JPH041390Y2 - - Google Patents
Info
- Publication number
- JPH041390Y2 JPH041390Y2 JP1984185402U JP18540284U JPH041390Y2 JP H041390 Y2 JPH041390 Y2 JP H041390Y2 JP 1984185402 U JP1984185402 U JP 1984185402U JP 18540284 U JP18540284 U JP 18540284U JP H041390 Y2 JPH041390 Y2 JP H041390Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- circumferential direction
- bumper
- grooves
- bumper spring
- 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
- 230000035939 shock Effects 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000005336 cracking Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Vibration Dampers (AREA)
- Fluid-Damping Devices (AREA)
- Springs (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輌に用いられる衝撃吸収
スプリングの過大な変形を防止し、サスペンシヨ
ン系の衝撃を緩和するバンパースプリングに係
り、特に円筒蛇腹状に形成されたバンパースプリ
ングに関する。[Detailed description of the invention] [Industrial field of application] The present invention relates to a bumper spring that prevents excessive deformation of shock absorption springs used in vehicles such as automobiles and cushions shocks in suspension systems. This invention relates to a bumper spring formed into a bellows shape.
バンパースプリングは車輌のシヨツクアブソー
バに設けられる衝撃吸収スプリングの過大変形を
防止して、車輌の乗心地性や衝撃吸収スプリング
の耐久性を確保するべく、コイルスプリング等の
衝撃吸収スプリングのバウンドストツパとして用
いられており、従来、シヨツクアブソーバ軸と同
軸に装着して用いる円筒状のものが知られてい
る。
Bumper springs are used as bounce stoppers for shock absorbing springs such as coil springs in order to prevent excessive deformation of the shock absorbing springs installed in the shock absorber of a vehicle, and to ensure the ride comfort of the vehicle and the durability of the shock absorbing springs. Conventionally, a cylindrical type is known which is used by being mounted coaxially with the shock absorber shaft.
このように用いられるバンパースプリングは、
一般にポリウレタンまたは発砲ウレタン等の弾性
部材から形成されており、バネ特性を考慮して円
筒部の縦断面形状を、蛇腹状に形成したものが知
られている。 Bumper springs used in this way are
Generally, it is made of an elastic member such as polyurethane or urethane foam, and it is known that the vertical cross-sectional shape of the cylindrical portion is formed into a bellows shape in consideration of spring characteristics.
ところが上述のような円筒蛇腹状に形成された
バンパースプリングにあつては、繰返し圧縮応力
を受けると、疲労により周方向または縦方向に亀
裂が入り、ついには割れに至るという問題があ
る。周方向に割れた場合はシヨツクアブソーバ軸
にさし込まれていることから脱落せずに保持され
るので、急激な乗心地の悪化あるいはスプリング
の過大変形を防止することができるが、縦方向に
割れた場合は、シヨツクアブソーバ軸から脱落し
てしまうので、衝撃吸収スプリングの過大変形を
防止することができず、乗心地が悪くなるという
問題が生じる。
However, the bumper spring formed in the shape of a cylindrical bellows as described above has a problem in that when subjected to repeated compressive stress, cracks occur in the circumferential direction or longitudinal direction due to fatigue, eventually leading to cracking. If the spring cracks in the circumferential direction, it will not fall off because it is inserted into the shock absorber shaft, preventing a sudden deterioration in riding comfort or excessive deformation of the spring. If it breaks, it will fall off the shock absorber shaft, making it impossible to prevent excessive deformation of the shock absorbing spring, resulting in a problem of poor riding comfort.
したがつて、バンパースプリングとしては、周
方向の割れに比較して、縦方向割れに対する耐性
の高いものが望ましいことになるが、要求される
ばね特性によつては、縦断面形状が制限されるた
め、縦方向の割れに強い形状のものとすることが
困難な場合がある。 Therefore, it is desirable for bumper springs to have higher resistance to longitudinal cracking than circumferential cracking, but the vertical cross-sectional shape is limited depending on the required spring characteristics. Therefore, it may be difficult to create a shape that is resistant to longitudinal cracking.
本考案の目的は、圧縮繰返し疲労による破損モ
ードを周方向割れになるようにして縦方向割れを
減少させ、寿命を向上させることができる形状の
バンパースプリングを提供することにある。 An object of the present invention is to provide a bumper spring having a shape that can change the failure mode due to cyclic compression fatigue to circumferential cracking, thereby reducing longitudinal cracking and improving the service life.
本考案は、外周面のすべての山部に軸方向に延
在させ、かつ周方向に間隔を置いて複数の溝を設
けたものである。
The present invention has a plurality of grooves extending in the axial direction and spaced apart in the circumferential direction on all the peaks on the outer circumferential surface.
このような形状のものとすることによつて、縦
方向割れの原因である圧縮変形時の周方向歪みが
低減される。特に間隔をおいて複数個の溝を設け
ることにより、周方向全体の歪みの低減は大き
く、かつ均一化される。これにより圧縮繰返し疲
労による破損モードは周方向割れにのみつながる
ものとなり、縦方向割れの耐性が高まり、その結
果、寿命が向上されることになる。
By having such a shape, circumferential strain during compressive deformation, which is a cause of longitudinal cracking, is reduced. In particular, by providing a plurality of grooves at intervals, the distortion in the entire circumferential direction can be greatly reduced and made uniform. As a result, the failure mode due to cyclic compression fatigue only leads to cracks in the circumferential direction, and the resistance to cracks in the longitudinal direction is increased, resulting in an improved life.
以下本考案を実施例に基づいて説明する。 The present invention will be explained below based on examples.
第１図Ａに本考案の一実施例の縦断面図を、第
１図Ｂに同Ａ図示線Ｘ−Ｘにおける断面図をそれ
ぞれ示す。それらの図に示すように、バンパース
プリング１０はポリウレタン等の弾性材からなる
円筒の内面と外面に、円環状の溝を千鳥状に配置
して形成した円筒蛇腹状のものとされており、そ
の外周面のすべての山部１２に、軸方向に延在さ
せ、かつ、周方向に間隔を置いて３個所に、切欠
き溝１４を形成したものとなつている。この切欠
き溝１４は第２図に拡大して示すように、溝底面
は所定の曲率Ｒを有して形成されており、これに
よつて応力集中を緩和する形状のものとなつてい
る。また、深さＤは外周面の谷部１６の底面に略
一致させて形成されている。 FIG. 1A shows a longitudinal sectional view of an embodiment of the present invention, and FIG. 1B shows a sectional view taken along line XX in FIG. 1A. As shown in these figures, the bumper spring 10 is a bellows-shaped cylinder made of an elastic material such as polyurethane, with annular grooves arranged in a staggered manner on the inner and outer surfaces of the cylinder. Notch grooves 14 are formed in all the peaks 12 on the outer circumferential surface, extending in the axial direction and at three locations spaced apart in the circumferential direction. As shown in an enlarged view in FIG. 2, the notched groove 14 has a groove bottom surface having a predetermined curvature R, and is shaped to relieve stress concentration. Further, the depth D is formed to substantially match the bottom surface of the valley portion 16 on the outer peripheral surface.
このように構成されることから、車輌がバウン
ドしたとき、バンパースプリング１０は円筒軸方
向に圧縮されて外径が大きくなる方向に変形さ
れ、主として山部１２の周方向に引張応力が作用
して、その周方向に歪みが発生するが、この周方
向歪みは切欠き溝１４によつて吸収されることに
なる。したがつて、圧縮繰返しによる周方向歪み
は軽減されるので、圧縮繰返し疲労による縦方向
割れは著しく軽減され、これによつて寿命が向上
されることになる。 With this configuration, when the vehicle bounces, the bumper spring 10 is compressed in the cylindrical axial direction and deformed in the direction of increasing the outer diameter, and tensile stress is mainly applied in the circumferential direction of the crest 12. , distortion occurs in the circumferential direction, but this circumferential distortion is absorbed by the notch groove 14. Therefore, circumferential strain due to repeated compression is reduced, and longitudinal cracking due to repeated compression fatigue is significantly reduced, thereby improving service life.
切欠き溝１４の形状、すなわち深さＤ、幅Ｗ、
底部曲率Ｒは加えられる応力に応じて決められる
べきものである。また、切欠き溝１４の相対する
溝側面１８，２０は平行または非平行どちらでも
よい。また、溝の数は３個所に限定されず２個所
以上であればよいことはいうまでもない。 The shape of the notch groove 14, that is, the depth D, the width W,
The bottom curvature R should be determined depending on the applied stress. Moreover, the opposing groove side surfaces 18 and 20 of the notched groove 14 may be either parallel or non-parallel. Further, it goes without saying that the number of grooves is not limited to three, but may be two or more.
以上説明したように、本考案によれば、周方向
に間隔を置いて、かつ、軸方向に延在させてすべ
ての山部に溝を設けているから、繰返し加えられ
る圧縮変形時の周方向歪みが周方向均一に低減さ
れ、これにより縦方向割れの耐性が高められ寿命
が向上されるという効果がある。
As explained above, according to the present invention, grooves are provided in all peaks at intervals in the circumferential direction and extend in the axial direction, so that grooves are provided in the circumferential direction during repeated compressive deformation. Distortion is uniformly reduced in the circumferential direction, which has the effect of increasing resistance to longitudinal cracking and improving service life.
第１図Ａは本考案の一実施例の断面図、第１図
Ｂは第１図Ａ図示線Ｘ−Ｘにおける断面図、第２
図は第１図図示実施例の要部拡大図である。
１２……山部、１４……切欠き溝、１６……谷
部。
FIG. 1A is a sectional view of one embodiment of the present invention, FIG. 1B is a sectional view taken along line XX in FIG. 1A, and FIG.
The figure is an enlarged view of the main part of the embodiment shown in FIG. 12...crest, 14...notch groove, 16...trough.
Claims (1)
れ、衝撃吸収スプリングの過大変形を防止する
円筒蛇腹状のバンパースプリングにおいて、外
周面のすべての山部に軸方向に延在させ、か
つ、周方向に間隔を置いて複数の溝を設けたこ
とを特徴とするバンパースプリング。 ２ 実用新案登録請求の範囲第１項記載の考案に
おいて、前記溝は、底面が所定曲率を有するも
のであることを特徴とするバンパースプリン
グ。[Scope of Claim for Utility Model Registration] 1. A cylindrical bellows-shaped bumper spring that is installed coaxially with the shock absorber shaft of a vehicle and prevents excessive deformation of the shock absorbing spring, which extends in the axial direction on all peaks on the outer peripheral surface. A bumper spring characterized in that a plurality of grooves are provided at intervals in the circumferential direction. 2. The bumper spring according to claim 1, wherein the groove has a bottom surface with a predetermined curvature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984185402U JPH041390Y2 (en) | 1984-12-06 | 1984-12-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984185402U JPH041390Y2 (en) | 1984-12-06 | 1984-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61100606U JPS61100606U (en) | 1986-06-27 |
| JPH041390Y2 true JPH041390Y2 (en) | 1992-01-17 |
Family
ID=30742875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984185402U Expired JPH041390Y2 (en) | 1984-12-06 | 1984-12-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH041390Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4623462B2 (en) * | 2005-03-31 | 2011-02-02 | 倉敷化工株式会社 | Bump stopper |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735534B2 (en) * | 1974-05-27 | 1982-07-29 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5712271Y2 (en) * | 1976-05-21 | 1982-03-11 | ||
| JPS5735534U (en) * | 1980-08-07 | 1982-02-24 |
-
1984
- 1984-12-06 JP JP1984185402U patent/JPH041390Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735534B2 (en) * | 1974-05-27 | 1982-07-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61100606U (en) | 1986-06-27 |
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