacement of the unsprung load disappears as it is, no reaction force will be generated on the support body, for example, the vehicle body. If the displacement of the unsprung load becomes even larger, the first
A damping force is generated by the cooperation of the port and the first valve body or by the action of the valve at the lower part of the inner cylinder.
以下に、図面を参照して本考案の実施例につい
て説明する。 Embodiments of the present invention will be described below with reference to the drawings.
本考案の液圧緩衝器は第１図に示すように、内
筒１０と、この内筒１０から径方向の外方へ間隔
をおいて同心状に配置される外筒１２とを備え、
前記間隔を液体のリザーバ室１４としたタイプで
ある。このタイプの液圧緩衝器はピストンロツド
１６の伸び時に減衰力を発生する弁をピストン１
８に、ピストンロツド１６の縮み時に減衰力を発
生する弁を内筒１０の下部にそれぞれ備える。 As shown in FIG. 1, the hydraulic shock absorber of the present invention includes an inner cylinder 10 and an outer cylinder 12 arranged concentrically at a distance from the inner cylinder 10 outward in the radial direction.
This is a type in which the above-mentioned interval is used as a liquid reservoir chamber 14. This type of hydraulic shock absorber uses a valve that generates a damping force when the piston rod 16 is extended.
At 8, valves for generating a damping force when the piston rod 16 is compressed are provided at the lower part of the inner cylinder 10, respectively.
ピストン１８は内筒１０の内部に滑動可能に配
置される。このピストン１８は下端からくり抜か
れた空間２０と、内筒１０の軸線方向に開けら
れ、空間２０に開口する複数のポート２２とを有
する。ピストン１８は更に外周にピストンバンド
２４を備え、ピストン１８上方の液室２６と、下
方の液室２８とを液密に保つ。このピストン１８
にピストンロツド１６の下方の端部が連結され
る。ピストンロツド１６の上方の端部（図示せ
ず）は内筒１０から外部へ突出する。 Piston 18 is slidably disposed inside inner cylinder 10 . This piston 18 has a space 20 hollowed out from its lower end, and a plurality of ports 22 that are opened in the axial direction of the inner cylinder 10 and open into the space 20. The piston 18 is further provided with a piston band 24 on its outer periphery to keep a liquid chamber 26 above the piston 18 and a liquid chamber 28 below it liquid-tight. This piston 18
The lower end of the piston rod 16 is connected to the piston rod 16. An upper end (not shown) of the piston rod 16 projects outwardly from the inner cylinder 10.
仕切部材３０はピストン１８の空間２０内に配
置される。この仕切部材３０は液圧緩衝器の使用
中に、この仕切部材３０に働く最大の液圧による
力によつて変形しない剛性を備える部材によつ
て、円板状に形成されている。仕切部材３０はピ
ストンロツド１６の伸び時に液体が流動する複数
の第１のポート３２と、ピストンロツド１６の縮
み時に流体が流動する複数の第２のポート３４と
を有する。 The partition member 30 is arranged within the space 20 of the piston 18. The partition member 30 is formed into a disk shape and is made of a rigid member that will not be deformed by the force of the maximum hydraulic pressure acting on the partition member 30 during use of the hydraulic shock absorber. The partition member 30 has a plurality of first ports 32 through which fluid flows when the piston rod 16 is extended, and a plurality of second ports 34 through which fluid flows when the piston rod 16 retracts.
ピストン１８の下端から空間２０に支持部３６
が設けられており、この支持部３６に仕切部材３
０を挿し込み、六角孔付ナツト３８を支持部３６
にねじ込んで、仕切部材３０はピストン１８に取
り付けられ、２つの液室２６，２８を仕切つてい
る。この場合、仕切部材３０の外径と支持部３６
の内径とは動きばめの関係となり、しかも両者の
間を通つて液体が実質的に漏れることがないよう
に定められる。そして、ナツト３８の締付けは、
仕切部材３０が限られた範囲（l1＋l2）で、肩３
７とナツト３８との間を内筒１０の軸線方向へ移
動できるように調節する。この場合の範囲は路面
の微少は凹凸に対する弁体の動きの大きさを勘案
して定める。 A support portion 36 extends from the lower end of the piston 18 to the space 20.
is provided, and the partition member 3 is attached to this support portion 36.
0, and tighten the hexagon socket nut 38 to the support part 36.
The partition member 30 is screwed into the piston 18 and partitions the two liquid chambers 26, 28. In this case, the outer diameter of the partition member 30 and the support portion 36
The inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the inner diameter of the outer diameter diameter 1. Then, tightening the nut 38 is as follows:
The partition member 30 has a limited range (l 1 +l 2 ), and the shoulder 3
7 and the nut 38 so as to be movable in the axial direction of the inner cylinder 10. In this case, the range is determined by taking into consideration the magnitude of movement of the valve body with respect to minute irregularities on the road surface.
第１の弁体４０は板ばねによつて環状に形成さ
れ、仕切部材３０の下側に配置される。第２の弁
体４２は板材によつて環状に形成され、仕切部材
３０の上側に配置される。第１の弁体４０は仕切
部材３０を貫通するボルト４４及びナツト４５に
よつて仕切部材３０に固定され、それ自体の弾性
によつて第１のポート３２の下端に向けて偏倚す
る。この第１の弁体４０と第１のポート３２とは
伸び時に減衰力を発生する弁を構成する。他方、
第２の弁体４２はボルト４４の軸線方向へ移動可
能にボルト４４に取り付けられ、第２のポート３
４の上端を開閉する。第２の弁体４２の上方にス
トツパ４６が配置され、弁体４２の上方への移動
はこのストツパ４６によつて抑止される。ストツ
パ４６と第２の弁体４２との間にばね定数の小さ
なばね４８を配置することが好ましい。第２の弁
体４２の第２のポート３４とはピストンロツド１
６の縮み時に液体の流動を許し、伸び時に流動を
遮断する逆止弁であり、この場合、ばね４８は弁
体４２の振動を防止するにとどまり、減衰力を発
生しない。 The first valve body 40 is formed into an annular shape by a plate spring, and is arranged below the partition member 30. The second valve body 42 is formed of a plate material into an annular shape, and is arranged above the partition member 30. The first valve body 40 is fixed to the partition member 30 by a bolt 44 and a nut 45 passing through the partition member 30, and is biased toward the lower end of the first port 32 by its own elasticity. The first valve body 40 and the first port 32 constitute a valve that generates a damping force when extended. On the other hand,
The second valve body 42 is attached to the bolt 44 so as to be movable in the axial direction of the bolt 44, and is attached to the second port 3.
Open and close the upper end of 4. A stopper 46 is disposed above the second valve body 42, and the stopper 46 prevents the valve body 42 from moving upward. It is preferable to arrange a spring 48 with a small spring constant between the stopper 46 and the second valve body 42. The second port 34 of the second valve body 42 is connected to the piston rod 1.
6 is a check valve that allows liquid to flow when it contracts and blocks the flow when it expands. In this case, the spring 48 only prevents the vibration of the valve body 42 and does not generate a damping force.
内筒１０の下部に、第３のポート５２と複数の
第４のポート５４とを有するベースバルブ本体５
０が固定されている。このベースバルブ本体５０
の下側に第３の弁体５６が配置され、ばね５８に
よつて第３のポート５２の下端に向けて偏倚され
ている。第３の弁体５６と第３のポート５２とは
それ自体公知の、縮み時に減衰力を発生する弁を
構成する。第４のポート５４はその上端が第４の
弁体６０によつて開閉される。弁体６０はばね定
数の小さいばね６２によつて支えられることが好
ましい。第４の弁体６０と第４のポート５４とは
ピストンロツド１６の伸び時のみに液体の流動を
許容する逆止弁である。 A base valve body 5 having a third port 52 and a plurality of fourth ports 54 at the bottom of the inner cylinder 10.
0 is fixed. This base valve body 50
A third valve body 56 is disposed below and biased toward the lower end of the third port 52 by a spring 58 . The third valve body 56 and the third port 52 constitute a valve which is known per se and which generates a damping force when retracted. The fourth port 54 is opened and closed at its upper end by a fourth valve body 60. Preferably, the valve body 60 is supported by a spring 62 having a small spring constant. The fourth valve body 60 and the fourth port 54 are check valves that allow liquid to flow only when the piston rod 16 is extended.
内筒１０の内部及びリザーバ室１４の下部に液
体、例えば油を充填し、液圧緩衝器の外筒をばね
下荷重である車輪の支持部（図示せず）に、ピス
トンロツドをばね上荷重である車体（図示せず）
にそれぞれ装着する。自動車の走行中に、車輪の
支持部が例えば伸び方向へ微少変位すると、仕切
部材３０がピストン１８に対して下方へ移動す
る。この移動の間には減衰力を発生しない。更に
変位が大きくなつて、仕切部材３０がナツト３８
に突き当たると、仕切部材３０はそれ以上移動で
きなくなり、液室２６内の圧力によつて第１の弁
体４０が下方へ押し下げられ、油が第１のポート
３２を通つて流動し、減衰力を発生する。前記と
は逆に、車輪の支持部が縮み方向へ微少変位する
と、仕切部材３０は上方へ移動する。そして仕切
部材３０が上方への移動限界位置に達すると、第
３のポート５２と第３の弁体５６とによつて減衰
力を発生する。 The inside of the inner cylinder 10 and the lower part of the reservoir chamber 14 are filled with liquid, for example, oil, and the outer cylinder of the hydraulic shock absorber is mounted on a wheel support (not shown) with an unsprung load, and the piston rod is placed with a sprung load. A vehicle body (not shown)
be attached to each. When the wheel support section is slightly displaced, for example, in the direction of extension while the automobile is running, the partition member 30 moves downward relative to the piston 18. No damping force is generated during this movement. As the displacement further increases, the partition member 30 becomes attached to the nut 38.
When it hits the partition member 30, the partition member 30 cannot move any further, the pressure in the liquid chamber 26 pushes the first valve body 40 downward, and the oil flows through the first port 32, causing a damping force. occurs. Contrary to the above, when the wheel support portion is slightly displaced in the contraction direction, the partition member 30 moves upward. When the partition member 30 reaches its upward movement limit position, a damping force is generated by the third port 52 and the third valve body 56.
本考案によれば、ばね下荷重の微少な変位があ
つても減衰力を発生しない。従つて、本考案に係
る液圧緩衝器を自動車のサスペンシヨンに設置す
ると、走行時のゴツゴツ感を取り除くことができ
る。 According to the present invention, no damping force is generated even if there is a slight displacement of the unsprung load. Therefore, when the hydraulic shock absorber according to the present invention is installed in the suspension of an automobile, the bumpy feeling during driving can be eliminated.
第１図は本考案に係る液圧緩衝器の要部を示す
断面図、第２図はピストンと仕切部材との接続部
の断面図で、仕切部材は中立の位置にある状態を
示す。
１０：内筒、１２：外筒、１６：ピストンロツ
ド、１８：ピストン、２０：空間、２２，３２，
３４，５２，５４：ポート、３０：仕切部材、４
０，４２，５６，６０：弁体。
FIG. 1 is a cross-sectional view showing the main parts of the hydraulic shock absorber according to the present invention, and FIG. 2 is a cross-sectional view of the connection between the piston and the partition member, with the partition member in a neutral position. 10: Inner cylinder, 12: Outer cylinder, 16: Piston rod, 18: Piston, 20: Space, 22, 32,
34, 52, 54: port, 30: partition member, 4
0, 42, 56, 60: Valve body.
Claims (1)
て配置される外筒と、前記内筒から上方の端部を
外部へ突出させたピストンロツドと、前記内筒の
下部に配置され、前記ピストンロツドの縮み時に
減衰力を発生する弁とを備える液圧緩衝器であつ
て、前記内筒の内部に液密状態で滑動可能に配置
され、前記ピストンロツドの下方の端部を連結す
るピストンであつて空間と前記内筒の軸線方向に
開けられ、前記空間に開口するポートとを有する
ピストンと、該ピストンの前記空間内に配置さ
れ、該ピストンに対して限られた範囲で前記内筒
の軸線方向へ移動可能な仕切部材であつて前記ピ
ストンロツドの伸び時に液体が流動する第１のポ
ートと縮み時に液体が流動する第２のポートとを
有する仕切部材と、該仕切部材の下側に配置さ
れ、前記第１のポートの下端に向けて偏倚される
第１の弁体と、前記仕切部材の上側に配置され、
前記第２のポートの上端を開閉する第２の弁体と
を含む、液圧緩衝器。 an inner cylinder, an outer cylinder arranged radially outward from the inner cylinder at a distance, a piston rod whose upper end projects outward from the inner cylinder, and a piston rod arranged at a lower part of the inner cylinder. and a valve that generates a damping force when the piston rod is compressed, the piston being slidably disposed inside the inner cylinder in a liquid-tight manner and connecting the lower end of the piston rod. a piston, the piston having a space and a port opened in the axial direction of the inner cylinder and opening into the space; and a piston disposed in the space of the piston, the inner cylinder being connected to the inner cylinder within a limited range with respect to the piston. a partition member movable in the axial direction of the piston rod, the partition member having a first port through which liquid flows when the piston rod is extended, and a second port through which liquid flows when the piston rod retracts; a first valve body disposed and biased toward the lower end of the first port; disposed above the partition member;
a second valve body that opens and closes an upper end of the second port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP321383U JPS59110448U (en) | 1983-01-17 | 1983-01-17 | hydraulic shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP321383U JPS59110448U (en) | 1983-01-17 | 1983-01-17 | hydraulic shock absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59110448U JPS59110448U (en) | 1984-07-25 |
| JPS6317872Y2 true JPS6317872Y2 (en) | 1988-05-20 |
Family
ID=30134837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP321383U Granted JPS59110448U (en) | 1983-01-17 | 1983-01-17 | hydraulic shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59110448U (en) |
-
1983
- 1983-01-17 JP JP321383U patent/JPS59110448U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59110448U (en) | 1984-07-25 |
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