JPH0517464Y2 - - Google Patents
Info
- Publication number
- JPH0517464Y2 JPH0517464Y2 JP1986181446U JP18144686U JPH0517464Y2 JP H0517464 Y2 JPH0517464 Y2 JP H0517464Y2 JP 1986181446 U JP1986181446 U JP 1986181446U JP 18144686 U JP18144686 U JP 18144686U JP H0517464 Y2 JPH0517464 Y2 JP H0517464Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve plate
- washer
- peripheral end
- liquid chamber
- 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
- 239000007788 liquid Substances 0.000 claims description 42
- 230000002093 peripheral effect Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 14
- 238000013016 damping Methods 0.000 claims description 14
- 239000006096 absorbing agent Substances 0.000 claims description 8
- 230000035939 shock Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は自動車の懸架装置等に使用される液圧
緩衝器のベースバルブに関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a base valve of a hydraulic shock absorber used in an automobile suspension system, etc.
従来の技術
従来、自動車の懸架装置等に使用され、自動車
の上下振動を減衰させる液圧緩衝器は、シリンダ
の下端部に配設されたベースバルブによつてピス
トンの圧縮行程時（ピストンがシリンダ内方から
外方へ向かつて移動する時）に圧縮側減衰力を発
生させるようにしている。このような液圧緩衝器
のベースバルブは、実開昭59−32743号公報に示
されるように、シリンダの下端部に配設されたバ
ルブケースと、このバルブケースに穿設され、バ
ルブケースによつて画成された上下二つの液室を
連通する連通路と、この連通路の下端に配設さ
れ、ピストンの圧縮行程時に上方の液室から下方
の液室へ液体を置換流通させて減衰力を発生させ
る略円板状のバルブプレートとを備え、このバル
ブプレートの内周端部がバルブケースのシート部
内周側側面に略円板状のワツシヤを介してリベツ
ト固定されてなつている。Conventional technology Hydraulic shock absorbers used in automobile suspension systems to damp vertical vibrations of automobiles use a base valve disposed at the lower end of the cylinder to prevent the piston from entering the cylinder during its compression stroke. When moving from the inside to the outside), a compression damping force is generated. As shown in Japanese Utility Model Application Publication No. 59-32743, the base valve of such a hydraulic shock absorber includes a valve case disposed at the lower end of the cylinder, and a hole bored in the valve case. A communication passage that communicates the two upper and lower liquid chambers thus defined, and a communication passage provided at the lower end of this communication passage, which displaces and circulates liquid from the upper liquid chamber to the lower liquid chamber during the compression stroke of the piston, causing damping. The valve plate is provided with a substantially disk-shaped valve plate that generates force, and the inner circumferential end of the valve plate is fixed to the inner circumferential side surface of the seat portion of the valve case by a rivet via a substantially disk-shaped washer.
考案が解決しようとする問題点
以上のように構成されたベースバルブにあつて
は、高い減衰力を得る場合に、バルブプレートの
板厚及び枚数が増加されて、バルブプレートの剛
性が高められるようになつている。そのため、高
減衰力発生時には、バルブプレートの内周端部に
大きな曲げモーメントが作用し、バルブプレート
の内周端部を締結固定するリベツトが変形し、バ
ルブプレートの内周端部を確実に高剛性でもつて
保持できず、作動時に高減衰力を安定して得るこ
とができないという問題を有していた。Problems to be solved by the invention In the base valve configured as described above, in order to obtain a high damping force, the thickness and number of valve plates are increased, and the rigidity of the valve plate is increased. It's getting old. Therefore, when a high damping force is generated, a large bending moment acts on the inner peripheral end of the valve plate, deforming the rivet that fastens and fixes the inner peripheral end of the valve plate, and ensuring that the inner peripheral end of the valve plate is raised high. There was a problem in that even the rigidity could not be maintained, and a high damping force could not be stably obtained during operation.
そこで、本考案はこの従来技術の問題点を解決
し、高減衰力を安定して発生させることができる
液圧緩衝器のベースバルブを提供することを目的
とする。 SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art and provide a base valve for a hydraulic shock absorber that can stably generate a high damping force.
問題点を解決するための手段
本考案は上記目的を達成するため、バルブプレ
ートの内周端部と塑性変形部材との間に皿形円板
状のワツシヤをその外周端部がバルブプレートに
当接するように介装し、該ワツシヤを軸方向に弾
性変形させて押しつぶした状態で前記バルブプレ
ートと共にバルブケースにかしめ固定し、該ワツ
シヤの外周端部をバルブプレートの撓み支点とす
るようにした。Means for Solving the Problems In order to achieve the above object, the present invention provides a dish-shaped disc-shaped washer between the inner peripheral end of the valve plate and the plastically deformable member, the outer peripheral end of which is in contact with the valve plate. The washer was inserted so as to be in contact with the valve plate, and the washer was elastically deformed in the axial direction and, in a compressed state, was caulked and fixed to the valve case together with the valve plate, so that the outer peripheral end of the washer was used as a fulcrum of deflection of the valve plate.
作 用
皿形円板状のワツシヤは軸方向に弾性変形させ
て押しつぶした状態で塑性変形部材とバルブプレ
ートの間に介装されるため、バルブプレートの撓
み支点となるワツシヤの外周端部は常に一定直径
に維持され、その状態で塑性変形部材のかしめ基
部を支点としたワツシヤ自身の軸方向の弾発力に
よつてバルブプレートに強固に押し付けられる。
このため、バルブプレートが撓み変形して減衰力
を発生させる際に、バルブプレートの内周端部に
生じる曲げモーメントは、常に一定直径であるワ
ツシヤの外周端部によつて確実に受け止められ
る。Function The dish-shaped disc-shaped washer is inserted between the plastically deformed member and the valve plate while being elastically deformed in the axial direction and crushed, so the outer peripheral end of the washer, which is the fulcrum of the valve plate's deflection, is always The diameter is maintained at a constant value, and in this state, the washer is firmly pressed against the valve plate by its own axial elastic force using the caulking base of the plastically deformable member as a fulcrum.
Therefore, when the valve plate flexibly deforms to generate a damping force, the bending moment generated at the inner peripheral end of the valve plate is reliably received by the outer peripheral end of the washer, which always has a constant diameter.
実施例
以下、本考案の一実施例を図面とともに詳述す
る。Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
第１図において、１は内部に液体が充填された
シリンダであり、このシリンダ１は内筒１ａと外
筒１ｂとからなり、この内筒１ａと外筒１ｂとの
間にはガスと液体とが充填されたリザーバ室Ａが
形成されて、下端が蓋体１ｃにより塞がれてい
る。そして、このシリンダ１の内筒１ａは図外の
ピストンによつて上部液室（図示せず）と下部液
室Ｂとに画成されている。２はこのシリンダ１の
下端部に配設されたベースバルブであり、このベ
ースバルブ２のバルブケース３がシリンダ１の内
筒１ａ下端に固定され、このバルブケース３によ
り下部液室Ｂ（上方の液室）とバルブ液室（下方
の液室）Ｃとが画成されている。そして、バルブ
ケース３には、バルブ液室Ｃとリザーバ室Ａとを
連通する通路４が外周下端に形成される一方、下
部液室Ｂからバルブ液室Ｃへ液体を流通させるた
めの連通路５が半径方向内方の位置に穿設される
とともに、バルブ液室Ｃから下部液室Ｂへ液体を
流通させるための連通路６が通路４と連通路５の
間の半径方向位置に穿設されている。そして、バ
ルブ液室Ｃから下部液室Ｂへ液体を流通させるた
めの連通路６の上端には、この連通路６の上端を
塞ぐ円板状のチエツクプレート７と、このチエツ
クプレート７をシート部８に弱いばね力で付勢す
るチエツクスプリング９と、このチエツクスプリ
ング９を支持するばね受け部材１０とからなるチ
エツクバルブ１１が配設されている。一方、下部
液室Ｂからバルブ液室Ｃへ液体を流通させる連通
路５の下端には、この連通路５の下端を塞ぐ円板
状のバルブプレート１２が配設されている。そし
て、バルブケース３の略中央部に挿通されたリベ
ツト（塑性変形部材）１３の頭部１４と前記バル
ブプレート１２の内周端部との間には、バルブプ
レート１２の内周端部をシート部１５側へ押圧す
る皿形円板状のワツシヤ１６（第４図〜第５図参
照）が逆ハの字形に介装されている（第２図参
照）。そして、第３図に示すように、ばね受け部
材１０、バルブケース３、バルブプレート１２及
びワツシヤ１６は軸方向下方（リベツト１３の頭
部１４側）へ押圧され、その後リベツト１３の先
端部１７がかしめられて一体化されている。その
ため、バルブプレート１２とリベツト１３の頭部
１４との間に介装されたワツシヤ１６は、軸方向
下方へ撓み変形させられて押しつぶされ、一方の
側面がバルブプレート１２の内周端部に密接させ
られて、他方の側面がリベツト１３の頭部１４に
密接させられている。したがつて、バルブプレー
ト１２の内周端部には、ワツシヤ１６の外周端部
によつて常時シート部１５側へ付勢する軸方向力
が作用することとなり、ワツシヤ１６の外周端部
は所定直径のバルブプレート１２の撓み支点とな
る。 In Fig. 1, 1 is a cylinder filled with liquid, and this cylinder 1 consists of an inner cylinder 1a and an outer cylinder 1b, and between the inner cylinder 1a and the outer cylinder 1b, gas and liquid are A reservoir chamber A filled with is formed, and its lower end is closed by a lid 1c. The inner tube 1a of the cylinder 1 is defined into an upper liquid chamber (not shown) and a lower liquid chamber B by a piston (not shown). Reference numeral 2 designates a base valve disposed at the lower end of this cylinder 1. A valve case 3 of this base valve 2 is fixed to the lower end of the inner cylinder 1a of the cylinder 1, and this valve case 3 connects the lower liquid chamber B (the upper A liquid chamber) and a valve liquid chamber (lower liquid chamber) C are defined. In the valve case 3, a passage 4 for communicating the valve liquid chamber C and the reservoir chamber A is formed at the lower end of the outer periphery, while a communication passage 5 for circulating the liquid from the lower liquid chamber B to the valve liquid chamber C. is bored at a radially inward position, and a communication passage 6 for circulating liquid from the valve liquid chamber C to the lower liquid chamber B is bored at a radial position between the passage 4 and the communication passage 5. ing. At the upper end of the communication passage 6 for distributing liquid from the valve liquid chamber C to the lower liquid chamber B, there is a disk-shaped check plate 7 that closes the upper end of this communication passage 6, and this check plate 7 is connected to a seat section. A check valve 11 consisting of a check spring 9 biased by a weak spring force and a spring receiving member 10 supporting the check spring 9 is disposed at the check valve 8 . On the other hand, a disk-shaped valve plate 12 is disposed at the lower end of the communication passage 5 that allows liquid to flow from the lower liquid chamber B to the valve liquid chamber C, and closes the lower end of the communication passage 5. The inner circumferential end of the valve plate 12 is seated between the head 14 of the rivet (plastically deformable member) 13 inserted into the approximate center of the valve case 3 and the inner circumferential end of the valve plate 12. A dish-shaped disk-shaped washer 16 (see FIGS. 4 and 5) that presses toward the portion 15 is interposed in an inverted V-shape (see FIG. 2). Then, as shown in FIG. 3, the spring receiving member 10, the valve case 3, the valve plate 12, and the washer 16 are pressed axially downward (towards the head 14 of the rivet 13), and then the tip 17 of the rivet 13 is pressed down. It is caulked and integrated. Therefore, the washer 16 interposed between the valve plate 12 and the head 14 of the rivet 13 is flexibly deformed and crushed in the axial direction downward, and one side surface is brought into close contact with the inner peripheral end of the valve plate 12. The other side is brought into close contact with the head 14 of the rivet 13. Therefore, an axial force is constantly applied to the inner peripheral end of the valve plate 12 by the outer peripheral end of the washer 16, which urges it toward the seat portion 15. This serves as a fulcrum for the deflection of the valve plate 12 of the diameter.
以上述べた本実施例によれば、図外のピストン
の伸行程時には、下部液室Ｂの液圧がバルブ液室
Ｃの液圧よりも所定圧力だけ低くなると、チエツ
クバルブ１１が開弁してバルブ液室Ｃ及びリザー
バ室Ａから下部液室Ｂへ液体を流通させる。一
方、図外のピストンの圧縮行程時には、下部液室
Ｂの液圧がバルブ液室Ｃの液圧よりも所定圧力だ
け高くなると、バルブプレート１２が撓み変形し
て下部液室Ｂからバルブ液室Ｃ及びリザーバ室Ａ
に液体を置換流通させて減衰力を生じさせる。こ
の減衰力発生時、バルブプレート１２の内周端部
には、バルブプレート１２の撓み変形に起因する
曲げモーメントが作用する。しかし、バルブプレ
ート１２の内周端部はワツシヤ１６の外周端部に
よつて常時シート部１５側へ付勢されており、バ
ルブプレート１２の撓み変形に起因する曲げモー
メントが高剛性のワツシヤ１６によつて生ずる軸
方向力で確実に保持される。そのため、リベツト
１３の頭部１４には、この頭部１４を塑性変形さ
せるような過大な力が作用することなく、バルブ
プレート１２の内周端部がバルブケース３のシー
ト部１５に確実にリベツト１３で固定される。
又、ワツシヤ１６が押しつぶされた状態でリベツ
ト１３の頭部１４とバルブプレート１２の間に介
装されていることにより、バルブプレート１２の
撓み支点となる外周端部の直径は常時一定に維持
される。このため、バルブプレート１２は、常時
一定直径のワツシヤ１６の外周端の角部で確実に
支持され、所望の減衰力特性を安定して発揮する
こととなる。 According to this embodiment described above, during the extension stroke of the piston (not shown), when the fluid pressure in the lower fluid chamber B becomes lower than the fluid pressure in the valve fluid chamber C by a predetermined pressure, the check valve 11 opens. Liquid is caused to flow from the valve liquid chamber C and the reservoir chamber A to the lower liquid chamber B. On the other hand, during the compression stroke of the piston (not shown), when the hydraulic pressure in the lower liquid chamber B becomes higher than the liquid pressure in the valve liquid chamber C by a predetermined pressure, the valve plate 12 is bent and deformed, and the valve plate 12 is moved from the lower liquid chamber B to the valve liquid chamber. C and reservoir room A
A damping force is generated by displacing liquid through the damping force. When this damping force is generated, a bending moment due to the bending deformation of the valve plate 12 acts on the inner circumferential end of the valve plate 12. However, the inner peripheral end of the valve plate 12 is always urged toward the seat portion 15 by the outer peripheral end of the washer 16, and the bending moment caused by the bending deformation of the valve plate 12 is applied to the highly rigid washer 16. The resulting axial force ensures secure retention. Therefore, the inner circumferential end of the valve plate 12 is reliably riveted to the seat portion 15 of the valve case 3 without any excessive force acting on the head 14 of the rivet 13 that would plastically deform the head 14. It is fixed at 13.
Furthermore, since the washer 16 is inserted between the head 14 of the rivet 13 and the valve plate 12 in a compressed state, the diameter of the outer peripheral end, which is the fulcrum of the valve plate 12, is always maintained constant. Ru. Therefore, the valve plate 12 is reliably supported at the corner of the outer peripheral end of the washer 16, which has a constant diameter at all times, and can stably exhibit desired damping force characteristics.
考案の効果
以上述べたように本考案は、バルブプレートの
内周端部と塑性変形部材との間に皿形円板状のワ
ツシヤをその外周端部がバルブプレートに当接す
るように介装して、塑性変形部材のかしめ基部を
支点としたワツシヤの軸方向の弾発力によつてバ
ルブプレートの内周端部を確実に支持するように
したことにより、高減衰力発生時にバルブプレー
トが大きく撓み変形しても塑性変形部材の変形を
確実に防止することができ、又、ワツシヤを軸方
向に弾性変形させて押しつぶした状態でバルブプ
レートと共にバルブケースにかしめ固定し、該ワ
ツシヤの外周端部をバルブプレートの撓み支点と
したことにより、バルブプレートに作用する曲げ
モーメントの変化にかかわらずバルブプレートの
撓み支点の直径を常に一定に保つことができる。
したがつて、本考案はこれらにより、安定、かつ
高精度の減衰力特性を得ることが可能である。Effects of the Invention As described above, the present invention interposes a dish-shaped disc-shaped washer between the inner peripheral end of the valve plate and the plastically deformable member so that the outer peripheral end of the washer comes into contact with the valve plate. By ensuring that the inner peripheral end of the valve plate is supported by the elastic force in the axial direction of the washer with the fulcrum of the caulking base of the plastically deformable member as a fulcrum, the valve plate will not expand when high damping force is generated. It is possible to reliably prevent deformation of the plastically deformable member even if the washer is flexibly deformed, and the washer is elastically deformed in the axial direction and is crimped and fixed to the valve case together with the valve plate, and the outer peripheral end of the washer is fixed by caulking to the valve case together with the valve plate. By setting the fulcrum of the valve plate as the fulcrum of the valve plate, the diameter of the fulcrum of the valve plate can always be kept constant regardless of changes in the bending moment acting on the valve plate.
Therefore, the present invention can obtain stable and highly accurate damping force characteristics.
第１図は本考案の実施例を示す液圧緩衝器の下
端部半断面図、第２図〜第３図は同ベースバルブ
のかしめ前の状態を示す半断面図、第４図は本考
案に係るワツシヤの正面図、第５図は第４図の
−断面図である。
１……シリンダ、２……ベースバルブ、３……
バルブケース、５……連通路、１２……バルブプ
レート、１３……リベツト（塑性変形部材）、１
４……頭部、１５……シート部、１６……ワツシ
ヤ、Ｂ……下部液室（上方の液室）、Ｃ……バル
ブ液室（下方の液室）。
Fig. 1 is a half sectional view of the lower end of a hydraulic shock absorber showing an embodiment of the present invention, Figs. 2 and 3 are half sectional views showing the state of the base valve before caulking, and Fig. 4 is a half sectional view of the lower end of the hydraulic shock absorber according to the present invention. FIG. 5 is a front view of the washer according to FIG. 1...Cylinder, 2...Base valve, 3...
Valve case, 5... Communication path, 12... Valve plate, 13... Rivet (plastic deformation member), 1
4... Head, 15... Seat part, 16... Washer, B... Lower liquid chamber (upper liquid chamber), C... Valve liquid chamber (lower liquid chamber).
Claims (1)
と、該バルブケースに穿設され、前記バルブケー
スによつて画成された上下二つの液室を連通する
連通路と、該連通路の下端に配設され、ピストン
の圧縮行程時に上方の液室から下方の液室へ液体
を置換流通させて減衰力を発生させる略円板状の
バルブプレートとを備え、該バルブプレートの内
周端部をバルブケースに塑性変形部材でかしめ固
定してなる液圧緩衝器のベースバルブにおいて、
前記バルブプレートの内周端部と塑性変形部材と
の間に皿形円板状のワツシヤをその外周端部がバ
ルブプレートに当接するように介装し、該ワツシ
ヤを軸方向に弾性変形させて押しつぶした状態で
前記バルブプレートと共にバルブケースにかしめ
固定し、該ワツシヤの外周端部をバルブプレート
の撓み支点としたことを特徴とする液圧緩衝器の
ベースバルブ。 A valve case disposed at the lower end of the cylinder, a communication passage bored in the valve case and communicating two upper and lower liquid chambers defined by the valve case, and a communication passage disposed at the lower end of the communication passage. and a substantially disc-shaped valve plate that generates damping force by displacing liquid from the upper liquid chamber to the lower liquid chamber during the compression stroke of the piston, and the inner peripheral end of the valve plate is connected to the valve plate. In the base valve of a hydraulic shock absorber, which is fixed to the case by caulking with a plastically deformable member,
A dish-shaped disc-shaped washer is interposed between the inner peripheral end of the valve plate and the plastically deformable member so that the outer peripheral end of the washer comes into contact with the valve plate, and the washer is elastically deformed in the axial direction. 1. A base valve for a hydraulic shock absorber, characterized in that the base valve is caulked and fixed to a valve case together with the valve plate in a crushed state, and the outer peripheral end of the washer is used as a fulcrum of deflection of the valve plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986181446U JPH0517464Y2 (en) | 1986-11-26 | 1986-11-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986181446U JPH0517464Y2 (en) | 1986-11-26 | 1986-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6386440U JPS6386440U (en) | 1988-06-06 |
| JPH0517464Y2 true JPH0517464Y2 (en) | 1993-05-11 |
Family
ID=31126321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986181446U Expired - Lifetime JPH0517464Y2 (en) | 1986-11-26 | 1986-11-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517464Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625450U (en) * | 1979-08-02 | 1981-03-09 | ||
| JPS5932743B2 (en) * | 1980-09-24 | 1984-08-10 | 防衛庁技研究本部長 | correlation tracking device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS508367U (en) * | 1973-05-09 | 1975-01-28 | ||
| JPS56138218U (en) * | 1980-03-18 | 1981-10-20 | ||
| JPS5932743U (en) * | 1982-08-26 | 1984-02-29 | カヤバ工業株式会社 | Hydraulic shock absorber base valve structure |
| JPS60126736U (en) * | 1984-02-03 | 1985-08-26 | サンスタ−技研株式会社 | floating disk |
-
1986
- 1986-11-26 JP JP1986181446U patent/JPH0517464Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625450U (en) * | 1979-08-02 | 1981-03-09 | ||
| JPS5932743B2 (en) * | 1980-09-24 | 1984-08-10 | 防衛庁技研究本部長 | correlation tracking device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6386440U (en) | 1988-06-06 |
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